Fish protein amino acid foliar fertilizer using steam explosion technology

Abstract

The invention relates to the technical field of fish protein amino acid foliar fertilizers, in particular to a fish protein amino acid foliar fertilizer using a steam explosion technology, and the preparation process comprises the following steps: sequentially performing impurity removal, steam explosion, cooling and pressure reduction treatment on a pretreated fish and shrimp mixed material by using a steam explosion device to output a steam explosion material; sequentially performing protein dissolution, amino acid extraction, nutrient substance and auxiliary component addition and concentration operation on the precipitated protein liquid to output the fish protein amino acid leaf fertilizer; determining the preparation state of the fish protein amino acid foliar fertilizer based on the fluctuation amplitude of the pressure in the steam explosion device; if the preparation state is an unstable state, adjusting the steam explosion duration of the fish and shrimp mixed material; and if the removal effect of the impurities in the fish protein amino acid foliar fertilizer does not meet the requirement, determining the rotating speed of a rotating drum of a centrifugal machine. The preparation stability of the fish protein amino acid leaf fertilizer in the steam explosion technology is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fish protein amino acid foliar fertilizer, in particular to a fish protein amino acid foliar fertilizer utilizing steam explosion technology. Background Art

[0002] In the prior art, the use of steam explosion technology to prepare fish protein amino acid foliar fertilizer is an innovative fertilizer production method. This method combines steam explosion technology with amino acid fertilizer production technology to improve the fertilizer efficiency and absorption rate of fish protein amino acid foliar fertilizer.

[0003] Chinese Patent Publication No.: CN112047779A discloses a foliar fertilizer containing fish protein amino acids and a preparation method thereof, which is prepared from the following raw materials: by weight, 3-5 parts of oligosaccharide extract, 20-40 parts of pomace enzymatic hydrolyzate, 40-50 parts of fermented liquid of aquatic product processing waste, 5-8 parts of adsorption carrier, 10-15 parts of live bacteria culture liquid, 5-8 parts of dispersant, and 40-50 parts of water; the oligosaccharide extract is prepared from shrimp shells, crab shells, and brewer's yeast culture in a mass ratio of 15-18:6-9:1-2; the brewer's yeast culture is prepared from 5 -8 parts of potatoes, 1-2 parts of alfalfa, 0.3-0.5 parts of brewer's yeast, and 15-18 parts of clean water are fermented; the pomace enzymatic hydrolyzate is made from 80-90 parts of kiwi pomace, 30-50 parts of apple pomace, 30-50 parts of sweet potato pomace, 15-18 parts of orange pomace, 5-8 parts of cellulase, and 3-6 parts of pectinase; the aquatic product processing waste material fermentation liquid is made from fish, shellfish, and aquatic product processing waste material fermentation; the live bacteria culture liquid is mixed with photosynthetic bacteria, nitrogen-fixing bacteria, peptone, and water in a mass ratio of 1-2:3-5:10:50-80. It can be seen that the foliar fertilizer containing fish protein amino acids and the preparation method thereof have the problem of many operating steps and long preparation time, which leads to a decrease in the preparation stability of the fish protein amino acid foliar fertilizer. Summary of the invention

[0004] To this end, the present invention provides a fish protein amino acid foliar fertilizer using steam explosion technology, which is used to overcome the problem in the prior art that the preparation stability of the fish protein amino acid foliar fertilizer is reduced due to many operating steps and long preparation time.

[0005] To achieve the above-mentioned purpose, the present invention provides a fish protein amino acid foliar fertilizer using steam explosion technology, and its preparation process comprises: using a steam explosion device to sequentially remove impurities, steam explode, cool and reduce the pressure of pretreated fish and shrimp mixture materials to output steam-exploded materials, filtering the steam-exploded materials and then using a centrifuge to perform centrifugal operation to output a centrifuged solution; using a precipitation kettle to precipitate protein in the centrifuged solution to output a supernatant and a precipitated protein liquid, sequentially performing protein dissolution, amino acid extraction, addition of nutrients and auxiliary components and concentration operations on the precipitated protein liquid to output fish protein amino acid foliar fertilizer; using a pressure sensor to detect the air pressure in the steam explosion device; determining the preparation state of the fish protein amino acid foliar fertilizer based on the fluctuation amplitude of the pressure in the steam explosion device; if the preparation state is unstable If the fish protein amino acid foliar fertilizer is in a stable state, the steam explosion time of the fish and shrimp mixture is adjusted, or the removal effect of impurities in the fish protein amino acid foliar fertilizer is determined based on the impurity content in the fish protein amino acid foliar fertilizer; if the removal effect of impurities in the fish protein amino acid foliar fertilizer does not meet the requirements, the drum speed of the centrifuge is determined or the temperature difference between the top and the bottom of the precipitation kettle is determined based on the concentration of amino acids in the fish protein amino acid foliar fertilizer; wherein the components and proportions of the fish protein amino acid foliar fertilizer are 25-40 parts of amino acids, 10-20 parts of small peptides, 3-5 parts of calcium, 0.2-0.5 parts of iron, 0.05-0.2 parts of manganese, 0.02 parts-0.1 parts of zinc, 0.01-0.05 parts of copper, 0.05-0.3 parts of boron, 4-10 parts of fatty acids and 0.05-0.1 parts of protease.

[0006] Furthermore, the conditions of the steam explosion device are that the temperature is greater than 100°C, the pressure is between 1.5-2.5MPa, and the high temperature and high pressure conditions are maintained for 5 minutes.

[0007] Further, determining the preparation state of the fish protein amino acid foliar fertilizer comprises:

[0008] Comparing the fluctuation amplitude of the pressure in the steam explosion device with a preset first fluctuation amplitude;

[0009] If the fluctuation amplitude of the pressure in the steam explosion device is greater than the preset first fluctuation amplitude, it is determined that the preparation state of the fish protein amino acid foliar fertilizer is an unstable state.

[0010] Further, determining the removal effect of impurities in the fish protein amino acid foliar fertilizer comprises:

[0011] Comparing the fluctuation amplitude of the pressure in the steam explosion device with the preset first fluctuation amplitude and the preset second fluctuation amplitude respectively;

[0012] If the fluctuation amplitude of the pressure in the steam explosion device is greater than the preset first fluctuation amplitude and less than or equal to the preset second fluctuation amplitude, it is preliminarily determined that the removal effect of impurities in the fish protein amino acid foliar fertilizer does not meet the requirements, and whether the removal effect of impurities in the fish protein amino acid foliar fertilizer meets the requirements is determined based on the impurity content in the fish protein amino acid foliar fertilizer.

[0013] Further, the steam explosion duration of the fish and shrimp mixture is adjusted, including:

[0014] Comparing the fluctuation amplitude of the pressure in the steam explosion device with the preset second fluctuation amplitude;

[0015] If the fluctuation amplitude of the pressure in the steam explosion device is greater than the preset second fluctuation amplitude, the steam explosion time of the fish and shrimp mixture is increased.

[0016] Furthermore, the increase in the steam explosion duration of the fish and shrimp mixture is determined by the difference between the pressure fluctuation amplitude in the steam explosion device and a preset second fluctuation amplitude.

[0017] Further, determining the drum speed of the centrifuge includes:

[0018] Comparing the impurity content in the fish protein amino acid foliar fertilizer with the preset first content and the preset second content respectively;

[0019] If the impurity content in the fish protein amino acid foliar fertilizer is greater than the preset first content, it is determined that the removal effect of the impurities in the fish protein amino acid foliar fertilizer does not meet the requirements;

[0020] If the impurity content in the fish protein amino acid foliar fertilizer is greater than the preset first content and less than or equal to the preset second content, increasing the drum speed of the centrifuge;

[0021] If the impurity content in the fish protein amino acid foliar fertilizer is greater than the preset second content, it is preliminarily determined that the degree of purification of the mixed liquid does not meet the requirements, and whether the degree of purification of the mixed liquid meets the requirements is determined based on the concentration of amino acids in the fish protein amino acid foliar fertilizer.

[0022] Furthermore, the increase range of the drum speed of the centrifuge is determined by the difference between the impurity content in the fish protein amino acid foliar fertilizer and a preset first content.

[0023] Further, determining the temperature difference between the top and the bottom of the precipitation tank comprises:

[0024] Compare the concentration of amino acids in the fish protein amino acid foliar fertilizer with the preset concentration;

[0025] If the concentration of the amino acids in the fish protein amino acid foliar fertilizer is less than the preset concentration, it is determined that the degree of purification of the mixed solution does not meet the requirements, and the temperature difference between the top and the bottom of the precipitation tank is increased.

[0026] Furthermore, the increase in the temperature difference between the top and the bottom of the precipitation tank is determined by the difference between the preset concentration and the concentration of the amino acids in the fish protein amino acid foliar fertilizer.

[0027] Compared with the prior art, the beneficial effect of the present invention lies in that the steam explosion technology of the foliar fertilizer of the present invention adjusts the steam explosion time of the fish and shrimp mixture according to the fluctuation amplitude of the pressure in the steam explosion device. Due to the aging of the seals in the steam explosion device, the sealing performance is reduced, and air leakage occurs during operation, which leads to a decrease in the stability of the preparation. By increasing the steam explosion time of the fish and shrimp mixture, the fish and shrimp mixture can have more time to complete the structural destruction and the release process of nutrients under a relatively low pressure and temperature environment, so as to ensure that the fish protein can be decomposed to an appropriate degree, so that the amino acid content in the finally prepared foliar fertilizer meets the requirements, and the drum speed of the centrifuge is determined according to the impurity content in the fish protein amino acid foliar fertilizer. Since the feed speed of the filtered solution into the centrifuge is too fast, the material in the centrifuge is evenly distributed, generating turbulence. , destroying the centrifugal stratification, causing some impurities to mix into the solution. By increasing the drum speed of the centrifuge, the viscous resistance of the liquid and the Brownian motion of the particles can be overcome, prompting them to settle to the wall or bottom of the centrifuge faster, thereby improving the centrifugal stratification effect. The temperature difference between the top and bottom of the precipitation tank is determined according to the concentration of amino acids in the fish protein amino acid foliar fertilizer. Since the fish protein solution itself may have a certain buffering capacity, it is affected when the pH value is adjusted, resulting in inaccurate pH adjustment, and then resulting in incomplete precipitation when the protein precipitates, resulting in insufficient purity of the final finished solution. By increasing the temperature difference between the top and bottom of the precipitation tank, the strong convection caused can make the protein molecules more evenly distributed in the solution, reduce the influence of local abnormal pH areas caused by the buffer system, and improve the preparation stability of the fish protein amino acid foliar fertilizer.

[0028] Furthermore, the steam explosion technology of the foliar fertilizer described in the present invention adjusts the steam explosion time of the fish and shrimp mixture by setting a preset first fluctuation amplitude and a preset second fluctuation amplitude. Due to the aging of the seals in the steam explosion device, the sealing performance is reduced, and air leakage occurs during operation, which leads to a decrease in the stability of the preparation. By increasing the steam explosion time of the fish and shrimp mixture, the fish and shrimp mixture can have more time to complete the structural destruction and nutrient release process under a relatively low pressure and temperature environment, so as to ensure that the fish protein can be decomposed to an appropriate degree, so that the amino acid content in the finally prepared foliar fertilizer meets the requirements, and the preparation stability of the fish protein amino acid foliar fertilizer is further improved.

[0029] Furthermore, the steam explosion technology of the foliar fertilizer of the present invention determines the drum speed of the centrifuge by setting a preset first content and a preset second content. Since the feeding speed of the filtered solution into the centrifuge is too fast, the material in the centrifuge is evenly distributed, turbulence is generated, and centrifugal stratification is destroyed, thereby causing some impurities to be mixed into the solution. By increasing the drum speed of the centrifuge, the viscous resistance of the liquid and the Brownian motion of the particles can be overcome, causing them to settle to the wall or bottom of the centrifuge faster, thereby improving the centrifugal stratification effect, and further improving the preparation stability of the fish protein amino acid foliar fertilizer.

[0030] Furthermore, the steam explosion technology of the foliar fertilizer of the present invention determines the temperature difference between the top and the bottom of the precipitation tank by setting a preset concentration. Since the fish protein solution itself may have a certain buffering capacity, it is affected when the pH value is adjusted, resulting in inaccurate pH adjustment, which in turn leads to incomplete precipitation during protein precipitation, resulting in insufficient purity of the final finished product solution. By increasing the temperature difference between the top and the bottom of the precipitation tank, the strong convection caused can make the protein molecules more evenly distributed in the solution, reduce the influence of the abnormal pH value area caused by the buffer system, and further improve the preparation stability of the fish protein amino acid foliar fertilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an overall flow chart of the steam explosion steps in the fish protein amino acid foliar fertilizer using the steam explosion technology according to an embodiment of the present invention;

[0032] Figure 2 A logic flow chart of the steam explosion steps in the fish protein amino acid foliar fertilizer using the steam explosion technology according to an embodiment of the present invention;

[0033] Figure 3 A specific flow chart of adjusting the steam explosion time of a fish and shrimp mixture in a steam explosion step in a fish protein amino acid foliar fertilizer using steam explosion technology according to an embodiment of the present invention;

[0034] Figure 4 The present invention is a specific flow chart of determining the drum speed of a centrifuge in the steam explosion step of a fish protein amino acid foliar fertilizer using steam explosion technology according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0037] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0038] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively an overall flow chart of the steam explosion step in the fish protein amino acid foliar fertilizer using steam explosion technology in an embodiment of the present invention, a logic flow chart, a specific flow chart for adjusting the steam explosion time of the fish and shrimp mixture, and a specific flow chart of the drum speed of the centrifuge. The fish protein amino acid foliar fertilizer using steam explosion technology of the present invention, the preparation process of which includes:

[0040] Step S1, using a steam explosion device to sequentially remove impurities, steam explode, cool and depressurize the pretreated fish and shrimp mixture to output the steam-exploded material, and filtering the steam-exploded material and then centrifuging it using a centrifuge to output a centrifuged solution;

[0041] Step S2, using a precipitation kettle to perform protein precipitation on the centrifuged solution to output a supernatant and a precipitated protein liquid, and sequentially performing protein dissolution, amino acid extraction, addition of nutrients and auxiliary components, and concentration operations on the precipitated protein liquid to output a fish protein amino acid foliar fertilizer;

[0042] Step S3, using a pressure sensor to detect the air pressure in the steam explosion device;

[0043] Step S4, determining the preparation state of the fish protein amino acid foliar fertilizer based on the fluctuation amplitude of the pressure in the steam explosion device;

[0044] Step S5, if the preparation state is an unstable state, adjusting the steam explosion time of the fish and shrimp mixture, or determining the removal effect of impurities in the fish protein amino acid foliar fertilizer based on the impurity content in the fish protein amino acid foliar fertilizer;

[0045] Step S6, if the removal effect of impurities in the fish protein amino acid foliar fertilizer does not meet the requirements, the drum speed of the centrifuge is determined or the temperature difference between the top and the bottom of the precipitation tank is determined based on the concentration of amino acids in the fish protein amino acid foliar fertilizer;

[0046] Among them, the ingredients and proportions of the fish protein amino acid foliar fertilizer are 25-40 parts of amino acids, 10-20 parts of small peptides, 3-5 parts of calcium, 0.2-0.5 parts of iron, 0.05-0.2 parts of manganese, 0.02 parts-0.1 parts of zinc, 0.01-0.05 parts of copper, 0.05-0.3 parts of boron, 4-10 parts of fatty acids and 0.05-0.1 parts of protease.

[0047] Specifically, after the step of adding nutrients and auxiliary ingredients, a pH adjustment operation is also included.

[0048] Specifically, steam explosion materials include denatured proteins, broken cell fragments, and fatty acids.

[0049] Specifically, the centrifuged solution includes amino acids, proteins, and free fatty acids.

[0050] Specifically, the supernatant includes amino acids, small peptides, and calcium ions.

[0051] Specifically, the precipitated protein liquid includes protein, fish and shrimp tissue fragments, and mineral particles.

[0052] Specifically, the nutrients include urea, potassium dihydrogen phosphate, and boron.

[0053] Specifically, auxiliary ingredients include glucose, vitamins, and sodium dodecylbenzene sulfonate.

[0054] Specifically, the protein is solubilized by dissolving the precipitated protein solution in a sodium hydroxide buffer.

[0055] Specifically, amino acid extraction is to extract amino acids in a solution using high performance liquid chromatography technology.

[0056] Specifically, the addition of nutrients and auxiliary components is to add urea, potassium dihydrogen phosphate, glucose and vitamins to the solution after amino acid extraction.

[0057] Specifically, impurities include incompletely hydrolyzed large molecular proteins, fats, and mineral residues from fish and shrimp.

[0058] Specifically, the impurities in the fish protein amino acid foliar fertilizer in this scheme are considered to be macromolecular proteins that are not completely hydrolyzed.

[0059] Specifically, the pretreatment of the fish and shrimp mixture includes cleaning the fish and shrimp raw materials and crushing the cleaned fish and shrimp.

[0060] Specifically, the cooling and depressurization is performed at room temperature and pressure.

[0061] Specifically, fish protein amino acid foliar fertilizer is in liquid form.

[0062] Specifically, the temperature difference between the top and the bottom of the precipitation tank is increased by heating the heating device at the top of the precipitation tank.

[0063] In practice, the steam explosion technology of the foliar fertilizer of the present invention adjusts the steam explosion time of the fish and shrimp mixture according to the fluctuation amplitude of the pressure in the steam explosion device. Due to the aging of the seals in the steam explosion device, the sealing performance is reduced, and air leakage occurs during operation, which leads to a decrease in the stability of the preparation. By increasing the steam explosion time of the fish and shrimp mixture, the fish and shrimp mixture can have more time to complete the structural destruction and the release of nutrients under a relatively low pressure and temperature environment, so as to ensure that the fish protein can be decomposed to an appropriate degree, so that the amino acid content in the finally prepared foliar fertilizer meets the requirements, and the drum speed of the centrifuge is determined according to the impurity content in the fish protein amino acid foliar fertilizer. Since the feed speed of the filtered solution into the centrifuge is too fast, the material in the centrifuge is evenly distributed, turbulence is generated, and the centrifugal stratification is destroyed. , which causes some impurities to mix into the solution. By increasing the drum speed of the centrifuge, the viscous resistance of the liquid and the Brownian motion of the particles can be overcome, causing them to settle to the wall or bottom of the centrifuge faster, thereby improving the centrifugal stratification effect. The temperature difference between the top and bottom of the precipitation tank is determined according to the concentration of amino acids in the fish protein amino acid foliar fertilizer. Since the fish protein solution itself may have a certain buffering capacity, it is affected when the pH value is adjusted, resulting in inaccurate pH adjustment, and then resulting in incomplete precipitation when the protein precipitates, resulting in insufficient purity of the final finished solution. By increasing the temperature difference between the top and bottom of the precipitation tank, the strong convection caused can make the protein molecules more evenly distributed in the solution, reduce the influence of the abnormal pH value area caused by the buffer system, and improve the preparation stability of the fish protein amino acid foliar fertilizer.

[0064] Specifically, the conditions of the steam explosion device are a temperature greater than 100° C., a pressure between 1.5-2.5 MPa, and the high temperature and high pressure conditions are maintained for 5 minutes.

[0065] Specifically, determining the preparation state of the fish protein amino acid foliar fertilizer includes:

[0066] Comparing the fluctuation amplitude of the pressure in the steam explosion device with a preset first fluctuation amplitude;

[0067] If the fluctuation amplitude of the pressure in the steam explosion device is greater than the preset first fluctuation amplitude, it is determined that the preparation state of the fish protein amino acid foliar fertilizer is an unstable state.

[0068] Specifically, determining the removal effect of impurities in the fish protein amino acid foliar fertilizer includes:

[0069] Comparing the fluctuation amplitude of the pressure in the steam explosion device with the preset first fluctuation amplitude and the preset second fluctuation amplitude respectively;

[0070] If the fluctuation amplitude of the pressure in the steam explosion device is greater than the preset first fluctuation amplitude and less than or equal to the preset second fluctuation amplitude, it is preliminarily determined that the removal effect of impurities in the fish protein amino acid foliar fertilizer does not meet the requirements, and whether the removal effect of impurities in the fish protein amino acid foliar fertilizer meets the requirements is determined based on the impurity content in the fish protein amino acid foliar fertilizer.

[0071] It can be understood that the three intervals corresponding to the preset first fluctuation range and the preset second fluctuation range correspond to three situations respectively:

[0072] The first interval is when the fluctuation amplitude of the pressure in the steam explosion device is less than or equal to the preset first fluctuation amplitude, corresponding to the situation where the preparation state of the fish protein amino acid foliar fertilizer is a stable state;

[0073] The second interval is when the fluctuation amplitude of the pressure in the steam explosion device is greater than the preset first fluctuation amplitude and less than or equal to the preset second fluctuation amplitude, corresponding to the situation where the feeding speed of the filtered solution into the centrifuge is too fast, resulting in uniform distribution of the material in the centrifuge, generating turbulence, destroying the centrifugal stratification, and causing some impurities to mix into the solution;

[0074] The third interval is when the fluctuation amplitude of the pressure in the steam explosion device is greater than the preset second fluctuation amplitude, corresponding to aging of the seal in the steam explosion device, resulting in reduced sealing performance and air leakage during operation.

[0075] In practice, the preset first fluctuation amplitude is generally selected in the range of [1.1MPa, 1.3MPa], and the preset second fluctuation amplitude is generally selected in the range of [1.4MPa, 1.6MPa].

[0076] Preferably, the preferred embodiment of the preset first fluctuation amplitude is 1.2 MPa, and the preferred embodiment of the preset second fluctuation amplitude is 1.5 MPa.

[0077] Specifically, the fluctuation amplitude of the pressure in the steam explosion device is the difference between the maximum air pressure in the steam explosion device within a number of operation cycles and the minimum air pressure in the steam explosion device within a number of operation cycles.

[0078] In implementation, the steam explosion technology of foliar fertilizer of the present invention determines the preparation state of fish protein amino acid foliar fertilizer by setting a preset first fluctuation amplitude and a preset second fluctuation amplitude, thereby reducing the influence of reduced preparation accuracy of fish protein amino acid foliar fertilizer due to inaccurate determination of the preparation state of fish protein amino acid foliar fertilizer, and further improving the preparation stability of fish protein amino acid foliar fertilizer.

[0079] Specifically, the steam explosion time of the fish and shrimp mixture is adjusted, including:

[0080] Comparing the fluctuation amplitude of the pressure in the steam explosion device with the preset second fluctuation amplitude;

[0081] If the fluctuation amplitude of the pressure in the steam explosion device is greater than the preset second fluctuation amplitude, the steam explosion time of the fish and shrimp mixture is increased.

[0082] Specifically, the increase in the steam explosion duration of the fish and shrimp mixture is determined by the difference between the pressure fluctuation amplitude in the steam explosion device and a preset second fluctuation amplitude.

[0083] Specifically, when the difference between the pressure fluctuation amplitude in the steam explosion device and the preset second fluctuation amplitude is within 0.3MPa, the steam explosion time of the fish and shrimp mixture increases to 1.1 times the original; when the difference between the pressure fluctuation amplitude in the steam explosion device and the preset second fluctuation amplitude exceeds 0.3MPa, the steam explosion time of the fish and shrimp mixture increases by 0.5min for every 0.1MPa exceeding it. For example, the difference between the pressure fluctuation amplitude in the steam explosion device and the preset second fluctuation amplitude is 0.5MPa, the current steam explosion time of the fish and shrimp mixture is 7min, and the reduced steam explosion time of the fish and shrimp mixture is 7×1.1+0.5×2=8.7min.

[0084] In implementation, the steam explosion technology of the foliar fertilizer of the present invention adjusts the steam explosion time of the fish and shrimp mixture by setting a preset first fluctuation amplitude and a preset second fluctuation amplitude. Due to the aging of the seals in the steam explosion device, the sealing performance is reduced, and air leakage occurs during operation, which leads to a decrease in the stability of the preparation. By increasing the steam explosion time of the fish and shrimp mixture, the fish and shrimp mixture can have more time to complete the structural destruction and nutrient release process under a relatively low pressure and temperature environment, so as to ensure that the fish protein can be decomposed to an appropriate degree, so that the amino acid content in the finally prepared foliar fertilizer meets the requirements, and the preparation stability of the fish protein amino acid foliar fertilizer is further improved.

[0085] Specifically, determining the drum speed of the centrifuge includes:

[0086] Obtain the impurity content in fish protein amino acid foliar fertilizer;

[0087] Comparing the impurity content in the fish protein amino acid foliar fertilizer with the preset first content and the preset second content respectively;

[0088] If the impurity content in the fish protein amino acid foliar fertilizer is greater than the preset first content, it is determined that the removal effect of the impurities in the fish protein amino acid foliar fertilizer does not meet the requirements;

[0089] If the impurity content in the fish protein amino acid foliar fertilizer is greater than the preset first content and less than or equal to the preset second content, increasing the drum speed of the centrifuge;

[0090] If the impurity content in the fish protein amino acid foliar fertilizer is greater than the preset second content, it is preliminarily determined that the degree of purification of the mixed liquid does not meet the requirements, and whether the degree of purification of the mixed liquid meets the requirements is determined based on the concentration of amino acids in the fish protein amino acid foliar fertilizer.

[0091] It can be understood that the three intervals corresponding to the preset first content and the preset second content correspond to three situations respectively:

[0092] The first interval is when the impurity content in the fish protein amino acid foliar fertilizer is less than or equal to the preset first content, corresponding to the situation where the removal effect of impurities in the fish protein amino acid foliar fertilizer meets the requirements;

[0093] The second interval is when the impurity content in the fish protein amino acid foliar fertilizer is greater than the preset first content and less than or equal to the preset second content, and the corresponding filtered solution is fed into the centrifuge at a too fast feeding speed, resulting in uniform distribution of materials in the centrifuge, turbulence, and destruction of centrifugal stratification, thereby causing some impurities to be mixed into the solution;

[0094] The third interval is that the impurity content in the fish protein amino acid foliar fertilizer is greater than the preset second content. The corresponding fish protein solution itself may have a certain buffering capacity, which causes the pH value to be affected during adjustment, resulting in insufficient purity of the final finished solution.

[0095] In practice, the preset first content is generally selected in the range of [2%, 4%], and the preset second content is generally selected in the range of [4%, 6%].

[0096] Preferably, the preferred embodiment of the preset first content is 3%, and the preferred embodiment of the preset second content is 5%.

[0097] In implementation, the steam explosion technology of the foliar fertilizer of the present invention determines the removal effect of impurities in the fish protein amino acid foliar fertilizer by setting a preset first content and a preset second content, thereby reducing the influence of the reduced preparation stability of the fish protein amino acid foliar fertilizer due to inaccurate determination of the removal effect of impurities in the fish protein amino acid foliar fertilizer, and further improving the preparation stability of the fish protein amino acid foliar fertilizer.

[0098] Specifically, the increase range of the drum speed of the centrifuge is determined by the difference between the impurity content in the fish protein amino acid foliar fertilizer and the preset first content.

[0099] Specifically, when the difference between the impurity content in the fish protein amino acid foliar fertilizer and the preset first content is within 2%, the drum speed of the centrifuge increases to 1.1 times the original speed; when the difference between the impurity content in the fish protein amino acid foliar fertilizer and the preset first content exceeds 2%, the drum speed of the centrifuge increases by 500r / min for every 1% exceeding it. For example, the difference between the impurity content in the fish protein amino acid foliar fertilizer and the preset first content is 4%. The current drum speed of the centrifuge is 1500r / min, and the increased drum speed of the centrifuge is 1500×1.1+500×2=2650r / min.

[0100] In implementation, the steam explosion technology of the foliar fertilizer of the present invention determines the drum speed of the centrifuge by setting a preset first content and a preset second content. Since the feeding speed of the filtered solution into the centrifuge is too fast, the material in the centrifuge is evenly distributed, turbulence is generated, and centrifugal stratification is destroyed, thereby causing some impurities to be mixed into the solution. By increasing the drum speed of the centrifuge, the viscous resistance of the liquid and the Brownian motion of the particles can be overcome, causing them to settle to the wall or bottom of the centrifuge faster, thereby improving the centrifugal stratification effect and further improving the preparation stability of the fish protein amino acid foliar fertilizer.

[0101] Specifically, determining the temperature difference between the top and the bottom of the precipitation tank includes:

[0102] Get the concentration of amino acids in fish protein amino acid foliar fertilizer;

[0103] Comparing the concentration of amino acids in the fish protein amino acid foliar fertilizer with a preset concentration;

[0104] If the concentration of the amino acids in the fish protein amino acid foliar fertilizer is less than the preset concentration, it is determined that the degree of purification of the mixed solution does not meet the requirements, and the temperature difference between the top and the bottom of the precipitation tank is increased.

[0105] It can be understood that the two intervals corresponding to the preset concentration correspond to two situations:

[0106] The first interval is that the concentration of amino acids in the fish protein amino acid foliar fertilizer is less than the preset concentration, and the corresponding fish protein solution itself may have a certain buffering capacity, which may affect the pH value during adjustment, thereby resulting in insufficient purity of the final finished product solution;

[0107] The second interval is the situation where the concentration of amino acids in the fish protein amino acid foliar fertilizer is greater than or equal to the preset concentration, and the degree of purification of the corresponding mixed solution meets the requirements.

[0108] In practice, the preset concentration is generally selected in the range of [24%, 26%].

[0109] Preferably, the preferred embodiment of the preset concentration is 25%.

[0110] In implementation, the steam explosion technology of the foliar fertilizer of the present invention determines the degree of purification of the mixed solution by setting a preset concentration, thereby reducing the impact of the inaccurate determination of the degree of purification of the mixed solution leading to a decrease in the preparation stability of the fish protein amino acid foliar fertilizer, and further improving the preparation stability of the fish protein amino acid foliar fertilizer.

[0111] Specifically, the increase in the temperature difference between the top and the bottom of the precipitation tank is determined by the difference between the preset concentration and the concentration of the amino acids in the fish protein amino acid foliar fertilizer.

[0112] Specifically, when the difference between the preset concentration and the concentration of amino acids in fish protein amino acid foliar fertilizer is within 3%, the temperature difference between the top and bottom of the precipitation tank increases to 1.2 times the original; when the difference between the preset concentration and the concentration of amino acids in fish protein amino acid foliar fertilizer exceeds 3%, the temperature difference between the top and bottom of the precipitation tank increases by 5°C for every 1% exceeding it. For example, if the difference between the preset concentration and the concentration of amino acids in fish protein amino acid foliar fertilizer is 5%, the current temperature difference between the top and bottom of the precipitation tank is 5°C, and the increased temperature difference between the top and bottom of the precipitation tank is 5×1.2+5×2=16°C.

[0113] In practice, the steam explosion technology of the foliar fertilizer of the present invention determines the temperature difference between the top and the bottom of the precipitation tank by setting a preset concentration. Since the fish protein solution itself may have a certain buffering capacity, it is affected when the pH value is adjusted, resulting in inaccurate pH adjustment, which in turn leads to incomplete precipitation during protein precipitation, resulting in insufficient purity of the final finished product solution. By increasing the temperature difference between the top and the bottom of the precipitation tank, the strong convection caused can make the protein molecules more evenly distributed in the solution, reduce the influence of the abnormal pH value area caused by the buffer system, and further improve the preparation stability of the fish protein amino acid foliar fertilizer.

[0114] Example

[0115] (1) The following table shows the content of components in the mother liquor and the extract:

[0116]

[0117]

[0118] Among them, liquid No. 1, liquid No. 2 and liquid No. 3 are all fish protein samples extracted using mother liquor, and the mother liquor is the fish protein amino acid foliar fertilizer prepared by the present invention.

[0119] (2) The following table shows the content of amino acids in the mother liquor and the extract:

[0120]

[0121]

[0122]

[0123] (3) The following table shows the nitrogen content in the mother liquor and the extract:

[0124]

[0125]

[0126] The determination index is total nitrogen; the reference method is the agricultural industry standard, NY / T 1121.24-2012 Soil Testing Part 24: Determination of Total Nitrogen in Soil - Automatic Nitrogen Determination Method [S]. 2012; the main instruments are ML204 1 / 10,000 balance (Mettler) and automatic nitrogen determination instrument (Buchi, Switzerland).

[0127] The measurement steps are as follows: weigh an appropriate amount of soil sample and put it into the bottom of a dry Kjeldahl flask, add 2g of accelerator and 5ml of concentrated sulfuric acid, and shake well. Place the Kjeldahl flask on a digestion furnace and heat it with a low fire. When the reaction in the flask is moderate (about 10-15 minutes), increase the firepower to keep the digested soil liquid slightly boiling. After the digestion liquid and soil particles have all turned grayish white with a slight green color, continue to digest for 1 hour. After the digestion is completed, cool it and wait for distillation. While digesting the soil sample, make three blank determinations. Except for not adding soil samples, other operations are the same as when measuring soil samples. Before distillation, prepare sodium hydroxide, sulfuric acid standard solution, and mixed indicator, fully preheat the nitrogen analyzer, and perform air distillation to clean the pipeline until the reading is stable. Take an appropriate amount of the above-mentioned test liquid and inject it into the distillation tube of the Kjeldahl nitrogen analyzer. After setting the parameters, measure the test liquid.

[0128] (4) The following table shows the phosphorus content in the mother liquor and the extract:

[0129]

[0130]

[0131] Among them, the determination index is total phosphorus; the reference method is the agricultural industry standard, NY / TT 2017-2011 Determination of Nitrogen, Phosphorus and Potassium in Plants [S]. 2011; the main instruments are ML204 1 / 10,000 balance (Mettler) and UV spectrophotometer (T1910 General Purpose).

[0132] The measurement steps are as follows: weigh 0.2g of the sample, accurate to 0.0001g, and place it in a 100mL digestion tube (do not stick the sample to the bottleneck). Add 5mL of concentrated sulfuric acid, shake gently and leave for several hours. Add an appropriate amount of hydrogen peroxide, put a small bent-neck funnel at the mouth of the tube, and digest at 380℃ on the digestion furnace. Remove it and cool it slightly after one hour, add 1mL of hydrogen peroxide, repeat 2-3 times, and digest until the solution is colorless or clear, and then heat it for about 5-10min to remove the remaining hydrogen peroxide. Remove the digestion tube and cool it. Rinse the bent-neck funnel with a small amount of water, and the washing liquid flows into the digestion tube. Wash the digestion liquid into a 50mL volumetric flask without damage, mix it and test it. Make three blanks in addition. Pipette 1-10mL of the sample solution to be tested into a 25mL volumetric flask and dilute it with water to about 3 / 5 of the total volume. Add 2-3 drops of dinitrophenol indicator and adjust the solution with acid-base solution until it is just slightly yellow. Accurately add 2.5 mL of molybdenum antimony anti-color developer, add water to make up to volume, shake well, develop color for 30 minutes, and compare colors at a wavelength of 880 nm.

[0133] (5) The following table shows the potassium content in the mother liquor and the extract:

[0134]

[0135]

[0136] Among them, the determination index is total potassium; the reference method is the agricultural industry standard, NY / TT 2017-2011 Determination of Nitrogen, Phosphorus and Potassium in Plants [S]. 2011; the main instruments are ML204 1 / 10,000 balance (Mettler) and UV spectrophotometer (T1910 General Purpose).

[0137] The measurement steps are as follows: weigh 0.2g of the sample, accurate to 0.0001g, and place it in a 100mL digestion tube (do not stick the sample to the bottleneck). Add 5mL of concentrated sulfuric acid, shake gently and leave for several hours. Add an appropriate amount of hydrogen peroxide, put a small bent-neck funnel at the mouth of the tube, and digest at 380℃ on the digestion furnace. Remove it and cool it slightly after one hour, add 1mL of hydrogen peroxide, repeat 2-3 times, and digest until the solution is colorless or clear, and then heat it for about 5-10min to remove the remaining hydrogen peroxide. Remove the digestion tube and cool it. Rinse the bent-neck funnel with a small amount of water, and the washing liquid flows into the digestion tube. Wash the digestion liquid into a 50mL volumetric flask without damage, mix it and test it. Make three blanks in addition. Pipette 1-10mL of the sample solution to be tested into a 25mL volumetric flask and dilute it with water to about 3 / 5 of the total volume. Add 2-3 drops of dinitrophenol indicator and adjust the solution with acid-base solution until it is just slightly yellow. Accurately add 2.5 mL of molybdenum antimony anti-color developer, add water to make up to volume, shake well, develop color for 30 minutes, and compare colors at a wavelength of 880 nm.

[0138] (6) The following table shows the free amino acid content in the mother liquor and the extract:

[0139]

[0140] The determination index is free amino acid; the reference method is Wang Wenping. Improvement of the determination method of total free amino acid in plant samples [J]. Journal of Beijing Agricultural College, 1998, 13(3):5; the main instruments are ML204 type 1 / 10,000 balance (Mettler) and spectrophotometer.

[0141] The measurement steps are as follows: Take 0.5g of fresh sample, add 5ml of 10% acetic acid and grind, centrifuge and take 0.5ml of supernatant, use pH5.4 acetate buffer, and dilute to 25ml. First take 10ml of the prepared sample extract, add it to a 20ml test tube, and boil it in a water-soluble pot for 15min, the purpose is to precipitate the protein and oxidized ascorbic acid in the sample, then cool it for use, and operate the same as the standard curve during measurement. Take 0, 0.2, 0.4, 0.6, 0.8, 1.0ml of standard leucine solution, make up to 2ml with buffer, add 3ml of hydrated ninhydrin solution, 0.1ml of 0.3% ascorbic acid solution, mix well, boil in boiling water for 15min, cool in cold water, shake well, dilute to 20ml, measure the absorbance value at 580nm, draw a standard curve, and the nitrogen content of the sample can be read from the standard curve.

[0142] (7) The following table shows the pH values ​​of the mother liquor and the extract:

[0143]

[0144] The determination index is pH value; the reference method is the agricultural industry standard. NY / T 1121.2-2006 Soil Testing Part 2: Determination of Soil pH [S]. 2006.; the main instruments are ML204 type 1 / 10,000 balance (Mettler) and pH meter.

[0145] The measurement steps are as follows: accurately weigh 10 g of air-dried sample, add 25 ml of distilled water according to a water-to-soil ratio of 2.5:1, stir with a mixer for 5 minutes, let it stand for 30 minutes to clarify, and measure with a pH meter.

[0146] (8) The following table shows the water-insoluble content in the mother liquor and the extract:

[0147]

[0148] Among them, the determination index is water-insoluble matter; the main instrument is ML204 1 / 10,000 balance (Mettler).

[0149] The measurement steps are as follows: at room temperature (25±5℃), weigh 1g sample, place in a beaker, add 250ml water, stir thoroughly for 3min, let stand for 15min, and filter with a glass dry pot filter that has been dried to constant weight in a 105℃ drying oven. When transferring by suction, first pour the upper solution in the beaker, shake well when a small amount of solution (about 20ml) remains, and then pour it into the filter. Finally, rinse the beaker with a small amount of water (no more than 50ml) to transfer all the residues into the filter, dry it, dry it for 1 hour, take it out to room temperature and weigh it. In the blank experiment, other steps are measured simultaneously except that no sample is added.

[0150] (9) The following table shows the organic matter content in the mother liquor and the extract:

[0151]

[0152]

[0153] Among them, the measurement indicators are organic matter / organic carbon; the reference method is the local standard, DB12 / T 961-2020 Determination of organic matter content in soil by direct heating method [S]. 2020.; the main instruments are ML204 type one-tenth balance (Mettler) and digital titrator.

[0154] The measurement steps are as follows: accurately weigh 0.05 g to 0.5 g (accurate to 0.0001 g, the sample weight depends on the range of soil organic matter content) of air-dried soil sample that has passed through a 0.25 mm pore size sieve, put it into a glass digestion tube, add 5 mL of 0.8 mol / L potassium dichromate solution and 5 mL of sulfuric acid, cover the tube stopper, and put the digestion tube into a porous furnace. Control the temperature of the electric furnace to maintain the temperature in the tube at 170°C to 180°C. When the solution in the digestion tube begins to boil, start timing, maintain a slightly boiling state, take out the digestion tube after 5 min±0.5 min, cool for 30 min, transfer the digestion solution and soil residue to a 50 mL triangular flask without damage with water, rinse the test tube and tube stopper with water, and combine the washing solution into the triangular flask. Add 3 drops of o-phenanthroline indicator and titrate with ferrous sulfate standard solution. The solution changes from orange-yellow to blue-green and finally to brown-red, and the end point is reached.

[0155] (10) The following table shows the element contents in the mother liquor and the extract:

[0156]

[0157]

[0158]

[0159]

[0160]

[0161] Among them, the determination index is the element; the reference method is the water conservancy industry standard. SL 394.1-2007 Determination of 34 elements including lead, cadmium, vanadium, phosphorus, etc. - Inductively coupled plasma atomic emission spectrometry (ICP-AES) [S]. 2007.; the main instruments are ML204 type one-tenth balance (Mettler), Thermo Fisher iCAP 7400 dual-channel inductively coupled plasma emission spectrometer (ICP-AES), Thermo Fisher iCAP RQ inductively coupled plasma mass spectrometer (ICP-MS).

[0162] The measurement steps are as follows: weigh 0.1-0.5g of soil sample that has passed through a 100-mesh sample sieve into a polytetrafluoroethylene crucible, moisten it with a few drops of water, add 5mL of hydrochloric acid, heat it on a hot plate at low temperature, and add 10mL of nitric acid when it evaporates to about 2mL, continue heating and steaming until it is nearly viscous, add 5mL of hydrofluoric acid and continue heating. In order to achieve a good silicon removal effect, the crucible should be shaken frequently. Finally, add 2mL of perchloric acid and heat until the white smoke is basically gone. Rinse the inner wall and the crucible cover with 2% nitric acid solution, dissolve the residue with warm water, and after cooling, dilute it to a 50mL volumetric flask with 2% nitric acid solution. Make three reagent blanks. The solution is filtered with a 0.22um filter membrane, and the filtrate is measured with an inductively coupled plasma emission spectrometer and an inductively coupled plasma emission mass spectrometer.

[0163] (11) The following table shows the amino acid composition of the mother solution and the extract:

[0164]

[0165]

[0166]

[0167] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A fish protein amino acid foliar fertilizer using steam explosion technology, characterized in that: The preparation process includes: The pretreated fish and shrimp mixture is subjected to sequential impurity removal, steam explosion, cooling and pressure reduction treatment using a steam explosion device to output the steam explosion material, and the steam explosion material is filtered and centrifuged using a centrifuge to output a centrifugal solution; Using a precipitation kettle to perform protein precipitation on the centrifuged solution to output a supernatant and a precipitated protein solution, and sequentially performing protein dissolution, amino acid extraction, addition of nutrients and auxiliary components, and concentration operations on the precipitated protein solution to output a fish protein amino acid foliar fertilizer; Use a pressure sensor to detect the air pressure in the steam explosion device; Determine the preparation state of fish protein amino acid foliar fertilizer based on the fluctuation amplitude of pressure in the steam explosion device; If the preparation state is an unstable state, the steam explosion duration of the fish and shrimp mixture is adjusted, or the removal effect of impurities in the fish protein amino acid foliar fertilizer is determined based on the impurity content in the fish protein amino acid foliar fertilizer; If the removal effect of impurities in the fish protein amino acid foliar fertilizer does not meet the requirements, the drum speed of the centrifuge is determined or the temperature difference between the top and the bottom of the precipitation tank is determined based on the concentration of amino acids in the fish protein amino acid foliar fertilizer; Among them, the ingredients and proportions of the fish protein amino acid foliar fertilizer are 25-40 parts of amino acids, 10-20 parts of small peptides, 3-5 parts of calcium, 0.2-0.5 parts of iron, 0.05-0.2 parts of manganese, 0.02 parts-0.1 parts of zinc, 0.01-0.05 parts of copper, 0.05-0.3 parts of boron, 4-10 parts of fatty acids and 0.05-0.1 parts of protease.

2. The fish protein amino acid foliar fertilizer using steam explosion technology according to claim 1, characterized in that: The conditions of the steam explosion device are that the temperature is greater than 100°C, the pressure is between 1.5-2.5MPa, and the high temperature and high pressure conditions are maintained for 5 minutes.

3. The fish protein amino acid foliar fertilizer using steam explosion technology according to claim 2, characterized in that: Determining the preparation state of the fish protein amino acid foliar fertilizer comprises: Comparing the fluctuation amplitude of the pressure in the steam explosion device with a preset first fluctuation amplitude; If the fluctuation amplitude of the pressure in the steam explosion device is greater than the preset first fluctuation amplitude, it is determined that the preparation state of the fish protein amino acid foliar fertilizer is an unstable state.

4. The fish protein amino acid foliar fertilizer using steam explosion technology according to claim 3, characterized in that: Determining the removal effect of impurities in the fish protein amino acid foliar fertilizer includes: Comparing the fluctuation amplitude of the pressure in the steam explosion device with the preset first fluctuation amplitude and the preset second fluctuation amplitude respectively; If the fluctuation amplitude of the pressure in the steam explosion device is greater than the preset first fluctuation amplitude and less than or equal to the preset second fluctuation amplitude, it is preliminarily determined that the removal effect of impurities in the fish protein amino acid foliar fertilizer does not meet the requirements, and whether the removal effect of impurities in the fish protein amino acid foliar fertilizer meets the requirements is determined based on the impurity content in the fish protein amino acid foliar fertilizer.

5. The fish protein amino acid foliar fertilizer using steam explosion technology according to claim 4, characterized in that: The steam explosion time of the fish and shrimp mixture is adjusted, including: Comparing the fluctuation amplitude of the pressure in the steam explosion device with the preset second fluctuation amplitude; If the fluctuation amplitude of the pressure in the steam explosion device is greater than the preset second fluctuation amplitude, the steam explosion time of the fish and shrimp mixture is increased.

6. The fish protein amino acid foliar fertilizer using steam explosion technology according to claim 5, characterized in that: The increase in the steam explosion duration of the fish and shrimp mixture is determined by the difference between the pressure fluctuation amplitude in the steam explosion device and a preset second fluctuation amplitude.

7. The fish protein amino acid foliar fertilizer using steam explosion technology according to claim 4, characterized in that: Determining the drum speed of the centrifuge includes: Comparing the impurity content in the fish protein amino acid foliar fertilizer with the preset first content and the preset second content respectively; If the impurity content in the fish protein amino acid foliar fertilizer is greater than the preset first content, it is determined that the removal effect of the impurities in the fish protein amino acid foliar fertilizer does not meet the requirements; If the impurity content in the fish protein amino acid foliar fertilizer is greater than the preset first content and less than or equal to the preset second content, increasing the drum speed of the centrifuge; If the impurity content in the fish protein amino acid foliar fertilizer is greater than the preset second content, it is preliminarily determined that the degree of purification of the mixed liquid does not meet the requirements, and whether the degree of purification of the mixed liquid meets the requirements is determined based on the concentration of amino acids in the fish protein amino acid foliar fertilizer.

8. The fish protein amino acid foliar fertilizer using steam explosion technology according to claim 7, characterized in that: The increase range of the rotating speed of the centrifuge is determined by the difference between the impurity content in the fish protein amino acid foliar fertilizer and the preset first content.

9. The fish protein amino acid foliar fertilizer using steam explosion technology according to claim 8, characterized in that: Determining the temperature difference between the top and the bottom of the precipitation tank comprises: Compare the concentration of amino acids in the fish protein amino acid foliar fertilizer with the preset concentration; If the concentration of the amino acids in the fish protein amino acid foliar fertilizer is less than the preset concentration, it is determined that the degree of purification of the mixed solution does not meet the requirements, and the temperature difference between the top and the bottom of the precipitation tank is increased.

10. The fish protein amino acid foliar fertilizer using steam explosion technology according to claim 9, characterized in that: The increase in the temperature difference between the top and the bottom of the precipitation tank is determined by the difference between the preset concentration and the concentration of the amino acids in the fish protein amino acid foliar fertilizer.

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