CN112409069A

CN112409069A - Humic acid long-acting formula fertilizer and preparation method thereof

Info

Publication number: CN112409069A
Application number: CN202011322947.6A
Authority: CN
Inventors: 罗晓明
Original assignee: Anhui Scholar Trader Biotechnology Co ltd
Current assignee: Anhui Scholar Trader Biotechnology Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-02-26

Abstract

The invention discloses a humic acid long-acting formula fertilizer and a preparation method thereof, wherein the raw materials comprise, by weight, 30-50 parts of humic acid, 10-20 parts of corn straw, 3-5 parts of micronutrient elements, 0.08-0.10 part of composite strain, 30-50 parts of modified starch, 20-30 parts of polyvinyl alcohol, 10-30 parts of modified chitosan acetic acid solution, 10-16 parts of liquid paraffin and 3-5 parts of dibutyl phthalate. According to the humic acid long-acting formula fertilizer, humic acid is used as a raw material and is matched with a compound strain for fermentation, the microorganism decomposes humic acid with large molecular weight and low activity into high-activity and small-molecular-weight organic substances, and the porous slow-release particles have the advantages of easiness in degradation, no pollution, good water resistance and difficulty in scattering by combining with a modified chitosan acetic acid solution, so that the absorption efficiency of crops on the compound fertilizer is effectively improved, the loss and volatilization of the humic acid in the fertilizer are reduced, and the fertilizing times are also reduced.

Description

Humic acid long-acting formula fertilizer and preparation method thereof

Technical Field

The invention relates to the technical field of fertilizer preparation, in particular to a humic acid long-acting formula fertilizer and a preparation method thereof.

Background

Humic Acid (HA) is remains of animals and plants, mainly remains of plants, organic substances which are generated and accumulated through a series of processes of microbial decomposition and transformation and geochemistry, and the main component of the HA is a mixture of various high molecular organic weak acids. Its total amount is surprisingly large, measured in trillions of tons. The river, lake and sea, soil coal mine and most of the earth surface have its trace. Due to its wide existence, it has great influence on the earth, and relates to carbon circulation, mineral migration and accumulation, soil fertility, ecological balance and other aspects. The humic acid organic elements mainly comprise C, H, O, N, S and the like, and the humic acid components mainly comprise humic acid, humic acid and humic acid. Wherein, the Fulvic Acid (FA) has small molecular weight, high activity and good effect and is the essence of humic acid. Humic acid has strong biological activity, improves the physical and chemical properties of soil, improves the fertilizer efficiency and activates soil nutrients, thereby improving the growth environment of crops, and simultaneously, the humic acid also has various biological activities of promoting the growth of root systems of the crops, enhancing the absorption, accumulation and transportation of the crops to the nutrients, promoting respiration, improving the activity of biological enzymes, improving the stress resistance of the plants and the like.

Referring to Chinese patent publication No. CN106316670A, a preparation method of humic acid fertilizer is provided, which comprises mixing humus soil and hydrochloric acid, and filtering to obtain a filter cake M; mixing the filter cake M with alkali liquor, and centrifuging to obtain a centrifugate N; adjusting the pH value of the centrifugate N to 4.8-5.2 by using hydrochloric acid, and filtering to obtain humic acid; heating and mixing acrylic acid, water, a cross-linking agent and an initiator to obtain an acrylic acid polymer; mixing the humic acid and the acrylic acid polymer, stirring and curing, filtering to obtain gel, and granulating and drying the gel to obtain a humic acid fertilizer; according to the scheme, the humic acid fertilizer is prepared into gel, so that the fertilizer has a certain water absorption capacity, and humic acid in the fertilizer is not easy to run off along with rainwater; however, due to the existence of the gel, the utilization rate of the fertilizer is greatly reduced, the fertilizer is not easy to decompose, multiple times of fertilizer application is needed for crops, the environment is easily seriously polluted, and in order to solve the problems, the technical personnel in the field provide the humic acid long-acting formula fertilizer and the preparation method thereof.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a humic acid long-acting formula fertilizer and a preparation method thereof, humic acid is taken as a raw material and is matched with a compound strain for fermentation, the microorganism decomposes humic acid with large molecular weight and low activity into organic substances with high activity and small molecular weight, and then corresponding multiple trace elements are matched according to different requirements of crops, and the prepared porous slow-release particles wrap the fertilizer by combining the addition of a modified chitosan acetic acid solution, because the porous slow-release particles have slow-release performance, the porous slow-release particles can provide long-term effective large elements and trace elements for the growth of the plants, have the advantages of easy degradation, no pollution, good water resistance and firm combination and difficult scattering, effectively improve the absorption efficiency of the crops to the compound fertilizer, help to reduce the loss and volatilization of the humic acid in the fertilizer, and also reduce the fertilizing times, solves the problems that the utilization rate of the fertilizer is greatly reduced, the fertilizer is not easy to decompose due to the existence of gel in the patent publication No. CN106316670A, and the environment is easily seriously polluted because the fertilizer needs to be applied for a plurality of times.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the humic acid long-acting formula fertilizer comprises, by weight, 30-50 parts of humic acid, 10-20 parts of corn straw, 3-5 parts of trace nutrient elements, 0.08-0.10 part of composite strain, 30-50 parts of modified starch, 20-30 parts of polyvinyl alcohol, 10-30 parts of modified chitosan acetic acid solution, 10-16 parts of liquid paraffin and 3-5 parts of dibutyl phthalate;

the humic acid long-acting formula fertilizer is prepared by the following method:

mixing humic acid and corn straw, crushing the mixture by using a crusher, screening the crushed material by using a 60-mesh sieve, then putting the screened material into a fermentation tank for uniformly mixing, inoculating a composite strain, controlling the humidity inside the fermentation tank to be 55-70%, fermenting for 7-14 days at the temperature of 60-75 ℃, finally, carrying out ventilation drying on the fermented material after fermentation is finished, crushing by using the crusher, and screening the crushed fermented material by using the 60-mesh sieve again to obtain a fermented base material;

putting polyvinyl alcohol into a container, adding distilled water into the container, heating the container to completely dissolve the polyvinyl alcohol in the distilled water to obtain a polyvinyl alcohol solution, adding the distilled water into the modified starch to prepare a modified starch solution, wherein the using amount of the distilled water is 65% of the total amount of the modified corn starch, putting the modified starch solution into the container, heating and stirring at the temperature of 90 ℃ for 15 minutes, then adding the polyvinyl alcohol solution into the modified starch solution, continuing heating and stirring at the temperature of 90 ℃, stirring for 20 minutes, and cooling to obtain a prepolymer;

adding the fermentation base material into the modified chitosan acetic acid solution, heating and stirring in an oil bath kettle at 45 ℃, stirring for 30 minutes, cooling to obtain an intermediate, mixing liquid paraffin and dibutyl phthalate, mixing and stirring at the rotation speed of 800-1000r/min and the temperature of 40-50 ℃, and stirring for 15 minutes to obtain the additive;

step four, adding the intermediate into the additive, stirring and mixing at the rotation speed of 300-500r/min and the temperature of 30-40 ℃, stirring for 2 hours, and washing, filtering and drying to obtain porous slow-release particles;

step five, introducing the porous slow-release particles, the prepolymer, the fermentation base material and the micronutrients into mixing equipment together, putting the mixture into a mixing tank through a feeding pipe, regulating and controlling the output power of a spiral heating ring by using a controller, controlling the temperature inside the mixing tank to be 80-90 ℃, simultaneously opening an electric heating rod switch inside a stirring part II, starting a driving assembly when the temperature of the electric heating rod is 80 ℃, driving a driving shaft to rotate by using a speed reducer, driving a connecting shaft to rotate inside the mixing tank by using the driving shaft, enabling the stirring part I and the stirring part II to simultaneously rotate inside the mixing tank by using the connecting shaft, heating, stirring and mixing the mixed materials inside the mixing tank by using the stirring part I and the stirring part II, closing the spiral heating ring and the electric heating rod after uniform mixing, introducing cooling water into a water inlet pipe, and cooling the mixed materials inside the mixing tank by using a cooling coil pipe, and (4) sending the mixed material out through a discharge pipe to obtain the humic acid long-acting formula fertilizer.

Preferably, the micronutrient is a mixture of nitrogen, phosphorus and potassium in any proportion, and the composite strain is one or more of bacillus megaterium, potassium bacteria, saccharomycetes, nitrogen-fixing rhizobia, free-living nitrogen-fixing bacteria and combined nitrogen-fixing bacteria in any proportion.

Preferably, the modified starch is prepared by the following method:

step A1, taking corn starch, adding distilled water into the corn starch, stirring and mixing, wherein the amount of the distilled water is 65 percent of the total amount of the corn starch, and preparing a corn starch solution;

and A2, adding citric acid and glycerol into the corn starch solution, wherein the corn starch, the citric acid and the glycerol are stirred and mixed according to the mass ratio of 5:3:2, and standing for 18h to obtain the modified starch.

Preferably, the modified chitosan acetic acid solution is prepared by the following method:

step S1, taking glacial acetic acid, and adding distilled water into the glacial acetic acid for dilution to obtain a glacial acetic acid solution;

and step S2, adding chitosan with deacetylation degree of 85% and glycerol into the glacial acetic acid solution, and stirring at the rotation speed of 150r/min for 8h at room temperature to obtain the modified chitosan acetic acid solution.

Preferably, the mixing apparatus includes shell, blending tank, drive assembly and stirring subassembly, and the blending tank is located the inside of shell, the top of shell is provided with the top cap, and the top fixedly connected with inlet pipe of top cap, the bottom of inlet pipe runs through top cap and blending tank and extends to the inside of blending tank, and the inside of inlet pipe and the inside intercommunication of blending tank, the bottom intercommunication of blending tank has the discharging pipe, and the bottom of discharging pipe runs through the shell and extends to the bottom of shell, the surface of blending tank is provided with temperature control assembly, the front of shell is provided with the controller, drive assembly is located the top of top cap, stirring subassembly is located the inside of blending tank.

Preferably, the drive assembly includes mount, speed reducer and drive shaft, and the bottom of mount and the top fixed connection of top cap, the top of mount and the bottom fixed connection of speed reducer, and the output of speed reducer and the top fixed connection of drive shaft, the bottom of drive shaft runs through shell and blending tank and extends to the inside of blending tank.

Preferably, the stirring subassembly includes connecting axle, stirring portion one, stirring portion two, connecting portion, and the top of connecting axle and the one end that the drive shaft extends to the mixing tank inside pass through shaft coupling fixed connection, the fixed surface of the top of stirring portion one and connecting axle is connected, and the bottom fixed connection of the top of stirring portion two and connecting axle, the bottom of connecting portion and the bottom fixed connection of stirring portion one, and the top of connecting portion and the below fixed connection on two surfaces of stirring portion, the mounting groove has been seted up to the inside of stirring portion two, and the inside of mounting groove is provided with the electric heat stick.

Preferably, the temperature control assembly includes spiral heating circle, cooling coil, inlet tube and outlet pipe, and the inner wall of spiral heating circle is connected with the fixed surface of blending tank, the fixed surface of cooling coil's inner wall and blending tank is connected, the inlet tube communicates with the upper and lower both ends of cooling coil respectively with the one end of outlet pipe, and the one end of inlet tube and outlet pipe all runs through the shell and extends to the outside of shell.

A preparation method of a humic acid long-acting formula fertilizer specifically comprises the following steps:

(III) advantageous effects

The invention provides a humic acid long-acting formula fertilizer and a preparation method thereof. Compared with the prior art, the method has the following beneficial effects:

(1) the humic acid long-acting formula fertilizer and the preparation method thereof are characterized in that humic acid is used as a raw material, a compound strain is matched for fermentation, microorganisms decompose humic acid with large molecular weight and low activity into organic substances with high activity and small molecular weight, corresponding multiple trace elements are matched according to different requirements of crops, a modified chitosan acetic acid solution is added, a fermentation base material is added into the modified chitosan acetic acid solution, the mixture is heated and stirred in an oil bath kettle at the temperature of 45 ℃, the mixture is cooled after being stirred for 30 minutes to obtain an intermediate, then liquid paraffin and dibutyl phthalate are taken for mixing, the mixture is mixed and stirred under the conditions that the rotating speed is 800-plus-1000 r/min and the temperature is 40-50 ℃ for 15 minutes to obtain an additive, the intermediate is added into the additive at the rotating speed of 300-plus-500 r/min, stirring and mixing are carried out at the temperature of 30-40 ℃, stirring is carried out for 2h, porous slow-release particles are obtained through washing, suction filtration and drying, and the prepared porous slow-release particles wrap the fertilizer, so that the porous slow-release particles have slow-release performance, and after chitosan is completely degraded by microorganisms in soil, long-term effective major elements and trace elements can be provided for plant growth.

(2) The humic acid long-acting formula fertilizer and the preparation method thereof are characterized in that porous slow-release particles, prepolymer, fermentation base materials and micronutrients are introduced into mixing equipment together, the mixture is introduced into a mixing tank through a feeding pipe, the mixture is controlled by a controller to regulate the output power of a spiral heating ring, the temperature in the mixing tank is controlled to be 80-90 ℃, an electric heating rod switch in a stirring part II is turned on at the same time, the temperature of the electric heating rod is 80 ℃, a driving component is started, a speed reducer drives a driving shaft to rotate, a connecting shaft is driven to rotate in the mixing tank through the driving shaft, a stirring part I and a stirring part II are simultaneously rotated in the mixing tank by the connecting shaft, mixed materials in the mixing tank are heated, stirred and mixed uniformly, the spiral heating ring and the electric heating rod are turned off, and cooling water is introduced into a water inlet pipe, utilize cooling coil to cool down the inside misce bene of blending tank, see off the misce bene through the discharging pipe, utilize the stirring subassembly cooperation temperature control assembly in the mixing apparatus, realize carrying out high-efficient the mixing to the misce bene of blending tank inside, help the mixture of porous slowly-releasing granule and fertilizer, improve the preparation efficiency of fertilizer to can improve the quality of preparing out fertilizer.

Drawings

FIG. 1 is a schematic diagram of the mixing apparatus of the present invention;

FIG. 2 is a cross-sectional view of the mixing device configuration of the present invention;

FIG. 3 is a schematic view of the structure of the driving assembly and the stirring assembly of the present invention;

FIG. 4 is a sectional view of the second stirring section of the present invention.

In the figure, 1, a drive assembly; 11. a fixed mount; 12. a speed reducer; 13. a drive shaft; 2. a stirring assembly; 21. a connecting shaft; 22. a first stirring part; 23. a second stirring part; 24. a connecting portion; 25. mounting grooves; 26. an electric heating rod; 3. a temperature control assembly; 31. a spiral heating ring; 32. a cooling coil; 33. a water inlet pipe; 34. a water outlet pipe; 4. a housing; 5. a mixing tank; 6. a top cover; 7. a feed pipe; 8. a discharge pipe; 9. and a controller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-4, a humic acid long-acting formula fertilizer comprises, by weight, 30 parts of humic acid, 10 parts of corn straw, 3 parts of micronutrient elements, 0.08 part of composite strain, 30 parts of modified starch, 20 parts of polyvinyl alcohol, 10 parts of modified chitosan acetic acid solution, 10 parts of liquid paraffin and 3 parts of dibutyl phthalate;

mixing humic acid and corn straw, crushing the mixture by using a crusher, screening the crushed material by using a 60-mesh sieve, then putting the screened material into a fermentation tank, uniformly mixing, inoculating a composite strain, controlling the humidity inside the fermentation tank to be 55%, fermenting for 7 days at the temperature of 60 ℃, finally, carrying out ventilation drying on the fermented material after fermentation is finished, crushing by using the crusher, and screening the crushed fermented material by using the 60-mesh sieve again to obtain a fermented base material;

adding the fermentation base material into the modified chitosan acetic acid solution, heating and stirring in an oil bath kettle at 45 ℃, stirring for 30 minutes, cooling to obtain an intermediate, then taking liquid paraffin and dibutyl phthalate for mixing, mixing and stirring at the rotating speed of 800r/min and the temperature of 40 ℃ for 15 minutes to obtain an additive;

step four, adding the intermediate into the additive, stirring and mixing at the rotating speed of 300r/min and the temperature of 30 ℃, stirring for 2 hours, and washing, filtering and drying to obtain porous slow-release particles;

step five, introducing the porous slow-release particles, the prepolymer, the fermentation base material and the micronutrient into a mixing device, introducing the mixture into the mixing device through a feeding pipe 7, introducing the mixture into a mixing tank 5, regulating and controlling the output power of a spiral heating ring 31 by using a controller 9, controlling the internal temperature of the mixing tank 5 to be 80 ℃, simultaneously opening a switch of an electric heating rod 26 in a second stirring part 23, controlling the temperature of the electric heating rod 26 to be 80 ℃, starting a driving assembly 1, driving a driving shaft 13 to rotate by using a speed reducer 12, driving a connecting shaft 21 to rotate in the mixing tank 5 through the driving shaft 13, simultaneously rotating the first stirring part 22 and the second stirring part 23 in the mixing tank 5 by using the connecting shaft 21, heating, stirring and mixing the mixture in the mixing tank 5 by using the first stirring part 22 and the second stirring part 23, closing the spiral heating ring 31 and the electric heating rod 26 after uniform mixing, introducing cooling water into a water inlet pipe 33, the mixed material in the mixing tank 5 is cooled by the cooling coil 32, and the mixed material is sent out through the discharge pipe 8, so that the humic acid long-acting formula fertilizer is obtained.

Example 2

Referring to fig. 1-4, a humic acid long-acting formula fertilizer comprises, by weight, 50 parts of humic acid, 20 parts of corn straw, 5 parts of micronutrient elements, 0.10 part of composite strain, 50 parts of modified starch, 30 parts of polyvinyl alcohol, 30 parts of modified chitosan acetic acid solution, 16 parts of liquid paraffin and 5 parts of dibutyl phthalate;

mixing humic acid and corn straw, crushing the mixture by using a crusher, screening the crushed material by using a 60-mesh sieve, then putting the screened material into a fermentation tank, uniformly mixing, inoculating a composite strain, controlling the humidity in the fermentation tank to be 70%, fermenting for 14 days at the temperature of 75 ℃, finally, carrying out ventilation drying on the fermented material after fermentation is finished, crushing by using the crusher, and screening the crushed fermented material by using the 60-mesh sieve again to obtain a fermented base material;

adding the fermentation base material into the modified chitosan acetic acid solution, heating and stirring in an oil bath kettle at 45 ℃, stirring for 30 minutes, cooling to obtain an intermediate, then taking liquid paraffin and dibutyl phthalate for mixing, mixing and stirring at the rotation speed of 1000r/min and the temperature of 50 ℃ for 15 minutes to obtain an additive;

step four, adding the intermediate into the additive, stirring and mixing at the rotating speed of 500r/min and the temperature of 40 ℃, stirring for 2 hours, and washing, filtering and drying to obtain porous slow-release particles;

step five, introducing the porous slow-release particles, the prepolymer, the fermentation base material and the micronutrient into a mixing device, introducing the mixture into the mixing device through a feeding pipe 7, introducing the mixture into a mixing tank 5, regulating and controlling the output power of a spiral heating ring 31 by using a controller 9, controlling the internal temperature of the mixing tank 5 to be 90 ℃, simultaneously opening a switch of an electric heating rod 26 in a second stirring part 23, controlling the temperature of the electric heating rod 26 to be 80 ℃, starting a driving assembly 1, driving a driving shaft 13 to rotate by using a speed reducer 12, driving a connecting shaft 21 to rotate in the mixing tank 5 through the driving shaft 13, simultaneously rotating the first stirring part 22 and the second stirring part 23 in the mixing tank 5 by using the connecting shaft 21, heating, stirring and mixing the mixture in the mixing tank 5 by using the first stirring part 22 and the second stirring part 23, closing the spiral heating ring 31 and the electric heating rod 26 after uniform mixing, introducing cooling water into a water inlet pipe 33, the mixed material in the mixing tank 5 is cooled by the cooling coil 32, and the mixed material is sent out through the discharge pipe 8, so that the humic acid long-acting formula fertilizer is obtained.

Example 3

Referring to fig. 1-4, a humic acid long-acting formula fertilizer comprises, by weight, 40 parts of humic acid, 15 parts of corn straw, 4 parts of micronutrient elements, 0.09 part of composite strain, 40 parts of modified starch, 25 parts of polyvinyl alcohol, 20 parts of modified chitosan acetic acid solution, 13 parts of liquid paraffin and 4 parts of dibutyl phthalate;

mixing humic acid and corn straw, crushing the mixture by using a crusher, screening the crushed material by using a 60-mesh sieve, then putting the screened material into a fermentation tank, uniformly mixing, inoculating a composite strain, controlling the humidity in the fermentation tank to be 62.5%, fermenting for 10 days at the temperature of 67.5 ℃, finally, carrying out ventilation drying on the fermented material after fermentation is finished, crushing by using the crusher, and screening the crushed fermented material by using the 60-mesh sieve again to obtain a fermented base material;

adding the fermentation base material into the modified chitosan acetic acid solution, heating and stirring in an oil bath kettle at 45 ℃, stirring for 30 minutes, cooling to obtain an intermediate, then taking liquid paraffin and dibutyl phthalate for mixing, mixing and stirring at the rotation speed of 900r/min and the temperature of 45 ℃, and stirring for 15 minutes to obtain the additive;

step four, adding the intermediate into the additive, stirring and mixing at the rotating speed of 400r/min and the temperature of 35 ℃, stirring for 2 hours, and washing, filtering and drying to obtain porous slow-release particles;

step five, introducing the porous slow-release particles, the prepolymer, the fermentation base material and the micronutrient into a mixing device, introducing the mixture into the mixing device through a feeding pipe 7, introducing the mixture into a mixing tank 5, regulating and controlling the output power of a spiral heating ring 31 by using a controller 9, controlling the internal temperature of the mixing tank 5 to be 85 ℃, simultaneously opening a switch of an electric heating rod 26 in a second stirring part 23, controlling the temperature of the electric heating rod 26 to be 80 ℃, starting a driving assembly 1, driving a driving shaft 13 to rotate by using a speed reducer 12, driving a connecting shaft 21 to rotate in the mixing tank 5 through the driving shaft 13, simultaneously rotating the first stirring part 22 and the second stirring part 23 in the mixing tank 5 by using the connecting shaft 21, heating, stirring and mixing the mixture in the mixing tank 5 by using the first stirring part 22 and the second stirring part 23, closing the spiral heating ring 31 and the electric heating rod 26 after uniform mixing, introducing cooling water into a water inlet pipe 33, the mixed material in the mixing tank 5 is cooled by the cooling coil 32, and the mixed material is sent out through the discharge pipe 8, so that the humic acid long-acting formula fertilizer is obtained.

The trace nutrient elements are a mixture of nitrogen, phosphorus and potassium in any proportion, and the composite strain is one or more of bacillus megaterium, potassium bacteria, saccharomycetes, nitrogen-fixing rhizobia, free-living nitrogen-fixing bacteria and combined nitrogen-fixing bacteria in any proportion.

The modified starch is prepared by the following method:

The modified chitosan acetic acid solution is prepared by the following method:

Referring to fig. 1-4, the mixing apparatus includes a housing 4, a mixing tank 5, a driving assembly 1 and a stirring assembly 2, the mixing tank 5 is located inside the housing 4, a top cover 6 is disposed on the top of the housing 4, a feeding pipe 7 is fixedly connected to the top of the top cover 6, the bottom end of the feeding pipe 7 penetrates through the top cover 6 and the mixing tank 5 and extends to the inside of the mixing tank 5, the inside of the feeding pipe 7 is communicated with the inside of the mixing tank 5, a discharging pipe 8 is communicated with the bottom end of the mixing tank 5, the bottom end of the discharging pipe 8 penetrates through the housing 4 and extends to the bottom of the housing 4, a temperature control assembly 3 is disposed on the surface of the mixing tank 5, a controller 9 is disposed on the front surface of the housing 4, the driving assembly 1 is located on the top of the top cover 6, the stirring assembly 2 is located inside the mixing tank 5, the driving assembly 1 includes a fixing frame 11, a speed reducer 12, the top of the fixing frame 11 is fixedly connected with the bottom of the speed reducer 12, the output end of the speed reducer 12 is fixedly connected with the top end of the driving shaft 13, the bottom end of the driving shaft 13 penetrates through the shell 4 and the mixing tank 5 and extends into the mixing tank 5, the stirring assembly 2 comprises a connecting shaft 21, a first stirring part 22, a second stirring part 23 and a connecting part 24, the top end of the connecting shaft 21 is fixedly connected with one end of the driving shaft 13 extending into the mixing tank 5 through a coupler, the top of the first stirring part 22 is fixedly connected with the surface of the connecting shaft 21, the top end of the second stirring part 23 is fixedly connected with the bottom end of the connecting shaft 21, the bottom of the connecting part 24 is fixedly connected with the bottom of the first stirring part 22, the top of the connecting part 24 is fixedly connected with the lower part of the surface of the second stirring part 23, a mounting groove 25 is formed in the second stirring part 23, an electric heating rod 26, Cooling coil 32, inlet tube 33 and outlet pipe 34, and the inner wall of spiral heating coil 31 is connected with the fixed surface of blending tank 5, and cooling coil 32's inner wall is connected with the fixed surface of blending tank 5, and the one end of inlet tube 33 and outlet pipe 34 communicates with cooling coil 32's upper and lower both ends respectively, and the one end of inlet tube 33 and outlet pipe 34 all runs through shell 4 and extends to the outside of shell 4.

step five, introducing the porous slow-release particles, the prepolymer, the fermentation base material and the micronutrients into a mixing device, putting the mixture into a mixing tank 5 through a feeding pipe 7, regulating and controlling the output power of a spiral heating ring 31 by using a controller 9, controlling the internal temperature of the mixing tank 5 to be 80-90 ℃, simultaneously turning on an electric heating rod 26 switch in a second stirring part 23, controlling the temperature of the electric heating rod 26 to be 80 ℃, starting a driving component 1, driving a driving shaft 13 to rotate by using a speed reducer 12, driving a connecting shaft 21 to rotate in the mixing tank 5 through the driving shaft 13, simultaneously rotating the first stirring part 22 and the second stirring part 23 in the mixing tank 5 by using the connecting shaft 21, heating, stirring and mixing the mixed materials in the mixing tank 5 by using the first stirring part 22 and the second stirring part 23, and closing the spiral heating ring 31 and the electric heating rod 26 after the mixed materials are uniformly mixed, and (3) introducing cooling water into the water inlet pipe 33, cooling the mixed material inside the mixing tank 5 by using the cooling coil pipe 32, and sending out the mixed material through the discharge pipe 8 to obtain the humic acid long-acting formula fertilizer.

And those not described in detail in this specification are well within the skill of those in the art.

The working principle of the mixing equipment is that when the mixing equipment is used, materials are put into a mixing tank 5 through a feeding pipe 7, the output power of a spiral heating ring 31 is regulated and controlled through a controller 9, the temperature in the mixing tank 5 is controlled to be 80-90 ℃, meanwhile, an electric heating rod 26 switch in a stirring part II 23 is turned on, the temperature of the electric heating rod 26 is 80 ℃, a driving assembly 1 is started, a speed reducer 12 drives a driving shaft 13 to rotate, a connecting shaft 21 is driven through the driving shaft 13 to rotate in the mixing tank 5, the stirring part I22 and the stirring part II 23 are simultaneously rotated in the mixing tank 5 through the connecting shaft 21, the stirring part I22 and the stirring part II 23 heat, stir and mix the mixed materials in the mixing tank 5, after the mixed materials are uniformly mixed, the spiral heating ring 31 and the electric heating rod 26 are closed, cooling water is introduced into a water inlet pipe 33, the mixed materials in the mixing tank 5 are cooled through a cooling coil 32, and (4) delivering the mixed material through a discharge pipe 8 to obtain the humic acid long-acting formula fertilizer.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A humic acid long-acting formula fertilizer is characterized in that: the raw materials comprise, by weight, 30-50 parts of humic acid, 10-20 parts of corn straw, 3-5 parts of trace nutrient elements, 0.08-0.10 part of composite strain, 30-50 parts of modified starch, 20-30 parts of polyvinyl alcohol, 10-30 parts of modified chitosan acetic acid solution, 10-16 parts of liquid paraffin and 3-5 parts of dibutyl phthalate;

step five, introducing the porous slow-release particles, the prepolymer, the fermentation base material and the micronutrients into a mixing device, putting the mixture into a mixing tank (5) through a feeding pipe (7), regulating and controlling the output power of a spiral heating ring (31) by using a controller (9), controlling the internal temperature of the mixing tank (5) to be 80-90 ℃, simultaneously opening a switch of an electric heating rod (26) in a second stirring part (23), controlling the temperature of the electric heating rod (26) to be 80 ℃, starting a driving assembly (1), driving a driving shaft (13) to rotate by a speed reducer (12), driving a connecting shaft (21) to rotate in the mixing tank (5) through the driving shaft (13), enabling the first stirring part (22) and the second stirring part (23) to rotate in the mixing tank (5) simultaneously by using the connecting shaft (21), heating, stirring and mixing the mixture in the mixing tank (5) by the first stirring part (22) and the second stirring part (23), after the humic acid long-acting formula fertilizer is uniformly mixed, the spiral heating ring (31) and the electric heating rod (26) are closed, cooling water is introduced into the water inlet pipe (33), the mixed material in the mixing tank (5) is cooled by using the cooling coil pipe (32), and the mixed material is sent out through the discharge pipe (8), so that the humic acid long-acting formula fertilizer is obtained.

2. The humic acid long-acting formula fertilizer as claimed in claim 1, which is characterized in that: the micronutrient is a mixture of nitrogen, phosphorus and potassium in any proportion, and the composite strain is one or more of bacillus megaterium, potassium bacteria, saccharomycetes, nitrogen-fixing rhizobia, free-living nitrogen-fixing bacteria and combined nitrogen-fixing bacteria in any proportion.

3. The humic acid long-acting formula fertilizer as claimed in claim 1, which is characterized in that: the modified starch is prepared by the following method:

4. The humic acid long-acting formula fertilizer as claimed in claim 1, which is characterized in that: the modified chitosan acetic acid solution is prepared by the following method:

5. The humic acid long-acting formula fertilizer as claimed in claim 1, which is characterized in that: the mixing equipment comprises a shell (4), a mixing tank (5), a driving assembly (1) and a stirring assembly (2), wherein the mixing tank (5) is positioned in the shell (4), a top cover (6) is arranged at the top of the shell (4), a feeding pipe (7) is fixedly connected with the top of the top cover (6), the bottom end of the feeding pipe (7) penetrates through the top cover (6) and the mixing tank (5) and extends to the inside of the mixing tank (5), the inside of the feeding pipe (7) is communicated with the inside of the mixing tank (5), a discharging pipe (8) is communicated with the bottom end of the mixing tank (5), the bottom end of the discharging pipe (8) penetrates through the shell (4) and extends to the bottom of the shell (4), a temperature control assembly (3) is arranged on the surface of the mixing tank (5), a controller (9) is arranged on the front surface of the shell (4), and the driving assembly (1) is positioned at the top of the top cover (, the stirring assembly (2) is positioned inside the mixing tank (5).

6. The humic acid long-acting formula fertilizer as claimed in claim 5, which is characterized in that: drive assembly (1) includes mount (11), speed reducer (12) and drive shaft (13), and the bottom of mount (11) and the top fixed connection of top cap (6), the top of mount (11) and the bottom fixed connection of speed reducer (12), and the output of speed reducer (12) and the top fixed connection of drive shaft (13), shell (4) and blending tank (5) are run through and extend to the inside of blending tank (5) to the bottom of drive shaft (13).

7. The humic acid long-acting formula fertilizer as claimed in claim 5, which is characterized in that: stirring subassembly (2) is including connecting axle (21), stirring portion (22), stirring portion two (23), connecting portion (24), and the top of connecting axle (21) and drive shaft (13) extend to the inside one end of blending tank (5) and pass through shaft coupling fixed connection, the top of stirring portion one (22) is connected with the fixed surface of connecting axle (21), and the top of stirring portion two (23) and the bottom fixed connection of connecting axle (21), the bottom of connecting portion (24) and the bottom fixed connection of stirring portion one (22), and the top of connecting portion (24) and the below fixed connection on stirring portion two (23) surface, mounting groove (25) have been seted up to the inside of stirring portion two (23), and the inside of mounting groove (25) is provided with electric heat bar (26).

8. The humic acid long-acting formula fertilizer as claimed in claim 5, which is characterized in that: temperature control unit (3) include spiral heating circle (31), cooling coil (32), inlet tube (33) and outlet pipe (34), and the fixed surface of the inner wall of spiral heating circle (31) and blending tank (5) is connected, the fixed surface of the inner wall of cooling coil (32) and blending tank (5) is connected, inlet tube (33) and the one end of outlet pipe (34) communicate with the upper and lower both ends of cooling coil (32) respectively, and inlet tube (33) and the one end of outlet pipe (34) all run through shell (4) and extend to the outside of shell (4).

9. A preparation method of humic acid long-acting formula fertilizer is characterized by comprising the following steps: the method specifically comprises the following steps: