Full-automatic ecological microbial agent coated saline-alkali soil improvement solid material device and application method

Abstract

The invention discloses a full-automatic ecological microbial agent coated saline-alkali soil improvement solid material device and an application method, and relates to the technical field of saline-alkali soil improvement devices.The full-automatic ecological microbial agent coated saline-alkali soil improvement solid material device comprises a PLC, a coating pan and a pressure reduction fluidizer, a discharging valve is arranged on the coating pan, and a material collector is placed below the discharging valve; the material collector is communicated with the decompression fluidizer through a material conveying pipeline, a feeding valve is mounted on the material conveying pipeline, and the interior of the coating pan is respectively communicated with the slurry drying unit and the slurry spraying unit; the upper portion of the pressure reduction fluidizer is communicated with the dust removal unit, the lower portion of the pressure reduction fluidizer is communicated with the fluidization drying unit, and a pressure reduction fluidizer discharge port is formed in the side wall of the bottom of the pressure reduction fluidizer. And the PLC controller is electrically connected with an execution component. According to the full-automatic device for coating the saline-alkali soil improvement solid material with the ecological microbial agent and the application method, the design process is simple, large-scale production is easy, and the production efficiency of the saline-alkali soil improvement solid material coated with the ecological microbial agent and the activity of the ecological microbial agent are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of saline-alkali land improvement material production device, and in particular to a full-automatic ecological bacterial agent coating saline-alkali land improvement solid material device and an application method. Background Art

[0002] Biological agents mainly refer to the use of microorganisms and their metabolites to improve soil, promote crop growth, increase crop yields, and prevent and control diseases and insect pests. As a green and sustainable alternative to biological pesticides and fertilizers, microbial agents have broad application prospects. There are many types of microbial agent products, including nitrogen-fixing bacteria, phosphate-solubilizing bacteria, antagonistic bacteria, growth-promoting bacteria, etc., which help the green development of agriculture by improving the soil microbial environment, enhancing crop resistance, and improving nutrient utilization. In addition, microbial agents also play an important role in the environmental protection of microbial soil remediation of soil acidity, compaction, and salinization.

[0003] In view of the characteristics of saline-alkali land, when using saline-alkali land improvement solid materials for saline-alkali land treatment, ecological microbial agents are applied. The two promote each other to improve the treatment effect of saline-alkali land. The effect of microbial agents improves the stress resistance of crops in saline-alkali land, promotes the growth of crops, and increases crop yields. At the same time, it saves the number of applications and reduces the cost of application, which helps to save the cost of saline-alkali land treatment and agricultural production.

[0004] Based on the above reasons, the present invention describes a fully automatic device for coating saline-alkali land with ecological bacteria agents to improve solid materials and its application.

[0005] In the prior art, the invention patent CN108514516A published on September 11, 2018, introduces a coating pan for tablet coating, which mainly includes a coating pan and a transmission system. The device is a traditional coating equipment whose coating pan is installed at an angle, the material loading is limited, the batch output is small, and the manual addition amount of the spraying is difficult to control, resulting in uneven coating and easy adhesion of solid materials. The air supply drying device does not perform atomization dispersion, resulting in the inactivation of temperature-sensitive materials.

[0006] In the prior art, invention patent CN105020981 published on November 4, 2015, introduces a fluidized drying device for material particles (a horizontal fluidized dryer). The main advantages are simple structure, low energy consumption, and easy operation, but the material in the device has a long fluidization time in a small fluidized unit, the degree of automation is not high, and it is difficult to scale up production.

[0007] How to develop a fully automatic device and application method for coating solid materials for saline-alkali land with ecological bacteria agents, realize fully automated production, and improve the production efficiency of solid materials for saline-alkali land with ecological bacteria agents and the activity of ecological bacteria agents has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0008] The purpose of the present invention is to provide a fully automatic ecological bacterial agent coating saline-alkali land improvement solid material device and application method to solve the problems listed in the background technology.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0010] The fully automatic ecological microbial agent coating device for improving saline-alkali land solid materials of the present invention comprises a PLC controller, a coating pot and a decompression fluidizer, wherein the coating pot is provided with a discharge valve, a material collector is placed below the discharge valve, the material collector is connected with the decompression fluidizer through a feed pipe, a feed valve is installed on the feed pipe, the interior of the coating pot is respectively connected with a slurry drying unit and a spraying unit, and the exterior of the coating pot is engaged with a coating pot driving motor;

[0011] The upper part of the decompression fluidizer is connected to the dust removal unit, the lower part of the decompression fluidizer is connected to the fluidized drying unit, and a decompression fluidizer discharge port is provided on the bottom side wall of the decompression fluidizer;

[0012] The PLC controller is electrically connected to the slurry drying unit, the spraying unit, the dust removal unit, the fluidized drying unit, and the coating pan driving motor.

[0013] Preferably, the slurry drying unit comprises a heating fan and a second heater, the air outlet of the heating fan is connected to one end of a hot air duct, and a hot air nozzle is installed at the other end of the hot air duct;

[0014] The hot air nozzle is located at the bottom of the inner wall of the coating pan;

[0015] The second heater is installed on the hot air duct near the heating fan, and a hot air temperature sensor is installed on the hot air duct near the hot air nozzle; the heating fan and the hot air temperature sensor are both electrically connected to the PLC controller.

[0016] Preferably, the spraying unit comprises a spraying machine, the spraying machine has a slurry outlet connected to one end of a spraying pipe, the other end of the spraying pipe is provided with an atomizing nozzle, and the atomizing nozzle is installed on the top of the inner wall of the coating pan;

[0017] The shotcrete machine is electrically connected to the PLC controller.

[0018] Preferably, the dust removal unit comprises a negative pressure fan and a cyclone separator, the inlet of the cyclone separator is connected to the top of the pressure reducing fluidizer, and the outlet of the cyclone separator is connected to the air inlet end of the negative pressure fan;

[0019] The negative pressure fan is electrically connected to the PLC controller.

[0020] Preferably, the fluidized drying unit comprises an air intake fan and a first heater, the air outlet of the air intake fan is connected to one end of a drying duct, and the other end of the drying duct is connected to the bottom of the pressure reducing fluidizer;

[0021] The first heater is installed on the drying duct, and a pressure-reducing fluidizer inlet air temperature sensor is installed on the drying duct between the first heater and the pressure-reducing fluidizer;

[0022] The air intake fan and the air intake temperature sensor of the pressure reducing fluidizer are both electrically connected to the PLC controller.

[0023] Preferably, it further comprises a pressure gauge and a pressure probe, wherein the pressure gauge and the pressure probe are both installed on the side wall of the pressure reducing fluidizer.

[0024] Preferably, the PLC controller has a built-in industrial-grade computer and multiple temperature and pressure control units, and an external touch-screen display. Its control software can perform parameter setting and program editing, so as to realize automatic control of temperature, pressure and speed parameters and automatic program operation.

[0025] The application method of the fully automatic ecological bacterial agent coating saline-alkali land improvement solid material device comprises the following steps:

[0026] S1. Add the prepared slurry containing ecological bacteria agent and adhesive into the spraying machine, add the saline-alkali land improvement solid material into the coating pot, and turn on the heating fan and PLC controller;

[0027] S2, by setting the operating parameters of the coating pot and the spraying machine on the panel of the PLC controller and running them in sequence, the solid materials for improving the saline-alkali land are coated with the ecological microbial agent, and when the spraying is completed, the spraying machine is turned off, the heating fan and the second heater are turned on and the corresponding wind speed and temperature parameters are set, and the ecological microbial agent is preliminarily dried while the coating pot is kept running to reduce the adhesion between the ecological microbial agent and the solid materials for improving the saline-alkali land;

[0028] S3. When the bonding rate of the saline-alkali land improvement solid material coated with the ecological bacteria agent is lower than 15%, the heating fan stops supplying air, the unloading valve and the negative pressure fan are opened synchronously, and the negative pressure fan is set to an appropriate speed. When the pressure in the reduced pressure fluidized bed reaches -0.05Mpa, the feed valve is opened to transfer the coated ecological bacteria agent saline-alkali land improvement solid material into the reduced pressure fluidizer cavity through the negative pressure device;

[0029] S4, after all the ecological bacteria agent coated saline-alkali land improvement solid materials have been transported, close the feed valve, turn on the air intake fan of the pressure-reducing fluidizer, turn on the first heater and set the heating temperature, adjust the ratio of air intake to air outlet, so that the ecological bacteria agent coated saline-alkali land improvement solid materials in the drying chamber are in a fluidized state, and keep the pressure in the cavity within 0.01-0.03Mpa while maintaining a good fluidized state, so as to achieve the purpose of quickly drying the ecological bacteria agent coated saline-alkali land improvement solid materials;

[0030] S5. After drying is completed, the speed of the negative pressure fan is reduced to keep the pressure in the pressure reducing fluidizer chamber between 0.01-0.02Mpa, the first heater is turned off, the air intake wind speed of the air intake fan is adjusted to keep the bacterial agent particles in a fluidized state, and the saline-alkali land improvement solid material coated with the ecological bacterial agent is discharged through the discharge port of the pressure reducing fluidizer.

[0031] Compared with the prior art, the beneficial technical effects of the present invention are:

[0032] 1) The present invention has a simple structure, convenient operation, high degree of automation, and is easy to realize industrial scale-up;

[0033] 2) The present invention adopts a unique coating pan placed horizontally, which increases the single batch processing capacity and improves the coating efficiency;

[0034] 3) The present invention adopts a porous spray and atomized air drying design to make the coating of the saline-alkali land improvement solid material more uniform, and quickly evaporates the excess water on the surface of the saline-alkali land improvement solid material, reducing the adhesion rate between the particles of the saline-alkali land improvement solid material coated with ecological bacteria, and improving the qualified rate of finished products;

[0035] 4) The present invention adopts negative pressure feeding method, simplifies the complicated manual feeding method, realizes seamless connection between coating and fluidized drying, and improves production efficiency;

[0036] 5) The vacuum fluidization section of the present invention adopts a vacuum fluidization design, which can quickly dry the saline-alkali land improvement solid material coated with the ecological bacteria agent at a relatively low temperature, thereby ensuring the activity of the ecological bacteria agent to the maximum extent. At the same time, the bonding rate of the saline-alkali land improvement solid material coated with the ecological bacteria in the fluidized state is further reduced, thereby improving product quality and production efficiency;

[0037] 6) The unique design of the negative pressure fan with fluidized drying function and the adjustable wind speed of the air intake fan makes the feeding and discharging of materials automatic, facilitates production operation, improves production efficiency, and facilitates subsequent production expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] Figure 1 This is a schematic diagram of the fully automatic ecological bacterial agent coating solid material device for improving saline-alkali land of the present invention.

[0040] Description of the drawings: 1. PLC controller; 2. Coating pot; 3. Pressure reducing fluidizer; 4. Heating fan; 5. Spraying machine; 6. Inlet fan; 7. Negative pressure fan; 8. Discharge port of pressure reducing fluidizer; 9. Cyclone separator; 10. Pressure gauge; 11. Coating pot drive motor; 12. First heater; 13. Second heater; 14. Feed valve; 15. Material collector; 16. Hot air temperature sensor; 17. Pressure reducing fluidizer inlet temperature sensor; 18. Pressure probe; 19. Hot air nozzle; 20. Atomizing nozzle; 21. Discharge valve. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] like Figure 1 As shown, a fully automatic ecological microbial agent coated saline-alkali land improvement solid material device comprises a PLC controller 1, a coating pot 2 and a decompression fluidizer 3, wherein a discharge valve 21 is arranged on the coating pot 2, a material collector 15 is placed below the discharge valve 21, the material collector 15 is communicated with the decompression fluidizer 3 through a feed pipe, a feed valve 14 is installed on the feed pipe, the interior of the coating pot 2 is communicated with a slurry drying unit and a spraying unit respectively, the coating pot 2 is placed horizontally, an external coating pot driving motor 11 drives the coating pot 2 to rotate through gears, and compared with a traditional coating pot, the coating pot placed horizontally has a larger batch processing capacity, and the coating pot driving motor 11 is connected to the PLC controller 1, so as to realize automatic control of the rotation speed of the coating pot;

[0043] The upper part of the decompression fluidizer 3 is connected to the dust removal unit, and the lower part of the decompression fluidizer 3 is connected to the fluidized drying unit. A decompression fluidizer discharge port 8 is provided on the bottom side wall of the decompression fluidizer 3; the speed of the air intake fan 6 is adjusted by the PLC controller 1 to maintain the fluidization state of the alkaline land improved solid material coated with ecological bacteria, the speed of the negative pressure fan 7 is reduced and the micro-positive pressure state in the cavity is maintained, and the decompression fluidizer discharge port 8 is opened to realize automatic discharge in the fluidized state of the material;

[0044] The PLC controller 1 is electrically connected to the slurry drying unit, the spraying unit, the dust removal unit, the fluidized drying unit, and the coating pan driving motor 11 .

[0045] Specifically, the slurry drying unit includes a heating fan 4 and a second heater 13, the air outlet of the heating fan 4 is connected to one end of the hot air duct, the heating fan 4 can be moved, and the distance of the hot air duct entering the coating pot 2 can be adjusted as needed. The other end of the hot air duct is equipped with a plurality of downward hot air nozzles 19, and the hot air nozzles 19 are located at the bottom of the inner wall of the coating pot 2, which can evenly heat and blow the coated saline-alkali land improvement solid material;

[0046] The second heater 13 is installed on the hot air duct near the heating fan 4, and a hot air temperature sensor 16 is installed on the hot air duct near the hot air nozzle 19; the heating fan 4 and the hot air temperature sensor 16 are both electrically connected to the PLC controller 1 to achieve automatic control of the air supply rate and air supply temperature.

[0047] Specifically, the spraying unit includes a spraying machine 5, the slurry outlet of the spraying machine 5 is connected to one end of the spraying pipeline, the spraying machine 5 can be moved, so that the distance of the spraying pipeline entering the coating pot 2 can be adjusted according to the spraying needs, and the other end of the spraying pipeline is equipped with a plurality of downward atomizing nozzles 20, and the atomizing nozzles 20 are installed on the top of the inner wall of the coating pot 2, which can evenly spray the ecological bacterial liquid on the surface of the saline-alkali land improved solid material;

[0048] The spraying machine 5 is electrically connected to the PLC controller 1 to achieve automatic control of the spraying rate.

[0049] Specifically, the dust removal unit includes a negative pressure fan 7 and a cyclone separator 9, the inlet of the cyclone separator 9 is connected to the top of the pressure reducing fluidizer 3, and the outlet of the cyclone separator 9 is connected to the air inlet end of the negative pressure fan 7. The negative pressure fan 7 can form a negative pressure in the cavity of the pressure reducing fluidizer 3 to realize the automatic feeding of the ecological bacteria coated saline-alkali land improvement solid material;

[0050] The cyclone separator 9 can collect small particles of ecological bacteria-coated alkaline land improvement solid materials and dust that escape during reduced pressure fluidized drying, and separate the solids at the air outlet through the cyclone centrifugal principle, which is beneficial to the recovery of ecological bacteria-coated alkaline land improvement solid materials and the reduction of environmental pollution;

[0051] The negative pressure fan 7 is electrically connected to the PLC controller 1, and the negative pressure state in the cavity of the pressure reducing fluidizer 3 is achieved by adjusting the rotation speed of the negative pressure fan 7 through the PLC controller 1;

[0052] The fluidized drying unit includes an air intake fan 6 and a first heater 12, the air outlet of the air intake fan 6 is connected to one end of a drying duct, and the other end of the drying duct is connected to the bottom of the decompression fluidizer 3;

[0053] The first heater 12 is installed on the drying duct, and a pressure-reducing fluidizer inlet air temperature sensor 17 is installed on the drying duct between the first heater 12 and the pressure-reducing fluidizer 3;

[0054] The air intake fan 6 and the pressure reducing fluidizer air intake temperature sensor 17 are electrically connected to the PLC controller 1, and also include a pressure gauge 10 and a pressure probe 18, and the pressure gauge 10 and the pressure probe 18 are both installed on the side wall of the pressure reducing fluidizer 3;

[0055] The first heater 12 is controlled by the PLC controller 1 to heat the intake air. The intake air temperature value detected by the reduced pressure fluidizer inlet temperature sensor 17 is fed back to the PLC controller 1. The temperature control unit of the PLC controller 1 compares the intake air temperature with the temperature setting value, and further adjusts the output power and frequency of the first heater 12 according to the comparison value so that the temperature delivered to the bottom of the reduced pressure fluidizer 3 approaches the set temperature. By accurately controlling the intake air temperature, the large fluidization temperature fluctuation is reduced, and the risk of ecological bacteria inactivation during reduced pressure drying is effectively reduced.

[0056] Among them, the air intake fan 6 and the negative pressure fan 7 are both adjustable speed fans. Through automatic speed adjustment, a certain negative pressure can be formed in the cavity of the pressure reducing fluidizer 3. According to the feedback of the detection value of the pressure probe 18, the PLC controller 1 further finely adjusts the air intake and outlet, and finally achieves the negative pressure in the cavity of the pressure reducing fluidizer to be stable within the set pressure value range, and automatically realizes the ecological bacteria-coated saline-alkali land improvement solid materials in the fluidized state to fully contact with the heated air and quickly dry.

[0057] Specifically, the PLC controller 1 is the controller of the whole ecological microbial agent-treated saline-alkali land improvement solid material preparation device, which is composed of a solid-state relay, a power regulator, etc., with a built-in industrial-grade computer and multiple control units, and an external touch-screen display. Its control software can perform parameter setting and program editing, and can realize automatic control of parameters such as temperature, pressure, and speed, and automatic program operation;

[0058] The solid-state relay is connected to the PLC controller 1 and the power regulator respectively, and is used to control the relay to be on and off through the PLC controller 1, and to control the opening or closing of the power regulator;

[0059] The power regulator is connected to the PLC controller 1 and the first and second heaters respectively, and is used to receive a given value signal input by the PLC controller 1 and output a given power value to the first and second heaters.

[0060] The application method of the fully automatic ecological bacterial agent coating saline-alkali land improvement solid material device comprises the following steps:

[0061] S1, adding the prepared slurry containing ecological bacteria agent and adhesive into the spraying machine 5, adding saline-alkali land improvement solid material into the coating pot 2, and turning on the heating fan 4 and the PLC controller 1;

[0062] S2, by setting the operating parameters of the coating pot 2 and the spraying machine 5 on the panel of the PLC controller 1 and running them in sequence, the solid materials for improving the saline-alkali land are coated with the ecological microbial agent, and when the spraying is completed, the spraying machine 5 is turned off, the heating fan 4 and the second heater 13 are turned on and the corresponding wind speed and temperature parameters are set, and the ecological microbial agent is preliminarily dried while the coating pot 2 is kept running, so as to reduce the adhesion between the ecological microbial agent and the solid materials for improving the saline-alkali land;

[0063] S3, when the bonding rate of the saline-alkali land improvement solid material coated with the ecological bacteria agent is lower than 15%, the heating fan 4 stops supplying air, the unloading valve 21 and the negative pressure fan 7 are opened synchronously, and the negative pressure fan 7 is set to an appropriate speed. When the pressure in the reduced pressure fluidized bed reaches -0.05Mpa, the feed valve 14 is opened to transfer the coated ecological bacteria agent saline-alkali land improvement solid material to the cavity of the reduced pressure fluidizer 3 through the negative pressure loading;

[0064] S4, after all the ecological bacteria agent coated saline-alkali land improvement solid materials have been transported, close the feed valve 14, turn on the air intake fan 6 of the pressure-reducing fluidizer, turn on the first heater 12 and set the heating temperature, adjust the ratio of air intake to air outlet, make the ecological bacteria agent coated saline-alkali land improvement solid materials in the drying chamber in a fluidized state, and keep the pressure in the chamber within 0.01-0.03Mpa while maintaining a good fluidized state, so as to achieve the purpose of quickly drying the ecological bacteria agent coated saline-alkali land improvement solid materials;

[0065] S5. After drying is completed, the speed of the negative pressure fan 7 is reduced to keep the pressure in the pressure reducing fluidizer chamber between 0.01-0.02Mpa, the first heater 12 is turned off, and the air intake wind speed of the air intake fan 6 is adjusted to keep the bacterial agent particles in a fluidized state, and the saline-alkali land improvement solid material coated with the ecological bacterial agent is discharged through the discharge port 8 of the pressure reducing fluidizer.

[0066] Implementation case 1:

[0067] Application of Bacillus amyloliquefaciens agent-coated soil conditioner in the present invention:

[0068] 1. Prepare the fermented concentrate of Bacillus amyloliquefaciens and the adhesive to a bacterial concentration of 1×10 10 / mL slurry and stir evenly for later use, the volume is 1000mL;

[0069] 2. Add the prepared slurry containing ecological bacteria agent and adhesive into the spraying machine;

[0070] 3. Add 10kg of soil conditioner granules into the coating pot, set the coating pot speed to 100RPM on the panel of the PLC controller and start the running motor to make the coating pot drive the soil conditioner granules to run;

[0071] 4. Set the spraying rate of the spraying machine to 100 mL / min on the panel of the PLC controller and adjust the atomizing nozzle of the spraying machine to a suitable position. Start the spraying machine to coat the conditioner with the ecological bacterial agent. When the spraying is completed, turn off the spraying machine.

[0072] 5. Set the air volume of the heating fan to 10L / min and the heating temperature of the second heater to 50℃ on the panel of the PLC controller. At the same time, adjust the hot air nozzle to a suitable position, turn on the heating fan to perform preliminary drying of the ecological microbial agent while keeping the coating pot running. The blowing of the heating fan can quickly evaporate the excess water on the surface of the soil conditioner coated with the ecological microbial agent and reduce the bonding rate between the conditioners.

[0073] 6. When the bonding rate of the conditioning agent wrapped by Bacillus amyloliquefaciens is lower than 15%, stop the air supply of the heating fan, open the unloading valve of the coating pot, and at the same time turn on the negative pressure fan with the function of reduced pressure fluidized drying. When the pressure in the reduced pressure fluidized bed reaches -0.05Mpa, open the feed valve to transfer the coated conditioning agent wrapped by Bacillus amyloliquefaciens into the cavity of the reduced pressure fluidizer through negative pressure;

[0074] 7. After all the conditioning agents wrapped by Bacillus amyloliquefaciens have been transported, close the feed valve, turn on the air intake fan of the pressure reducing fluidizer, set the heating temperature of the first heater to 50°C, adjust the speed ratio of the air intake fan to the negative pressure fan to 2:1, keep the pressure in the fluidizing chamber at about -0.02Mpa, and ensure that the ecological bacterial agent conditioning agent in the drying room is in a fluidized state, and quickly dry the conditioning agent wrapped by Bacillus amyloliquefaciens;

[0075] 8. After 30 minutes of drying in the reduced pressure fluidizer, the moisture content of the conditioner wrapped by Bacillus amyloliquefaciens drops below 1%, and the drying is considered complete. Turn off the first heater, adjust the speed ratio of the negative pressure fan and the air intake fan to 1:1.5 to keep the pressure in the drying chamber at 0.01Mpa, and keep the soil conditioner particles coated with the ecological bacteria in a fluidized state, and complete the discharge of the conditioner wrapped by Bacillus amyloliquefaciens through the discharge port of the reduced pressure fluidizer.

[0076] Comparative Example

[0077] While preparing the above Bacillus amyloliquefaciens coated conditioner, another portion of the same mass of Bacillus amyloliquefaciens coated conditioner was prepared using a common coating pan and drying oven with the same procedure.

[0078] During the preparation process of the Bacillus amyloliquefaciens coated conditioning agent, the production time was recorded, the binding rate was calculated, and the Bacillus amyloliquefaciens yield was detected and calculated.

[0079] Comparison between Example 1 and Comparative Example

[0080] Preparation method Preparation time Adhesion rate Yield of Bacillus amyloliquefaciens Traditional coating pan + ordinary drying oven 8 hours 28％ 35％ Improved coating pan + pressure reducing fluidizer 1.5 hours 10％ 78％

[0081] Implementation Case 2

[0082] Application of Bacillus megaterium coated soil conditioner in the present invention.

[0083] 1. Prepare the Bacillus megaterium fermentation concentrate and the adhesive to a bacterial concentration of 5×10 9 / mL slurry and stir evenly for later use, the volume is 1000mL;

[0084] 2. Repeat steps 2-7 in Example 1.

[0085] Comparative Example

[0086] While preparing the above Bacillus megaterium coated conditioner, another batch of Bacillus megaterium coated conditioner of the same mass was prepared using a common coating pan and drying oven with the same procedure.

[0087] During the preparation process of the Bacillus megaterium conditioning agent, the production time was recorded, the binding rate was calculated, and the Bacillus megaterium yield was detected and calculated.

[0088] Comparison between Example 2 and Comparative Example

[0089] Preparation method Preparation time Adhesion rate Bacillus megaterium yield Traditional coating pan + ordinary drying oven 10 o'clock 26％ 31％ Improved coating pan + pressure reducing fluidizer 2 hours 12％ 83％

[0090] From the comparison between the above two embodiments and the comparative example, it can be seen that the present invention has obvious advantages over the traditional coating method in terms of preparation time, bonding rate, and Bacillus recovery rate, indicating that the present invention has a significant effect on improving the production quality of ecological bacterial agent coated soil conditioning, and the design process of the present invention is simple and easy to scale up production.

[0091] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or seal including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or seal.

[0092] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A fully automatic ecological bacterial agent coating device for improving saline-alkali land solid materials, comprising a PLC controller (1), a coating pot (2) and a decompression fluidizer (3), wherein the coating pot (2) is provided with a discharge valve (21), a material collector (15) is placed below the discharge valve (21), the material collector (15) is connected to the decompression fluidizer (3) through a material delivery pipeline, and a feed valve (14) is installed on the material delivery pipeline, characterized in that: The interior of the coating pan (2) is communicated with the slurry drying unit and the spraying unit respectively, and the exterior of the coating pan (2) is meshed with the coating pan driving motor (11); The upper part of the reduced pressure fluidizer (3) is connected to the dust removal unit, the lower part of the reduced pressure fluidizer (3) is connected to the fluidized drying unit, and a reduced pressure fluidizer discharge port (8) is provided on the bottom side wall of the reduced pressure fluidizer (3); The PLC controller (1) is electrically connected to the slurry drying unit, the spraying unit, the dust removal unit, the fluidized drying unit, and the coating pan drive motor (11).

2. The fully automatic ecological bacterial agent coating saline-alkali land improvement solid material device according to claim 1 is characterized by: The slurry drying unit comprises a heating fan (4) and a second heater (13), the air outlet of the heating fan (4) is connected to one end of a hot air duct, and the other end of the hot air duct is provided with a hot air nozzle (19); The hot air nozzle (19) is located at the bottom of the inner wall of the coating pan (2); The second heater (13) is installed on the hot air duct near the heating fan (4), and a hot air temperature sensor (16) is installed on the hot air duct near the hot air nozzle (19); the heating fan (4) and the hot air temperature sensor (16) are both electrically connected to the PLC controller (1).

3. The fully automatic ecological bacterial agent coating saline-alkali land improvement solid material device according to claim 1 is characterized by: The spraying unit comprises a spraying machine (5), the slurry outlet of the spraying machine (5) is connected to one end of a spraying pipeline, the other end of the spraying pipeline is equipped with an atomizing nozzle (20), and the atomizing nozzle (20) is installed on the top of the inner wall of the coating pan (2); The shotcrete machine (5) is electrically connected to the PLC controller (1).

4. The fully automatic ecological bacterial agent coating saline-alkali land improvement solid material device according to claim 1 is characterized by: The dust removal unit comprises a negative pressure fan (7) and a cyclone separator (9), wherein the inlet of the cyclone separator (9) is connected to the top of the pressure reducing fluidizer (3), and the outlet of the cyclone separator (9) is connected to the air inlet end of the negative pressure fan (7); The negative pressure fan (7) is electrically connected to the PLC controller (1).

5. The fully automatic ecological bacterial agent coating saline-alkali land improvement solid material device according to claim 1 is characterized by: The fluidized drying unit comprises an air intake fan (6) and a first heater (12), the air outlet of the air intake fan (6) being connected to one end of a drying duct, and the other end of the drying duct being connected to the bottom of the pressure reducing fluidizer (3); The first heater (12) is installed on the drying duct, and a pressure-reducing fluidizer inlet air temperature sensor (17) is installed on the drying duct between the first heater (12) and the pressure-reducing fluidizer (3); The air intake fan (6) and the pressure reducing fluidizer air intake temperature sensor (17) are both electrically connected to the PLC controller (1).

6. The fully automatic ecological bacterial agent coating saline-alkali land improvement solid material device according to claim 1 is characterized by: It also comprises a pressure gauge (10) and a pressure probe (18), wherein the pressure gauge (10) and the pressure probe (18) are both installed on the side wall of the pressure reducing fluidizer (3).

7. The fully automatic ecological bacterial agent coating saline-alkali land improvement solid material device according to claim 1 is characterized by: The PLC controller (1) has a built-in industrial-grade computer and multiple temperature and pressure control units, and an external touch screen. Its control software can perform parameter setting and program editing, so as to achieve automatic control of temperature, pressure and speed parameters and automatic program operation.

8. An application method of a fully automatic ecological microbial agent coated saline-alkali land improvement solid material device, which is completed according to any one of claims 1 to 7, and is characterized in that: The following steps are involved: S1, adding the prepared slurry containing the ecological bacteria agent and the adhesive into the spraying machine (5), adding the saline-alkali land improvement solid material into the coating pot (2), and turning on the heating fan (4) and the PLC controller (1); S2, by setting the operating parameters of the coating pan (2) and the spraying machine (5) on the panel of the PLC controller (1) and running them in sequence, the solid materials for improving the saline-alkali land are coated with the ecological microbial agent, after the spraying is completed, the spraying machine (5) is turned off, the heating fan (4) and the second heater (13) are turned on and the corresponding wind speed and temperature parameters are set, and the ecological microbial agent is preliminarily dried while the coating pan (2) is kept running, so as to reduce the adhesion between the ecological microbial agent and the solid materials for improving the saline-alkali land; S3. When the bonding rate of the saline-alkali land improvement solid material coated with the ecological bacteria agent is lower than 15%, the heating fan (4) stops supplying air, the discharge valve (21) and the negative pressure fan (7) are opened synchronously, and the negative pressure fan (7) is set to an appropriate speed. When the pressure in the reduced pressure fluidized bed reaches -0.05Mpa, the feed valve (14) is opened to transfer the coated ecological bacteria agent saline-alkali land improvement solid material into the cavity of the reduced pressure fluidizer (3) through the negative pressure device; S4, after all the solid materials for improving saline-alkali land coated with ecological bacteria agents have been transported, close the feed valve (14), turn on the air intake fan (6) of the pressure reducing fluidizer, turn on the first heater (12) and set the heating temperature, adjust the ratio of air intake to air outlet, so that the solid materials for improving saline-alkali land coated with ecological bacteria agents in the drying chamber are in a fluidized state, and keep the pressure in the chamber within 0.01-0.03Mpa while maintaining a good fluidized state, so as to achieve the purpose of quickly drying the solid materials for improving saline-alkali land coated with ecological bacteria agents; S5. After drying is completed, the speed of the negative pressure fan (7) is reduced to keep the pressure in the pressure reducing fluidizer chamber between 0.01 and 0.02 MPa, the first heater (12) is turned off, the air intake speed of the air intake fan (6) is adjusted to keep the bacterial agent particles in a fluidized state, and the saline-alkali land improvement solid material coated with the ecological bacterial agent is discharged through the pressure reducing fluidizer discharge port (8).

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