Composition for reducing hydrogen sulfide emission in live pig breeding process, preparation method and device

Abstract

The invention relates to the technical field of livestock breeding industry, and particularly discloses a composition for reducing hydrogen sulfide emission in the live pig breeding process and a preparation method and device.The composition is prepared from, by weight, 800-1200 parts of wheat, 600-800 parts of soybean meal, 500-700 parts of rice bran, 200-600 parts of sorghum dry distillers' grains, 300-500 parts of cassava distillers' grains, 6-20 parts of oil meal, 2-9 parts of cottonseed meal, 6-12 parts of peanut kernel meal and 30-60 parts of DL-propargyl glycine. The feed is prepared from the following raw materials in parts by weight: 0.6 to 2.2 parts of feed salt, 0.04 to 0.25 part of betaine, 0.01 to 0.06 part of tachyplesin antibacterial peptide, 1 to 10 parts of saccharomyces cerevisiae boulardii powder, 12 to 36 parts of xylooligosaccharide, 1 to 4 parts of krill freeze-dried powder, 0.02 to 0.15 part of methionine and 0.6 to 2.4 parts of choline chloride. The pig feed has the characteristics of being rich in nutrition, beneficial to digestion and absorption, good in growth and development condition of pigs and good in effect of relieving or inhibiting hydrogen sulfide gas emission of the pigs.

Description

Technical Field

[0001] The present invention relates to the technical field of livestock breeding, and in particular to a composition, a preparation method and a device for reducing hydrogen sulfide (H2S) emissions in a pig breeding process. Background Art

[0002] Hydrogen sulfide is a colorless, volatile, foul-smelling gas with a specific gravity of 1.19 and is easily soluble in water. When pigs eat protein-rich feed and have indigestion, it will lead to an imbalance in the intestinal flora, and a large amount of hydrogen sulfide will be decomposed and excreted by specific intestinal flora. As a monogastric animal, pigs cannot secrete enzymes that can quickly decompose proteins, peptides and amino acids. After the feed is eaten by pigs, it forms fecal residues after digestion and absorption. A large amount of protein, peptides and amino acids in the feed are not fully digested and absorbed, and will be excreted from the body in the form of feces. These moist fecal residues will decompose under the action of fecal microorganisms to form relatively more hydrogen sulfide, ammonia and methane gases; if the feces are not cleaned in time, they will be fermented again to produce a large amount of hydrogen sulfide. In the process of pig farming, hydrogen sulfide is difficult to deal with in time. It will accumulate in the pig house for a long time. Hydrogen sulfide is often adsorbed on the wet ground and walls, and is repeatedly inhaled by pigs during breathing. It is adsorbed on the pig mucosa and combined with sodium ions to form sodium sulfide, which strongly stimulates the mucosa, causing congestion and edema of the mucosa, causing conjunctivitis, bronchitis, pneumonia or pulmonary edema, and showing symptoms such as tearing, corneal opacity, photophobia or coughing; hydrogen sulfide can also enter the blood through the alveoli, oxidized into sulfate and affect intracellular metabolism; hydrogen sulfide interferes with pig colon cell metabolism and damages intestinal mucosa. It is considered to be the third transmitter gas after nitric oxide and carbon monoxide, and is involved in inflammation, intestinal motility, oxidative stress, ulcer healing, vascular tension and cell apoptosis. In short, pigs are in a certain concentration of hydrogen sulfide environment for a long time. When the concentration of hydrogen sulfide in the pig house reaches 0.001%, it is easy to cause the pigs to become weak and their resistance to disease to decrease. However, my country has a huge number of pigs, and one pig will produce about 76g of hydrogen sulfide gas each year, which not only has a huge impact on the growth and development of pigs, but also damages the ecological environment. Therefore, reducing the emission of hydrogen sulfide in the pig production process will be of great significance to the development of animal husbandry.

[0003] Although the generation of hydrogen sulfide is affected by many factors, it is mainly related to the type of feed fed daily and the degree of digestion of the feed by pigs. Studies have shown that reducing the types of pig excrement by changing the feed composition is the main way to reduce hydrogen sulfide emissions. Therefore, it is a very meaningful research approach to help pigs decompose protein in advance, reduce the moisture in pig excrement, reduce the decomposition ability of microorganisms in pig excrement, and add a certain amount of sulfur oxide inhibitors or decomposers to simultaneously reduce the emission of hydrogen sulfide. The patent document with the publication number "CN107927403A" discloses a pig feed that helps pig growth. The preparation method is as follows: 55-60 parts of corn, 45-55 parts of dehulled soybean meal, 5-20 parts of fish meal, 20-40 parts of wood fiber, 20-35 parts of alfalfa meal, 1-2 parts of soybean oil, 2-5 parts of coconut oil, and 1-2 parts of salt are added to a processing device and mixed and stirred to obtain pig feed; the feed raw materials are reasonably matched to supplement the nutrition required for pig growth and help increase pig production. However, the digestion and absorption effect of pigs after eating the feed is still not ideal, resulting in a high content of hydrogen sulfide, protein, polypeptide and amino acid in the gas and feces discharged by the daily metabolism of pigs, resulting in a high concentration of hydrogen sulfide enrichment in the pig house, which greatly affects the healthy growth of pigs.

[0004] Therefore, existing pig feeds have the problems of insufficient nutrition, poor digestion and absorption, and high production of hydrogen sulfide in pig excrement. Summary of the invention

[0005] In order to solve the above-mentioned technical problems existing in the existing pig feed, the present invention provides a composition, a preparation method and a device for reducing hydrogen sulfide emissions in the pig breeding process. The composition is rich in nutrition, is conducive to digestion and absorption, is in good condition for pig growth and development, and has a good effect on alleviating or inhibiting the emission of hydrogen sulfide gas by pigs.

[0006] The first technical solution of the present invention: a composition for reducing hydrogen sulfide emissions during pig breeding, comprising the following components by weight:

[0007] 800-1200 parts of wheat, 600-800 parts of soybean meal, 500-700 parts of rice bran, 200-600 parts of sorghum dry alcohol grains, 300-500 parts of cassava grains, 6-20 parts of oil powder, 2-9 parts of cottonseed meal, 6-12 parts of peanut kernel meal, 30-60 parts of DL-propargylglycine, 0.6-2.2 parts of feed salt, 0.04-0.25 parts of betaine, 0.01-0.06 parts of horseshoe crab antibacterial peptide, 1-10 parts of boulardii yeast powder, 12-36 parts of xylo-oligosaccharides, 1-4 parts of krill freeze-dried powder, 0.02-0.15 parts of methionine, and 0.6-2.4 parts of choline chloride.

[0008] In the present invention, wheat, soybean meal, rice bran, sorghum dry alcohol grains and cassava wine grains are used as main additives in the composition, which can provide basic nutrients for pig growth, wherein sorghum dry alcohol grains and cassava wine grains can promote fermentation catalysis in the body of pigs after eating feed, and reduce the generation of hydrogen sulfide in the digestion process of pigs; cottonseed meal and peanut kernel meal in the present invention are used as organic nutritional additives, which can further increase nutritional elements and better promote the growth and development of pigs; an appropriate amount of feed salt is added to supplement the salt content in the composition, and well maintain the electrolyte balance and normal physiological function in the pig; the feed salt can increase the taste of the composition, stimulate the taste of the pig, increase the feed intake of the pig, help promote the growth of the pig, increase the meat production rate, and also promote the secretion of digestive juices in the pig, and improve the feed The digestibility of the feed composition can be improved, the residual sulfur in the excrement can be reduced, and the hydrogen sulfide gas emission of the pigs can be reduced; the addition of an appropriate amount of betaine can improve the palatability of the composition, increase the feed intake of pigs, and better promote the growth of pigs; the addition of betaine can effectively maintain the vitamin potency in the composition and reduce the loss of nutrients in the composition during storage; the addition of an appropriate amount of choline chloride component can promote the reformation of amino acids, improve the utilization rate of amino acids in pigs, promote the decomposition and digestion of proteins, polypeptides and amino acids in the composition by pigs, reduce the residual amount of unabsorbed proteins, polypeptides and amino acids in feces, and thus reduce the direct source of hydrogen sulfide gas generated by subsequent microbial decomposition of feces; the addition of an appropriate amount of oil powder component can increase the fragrance and flavor of the composition The invention can improve the palatability of the composition and promote the absorption and utilization of fat-soluble vitamins in the intestine. The DL-propargylglycine in the invention is a non-protein L-α-amino acid. After being added in an appropriate amount, it can be used as a raw material to synthesize organic compounds such as drugs, hormones, antibiotics and amino acids in the pig body, and reduce the contact reaction between sulfur and hydrogen. DL-propargylglycine can also be used as a synergist to promote nutrient absorption, increase the absorption rate of sulfur in the pig body, reduce the total amount of sulfur entering the pig excrement, and reduce the subsequent generation of hydrogen sulfide. The addition of an appropriate amount of methionine component can improve the growth and development of pigs, promote protein synthesis and cell proliferation, help improve the meat quality of pigs, and improve economic benefits. Methionine can also improve the immunity of pigs. The invention can improve the pig's ability to absorb carbohydrates in the composition, reduce the synthesis of hydrogen sulfide by hydrogen and sulfur in the feed, and further reduce the generation and emission of hydrogen sulfide; the horseshoe crab antimicrobial peptide in the invention is a good natural active ingredient, which has the effects of clearing heat, removing dampness and inhibiting bacteria, and can increase the resistance of pigs after being added; the added krill freeze-dried powder contains more than 50% protein and a full range of amino acids, which is helpful to promote pig cell growth, tissue repair and metabolism; the krill freeze-dried powder also contains a large amount of unsaturated fatty acids, which can enhance the pig's immunity and environmental stress resistance after being added, help the pig to absorb and utilize various nutrients in the composition, reduce the excretion of sulfur, and further reduce the generation and emission of hydrogen sulfide;The invention provides a proper amount of Saccharomyces boulardii powder component, which can regulate the immune response in pigs, improve intestinal health, prevent and treat diarrhea, and reduce the generation of hydrogen sulfide gas; the invention provides a proper amount of xylooligosaccharide component, which can effectively improve the digestive tract flora of pigs, promote the growth of beneficial bacteria in the digestive tract, inhibit the reproduction of harmful microorganisms, and improve the body's resistance. The xylooligosaccharide molecules have a similar structure to the receptors on the intestinal endothelial cells of harmful microorganisms in the intestine, and can be combined with certain toxins, viruses and fungal cell surfaces as adjuvants for these exogenous antigens, slow down the absorption of antigens, increase the antigen titer, and thus enhance the animal's somatic cell and humoral immune response; the invention provides a proper amount of xylooligosaccharide component, which can effectively improve the digestive tract flora of pigs, promote the growth of beneficial bacteria in the digestive tract, inhibit the reproduction of harmful microorganisms, and improve the body's resistance. The composition formed after the components are compounded provides rich protein and amino acids for pig growth. The addition of various organic compounds and trace elements improves the overall taste and nutritional value of the feed composition. After consumption, it can greatly improve the immunity and disease resistance of pigs, promote the digestion and absorption of various nutrients in the composition by pigs, reduce the excretion of sulfur in the growth and development of pigs, and thus reduce the generation and emission of sulfur-containing compounds such as hydrogen sulfide; it also reduces the residual amount of unabsorbed protein, peptides and amino acids in feces, thereby reducing the direct source of hydrogen sulfide gas produced by subsequent microbial decomposition of feces, and ensures the good growth and development of pigs. ;

[0009] Preferably, the following components are included by weight:

[0010] 850-1150 parts of wheat, 650-750 parts of soybean meal, 550-650 parts of rice bran, 300-500 parts of sorghum dry alcohol grains, 350-450 parts of cassava grains, 8-17 parts of oil powder, 3-7 parts of cottonseed meal, 7-11 parts of peanut kernel meal, 35-55 parts of DL-propargylglycine, 0.8-1.8 parts of feed salt, 0.1-0.2 parts of betaine, 0.02-0.05 parts of horseshoe crab antibacterial peptide, 2-8 parts of boulardii yeast powder, 15-30 parts of xylo-oligosaccharides, 1.5-3.5 parts of krill freeze-dried powder, 0.06-0.12 parts of methionine, and 1-2 parts of choline chloride.

[0011] Preferably, the following components are included by weight:

[0012] 850-1150 parts of wheat, 650-750 parts of soybean meal, 550-650 parts of rice bran, 300-500 parts of sorghum dry alcohol grains, 350-450 parts of cassava grains, 8-17 parts of oil powder, 3-7 parts of cottonseed meal, 7-11 parts of peanut kernel meal, 35-55 parts of DL-propargylglycine, 0.8-1.8 parts of feed salt, 0.1-0.2 parts of betaine, 0.02-0.05 parts of horseshoe crab antibacterial peptide, 2-8 parts of boulardii yeast powder, 15-30 parts of xylo-oligosaccharides, 1.5-3.5 parts of krill freeze-dried powder, 0.06-0.12 parts of methionine, and 1-2 parts of choline chloride.

[0013] Preferably, the following components are included by weight:

[0014] 900-1100 parts of wheat, 670-730 parts of soybean meal, 580-620 parts of rice bran, 350-450 parts of sorghum dry alcohol grains, 370-430 parts of cassava grains, 10-15 parts of oil powder, 4-6 parts of cottonseed meal, 8-10 parts of peanut kernel meal, 40-50 parts of DL-propargylglycine, 1-1.5 parts of feed salt, 0.1-0.2 parts of betaine, 0.03-0.04 parts of horseshoe crab antibacterial peptide, 3-7 parts of boulardii yeast powder, 20-25 parts of xylo-oligosaccharides, 2-3 parts of krill freeze-dried powder, 0.08-0.1 parts of methionine, and 1.2-1.8 parts of choline chloride.

[0015] Preferably, the following components are included by weight:

[0016] 950-1050 parts of wheat, 690-710 parts of soybean meal, 590-610 parts of rice bran, 380-420 parts of sorghum dry alcohol grains, 390-410 parts of cassava grains, 11-14 parts of oil powder, 4-6 parts of cottonseed meal, 8-10 parts of peanut kernel meal, 40-50 parts of DL-propargylglycine, 1-1.5 parts of feed salt, 0.1-0.2 parts of betaine, 0.03-0.04 parts of horseshoe crab antibacterial peptide, 4-6 parts of boulardii yeast powder, 21-24 parts of xylo-oligosaccharides, 2-3 parts of krill freeze-dried powder, 0.08-0.1 parts of methionine, and 1.4-1.6 parts of choline chloride.

[0017] Preferably, the following components are included by weight:

[0018] 1000 parts of wheat, 700 parts of soybean meal, 600 parts of rice bran, 400 parts of sorghum dry alcohol grains, 400 parts of cassava grains, 12 parts of oil powder, 5 parts of cottonseed meal, 9 parts of peanut kernel meal, 45 parts of DL-propargylglycine, 1.2 parts of feed salt, 0.15 parts of betaine, 0.04 parts of horseshoe crab antibacterial peptide, 5 parts of boulardii yeast powder, 22 parts of xylo-oligosaccharides, 2.5 parts of krill freeze-dried powder, 0.09 parts of methionine, and 1.5 parts of choline chloride.

[0019] The second technical solution of the present invention: a method for preparing a composition for reducing hydrogen sulfide emissions during pig breeding, comprising the following steps:

[0020] (I) placing appropriate amounts of wheat, soybean meal, rice bran, cottonseed meal and peanut kernel meal in a grinding hopper and grinding them to obtain a grinding material;

[0021] (II) feeding the crushed material in step (I) into a first mixing chamber;

[0022] (III) placing appropriate amounts of sorghum dry alcohol grains and cassava wine grains into the first mixing chamber of step (II) through a first feeding hopper and mixing to obtain a mixed initial material;

[0023] (IV) injecting distilled water into the mixed initial material of step (III) through the water inlet pipe (2015), and stirring and mixing to obtain a mixed liquid material;

[0024] (V) sending the mixed liquid material of step (IV) into a concentration chamber for heating, stirring and concentration to obtain a concentrated material;

[0025] (VI) freeze-crushing and drying the concentrated material in step (V) to obtain a freeze-dried crushed material;

[0026] (VII) feeding the freeze-dried crushed material in step (VI) into a second mixing chamber through a material guide device, adding appropriate amounts of feed salt, betaine and choline chloride into the second mixing chamber through a second feed hopper, and grinding and mixing them together to obtain a ground mixed material;

[0027] (VIII) passing the ground mixed material in step (VII) through a vibrating screen and then feeding it into a discharge chamber;

[0028] (IX) adding appropriate amounts of oil powder, krill freeze-dried powder, DL-propargylglycine, horseshoe crab antimicrobial peptide, Saccharomyces boulardii powder, xylo-oligosaccharides and methionine into the discharge chamber of step (VIII) to obtain a nutrient mixture;

[0029] (X) The nutrient mixture in step (IX) is air-dried by a hot air blower, and the air-dried dry powder is sent out and collected to obtain a finished composition.

[0030] The invention firstly grinds large-particle raw materials such as wheat, soybean meal, rice bran, cottonseed meal and peanut kernel meal in a grinding hopper, which is convenient for subsequent processing and uniform mixing with other materials, and also convenient for pigs to more fully absorb the nutrients therein; sorghum dry alcohol grains and cassava wine grains are continuously added through the first feeding hopper, and are placed in the first mixing chamber together with the ground materials, and water is added for mixing, so that the raw materials can be fully mixed, which is convenient for subsequent continuous processing; the mixed liquid material is sent to the concentration chamber for heating, stirring and concentration, so that the effective components in the raw materials can be fully dissolved in water and then mixed, so as to obtain an effective mixed material that can be more easily absorbed by pigs; the concentrated material is frozen, crushed and dried, which is convenient for good mixing with the raw materials, and at the same time ensures the activity of the effective components; the invention smoothly sends the freeze-dried crushed material into the second mixing chamber through the material guiding device, and then adds feed salt, betaine and choline chloride raw materials and grinds them together to obtain a ground mixed material with uniform and fine particles, better taste, good edibility, and can be more fully absorbed by pigs; the ground mixed material is continuously sent to the discharge chamber after passing through the vibrating screen, so as to further ensure the quality of the ground mixed material. The particle size of the mixed substance is guaranteed, and the appearance of the final feed composition is guaranteed, which is more beneficial to pigs; oil powder, krill freeze-dried powder, DL-propargyl glycine, horseshoe crab antimicrobial peptide, boulardii yeast powder, oligoxylose and methionine, which are fine-grained nutritional additives, are continuously added into the discharge cavity, mixed and air-dried, and finally a nutrient-rich, uniform-sized and high-quality feed composition product is obtained, which is more conducive to the digestion and absorption of various nutrients by pigs, reduces the residual amount of unabsorbed protein, polypeptide and amino acid in feces, and further reduces the direct source of hydrogen sulfide gas generated by subsequent fecal microbial decomposition, thereby ensuring the good growth and development of pigs; the whole preparation process of the present invention is complete, the raw materials are added in three stages according to the requirements, the raw materials to be treated are specially treated, and the overall treatment adopts physical methods, which ensures the original activity of the effective components in each raw material, avoids the change and loss of the active components in the raw material, and finally obtains a nutrient-rich, pig-absorbable feed composition product that can effectively reduce hydrogen sulfide emissions and subsequent regeneration, and can be produced and used in batches.

[0031] Preferably, the material-liquid ratio of the mixed initial material to distilled water in step (IV) is 1:1.5 to 3. More preferably, the material-liquid ratio of the mixed initial material to distilled water in step (IV) is 1:2 to 2.5. The material-liquid ratio is limited so that the raw materials can be fully dissolved and mixed to form a mixed liquid material, and the added raw materials can be well and homogeneously dissolved.

[0032] Preferably, the concentration temperature in step (V) is 60°C to 85°C. More preferably, the concentration temperature in step (V) is 65°C to 80°C. More preferably, the concentration temperature in step (V) is 70°C to 75°C. The limited concentration temperature ensures that the water is removed smoothly without destroying the effective ingredients.

[0033] Preferably, the moisture content of the concentrated material in step (V) is 15% to 20%. The limited moisture content is removed by subsequent more effective freeze-drying to avoid the influence of temperature concentration on the activity of the effective components.

[0034] Preferably, the freeze-drying temperature in step (VI) is -10°C to 0°C. More preferably, the freeze-drying temperature in step (VI) is -8°C to -2°C. The freeze-drying temperature in step (VI) is -6°C to -4°C. The limited freeze-drying temperature protects the activity of the effective ingredient while ensuring that the water therein is fully freeze-dried and removed.

[0035] Preferably, the freeze drying time in step (VI) is 1.5 h to 3 h. More preferably, the freeze drying time in step (VI) is 2 h to 2.5 h. The limited freeze drying time can reduce the moisture content to the required range of 5% to 8%, while taking into account timeliness.

[0036] Preferably, the mesh size of the vibrating screen is 0.5 mm to 1.5 mm. More preferably, the mesh size of the vibrating screen is 0.8 mm to 1.2 mm. More preferably, the mesh size of the vibrating screen is 1 mm. The vibrating screen with a limited aperture can obtain particles that are finer, better in quality, and easier to be digested and absorbed by pigs, which can maximize the digestion and absorption effect and improve the energy conversion of nutrients in pigs.

[0037] Preferably, the air-drying temperature in step (X) is 45° C. to 60° C. More preferably, the air-drying temperature in step (X) is 50° C. to 55° C. The defined air-drying temperature is used to finally dry the feed composition product to be formed. The gentle drying method and drying temperature ensure that the final feed composition product has a good storage effect and will not be damp and agglomerated.

[0038] Preferably, the preparation of the krill freeze-dried material comprises the following steps:

[0039] (A01) taking fresh Antarctic krill, cleaning and deshelling the krill to obtain krill meat;

[0040] (A02) adding water to the krill meat prepared in step (A01), heating and grinding the krill meat to obtain a ground material;

[0041] (A03) centrifuging the ground material in step (A02) to obtain a centrifuged meat material and a centrifuged liquid material;

[0042] (A04) adding activated carbon to the centrifuged liquid in step (A03) for decolorization and filtering to obtain a decolorized liquid;

[0043] (A05) mixing the decolorized liquid of step (A04) and the centrifuged meat material of step (A03) in a ratio of 1:3 to 5, and beating the mixture to obtain a slurry;

[0044] (A06) stirring the slurry in step (A05) at a temperature of 70° C. to 85° C. and a pressure of 2.0 MPa to 4.0 MPa for 45 to 90 minutes to obtain a meat paste;

[0045] (A07) eluting the meat paste in step (A06) with 10% to 15% anhydrous ethanol to obtain a purified material;

[0046] (A08) The purified material in step (A07) is centrifuged and freeze-dried to obtain a krill freeze-dried material.

[0047] The krill meat is hot-ground by adding water, so that the effective ingredients in the krill meat are fully extracted and ground into finer particles; the ground material is separated into centrifugal meat material and centrifugal liquid material, which is conducive to subsequent reprocessing; the colored suspended impurities in the centrifugal liquid material can be well removed by activated carbon adsorption, and the purity of the centrifugal liquid material is fully guaranteed; the decolorized liquid and the centrifugal meat material are mixed and beaten in proportion to obtain a slurry material with rich nutrition, good purity and fine particles; the slurry material is stirred at a limited temperature and pressure to obtain a nutritious and evenly mixed meat paste material; the meat paste material is eluted with anhydrous ethanol to remove organic impurities and further improve the purity; the final krill freeze-dried material is obtained by centrifugation and freeze-drying, which has the characteristics of good purity and no loss of nutritional activity; the method can extract protein and chitin in krill meat to the greatest extent, and finally obtain a krill freeze-dried material with good purity and excellent quality, which can be added to the feed composition to supplement the nutritional integrity, better promote the growth of pigs and the full absorption of nutrients.

[0048] Preferably, the material-liquid ratio in step (A02) is 1:5 to 20. More preferably, the material-liquid ratio in step (A02) is 1:10 to 15. The limited material-liquid ratio can fully dissolve the fine nutrient particles formed after grinding in hot water.

[0049] Preferably, the heating temperature in step (A02) is 40°C to 60°C. More preferably, the heating temperature in step (A02) is 45°C to 55°C. The heating temperature in step (A02) is 50°C. The limited heating temperature can improve the grinding efficiency and better promote the dissolution of fine nutrient particles in water.

[0050] Preferably, in the step (A05), the decolorized liquid and the centrifuged meat are mixed and slurried in a ratio of 1:4.

[0051] Preferably, the stirring temperature in step (A06) is 75° C. to 80° C. The limited stirring temperature can evaporate the water well, concentrate the slurry well, and quickly concentrate the effective ingredients of the krill meat.

[0052] Preferably, the stirring pressure in step (A06) is 2.5 MPa to 3.5 MPa. More preferably, the stirring pressure in step (A06) is 3 MPa. The limited stirring pressure can achieve better homogenous mixing, achieve good concentration of effective ingredients in krill meat, and finally obtain a meat paste of good quality.

[0053] Preferably, the stirring time in step (A06) is 50 min to 85 min. More preferably, the stirring time in step (A06) is 55 min to 80 min. The stirring time in step (A06) is 60 min to 75 min. More preferably, the stirring time in step (A06) is 65 min to 70 min. The limited stirring time ensures good concentration and good concentration of the effective ingredients of the krill meat while taking into account the timeliness.

[0054] Preferably, the freeze drying temperature in step (A08) is -10°C to 0°C. More preferably, the freeze drying temperature in step (A08) is -8°C to -2°C. More preferably, the freeze drying temperature in step (A08) is -6°C to -4°C. The defined freeze drying temperature can ensure good drying and protect the activity of the active ingredients in the krill freeze-dried powder.

[0055] Preferably, the freeze drying time in step (A08) is 1.5 h to 3 h. More preferably, the freeze drying time in step (A08) is 2 h to 2.5 h. The limited freeze drying time can ensure sufficient drying to obtain a krill freeze-dried material of good quality.

[0056] The third technical solution of the present invention: a composition preparation device for reducing hydrogen sulfide emissions during pig breeding, comprising a shell, a first feed hopper and a crushing feed hopper are provided on the top of the shell; the first feed hopper and the crushing feed hopper are connected to a first mixing chamber, a first stirring device is provided in the first mixing chamber; the bottom of the first mixing chamber is connected to a concentrating chamber through a first discharge pipe, a heater and a cooler are provided in the concentrating chamber, and a second stirring device is rotatably provided in the concentrating chamber; the bottom of the concentrating chamber is connected to a funnel-shaped material guide chamber through a fan-shaped discharge hole; the bottom of the funnel-shaped material guide chamber is connected to a second mixing chamber through a material guide pipe, a bow-shaped grinding chamber is rotatably provided in the second mixing chamber, a multi-layer grinding device is rotatably provided in the bow-shaped grinding chamber, each grinding layer of the multi-layer grinding device corresponds to each grinding layer of the bow-shaped grinding chamber; a vibrating screen is provided at the bottom of the second mixing chamber; the bottom of the second mixing chamber is connected to a discharge chamber. The first feeding hopper in the present invention is used to smoothly add sorghum dry alcohol grains and cassava wine grains raw materials into the first mixing chamber; the crushing feeding hopper is used to add wheat, soybean meal, rice bran, cottonseed meal and peanut kernel meal raw materials and then crush them; the first stirring device is used to fully mix and dissolve the added raw materials in water; the first feeding pipe is used to smoothly send the mixed liquid into the concentration chamber; the concentration chamber provides a processing environment for the reprocessing of the mixed liquid; the heater is used to heat and concentrate the mixed liquid; the cooler is used to freeze-dry the concentrated material; the second stirring device is used for good concentration and sufficient freeze-crushing and drying of the mixed liquid; the fan-shaped feeding hole in the present invention is used to fully and completely send the freeze-dried crushed material into the funnel-shaped guide chamber; the funnel-shaped guide chamber and the guide pipe are used to smoothly guide the freeze-dried crushed material into the second mixing chamber; the bow-shaped grinding chamber cooperates with the multi-layer grinding device to mix the entered freeze-dried crushed material and the added feed salt, betaine and The choline chloride raw material is fully ground and mixed; the vibrating screen is used to ensure the appearance of the final feed composition, which is in a form that is more beneficial to pigs; the discharge cavity is used to process the final mixing of the main raw material components and the accessories to obtain a nutritious feed composition product that is beneficial to pigs' absorption and can effectively reduce hydrogen sulfide emissions and subsequent regeneration; the present invention adopts a vertical multi-layer tower setting as a whole, which can guide the materials from top to bottom by gravity, and each raw material is respectively subjected to water-soluble stirring, evaporation concentration, freeze drying, multi-stage grinding, screening and returning materials, and air-drying and mixing from top to bottom, so as to achieve good processing and mixing of each component material, and the overall processing adopts a physical method to ensure the original activity of the effective ingredients in each raw material material, avoid the change and loss of the active ingredients in the raw material material, and finally obtain a nutritious feed composition product that is beneficial to pigs' absorption and can effectively reduce hydrogen sulfide emissions and subsequent regeneration, which can be produced and used in batches.

[0057] Preferably, a sealing cover is provided on the top of the housing, and the first feed hopper and the crushing feed hopper are arranged on the sealing cover. The sealing cover provides an installation position for the first feed hopper and the crushing feed hopper, and can also prevent non-raw material debris from falling into the first mixing chamber.

[0058] Preferably, the bottom of the first feed hopper is connected to the first mixing chamber; the top of the crushing feed hopper is provided with a crushing feed port (1031), and the bottom of the crushing feed hopper is connected to the first mixing chamber. The crushing feed port is used for adding raw materials that need to be crushed, such as wheat, soybean meal, rice bran, cottonseed meal and peanut kernel meal; the first feed hopper and the crushing feed hopper are used to add the added raw materials separately or after processing, so that the materials entering the first mixing chamber can be better mixed, thereby improving the quality of the finished product.

[0059] Preferably, the first feed hopper includes a feed hopper body, the bottom of which is connected to the first mixing chamber, and the top of which is provided with a first feed port; a support frame is provided inside the feed hopper body, and a plurality of partition plates are provided between the support frame and the inner wall of the feed hopper body, and the plurality of partition plates divide the interior of the feed hopper body into a corresponding number of discharge chambers, and an inclined discharge plate is movably provided at the bottom of the discharge chamber. The first feed port is used for adding sorghum dry alcohol grains and cassava wine grains raw materials; different discharge chambers are used to hold different types of raw materials; the inclined discharge plate is used to open and close the bottom of the discharge chamber, and when discharge is required, the raw materials can slide down along the inclined discharge plate into the first mixing chamber, and when discharge is not required, the inclined discharge plate blocks the raw materials in the corresponding discharge chamber, which has good flexibility.

[0060] Preferably, a feeding flap is hingedly connected to the first feeding port, and the feeding flap can prevent debris from falling into the feeding chamber.

[0061] Preferably, a multi-chamber hydraulic cylinder is provided on the support frame, and a plurality of push rods are slidably provided on the support frame, the plurality of push rods correspond to the chambers of the multi-chamber hydraulic cylinder, one end of the push rod is connected to the piston end at the corresponding chamber, and one end of the push rod away from the multi-chamber hydraulic cylinder is connected to the corresponding inclined blanking plate. The multi-chamber hydraulic cylinder and the plurality of push rods cooperate to intelligently control the inclined blanking plate to open and close the corresponding blanking chamber.

[0062] Preferably, the downward inclination angle of the inclined feeding plate is 15 to 60 degrees. The downward inclination angle of the inclined feeding plate is 20 to 55 degrees. More preferably, the downward inclination angle of the inclined feeding plate is 25 to 50 degrees. More preferably, the downward inclination angle of the inclined feeding plate is 30 to 45 degrees. More preferably, the downward inclination angle of the inclined feeding plate is 35 to 40 degrees. The limited downward inclination angle can ensure that when material is required, the raw materials can slide into the first mixing chamber sufficiently and quickly. The first feeding hopper realizes the separate addition of multiple materials through the partition plate, and controls the addition amount of a single material through the multi-chamber hydraulic cylinder to improve the feeding accuracy.

[0063] Preferably, the crushing hopper comprises a crushing shell, the bottom of which is connected to the first mixing chamber, and a pair of crushing assemblies with adjustable relative spacing are arranged in parallel in the crushing shell. The pair of crushing assemblies with adjustable relative spacing are arranged in parallel to achieve good crushing of large-particle raw materials, and the size of the crushed particles can be controlled by adjusting the distance between the crushing assemblies.

[0064] Preferably, the pulverizing shell is provided with a first guide groove and a second guide groove, a group of first guide sliders are provided in the first guide groove for relative sliding movement, a group of second guide sliders are provided in the second guide groove for relative sliding movement, one pulverizing component is rotatably provided on a corresponding group of first guide sliders and second guide sliders, and another pulverizing component is rotatably provided on a corresponding group of first guide sliders and second guide sliders. The cooperation among the first guide groove, the second guide groove, the first guide slider and the second guide slider can well realize the stable adjustment of the distance between the two pulverizing components.

[0065] Preferably, a group of first guide sliders are connected by a screw rod, and a group of first guide sliders are respectively connected to the screw rod by reverse threading. The crushing shell is provided with a first stepping motor, and the driving end of the first stepping motor is connected to one end of the screw rod; a group of second guide sliders are provided with a first rotating motor, and the driving end of the first rotating motor is connected to one end of the rotating rod of the corresponding crushing assembly away from the first stepping motor. The screw rod can realize the precise adjustment of the distance between the two crushing assemblies; the first rotating motor provides power for the crushing between the two crushing assemblies.

[0066] Preferably, the pulverizing assembly comprises a rotating rod, both ends of which are rotatably arranged on a corresponding set of first guide sliders and second guide sliders, the rotating rod is provided with a grinding roller, and the grinding roller is provided with a plurality of rows of grinding teeth. The engagement between the grinding teeth can achieve good pulverization of large-particle raw materials.

[0067] Preferably, the grinding teeth on the two grinding rollers mesh with each other. The large-particle solid raw materials are ground into small-particle materials by the crushing hopper, which can achieve full mixing of the large-particle raw materials and the small-particle raw materials entering the first hopper, thereby improving the uniformity of the finished product of the preliminary mixed raw materials; the first guide slider and the second guide slider are driven by the screw rod and the first stepper motor to move synchronously in the first guide groove and the second guide groove, which can quickly change the distance between the grinding rollers and crush large-particle raw materials of various particle sizes into small-particle raw materials of required sizes.

[0068] Preferably, the first stirring device comprises a first driving motor, the first driving motor is arranged on the top of the housing, a stirring rod is arranged at the driving end of the first driving motor, the stirring rod passes through the housing and is rotatably arranged in the first mixing chamber, and a plurality of flat stirring blades are arranged on the stirring rod. The plurality of flat stirring blades can achieve full mixing and dissolution of the raw materials in water.

[0069] Preferably, a water inlet hole is provided at the upper part of the first mixing chamber, a water inlet pipe is inserted into the water inlet hole, a water flow meter is provided on the water inlet pipe, and a water inlet pump is connected to the end of the water inlet pipe away from the water inlet hole. The water inlet pump is used to accurately add external water into the first mixing chamber as required.

[0070] Preferably, a first discharge solenoid valve is provided on the first discharge pipe. Through the intelligent control of the first discharge solenoid valve, the mixed liquid material is sent to the concentration chamber for heating, stirring and concentration without manual intervention. The stirring rod is driven to rotate by the first drive motor, and water is pressed into the first mixing chamber by the water inlet pump to mix and stir with the raw materials entering the first mixing chamber to form a mixed liquid material. The flat stirring blade can increase the contact area between the stirring blade and the mixed liquid material during the rotation process, so that the raw materials are more evenly and fully dissolved in the water, thereby improving the mixing uniformity.

[0071] Preferably, a thermometer is connected to the concentration chamber. The thermometer can monitor the temperature in the concentration chamber in real time, thereby controlling the working conditions of the heater and the cooler. The thermometer is electrically connected to the heater and the cooler in the concentration chamber, monitors in real time and links the heater or the cooler to concentrate and freeze-dry the mixed liquid entering the concentration chamber, and discharges the water vapor generated during the concentration process through the exhaust pipe.

[0072] Preferably, the second stirring device includes a second drive motor, the second drive motor is arranged at the bottom of the concentration chamber, the drive end of the second drive motor is provided with a second stirring rod, the second stirring rod is rotatably arranged inside the concentration chamber, a plurality of stirring blades are provided on the second stirring rod, a plurality of material-digging plates are provided on the second stirring rod, and the material-digging plates are in contact with the bottom surface of the concentration chamber; a fan-shaped discharge hole is provided at the bottom of the concentration chamber, and a fan-shaped discharge valve is rotatably provided at the fan-shaped discharge hole. The stirring blades and the material-digging plates can fully stir the mixed liquid material during heating and concentration, so as to achieve a faster concentration effect; the stirring blades can also cut the material during stirring, and when it comes to the freeze-drying stage, a freeze-dried crushed material with a smaller particle size can be obtained by stirring and cutting; the material-digging plate rotates close to the bottom surface of the concentration chamber, and when the fan-shaped discharge hole is opened, the material-digging plate can dig the freeze-dried crushed material as completely as possible without any residue, and drop it from the fan-shaped discharge hole.

[0073] Preferably, the material-dividing plate includes a first material-dividing plate and a second material-dividing plate, wherein the length of the first material-dividing plate is the same as the bottom radius of the concentration chamber, and the length of the second material-dividing plate is 1 / 3 to 1 / 2 of the length of the first material-dividing plate. The first material-dividing plate and the second material-dividing plate with limited lengths can achieve full stirring of the material on the one hand, and on the other hand, can move the freeze-dried crushed material in the concentration chamber to the fan-shaped discharge hole as completely as possible without any residue.

[0074] Preferably, the fan-shaped discharge hole is a structure extending outward from the center of the concentration chamber, which can ensure that the freeze-dried crushed material falls into the second mixing chamber more smoothly.

[0075] The second driving motor drives the second stirring rod to rotate, and the stirring blade on the second stirring rod can cut the concentrated block raw materials into freeze-dried crushed materials of uniform size. The cut freeze-dried crushed materials are accumulated at the bottom of the concentration chamber, and the freeze-dried crushed material particles at the bottom of the concentration chamber are horizontally moved to the fan-shaped discharge hole and sent out of the concentration chamber by the first and second material transfer plates; the fan-shaped discharge hole can smoothly and completely deliver the freeze-dried crushed material particles to the second mixing chamber, thereby reducing the accumulation of materials at the bottom of the concentration chamber.

[0076] Preferably, the fan-shaped discharge valve includes a swing motor, which is arranged at the bottom of the concentration chamber, and a fan-shaped sealing plate is provided at the driving end of the swing motor, and the fan-shaped sealing plate cooperates with the fan-shaped discharge hole. The fan-shaped sealing plate cooperates with the fan-shaped discharge hole, and the swing motor is intelligently controlled to work as needed, and the fan-shaped sealing plate is opened to send the freeze-dried crushed material in the concentration chamber into the second mixing chamber through the fan-shaped discharge hole.

[0077] Preferably, an air outlet pipe is provided on one side of the concentration chamber, the air outlet pipe penetrates the shell and extends to the outside of the shell, and an air outlet valve is provided on the air outlet pipe. When heating and concentrating, the air outlet valve is opened, and water vapor and other gases are discharged to the outside through the air outlet pipe.

[0078] Preferably, the portion of the air outlet pipe located outside the shell is tilted upward at an angle of 30 to 45 degrees. More preferably, the portion of the air outlet pipe located outside the shell is tilted upward at an angle of 35 to 40 degrees.

[0079] Preferably, a material guiding device is rotatably provided at the bottom of the funnel-shaped material guiding chamber, and the material guiding device is rotatably fitted with the inner wall surface of the funnel-shaped material guiding chamber. The material guiding device can smoothly and completely guide the freeze-dried and crushed material dropped from the fan-shaped material discharge hole into the funnel-shaped material guiding chamber into the second mixing chamber.

[0080] Preferably, the material guide device includes a double-headed motor, the inner wall of the material guide tube is provided with a support cross bar, the double-headed motor is arranged on the support cross bar, the double-headed motor is provided with a mounting rod near the first driving end of the funnel-shaped material guide cavity, a scraper row is provided on the mounting rod, and the scraper row rotates and fits with the inner wall surface of the funnel-shaped material guide cavity. The support cross bar stably supports the double-headed motor in the material guide tube; one end of the double-headed motor drives the scraper row to rotate in contact with the inner wall surface of the funnel-shaped material guide cavity, so that the freeze-dried and crushed materials that fall into the funnel-shaped material guide cavity slide smoothly to the second mixing cavity, avoiding the freeze-dried and crushed materials from adhering to the wall surface of the funnel-shaped material guide cavity and causing material waste.

[0081] Preferably, the scraper row has a structure with a gradually decreasing width toward the mounting rod. The scraper row with a limited structure can better scrape the freeze-dried crushed material that falls into the funnel-shaped material guide chamber into the second mixing chamber.

[0082] Preferably, an annular groove is provided at the top of the second mixing chamber, the annular groove is located outside the material guide tube, an annular rotating tooth row is rotatably provided in the annular groove, and the bow-shaped grinding chamber is connected to the annular rotating tooth row. The annular groove provides an installation position for the stable rotation of the annular rotating tooth row; the annular rotating tooth row can well receive the external driving force to drive the bow-shaped grinding chamber to rotate, and well realize the grinding process.

[0083] Preferably, the second driving end of the double-headed motor is connected to a vertical rotating rod, a first bevel gear is provided on the vertical rotating rod, and a second bevel gear is meshed on the first bevel gear; a connecting sleeve is rotatably provided on the vertical rotating rod, a transverse rotating rod is provided on the connecting sleeve, the second bevel gear is arranged at one end of the transverse rotating rod, and a first driving gear is fixed at one end of the transverse rotating rod away from the double-headed motor, and the first driving gear is meshed with an annular rotating gear row. The vertical rotating rod can well drive the first bevel gear to rotate, the first bevel gear meshes to drive the second bevel gear to rotate, and the annular rotating gear row is continuously driven to rotate in the annular slot through the transverse rotating rod and the first driving gear, so as to smoothly realize the grinding process. The two ends of the double-headed motor respectively control the material guiding device and the multi-layer grinding device, which can ensure the synchronous rotation of the material guiding device and the multi-layer grinding device, and ensure the subsequent grinding efficiency; the oblique design of the scraper row can scrape the material on the material guiding device into the second mixing chamber to the maximum extent; the multi-layer grinding device is driven to rotate by the double-headed motor, and at the same time, the annular rotating gear row is engaged with the first driving gear, thereby driving the bow-shaped grinding chamber to rotate. The rotation direction of the multi-layer grinding device is opposite to that of the bow-shaped grinding chamber, so that the material grinding process inside the second mixing chamber is in a double speed state, ensuring good grinding processing efficiency.

[0084] Preferably, the bow-shaped grinding chamber is provided with several layers of grinding cavities from top to bottom, and a grinding platform is formed at the bottom of each layer of grinding cavity. The grinding platform is provided with several strip-shaped discharge holes, and the upper strip-shaped discharge holes correspond to the grinding platform of the adjacent lower layer; the grinding platform rotates in coordination with the multi-layer grinding device. The grinding part of the multi-layer grinding device rotates in the corresponding grinding cavity, and the grinding platform cooperates with the grinding part of the grinding device to achieve a good grinding process for the material; the strip-shaped discharge holes are used to allow the material on the corresponding grinding platform to fall to the next layer of grinding platform for further grinding; the upper strip-shaped discharge holes correspond to the adjacent lower layer of grinding platforms in order to achieve multi-layer grinding from top to bottom and ensure a fine grinding effect. The strip-shaped discharge holes on the grinding platform enable the material being processed on the current grinding platform to enter the next layer of grinding platform through the strip-shaped discharge holes for further grinding during the grinding process, so that the material is fully ground and processed.

[0085] Preferably, the strip-shaped discharge hole extends toward the multi-layer grinding device, so that the ground abrasives of the current layer can smoothly fall to the next layer of grinding platform for further grinding.

[0086] Preferably, the first bevel gear is located in the connecting sleeve, and the connecting sleeve is provided with an anti-sticking layer. The connecting sleeve can protect the first bevel gear and the second bevel gear, and prevent the material from falling to the first bevel gear and the second bevel gear to affect the rotation process, and also avoid material waste; the anti-sticking layer can ensure that the material falling on the connecting sleeve slides smoothly into the bow-shaped grinding chamber, and avoids the material from sticking to the connecting sleeve and causing waste.

[0087] Preferably, the multi-layer grinding device comprises a main shaft, the end of which is connected to a vertical rotating rod, and a plurality of first driving rods are arranged on the main shaft, and a grinding rod is rotatably sleeved on the first driving rod, and the grinding rod rotates relative to the grinding platform. The first driving rod drives the grinding rod to rotate relative to the grinding platform, so as to realize the grinding process well.

[0088] Preferably, the length of the grinding rod is the same as the depth of the grinding platform. The grinding rod of limited length can fully and comprehensively grind the material on the grinding platform.

[0089] Preferably, a connection seat is provided at the connection between the main shaft rod and the vertical rotating rod, and an inclined material discharge guide plate is provided on the connection seat, and the end of the inclined material discharge guide plate away from the connection seat points to the surface of the top grinding platform. The inclined material discharge guide plate can smoothly guide the fallen materials to the top grinding platform for grinding.

[0090] Preferably, the main shaft is provided with a plurality of second driving rods, and the second driving rods are provided with grinding scrapers, and the grinding scrapers are in contact with the surface of the grinding platform of the corresponding layer. The second driving rod drives the grinding scrapers to rotate, and the materials on the corresponding grinding platform are well scraped to the strip-shaped discharge hole, and then fall to the next layer of grinding platform for further grinding.

[0091] Preferably, the length of the grinding scraper is the same as the depth of the grinding platform. The grinding scraper of limited length can fully scrape the grinding material on the current grinding platform to the strip-shaped discharge hole and drop it to the next grinding platform for further grinding.

[0092] Preferably, both sides of the vibration screen are provided with vibration motors, which drive the vibration screen to vibrate, thereby screening the abrasive particles well. The abrasive particles passing through the vibration screen are qualified products, and the abrasive particles that cannot pass through the vibration screen are unqualified products and need to be further ground.

[0093] Preferably, a pushing device is provided on the shell, and the pushing end of the pushing device is located below the bow-shaped grinding chamber in the second mixing chamber; a discharge channel is provided in the second mixing chamber, and the discharge channel is tilted downward, and the pushing end of the pushing device corresponds to the entrance of the discharge channel, and the outlet of the discharge channel extends outside the shell, and the outlet of the discharge channel is detachably connected to a collecting bucket. The pushing device pushes the larger particles that have not passed through the vibrating screen to the discharge channel, and the larger particles are collected by the collecting bucket and then sent back to the bow-shaped grinding chamber for further grinding.

[0094] Preferably, the pushing device comprises a hydraulic pushing rod arranged on the housing, the pushing end of the hydraulic pushing rod is telescopically arranged in the second mixing chamber, the pushing end of the hydraulic pushing rod is provided with a pushing row, the bottom of the pushing row is located in the same plane as the vibrating screen, and the pushing row corresponds to the entrance of the outlet channel. The hydraulic pushing rod provides a driving force for pushing the larger particles stranded in the vibrating screen; the pushing row smoothly pushes the larger particles stranded in the vibrating screen to the entrance of the outlet channel. The pushing device is at the bottom of the second grinding chamber, the bottom of the pushing device is at the same horizontal plane as the vibrating screen, the hydraulic pushing rod pushes the pushing row horizontally through the vibrating screen, and then sends the grinding particles that cannot pass through the vibrating screen into the outlet channel on the other side, sends the unqualified products into the collection bucket through the outlet channel for temporary collection, and pours the unqualified products into the second hopper through the detachable collection bucket and returns to the bow-shaped grinding chamber for re-grinding into qualified products.

[0095] Preferably, the push rod is a multi-stage hydraulic cylinder structure, and the push row is connected to the telescopic end of the multi-stage hydraulic cylinder. The multi-stage hydraulic cylinder can well drive the push row to smoothly push the larger particles trapped on the vibrating screen to the entrance of the outlet channel. When the pushing is completed, the multi-stage hydraulic cylinder drives the push row back to the starting position to prepare for the next pushing work.

[0096] Preferably, the pushing row includes a pushing platform, the pushing platform is connected to the telescopic end of the multi-stage hydraulic cylinder, and the two sides of the pushing platform are provided with extended flat rows through inclined sections. The extended flat rows cooperate with the pushing platform through the inclined sections, so that the larger particles retained on the vibrating screen can be pushed to the entrance of the outlet channel as completely and smoothly as possible.

[0097] Preferably, a material discharge through hole is provided on the top of the discharge cavity, and the material discharge through hole corresponds to the vibration screen. The material discharge through hole is used for qualified materials passing through the vibration screen to smoothly enter the discharge cavity.

[0098] Preferably, a hot air blower is provided on the top of the discharge chamber, and a circular arc-shaped discharge drawer is slidably provided in the discharge chamber, the air outlet of the hot air blower points to the inside of the circular arc-shaped discharge drawer, and a third stirring device is provided on the discharge chamber, and the stirring part of the third stirring device is located inside the circular arc-shaped discharge drawer. The gentle hot air of the hot air blower can gently dry the final material in the circular arc-shaped discharge drawer, so that the final feed composition has better quality; the circular arc-shaped discharge drawer is slidably provided in the discharge chamber, which is convenient for bagging the final prepared feed composition product; the third stirring device can fully and evenly stir the material added to the circular arc-shaped discharge drawer, and finally obtain a feed composition product with good uniformity. The hot air blower blows out hot air from top to bottom to air-dry the finished material entering the discharge chamber; the arc-shaped design of the discharge drawer is conducive to concentrating the finished material at the bottom of the arc for rapid collection; the third stirring device is used to fully mix the last added raw material with the ground material to improve the uniformity of the final product.

[0099] Preferably, the inner wall of the discharge cavity is provided with a chute, and the arc-shaped discharge tray is provided with a slider, which is slidably arranged in the chute. The cooperation between the slider and the chute enables the arc-shaped discharge tray to be smoothly pushed and pulled in the discharge cavity.

[0100] Preferably, the third stirring device includes a third swing motor, the third swing motor is arranged on the discharge chamber, the swing end of the third swing motor is provided with a third swing rod, the end of the third swing rod away from the third swing motor is connected to an elastic telescopic rod through a connecting end, the end of the elastic telescopic rod away from the connecting end is provided with a stirring rake, and the stirring rake contacts the bottom of the arc-shaped discharge drawer. The third swing motor drives the third swing rod to swing left and right, so that the stirring rake stirs the material in the arc-shaped discharge drawer well; the elastic telescopic rod makes the distance between the stirring rake and the bottom of the arc-shaped discharge drawer relatively movable, when the material in the arc-shaped discharge drawer is thicker, the elastic telescopic rod will shrink appropriately, and the stirring rake can fully stir the material in the arc-shaped discharge drawer through the elastic shrinkage of the elastic telescopic rod.

[0101] Preferably, a notch is provided at one end of the arc-shaped discharge drawer close to the third swing motor, and the third swing rod is rotatably arranged in the notch; a discharge handle is provided at one end of the arc-shaped discharge drawer away from the third swing motor. The notch is used to prevent the arc-shaped discharge drawer from colliding with the third swing motor during the process of pulling out and pushing in; the discharge handle is used for the operator to pull out and push the arc-shaped discharge drawer into the discharge cavity.

[0102] Preferably, the overall shape of the stirring rake is an arc. The defined stirring rake shape can be adapted to the shape of the arc-shaped discharge drawer, so as to achieve full stirring of the materials in the arc-shaped discharge drawer. The elastic telescopic rod can adjust the distance between the bottom of the stirring rake and the arc-shaped discharge drawer, and the third swing rod is driven to swing back and forth in the vertical direction by starting the third swing motor, so as to drive the stirring rake to perform a pendulum motion, so as to completely mix all the materials entering the arc-shaped discharge drawer; wherein the curvature of the inner surface of the arc-shaped discharge drawer slightly increases from the bottom center to both sides, and the curvature of the stirring rake remains unchanged from the center to both sides, so that the stirring rake can fit with the arc-shaped discharge drawer during the stirring process of the pendulum motion, thereby improving the stirring efficiency.

[0103] Preferably, the swing angle of the elastic telescopic rod is 30 to 40 degrees. The limited swing angle can enable the stirring rake to fully stir the materials in the arc-shaped discharge bin.

[0104] Preferably, the housing is provided with a second feed hopper, which is connected to the inside of the feed guide tube through a second oblique side feed pipe. The second feed hopper is used to add feed salt, betaine and choline chloride into the bow-shaped grinding chamber and grind them together with the freeze-dried crushed material; the second feed hopper is also used to add unqualified ground products back into the bow-shaped grinding chamber for re-grinding into qualified products.

[0105] Preferably, a third feed hopper is provided on the shell, and the third feed hopper is connected to the inner part of the discharge chamber through a third oblique side feed pipe, and one end of the third oblique side feed pipe away from the third feed hopper is located above the arc-shaped discharge drawer. The third feed hopper is used to add the oil powder, krill freeze-dried powder, DL-propargylglycine, horseshoe crab antimicrobial peptide, boulardii yeast powder, oligoxylose and methionine nutrient mixture into the arc-shaped discharge drawer, and mix and compound with the ground mixture passed through the vibrating screen to form the finished feed composition of the present invention.

[0106] Preferably, the overall structure of the second and third hoppers is the same as that of the first hopper. The second and third hoppers can add raw materials with different processing requirements into the processing process in batches to optimize the utilization rate of raw materials.

[0107] Preferably, the bottom of the housing is provided with supporting feet, which can provide stable support for the device during operation.

[0108] The present invention has the following beneficial effects:

[0109] (1) Wheat, soybean meal, rice bran, sorghum dry alcohol grains and cassava grains are the main additives in the composition, which can provide basic nutrients for pig growth. Sorghum dry alcohol grains and cassava grains can promote fermentation catalysis in the pig's body after eating feed, and reduce the production of hydrogen sulfide during the pig's digestion process;

[0110] (2) Cottonseed meal and peanut kernel meal as organic nutritional additives can further increase nutritional elements and better promote the growth and development of pigs; the addition of an appropriate amount of feed salt is used to supplement the salt content in the composition, and well maintain the electrolyte balance and normal physiological function of the pig's body; feed salt can increase the taste of the composition, stimulate the pig's taste, increase the pig's feed intake, help promote pig growth, increase meat production, and promote the secretion of pig digestive juices, improve the digestibility of the feed composition, reduce the sulfur residue in the excrement, and reduce the pig's hydrogen sulfide gas emissions; the addition of an appropriate amount of betaine can improve the palatability of the composition, increase the pig's feed intake, and better Promote pig growth; the addition of betaine can effectively maintain the vitamin potency in the composition and reduce the loss of nutrients in the composition during storage; the addition of an appropriate amount of choline chloride component can promote the reformation of amino acids, improve the utilization rate of amino acids in pigs, promote the decomposition and digestion of proteins, polypeptides and amino acids in the composition by pigs, reduce the residual amount of unabsorbed proteins, polypeptides and amino acids in feces, and thus reduce the direct source of hydrogen sulfide gas generated by subsequent fecal microbial decomposition; the addition of an appropriate amount of oil powder component can increase the fragrance and flavor of the composition and improve the palatability of the composition; promote the absorption and utilization of fat-soluble vitamins in the intestine;

[0111] (3) DL-propargylglycine is a non-protein L-α-amino acid. When added in appropriate amounts, it can be used as a raw material in the pig's body to synthesize organic compounds such as drugs, hormones, antibiotics and amino acids, thereby reducing the contact reaction between sulfur and hydrogen. DL-propargylglycine can also be used as a synergist to promote nutrient absorption, increase the absorption rate of sulfur in the pig's body, reduce the total amount of sulfur entering the pig's excrement, and reduce the subsequent production of hydrogen sulfide. The addition of an appropriate amount of methionine components can improve the growth and development of pigs, promote protein synthesis and cell proliferation, and help improve the meat quality of pigs and improve economic benefits. Methionine can also improve the pig's immunity and digestive ability, assist the pig in fully absorbing the carbohydrates in the composition, reduce the synthesis of hydrogen sulfide from hydrogen and sulfur in the feed, and thus reduce the generation and emission of hydrogen sulfide.

[0112] (4) As a good natural active ingredient, horseshoe crab antimicrobial peptide has the effects of clearing heat, removing dampness and inhibiting bacteria. After being added, it can increase the resistance of pigs; the added krill freeze-dried powder contains more than 50% protein and a full range of amino acids, which helps to promote pig cell growth, tissue repair and metabolism; the krill freeze-dried powder also contains a large amount of unsaturated fatty acids, which can enhance the immunity and environmental stress resistance of pigs after being added, help pigs absorb and utilize various nutrients in the composition, reduce the excretion of sulfur, and thus reduce the generation and emission of hydrogen sulfide;

[0113] (5) The addition of an appropriate amount of Saccharomyces boulardii powder can regulate the immune response in pigs, improve intestinal health, prevent and treat diarrhea, and reduce the production of hydrogen sulfide gas; the addition of an appropriate amount of oligoxylose components can improve the digestive tract flora of pigs, promote the growth of beneficial bacteria in the digestive tract, inhibit the reproduction of harmful microorganisms, and improve the body's resistance. The structure of oligoxylose molecules is similar to that of the receptors on the intestinal endothelial cells of harmful microorganisms in the intestine. They can bind to the surfaces of certain toxins, viruses, and fungal cells as adjuvants for these exogenous antigens, slowing down the absorption of antigens and increasing the titer of antigens, thereby enhancing the animal's somatic and humoral immune responses;

[0114] (6) The composition formed by compounding the various components provides rich protein and amino acids for pig growth. The addition of various organic compounds and trace elements improves the overall taste and nutritional value of the feed composition. After consumption, it can greatly enhance the immunity and disease resistance of pigs, promote the digestion and absorption of various nutrients in the composition by pigs, reduce the excretion of sulfur in the growth and development of pigs, and thus reduce the generation and emission of sulfur-containing compounds such as hydrogen sulfide; it also reduces the residual amount of unabsorbed protein, peptide and amino acid in feces, thereby reducing the direct source of hydrogen sulfide gas produced by subsequent fecal microbial decomposition, and ensuring the good growth and development of pigs. BRIEF DESCRIPTION OF THE DRAWINGS

[0115] Figure 1 is a first three-dimensional structural diagram of the present invention;

[0116] Figure 2 is a second three-dimensional structural diagram of the present invention;

[0117] Figure 3 It is the internal structure diagram of the present invention;

[0118] Figure 4 is a longitudinal cross-sectional view of the present invention;

[0119] Figure 5 It is a structural schematic diagram of the first feeding hopper of the present invention;

[0120] Figure 6 It is the internal structure diagram of the first feeding hopper of the present invention;

[0121] Figure 7 It is a structural schematic diagram of a multi-chamber hydraulic cylinder of the present invention;

[0122] Figure 8 It is a structural schematic diagram of the push rod of the present invention;

[0123] Fig. 9 This is a first structural schematic diagram of the crushing hopper of the present invention;

[0124] Fig.10 This is a second structural schematic diagram of the crushing hopper of the present invention;

[0125] Fig.11 It is a structural schematic diagram of the crushing component of the present invention;

[0126] Fig.12 is an internal structure diagram of the first mixing chamber of the present invention;

[0127] Fig.13 is an external structural diagram of the first mixing chamber of the present invention;

[0128] Fig.14 It is a first structural schematic diagram of the concentration chamber of the present invention;

[0129] Fig.15 is a second structural schematic diagram of the concentration chamber of the present invention;

[0130] Fig.16 This is a diagram of the internal structure of the concentration chamber of the present invention;

[0131] Fig.17 is a schematic structural diagram of a second stirring device of the present invention;

[0132] Fig.18 This is a diagram of the internal structure of the funnel-shaped material guiding cavity of the present invention;

[0133] Fig.19 It is a structural schematic diagram of the material guiding device of the present invention;

[0134] Fig. 20 is an external structural diagram of the second mixing chamber of the present invention;

[0135] Fig.21 is an internal structure diagram of the second mixing chamber of the present invention;

[0136] Fig. 22 is a cross-sectional view of the second mixing chamber of the present invention;

[0137] Fig.23 It is a schematic structural diagram of the present invention when the first bevel gear and the second bevel gear are meshed;

[0138] Fig.24 It is a structural schematic diagram of the vibrating screen of the present invention;

[0139] Fig.25 It is a schematic structural diagram of the multi-layer grinding device of the present invention;

[0140] Fig.26 It is a first structural schematic diagram of the object pushing device of the present invention;

[0141] Fig. 27 It is a second structural schematic diagram of the object pushing device of the present invention;

[0142] Fig.28This is a first external structural diagram of the discharge chamber of the present invention;

[0143] Fig.29 This is a second external structural diagram of the discharge chamber of the present invention;

[0144] Fig.30 This is a first internal structure diagram of the discharge chamber of the present invention;

[0145] Fig.31 It is a second internal structure diagram of the discharge cavity of the present invention;

[0146] Fig.32 It is a structural schematic diagram of the arc-shaped material discharging drawer of the present invention;

[0147] Fig.33 It is a structural schematic diagram of the third stirring device of the present invention;

[0148] Fig.34 It is a bar graph of the final ammonia detection results in the experimental example of the present invention;

[0149] Fig.35 It is a bar graph of the final hydrogen sulfide detection results in the experimental example of the present invention.

[0150] The markings in the attached drawings are: 100-shell; 101-sealing cover; 102-first feed hopper; 1021-feed hopper body; 1022-first feed port; 1023-feed flap; 1024-support frame; 10242-partition plate; 10243-feeding chamber; 10244-multi-chamber hydraulic cylinder; 10245-push rod; 10246-inclined feed plate; 103-crushing feed hopper; 1031-crushing feed port; 1032-crushing shell; 10321-first guide groove; 10322-second guide groove; 10323-first guide slider; 10324-second guide slider; 10325-screw rod; 10326-first stepping motor; 10327-first rotating motor; 1033- Crushing assembly; 10331-rotating rod; 10332-grinding roller; 10333-grinding teeth; 104-second feeding hopper; 1041-second oblique side feeding pipe; 105-third feeding hopper; 1051-third oblique side feeding pipe; 106-supporting foot; 200-first mixing chamber; 201-first stirring device; 2011-stirring rod; 2012-first driving motor; 2013-flat stirring blade; 2014-water inlet hole; 2015-water inlet pipe; 2016-water inlet pump; 202-first discharge pipe; 203-first discharge solenoid valve; 300-concentrating chamber; 302-heater; 303-cooler; 304-thermometer; 306-exhaust pipe; 3061-exhaust valve; 307-first Second stirring device; 3072-second stirring rod; 3073-stirring blade; 3075-feeding plate; 30751-first feeding plate; 30752-second feeding plate; 3076-fan-shaped feeding hole; 3077-second driving motor; 400-funnel-shaped guiding cavity; 401-guiding pipe; 403-fan-shaped feeding valve; 4031-swinging motor; 4032-fan-shaped sealing plate; 404-supporting cross bar; 500-feeding device; 501-double-headed motor; 5011-mounting rod; 5012-scraping row; 600-second mixing cavity; 6011-annular slot; 602-bow-shaped grinding cavity; 6021-annular rotating gear row; 6022-grinding cavity; 6023-strip feeding hole; 6024-grinding platform ;6031-first bevel gear;6032-second bevel gear;6033-vertical rotating rod;6034-lateral rotating rod;6035-first driving gear;6036-connecting sleeve;604-vibrating screen;6041-vibrating motor;605-pushing device;6051-hydraulic pushing rod;6053-pushing row;60531-pushing platform;60532-inclined section;60533-extended flat row;606-discharging channel;6061-collecting barrel;700-multi-layer grinding device;701-spindle rod;702-first driving rod;703-grinding rod;704-connecting seat;705-inclined material guide plate;706-grinding scraper;707-second driving rod;800-discharging chamber;801-feeding hole; 802-hot air blower; 803-arc-shaped discharging drawer; 8031-slideway; 8032-notch; 8033-discharging handle; 8034-sliding block; 804-third stirring device; 8041-third swinging rod; 8042-third swinging motor; 8043-connecting end; 8044-elastic telescopic rod; 8045-stirring rake. ; DETAILED DESCRIPTION

[0151] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0152] Embodiment 1:

[0153] The composition for reducing hydrogen sulfide emission in pig breeding process comprises the following components by weight:

[0154] 800 parts of wheat, 600 parts of soybean meal, 500 parts of rice bran, 200 parts of sorghum dry alcohol grains, 300 parts of cassava grains, 6 parts of oil powder, 2 parts of cottonseed meal, 6 parts of peanut kernel meal, 30 parts of DL-propargylglycine, 0.6 parts of feed salt, 0.04 parts of betaine, 0.01 parts of horseshoe crab antibacterial peptide, 1 part of boulardii yeast powder, 12 parts of xylo-oligosaccharides, 1 part of krill freeze-dried powder, 0.02 parts of methionine, and 0.6 parts of choline chloride.

[0155] A method for preparing a composition for reducing hydrogen sulfide emissions during pig farming comprises the following steps:

[0156] (I) placing appropriate amounts of wheat, soybean meal, rice bran, cottonseed meal and peanut kernel meal in a grinding hopper and grinding them to obtain a grinding material;

[0157] (II) feeding the crushed material in step (I) into a first mixing chamber;

[0158] (III) placing appropriate amounts of sorghum dry alcohol grains and cassava wine grains into the first mixing chamber of step (II) through a first feeding hopper and mixing to obtain a mixed initial material;

[0159] (IV) injecting distilled water into the mixed initial material of step (III) through a water inlet pipe, stirring and mixing, to obtain a mixed liquid material; the material-liquid ratio of the mixed initial material to distilled water in step (IV) is 1:1.5;

[0160] (V) feeding the mixed liquid material of step (IV) into a concentration chamber for heating, stirring and concentration to obtain a concentrated material; the concentration temperature in step (V) is 60° C.; the water content of the concentrated material in step (V) is 15%;

[0161] (VI) freeze-crushing and drying the concentrated material in step (V) to obtain a freeze-dried crushed material; the freeze-drying temperature in step (VI) is -10°C; the freeze-drying time in step (VI) is 1.5 hours;

[0162] (VII) feeding the freeze-dried crushed material in step (VI) into a second mixing chamber through a material guide device, adding appropriate amounts of feed salt, betaine and choline chloride into the second mixing chamber through a second feed hopper, and grinding and mixing them together to obtain a ground mixed material;

[0163] (VIII) passing the ground mixed material in step (VII) through a vibrating screen and feeding it into a discharge chamber; the mesh size of the vibrating screen is 0.5 mm;

[0164] (IX) adding appropriate amounts of oil powder, krill freeze-dried powder, DL-propargylglycine, horseshoe crab antimicrobial peptide, Saccharomyces boulardii powder, xylo-oligosaccharides and methionine into the discharge chamber of step (VIII) to obtain a nutrient mixture;

[0165] (Ⅹ) air-drying the nutrient mixture in step (Ⅸ) by means of a hot air blower, and collecting the air-dried dry powder to obtain a finished composition; the air-drying temperature in step (Ⅹ) is 45°C;.

[0166] The preparation of krill freeze-dried material includes the following steps:

[0167] (A01) taking fresh Antarctic krill, cleaning and deshelling the krill to obtain krill meat;

[0168] (A02) adding water to the krill meat in step (A01), heating and grinding the mixture to obtain a ground material; the material-liquid ratio in step (A02) is 1:5; and the heating temperature in step (A02) is 40° C.;

[0169] (A03) centrifuging the ground material in step (A02) to obtain a centrifuged meat material and a centrifuged liquid material;

[0170] (A04) adding activated carbon to the centrifuged liquid in step (A03) for decolorization and filtering to obtain a decolorized liquid;

[0171] (A05) mixing the decolorized liquid of step (A04) and the centrifuged meat material of step (A03) in a ratio of 1:3 to obtain a slurry;

[0172] (A06) stirring the slurry in step (A05) at a temperature of 70° C. and a pressure of 2.0 MPa for 45 min to obtain a meat paste;

[0173] (A07) eluting the meat paste in step (A06) with 10% anhydrous ethanol to obtain a purified material;

[0174] (A08) The purified material in step (A07) is centrifuged and freeze-dried to obtain a krill freeze-dried material; the freeze-drying temperature in step (A08) is -10°C; and the freeze-drying time in step (A08) is 1.5 hours.

[0175] Embodiment 2:

[0176] The composition for reducing hydrogen sulfide emission in pig breeding process comprises the following components by weight:

[0177] 1200 parts of wheat, 800 parts of soybean meal, 700 parts of rice bran, 600 parts of sorghum dry alcohol grains, 500 parts of cassava grains, 20 parts of oil powder, 9 parts of cottonseed meal, 12 parts of peanut kernel meal, 60 parts of DL-propargylglycine, 2.2 parts of feed salt, 0.25 parts of betaine, 0.06 parts of horseshoe crab antibacterial peptide, 10 parts of boulardii yeast powder, 36 parts of xylo-oligosaccharides, 4 parts of krill freeze-dried powder, 0.15 parts of methionine, and 2.4 parts of choline chloride.

[0178] The preparation method of the composition for reducing hydrogen sulfide emission in pig breeding process in this embodiment is basically the same as that in Example 1, except that:

[0179] The material-liquid ratio of the mixed initial material to distilled water in step (IV) is 1:3; the concentration temperature in step (V) is 85°C; the moisture content in the concentrated material in step (V) is 20%; the freeze-drying temperature in step (VI) is 0°C; the freeze-drying time in step (VI) is 3h; the mesh aperture of the vibrating screen is 1.5mm; and the air-drying temperature in step (X) is 60°C.

[0180] The preparation of the krill freeze-dried material in this embodiment is basically the same as that in Example 1, except that:

[0181] The material-liquid ratio in step (A02) is 1:20; the heating temperature in step (A02) is 60°C; the decolorized material in step (A04) and the centrifuged meat material in step (A03) are mixed and slurried in a ratio of 1:5 to obtain a slurry; the slurry in step (A05) is stirred at a temperature of 85°C and a pressure of 4.0 MPa for 90 minutes to obtain a meat paste; (A07) the meat paste in step (A06) is eluted with 11% anhydrous ethanol to obtain a purified material; the freeze-drying temperature in step (A08) is 0°C; the freeze-drying time in step (A08) is 3 hours.

[0182] Embodiment 3:

[0183] The composition for reducing hydrogen sulfide emission in pig breeding process comprises the following components by weight:

[0184] 850 parts of wheat, 650 parts of soybean meal, 550 parts of rice bran, 300 parts of sorghum dry alcohol grains, 350 parts of cassava grains, 8 parts of oil powder, 3 parts of cottonseed meal, 7 parts of peanut kernel meal, 35 parts of DL-propargylglycine, 0.8 parts of feed salt, 0.1 parts of betaine, 0.02 parts of horseshoe crab antibacterial peptide, 2 parts of boulardii yeast powder, 15 parts of xylo-oligosaccharides, 1.5 parts of krill freeze-dried powder, 0.06 parts of methionine, and 1 part of choline chloride.

[0185] The preparation method of the composition for reducing hydrogen sulfide emission in pig breeding process in this embodiment is basically the same as that in Example 1, except that:

[0186] The material-liquid ratio of the mixed initial material to distilled water in step (IV) is 1:2; the concentration temperature in step (V) is 65°C; the moisture content in the concentrated material in step (V) is 16%; the freeze-drying temperature in step (VI) is -8°C; the freeze-drying time in step (VI) is 2h; the mesh aperture of the vibrating screen is 0.8mm; and the air-drying temperature in step (X) is 50°C.

[0187] The preparation of the krill freeze-dried material in this embodiment is basically the same as that in Example 1, except that:

[0188] The material-liquid ratio in step (A02) is 1:10; the heating temperature in step (A02) is 45°C; in step (A05), the decolorized liquid and the centrifuged meat are mixed and slurried in a ratio of 1:4; the stirring temperature in step (A06) is 75°C; the stirring pressure in step (A06) is 2.5MPa; the stirring time in step (A06) is 50min; (A07) the meat paste in step (A06) is eluted with 12% anhydrous ethanol to obtain a purified material; the freeze-drying temperature in step (A08) is -8°C; the freeze-drying time in step (A08) is 2h.

[0189] Embodiment 4:

[0190] The composition for reducing hydrogen sulfide emission in pig breeding process comprises the following components by weight:

[0191] 1150 parts of wheat, 750 parts of soybean meal, 650 parts of rice bran, 500 parts of sorghum dry alcohol grains, 450 parts of cassava grains, 17 parts of oil powder, 7 parts of cottonseed meal, 11 parts of peanut kernel meal, 55 parts of DL-propargylglycine, 1.8 parts of feed salt, 0.2 parts of betaine, 0.05 parts of horseshoe crab antibacterial peptide, 8 parts of boulardii yeast powder, 30 parts of xylo-oligosaccharides, 3.5 parts of krill freeze-dried powder, 0.12 parts of methionine, and 2 parts of choline chloride.

[0192] The preparation method of the composition for reducing hydrogen sulfide emission in pig breeding process in this embodiment is basically the same as that in Example 1, except that:

[0193] The material-liquid ratio of the mixed initial material to distilled water in step (IV) is 1:2.5; the concentration temperature in step (V) is 80°C; the moisture content in the concentrated material in step (V) is 17%; the freeze-drying temperature in step (VI) is -2°C; the freeze-drying time in step (VI) is 2.5h; the mesh aperture of the vibrating screen is 1.2mm; and the air-drying temperature in step (X) is 55°C.

[0194] The preparation of the krill freeze-dried material in this embodiment is basically the same as that in Example 1, except that:

[0195] The material-liquid ratio in step (A02) is 1:15; the heating temperature in step (A02) is 55° C.; (A05) the decolorized material in step (A04) and the centrifuged meat material in step (A03) are mixed and beaten in a ratio of 1:3 to obtain a slurry;

[0196] The stirring temperature in step (A06) is 80°C; the stirring pressure in step (A06) is 3.5 MPa; the stirring time in step (A06) is 85 min; (A07) the meat paste in step (A06) is eluted with 13% anhydrous ethanol to obtain a purified material; the freeze-drying temperature in step (A08) is -2°C; the freeze-drying time in step (A08) is 2.5 h.

[0197] Embodiment 5:

[0198] The composition for reducing hydrogen sulfide emission in pig breeding process comprises the following components by weight:

[0199] 900 parts of wheat, 670 parts of soybean meal, 580 parts of rice bran, 350 parts of sorghum dry alcohol grains, 370 parts of cassava grains, 10 parts of oil powder, 4 parts of cottonseed meal, 8 parts of peanut kernel meal, 40 parts of DL-propargylglycine, 1 part of feed salt, 0.1 part of betaine, 0.03 part of horseshoe crab antibacterial peptide, 3 parts of boulardii yeast powder, 20 parts of xylo-oligosaccharides, 2 parts of krill freeze-dried powder, 0.08 parts of methionine, and 1.2 parts of choline chloride.

[0200] The preparation method of the composition for reducing hydrogen sulfide emission in pig breeding process in this embodiment is basically the same as that in Example 1, except that:

[0201] The material-liquid ratio of the mixed initial material to distilled water in step (IV) is 1:1.5; the concentration temperature in step (V) is 70°C; the moisture content in the concentrated material in step (V) is 18%; the freeze-drying temperature in step (VI) is -6°C; the freeze-drying time in step (VI) is 1.5h; the mesh aperture of the vibrating screen is 1mm; and the air-drying temperature in step (X) is 45°C.

[0202] The preparation of the krill freeze-dried material in this embodiment is basically the same as that in Example 1, except that:

[0203] The material-liquid ratio in step (A02) is 1:5; the heating temperature in step (A02) is 50°C; the decolorized liquid in step (A04) and the centrifuged meat material in step (A03) are mixed and slurried in a ratio of 1:5 to obtain a slurry; the stirring temperature in step (A06) is 70°C; the stirring pressure in step (A06) is 3MPa; the stirring time in step (A06) is 55min; (A07) the meat paste in step (A06) is eluted with 13% anhydrous ethanol to obtain a purified material; the freeze-drying temperature in step (A08) is -6°C; the freeze-drying time in step (A08) is 1.5h.

[0204] Embodiment 6:

[0205] The composition for reducing hydrogen sulfide emission in pig breeding process comprises the following components by weight:

[0206] 1100 parts of wheat, 730 parts of soybean meal, 620 parts of rice bran, 450 parts of sorghum dry alcohol grains, 430 parts of cassava grains, 15 parts of oil powder, 6 parts of cottonseed meal, 10 parts of peanut kernel meal, 50 parts of DL-propargylglycine, 1.5 parts of feed salt, 0.2 parts of betaine, 0.04 parts of horseshoe crab antibacterial peptide, 7 parts of boulardii yeast powder, 25 parts of xylo-oligosaccharides, 3 parts of krill freeze-dried powder, 0.1 parts of methionine, and 1.8 parts of choline chloride.

[0207] The preparation method of the composition for reducing hydrogen sulfide emission in pig breeding process in this embodiment is basically the same as that in Example 1, except that:

[0208] The material-liquid ratio of the mixed initial material to distilled water in step (IV) is 1:3; the concentration temperature in step (V) is 75°C; the moisture content in the concentrated material in step (V) is 19%; the freeze-drying temperature in step (VI) is -4°C; the freeze-drying time in step (VI) is 3h; the mesh aperture of the vibrating screen is 0.5mm; and the air-drying temperature in step (X) is 60°C.

[0209] The preparation of the krill freeze-dried material in this embodiment is basically the same as that in Example 1, except that:

[0210] The material-liquid ratio in step (A02) is 1:20; the heating temperature in step (A02) is 40°C; in step (A05), the decolorized liquid and the centrifuged meat are mixed and slurried in a ratio of 1:4; the stirring temperature in step (A06) is 85°C; the stirring pressure in step (A06) is 2.0MPa; the stirring time in step (A06) is 80min; (A07) the meat paste in step (A06) is eluted with 14% anhydrous ethanol to obtain a purified material; the freeze-drying temperature in step (A08) is -4°C; the freeze-drying time in step (A08) is 3h.

[0211] Embodiment 7:

[0212] The composition for reducing hydrogen sulfide emission in pig breeding process comprises the following components by weight:

[0213] 950 parts of wheat, 690 parts of soybean meal, 590 parts of rice bran, 380 parts of sorghum dry alcohol grains, 390 parts of cassava grains, 11 parts of oil powder, 4 parts of cottonseed meal, 8 parts of peanut kernel meal, 40 parts of DL-propargylglycine, 1 part of feed salt, 0.1 part of betaine, 0.03 part of horseshoe crab antibacterial peptide, 4 parts of boulardii yeast powder, 21 parts of xylo-oligosaccharides, 2 parts of krill freeze-dried powder, 0.08 parts of methionine, and 1.4 parts of choline chloride.

[0214] The preparation method of the composition for reducing hydrogen sulfide emission in pig breeding process in this embodiment is basically the same as that in Example 1, except that:

[0215] The material-liquid ratio of the mixed initial material to distilled water in step (Ⅳ) is 1:2; the concentration temperature in step (V) is 60°C; the moisture content in the concentrated material in step (V) is 15%; the freeze-drying temperature in step (VI) is -10°C; the freeze-drying time in step (VI) is 2h; the mesh diameter of the vibrating screen is 0.5mm; the mesh diameter of the vibrating screen is 1.5mm; the air-drying temperature in step (X) is 50°C.

[0216] The preparation of the krill freeze-dried material in this embodiment is basically the same as that in Example 1, except that:

[0217] The material-liquid ratio in step (A02) is 1:10; the heating temperature in step (A02) is 60°C; (A05) the decolorized material in step (A04) and the centrifuged meat material in step (A03) are mixed and beaten in a ratio of 1:3 to obtain a slurry; the stirring temperature in step (A06) is 75°C; the stirring pressure in step (A06) is 4.0MPa; the stirring time in step (A06) is 60min;

[0218] The freeze-drying temperature in step (A08) is -10°C; the freeze-drying time in step (A08) is 2 hours.

[0219] Embodiment 8:

[0220] The composition for reducing hydrogen sulfide emission in pig breeding process comprises the following components by weight:

[0221] 1050 parts of wheat, 710 parts of soybean meal, 610 parts of rice bran, 420 parts of sorghum dry alcohol grains, 410 parts of cassava grains, 14 parts of oil powder, 6 parts of cottonseed meal, 10 parts of peanut kernel meal, 50 parts of DL-propargylglycine, 1.5 parts of feed salt, 0.2 parts of betaine, 0.04 parts of horseshoe crab antibacterial peptide, 6 parts of boulardii yeast powder, 24 parts of xylo-oligosaccharides, 3 parts of krill freeze-dried powder, 0.1 parts of methionine, and 1.6 parts of choline chloride.

[0222] The preparation method of the composition for reducing hydrogen sulfide emission in pig breeding process in this embodiment is basically the same as that in Example 1, except that:

[0223] The material-liquid ratio of the mixed initial material to distilled water in step (IV) is 1:2.5; the concentration temperature in step (V) is 85°C; the moisture content in the concentrated material in step (V) is 16%; the freeze-drying temperature in step (VI) is 0°C; the freeze-drying time in step (VI) is 2.5h; the mesh aperture of the vibrating screen is 0.8mm; and the air-drying temperature in step (X) is 55°C.

[0224] The preparation of the krill freeze-dried material in this embodiment is basically the same as that in Example 1, except that:

[0225] The material-liquid ratio in step (A02) is 1:15; the heating temperature in step (A02) is 45°C; the decolorized liquid in step (A04) and the centrifuged meat material in step (A03) are mixed and slurried in a ratio of 1:5 to obtain a slurry; the stirring temperature in step (A06) is 80°C; the stirring pressure in step (A06) is 2.5MPa; the stirring time in step (A06) is 75min; (A07) the meat paste in step (A06) is eluted with 15% anhydrous ethanol to obtain a purified material; the freeze-drying temperature in step (A08) is 0°C; the freeze-drying time in step (A08) is 2.5h.

[0226] Embodiment 9:

[0227] The composition for reducing hydrogen sulfide emission in pig breeding process comprises the following components by weight:

[0228] 1000 parts of wheat, 700 parts of soybean meal, 600 parts of rice bran, 400 parts of sorghum dry alcohol grains, 400 parts of cassava grains, 12 parts of oil powder, 5 parts of cottonseed meal, 9 parts of peanut kernel meal, 45 parts of DL-propargylglycine, 1.2 parts of feed salt, 0.15 parts of betaine, 0.04 parts of horseshoe crab antibacterial peptide, 5 parts of boulardii yeast powder, 22 parts of xylo-oligosaccharides, 2.5 parts of krill freeze-dried powder, 0.09 parts of methionine, and 1.5 parts of choline chloride.

[0229] The preparation method of the composition for reducing hydrogen sulfide emission in pig breeding process in this embodiment is basically the same as that in Example 1, except that:

[0230] The material-liquid ratio of the mixed initial material to distilled water in step (IV) is 1:1.5; the concentration temperature in step (V) is 65°C; the moisture content in the concentrated material in step (V) is 18%; the freeze-drying temperature in step (VI) is -8°C; the freeze-drying time in step (VI) is 1.5h; the mesh aperture of the vibrating screen is 1.2mm; and the air-drying temperature in step (X) is 45°C.

[0231] The preparation of the krill freeze-dried material in this embodiment is basically the same as that in Example 1, except that:

[0232] The material-liquid ratio in step (A02) is 1:5; the heating temperature in step (A02) is 55°C; in step (A05), the decolorized liquid and the centrifuged meat are mixed and slurried in a ratio of 1:4; the stirring temperature in step (A06) is 70°C; the stirring pressure in step (A06) is 3.5MPa; the stirring time in step (A06) is 65min; (A07) the meat paste in step (A06) is eluted with 14% anhydrous ethanol to obtain a purified material; the freeze-drying temperature in step (A08) is -8°C; the freeze-drying time in step (A08) is 1.5h.

[0233] Experimental example:

[0234] In order to illustrate the effect of different deodorizing feed composition formulas in the present invention on reducing hydrogen sulfide emissions from livestock, especially pigs, the following experiment is used to illustrate, wherein the feed compositions in Examples 1 to 9 are selected as the experimental group, and ordinary corn-soybean meal feed is selected as the control group for the experiment.

[0235] 1.1 Experimental grouping and feeding management This study was conducted in August, with a trial period of 23 days. During this period, the experiment was divided into ten groups, and each group used the same mechanical ventilation system. Specifically, each pig house raised 150 Duroc×Chang×Da fattening pigs, each weighing about 95 kg, with 8 replicates in each group. The main purpose of the study was to compare the effects of the feed composition for reducing hydrogen sulfide emissions of the present invention and ordinary corn-soybean meal feed on pig growth performance and environmental gas emissions. In order to achieve this goal, the ten barns were manually cleaned every two days, and the manure and sewage channels were cleaned using a water-foaming manure cleaning method.

[0236] 1.2 Determination of indicators and methods The experiment lasted for 30 days, of which the first 7 days were the pre-experimental period, during which the proportion of the feed composition was gradually changed to allow the pigs in the experimental group to adapt to the changes brought about by the new formula feed composition of the present invention. The last 23 days were the formal experimental period, and the gas sampling points were used to detect the hydrogen sulfide content in the feeding environment according to the diagonal sampling method.

[0237] After the pilot period, the Shenzhen Kerno intelligent gas detector was used to measure the Fig.34 The ammonia concentration shown and Fig.35 The concentration of hydrogen sulfide is shown. The concentration of ammonia and hydrogen sulfide at each point in the two pig houses was recorded every two days.

[0238] During the experiment, the initial body weight, final body weight and total feed consumption of each pig were recorded.

[0239] 1.3 Data Processing The experimental data were preliminarily sorted using Excel, then generated using MATLAB data analysis software, and finally imported into the GLM in SAS statistical software for one-way analysis of variance to obtain statistical results.

[0240] 1.4 Data Results Display

[0241] Table 1: Hydrogen sulfide emissions from fattening pigs in each group

[0242]

[0243] Table 2: Ammonia emissions from fattening pigs in each group

[0244]

[0245] Table 3: Production performance of fattening pigs in each group

[0246]

[0247]

[0248] Tables 1 to 3 show the results of gas emission detection in a pig breeding experiment with an average initial weight of about 95 kg and a breeding period of 23 days. Compared with the control group, almost all the example groups showed the effect of reducing the concentration of hydrogen sulfide and ammonia in the house, especially Example 3, 6, 8, and 9 groups showed better hydrogen sulfide and ammonia reduction effects than the example group. From the perspective of the growth performance of pigs, all the example groups also maintained a higher average daily feed intake and average daily weight gain than the control group, among which Example 3, 6, 8 and 9 groups also showed better production performance and weight gain than other example groups. The above results show that pigs have a better absorption effect after eating the feed composition of the present invention, the feed composition of the present invention has a higher nutritional value, and can better promote the growth of pigs; feeding the composition formula feed that reduces hydrogen sulfide emissions also significantly reduces hydrogen sulfide emissions and ammonia emissions.

[0249] like Figure 1 , Figure 2 , Figure 3 and Figure 4The composition preparation device for reducing hydrogen sulfide emission in pig breeding process shown in the figure comprises a housing 100, a first feed hopper 102 and a crushing feed hopper 103 are arranged on the top of the housing 100; the first feed hopper 102 and the crushing feed hopper 103 are connected as shown in the figure. Fig.13 The first mixing chamber 200 shown in the figure has a first stirring device 201 disposed therein; the bottom of the first mixing chamber 200 is connected to a concentration chamber 300 through a first feed pipe 202, and the concentration chamber 300 has a Fig.14 The heater 302 and the cooler 303 are shown in the figure, and a second stirring device 307 is rotatably provided in the concentration chamber 300; the bottom of the concentration chamber 300 is connected to the funnel-shaped material guide chamber 400 through a fan-shaped material discharge hole 3076; the bottom of the funnel-shaped material guide chamber 400 is connected to the second mixing chamber 600 through a material guide pipe 401, and a second mixing chamber 600 is rotatably provided in the second mixing chamber 600. Fig. 22 The arcuate grinding chamber 602 shown in the figure has a multi-layer grinding device 700 rotatably arranged in the arcuate grinding chamber 602, and each grinding layer of the multi-layer grinding device 700 corresponds to each grinding layer of the arcuate grinding chamber 602; a vibrating screen 604 is arranged at the bottom of the second mixing chamber 600; and a discharge chamber 800 is connected to the bottom of the second mixing chamber 600. The first mixing chamber 200, the concentration chamber 300, the funnel-shaped guide chamber 400, the second mixing chamber 600 and the discharge chamber 800 are all located in the housing 100.

[0250] A sealing cover 101 is provided on the top of the shell 100, and the first feed hopper 102 and the crushing feed hopper 103 are arranged on the sealing cover 101. The bottom of the first feed hopper 102 is connected to the first mixing chamber 200; the top of the crushing feed hopper 103 is provided with a crushing feed port 1031, and the bottom of the crushing feed hopper 103 is connected to the first mixing chamber 200. A second feed hopper 104 is provided on the shell 100, and the second feed hopper 104 is connected to the inside of the guide pipe 401 through a second oblique side feed pipe 1041. A third feed hopper 105 is provided on the shell 100, and the third feed hopper 105 is connected to the inside of the discharge chamber 800 through a third oblique side feed pipe 1051, and the end of the third oblique side feed pipe 1051 away from the third feed hopper 105 is located above the arc-shaped discharge drawer 803. The overall structure of the second feed hopper 105 and the third feed hopper 106 is the same as that of the first feed hopper 102. A supporting foot 106 is provided at the bottom of the housing 100 .

[0251] The first hopper 102 includes Figure 5 The feed hopper body 1021 shown in the figure has a bottom portion connected to the first mixing chamber 200, and a first feed port 1022 is provided on the top of the feed hopper body 1021; a support frame 1024 is provided inside the feed hopper body 1021, and a plurality of partition plates 10242 are provided between the support frame 1024 and the inner wall of the feed hopper body 1021, and the plurality of partition plates 10242 divide the interior of the feed hopper body 1021 into a corresponding number of Figure 6 The unloading chamber 10243 shown in the figure has a movable bottom portion provided with Figure 8 The inclined unloading plate 10246 is shown. The first feeding port 1022 is hinged with a feeding flap 1023. The support frame 1024 is provided with Figure 7 The multi-chamber hydraulic cylinder 10244 shown in the figure has a plurality of push rods 10245 slidably disposed on the support frame 1024, and the plurality of push rods 10245 correspond to the chambers of the multi-chamber hydraulic cylinder 10244, one end of the push rod 10245 is connected to the piston end at the corresponding chamber, and one end of the push rod 10245 away from the multi-chamber hydraulic cylinder 10244 is connected to the corresponding inclined blanking plate 10246. The downward inclination angle of the inclined blanking plate 10246 is 15 degrees to 60 degrees; the downward inclination angle of the inclined blanking plate 10246 is 20 degrees to 55 degrees; the downward inclination angle of the inclined blanking plate 10246 is 25 degrees to 50 degrees; the downward inclination angle of the inclined blanking plate 10246 is 30 degrees to 45 degrees; the downward inclination angle of the inclined blanking plate 10246 is 35 degrees to 40 degrees.

[0252] The crushing hopper 103 includes Fig. 9 The pulverizing shell 1032 shown in the figure has a bottom portion connected to the first mixing chamber 200, and a pair of pulverizing assemblies 1033 are arranged in the pulverizing shell 1032 to rotate side by side and have a relative spacing that can be adjusted. The pulverizing shell 1032 is provided with a first guide groove 10321 and a first guide groove 10322 disposed opposite to each other. Fig.10 The second guide groove 10322 shown in the figure, a group of first guide sliders 10323 are relatively slidably arranged in the first guide groove 10321, a group of second guide sliders 10324 are relatively slidably arranged in the second guide groove 10321, a crushing component 1033 is rotatably arranged on the corresponding group of first guide sliders 10323 and second guide sliders 10324, and another crushing component 1033 is rotatably arranged on the corresponding other group of first guide sliders 10323 and second guide sliders 10324. A group of first guide sliders 10323 are connected through a screw rod 10325, and a group of first guide sliders 10323 are respectively connected to the screw rod 10325 by reverse threading. A first stepper motor 10326 is provided on the crushing shell 1032, and the driving end of the first stepper motor 10326 is connected to one end of the screw rod 10325; a group of second guide sliders 10324 are each provided with a first rotating motor 10327, and the driving end of the first rotating motor 10327 is connected to the end of the rotating rod 10331 of the corresponding crushing assembly 1033 away from the first stepper motor 10326. The crushing assembly 1033 includes a rotating rod 10331, and both ends of the rotating rod 10331 are rotatably arranged on the corresponding group of first guide sliders 10323 and second guide sliders 10324, and the rotating rod 10331 is provided with the following Fig.11The grinding roller 10332 shown has a plurality of rows of grinding teeth 10333. The grinding teeth 10333 on the two grinding rollers 10332 mesh with each other.

[0253] like Fig.12 The first stirring device 201 shown includes a first driving motor 2012, which is arranged on the top of the shell 100. The driving end of the first driving motor 2012 is provided with a stirring rod 2011. The stirring rod 2011 passes through the shell 100 and is rotatably arranged in the first mixing chamber 200. The stirring rod 2011 is provided with a plurality of flat stirring blades 2013.

[0254] The first mixing chamber 200 has a water inlet hole 2014 at its upper portion, a water inlet pipe 2015 is inserted into the water inlet hole 2014, a water flow meter is provided on the water inlet pipe 2015, and a water inlet pump 2016 is connected to one end of the water inlet pipe 2015 away from the water inlet hole 2014. The first material discharge pipe 202 is provided with a first material discharge solenoid valve 203. The concentration chamber 300 is connected with a temperature measuring instrument 304.

[0255] The second stirring device 307 includes a second driving motor 3077, which is disposed at the bottom of the concentration chamber 300. The driving end of the second driving motor 3077 is provided with a second stirring rod 3072, which is rotatably disposed inside the concentration chamber 300. The second stirring rod 3072 is provided with a plurality of stirring blades 3073, and the second stirring rod 3072 is provided with a plurality of material-diverting plates 3075, which are in contact with the bottom surface of the concentration chamber 300. The bottom of the concentration chamber 300 is provided with a fan-shaped material discharge hole 3076, and a fan-shaped material discharge valve 403 is rotatably disposed at the fan-shaped material discharge hole 3076. The material-diverting plate 3075 includes: Fig.17 The first material plate 30751 and the second material plate 30752 shown in the figure have a length of the first material plate 30751 that is the same as the bottom radius of the concentration chamber 300, and a length of the second material plate 30752 that is 1 / 3 to 1 / 2 of the length of the first material plate 30751. The fan-shaped discharge hole 3076 has a fan-shaped structure extending outward from the center of the concentration chamber 300. The fan-shaped discharge valve 403 includes a swing motor 4031, which is disposed at the bottom of the concentration chamber 300. The driving end of the swing motor 4031 is provided with a Fig.15 The fan-shaped sealing plate 4032 shown in the figure matches the fan-shaped discharge hole 3076. One side of the concentration chamber 300 is provided with a Fig.16 The air outlet pipe 306 shown in the figure passes through the housing 100 and extends to the outside of the housing 100. The air outlet pipe 306 is provided with an air outlet valve 3061. The part of the air outlet pipe 306 located outside the housing 100 is tilted upward at an angle of 30 to 45 degrees.

[0256] The bottom of the funnel-shaped material guiding chamber 400 is provided with a rotating Fig.18 The material guiding device 500 shown in the figure rotates and fits with the inner wall surface of the funnel-shaped material guiding cavity 400. The material guiding device 500 includes a double-headed motor 501, and the inner wall of the material guiding tube 401 is provided with a supporting crossbar 404. The double-headed motor 501 is arranged on the supporting crossbar 404. The first driving end of the double-headed motor 501 close to the funnel-shaped material guiding cavity 400 is provided with a mounting rod 5011, and the mounting rod 5011 is provided with the following Fig.19 The scraper row 5012 shown is rotatably fitted with the inner wall surface of the funnel-shaped material guiding cavity 400. The scraper row 5012 is a structure with a gradually decreasing width toward the mounting rod 5011.

[0257] The top of the second mixing chamber 600 is provided with an annular groove 6011, which is located outside the guide tube 401. Fig. 20 As shown, the annular rotating gear row 6021 and the arcuate grinding chamber 602 are connected to the annular rotating gear row 6021 .

[0258] The second driving end of the double-headed motor 501 is connected to a vertical rotating rod 6033, on which a first bevel gear 6031 is provided, and a second bevel gear 6032 is meshed with the first bevel gear 6031; a connecting sleeve 6036 is rotatably provided on the vertical rotating rod 6033, and the connecting sleeve 6036 is provided with a Fig.23 The second bevel gear 6032 is arranged at one end of the lateral rotating rod 6034, and the first driving gear 6035 is fixedly arranged at the end of the lateral rotating rod 6034 away from the double-headed motor 501. The first driving gear 6035 is meshed with the annular rotating gear row 6021. The bow-shaped grinding chamber 602 is provided with a plurality of layers of grinding cavities 6022 from top to bottom, and the bottom of each layer of grinding cavity 6022 is formed as shown in FIG. Fig.21 The grinding platform 6024 shown in the figure has a plurality of strip-shaped feed holes 6023, and the upper strip-shaped feed holes 6023 correspond to the grinding platform 6024 of the adjacent lower layer; the grinding platform 6024 is rotatably matched with the multi-layer grinding device 700. The strip-shaped feed holes 6023 extend in a direction toward the multi-layer grinding device 700. The first bevel gear 6031 is located in the connecting sleeve 6036, and the connecting sleeve 6036 is provided with an anti-sticking layer.

[0259] The multi-layer grinding device 700 includes a main shaft 701, the end of which is connected to the vertical rotating rod 6033. The main shaft 701 is provided with a plurality of first driving rods 702, and the first driving rods 702 are rotatably sleeved with the following Fig.25The grinding rod 703 shown in the figure rotates relative to the grinding platform 6024. The length of the grinding rod 703 is the same as the depth of the grinding platform 6024. A connecting seat 704 is provided at the connection between the main shaft rod 701 and the vertical rotating rod 6033. The connecting seat 704 is provided with an inclined material discharge guide plate 705. The end of the inclined material discharge guide plate 705 away from the connecting seat 704 points to the surface of the grinding platform 6024 on the top layer. A plurality of second driving rods 707 are provided on the main shaft rod 701. The second driving rods 707 are provided with a grinding scraper 706. The grinding scraper 706 fits the surface of the grinding platform 6024 of the corresponding layer. The length of the grinding scraper 706 is the same as the depth of the grinding platform 6024. As shown Fig.24 The vibrating screen 604 shown is provided with a vibrating motor 6041 on both sides.

[0260] The housing 100 is provided with Fig.26 The pushing device 605 shown in the figure has a pushing end located below the bow-shaped grinding chamber 602 in the second mixing chamber 600; a discharge channel 606 is provided in the second mixing chamber 600, and the discharge channel 606 is arranged to be inclined downward, and the pushing end of the pushing device 605 corresponds to the entrance of the discharge channel 606, and the outlet of the discharge channel 606 extends to the outside of the housing 100, and the outlet of the discharge channel 606 is detachably connected to a collecting bucket 6061. The pushing device 605 includes a device disposed on the housing 100 as shown in FIG. Fig. 27 The hydraulic push rod 6051 shown in the figure has a push end which is telescopically arranged in the second mixing chamber 600, and a push row 6053 is provided at the push end of the hydraulic push rod 6051, and the bottom of the push row 6052 is located in the same plane as the vibrating screen 604, and the push row 6052 corresponds to the entrance of the discharge channel 606. The hydraulic push rod 6051 is a multi-stage hydraulic cylinder structure, and the push row 6052 is connected to the telescopic end of the multi-stage hydraulic cylinder. The push row 6053 includes a push platform 60531, and the push platform 60521 is connected to the telescopic end of the multi-stage hydraulic cylinder. The two sides of the push platform 60521 are provided with extended flat rows 60533 through inclined sections 60532. A material discharge through hole 801 is provided at the top of the discharge chamber 800, and the material discharge through hole 801 corresponds to the vibrating screen 604.

[0261] The top of the discharge chamber 800 is provided with Fig.28 The hot air blower 802 shown in the figure has an arc-shaped discharge drawer 803 slidingly arranged in the discharge chamber 800, and the air outlet of the hot air blower 802 points to the inside of the arc-shaped discharge drawer 803. Fig.30 The third stirring device 804 shown in the figure has a stirring position located inside the arc-shaped discharge tray 803. The inner wall of the discharge chamber 800 is provided with a Fig.31 As shown in the slide groove 8031 ​​, a slider 8034 is provided on the arc-shaped discharge drawer 803 , and the slider 8034 is slidably disposed in the slide groove 8031 ​​.

[0262] The third stirring device 804 includes Fig.29 The third swing motor 8042 shown in the figure is arranged on the discharge chamber 800, and the swing end of the third swing motor 8042 is provided with a Fig.33 The third swing rod 8041 shown in the figure has one end of the third swing rod 8041 away from the third swing motor 8042 connected to an elastic telescopic rod 8044 via a connecting end 8043, and one end of the elastic telescopic rod 8044 away from the connecting end 8043 is provided with a stirring rake 8045, and the stirring rake 8045 is in contact with the bottom of the arc-shaped discharge bin 803.

[0263] The arc-shaped discharge drawer 803 is provided with a notch 8032 at one end close to the third swing motor 8042, and the third swing rod 8041 is rotatably arranged in the notch 8032; the arc-shaped discharge drawer 803 is provided with a notch 8032 at one end away from the third swing motor 8042. Fig.32 The discharging handle 8033 is shown. The overall shape of the stirring rake 8045 is an arc shape. The swing angle of the elastic telescopic rod 8044 is 30 degrees to 40 degrees.

[0264] The working principle of the device of the present invention is:

[0265] The first feeding hopper 102 is used to smoothly add sorghum dry alcohol grains and cassava wine grains raw materials into the first mixing chamber 200; the crushing feeding hopper 103 is used to add wheat, soybean meal, rice bran, cottonseed meal and peanut kernel meal raw materials and then crush them; the first stirring device 201 is used to fully mix and dissolve the added raw materials in water; the first feeding pipe 202 is used to smoothly send the mixed liquid into the concentration chamber 300; the concentration chamber 300 provides a processing environment for the reprocessing of the mixed liquid; the heater 302 is used to heat and concentrate the mixed liquid; the cooler 303 is used to freeze-dry the concentrated material; the second stirring device 307 is used for good concentration and sufficient freeze-crushing and drying of the mixed liquid; the fan-shaped feeding hole 3076 in the present invention is used to fully and completely send the freeze-dried crushed material into the funnel-shaped guide chamber 400; the funnel-shaped guide chamber 400 and the guide pipe 401 are used to smoothly guide the freeze-dried crushed material into the second mixing chamber 600; the bow-shaped grinding chamber 602 cooperates with the multi-layer grinding device 700, The freeze-dried crushed material and the added feed salt, betaine and choline chloride raw materials are fully ground and mixed; the vibrating screen 604 is used to ensure the appearance of the final feed composition, which is in a form that is more beneficial to pigs; the discharge cavity 800 is used to process the final mixing of the main raw material components and the accessories to obtain a nutritious feed composition product that is beneficial to pigs' absorption and can effectively reduce hydrogen sulfide emissions and subsequent regeneration; the overall vertical multi-layer tower setting can guide the materials from top to bottom by gravity, and each raw material is respectively subjected to water-soluble stirring, evaporation concentration, freeze drying, multi-stage grinding, screening and return material, and air-dried mixing from top to bottom to achieve good processing and mixing of each component material. The overall processing adopts physical methods to ensure the original activity of the effective ingredients in each raw material material, avoid the change and loss of the active ingredients in the raw material material, and finally obtain a nutritious feed composition product that is beneficial to pigs' absorption and can effectively reduce hydrogen sulfide emissions and subsequent regeneration, which can be produced and used in batches.

[0266] The sealing cover 101 provides an installation position for the first feeding hopper 102 and the crushing feeding hopper 103, and can also prevent non-raw material debris from falling into the first mixing chamber 200; the crushing feeding port 1031 is used for adding raw materials that need to be crushed, such as wheat, soybean meal, rice bran, cottonseed meal and peanut kernel meal; the first feeding hopper 102 and the crushing feeding hopper 103 are used to add the added raw materials separately or add them after processing, so that the materials entering the first mixing chamber 200 can be better mixed, thereby improving the quality of the finished product; the first feeding port 1022 is used for adding sorghum dry alcohol grains and cassava wine grains raw materials; different unloading chambers 10243 are used to hold different types of raw materials; the inclined unloading plate 10246 is used to open and close the bottom of the unloading chamber 10243, and when unloading is needed , the raw materials can slide down along the inclined material discharge plate 10246 into the first mixing chamber 200. When material discharge is not needed, the inclined material discharge plate 10246 blocks the raw materials in the corresponding material discharge chamber 10243, which has good flexibility; the feed flap 1023 can prevent debris from falling into the material discharge chamber 10243; the multi-chamber hydraulic cylinder 10244 and a plurality of push rods 10245 can cooperate to intelligently control the inclined material discharge plate 10246 to open and close the corresponding material discharge chamber 10243; the first feed hopper 102 realizes the separation and addition of multiple materials through the partition plate 10242, and controls the addition amount of a single material through the multi-chamber hydraulic cylinder 10244, thereby improving the feeding accuracy; a pair of crushing components 10244 with adjustable relative spacing are arranged in parallel and rotated. 33, can realize good crushing of large-particle raw materials, by adjusting the distance between the crushing components 1033, can control the size of the crushed particles; the first guide groove 10321, the second guide groove 10322, the first guide slider 803410323 and the second guide slider 803410324 can well realize the stable adjustment of the distance between the two crushing components 1033; the screw rod 10325 can realize the precise adjustment of the distance between the two crushing components 1033; the first rotating motor 10327 provides power for the crushing between the two crushing components 1033; the bite between the grinding teeth 10333 can realize good crushing of large-particle raw materials; the large-particle solid raw materials are ground into powder by the crushing hopper 103 The material is crushed into small particles, which can achieve full mixing of large particle raw materials and small particle raw materials entering the first feeding hopper 102, thereby improving the uniformity of the finished product of the preliminary mixed raw materials; the first guide slider 803410323 and the second guide slider 803410324 are driven by the screw rod 10325 and the first stepper motor 10326 to move synchronously in the first guide groove 10321 and the second guide groove 10322, which can quickly change the distance between the grinding rollers 10332, and crush large particle raw materials of various particle sizes into small particle raw materials of required sizes; a plurality of flat stirring blades 2013 can achieve full mixing and dissolution of raw materials in water; the water inlet pump 2016 is used to accurately add external water into the first mixing chamber 200 as required;Through the intelligent control of the first material discharge solenoid valve 203, the mixed liquid material is sent to the concentration chamber 300 for heating, stirring and concentration without manual intervention. The stirring rod 2011 is driven to rotate by the first driving motor 2012, and the water inlet pump 2016 is used to press water into the first mixing chamber 200 to mix and stir with the raw materials entering the first mixing chamber 200 to form a mixed liquid material. The flat stirring blade 2013 can increase the contact area between the stirring blade and the mixed liquid material during the rotation process, so that the raw materials are more evenly and fully dissolved in the water, and the mixing uniformity is improved; the thermometer 304 can monitor the temperature in the concentration chamber 300 in real time, so as to control the working conditions of the heater 302 and the cooler 303. The thermometer 304 is electrically connected to the heater 302 and the cooler 303 in the concentration chamber 300, and monitors and links the heater 302 or the cooler 303 in real time to concentrate and freeze-dry the mixed liquid entering the concentration chamber 300, and discharges the water vapor generated during the concentration process through the outlet pipe 306. ;

[0267] When heating and concentrating, the stirring blade 3073 and the material-pickling plate 3075 can fully stir the mixed liquid material to achieve a faster concentration effect; the stirring blade 3073 can also cut the material during the stirring process, and when it reaches the freeze-drying stage, the freeze-dried crushed material with a smaller particle size can be obtained through stirring and cutting; the material-pickling plate 3075 rotates closely against the bottom surface of the concentration chamber 300, and when the fan-shaped discharge hole 3076 is opened, the material-pickling plate 3075 can push the freeze-dried crushed material as completely as possible without any residue, and drop it from the fan-shaped discharge hole 3076; the first material-pickling plate 30751 and the second material-pickling plate 30752 with limited lengths can fully stir the material on the one hand, and on the other hand, can push the freeze-dried crushed material in the concentration chamber 300 to the fan-shaped discharge hole 3076 as completely as possible without any residue; the second driving motor 3077 drives the second stirring rod 3072 to rotate, and the second stirring rod 3072 The stirring blade 3073 on the mixing plate can cut the concentrated block raw materials into freeze-dried crushed materials of uniform size. The freeze-dried crushed materials after cutting are accumulated at the bottom of the concentration chamber 300. The freeze-dried crushed material particles at the bottom of the concentration chamber 300 are horizontally moved to the fan-shaped discharge hole 3076 by the first material plate 30751 and the second material plate 30752 to be sent out of the concentration chamber 300; the fan-shaped discharge hole 3076 can smoothly and completely send the freeze-dried crushed material particles to the second mixing chamber 600, reducing the accumulation of materials at the bottom of the concentration chamber 300; the fan-shaped sealing plate 4032 cooperates with the fan-shaped discharge hole 3076, and intelligently controls the swing motor 4031 to work as needed, opens the fan-shaped sealing plate 4032, and sends the freeze-dried crushed material in the concentration chamber 300 from the fan-shaped discharge hole 3076 into the second mixing chamber 600; when heating and concentrating, the gas outlet valve 3061 is opened, and water vapor and other gases are discharged to the outside through the gas outlet pipe 306.

[0268] The material guiding device 500 can guide the freeze-dried and crushed materials that fall from the fan-shaped discharge hole 3076 into the funnel-shaped material guiding chamber 400 smoothly and completely into the second mixing chamber 600; the support cross bar 404 stably supports the double-headed motor 501 in the material guiding tube 401; one end of the double-headed motor 501 drives the scraper row 5012 to rotate in close contact with the inner wall surface of the funnel-shaped material guiding chamber 400, so that the freeze-dried and crushed materials that fall into the funnel-shaped material guiding chamber 400 can slide smoothly into the second mixing chamber 600, avoiding the freeze-dried and crushed materials from sticking to the wall surface of the funnel-shaped material guiding chamber 400 and causing material waste; the scraper row 5012 with a limited structure can better The freeze-dried crushed material in the cavity 400 is scraped into the second mixing cavity 600; the annular groove 6011 provides an installation position for the stable rotation of the annular rotating tooth row 6021; the annular rotating tooth row 6021 can well receive the external driving force to drive the bow-shaped grinding cavity 602 to rotate, and the grinding process is well realized; the vertical rotating rod 6033 can well drive the first bevel gear 6031 to rotate, the first bevel gear 6031 engages to drive the second bevel gear 6032 to rotate, and continues to drive the annular rotating tooth row 6021 to rotate in the annular groove 6011 through the horizontal rotating rod 6034 and the first driving gear 6035, and the grinding process is smoothly realized. The two ends of the double-headed motor 501 respectively control the material guiding device 500 and the multi-layer grinding device 700, which can ensure the synchronous rotation of the material guiding device 500 and the multi-layer grinding device 700, thereby ensuring the subsequent grinding efficiency; the oblique design of the scraper row 5012 can scrape the material on the material guiding device 500 into the second mixing chamber 600 to the maximum extent; the multi-layer grinding device 700 is driven to rotate by the double-headed motor 501, and at the same time, the annular rotating gear row 6021 is engaged with the first driving gear 6035, thereby driving the bow-shaped grinding chamber 602 to rotate, and the rotation direction of the multi-layer grinding device 700 is opposite to that of the bow-shaped grinding chamber 602, so that the material grinding process inside the second mixing chamber 600 is in a double speed state, ensuring good grinding processing efficiency. ; The grinding part of the multi-layer grinding device 700 rotates in the corresponding grinding cavity 6022, and the grinding platform 6024 cooperates with the grinding part of the grinding device to achieve a good grinding process for the material; the strip discharge hole 6023 is used to allow the material on the corresponding grinding platform 6024 to fall to the next layer of grinding platform 6024 for further grinding; the upper strip discharge hole 6023 corresponds to the adjacent lower layer of grinding platform 6024 in order to achieve multi-layer grinding from top to bottom and ensure a fine grinding effect; the strip discharge hole 6023 on the grinding platform 6024 allows the material being processed on the current grinding platform 6024 during the grinding process to enter the next layer of grinding platform 6024 through the strip discharge hole 6023 for further grinding, so that the material is fully ground and processed.

[0269] The connecting sleeve 6036 can protect the first bevel gear 6031 and the second bevel gear 6032, preventing the material from falling to the first bevel gear 6031 and the second bevel gear 6032 to affect the rotation process and also avoid material waste; the anti-sticking layer can ensure that the material falling on the connecting sleeve 6036 slides smoothly into the bow-shaped grinding chamber 602, preventing the material from sticking to the connecting sleeve 6036 and causing waste; the first driving rod 702 drives the grinding rod 703 to rotate relative to the grinding platform 6024, so as to realize the grinding process well; the grinding rod 703 with a limited length can fully and comprehensively grind the material on the grinding platform 6024; the inclined material discharge guide plate 705 can smoothly guide the fallen material to the top grinding platform 6024 for grinding; the second driving rod 702 drives the grinding scraper 706 to rotate, scrapes the material on the corresponding grinding platform 6024 to the strip-shaped material discharge hole 6023, and drops it to the bottom The grinding platform 6024 of one layer continues to grind; the grinding scraper 706 with a limited length can fully and completely scrape the grinding material on the current grinding platform 6024 to the strip discharge hole 6023 and drop it to the next grinding platform 6024 for further grinding; the vibration motor 6041 drives the vibration screen 604 to vibrate, which plays a good role in screening the grinding particles. The grinding particles passing through the vibration screen 604 are qualified products, and the grinding particles that cannot pass through the vibration screen 604 are unqualified products and need to be further ground; the pushing device 605 pushes the larger particles that have not passed through the vibration screen 604 to the outlet channel 606, which are collected by the collection barrel 6061 and then sent back to the bow-shaped grinding chamber 602 for further grinding; the hydraulic pushing rod 6051 provides a driving force for pushing the larger particles retained in the vibration screen 604; the pushing row 6053 smoothly pushes the larger particles retained in the vibration screen 604 to the entrance of the outlet channel 606.The pushing device 605 is at the bottom of the second grinding chamber, and the bottom of the pushing device 605 is at the same level as the vibrating screen 604. The hydraulic pushing rod 6051 pushes the pushing row 6053 horizontally through the vibrating screen 604, and then sends the grinding particles that cannot pass through the vibrating screen 604 to the outlet channel 606 on the other side. The unqualified products are sent to the collection bucket 6061 through the outlet channel 606 for temporary collection, and the unqualified products are poured into the second hopper 104 through the detachable collection bucket 6061 and returned to the bow-shaped grinding chamber 602 for re-grinding into qualified products; the multi-stage hydraulic cylinder can The pushing row 6053 is driven well to push the larger particles trapped in the vibrating screen 604 to the entrance of the outlet channel 606. After the pushing is completed, the multi-stage hydraulic cylinder drives the pushing row 6053 back to the starting position to prepare for the next pushing work; the extended horizontal row 60533 cooperates with the pushing platform 60531 through the inclined section 60532 to push the larger particles trapped in the vibrating screen 604 to the entrance of the outlet channel 606 as completely and smoothly as possible; the discharge hole 801 is used for qualified materials passing through the vibrating screen 604 to enter the discharge cavity 800 smoothly.

[0270] The mild hot air from the hot air blower 802 can gently dry the final material in the arc-shaped discharge drawer 803, so that the final feed composition has better quality; the arc-shaped discharge drawer 803 is slidably arranged in the discharge cavity 800, so as to facilitate the bagging of the final prepared feed composition product; the third stirring device 804 can fully and evenly stir the material added to the arc-shaped discharge drawer 803, and finally obtain a feed composition product with good uniformity. The hot air blower 802 blows hot air from top to bottom to dry the finished materials entering the discharge chamber 800; the arc-shaped design of the discharge drawer is conducive to concentrating the finished materials at the bottom of the arc for rapid collection; the third stirring device 804 is used to fully mix the last added raw materials with the ground materials to improve the uniformity of the final product; the slider 8034 cooperates with the slide chute 8031 ​​to realize the smooth push and pull of the arc-shaped discharge drawer 803 in the discharge chamber 800; the third swing motor 8041 drives the third swing rod 8041 to swing left and right, so that the stirring rake 8045 stirs the materials in the arc-shaped discharge drawer 803 well; The elastic telescopic rod 8044 makes the distance between the stirring rake 8045 and the bottom of the arc-shaped discharge drawer 803 relatively movable. When the material in the arc-shaped discharge drawer 803 is thicker, the elastic telescopic rod 8044 will shrink appropriately. Through the elastic shrinkage of the elastic telescopic rod 8044, the stirring rake 8045 can fully stir the material in the arc-shaped discharge drawer 803; the notch 8032 is used to prevent the arc-shaped discharge drawer 803 from colliding with the third swing motor 8041 during the process of pulling out and pushing in; the discharge handle 8033 is used for the operator to pull out and push the arc-shaped discharge drawer 803 into the discharge cavity 800; the elastic telescopic rod 804 The distance between the bottom of the stirring rake 8045 and the arc-shaped discharge drawer 803 can be adjusted. The third swinging rod 8041 is driven to swing back and forth in the vertical direction by starting the third swinging motor 8041, driving the stirring rake 8045 to perform a pendulum motion, and all the materials entering the arc-shaped discharge drawer 803 are completely mixed; wherein the curvature of the inner surface of the arc-shaped discharge drawer 803 increases slightly from the bottom center to both sides, and the curvature of the stirring rake 8045 remains unchanged from the center to both sides, so that the stirring rake 8045 can fit with the arc-shaped discharge drawer 803 during the stirring process of the pendulum motion, thereby improving the stirring efficiency; the second feeding hopper 104 is used for Feed salt, betaine and choline chloride are added into the bow-shaped grinding chamber 602 and ground together with the freeze-dried crushed material; the second feed hopper 104 is also used to add unqualified ground products back into the bow-shaped grinding chamber 602 for re-grinding into qualified products; the third feed hopper 105 is used to add oil powder, krill freeze-dried powder, DL-propargylglycine, horseshoe crab antimicrobial peptide, boulardii yeast powder, oligoxylose and methionine nutrient mixture into the arc-shaped discharge drawer 803, and mix and compound with the ground mixture passing through the vibrating screen 604 to form the finished feed composition of the present invention; the support foot 106 can provide stable support for the device during operation.

Claims

1. A composition for reducing hydrogen sulfide emissions during pig farming, characterized in that: The following components are included by weight: 800-1200 parts of wheat, 600-800 parts of soybean meal, 500-700 parts of rice bran, 200-600 parts of sorghum dry alcohol grains, 300-500 parts of cassava grains, 6-20 parts of oil powder, 2-9 parts of cottonseed meal, 6-12 parts of peanut kernel meal, 30-60 parts of DL-propargylglycine, 0.6-2.2 parts of feed salt, 0.04-0.25 parts of betaine, 0.01-0.06 parts of horseshoe crab antibacterial peptide, 1-10 parts of boulardii yeast powder, 12-36 parts of xylo-oligosaccharides, 1-4 parts of krill freeze-dried powder, 0.02-0.15 parts of methionine, and 0.6-2.4 parts of choline chloride.

2. The composition for reducing hydrogen sulfide emissions in pig breeding according to claim 1, characterized in that: The following components are included by weight: 850-1150 parts of wheat, 650-750 parts of soybean meal, 550-650 parts of rice bran, 300-500 parts of sorghum dry alcohol grains, 350-450 parts of cassava grains, 8-17 parts of oil powder, 3-7 parts of cottonseed meal, 7-11 parts of peanut kernel meal, 35-55 parts of DL-propargylglycine, 0.8-1.8 parts of feed salt, 0.1-0.2 parts of betaine, 0.02-0.05 parts of horseshoe crab antibacterial peptide, 2-8 parts of boulardii yeast powder, 15-30 parts of xylo-oligosaccharides, 1.5-3.5 parts of krill freeze-dried powder, 0.06-0.12 parts of methionine, and 1-2 parts of choline chloride.

3. The composition for reducing hydrogen sulfide emissions in pig breeding according to claim 1, characterized in that: The preparation of the krill freeze-dried material comprises the following steps: (A01) taking fresh Antarctic krill, cleaning and deshelling the krill to obtain krill meat; (A02) adding water to the krill meat prepared in step (A01), heating and grinding the krill meat to obtain a ground material; (A03) centrifuging the ground material in step (A02) to obtain a centrifuged meat material and a centrifuged liquid material; (A04) adding activated carbon to the centrifuged liquid in step (A03) for decolorization and filtering to obtain a decolorized liquid; (A05) mixing the decolorized liquid of step (A04) and the centrifuged meat material of step (A03) in a ratio of 1:3 to 5, and beating the mixture to obtain a slurry; (A06) stirring the slurry in step (A05) at a temperature of 70° C. to 85° C. and a pressure of 2.0 MPa to 4.0 MPa for 45 to 90 minutes to obtain a meat paste; (A07) eluting the meat paste in step (A06) with 10% to 15% anhydrous ethanol to obtain a purified material; (A08) The purified material in step (A07) is centrifuged and freeze-dried to obtain a krill freeze-dried material.

4. The method for preparing a composition for reducing hydrogen sulfide emissions during pig farming according to claim 3, characterized in that: The material-liquid ratio in the step (A02) is 1:5-20; the heating temperature in the step (A02) is 40°C-60°C; in the step (A05), the decolorized liquid and the centrifuged meat are mixed and slurried in a ratio of 1:4; the freeze-drying temperature in the step (A08) is -10°C-0°C.

5. A method for preparing a composition for reducing hydrogen sulfide emissions during pig farming, characterized in that: Includes the following step, (I) placing appropriate amounts of wheat, soybean meal, rice bran, cottonseed meal and peanut kernel meal in a grinding hopper and grinding them to obtain a grinding material; (II) feeding the crushed material in step (I) into a first mixing chamber; (III) placing appropriate amounts of sorghum dry alcohol grains and cassava wine grains into the first mixing chamber of step (II) through a first feeding hopper and mixing to obtain a mixed initial material; (IV) injecting distilled water into the mixed initial material of step (III) through a water inlet pipe and stirring and mixing to obtain a mixed liquid material; (V) sending the mixed liquid material of step (IV) into a concentration chamber for heating, stirring and concentration to obtain a concentrated material; (VI) freeze-crushing and drying the concentrated material in step (V) to obtain a freeze-dried crushed material; (VII) feeding the freeze-dried crushed material in step (VI) into a second mixing chamber through a material guide device, adding appropriate amounts of feed salt, betaine and choline chloride into the second mixing chamber through a second feed hopper, and grinding and mixing them together to obtain a ground mixed material; (VIII) passing the ground mixed material in step (VII) through a vibrating screen and then feeding it into a discharge chamber; (IX) adding appropriate amounts of oil powder, krill freeze-dried powder, DL-propargylglycine, horseshoe crab antimicrobial peptide, Saccharomyces boulardii powder, xylo-oligosaccharides and methionine into the discharge chamber of step (VIII) to obtain a nutrient mixture; (X) The nutrient mixture in step (IX) is air-dried by a hot air blower, and the air-dried dry powder is sent out and collected to obtain a finished composition.

6. The method for preparing a composition for reducing hydrogen sulfide emissions during pig farming according to claim 5, characterized in that: The material-liquid ratio of the mixed initial material to distilled water in the step (IV) is 1:1.5-3; the concentration temperature in the step (V) is 60°C-85°C; the moisture content in the concentrated material in the step (V) is 15%-20%; the freeze-drying temperature in the step (VI) is -10°C-0°C; the mesh aperture of the vibrating screen is 0.5mm-1.5mm; the air-drying temperature in the step (X) is 45°C-60°C.

7. A composition preparation device for reducing hydrogen sulfide emissions during pig farming, characterized in that: The invention comprises a shell (100), wherein a first material feeding hopper (102) and a crushing material feeding hopper (103) are provided on the top of the shell (100); the first material feeding hopper (102) and the crushing material feeding hopper (103) are connected to a first mixing chamber (200), wherein a first stirring device (201) is provided in the first mixing chamber (200); the bottom of the first mixing chamber (200) is connected to a concentration chamber (300) through a first discharge pipe (202), wherein a heater (302) and a cooler (303) are provided in the concentration chamber (300), and a second stirring device (307) is rotatably provided in the concentration chamber (300); the bottom of the concentration chamber (300) A funnel-shaped material guiding chamber (400) is connected via a fan-shaped material discharge hole (3076); the bottom of the funnel-shaped material guiding chamber (400) is connected via a material guiding pipe (401) to a second mixing chamber (600); a bow-shaped grinding chamber (602) is rotatably provided in the second mixing chamber (600); a multi-layer grinding device (700) is rotatably provided in the bow-shaped grinding chamber (602); each grinding layer of the multi-layer grinding device (700) corresponds to each grinding layer of the bow-shaped grinding chamber (602); a vibrating screen (604) is provided at the bottom of the second mixing chamber (600); and the bottom of the second mixing chamber (600) is connected to a material discharge chamber (800).

8. The composition preparation device for reducing hydrogen sulfide emissions in pig breeding process according to claim 7, characterized in that: The second stirring device (307) comprises a second driving motor (3077), the second driving motor (3077) is arranged at the bottom of the concentration chamber (300), the driving end of the second driving motor (3077) is provided with a second stirring rod (3072), the second stirring rod (3072) is rotatably arranged inside the concentration chamber (300), a plurality of stirring blades (3073) are arranged on the second stirring rod (3072), a plurality of material shifting plates (3075) are arranged on the second stirring rod (3072), and the material shifting plates (3075) are in contact with the bottom surface of the concentration chamber (300); a fan-shaped discharge hole (3076) is provided at the bottom of the concentration chamber (300), and a fan-shaped discharge valve (403) is rotatably arranged at the fan-shaped discharge hole (3076).

9. The composition preparation device for reducing hydrogen sulfide emissions in pig breeding process according to claim 7, characterized in that: The bow-shaped grinding chamber (602) has a plurality of layers of grinding cavities (6022) arranged from top to bottom, and a grinding platform (6024) is formed at the bottom of each layer of grinding cavity (6022). The grinding platform (6024) is provided with a plurality of strip-shaped material discharge holes (6023), and the strip-shaped material discharge holes (6023) of the upper layer correspond to the grinding platforms (6024) of the adjacent lower layer; the grinding platforms (6024) are rotatably matched with the multi-layer grinding device (700); the multi-layer grinding device (700) includes a main shaft Rod (701), a plurality of first driving rods (702) are arranged on the main shaft rod (701), a grinding rod (703) is rotatably sleeved on the first driving rod (702), and the grinding rod (703) is rotatably matched with the grinding platform (6024); a plurality of second driving rods (707) are arranged on the main shaft rod (701), a grinding scraper (706) is arranged on the second driving rod (707), and the grinding scraper (706) is in contact with the surface of the grinding platform (6024) of the corresponding layer.

10. The composition preparation device for reducing hydrogen sulfide emissions in pig breeding process according to claim 7, characterized in that: A hot air blower (802) is provided on the top of the discharge chamber (800), and a circular arc-shaped discharge tray (803) is slidably provided in the discharge chamber (800), and the air outlet of the hot air blower (802) points to the inside of the circular arc-shaped discharge tray (803). A third stirring device (804) is provided on the discharge chamber (800), and the stirring position of the third stirring device (804) is located inside the circular arc-shaped discharge tray (803); the third stirring device (804) includes a third swing motor (8042), and the third swing motor (8042) is provided with a third stirring device (804). 042) is arranged on the discharge chamber (800), the swing end of the third swing motor (8042) is provided with a third swing rod (8041), the end of the third swing rod (8041) away from the third swing motor (8042) is connected to an elastic telescopic rod (8044) through a connecting end (8043), and the end of the elastic telescopic rod (8044) away from the connecting end (8043) is provided with a stirring rake (8045), and the stirring rake (8045) is in contact with the bottom of the arc-shaped discharge bin (803).

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