A device and method for preparing organic compound fertilizer from tree branches

Abstract

This invention belongs to the field of organic compound fertilizer preparation, specifically disclosing a tree branch organic compound fertilizer preparation device and method, including the following steps: First, the sludge raw material is extruded using the preparation device, and a 10% NaOH solution is added to the sludge to adjust the pH of the sludge cake to 7.3-7.8. The sludge and NaOH solution are stirred, and fermented in a closed environment for 2-3 hours. After stirring and venting, sludge blanks are obtained. In this tree branch organic compound fertilizer preparation device and method, the sludge undergoes alkali fermentation, composting fermentation with the addition of tree branches and other plant materials such as cypress, and further fermentation in a closed environment to obtain the sludge organic compound fertilizer. This can effectively reduce the occurrence of anaerobic bacteria growth and foul odor caused by high protein and insufficient gas content in the sludge.

Description

Technical Field

[0001] The present invention belongs to the field of preparation of organic compound fertilizers, and particularly relates to a device for preparing a branch organic compound fertilizer and a method for preparing a branch organic compound fertilizer. Background Art

[0002] Branch sludge compost is a good soil conditioner. When the compost is used in farmland, it can increase organic matter, improve soil structure, reduce the amount of fertilizer used, and can reduce potential soil erosion. Since sewage sludge contains a large amount of microorganisms, etc., it is prone to corruption and generate gases that are unfavorable to the environment during the composting fermentation process. Platycodon grandiflorum is a plant of the genus Platycodon in the family Campanulaceae, order Asterales, class Dicotyledoneae, phylum Angiospermae, and is usually used as a medicinal material.

[0003] The existing organic compound fertilizers are fermented by adding other solutions and raw materials to dehydrated sludge. Therefore, when the organic compound fertilizers are initially fermented, it is necessary to first dehydrate the sewage and sludge, and then add the solution to the dehydrated sludge. Completion of the above steps requires the cooperation of multiple devices, resulting in low efficiency in the preparation of organic fertilizers and increasing the cost of preparing organic fertilizers. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a device for preparing a branch organic compound fertilizer and a method for preparing a branch organic compound fertilizer.

[0005] The present invention achieves the above object through the following technical solutions: automatically mixing raw materials, improving the efficiency of coating, and at the same time being able to reduce waste of raw materials.

[0006] A method for preparing a branch organic compound fertilizer includes the following steps

[0007] S1: First, use the preparation device to extrude the sludge raw material, and add a 10% NaOH solution to the sludge to adjust the pH of the mud cake to 7.3 - 7.8. Stir the sludge and the NaOH solution, and ferment for 2 - 3 h in a closed environment. After stirring and exhausting, obtain a sludge blank;

[0008] S2: By weight, mix 200 - 500 parts of the sludge blank, 200 - 500 parts of crushed and ground branches, 200 - 500 parts of platycodon residue, 200 - 1000 parts of defatted soybean meal, and 200 - 500 parts of corn meal. Control the moisture content between 50% - 60%, and add compound bacteria for composting fermentation for 3 - 4 days. The compound bacteria include Bacillus subtilis, Bacillus laterosporus, Saccharomyces cerevisiae, and Aspergillus niger;

[0009] S3: Add 100-200 parts by weight of rice bran and 100-200 parts by weight of water to the obtained compost, adjust the pH to 6.0-7.0 and ferment in a closed environment, ensuring that the core temperature of fermentation is below 35℃ for 1-2 hours. The fermented material after cooling is sludge organic compound fertilizer.

[0010] The proportions are determined before step S1. The methods for determining the proportions include:

[0011] Step S101: Randomly generate multiple ingredient ratios for preparing sludge organic compound fertilizer, and generate ratio features based on the ingredient ratios;

[0012] The proportioning characteristics are expressed as: A={A1…A8}, where A1…A8 represent the weight parts of sludge raw material, the weight parts of crushed and ground branches, the weight parts of stalk residue, the weight parts of defatted soybean meal, the weight parts of corn meal, the weight parts of compound bacteria, the weight parts of rice bran, and the weight parts of water, respectively.

[0013] Step S102: Randomly select n sampling points on the sludge raw material to collect the component content of the sludge raw material, and generate content characteristics based on the component content of the sludge raw material.

[0014] The components of sludge raw materials include: inorganic matter, nitrogen salts, phosphate salts, potassium salts, and organic matter;

[0015] Content characteristic B is represented as: in These represent the inorganic matter content, nitrogen salt content, phosphorus salt content, potassium salt content, and organic matter content of the sludge raw material at the first sampling point, respectively. These represent the inorganic matter content, nitrogen salt content, phosphorus salt content, potassium salt content, and organic matter content of the sludge raw material at the nth sampling point, respectively, in mg / kg.

[0016] Step S103: Input the content features and proportion features into the neural network model. The neural network model includes a first hidden layer, a second hidden layer, a splicer, a third hidden layer, and a fully connected layer.

[0017] The first hidden layer takes the content features as input and outputs a coding matrix.

[0018] The second hidden layer takes the encoding matrix as input and outputs the first vector.

[0019] The splicer is used to splice the proportion feature and the first vector to obtain the mixed vector;

[0020] The third hidden layer inputs the mixing vector, the output of the third hidden layer inputs the fully connected layer, and the fully connected layer outputs the fertility value of the sludge organic compound fertilizer.

[0021] The formula for calculating the fertility value of the sludge organic compound fertilizer labeled in the training samples during training is as follows:

[0022]

[0023] Where S represents the fertility value of sludge organic compound fertilizer, W1, W2, W3, and W4 represent the proportion coefficients of nitrogen, phosphorus, potassium, and organic matter in sludge organic compound fertilizer, respectively, and X1, X2, X3, and X4 represent the nitrogen content, phosphorus content, potassium content, and organic matter content in sludge organic compound fertilizer, respectively.

[0024] The formula for calculating the first vector matrix q of the first hidden layer is as follows:

[0025] q = W q *B

[0026] Where q represents the first vector matrix, W q Let B represent the first weight matrix, and let B represent the content feature.

[0027] The formula for calculating the second vector matrix k of the first hidden layer is as follows:

[0028] k = W k *B

[0029] Where k represents the second vector matrix, W k Let B represent the second weight matrix, and let B represent the content feature.

[0030] The formula for calculating the third vector matrix v of the first hidden layer is as follows:

[0031] v = W v *B

[0032] Where v represents the third vector matrix, W v Let B represent the third weight matrix, and let B represent the content feature.

[0033] The formula for calculating the attention score in the first hidden layer is as follows:

[0034] z = softmax(vtanh(q+k)) T )q

[0035] Where z represents the encoding matrix, v represents the third vector matrix, q represents the first vector matrix, k represents the second vector matrix, T represents the matrix transpose operation, and tanh represents the hyperbolic tangent function.

[0036] As a further optimization of the present invention, the preparation device includes a preparation barrel, which is vertically arranged. A feed inlet is provided at the top of the preparation barrel, with the feed inlet opening upward. A filter cylinder is rotatably inserted inside the preparation barrel, which is vertically arranged with its opening facing upward. Filter holes are provided on the outside of the filter cylinder, and an opening and closing structure is provided on the edge of the filter holes to control the opening and closing of the filter holes. A rotating mechanism is provided outside the filter cylinder to drive the filter cylinder to rotate. A material cylinder is detachably installed on the top of the preparation barrel, and both the material cylinder and the feed inlet are located above the filter cylinder. An extruder is provided inside the filter cylinder, and a lifting mechanism and an adjusting mechanism are provided outside the extruder. The lifting mechanism drives the extruder to rise and fall, and the adjusting mechanism adjusts the shape of the extruder and causes adjacent sets of extruders to rub against each other.

[0037] As a further optimization of the present invention, the opening and closing structure includes a baffle, a hinge shaft, and a B spring. The baffle is rotatably connected to the outside of the filter cylinder through the hinge shaft. The baffle completely covers the filter holes. The end of the baffle away from the hinge shaft is inclined. The B spring is movably sleeved on the outside of the hinge shaft. The B spring and the baffle are fixedly connected.

[0038] As a further optimization of the present invention, the rotating mechanism includes a shaft, a D gear, and an E gear. The shaft is rotatably inserted inside the preparation barrel and is arranged vertically. One end of the shaft is provided with a driving member, which drives the shaft to rotate. The D gear is fixedly sleeved on the outside of the shaft, and the E gear is fixedly sleeved on the outside of the filter cartridge. The D gear and the E gear mesh with each other.

[0039] As a further optimization of the present invention, the driving component includes a motor, which is fixedly installed at the upper end of the preparation barrel. The motor is vertically arranged, and the output end of the motor passes through the preparation barrel and extends into the interior of the preparation barrel. The output end of the motor is fixedly connected to one end of the shaft.

[0040] As a further optimization of the present invention, the lifting mechanism includes a threaded rod and a B gear. The threaded rod is disposed above the extruder and is vertically arranged. The threaded rod passes through the preparation barrel and extends to the top of the preparation barrel. The B gear is rotatably mounted above the preparation barrel. The threaded rod and the B gear are threadedly connected. A rotating structure is provided on the outside of the B gear, and the rotating structure drives the B gear to rotate.

[0041] As a further optimization of the present invention, the rotating structure includes a C gear and a B conveyor belt. The C gear is fixedly sleeved outside the motor output end, and the B conveyor belt is movably sleeved outside the B gear and the C gear.

[0042] As a further optimization of the present invention, the adjustment mechanism includes a telescopic component, a rotating component, and a crushing component. The telescopic component includes a telescopic member, an A spring, a connecting rope, a straight shaft, an A gear, and an A conveyor belt. The telescopic member is slidably connected to the extrusion member via the A spring. The telescopic member reciprocates along the length direction of the extrusion member. The straight shaft is rotatably inserted inside the extrusion member and is vertically arranged. The straight shaft is connected to the telescopic member via the connecting rope. The straight shaft winds and unwinds the connecting rope. The A gear is fixedly installed above the straight shaft. The A conveyor belt is movably sleeved outside the A gear. The rotating component drives two adjacent sets of extrusion members to rub against each other. The crushing component increases the friction between two adjacent sets of extrusion members.

[0043] As a further optimization of the present invention, the rotating assembly includes a rotating shaft, a cam, a guide groove, a connecting rod, and a support frame. The rotating shaft is rotatably installed below the threaded rod and is horizontally positioned. The axial direction of the rotating shaft is perpendicular to the length direction of the extruder. The cam is fixedly sleeved on the outside of the rotating shaft. The guide groove is opened at the edge of the cam. One end of the connecting rod is slidably inserted into the inside of the guide groove, and the other end of the connecting rod is rotatably connected to the eccentric position of the extruder. The extruder is rotatably connected to the rotating shaft through the support frame.

[0044] As a further optimization of the present invention, the rolling assembly includes a support plate, an elastic element, a rolling ball, a hinged plate, and a through hole. The support plate is slidably inserted into the extruder through the elastic element and is arranged vertically. The rolling ball is rotatably installed on one side of the support plate. The through hole is opened on the outside of the extruder and corresponds one-to-one with the rolling ball. The hinged plate is hinged inside the through hole and the hinged plate and the rolling ball are in contact and fit together.

[0045] The beneficial effects of this invention are as follows: In the preparation method of the organic compound fertilizer made from tree branches and sludge of this invention, the sludge is subjected to alkali fermentation, composting fermentation with the addition of plant materials such as tree branches and cypress, and further fermentation in a closed environment to obtain the organic compound fertilizer made from the sludge. This can effectively reduce the occurrence of malodorous phenomena caused by the growth of anaerobic bacteria due to high protein and insufficient gas content in the sludge.

[0046] The fermented material obtained after fermentation in this invention has a strong adhesive strength, greater than 0.7 MPa. It can encapsulate 2-chloro-6-trichloromethylpyrimidine microcapsule synergists. The resulting sludge organic compound fertilizer, obtained after drying and solidification, can extend the duration of the 2-chloro-6-trichloromethylpyrimidine microcapsule synergists' effectiveness in the soil. It eliminates the need for complex encapsulation and granulation processes and the addition of other non-degradable chemicals, allowing it to be completely converted into nutrients for crops in the soil without causing pollution. The compound fertilizer formed by fermenting sludge and sludge, and using 2-chloro-6-trichloromethylpyrimidine microcapsule synergists, is ultimately presented in the form of larger capsules. The fermented material acts as the capsule shell, supplementing the fertilizer needed by crops. During long-term use, the 2-chloro-6-trichloromethylpyrimidine microcapsule synergists exert a sustained synergistic effect through slow release.

[0047] This invention can add the solution to the dehydrated sludge in a timely manner, and can also make the solution and sludge fully mixed by kneading, which is beneficial to improving the efficiency of organic fertilizer preparation. Moreover, when preparing organic fertilizer, multiple devices are not required, which can effectively reduce the cost of organic fertilizer preparation. Attached Figure Description

[0048] Figure 1 This is a flowchart of the preparation method of the present invention;

[0049] Figure 2 This is a schematic diagram of the apparatus used in the preparation method of the present invention;

[0050] Figure 3 This is the apparatus used in the preparation method of the present invention. Figure 2 Enlarged view of point A;

[0051] Figure 4 This is a partial structural diagram of the apparatus used in the preparation method of the present invention;

[0052] Figure 5 This is the present invention. Figure 3 A top view of a partial structure of the apparatus used in the preparation method;

[0053] Figure 6 This is a cross-sectional view of a portion of the apparatus used in the preparation method of this invention;

[0054] Figure 7 This is the present invention. Figure 6 Top view of part of the apparatus used in the preparation method;

[0055] Figure 8 This is a perspective view of a partial structure of the apparatus used in the preparation method of this invention;

[0056] Figure 9 This is the apparatus used in the preparation method of the present invention. Figure 8 Enlarged view of point B.

[0057] In the diagram: 1. Preparation tank; 11. Feed inlet; 12. Filter cylinder; 13. Extrusion part; 14. Material cylinder; 21. Telescopic part; 22. Spring A; 23. Connecting rope; 31. Straight shaft; 32. Gear A; 33. Conveyor belt A; 41. Support plate; 42. Elastic part; 43. Crushing ball; 44. Opening and closing plate; 45. Through hole; 51. Rotating shaft; 52. Cam; 53. Guide groove; 54. Connecting rod; 55. Support frame; 61. Filter hole; 62. Baffle; 63. Hinge shaft; 64. Spring B; 62. Support frame; 71. Threaded rod; 72. Gear B; 81. Gear C; 82. Conveyor belt B; 83. Motor; 91. Shaft; 92. Gear D; 93. Gear E. Detailed Implementation

[0058] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0059] like Figure 1 - Figure 9 As shown, a method for preparing a tree branch organic compound fertilizer includes the following steps:

[0060] S1: First, the sludge raw material is extruded using a preparation device, and a 10% NaOH solution is added to the sludge to adjust the pH of the sludge cake to 7.3-7.8. The sludge and NaOH solution are stirred and fermented in a closed environment for 2-3 hours. After stirring and venting, sludge cake is obtained.

[0061] S2: By weight, mix 200-500 parts of sludge material, 200-500 parts of crushed and ground tree branches (non-trunk of poplar trees), 200-500 parts of platycodon residue, 200-1000 parts of defatted soybean meal, and 200-500 parts of corn meal, control the moisture content between 50% and 60%, add compound bacteria for composting and fermentation for 3-4 days. The compound bacteria include Bacillus spp., Bacillus laterosporus, yeast, and Aspergillus niger.

[0062] S3: Add 100-200 parts by weight of rice bran and 100-200 parts by weight of water to the obtained compost, adjust the pH to 6.0-7.0 and ferment in a closed environment, ensuring that the core temperature of fermentation is below 35℃ for 1-2 hours. The fermented material after cooling is sludge organic compound fertilizer.

[0063] The preparation device includes a preparation barrel 1, which is vertically arranged. A feed inlet 11 is provided on the top of the preparation barrel 1, with the feed inlet 11 opening upward. A filter cylinder 12 is rotatably inserted inside the preparation barrel 1, which is also vertically arranged with its opening facing upward. Filter holes 61 are provided on the outside of the filter cylinder 12, and an opening and closing structure is provided on the edge of the filter holes 61 to control the opening and closing of the filter holes 61. A rotating mechanism is provided on the outside of the filter cylinder 12 to drive the filter cylinder 12 to rotate. A material cylinder 14 is detachably installed on the top of the preparation barrel 1. Both the material cylinder 14 and the feed inlet 11 are located above the filter cylinder 12. An extruder 13 is provided inside the filter cylinder 12. A lifting mechanism and an adjusting mechanism are provided on the outside of the extruder 13. The lifting mechanism drives the extruder 13 to rise and fall, and the adjusting mechanism adjusts the shape of the extruder 13 and causes adjacent sets of extruders 13 to rub against each other.

[0064] The opening and closing structure includes a baffle 62, a hinge shaft 63, and a B spring 64. The baffle 62 is rotatably connected to the outside of the filter cylinder 12 via the hinge shaft 63. The baffle 62 completely covers the filter holes 61. The end of the baffle 62 away from the hinge shaft 63 is inclined. The B spring 64 is movably sleeved on the outside of the hinge shaft 63. The B spring 64 and the baffle 62 are fixedly connected.

[0065] The rotating mechanism includes a shaft 91, a D gear 92, and an E gear 93. The shaft 91 is rotatably inserted inside the preparation barrel 1 and is arranged vertically. One end of the shaft 91 is provided with a driving component, which drives the shaft 91 to rotate. The D gear 92 is fixedly sleeved on the outside of the shaft 91, and the E gear 93 is fixedly sleeved on the outside of the filter cartridge 12. The D gear 92 and the E gear 93 mesh with each other.

[0066] The driving component includes a motor 83, which is fixedly installed at the upper end of the preparation tank 1. The motor 83 is vertically positioned, and its output end passes through the preparation tank 1 and extends into the interior of the preparation tank 1. The output end of the motor 83 is fixedly connected to one end of the shaft 91.

[0067] The lifting mechanism includes a threaded rod 71 and a B gear 72. The threaded rod 71 is positioned above the extruder 13 and is vertically oriented. The threaded rod 71 passes through the preparation barrel 1 and extends to the top of the preparation barrel 1. The B gear 72 is rotatably mounted above the preparation barrel 1. The threaded rod 71 and the B gear 72 are threadedly connected. The B gear 72 has a rotating structure on its exterior, which drives the B gear 72 to rotate.

[0068] The rotating structure includes a C gear 81 and a B conveyor belt 82. The C gear 81 is fixedly mounted outside the output end of the motor 83, and the B conveyor belt 82 is movably mounted outside the B gear 72 and the C gear 81.

[0069] The adjustment mechanism includes a telescopic component, a rotating component, and a crushing component. The telescopic component includes a telescopic member 21, an A spring 22, a connecting rope 23, a straight shaft 31, an A gear 32, and an A conveyor belt 33. The telescopic member 21 is slidably connected to the extruder 13 via the A spring 22. The telescopic member 21 reciprocates along the length of the extruder 13. The straight shaft 31 is rotatably inserted inside the extruder 13 and is vertically arranged. The straight shaft 31 is connected to the telescopic member 21 via the connecting rope 23. The straight shaft 31 winds up and unwinds the connecting rope 23. The A gear 32 is fixedly installed above the straight shaft 31. The A conveyor belt 33 is movably sleeved on the outside of the A gear 32. The rotating component drives the two adjacent sets of extruders 13 to rub against each other. The crushing component increases the friction between the two adjacent sets of extruders 13.

[0070] The straight shaft 31 can be driven to rotate by a motor.

[0071] The rotating assembly includes a rotating shaft 51, a cam 52, a guide groove 53, a connecting rod 54, and a support frame 55. The rotating shaft 51 is rotatably mounted below the threaded rod 71. The rotating shaft 51 is horizontally positioned, and its axial direction is perpendicular to the length direction of the extruder 13. The cam 52 is fixedly sleeved on the outside of the rotating shaft 51. The guide groove 53 is opened at the edge of the cam 52. One end of the connecting rod 54 is slidably inserted into the inside of the guide groove 53, and the other end of the connecting rod 54 is rotatably connected to the extruder 13 at an eccentric position. The extruder 13 is rotatably connected to the rotating shaft 51 through the support frame 55.

[0072] The compaction assembly includes a support plate 41, an elastic element 42, a compaction ball 43, a hinge plate 44, and a through hole 45. The support plate 41 is slidably inserted into the extruder 13 via the elastic element 42 and is vertically arranged. The compaction ball 43 is rotatably mounted on one side of the support plate 41. The through hole 45 is opened on the outside of the extruder 13 and corresponds one-to-one with the compaction ball 43. The hinge plate 44 is hinged inside the through hole 45 and the hinge plate 44 and the compaction ball 43 are in contact and engaged.

[0073] The process flow of the device proposed in this embodiment is as follows:

[0074] Sludge is poured into the preparation tank 1 through the feed inlet 11. The feed inlet 11 is located above the filter cylinder 12, allowing the sludge to fall onto the top of the filter cylinder 12. In the initial state, the motor drives the straight shaft 31 to rotate, and the straight shaft 31 unwinds the connecting rope 23. Under the elastic force of spring A 22, spring A 22 pushes the telescopic member 21 to extend out from the inside of the extrusion member 13. At this time, the telescopic member 21 is in contact with the inner wall of the filter cylinder 12.

[0075] Motor 83 drives shaft 91 to rotate. Since gear D 92 and gear E 93 mesh with each other, shaft 91 can drive filter cartridge 12 to rotate through gear E 93. When filter cartridge 12 rotates, under the combined action of centrifugal force and wind force, baffle 62 can rotate around hinge shaft 63. At this time, spring B 64 is deformed by force, baffle 62 separates from the inner wall of filter cartridge 12, so baffle 62 no longer blocks filter hole 61, filter hole 61 is in an open state, and when filter cartridge 12 rotates, it can throw out water from inside the sludge through centrifugal force.

[0076] At the same time, motor 83 drives gear C 81 to rotate, and gear C 81 drives gear B 72 to rotate via conveyor belt B 82. Gear B 72 is threadedly connected to threaded rod 71. Gear B 72 drives threaded rod 71 to move downward. When threaded rod 71 moves downward, it drives extruder 13 to move downward synchronously. When extruder 13 moves downward, it squeezes the sludge inside filter cartridge 12. The squeezed water can flow through filter holes 61 into the preparation tank 1, thereby dewatering the sludge again and improving the sludge drying effect.

[0077] After the sludge is dewatered, the motor drives the straight shaft 31 to rotate. Since the straight shaft 31 is connected to the A gear 32 and the A transmission belt, it should be noted that the two adjacent sets of extrusion parts 13 are symmetrically arranged and the two adjacent sets of extrusion parts 13 are staggered. The A gear 32 on the same side is connected by the A transmission belt 33. When the straight shaft 31 rotates, it can wind up the connecting rope 23. The connecting rope 23 pulls the telescopic part 21 to move into the interior of the extrusion part 13. At this time, the A spring 22 is deformed by force.

[0078] At the same time, the telescopic component 21 pushes the two sets of support plates 41 away from each other. At this time, the elastic component 42 is deformed by force, and the support plate 41 drives the rolling ball 43 to move synchronously. The rolling ball 43 pushes the opening and closing plate 44 to open, and the rolling ball 43 extends out of the through hole 45 and protrudes to the outside of the extrusion component 13.

[0079] Motor 83 rotates in reverse, thereby driving filter cartridge 12 to rotate in reverse. Under the elastic force of spring B 64, spring B 64 drives baffle 62 to block filter cartridge 12. At this time, the feed cylinder 14 adds solution into the sludge. When filter cartridge 12 rotates, it can drive sludge and solution to rotate synchronously, mixing sludge and solution. At the same time, threaded rod 71 moves upward, driving extruder 13 to move upward synchronously. Motor drives rotating shaft 51 to rotate synchronously, and rotating shaft 51 can drive cam 52 to rotate. Since one end of the connecting rod 54 is connected to the guide groove 53 on the cam 52, and the other end of the connecting rod 54 is rotatably connected to the eccentric position of the extruder 13, under the action of the support frame 55, the cam 52 can drive the extruder 13 to rotate around the rotating shaft 51 when it rotates. The two adjacent sets of extruders 13 rotate in opposite directions, so that the sludge and solution can be kneaded and mixed. The sludge squeezed between the two sets of extruders 13, such as sludge, can be crushed by the crushing ball 43, which is beneficial to improving the mixing effect of sludge and solution.

[0080] Through the above-described steps, the method for preparing the sludge organic compound fertilizer of this invention involves sequentially subjecting the sludge to alkaline fermentation, composting with the addition of plant materials such as branches and stalks, and further fermentation in a sealed environment to obtain the sludge organic compound fertilizer. This effectively reduces the occurrence of malodorous phenomena caused by the growth of anaerobic bacteria due to the high protein content and insufficient gas content of the sludge. Furthermore, this invention achieves mixed composting of animal and plant materials, including sludge, branches, stalk residue, defatted soybean meal, and corn meal, resulting in a more balanced composition of trace elements such as C, N, K, and Ca in the obtained organic compound fertilizer.

[0081] The fermented material obtained after fermentation in this invention has a strong adhesive strength, greater than 0.7 MPa. It can encapsulate 2-chloro-6-trichloromethylpyrimidine microcapsule synergists. The resulting sludge organic compound fertilizer, obtained after drying and solidification, can extend the duration of the 2-chloro-6-trichloromethylpyrimidine microcapsule synergists' effectiveness in the soil. It eliminates the need for complex encapsulation and granulation processes and the addition of other non-degradable chemicals, allowing it to be completely converted into nutrients for crops in the soil without causing pollution. The compound fertilizer formed by fermenting sludge and sludge, and using 2-chloro-6-trichloromethylpyrimidine microcapsule synergists, is ultimately presented in the form of larger capsules. The fermented material acts as the capsule shell, supplementing the fertilizer needed by crops. During long-term use, the 2-chloro-6-trichloromethylpyrimidine microcapsule synergists exert a sustained synergistic effect through slow release.

[0082] This invention can add the solution to the dehydrated sludge in a timely manner, and can also make the solution and sludge fully mixed by kneading, which is beneficial to improving the efficiency of organic fertilizer preparation. Moreover, when preparing organic fertilizer, multiple devices are not required, which can effectively reduce the cost of organic fertilizer preparation.

[0083] The main components of sludge vary depending on the source of the sludge raw material. In the above process, the ratio of added solution and ingredients to sludge raw material is fixed. This ratio is determined based on the composition of a certain sludge raw material to maximize the fertility of the sludge organic compound fertilizer.

[0084] The proportions are determined before step S1. The methods for determining the proportions include:

[0085] Step S101: Randomly generate multiple ingredient ratios for preparing sludge organic compound fertilizer, and generate ratio features based on the ingredient ratios;

[0086] The proportioning characteristics are expressed as: A={A1…A8}, where A1…A8 represent the weight parts of sludge raw material, the weight parts of crushed and ground branches, the weight parts of platycodon residue, the weight parts of defatted soybean meal, the weight parts of corn meal, the weight parts of compound bacteria, the weight parts of rice bran, and the weight parts of water (in step S3), respectively.

[0087] Step S102: Randomly select n sampling points on the sludge raw material to collect the component content of the sludge raw material, and generate content characteristics based on the component content of the sludge raw material.

[0088] The components of sludge raw materials include: inorganic matter, nitrogen salts, phosphate salts, potassium salts, and organic matter;

[0089] Content characteristic B is represented as: in These represent the inorganic matter content, nitrogen salt content, phosphorus salt content, potassium salt content, and organic matter content of the sludge raw material at the first sampling point, respectively. These represent the inorganic matter content, nitrogen salt content, phosphorus salt content, potassium salt content, and organic matter content of the sludge raw material at the nth sampling point, respectively, in mg / kg.

[0090] Step S103: Input the content features and proportion features into the neural network model. The neural network model includes a first hidden layer, a second hidden layer, a splicer, a third hidden layer, and a fully connected layer.

[0091] The first hidden layer takes the content features as input and outputs a coding matrix.

[0092] The second hidden layer takes the encoding matrix as input and outputs the first vector.

[0093] The splicer is used to splice the proportion feature and the first vector to obtain the mixed vector;

[0094] The third hidden layer inputs the mixing vector, the output of the third hidden layer inputs the fully connected layer, and the fully connected layer outputs the fertility value of the sludge organic compound fertilizer.

[0095] The formula for calculating the fertility value of the sludge organic compound fertilizer labeled in the training samples during training is as follows:

[0096]

[0097] Where S represents the fertility value of sludge organic compound fertilizer, W1, W2, W3, and W4 represent the proportion coefficients of nitrogen, phosphorus, potassium, and organic matter in sludge organic compound fertilizer, respectively, and X1, X2, X3, and X4 represent the nitrogen content, phosphorus content, potassium content, and organic matter content in sludge organic compound fertilizer, respectively.

[0098] The formula for calculating the first vector matrix q of the first hidden layer is as follows:

[0099] q = W q *B

[0100] Where q represents the first vector matrix, W q Let B represent the first weight matrix, and let B represent the content feature.

[0101] The formula for calculating the second vector matrix k of the first hidden layer is as follows:

[0102] k = W k *B

[0103] Where k represents the second vector matrix, W k Let B represent the second weight matrix, and let B represent the content feature.

[0104] The formula for calculating the third vector matrix v of the first hidden layer is as follows:

[0105] v = W v *B

[0106] Where v represents the third vector matrix, W v Let B represent the third weight matrix, and let B represent the content feature.

[0107] The formula for calculating the attention score in the first hidden layer is as follows:

[0108] z = softmax(vtanh(q+k)) T )q

[0109] Where z represents the encoding matrix, v represents the third vector matrix, q represents the first vector matrix, k represents the second vector matrix, T represents the matrix transpose operation, and tanh represents the hyperbolic tangent function;

[0110] In one embodiment of the present invention, the nitrogen, phosphorus and potassium contents in the sludge organic compound fertilizer are obtained by a rapid fertilizer detection instrument, and the organic matter content in the sludge organic compound fertilizer is obtained by a spectrometer.

[0111] In one embodiment of the present invention, the second hidden layer is constructed based on a convolutional layer, and the third hidden layer is constructed based on a feedforward neural network;

[0112] Step S104: Select the ratio corresponding to the ratio with the greatest fertility of sludge organic compound fertilizer as the final ratio.

[0113] The above methods can be used to determine the optimal ratio for organic compound fertilizer production based on sludge, thereby obtaining a superior product.

[0114] The embodiments of this example have been described above. However, this example is not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this example, and all of them are within the protection scope of this example.

Claims

1. A device for preparing organic compound fertilizer from tree branches, characterized in that: The organic compound fertilizer preparation device for tree branches includes a preparation tank (1), which is set vertically. A feed inlet (11) is opened at the top of the preparation tank (1), with the feed inlet (11) opening upwards. A filter cylinder (12) is rotatably inserted inside the preparation tank (1), which is set vertically with its opening facing upwards. A filter hole (61) is opened on the outside of the filter cylinder (12), and an opening and closing structure is provided on the edge of the filter hole (61). The opening and closing structure controls the opening and closing of the filter hole (61). The filter cylinder (12) has a filter hole (61) opening on its outside. The part is equipped with a rotating mechanism, which drives the filter cylinder (12) to rotate. A material cylinder (14) is detachably installed above the preparation barrel (1). The material cylinder (14) and the feed inlet (11) are both located above the filter cylinder (12). An extruder (13) is installed inside the filter cylinder (12). A lifting mechanism and an adjusting mechanism are installed outside the extruder (13). The lifting mechanism drives the extruder (13) to rise and fall, and the adjusting mechanism adjusts the shape of the extruder (13) and drives the two adjacent extruders (13) to rub against each other. The adjustment mechanism includes a telescopic component, a rotating component, and a rolling component. The telescopic component includes a telescopic member (21), an A spring (22), a connecting rope (23), a straight shaft (31), an A gear (32), and an A conveyor belt (33). The telescopic member (21) is slidably connected to the extruder (13) through the A spring (22). The telescopic member (21) moves back and forth along the length of the extruder (13). The straight shaft (31) is rotatably inserted inside the extruder (13). The straight shaft (31) is vertically arranged. The straight shaft (31) is connected to the telescopic member (21) through the connecting rope (23). The straight shaft (31) winds up and unwinds the connecting rope (23). The A gear (32) is fixedly installed above the straight shaft (31). The A conveyor belt (33) is movably sleeved on the outside of the A gear (32). The rotating component drives the two adjacent extruders (13) to rub against each other. The rolling component increases the friction between the two adjacent extruders (13).

2. The apparatus for preparing organic compound fertilizer from tree branches according to claim 1, characterized in that: The opening and closing structure includes a baffle (62), a hinge shaft (63), and a B spring (64). The baffle (62) is rotatably connected to the outside of the filter cylinder (12) through the hinge shaft (63). The baffle (62) completely covers the filter hole (61). The end of the baffle (62) away from the hinge shaft (63) is inclined. The B spring (64) is movably sleeved on the outside of the hinge shaft (63). The B spring (64) and the baffle (62) are fixedly connected. The rotating mechanism includes a shaft (91), a D gear (92), and an E gear (93). The shaft (91) is rotatably inserted inside the preparation barrel (1). The shaft (91) is vertically arranged. One end of the shaft (91) is provided with a driving component. The driving component drives the shaft (91) to rotate. The D gear (92) is fixedly sleeved on the outside of the shaft (91). The E gear (93) is fixedly sleeved on the outside of the filter cylinder (12). The D gear (92) and the E gear (93) mesh with each other. The driving component includes a motor (83), which is fixedly installed on the upper end of the preparation barrel (1). The motor (83) is set vertically, and the output end of the motor (83) passes through the preparation barrel (1) and extends into the interior of the preparation barrel (1). The output end of the motor (83) is fixedly connected to one end of the shaft (91).

3. The apparatus for preparing organic compound fertilizer from tree branches according to claim 1, characterized in that: The lifting mechanism includes a threaded rod (71) and a B gear (72). The threaded rod (71) is positioned above the extruder (13). The threaded rod (71) is vertically positioned and passes through the preparation barrel (1) and extends to the top of the preparation barrel (1). The B gear (72) is rotatably mounted above the preparation barrel (1). The threaded rod (71) and the B gear (72) are threadedly connected. The B gear (72) has a rotating structure on its exterior, which drives the B gear (72) to rotate.

4. The apparatus for preparing organic compound fertilizer from tree branches according to claim 3, characterized in that: The rotating structure includes a C gear (81) and a B conveyor belt (82). The C gear (81) is fixedly mounted outside the output end of the motor (83), and the B conveyor belt (82) is movably mounted outside the B gear (72) and the C gear (81).

5. The apparatus for preparing organic compound fertilizer from tree branches according to claim 1, characterized in that: The rotating assembly includes a rotating shaft (51), a cam (52), a guide groove (53), a connecting rod (54), and a support frame (55). The rotating shaft (51) is rotatably mounted below the threaded rod (71). The rotating shaft (51) is horizontally positioned, and the axial direction of the rotating shaft (51) is perpendicular to the length direction of the extruder (13). The cam (52) is fixedly sleeved on the outside of the rotating shaft (51). The guide groove (53) is opened at the edge of the cam (52). One end of the connecting rod (54) is slidably inserted into the inside of the guide groove (53). The other end of the connecting rod (54) is rotatably connected to the extruder (13) at an eccentric position. The extruder (13) is rotatably connected to the rotating shaft (51) through the support frame (55).

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