Plant growth agent production system and production method thereof

Abstract

The application discloses a plant growth agent production system and a production method thereof, and relates to the field of water environment treatment. The production system comprises a modification module and a granulation module. The modification module comprises a modification tank, a plurality of feeding tanks, a liquid collecting tank, a first stirring device, a heating device, a monitoring device and a first spraying device. The first stirring device is arranged at the bottom of the modification tank, and a stirring cutter head is arranged on the first stirring device. The heating device is arranged in the modification tank. The monitoring device comprises a thermometer, a pH meter and a cell concentration monitoring meter arranged in the modification tank, and a panel arranged outside the modification tank. The first spraying device comprises a plurality of first spraying heads arranged in the modification tank and a first material receiving pipe arranged at the top of the modification tank. A recovery pipeline is arranged at the bottom of the modification tank. The granule modification module can modify the granules and uniformly load the microorganisms, and the granulation module can manufacture granules with qualified sizes.

Description

Technical Field

[0001] This invention relates to the field of water environment management technology, specifically to a plant growth regulator production system and its production method. Background Technology

[0002] Currently, the restoration of aquatic plant communities is a crucial aspect of aquatic environment ecological restoration engineering. In engineering practice, the conventional method for constructing aquatic plant communities is artificial planting. However, without appropriate measures after planting, the planted aquatic plant seedlings often exhibit slow growth and low survival rates.

[0003] Although many scientists have dedicated themselves to the research of plant growth-promoting granules, most of this research remains at the laboratory stage (e.g., CN201810034947; CN202210958043). This is mainly because in actual production, the production of plant growth-promoting granules often involves directly adding different materials (mineral raw materials, chemical reagents, or microbial powder) into a disc granulator for mixing and granulation (e.g., patent 201911051145.3). If physicochemical modification of the materials is required, traditional mixers and granulators cannot meet the requirements. Furthermore, mixing mineral raw materials with microbial powder during granulation results in uneven adsorption of the microbial powder by the granules, ultimately leading to suboptimal plant growth promotion. Therefore, traditional granulation methods have certain limitations. How to physicochemically modify mineral materials in a production system and ensure that the granules are uniformly loaded with microorganisms remains a challenging research problem.

[0004] Current practical production systems struggle to physicochemically modify mineral materials and uniformly load microorganisms onto the particle surface. Therefore, there is a need to develop a simple and easy-to-operate plant growth regulator production system and method to improve the uniformity of microbial loading on particles and the stability of granulated particles. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and provide a plant growth agent production system and production method with simple structure and convenient operation, thereby improving the uniformity of microbial loading on particles and the stability of particles after granulation.

[0006] The technical solution of this invention is: a plant growth promoter production system, comprising a modification module for modifying substrate particles and a granulation module for granulating and sieving the modified substrate.

[0007] The modification module includes a modification tank, multiple feeding tanks, a liquid collection tank, a first stirring device, a heating device, a monitoring device, and a first spraying device.

[0008] The first stirring device is located at the bottom of the modification tank for stirring the modified raw materials and is equipped with a stirring blade. The heating device is located inside the modification tank for heating the modified raw materials. The monitoring device includes a thermometer, a pH meter, and a cell concentration monitor located inside the modification tank, and an instrument panel located outside the modification tank. The instrument panel is connected to the thermometer, pH meter, and cell concentration monitor for displaying monitoring results. The first spraying device includes multiple first spray heads located inside the modification tank and a first receiving pipe located at the top of the modification tank. The inner end of the first receiving pipe enters the modification tank and is connected to the pipeline between each spray head, while the outer end of the first receiving pipe extends out of the modification tank and is connected to the pipeline between each feeding tank. A recovery pipe is located at the bottom of the modification tank and is connected to a liquid collection tank. A recovery switch is located on the recovery pipe.

[0009] The granulation module includes a granulator and a screening machine. The screening machine includes a vibrating motor and an upper screen and a lower screen that are connected to the vibrating motor.

[0010] Preferably, there are four feeding tanks, each feeding tank is provided with a feeding conveying pipe at the bottom, and each feeding conveying pipe is provided with a feeding conveying pump and a feeding conveying switch along the flow direction. The feeding conveying pipes of all feeding tanks are combined and lead to the outer end of the first receiving pipe.

[0011] Preferably, the granulator includes a granulation tank, a binder tank, a second stirring device, and a second spraying device. The second stirring device is located at the bottom of the granulation tank for stirring the granulation raw materials. The second spraying device includes a plurality of second spray heads located inside the granulation tank and a second receiving pipe located at the top of the granulation tank. The inner end of the second receiving pipe enters the granulation tank and is connected to the pipeline between each of the second spray heads, while the outer end of the second receiving pipe extends out of the granulation tank and is connected to the pipeline between the binder tank and the granulation tank.

[0012] Furthermore, the bottom of the adhesive tank is provided with an adhesive delivery pipe that is connected to the second receiving pipe, and an adhesive delivery pump and an adhesive delivery switch are provided along the flow direction on the adhesive delivery pipe.

[0013] The present invention also provides a method for producing the above-mentioned plant growth regulator production system, comprising the following steps:

[0014] S1. The matrix particles are put into the modification tank, clean water is poured in to completely soak the matrix particles, the particles are stirred and washed, heated and dried, cooled to room temperature and then crushed into matrix powder.

[0015] S2. Pour NaOH solution into the modification tank until the set solid-liquid ratio is met. After soaking for 2-3 hours, drain the liquid from the tank. Then, pour clean water into the modification tank multiple times to wash the matrix powder until the pH of the liquid in the tank is neutral. Drain the liquid from the tank after each wash.

[0016] S3. Pour FeCl3 solution into the modification tank until the set solid-liquid ratio is met. After soaking for 24-36 hours, drain the liquid from the tank. Then, pour clean water into the modification tank multiple times to wash the matrix powder until the pH of the liquid in the tank is neutral. Drain the liquid from the tank after each wash.

[0017] S4. Heat the modified container to 105-110°C to dry the matrix powder, then heat it to 400-450°C to calcine the matrix powder for 4-5 hours.

[0018] S5. After the temperature inside the modified tank is lowered to 30-35℃, it is kept at that temperature. A mixed bacterial solution containing Bacillus licheniformis and Bacillus subtilis is added until the set solid-liquid ratio is met. The tank is soaked until the total cell concentration inside the tank drops to the set value, at which point the liquid inside the tank is discharged. The modified matrix powder is then dried for 4-5 hours under the heat preservation condition.

[0019] S6. Place the modified matrix powder in the granulation module and granulate it together with the encapsulating agent and binder solution. Then, after sieving, obtain plant growth agent particles with a particle size of 6-10 mm.

[0020] Preferably, step S1 specifically includes:

[0021] The matrix particles are put into the modification tank, and water is supplied to the modification tank through the feeding tank containing clean water to completely soak the matrix particles. The first stirring device is used to stir and clean for 15-20 minutes. Then, the liquid in the tank is discharged through the recovery switch. The temperature inside the tank is raised by the heating device and monitored by the monitoring device. The matrix particles are heated and dried at 90-100℃ for 40-50 minutes. After cooling to room temperature, the matrix particles are crushed into matrix powder by the first stirring device.

[0022] Preferably, step S2 specifically includes:

[0023] A 1-1.5 mol / L NaOH solution is fed into the modification tank through a feeding tank containing NaOH solution until the set solid-liquid ratio of 1:4-5 is met. After soaking for 2-3 hours, the liquid in the tank is discharged through the recovery switch.

[0024] The matrix powder is repeatedly washed by feeding water into the modification tank from a water-filled tank. The pH of the liquid in the tank is monitored by a monitoring device until the pH of the liquid in the tank is neutral. After each washing, the liquid in the tank is discharged through a recycling switch.

[0025] Preferably, step S3 specifically includes:

[0026] FeCl3 solution with a concentration of 1 to 1.5 mol / L is fed into the modification tank through a feeding tank containing FeCl3 solution until the set solid-liquid ratio of 1:4 to 5 is met. After soaking for 24 to 36 hours, the liquid in the tank is discharged through the recovery switch.

[0027] The matrix powder is repeatedly washed by feeding water into the modification tank from a water-filled tank. The pH of the liquid in the tank is monitored by a monitoring device until the pH of the liquid in the tank is neutral. After each washing, the liquid in the tank is discharged through a recycling switch.

[0028] Preferably, step S5 specifically includes:

[0029] The temperature inside the tank is monitored using a monitoring device. After the temperature inside the modification tank is lowered to 30-35°C, it is kept warm by a heating device. A mixed bacterial solution containing Bacillus licheniformis and Bacillus subtilis is then fed into the modification tank through a feeding tank containing the mixed bacterial solution until the set solid-liquid ratio of 1:2-3 is met. The concentration of Bacillus licheniformis in the mixed bacterial solution is 5 × 10⁻⁶. 9 ~6×10 9 CFU / mL, Bacillus subtilis concentration 4.5×10 9 ~5.5×10 9 The total cell concentration in the tank was monitored using a monitoring device, and the tank was soaked until the total cell concentration dropped to the set value of 1.5 × 10⁻⁶ CFU / mL. 9 ~2×10 9 The liquid in the tank was drained at a concentration of CFU / mL, and the mixture was dried under heat preservation conditions for 4–5 hours to obtain the modified matrix powder.

[0030] Preferably, step S6 specifically includes:

[0031] The modified matrix powder is placed in the granulator of the granulation module, and an encapsulating agent and a binder solution are added together for granulation. The encapsulating agent is bentonite, and the mass ratio of the modified matrix powder to the encapsulating agent is 5:1 to 3. The binder solution is a sodium alginate solution with a concentration of 1 to 2 wt%.

[0032] The resulting granules are placed in a screening machine and screened to obtain plant growth agent granules with a particle size of 6-10 mm.

[0033] Preferably, in steps S2-S5, the modification tank is kept stirred by the first stirring device at all times.

[0034] The beneficial effects of this invention are:

[0035] 1. In the production system of the present invention, the first stirring device is equipped with blades, which can not only crush solid particles into powder, but also uniformly stir the material during the subsequent soaking of modifiers and bacterial solutions; the monitoring device includes a thermometer, a pH meter and a cell concentration monitor signal, which can be used to regulate the dosage of different modifiers and the modification time, especially the addition time of the bacterial solution is controlled according to the total cell concentration in the material, so that the microorganisms are fully loaded on the substrate.

[0036] 2. In the production system of the present invention, the particle modification module can modify the matrix particles and uniformly load microorganisms, and dry the modified matrix. The granulation module can produce particles of qualified size and improve the stability and uniformity of the product.

[0037] 3. In the production method of this invention, the addition of NaOH solution serves to remove impurities from the surface of the matrix powder, and the addition of FeCl3 solution serves to increase the effective adsorption sites of the matrix powder, which is beneficial for microorganisms to attach to the matrix surface and enter the matrix interior, thereby improving the adsorption performance. Calcination of the matrix powder at 400–450°C increases the internal pore structure of the matrix powder and increases its internal surface area.

[0038] 4. The addition of a mixed bacterial solution containing Bacillus licheniformis and Bacillus subtilis serves to improve loading efficiency, while soaking at 30–35°C accelerates the loading rate of microorganisms at a suitable temperature. Soaking in the mixed bacterial solution continues until the total cell concentration in the tank drops to a set value. Compared to existing fixed soaking times, this application ensures sufficient microbial loading.

[0039] 5. The production method of this invention regulates the dosage and modification time of different modifiers, solving the problems of difficulty in physicochemical modification of raw materials and uneven microbial adsorption effects in existing granulation technologies. This improves the scientific rigor and accuracy of growth-promoting granule modification, enhancing the plant growth-promoting effect. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the modified module structure of the plant growth regulator production system of the present invention.

[0041] Figure 2 This is a schematic diagram of the granulation module structure of the plant growth regulator production system of the present invention.

[0042] Figure 3 This is a flow chart of the plant growth regulator production process of the present invention.

[0043] Figure 4 Image of the original volcanic rock surface morphology

[0044] Figure 5 The modified matrix morphology images obtained in steps S1-S4 of the embodiment are shown.

[0045] Figure 6 Diagram of microbial morphology on original volcanic rocks.

[0046] Figure 7 The modified matrix morphology images obtained in steps S1-S5 of the embodiment are shown.

[0047] Figure 8 To compare the microbial retention statistics of growth agent particles and growth agent particles prepared in the examples.

[0048] Wherein: 1-Modification tank 2-Feeding tank 3-Liquid collection tank 4-First stirring device (41-Stirring blade) 5-Heating device 6-Monitoring device 7-First spraying device (71-First spray head 72-First receiving pipe) 8-Instrument panel 9-Recovery pipe 10-Recovery switch 11-Feeding conveying pipe 12-Feeding conveying pump 13-Feeding conveying switch 14-Granulation tank 15-Binder tank 16-Second stirring device 17-Second spraying device (171-Second spray head 172-Second receiving pipe) 18-Binder conveying pipe 19-Binder conveying pump 20-Binder conveying switch 21-Vibration motor 22-Upper screen of vibrating screen 23-Lower layer of vibrating screen Detailed Implementation

[0049] The following specific embodiments provide a further detailed description of the present invention. To make the objectives, technical solutions, and advantages of the present invention clearer, the following embodiments provide a further detailed description of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Unless otherwise specified, the pharmaceuticals used in the embodiments are commercially available products, and the methods used are conventional methods in the art.

[0050] like Figure 1-2 As shown, the plant growth promoter production system provided by the present invention includes a modification module for modifying substrate particles and a granulation module for granulating and screening the modified substrate.

[0051] The modification module specifically includes: a modification tank 1, multiple feeding tanks 2, a liquid collection tank 3, a first stirring device 4, a heating device 5, a monitoring device 6, and a first spraying device 7.

[0052] The modification tank 1 is a covered mixing tank. A first stirring device 4 is located at the bottom of the modification tank 1 and is driven by a motor to stir the modified raw materials. The first stirring device 4 is equipped with a stirring blade 41 for crushing the matrix particles. A heating device 5 is located on the inner wall of the modification tank 1 for heating the raw materials inside the tank. The monitoring device 6 includes a thermometer, a pH meter, and a cell concentration monitor located inside the modification tank 1, and an instrument panel 8 located outside the modification tank 1. The instrument panel 8 is connected to the thermometer, pH meter, and cell concentration monitor for displaying the monitoring results. A recovery pipe 9 is located at the bottom of the modification tank 1 and is connected to a liquid collection tank 3. A recovery switch 10 is located on the recovery pipe 9.

[0053] The first spraying device 7 includes a plurality of first spray heads 71 ​​disposed inside the modified tank 1 and a first receiving pipe 72 disposed on the top of the modified tank 1. The inner end of the first receiving pipe 72 enters the modified tank 1 and communicates with the pipes between each of the first spray heads 71, while the outer end of the first receiving pipe 72 extends out of the modified tank 1 and communicates with the pipes between each of the feeding tanks 2. In this embodiment, the first spray heads 71 ​​are disposed at the bottom of the upper cover of the modified tank 1, and the first receiving pipe 72 is disposed through the upper cover of the modified tank 1.

[0054] In this embodiment, there are four feeding tanks 2. Each feeding tank 2 is provided with a feeding conveying pipe 11 at the bottom. Each feeding conveying pipe 11 is provided with a feeding conveying pump 12 and a feeding conveying switch 13 along the flow direction. The feeding conveying pipes 11 of all feeding tanks 2 are connected to the outer end of the first receiving pipe 72. Figure 1 The four feeding tanks 2, from left to right, contain water, NaOH solution, FeCl3 solution, and mixed bacterial solution, respectively. Except for the feeding tank 2 containing water, the other three feeding tanks 2 can be equipped with a stirrer on top to maintain solution homogeneity, depending on requirements. The liquid in the feeding tanks 2 can be transferred to the first spray device 7 of the modification module via the feeding pump 12.

[0055] The granulation module specifically includes a granulator and a screening machine. The granulator includes a granulation tank 14, a binder tank 15, a second stirring device 16, and a second spraying device 17. The granulation tank 14 is a covered stirring tank. The second stirring device 16 is located at the bottom of the granulation tank 14 for stirring the granulation raw materials. The second spraying device 17 includes multiple second spray heads 171 located inside the granulation tank 14 and a second receiving pipe 172 located at the top of the granulation tank 14. The inner end of the second receiving pipe 172 enters the granulation tank 14 and communicates with the pipes between each of the second spray heads 171, while the outer end of the second receiving pipe 172 extends out of the granulation tank 14 and connects with the pipes between the pipes between the pipes of the binder tank 15 and the granulation tank. In this embodiment, the second spray heads 171 are located at the bottom of the cover of the granulation tank 14, and the second receiving pipe 172 passes through the cover of the granulation tank 14. In this embodiment, the granulator also includes a pelletizing chamber, which is conventionally located below the granulation tank 14, for shaping the mixture in the granulation tank 14 into spherical particles.

[0056] The binder tank 15 has a binder delivery pipe 18 at its bottom, which is connected to the second receiving pipe 172. The binder delivery pipe 18 is equipped with a binder delivery pump 19 and a binder delivery switch 20 along the flow direction. The liquid in the binder tank 15 can be transferred to the second spray device 17 of the granulation module through the binder delivery pump 19. The binder tank 15 can be equipped with a stirrer at the top as needed to keep the solution uniform.

[0057] The screening machine includes a vibrating motor 21 and an upper screen 22 and a lower screen 23 connected to the vibrating motor 21. The granules produced by the granulator are poured onto the upper vibrating screen of the screening unit. After screening, granules of unqualified size fall onto the lower screen 23 for recycling. Qualified granules are packaged.

[0058] like Figure 3 As shown, the production method of the above plant growth regulator production system includes the following steps:

[0059] S1. Add 70 kg of matrix particles with a particle size of 1-3 mm (the matrix particles can be one or more of volcanic rock, maifanite, and zeolite; in this example, volcanic rock is used) into modification tank 1, and open the tank. Figure 1 From left to right, the first feeding tank 2 (containing clean water) has a feeding pump 12 and a feeding switch 13. The feeding pump 12 has a flow rate of 50 m³ / h. 3 / h, clean water enters the first receiving pipe 72 through the feeding and conveying pipe 11, and then enters the modified tank 1 through the first spray head 71. When the clean water completely soaks the matrix particles, the feeding and conveying pump 12 and the feeding and conveying switch 13 are turned off. The first stirring device 4 is turned on to stir and clean for 15-20 minutes at a speed of 600 r / min. After cleaning, the first stirring device 4 is turned off, and the recovery switch 10 is turned on to discharge the liquid in the tank to the liquid collection tank 3. After the liquid recovery is completed, the recovery switch 10 is turned off.

[0060] The heating device 5 is turned on to raise the temperature inside the tank and the monitoring device 6 is used to monitor the temperature inside the tank. The temperature inside the tank is displayed on the instrument panel 8. The matrix particles are heated and dried at 100°C for 40 minutes. During drying, the first stirring device 4 is turned on and stirred at a speed of 300 r / min. The heating device 5 is turned off and the matrix particles are cooled to room temperature of 25°C. The speed of the first stirring device 4 is adjusted to 2400 r / min. The high-speed rotating stirring head 41 cuts, impacts, and rubs the volcanic rock. After 5 minutes, the matrix particles are crushed into matrix powder.

[0061] S2, Open Figure 1 The second feed tank from the left (2, containing 1 mol / L NaOH solution) has a feed pump 12 and a feed switch 13. The flow rate of the feed pump 12 is 50 m³ / h. 3 / h, after the solid-liquid ratio in the tank meets 1:5 (in this embodiment, the solid-liquid ratio is the mass ratio), the feeding pump 12 and the feeding switch 13 are turned off. The NaOH solution enters the first receiving pipe 72 through the feeding pipe 11, and then enters the modified tank 1 through the first spray head 71. It is soaked at room temperature of 25°C for 2 hours. The recovery switch 10 is turned on to discharge the liquid in the tank to the liquid collection tank 3. The recovery switch 10 is equipped with an anti-clogging device. After the liquid recovery is completed, the recovery switch 10 is turned off.

[0062] operate Figure 1 The first feeding tank 2 (containing clean water) from the left in the middle has a feeding pump 12 and a feeding switch 13. The pump 12 and the switch 13 deliver clean water to the modification tank 1 multiple times to clean the matrix powder. The pH of the liquid in the tank is monitored by the monitoring device 6 and displayed on the instrument panel 8 until the pH of the liquid in the tank is neutral (in this embodiment, the pH of the liquid in the tank is controlled at 6.5 to 7.5). After each cleaning, the recovery switch 10 is turned on to discharge the liquid in the tank and then the recovery switch 10 is turned off.

[0063] S3, Open Figure 1 The third feed tank from the left, 2 (containing a 1 mol / L FeCl3 solution), has a feed pump 12 and a feed switch 13. The flow rate of the feed pump 12 is 50 m³ / h. 3 / h, after the solid-liquid ratio in the tank meets 1:4, the feeding pump 12 and the feeding switch 13 are turned off. The FeCl3 solution enters the first receiving pipe 72 through the feeding pipe 11, and then enters the interior of the modification tank 1 through the first spray head 71. It is soaked at room temperature of 25°C for 24 hours. Then the recovery switch 10 is turned on to discharge the liquid in the tank to the liquid collection tank 3. After the liquid recovery is completed, the recovery switch 10 is turned off.

[0064] operate Figure 1 The first feeding tank 2 (containing clean water) from the left in the middle has a feeding pump 12 and a feeding switch 13. The pump 12 and the switch 13 deliver clean water to the modification tank 1 multiple times to clean the matrix powder. The pH of the liquid in the tank is monitored by the monitoring device 6 and displayed on the instrument panel 8 until the pH of the liquid in the tank is neutral (in this embodiment, the pH of the liquid in the tank is controlled at 6.5 to 7.5). After each cleaning, the recovery switch 10 is turned on to discharge the liquid in the tank and then the recovery switch 10 is turned off.

[0065] S4. Turn on the heating device 5 to raise the temperature inside the tank and use the monitoring device 6 to monitor the temperature inside the tank. The temperature inside the tank is displayed on the instrument panel 8. Heat the modified tank 1 to 105°C to dry the matrix powder for 4 hours. Then heat it to 400°C to calcine the matrix powder for 4 hours. After calcineation is completed, turn off the heating device 5.

[0066] S5. Monitor the temperature inside the tank using monitoring device 6. After the temperature inside the modified tank 1 drops to 30°C, it is kept warm by heating device 5. Open... Figure 1 The rightmost feeding tank 2 (containing a mixed bacterial solution of Bacillus licheniformis and Bacillus subtilis) has a feeding pump 12 and a feeding switch 13. The flow rate of the feeding pump 12 is 50 m³ / s. 3 / h, after the solid-liquid ratio in the tank reaches 1:3, turn off the feeding pump 12 and the feeding switch 13. The mixed bacterial solution is a mixed fermentation solution of Bacillus licheniformis and Bacillus subtilis, and the concentration of Bacillus licheniformis in the mixed bacterial solution is 5×10 9CFU / mL, Bacillus subtilis concentration 4.5×10 9 CFU / mL, the mixture was kept stirred by the first stirring device 4 during the soaking process, and the total cell concentration in the tank was monitored by the monitoring device 6 until the total cell concentration in the tank dropped to the set value of 2×10. 9 Stop stirring when the concentration reaches CFU / mL, open the recovery switch 10 to discharge the liquid into the liquid collection tank 3, and close the recovery switch 10 after the liquid recovery is complete. Continue drying at 30℃ for 4 hours to obtain the modified matrix powder, and then turn off the heating device 5.

[0067] In steps S2-S5 above, the first stirring device 4 maintains stirring at a speed of 300 r / min.

[0068] S6. Transfer the dried modified matrix powder to the granulation tank 14. Transfer can be achieved manually by pouring or by using a material screw pump installed between the modified tank 1 and the granulation tank 14. Add an encapsulating agent (bentonite powder) to the granulation tank 14, wherein the mass ratio of the modified matrix powder to the encapsulating agent is 5:1 to 3. Turn on the second stirring device 16 to mix the modified matrix powder and the encapsulating agent evenly. Turn on the binder delivery pump 19 and binder delivery switch 20 of the binder tank 15 (containing binder solution; in this embodiment, the binder solution is a 1 wt% sodium alginate solution) to add the binder solution to the granulation tank 14 in batches. The flow rate of the binder delivery pump 19 is 30 m³ / s. 3 / h, the amount of binder solution is calculated as 0.5 times the mass of modified matrix powder, and the granulator makes the material in the granulation tank 14 into granules.

[0069] After granulation, the particles are transferred to the upper screen 22 of the vibrating screen in the screening machine. Under the action of the vibrating motor 25, particles with a diameter less than 5mm are vibrated to the lower screen 23. Unqualified particles from the lower screen are added back into the granulation module for regranulation. Qualified particles from the upper screen are vacuum-packed into bags.

[0070] The entire process produces 50-60 kg of qualified granules with a particle size of 6-10 mm. Multiple sets of modification modules can be used at intervals, which can shorten the time required for batch production of accelerated granules.

[0071] Performance testing

[0072] (1) Electron microscopy of volcanic rocks

[0073] Electron microscopy was performed on the original volcanic rock and the calcined volcanic rock obtained by the above process steps S1-S4.

[0074] Experimental conditions: The morphological changes of the original volcanic rocks and modified volcanic rocks were detected by energy dispersive spectroscopy (EDS) in conjunction with field emission scanning electron microscopy.

[0075] Test results: such as Figure 4-5 As shown, Figure 4 The original volcanic rocks in the middle have a relatively smooth surface and are hill-shaped, with some folded areas, and a few rough granular protrusions and porous structures on the surface. Figure 5 The modified volcanic rock of this invention shows that the surface roughness and specific surface area of ​​the modified volcanic rock are significantly improved, most areas are uneven, and the folded areas are greatly increased.

[0076] (2) Electron microscopy of volcanic rock bacterial solution immersion scan

[0077] The original volcanic rocks were subjected to loading in steps S1 and S5 of this application, and the volcanic rocks obtained by soaking in bacterial solution after being treated in steps S1-S5 of the above process were subjected to electron microscopy scanning tests.

[0078] Experimental conditions: The morphological changes of natural volcanic rocks and modified volcanic rocks were detected by energy dispersive spectroscopy (EDS) in conjunction with field emission scanning electron microscopy.

[0079] Test results: such as Figure 6-7 As shown, after modification, the surface roughness of the volcanic rock of the present invention is increased, and the microorganisms adsorbed on the surface of the volcanic rock are more dense than those on the unmodified volcanic rock, indicating that the adsorption capacity of the modified volcanic rock for cells is greatly enhanced.

[0080] (3) Stability of growth agent

[0081] Using the original volcanic rock as a reference, the growth particles obtained in the examples were directly subjected to a preservation test. The growth agent particles obtained in the examples were prepared by simply going through steps S1, S5 and S6 of this application.

[0082] Experimental conditions: The stability of different prepared particles was monitored under storage conditions of 4℃. Each month, a portion of the sample was taken out and soaked for 24 hours. After soaking, bacterial counts were monitored to analyze the effective bacterial count.

[0083] Test results: such as Figure 8 As shown, under storage conditions of 4℃, the modified growth agent can be stably stored for more than 6 months, which is significantly better than the unmodified group.

Claims

1. A method for producing a plant growth regulator, characterized in that, The production method employs a plant growth regulator production system, which includes a modification module for modifying substrate particles and a granulation module for granulating and screening the modified substrate. The modification module includes a modification tank (1), multiple feeding tanks (2), a liquid collection tank (3), a first stirring device (4), a heating device (5), a monitoring device (6), and a first spraying device (7). The first stirring device (4) is located at the bottom of the modification tank (1) for stirring the modified raw materials, and the first stirring device (4) is equipped with a stirring blade (41); the heating device (5) is located inside the modification tank (1) for heating the modified raw materials; the monitoring device (6) includes a thermometer, a pH meter, and a cell concentration monitor located inside the modification tank (1) and an instrument panel (8) located outside the modification tank (1), the instrument panel (8) being connected to the thermometer, pH meter, and cell concentration monitor for displaying the monitoring results; the first The spraying device (7) includes a plurality of first spray heads (71) disposed in the modified tank (1) and a first receiving pipe (72) disposed on the top of the modified tank (1). The inner end of the first receiving pipe (72) enters the modified tank (1) and is connected to the pipeline between each first spray head (71), and the outer end of the first receiving pipe (72) extends out of the modified tank (1) and is connected to the pipeline between each feeding tank (2). The bottom of the modified tank (1) is provided with a recovery pipe (9) connected to a liquid collection tank (3), and a recovery switch (10) is provided on the recovery pipe (9). The granulation module includes a granulator and a screening machine. The screening machine includes a vibrating motor (21) and an upper screen (22) and a lower screen (23) that are connected to the vibrating motor (21) for transmission. The production method includes the following steps: S1. The matrix particles are put into the modification tank (1). The matrix particles are completely soaked by feeding water into the modification tank (1) through the feeding tank (2) containing clean water. The particles are stirred and cleaned for 15~20 minutes by the first stirring device (4). The liquid in the tank is discharged through the recovery switch (10). The temperature in the tank is raised by the heating device (5) and the temperature in the tank is monitored by the monitoring device (6). The matrix particles are heated and dried at 90~100℃ for 40~50 minutes. After cooling to room temperature, the matrix particles are crushed into matrix powder by the first stirring device (4). S2. A NaOH solution with a concentration of 1~1.5mol / L is fed into the modification tank (1) through the feeding tank (2) containing NaOH solution until the set solid-liquid ratio of 1:4~5 is met. After soaking for 2~3 hours, the liquid in the tank is discharged through the recovery switch (10). The matrix powder is washed by feeding the modification tank (1) with clean water through the feeding tank (2) containing clean water. The pH of the liquid in the tank is monitored by the monitoring device (6) until the pH of the liquid in the tank is neutral. The liquid in the tank is discharged through the recovery switch (10) after each washing. S3. FeCl3 solution with a concentration of 1~1.5mol / L is fed into the modification tank (1) through the feeding tank (2) containing FeCl3 solution until the set solid-liquid ratio of 1:4~5 is met. After soaking for 24~36h, the liquid in the tank is discharged through the recovery switch (10). The matrix powder is washed by feeding the modification tank (1) with clean water through the feeding tank (2) containing clean water. The pH of the liquid in the tank is monitored by the monitoring device (6) until the pH of the liquid in the tank is neutral. The liquid in the tank is discharged through the recovery switch (10) after each washing. S4. Heat the modified tank (1) to 105~110℃ to dry the matrix powder, and then heat it to 400~450℃ to calcine the matrix powder for 4~5 hours. S5. The temperature inside the tank is monitored using the monitoring device (6). After the temperature inside the modification tank (1) drops to 30~35℃, it is kept warm by the heating device (5). A mixed bacterial solution containing Bacillus licheniformis and Bacillus subtilis is supplied to the modification tank (1) through the feeding tank (2) containing the mixed bacterial solution until the set solid-liquid ratio of 1:2~3 is met. The concentration of Bacillus licheniformis in the mixed bacterial solution is 5×10⁻⁶. 9 ~6×10 9 CFU / mL, Bacillus subtilis concentration 4.5×10 9 ~5.5×10 9 The total cell concentration in the tank was monitored using a monitoring device (6) at CFU / mL until it dropped to the set value of 1.5 × 10⁻⁶. 9 ~2×10 9 The liquid in the tank was drained when the concentration of CFU / mL was reached; the modified matrix powder was dried under heat preservation conditions for 4-5 hours. S6. Place the modified matrix powder in the granulation module and granulate it together with the encapsulating agent and binder solution. Then, after sieving, obtain plant growth agent particles with a particle size of 6~10mm.

2. The method for producing the plant growth regulator as described in claim 1, characterized in that, There are four feeding tanks (2). Each feeding tank (2) has a feeding conveying pipe (11) at the bottom and a feeding conveying pump (12) and a feeding conveying switch (13) along the flow direction on each feeding conveying pipe (11). The feeding conveying pipes (11) of all feeding tanks (2) are connected to the outer end of the first receiving pipe (72).

3. The method for producing the plant growth regulator as described in claim 1, characterized in that, The granulator includes a granulation tank (14), a binder tank (15), a second stirring device (16), and a second spraying device (17). The second stirring device (16) is located at the bottom of the granulation tank (14) for stirring the granulation raw materials. The second spraying device (17) includes a plurality of second spray heads (171) located in the granulation tank (14) and a second receiving pipe (172) located at the top of the granulation tank (14). The inner end of the second receiving pipe (172) enters the granulation tank (14) and is connected to the pipe between each second spray head (171), and the outer end of the second receiving pipe (172) extends out of the granulation tank (14) and is connected to the pipe between the binder tank (15).

4. The method for producing the plant growth regulator as described in claim 3, characterized in that, The adhesive tank (15) has an adhesive delivery pipe (18) at the bottom that is connected to the outer end of the second receiving pipe (172). The adhesive delivery pipe (18) is equipped with an adhesive delivery pump (19) and an adhesive delivery switch (20) along the flow direction.

5. The method for producing the plant growth regulator as described in claim 1, characterized in that, Step S6 specifically includes: The modified matrix powder is placed in the granulator of the granulation module, and an encapsulating agent and a binder solution are added together for granulation. The encapsulating agent is bentonite, and the mass ratio of modified matrix powder to encapsulating agent is 5:1~3. The binder solution is a sodium alginate solution with a concentration of 1~2wt%. The resulting granules are placed in a screening machine and screened to obtain plant growth agent granules with a particle size of 6-10 mm.

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