A humic acid production device and production process using biomass processing

Abstract

The present invention discloses a humic acid production device and a production process thereof using biomass processing, and relates to the field of humic acid separation and extraction. The humic acid production device comprises a tank body, a separation cylinder is rotatably connected in the tank body, a filter is arranged on the side wall and the bottom surface of the separation cylinder, and a stirring structure is slidably connected to the inner wall and the outer wall of the separation cylinder; a mixing box is arranged on the tank body, and the mixing box is connected to the separation cylinder through a liquid guide tube; a temperature regulating part is arranged on the inner wall of the tank body. The present invention prepares a mixed bacterial agent suitable for biomass processing and extraction of humic acid, so that the biomass can be decomposed more fully in the decomposition process, and the mixing box can fully mix the decomposition product powder with the extract, and discharge the mixture into the separation cylinder. After the humic acid extraction work is completed, the separation cylinder can be lifted to quickly separate the solid matter in the tank body, which is convenient for the subsequent process.

Description

Technical Field

[0001] The present invention relates to the field of humic acid separation and extraction, and in particular to a humic acid production device and a production process thereof using biomass processing. Background Art

[0002] Humic acid is a macromolecular organic substance widely existing in nature and is widely used in agriculture, forestry, animal husbandry, petroleum, chemical industry, medicine, health, environmental protection and other fields. Humic acid can be dissolved in alkali but insoluble in water and acid.

[0003] At present, humic acid is mainly extracted from silt, lignite and weathered coal. However, lignite and weathered coal are non-renewable resources. Over-exploitation will lead to the problem of raw material depletion. Silt contains a lot of heavy metals and bacteria. Improper handling may affect the safe use of humic acid fertilizers.

[0004] Chinese patent with announcement number CN108329487A discloses a method and application of extracting humic acid from straw. The above patent extracts humic acid from straw by means of decomposition.

[0005] With regard to the above-mentioned related technologies, the existing process of humic acid production using straw has a relatively simple process flow of composting and decomposing, which is prone to insufficient utilization of straw. The yield of humic acid produced under limited biomass conditions is low, and various metal salt impurities are easily mixed into the process of extracting humic acid, affecting the quality of the final humic acid fertilizer. The existing humic acid extraction process generally uses a conventional stirring tank to mix humus and extracting liquid. After the humic acid is extracted into the mixed liquid, subsequent filtering, dehydration and other steps are required. The humic acid extraction process is relatively complicated, and it is necessary to use a variety of equipment to cooperate in the extraction of humic acid, which in turn affects the production efficiency and production quality of humic acid. Summary of the invention

[0006] The purpose of the present invention is to provide a humic acid production device and a production process thereof using biomass processing to solve the above technical problems.

[0007] The objective of the present invention is achieved through the following technical solutions:

[0008] The present invention provides a humic acid production device using biomass processing, comprising:

[0009] A tank body, wherein a separation cylinder is rotatably connected in the tank body, a filter screen is arranged on the side wall and the bottom surface of the separation cylinder, and a stirring structure is arranged on the inner wall and the outer wall of the separation cylinder and is slidably connected to each other; a mixing box is arranged on the tank body, and the mixing box is directed toward the separation cylinder through a liquid guide tube;

[0010] The temperature regulating part is arranged on the inner wall of the tank body.

[0011] As some specific embodiments of the present invention, a liquid dispersion tube is rotatably connected in the mixing box, one end of the liquid dispersion tube is connected to the submersible pump inside the tank body through a connecting tube and a liquid infusion pipeline, and the other end is connected to the first driving structure, and a plurality of openings are provided on the liquid dispersion tube;

[0012] The mixing box is provided with a spiral feeding structure facing the liquid dispersion pipe;

[0013] An arc-shaped liquid baffle plate is provided in the mixing box, and a liquid guide tube is connected to the side of the liquid baffle plate away from the liquid dispersion tube, the top of the liquid guide tube is located in the mixing box, and the bottom extends out of the mixing box and toward the tube mouth of the separation tube; the top of the liquid guide tube is higher than the bottom of the liquid baffle plate, and the liquid level in the mixing box is higher than the top of the liquid guide tube and lower than the bottom of the liquid dispersion tube.

[0014] By adopting the above technical solution, the mixing box can fully mix the decomposition product powder with the extract. When the submersible pump is working, the extract in the tank is pumped upward into the liquid dispersion tube. The driving motor (first driving structure) coaxially connected to the liquid dispersion tube outside the mixing box drives the liquid dispersion tube to rotate. The liquid entering the liquid dispersion tube is thrown out along the openings on the side walls of the liquid dispersion tube and is evenly mixed with the powder entering the mixing box through the feed hopper and the spiral feeding mechanism, so that the decomposition product powder can be evenly blended with the extract more quickly, and the mixture is discharged into the separation cylinder through the liquid guide tube.

[0015] As some specific embodiments of the present invention, a circular opening is provided on the top of the tank body, and a cover plate is installed at the opening. The cover plate (on the bottom surface facing the inside of the tank body) is rotatably connected to a connecting frame, and the connecting frame is fixedly connected to the separating cylinder. The separating cylinder is coaxial with the tank body, and the diameter of the separating cylinder is smaller than the diameter of the circular opening at the top of the tank body. The rotating shaft of the connecting frame passes through the cover plate upward and is connected to a second driving structure.

[0016] As some specific embodiments of the present invention, the inner wall of the separation cylinder is fixedly connected with a fixed rod inclined upward, and a sliding rod passing through the separation cylinder is connected to slide obliquely downward along the inclination direction of the fixed rod; the fixed rod is provided with a sliding groove on one side which is slidably connected to the sliding rod, and the top end of the sliding rod is slidably connected in the sliding groove.

[0017] The fixed rod is arranged in multiple layers along the axial direction of the separation cylinder, each layer is distributed in a ring-shaped manner and corresponds to the sliding rod one by one. The fixed rod and the stirring blade connected to the fixed rod can stir the solid-liquid mixture in the separation cylinder. At the same time, the fixed rod also guides the sliding of the sliding rod.

[0018] During the humic acid extraction process, the extract is dissolved in the liquid in the separation cylinder, and the sliding rod outside the separation cylinder stirs the liquid outside the separation cylinder as the separation cylinder rotates, which can promote the exchange of liquid inside and outside the separation cylinder. After the humic acid extraction is completed, the separation cylinder is lifted, and the liquid in the separation cylinder flows back into the tank body by gravity, and the solid product remains in the separation cylinder, so that the solid-liquid separation in the tank body can be achieved more conveniently without discharging the contents of the tank body, which is convenient for the subsequent process.

[0019] As some specific embodiments of the present invention, the temperature adjustment part includes a temperature adjustment wall, a liquid inlet pipe and a liquid discharge pipe;

[0020] The temperature regulating wall is a hollow structure and is arranged along the inner side of the tank body. The top ends of the liquid inlet pipe and the liquid discharge pipe extend from the top of the tank body respectively, and the bottom ends extend into the interior of the temperature regulating wall. The bottom end of the liquid inlet pipe is close to the bottom of the temperature regulating wall, and the bottom end of the liquid discharge pipe is close to the top of the temperature regulating wall.

[0021] By adopting the above technical solution, the liquid in the hollow temperature regulating wall is used for indirect temperature transfer, which can effectively avoid the situation where the temperature in various places in the tank body is uneven.

[0022] As some specific embodiments of the present invention, a sealing cover is installed on the top of the tank body, and a vacuum pipe is also provided on the tank body.

[0023] After separating the solid product in the separation cylinder, the vacuum pipe is used to reduce the air pressure in the tank, and the remaining solution in the tank is heated to boiling through the temperature control part. At the same time, the steam generated in the tank is extracted. After solids are precipitated in the solution, the heating is stopped and the air pressure is continued to be reduced. After the liquid is evaporated, the humic acid product is obtained.

[0024] The present invention also discloses a humic acid production process using biomass processing, comprising the following steps:

[0025] S1. Mixing: Evenly mix the biomass fragments and the mixed bacterial agent;

[0026] S2, performing aerobic decomposition and anaerobic decomposition in sequence, drying and crushing to obtain decomposition product powder;

[0027] S3, dissolution and extraction: mixing the decomposition product powder with the potassium hydroxide ethanol solution in the humic acid production equipment, adjusting the pH and separating the solid;

[0028] S4, evaporation and precipitation: The remaining solution in the production equipment is heated and evaporated to precipitate solids, and the humic acid product is obtained after the liquid is completely evaporated.

[0029] As some specific embodiments of the present invention, in step S3, the decomposition product powder enters the mixing box through the spiral feeding mechanism, the potassium hydroxide ethanol solution in the tank body is pumped into the bulk liquid tube by the submersible pump through the infusion pipe and the connecting pipe, and enters the mixing box through the opening on the bulk liquid tube under the action of the first driving structure to be mixed with the decomposition product powder, and after mixing, enters the separation cylinder through the liquid guide tube, the second driving structure drives the separation cylinder and the stirring structure to rotate, and under the action of the stirring structure, it is fully mixed and stirred with the potassium hydroxide ethanol solution in the tank body again, the pH in the tank body is adjusted, the separation cylinder is lifted, and the solid product is separated.

[0030] As some specific embodiments of the present invention, in step S4, after the separation cylinder and the solid product therein are separated, a sealing cover is put on, the air pressure in the tank body is reduced by a vacuum pipe, the remaining solution in the tank body is heated to boiling through a temperature control part, and the steam generated in the tank body is extracted at the same time. After solids are precipitated in the solution in the tank body, the heating is stopped, and the air pressure is continued to be reduced. After the liquid is evaporated, a humic acid product is obtained.

[0031] As some specific embodiments of the present invention, in step S1, the carbon-nitrogen ratio of the biomass fragments is adjusted to 25-30:1 by adding urea thereto.

[0032] As some specific embodiments of the present invention, in step S1, the biomass fragments are biomass with a length not exceeding 2 cm, and the biomass is one or more of rice husks, peanut shells, bagasse, distiller's grains, sugar residues, sawdust, oil residues, leaves, weeds, and straw.

[0033] As some specific embodiments of the present invention, the biomass is a mixture of sawdust and straw, and the mass ratio of the sawdust to the straw is 1:3-1:5.

[0034] As some specific embodiments of the present invention, the biomass is a mixture of rice husks and straws; the mass ratio of the rice husks to the straws is 1:2-2:1.

[0035] As some specific embodiments of the present invention, the water content of the biomass fragments is 55%-65%.

[0036] As some specific embodiments of the present invention, the mass percentage of the mixed bacterial agent in the mixture of biomass fragments and the mixed bacterial agent is 2-2.5%, and the mixed bacterial agent includes Bacillus subtilis, yeast, black mold, photosynthetic bacteria, Aspergillus, Gram-positive actinomycetes, and Bifidobacterium.

[0037] As some specific embodiments of the present invention, in step S1, the mixed bacterial agent is composed of the following components in parts by weight:

[0038] The content is not less than 10×10 8cfu / g of Bacillus subtilis agent 15-20 weight parts, content not less than 2×10 8 cfu / g yeast agent 12-15 weight parts, content not less than 1×10 8 cfu / g of black mold agent 2-5 weight parts, content not less than 1×10 8 cfu / g photosynthetic bacteria agent 10-15 parts by weight, content not less than 2×10 8 cfu / g of Aspergillus agent 5-10 parts by weight, content not less than 1×10 8 cfu / g of Gram-positive actinomycete agent 2-5 parts by weight, content not less than 10×10 8 cfu / g of Bifidobacterium agent 5-8 weight parts.

[0039] As some specific embodiments of the present invention, in step S2, the aerobic decomposition includes stacking on hardened and flat ground, in an environment that is leeward, sunny and sheltered from rain; when stacking, the mixture is stacked into a stack with a trapezoidal cross-section, and the initial stack has a height of 1.8-2.2m and a width of 2.5-5m.

[0040] As some specific embodiments of the present invention, in step S2, the aerobic decomposition time is 60-90 days, during which the temperature of the pile is measured every 11-13 hours, and the pile is turned when the temperature of the pile is higher than 60°C;

[0041] And / or, in step S2, during the aerobic decomposition, the water content of the pile is maintained at 60-65%.

[0042] As some specific embodiments of the present invention, in step S2, during the anaerobic decomposition, the pH value of the pile needs to be adjusted to 7.0-8.0.

[0043] Further, the pH value of the pile is adjusted by uniformly mixing an acidic or alkaline solution into the pile;

[0044] and / or creating anaerobic conditions by covering the pile with plastic film;

[0045] And / or, the temperature of the pile is checked every 11-13 hours, the pile is turned every 5-10 days, and decomposition is completed when the temperature of the pile stabilizes at 30-35°C.

[0046] As some specific embodiments of the present invention, the compost turning is performed using a compost turning machine.

[0047] As some specific embodiments of the present invention, in step S2, the drying method is air drying, and the air drying is performed until the water content of the decomposition product is less than 10%;

[0048] And / or, the pulverizing is to pulverize the dried decomposition product into 50-100 meshes.

[0049] As some specific embodiments of the present invention, in step S3, the solid-liquid ratio of the solid-liquid mixture obtained after mixing and stirring the decomposition product powder with the potassium hydroxide ethanol solution is 1:12-16.

[0050] As some specific embodiments of the present invention, in step S3, the concentration of the potassium hydroxide ethanol solution is 0.4-0.6 mol / L;

[0051] And / or, the mass fraction of the dilute hydrochloric acid is 10-15%;

[0052] And / or, the mixing and stirring time is 8-12 hours and the temperature is 30-35°C.

[0053] As some specific embodiments of the present invention, in step S3, the pH is adjusted by dilute hydrochloric acid;

[0054] And / or, the pH is 7±0.5.

[0055] As some specific embodiments of the present invention, in step S4, the heating of the remaining solution in the production equipment is to heat the remaining solution to boiling under a gas pressure of 5-10 kPa, stop heating after solid precipitates in the solution, and continue to reduce the gas pressure to 2.5-5 kPa.

[0056] As some specific embodiments of the present invention, the humic acid production process further comprises: drying and crushing the humic acid product, using a granulator to make it into 2-4 mm particles, and sealing and packaging it to store it away from light.

[0057] As some specific embodiments of the present invention, the humic acid production process using biomass processing specifically includes the following steps:

[0058] a1. The biomass to be processed is crushed to a length not exceeding 2 cm, the moisture content of the biomass fragments is adjusted to 55-65%, urea is added to adjust the carbon-nitrogen ratio of the biomass fragments to 25-30: 1, and then the biomass fragments are evenly mixed with a mixed bacterial agent accounting for 2-2.5% of the total mass percentage, the mixed bacterial agent is composed of Bacillus subtilis, yeast, black mold, photosynthetic bacteria, Aspergillus, Gram-positive actinomycetes, and Bifidobacterium;

[0059] a2. Choose a hardened and flat ground, leeward, sunny and rainproof, and pile the mixed biomass fragments into a trapezoidal cross-section. The initial pile height is 1.8-2.2m and the width is 2.5-5m. During the stacking period, the temperature of the pile is tested every 12 hours. When the temperature exceeds 60℃, the pile can be turned by a compost turner. Water is added to the pile in time to maintain the moisture content of the pile at 60-65%. The stacking time is 60-90 days;

[0060] a3. Evenly mix acidic or alkaline solution into the pile to adjust the pH value of the pile to between 7-8, cover the pile with plastic film, turn the pile every 5-10 days with a compost turner, check the temperature of the pile every 12 hours, and complete the decomposition of biomass when the temperature of the pile stabilizes to 30-35℃;

[0061] a4. Air-dry the decomposed biomass to a moisture content of less than 10%, and further grind the decomposition product to a powder of 50-100 mesh;

[0062] b1. Evenly mix the powdered decomposition product into 0.5 mol / L potassium hydroxide ethanol solution, adjust the solid-liquid ratio in the solid-liquid mixture to 1:12-16, mix and stir at 30-35°C for 8-12h, then add 10-15% mass fraction of dilute hydrochloric acid and mix and stir, and adjust the pH value of the mixture to 7±0.5;

[0063] b2. Separate the solids from the mixture, heat the remaining solution to boiling at a pressure of 5-10kPa, stop heating after solids precipitate out of the solution, continue to reduce the pressure to 2.5-5kPa, and the humic acid product is obtained after the liquid is evaporated;

[0064] b3. Dry and crush the humic acid product, use a granulator to make the powdered humic acid product into 2-4mm particles, and then seal and package them to store them away from light.

[0065] Compared with the prior art, the present invention has the following beneficial effects:

[0066] 1) The present invention prepares a mixed bacterial agent suitable for extracting humic acid from biomass, so that the biomass can be decomposed more fully in the decomposition process, and the mixing box can fully mix the decomposition product powder with the extract, and discharge the mixture into the separation cylinder. After the humic acid extraction work is completed, the separation cylinder can be lifted to quickly separate the solid matter in the tank body, which is convenient for the subsequent process;

[0067] 2) The present invention drives the separation cylinder inside the tank body to rotate through the driving structure, and uses the stirring rod structure connected to the separation cylinder to stir the solid-liquid mixture and the extract in the tank body, which can effectively improve the uniformity of the mixing of the chemical agents in the tank body, thereby improving the production quality of humic acid;

[0068] 3) The present invention provides a hollow temperature-adjusting wall in the tank body. When the temperature of the liquid in the tank body needs to be adjusted, the temperature of the liquid flowing through the temperature-adjusting wall can be controlled to achieve indirect heat transfer, so that the temperature change rate of the liquid in various places in the tank body is more uniform, thereby avoiding a sharp temperature change at a certain place in the tank body;

[0069] 4) The present invention connects the stirring structure of the outer wall of the separation cylinder to the separation cylinder by sliding. When the separation cylinder is lifted, the stirring structure of the outer wall can be squeezed by the opening of the tank body and slide upward obliquely. The stirring structure of the outer wall of the separation cylinder is guided by the guide structure and can slide more stably toward the oblique upper side of the inner wall of the separation cylinder, so that the stirring structure of the outer wall of the separation cylinder is retracted into the separation cylinder, which is convenient for lifting the separation cylinder out of the tank body, thereby quickly separating the solid and liquid in the tank body, so that the solution in the tank body can directly proceed to the next step;

[0070] 5) The present invention provides a liquid extraction structure in the tank body to continuously introduce the extracting liquid in the tank body into the mixing box. After entering the mixing box, the extracting liquid flows into the dispersion pipe. The dispersion pipe rotates to throw the liquid inside along the holes on the side wall, so that the extracting liquid and the powdered decomposition product delivered by the spiral feeding structure are evenly mixed;

[0071] 6) The present invention provides a baffle structure in the mixing box, and makes the pipe opening of the liquid guide tube higher than the bottom end of the baffle, and makes the liquid level inside the mixing box higher than the top end of the liquid guide tube, so as to prevent the powdery decomposition products floating in the mixing box from being discharged from the liquid guide tube, thereby further improving the uniformity of mixing the powdery decomposition products and the extract;

[0072] 7) The humic acid production equipment and process of the present invention can produce humic acid with higher carbon content, humic acid with higher carbon content and humic acid to humic acid ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0074] Figure 1 This is a three-dimensional structural diagram of humic acid production equipment;

[0075] Figure 2 It is a schematic diagram of the three-dimensional structure inside the tank;

[0076] Figure 3 This is a schematic diagram of the three-dimensional structure of the inside of the tank from another perspective;

[0077] Figure 4 It is a schematic diagram of the three-dimensional structure of the separation cylinder;

[0078] Figure 5 for Figure 4A magnified view of middle;

[0079] Figure 6 is a cross-sectional view of the tank;

[0080] Figure 7 for Figure 6 Enlarged view of middle B;

[0081] Figure 8 A schematic diagram of the three-dimensional structure of a sealing cover on the tank body;

[0082] Fig. 9 It is a schematic diagram of the three-dimensional structure inside the mixing box;

[0083] Fig.10 The figure is a schematic diagram of the process of producing humic acid by biomass processing according to the present invention.

[0084] In the figure: 1. tank body; 2. cover plate; 3. connecting frame; 4. dividing cylinder; 401. fixing rod; 402. sliding rod; 403. slide groove; 5. supporting frame; 6. mixing box; 601. feeding hopper; 602. feeding pipe; 603. dispersion pipe; 604. connecting pipe; 605. liquid baffle plate; 606. liquid guide pipe; 7. temperature control wall; 701. liquid inlet pipe; 702. liquid discharge pipe; 8. submersible pump; 9. liquid infusion pipe; 10. sealing cover; 11. observation window; 12. vacuum pipe. DETAILED DESCRIPTION

[0085] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0086] Example 1

[0087] A humic acid production equipment using biomass processing, which is used for the dissolution extraction and evaporation precipitation processes in the humic acid production process. Figure 1-3 As shown, it includes a tank body 1, a separation cylinder 4 is connected to the tank body 1, the side wall and the bottom surface of the separation cylinder 4 are both provided with a filter screen, the mesh diameter of the filter screen is smaller than the particle size of the decomposition product powder, and a mixing box 6 is provided at the top of the tank body 1.

[0088] like Fig. 9As shown, a liquid dispersion tube 603 is rotatably connected in the mixing box 6, a spiral feeding structure facing the liquid dispersion tube 603 is installed above the mixing box 6, an arc-shaped liquid baffle plate 605 is connected in the mixing box 6, and a liquid guide tube 606 is connected to the side of the liquid baffle plate 605 away from the liquid dispersion tube 603. In order to make the solid-liquid mixture in the mixing box 6 flow into the separation cylinder 4 faster, the shape of the liquid guide tube 606 adopts the steepest descending linear bend.

[0089] like Figure 2 As shown, the liquid conduit 606 extends out of the mixing box 6, and the bottom end faces the tube mouth of the separation cylinder 4. The bottom end of the liquid conduit 606 is higher than the top of the separation cylinder 4. The solid-liquid mixture flowing out of the liquid conduit 606 flows into the separation cylinder 4 due to inertia and its own gravity. The separation cylinder 4 rotates under the drive of the driving structure and will not collide with the liquid conduit 606. In order to prevent the connecting frame 3 from blocking the falling mixed liquid, the rotation of the separation cylinder 4 and the feeding of the mixing box 6 are not carried out at the same time.

[0090] like Figure 6 , 7 As shown in Figures 9 and 10, a feed hopper 601 is installed at the top of the tank body 1 above the mixing box 6. In order not to block the lifting path of the partition cylinder 4, the feed hopper 601 is vertically shaped on one side close to the center of the tank body 1, while the other side is bucket-shaped. The bottom end of the feed hopper 601 is connected to a feed pipe 602, and a screw-type powder conveying assembly is specifically installed in the feed pipe 602. A connecting pipe 604 is fixedly connected to the side wall of the mixing box 6. One end of the connecting pipe 604 is connected to the liquid infusion pipeline 9, and the other end is inserted into the liquid dispersion pipe 603. When the submersible pump 8 is working, the extraction liquid in the tank body 1 is pumped upward, and enters the liquid dispersion tube 603 through the infusion pipe 9 and the connecting pipe 604 in turn. The driving motor (first driving structure) coaxially connected to the liquid dispersion tube 603 outside the mixing box 6 drives the liquid dispersion tube 603 to rotate, and the liquid entering the liquid dispersion tube 603 is thrown out along the opening on the side wall of the liquid dispersion tube 603, and is evenly mixed with the powder entering the mixing box 6 through the feed hopper and the feeding pipe, so that the decomposition product powder can be more quickly and evenly integrated with the extraction liquid.

[0091] The top of the liquid guide tube 606 is higher than the bottom of the liquid baffle 605, so that the decomposition product powder floating in the mixing box 6 cannot directly enter the liquid guide tube 606. The liquid level in the mixing box 6 is higher than the top of the liquid guide tube 606 and lower than the bottom of the liquid dispersion tube 603. The extract thrown out from the side wall of the liquid dispersion tube 603 has a certain initial velocity. The extract thrown to the liquid surface in the mixing box 6 can impact the liquid in the mixing box 6, thereby stirring the solution in the mixing box 6. The liquid sprayed from the liquid dispersion tube 603 is evenly mixed with the decomposition product powder entering the mixing box 6, so that the decomposition product powder is evenly mixed in the extract and then flows out along the liquid guide tube 606.

[0092] The outer wall of the mixing box 6 is connected to a first driving structure for driving the liquid dispersion tube 603 to rotate. The first driving structure is a driving motor installed on the outer wall of the mixing box 6. The output shaft of the driving motor is coaxially connected to the liquid dispersion tube 603. The first driving structure drives the liquid dispersion tube 603 to rotate, so that the liquid entering the liquid dispersion tube 603 can be evenly dispersed. One end of the liquid dispersion tube 603 located inside the mixing box 6 is connected to the output shaft of the driving motor, and the other end is rotatably connected to the connecting tube 604, which effectively improves the stability of the liquid dispersion tube 603 during rotation.

[0093] like Figure 1 and 2 As shown, the top of the tank body 1 is provided with a circular opening, and a cover plate 2 is installed at the opening. The bottom surface of the cover plate 2 is rotatably connected to a connecting frame 3 facing the inside of the tank body 1. The bottom end of the connecting frame 3 is fixedly connected to a separation cylinder 4 coaxial with the tank body 1. The diameter of the separation cylinder 4 is smaller than the opening at the top of the tank body 1. The rotating shaft of the connecting frame 3 passes through the cover plate 2 upward and is connected to a second driving structure. The top of the cover plate 2 is provided with a driving motor for driving the connection frame 3 to rotate. The output end of the motor is connected to the rotating shaft of the connecting frame 3 passing through the cover plate 2 by a transmission belt. The inner wall and the outer wall of the separation cylinder 4 are both connected to a stirring structure, and the separation cylinder 4 is used to contain the extract mixed with the decomposition product powder. The extract in the separation cylinder 4 and the extract in the tank body 1 can be freely exchanged through the cylinder wall of the separation cylinder 4. At the same time, the solid product in the separation cylinder 4 cannot diffuse through the cylinder wall of the separation cylinder 4 to between the inner wall of the tank body 1 and the outer wall of the separation cylinder 4. When it is necessary to separate the solid and liquid in the tank body 1, lift the separation cylinder 4, and the liquid in the separation cylinder 4 will flow back into the tank body 1 due to gravity, and the solid product will be separated from the tank body 1 along with the separation cylinder 4, so that the solid-liquid separation in the tank body 1 can be achieved more conveniently without discharging the contents of the tank body 1.

[0094] like Figure 4-5 As shown, the inner wall of the separation cylinder 4 is fixedly connected with a fixed rod 401 which is inclined upward, and along the inclined direction of the fixed rod 401, a sliding rod 402 which passes through the separation cylinder 4 is connected to slide obliquely downward, and a slide groove 403 is provided on the top surface of the fixed rod 401, and the top end of the sliding rod 402 is slidably connected in the slide groove 403. The fixed rod 401 is provided with multiple layers at intervals along the axial direction of the separation cylinder 4, and each layer is distributed in an annular interval and corresponds to the sliding rod 402 one by one. The fixed rod 401 and the stirring blade connected to the fixed rod 401 can stir the solid-liquid mixture in the separation cylinder 4, and the fixed rod 401 also guides the sliding of the sliding rod 402.

[0095] During the process of extracting humic acid, the extract is dissolved in the liquid in the separation cylinder 4, and the sliding rod 402 located outside the separation cylinder 4 rotates with the separation cylinder 4 to stir the liquid outside the separation cylinder 4, which can promote the exchange of liquid inside and outside the separation cylinder 4. When the separation cylinder 4 is lifted, the part of the sliding rod 402 located on the outer wall of the separation cylinder 4 will contact the opening of the tank body 1. When the separation cylinder 4 is lifted, the sliding rod 402 is limited by the opening of the tank body 1 and slides relative to the separation cylinder 4, and is slid and collected into the separation cylinder 4 under the guidance of the fixed rod 401. If the stirring structure is directly fixedly connected to the outside of the separation cylinder 4, in order to avoid the stirring structure fixedly connected to the outside of the separation cylinder 4 from interfering with the tank body 1 during the process of lifting it out of the tank body 1, the diameter of the separation cylinder 4 needs to be reduced to provide space for the stirring structure to be lifted out of the tank body 1; and through the above-mentioned setting of the present application, the diameter of the separation cylinder 4 can be designed as large as possible while maintaining the stirring structure, so that it can be used to accommodate more mixtures of decomposition product powder and extract.

[0096] like Figure 2 , 3 As shown in Figure 6, in order to further improve the rotation stability of the separation cylinder 4 in the tank body 1, a support frame 5 is installed inside the tank body 1 below the separation cylinder 4. The support frame 5 is used to support the separation cylinder 4. The liquid level of the solution in the tank body 1 is lower than the top of the separation cylinder 4, which can effectively prevent the solid-liquid mixture in the separation cylinder 4 from directly mixing with the solution outside the separation cylinder 4.

[0097] like Figure 3 , 6 As shown, a hollow temperature-regulating wall 7 is provided inside the tank body 1, and two ends of the top of the temperature-regulating wall 7 are respectively connected with a liquid inlet pipe 701 and a liquid discharge pipe 702, the bottom end of the liquid inlet pipe 701 is close to the bottom of the inner wall of the temperature-regulating wall 7, and the bottom end of the liquid discharge pipe 702 is close to the top of the inner wall of the temperature-regulating wall 7, and the liquid used for temperature regulation flows into the temperature-regulating wall 7 through the liquid inlet pipe 701, exchanges heat with the solution in the tank body 1 through heat conduction, and then is discharged from the liquid discharge pipe 702, so that the temperature-regulating wall 7 can be kept full of the temperature-regulating liquid. Since the temperature of the solution in the tank body 1 is not high, generally below sixty degrees Celsius, the solution in the tank body 1 generates heat convection by itself, thereby realizing heat exchange between the solutions in the tank body 1, and using the liquid in the hollow temperature-regulating wall 7 for indirect temperature transfer, it can effectively avoid the situation where the temperature in various places in the tank body 1 is uneven.

[0098] like Figure 8As shown, a sealing cover 10 can be installed on the top of the tank body 1, and an observation window 11 is also installed in the center of the sealing cover 10 to facilitate observation of the internal situation of the tank body 1. A vacuum pipe 12 is connected to the side of the top of the tank body 1 away from the mixing box 6. The vacuum pipe 12 is used to reduce the air pressure in the tank body 1 and extract the steam generated in the tank body 1. When it is necessary to reduce the water content of the solution in the tank body 1, the boiling point of the solution in the tank body 1 can be effectively reduced by reducing the air pressure in the tank body 1, so that the water and ethanol in the tank body 1 can evaporate more quickly, and at the same time, the influence of humic acid in the high-temperature reactor tank body is reduced. In order to further improve the airtightness of the tank body 1 when vacuuming, the top of the feed hopper 601 is also covered with a sealing cover.

[0099] The separation tube 4 and the solid product therein are lifted out of the tank body 1 along with the cover plate 2 (if the cover plate 2 is not lifted out, the humic acid precipitated later will adhere to the connecting frame 3 and the separation tube 4), and the sealing cover 10 is covered. The air pressure in the tank body 1 is reduced through the vacuum pipe 12, and at the same time, the liquid in the tank body 1 is heated to boiling through the temperature control part, and the steam generated in the tank body 1 is extracted to make the liquid in the tank body 1 evaporate quickly. After solid is precipitated in the tank body 1, the heating is stopped, and the air pressure is continued to be reduced. After the liquid is evaporated, a solid humic acid product is obtained.

[0100] When the above-mentioned equipment is used for the steps of dissolving, extracting, and evaporating the decomposition product powder, the operating principle of the equipment is as follows: the biomass is dried and crushed after decomposition, and is put into the feed hopper 601, and enters the mixing box 6 through the feeding pipe 602. The tank body 1 is filled with a pre-prepared extract. Under the operation of the submersible pump 8, the extract in the tank body 1 is extracted and pumped upward, and enters the liquid dispersion pipe 603 through the infusion pipe 9 and the connecting pipe 604 in turn. The driving motor (first driving structure) drives the liquid dispersion pipe 603 to rotate, and the liquid entering the liquid dispersion pipe 603 is thrown out along the opening on the side wall of the liquid dispersion pipe 603, is evenly mixed with the powder in the mixing box 6, and is discharged into the separation cylinder 4 through the liquid guide pipe 606. After being moistened by the solution, the solid powder enters the separation cylinder 4 and slowly sinks. After the required amount of decomposition product powder is added into the tank body 1, the second driving structure for rotating the separation cylinder 4 is started. Under the action of the stirring structure of the separation cylinder 4, the humic acid in the decomposition product powder is evenly dissolved into the solution in the tank body 1. Then, dilute hydrochloric acid is added to the tank body 1 to remove impurities in the solution. The separation cylinder 4 is lifted, and the liquid in the separation cylinder 4 flows back into the tank body 1 by gravity. Then, the sealing cover 10 is covered to reduce the air pressure in the tank body 1, and at the same time, the liquid in the tank body 1 is heated to make the liquid in the tank body 1 evaporate quickly, thereby obtaining the solid humic acid product more quickly.

[0101] Example 2

[0102] A humic acid production process using biomass processing (process flow chart as follows Fig.10), including the following steps:

[0103] (1) Use mixed bacterial agents to decompose biomass:

[0104] a1. The biomass to be processed is crushed to a length not exceeding 2 cm. The biomass is a mixture of sawdust and straw in a weight ratio of 1:3. The water content of the biomass crushed material is adjusted to 55%. Urea is added to adjust the carbon-nitrogen ratio of the biomass crushed material to 25:1. Then, a mixed bacterial agent accounting for 2% of the total mass percentage is evenly mixed into the biomass crushed material. The mixed bacterial agent consists of the following components in weight: 10×10 8 cfu / g of Bacillus subtilis agent 15 parts by weight, content of 4×10 8 cfu / g yeast agent 12 weight parts, content of 2×10 8 cfu / g of black mold agent 2 parts by weight, content 2×10 8 cfu / g photosynthetic bacteria agent 10 parts by weight, content 2×10 8 cfu / g of Aspergillus fungus agent 5 parts by weight, content 3×10 8 cfu / g of Gram-positive actinomycete agent 2 parts by weight, content of 10×10 8 5 parts by weight of Bifidobacterium agent with a cfu / g content.

[0105] a2. Choose a hardened and flat ground, sheltered from wind, facing the sun and rain, and pile the mixed biomass fragments into a stack with a trapezoidal cross-section. The initial stack height is 1.8m and the width is 2.5m. During the stacking period, check the temperature of the pile every 12 hours. When the temperature exceeds 60℃, use a compost turner to turn the pile. Add water to the pile in time to maintain the moisture content of the pile at 60%. The stacking time is 60 days.

[0106] a3. Evenly mix acidic or alkaline solution into the pile to adjust the pH value of the pile to between 7 and 8. Cover the pile tightly with plastic film, turn the pile every 5 days with a compost turner, and check the temperature of the pile every 12 hours. When the temperature of the pile stabilizes at 30-35°C, the biomass decomposition is complete. Specifically, when the temperatures obtained from three interval tests are all within the range of 30-35°C, the biomass decomposition is complete.

[0107] a4. Air-dry the decomposed biomass fragments until the moisture content is less than 10%, and further grind the decomposition product into a powder of 50 mesh.

[0108] (2) Dissolution, extraction and precipitation of humic acid products:

[0109] b1. The tank body 1 is filled with 0.5 mol / L potassium hydroxide ethanol solution, and the powdered decomposition product powder is fed into the feed hopper 601, and enters the mixing box 6 through the feed pipe 602 and the auger-type powder conveying assembly inside the feeding pipe; under the operation of the submersible pump 8, the potassium hydroxide ethanol solution in the tank body 1 enters the liquid dispersion pipe 603 through the infusion pipe 9 and the connecting pipe 604, and the driving motor drives the liquid dispersion pipe 603 to rotate, and the potassium hydroxide ethanol solution is thrown out into the mixing box 6 along the opening of the side wall of the liquid dispersion pipe 603, and is evenly mixed with the decomposition product powder; after uniform mixing, it flows out into the separation cylinder 4 along the liquid guide pipe 606 through the bottom end of the liquid baffle plate 605 in the mixing box 6; the solid-liquid ratio of the decomposition product powder to the potassium hydroxide ethanol solution is 1:12, and it is heated by the temperature regulating part, mixed and stirred at 30°C for 8 hours, so that the humic acid contained in the decomposition product powder is dissolved in the potassium hydroxide ethanol solution.

[0110] Add 10% by mass of dilute hydrochloric acid into the tank 1 and mix and stir, adjust the pH value of the mixture to 7±0.5, potassium hydroxide reacts with hydrogen chloride to generate potassium chloride and water. Potassium chloride, as one of the types of potassium fertilizers, can be used as a fertilizer together with humic acid. After adding dilute hydrochloric acid, the alkaline potassium hydroxide is decomposed, which effectively reduces harmful impurities in the final product.

[0111] b2. Lift the separation cylinder 4 to separate the solid matter in the mixed liquid; cover the sealing cover 10, use the vacuum pipe 12 to reduce the air pressure in the tank body 1 to 5kPa, heat the remaining solution to boiling at an air pressure of 5kPa, stop heating after solid precipitation appears in the solution, and continue to slowly reduce the air pressure to 2.5kPa. During the process of reducing the air pressure, use the residual heat of the mixture and the heating components (temperature regulating parts) in the tank body to continue evaporating the liquid in the mixture, which can effectively utilize the residual heat of the heating components in the tank body. When the liquid evaporates, the humic acid product is obtained. If there is still a small amount of liquid after the air pressure is reduced to 2.5kPa, it can be heated again until the liquid in the tank body is completely evaporated; the solid product obtained is the humic acid product.

[0112] b3. Dry and crush the humic acid product, use a granulator to make the powdered humic acid product into 2mm particles, and then seal and package it to store it away from light.

[0113] Example 3

[0114] A humic acid production process using biomass processing comprises the following steps:

[0115] (1) Use mixed bacterial agents to decompose biomass:

[0116] a1. The biomass to be processed is crushed to a length not exceeding 2 cm. The biomass is a mixture of sawdust and straw in a weight ratio of 1:4. The water content of the biomass crushed material is adjusted to 60%. Urea is added to adjust the carbon-nitrogen ratio of the biomass crushed material to 27:1. Then, a mixed bacterial agent accounting for 2.25% of the total mass percentage is evenly mixed into the biomass crushed material. The mixed bacterial agent consists of the following components in parts by weight: 10×10 8 cfu / g of Bacillus subtilis agent 18 parts by weight, content of 3×10 8 cfu / g yeast agent 13 weight parts, content of 2×10 8 cfu / g of black mold agent 2 parts by weight, content 2×10 8 cfu / g photosynthetic bacteria agent 15 weight parts, content 2×10 8 cfu / g of Aspergillus fungus agent 10 weight parts, content of 1×10 8 cfu / g of Gram-positive actinomycete agent 2 parts by weight, content of 10×10 8 6 parts by weight of Bifidobacterium agent with a cfu / g content.

[0117] a2. Choose a hardened and flat ground, sheltered from wind, facing the sun and rain, and pile the mixed biomass fragments into a stack with a trapezoidal cross-section. The initial stack height is 2m and the width is 3m. During the stacking period, check the temperature of the pile every 12 hours. When the temperature exceeds 60℃, use a compost turner to turn the pile. Add water to the pile in time to maintain the moisture content of the pile at 62%. The stacking time is 75 days.

[0118] a3. Evenly mix acidic or alkaline solution into the pile to adjust the pH value of the pile to between 7 and 8. Cover the pile tightly with plastic film, turn the pile every 8 days using a compost turner, and check the temperature of the pile every 12 hours. When the temperature of the pile stabilizes at 30-35°C, the biomass is decomposed. When the temperatures obtained from four interval tests are all within the range of 30-35°C, the biomass is decomposed.

[0119] a4. Air-dry the decomposed biomass fragments until the moisture content is less than 10%, and further grind the decomposition product into 80 mesh powder.

[0120] (2) Dissolution, extraction and precipitation of humic acid products:

[0121] b1. The tank body 1 is filled with 0.5 mol / L potassium hydroxide ethanol solution, and the powdered decomposition product powder is fed into the feed hopper 601, and enters the mixing box 6 through the feed pipe 602 and the auger-type powder conveying assembly inside the feeding pipe 602; under the operation of the submersible pump 8, the potassium hydroxide ethanol solution in the tank body 1 enters the liquid dispersion pipe 603 through the infusion pipe 9 and the connecting pipe 604, and the driving motor drives the liquid dispersion pipe 603 to rotate, and the potassium hydroxide ethanol solution is thrown out into the mixing box 6 along the opening of the side wall of the liquid dispersion pipe 603, and is evenly mixed with the decomposition product powder; after uniform mixing, it flows out into the separation cylinder 4 along the liquid guide pipe 606 through the bottom end of the liquid baffle plate 605 in the mixing box 6; the solid-liquid ratio of the decomposition product powder to the potassium hydroxide ethanol solution is 1:14, and it is heated by the temperature regulating part, mixed and stirred at 32°C for 10 hours, so that the humic acid contained in the decomposition product powder is dissolved in the potassium hydroxide ethanol solution.

[0122] Add 12% by mass of dilute hydrochloric acid into the tank 1 and mix and stir. Adjust the pH value of the mixture to 7±0.5. Potassium hydroxide reacts with hydrogen chloride to generate potassium chloride and water. Potassium chloride, as one of the types of potassium fertilizers, can be used as a fertilizer together with humic acid. After adding dilute hydrochloric acid, the alkaline potassium hydroxide is decomposed, which effectively reduces harmful impurities in the final product.

[0123] b2. Lift the separation cylinder 4 to separate the solid matter in the mixed liquid; cover the sealing cover 10, use the vacuum pipe 12 to reduce the air pressure in the tank body 1 to 7.5 kPa, heat the remaining solution to boiling at a pressure of 7.5 kPa, stop heating after solid precipitation appears in the solution, and continue to slowly reduce the air pressure to 3 kPa. During the process of reducing the air pressure, use the residual heat of the mixture and the heating components (temperature regulating parts) in the tank body to continue evaporating the liquid in the mixture, which can effectively utilize the residual heat of the heating components in the tank body. When the liquid evaporates, the humic acid product is obtained. If there is still a small amount of liquid after the air pressure is reduced to 3 kPa, it can be heated again until the liquid in the tank body is completely evaporated; the solid product obtained is the humic acid product.

[0124] b3. Dry and crush the humic acid product, use a granulator to make the powdered humic acid product into 3mm particles, and then seal and package it to store it away from light.

[0125] Example 4

[0126] A humic acid production process using biomass processing comprises the following steps:

[0127] (1) Use mixed bacterial agents to decompose biomass:

[0128] a1. The biomass to be processed is crushed to a length not exceeding 2 cm. The biomass is a mixture of sawdust and straw in a weight ratio of 1:5. The water content of the biomass crushed material is adjusted to 65%. Urea is added to adjust the carbon-nitrogen ratio of the biomass crushed material to 30:1. Then, a mixed bacterial agent accounting for 2.5% of the total mass percentage is evenly mixed into the biomass crushed material. The mixed bacterial agent consists of the following components in parts by weight: 10×10 8 cfu / g of Bacillus subtilis agent 20 weight parts, content of 3×10 8 cfu / g yeast agent 15 weight parts, content of 2×10 8 cfu / g of black mold agent 5 parts by weight, content 2×10 8 cfu / g photosynthetic bacteria agent 10 parts by weight, content 2×10 8 cfu / g of Aspergillus fungus agent 5 parts by weight, content of 2×10 8 cfu / g of Gram-positive actinomycete agent 2 parts by weight, content of 10×10 8 6 parts by weight of Bifidobacterium agent with a cfu / g content.

[0129] a2. Choose a hardened and flat ground, away from the wind, facing the sun and sheltered from the rain, and pile the mixed biomass fragments into a stack with a trapezoidal cross-section. The initial stack height is 2.2m and the width is 5m. During the stacking period, the temperature of the pile is checked every 12 hours. When the temperature exceeds 60℃, a compost turner can be used to turn the pile. Water is added to the pile in time to maintain the moisture content of the pile at 65%. The stacking time is 90 days.

[0130] a3. Evenly mix acidic or alkaline solution into the pile to adjust the pH value of the pile to between 7 and 8. Cover the pile tightly with plastic film, turn the pile every 10 days with a compost turner, and check the temperature of the pile every 12 hours. When the temperature of the pile stabilizes at 30-35℃, the biomass is decomposed. When the temperatures obtained from five interval tests are all within the range of 30-35℃, the biomass is decomposed.

[0131] a4. The decomposed biomass fragments are air-dried to a moisture content of less than 10%, and the decomposition products are further crushed into a powder of 100 mesh.

[0132] (2) Dissolution, extraction and precipitation of humic acid products:

[0133] b1. The tank body 1 is filled with 0.5 mol / L potassium hydroxide ethanol solution, and the powdered decomposition product powder is fed into the feed hopper 601, and enters the mixing box 6 through the feed pipe 602 and the auger-type powder conveying assembly inside the feeding pipe 602; under the operation of the submersible pump 8, the potassium hydroxide ethanol solution in the tank body 1 enters the liquid dispersion pipe 603 through the infusion pipe 9 and the connecting pipe 604, and the driving motor drives the liquid dispersion pipe 603 to rotate, and the potassium hydroxide ethanol solution is thrown out into the mixing box 6 along the opening of the side wall of the liquid dispersion pipe 603, and is evenly mixed with the decomposition product powder; after uniform mixing, it flows out into the separation cylinder 4 along the liquid guide pipe 606 through the bottom end of the liquid baffle plate 605 in the mixing box 6; the solid-liquid ratio of the decomposition product powder to the potassium hydroxide ethanol solution is 1:16, and it is heated by the temperature regulating part, mixed and stirred at 35°C for 12 hours, so that the humic acid contained in the decomposition product powder is dissolved in the potassium hydroxide ethanol solution.

[0134] Add 15% by mass of dilute hydrochloric acid into the tank 1 and mix and stir. Adjust the pH value of the mixture to 7±0.5. Potassium hydroxide reacts with hydrogen chloride to generate potassium chloride and water. Potassium chloride, as one of the types of potassium fertilizers, can be used as a fertilizer together with humic acid. After adding dilute hydrochloric acid, the alkaline potassium hydroxide is decomposed, which effectively reduces harmful impurities in the final product.

[0135] b2. Lift the separation cylinder 4 to separate the solid matter in the mixed liquid; cover the sealing cover 10, use the vacuum pipe 12 to reduce the air pressure in the tank body 1 to 10kPa, heat the remaining solution to boiling at an air pressure of 10kPa, stop heating after solid precipitation appears in the solution, and continue to slowly reduce the air pressure to 5kPa. During the process of reducing the air pressure, use the residual heat of the mixture and the heating components (temperature regulating parts) in the tank body to continue evaporating the liquid in the mixture, which can effectively utilize the residual heat of the heating components in the tank body. When the liquid evaporates, the humic acid product is obtained. If there is still a small amount of liquid after the air pressure is reduced to 5kPa, it can be heated again until the liquid in the tank body is completely evaporated; the solid product obtained is the humic acid product.

[0136] b3. Dry and crush the humic acid product, use a granulator to make the powdered humic acid product into 4mm particles, and then seal and package it to store it away from light.

[0137] Example 5

[0138] A humic acid production process using biomass processing comprises the following steps:

[0139] (1) Use mixed bacterial agents to decompose biomass:

[0140] a1. The biomass to be processed is crushed to a length not exceeding 2 cm. The biomass is made of rice husk and straw in a mass ratio of 1:1. The water content of the biomass crushed material is adjusted to 65%. Urea is added to adjust the carbon-nitrogen ratio of the biomass crushed material to 30:1. Then, a mixed bacterial agent accounting for 2.5% of the total mass percentage is evenly mixed into the biomass crushed material. The mixed bacterial agent consists of the following components in parts by weight: 10×10 8 cfu / g of Bacillus subtilis agent 20 weight parts, content of 2×10 8 cfu / g yeast agent 15 weight parts, content 1×10 8 cfu / g of black mold agent 5 parts by weight, content 1×10 8 cfu / g photosynthetic bacteria agent 10 parts by weight, content 2×10 8 cfu / g of Aspergillus fungus agent 5 parts by weight, content of 1×10 8 cfu / g of Gram-positive actinomycete agent 2 parts by weight, content of 10×10 8 6 parts by weight of Bifidobacterium agent with a cfu / g content.

[0141] a2. Choose a hardened and flat ground, away from the wind, facing the sun and sheltered from the rain, and pile the mixed biomass fragments into a stack with a trapezoidal cross-section. The initial stack height is 2.2m and the width is 5m. During the stacking period, the temperature of the pile is checked every 12 hours. When the temperature exceeds 60℃, a compost turner can be used to turn the pile. Water is added to the pile in time to maintain the moisture content of the pile at 65%. The stacking time is 90 days.

[0142] a3. Evenly mix acidic or alkaline solution into the pile to adjust the pH value of the pile to between 7 and 8. Cover the pile tightly with plastic film, turn the pile every 10 days with a compost turner, and check the temperature of the pile every 12 hours. When the temperature of the pile stabilizes at 30-35℃, the biomass is decomposed. When the temperatures obtained from five interval tests are all within the range of 30-35℃, the biomass is decomposed.

[0143] a4. The decomposed biomass fragments are air-dried to a moisture content of less than 10%, and the decomposition products are further crushed into a powder of 100 mesh.

[0144] (2) Dissolution, extraction and precipitation of humic acid products:

[0145] b1. The tank body 1 is filled with 0.5 mol / L potassium hydroxide ethanol solution, and the powdered decomposition product powder is fed into the feed hopper 601, and enters the mixing box 6 through the feed pipe 602 and the auger-type powder conveying assembly inside the feeding pipe 602; under the operation of the submersible pump 8, the potassium hydroxide ethanol solution in the tank body 1 enters the liquid dispersion pipe 603 through the infusion pipe 9 and the connecting pipe 604, and the driving motor drives the liquid dispersion pipe 603 to rotate, and the potassium hydroxide ethanol solution is thrown out into the mixing box 6 along the opening of the side wall of the liquid dispersion pipe 603, and is evenly mixed with the decomposition product powder; after uniform mixing, it flows out into the separation cylinder 4 along the liquid guide pipe 606 through the bottom end of the liquid baffle plate 605 in the mixing box 6; the solid-liquid ratio of the decomposition product powder to the potassium hydroxide ethanol solution is 1:16, and it is heated by the temperature regulating part, mixed and stirred at 35°C for 12 hours, so that the humic acid contained in the decomposition product powder is dissolved in the potassium hydroxide ethanol solution.

[0146] Add 15% by mass of dilute hydrochloric acid into the tank 1 and mix and stir. Adjust the pH value of the mixture to 7±0.5. Potassium hydroxide reacts with hydrogen chloride to generate potassium chloride and water. Potassium chloride, as one of the types of potassium fertilizers, can be used as a fertilizer together with humic acid. After adding dilute hydrochloric acid, the alkaline potassium hydroxide is decomposed, which effectively reduces harmful impurities in the final product.

[0147] b2. Lift the separation cylinder 4 to separate the solid matter in the mixed liquid; cover the sealing cover 10, use the vacuum pipe 12 to reduce the air pressure in the tank body 1 to 10kPa, heat the remaining solution to boiling at an air pressure of 10kPa, stop heating after solid precipitation appears in the solution, and continue to slowly reduce the air pressure to 5kPa. During the process of reducing the air pressure, use the residual heat of the mixture and the heating components (temperature regulating parts) in the tank body to continue evaporating the liquid in the mixture, which can effectively utilize the residual heat of the heating components in the tank body. When the liquid evaporates, the humic acid product is obtained. If there is still a small amount of liquid after the air pressure is reduced to 5kPa, it can be heated again until the liquid in the tank body is completely evaporated; the solid product obtained is the humic acid product.

[0148] b3. Dry and crush the humic acid product, use a granulator to make the powdered humic acid product into 4mm particles, and then seal and package it to store it away from light.

[0149] Comparative Example 1

[0150] Humic acid was prepared according to the comparative example method in patent CN108329487A, specifically: 100 kg of rice straw was crushed and the water content was adjusted to 65 wt %, 1 kg of EM bacterial agent was added and mixed, the carbon-nitrogen ratio was adjusted to 25 with urea, and the material was sealed and cultured for 45 days after being fully mixed, and the material was ventilated once every 24 hours and fully turned over, and each ventilation was 20 minutes. During this period, the water content was adjusted to be maintained at 65±5 wt %, and the product after straw decomposition was air-dried, 5 g of solid decomposition product was taken, 25 mL of 0.05 mol / L sodium oxalate and 0.15 mol / L NaOH mixed solution was added, 150 r / min, oscillated at 25° C. for 14 hours, and allowed to stand at 25° C. for 18 hours, and then 5 mL of saturated sodium sulfate solution was added, filtered, and the product obtained after evaporating the filtrate was humic acid.

[0151] Comparative Example 2

[0152] Humic acid was prepared according to the method of Example 7 in patent CN108329487A, specifically: 100 kg of corn stalks were crushed and the moisture content was adjusted to 65 wt %, 1 kg of EM bacterial agent was added and mixed, the carbon-nitrogen ratio was adjusted to 25 with urea, and 1.5 kg of sepiolite powder was added. After fully mixing, the material was sealed and cultured for 45 days, ventilated once every 24 hours and fully turned over, each ventilation was 20 minutes, and the moisture content was adjusted to 65±5 wt % during the period. The product after the straw decomposition was air-dried and completely mixed, 5 g of the solid decomposition product was taken, 25 mL of extractant was added, the concentration of sodium oxalate in the extractant was 0.05 mol / L, the concentration of NaOH was 0.15 mol / L, 200 r / min, oscillated at 25° C. for 9 hours, and allowed to stand at 25° C. for 18 hours, and then 5 mL of saturated sodium sulfate solution was added, filtered, and the product obtained after evaporating the filtrate was humic acid.

[0153] Comparative Example 3

[0154] The method of Example 5 is used to produce humic acid. The only difference from Example 5 is that the bacterial agent used in decomposing biomass is EM bacterial agent instead of the mixed bacterial agent used in Example 5.

[0155] (1) Use EM bacteria to decompose biomass:

[0156] a1. The biomass to be processed is crushed to a length not exceeding 2 cm. The biomass adopts a mass ratio of 1:1 between rice husk and straw. The moisture content of the biomass crushed material is adjusted to 65%. Urea is added to adjust the carbon-nitrogen ratio of the biomass crushed material to 30:1. Then, 2.5% of the EM bacterial agent by mass is evenly mixed into the biomass crushed material.

[0157] a2. Choose a hardened and flat ground, away from the wind, facing the sun and sheltered from the rain, and pile the mixed biomass fragments into a stack with a trapezoidal cross-section. The initial stack height is 2.2m and the width is 5m. During the stacking period, the temperature of the pile is checked every 12 hours. When the temperature exceeds 60℃, a compost turner can be used to turn the pile. Water is added to the pile in time to maintain the moisture content of the pile at 65%. The stacking time is 90 days.

[0158] a3. Evenly mix acidic or alkaline solution into the pile to adjust the pH value of the pile to between 7 and 8. Cover the pile tightly with plastic film, turn the pile every 10 days with a compost turner, and check the temperature of the pile every 12 hours. When the temperature of the pile stabilizes at 30-35℃, the biomass is decomposed. When the temperatures obtained from five interval tests are all within the range of 30-35℃, the biomass is decomposed.

[0159] a4. The decomposed biomass fragments are air-dried to a moisture content of less than 10%, and the decomposition products are further crushed into a powder of 100 mesh.

[0160] (2) Dissolution, extraction and precipitation of humic acid products:

[0161] b1. The tank body 1 is filled with 0.5 mol / L potassium hydroxide ethanol solution, and the powdered decomposition product powder is fed into the feed hopper 601, and enters the mixing box 6 through the feed pipe 602 and the auger-type powder conveying assembly inside the feeding pipe 602; under the operation of the submersible pump 8, the potassium hydroxide ethanol solution in the tank body 1 enters the liquid dispersion pipe 603 through the infusion pipe 9 and the connecting pipe 604, and the driving motor drives the liquid dispersion pipe 603 to rotate, and the potassium hydroxide ethanol solution is thrown out into the mixing box 6 along the opening of the side wall of the liquid dispersion pipe 603, and is evenly mixed with the decomposition product powder; after uniform mixing, it flows out into the separation cylinder 4 along the liquid guide pipe 606 through the bottom end of the liquid baffle plate 605 in the mixing box 6; the solid-liquid ratio of the decomposition product powder to the potassium hydroxide ethanol solution is 1:16, and it is heated by the temperature regulating part, mixed and stirred at 35°C for 12 hours, so that the humic acid contained in the decomposition product powder is dissolved in the potassium hydroxide ethanol solution.

[0162] Add 15% by mass of dilute hydrochloric acid into the tank 1 and mix and stir. Adjust the pH value of the mixture to 7±0.5. Potassium hydroxide reacts with hydrogen chloride to generate potassium chloride and water. Potassium chloride, as one of the types of potassium fertilizers, can be used as a fertilizer together with humic acid. After adding dilute hydrochloric acid, the alkaline potassium hydroxide is decomposed, which effectively reduces harmful impurities in the final product.

[0163] b2. Lift the separation cylinder 4 to separate the solid matter in the mixed liquid; cover the sealing cover 10, use the vacuum pipe 12 to reduce the air pressure in the tank body 1 to 10kPa, heat the remaining solution to boiling at an air pressure of 10kPa, stop heating after solid precipitation appears in the solution, and continue to slowly reduce the air pressure to 5kPa. During the process of reducing the air pressure, use the residual heat of the mixture and the heating components (temperature regulating parts) in the tank body to continue evaporating the liquid in the mixture, which can effectively utilize the residual heat of the heating components in the tank body. When the liquid evaporates, the humic acid product is obtained. If there is still a small amount of liquid after the air pressure is reduced to 5kPa, it can be heated again until the liquid in the tank body is completely evaporated; the solid product obtained is the humic acid product.

[0164] b3. Dry and crush the humic acid product, use a granulator to make the powdered humic acid product into 4mm particles, and then seal and package it to store it away from light.

[0165] Experimental example

[0166] The humic acid prepared in the above embodiments and comparative examples was diluted with ultrapure water at a volume ratio of 1:10, and the carbon content thereof was determined. The humic acid and fulvic acid in the humic acid were separated by acid sedimentation method, and after being diluted with ultrapure water at a volume ratio of 1:10, the carbon content of each was determined and the Humic Acid to Fulvic Acid ratio was calculated. The carbon content of various substances was determined using Jena MultiN / C3100TOC total organic carbon analyzer. The specific results are shown in Table 1.

[0167] Table 1 Properties of humic acid extracts in various examples and comparative examples

[0168]

[0169] As shown in Table 1, by adopting the humic acid production process using biomass processing provided by the present invention, the obtained humic acid carbon content and humic acid carbon content are significantly higher than those of the comparative example, and the humic acid to humic acid ratio is also significantly higher than that of the comparative example.

[0170] The specific embodiments of the present invention are described. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A humic acid production device using biomass processing, characterized in that: include A tank body (1), wherein a separation cylinder (4) is rotatably connected inside the tank body (1), a filter screen is provided on the side wall and the bottom surface of the separation cylinder (4), and a stirring structure is provided on the inner wall and the outer wall of the separation cylinder (4) that are slidably connected to each other; a mixing box (6) is provided on the tank body (1), and the mixing box (6) is directed toward the separation cylinder (4) through a liquid guide tube (606); A temperature regulating portion, arranged on the inner wall of the tank body (1); A liquid dispersion tube (603) is rotatably connected inside the mixing box (6); one end of the liquid dispersion tube (603) is connected to a submersible pump (8) inside the tank body (1) via a connecting tube (604) and a liquid infusion pipeline (9); and the other end is connected to a first driving structure; a plurality of openings are provided on the liquid dispersion tube (603); The mixing box (6) is provided with a spiral feeding structure directed toward the liquid dispersion pipe (603); An arc-shaped liquid baffle plate (605) is provided in the mixing box (6); the top of the liquid guide tube (606) is located in the mixing box (6), and the bottom extends out of the mixing box (6) and faces the tube mouth of the separation tube (4); the top of the liquid guide tube (606) is higher than the bottom of the liquid baffle plate (605), and the liquid level in the mixing box (6) is higher than the top of the liquid guide tube (606) and lower than the bottom of the liquid dispersion tube (603).

2. The humic acid production equipment according to claim 1, characterized in that: The top of the tank body (1) is provided with a circular opening, a cover plate (2) is installed at the opening, the cover plate (2) is rotatably connected to a connecting frame (3), the connecting frame (3) is fixedly connected to a separation cylinder (4), the separation cylinder (4) is coaxial with the tank body (1), and has a diameter smaller than the diameter of the circular opening at the top of the tank body (1), the rotating shaft of the connecting frame (3) passes through the cover plate (2) upwards and is connected to a second driving structure.

3. The humic acid production equipment according to claim 1, characterized in that: A fixed rod (401) inclined obliquely upward is fixedly connected to the inner wall of the separation cylinder (4), and a sliding rod (402) passing through the separation cylinder (4) is connected to slide obliquely downward along the inclined direction of the fixed rod (401); a sliding groove (403) is provided on one side of the fixed rod (401) that is slidably connected to the sliding rod (402), and the top end of the sliding rod (402) is slidably connected in the sliding groove (403).

4. The humic acid production equipment according to claim 1, characterized in that: The temperature adjustment portion comprises a temperature adjustment wall (7), a liquid inlet pipe (701) and a liquid discharge pipe (702); The temperature regulating wall (7) is a hollow structure and is arranged along the inner side surface of the tank body (1); the top ends of the liquid inlet pipe (701) and the liquid discharge pipe (702) respectively extend from the top of the tank body (1), and the bottom ends extend into the interior of the temperature regulating wall (7); the bottom end of the liquid inlet pipe (701) is close to the bottom of the temperature regulating wall (7), and the bottom end of the liquid discharge pipe (702) is close to the top of the temperature regulating wall (7).

5. The humic acid production equipment according to claim 1, characterized in that: A sealing cover (10) is installed on the top of the tank body (1), and a vacuum pipe (12) is also provided on the tank body (1).

6. A humic acid production process using biomass processing, using the humic acid production equipment as described in any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Mixing: Evenly mix the biomass fragments and the mixed bacterial agent; S2, performing aerobic decomposition and anaerobic decomposition in sequence, drying and crushing to obtain decomposition product powder; S3, dissolution and extraction: mixing the decomposition product powder with the potassium hydroxide ethanol solution in the humic acid production equipment, adjusting the pH and separating the solid; S4, evaporation and precipitation: The remaining solution in the production equipment is heated and evaporated to precipitate solids, and the humic acid product is obtained after the liquid is completely evaporated.

7. The humic acid production process according to claim 6, characterized in that: In step S3, the decomposition product powder enters the mixing box (6) through the spiral feeding mechanism, and the potassium hydroxide ethanol solution in the tank body (1) is pumped into the dispersion pipe (603) by the submersible pump (8) through the infusion pipe (9) and the connecting pipe (604). First, under the action of the driving structure, the powder enters the mixing box (6) through the opening on the dispersion pipe (603) to be mixed with the decomposition product powder. After mixing, the powder enters the separation cylinder (4) through the liquid guide tube (606). The second driving structure drives the separation cylinder (4) and the stirring structure to rotate. Under the action of the stirring structure, the powder is again fully mixed and stirred with the potassium hydroxide ethanol solution in the tank body (1), the pH in the tank body (1) is adjusted, and the separation cylinder (4) is lifted to separate the solid product.

8. The humic acid production process according to claim 6, characterized in that: In step S4, after the separation cylinder (4) and the solid product therein are separated, the sealing cover (10) is covered, the air pressure in the tank body (1) is reduced by using the vacuum pipe (12), the remaining solution in the tank body (1) is heated to boiling by the temperature control unit, and the steam generated in the tank body (1) is extracted at the same time. After solids are precipitated in the solution in the tank body (1), the heating is stopped, and the air pressure is continued to be reduced. After the liquid is completely evaporated, the humic acid product is obtained.

9. The humic acid production process according to claim 6, characterized in that: The mixed bacterial agent is composed of the following components in parts by weight: the content is not less than 10×10 8 cfu / g of Bacillus subtilis agent 15-20 weight parts, content not less than 2×10 8 cfu / g yeast agent 12-15 weight parts, content not less than 1×10 8 cfu / g of black mold agent 2-5 weight parts, content not less than 1×10 8 cfu / g photosynthetic bacteria agent 10-15 parts by weight, content not less than 2×10 8 cfu / g of Aspergillus agent 5-10 parts by weight, content not less than 1×10 8 cfu / g of Gram-positive actinomycete agent 2-5 parts by weight, content not less than 10×10 8 cfu / g of Bifidobacterium agent 5-8 weight parts.

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