Magnetic particle forming device for metal pollution reduction and remediation of rotary valve type polluted cultivated land soil

Abstract

The utility model relates to a rotary valve type magnetic particle forming device for pollution reduction and remediation of metal in polluted cultivated land soil, which is characterized in that a piston mounting seat and rotary valve cavities are arranged in a dripping seat body, a rotary valve is rotatably arranged in the rotary valve cavities, a material suction pipe and a material passing pipe which are axially perpendicular to each other are arranged in the rotary valve, a plurality of piston cavities are arranged on the piston mounting seat, and the piston cavities are communicated with the rotary valve. A lifting piston is arranged in the piston cavity, a dripping plate is arranged on the lower side of the rotary valve cavity, feeding pipes and dripping holes are arranged on the dripping plate in a staggered mode, the feeding pipes are communicated with the dripping storage cavity, and when the rotary valve rotates to the material suction position, lower end pipe openings of material suction pipes are communicated with the corresponding feeding pipes, and upper end pipe openings of the material suction pipes are communicated with the corresponding piston cavities. And when the rotary valve rotates to a dripping position, a feeding opening in the upper end of the material passing pipe is communicated with the corresponding piston cavity, and a discharging opening in the lower end of the material passing pipe is communicated with the corresponding dripping hole. According to the device, the preparation efficiency of the magnetic particles for soil metal pollution reduction and remediation is improved, and the preparation quality of the magnetic particles can be ensured.

Description

Technical Field

[0001] The utility model relates to the field of soil pollution restoration material preparation, in particular to a rotary valve type magnetic particle forming device for metal pollution reduction and restoration of polluted cultivated soil. Background Art

[0002] The pollution of heavy metal elements in the soil is one of the global soil environmental problems, which seriously threatens the quality safety of agricultural products, the safety of human living environment and the ecological environment. In addition, heavy metal pollution is highly concealed, lasts for a long time and is highly harmful, making it relatively difficult to remove.

[0003] At present, the remediation of heavy metal contaminated soil mainly ensures the quality and safety of agricultural products by reducing the activity of heavy metals. For example, the environmental risks are reduced through solidification and stabilization technology, low-accumulation crop planting, agronomic regulation and other technologies. However, reducing the activity of heavy metals cannot reduce the heavy metal content in the soil, and it cannot fundamentally improve the soil environmental quality. Therefore, the development of heavy metal reduction and remediation materials and related purification technologies is the key to solving existing technical bottlenecks, improving soil environmental quality and ensuring the safety of agricultural products.

[0004] In the prior art, there are many materials for soil metal pollution reduction and remediation, and with the development of technology, many soil heavy metal remediation materials appear in the form of magnetic particles. For example, CN112480930B discloses a magnetic soil heavy metal remediation agent, which aims at the problem that fly ash, coal gangue, kaolin and other high-silicon aluminum raw materials used in the prior art have more impurities. By using magnetic Fe3O4 modified with ethyl orthosilicate as the magnetic core, the silicon-containing tailings leaching residue is hydrothermally activated as the silicon source and alkali source of the outer shell of the synthetic remediation agent, and then using the hydrothermal method to synthesize a magnetic soil remediation agent with a core-shell structure. For example, CN112547029B discloses a microsphere composite material for the remediation of arsenic-containing water bodies and soil heavy metals, which uses a chemical coprecipitation method to prepare MnFe2O4 nanoparticles, adds them to a mixed solution of chitosan and dialdehyde polyethylene glycol, drops them into an alkaline solution after the reaction, and then washes them with deionized water to neutrality to obtain a microsphere composite material.

[0005] However, the prior art has not been sufficiently developed for the preparation of magnetic particles for soil remediation, and the existing soil remediation agent preparation devices generally have shortcomings such as small preparation volume and inability to achieve large-scale production. For example, patent CN114260309B discloses a soil remediation agent preparation device, which installs a solid quantitative dosing mechanism and a liquid quantitative dosing mechanism on a first material separation trough and a second material separation trough to facilitate staff to mix and prepare agents on the soil to be remediated in a timely manner. Patent CN 109807168B also discloses a device for preparing soil remediation agents, which mainly uses a carbonization chamber to prepare materials. The above devices are not for the preparation of magnetic particles and have a small output. Utility Model Content

[0006] The utility model aims to provide a rotary valve type magnetic particle forming device for metal pollution reduction and restoration of polluted cultivated soil, which improves the preparation efficiency of magnetic particles for metal pollution reduction and restoration of soil and can ensure the preparation quality of magnetic particles.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] A rotary valve type magnetic particle forming device for metal pollution reduction and restoration of polluted cultivated soil, comprising a dripping storage chamber, a dripping seat body and a rotary valve, wherein a piston mounting seat and a rotary valve chamber are arranged inside the dripping seat body, the rotary valve is rotatably arranged in the rotary valve chamber, a suction pipe and a feeding pipe with axial directions perpendicular to each other are arranged inside the rotary valve, a plurality of piston chambers are arranged on the piston mounting seat, a liftable piston is arranged in the piston chamber, a dripping plate is arranged on the lower side of the rotary valve chamber, a feeding pipe and a dripping hole are staggered on the dripping plate, and the feeding pipe is connected with the dripping storage chamber, when the rotary valve is rotated to the suction position, the suction pipe port at the lower end of the suction pipe is connected with the corresponding feeding pipe, and the discharge pipe port at the upper end of the suction pipe is connected with the corresponding piston chamber, when the rotary valve is rotated to the dripping position, the feed inlet at the upper end of the feeding pipe is connected with the corresponding piston chamber, and the drop outlet at the lower end of the feeding pipe is connected with the corresponding dripping hole.

[0009] An intermediate plate is provided inside the drip seat body, and a rotary valve cavity is formed between the intermediate plate and the drip plate. The piston mounting seat is fixedly arranged on the upper side of the intermediate plate. A plurality of connecting holes are provided on the intermediate plate, and each connecting hole is respectively connected to the corresponding piston cavity. The dripping holes on the dripping plate are respectively coaxially aligned with the corresponding connecting holes.

[0010] The feeding pipe on the dripping plate is horizontally arranged on the upper side of the dripping plate and its axial direction is perpendicular to the axial direction of the rotary valve.

[0011] A plurality of rows of rotary valve cavities are arranged inside the dripping seat body, and a rotary valve is arranged in each rotary valve cavity. A rotary valve motor is arranged outside the dripping seat body, and the rotary valve is driven to rotate by the corresponding rotary valve motor.

[0012] The upper end of each piston is connected to a piston connecting rod, and the piston connecting rod is driven to rise and fall through a linear drive device.

[0013] A magnetic particle solidification device is provided under the dripping seat body, and the magnetic particle solidification device includes a first cross-linking reaction chamber, a second cross-linking reaction chamber and a reflux pipe, wherein a liftable overflow plate is provided between the first cross-linking reaction chamber and the second cross-linking reaction chamber, the input end of the reflux pipe is connected to the second cross-linking reaction chamber, the output end of the reflux pipe is connected to the first cross-linking reaction chamber, and a reflux pump is provided on the reflux pipe.

[0014] A liquid level detection device is provided on the upper side of the first cross-linking reaction chamber, a rack is provided on one side of the overflow plate to mesh with a gear, and the gear is driven to rotate by a motor, and an output conveyor belt is provided inside the second cross-linking reaction chamber.

[0015] The advantages and positive effects of the utility model are:

[0016] 1. The utility model can realize the mass dripping operation of magnetic particles, thereby greatly improving the efficiency of magnetic particle preparation. The utility model uses a rotary valve with a suction pipe and a feeding pipe inside to realize the conversion of the device's suction state and dripping state, and the internal structure of the rotary valve and the rotary valve operation control are very simple. The utility model can also set multiple rows of rotary valves inside the dripping seat body as needed, thereby further improving the dripping quantity and dripping efficiency.

[0017] 2. The utility model utilizes piston lifting to realize material suction operation, and the utility model can control the amount of material sucked into the piston cavity by controlling the piston lifting height, thereby ensuring that the particle size formed by subsequent dripping meets the requirements. At the same time, the synchronous lifting of each piston can ensure that the amount of material sucked into each piston cavity is the same, thereby ensuring that the particle size formed by subsequent dripping remains consistent, thereby ensuring the quality of the magnetic particle product finally formed.

[0018] 3. The magnetic particle solidification device at the bottom of the utility model ensures that the material particles react completely and fully solidify by setting two cross-linking reaction chambers, and at the same time will not affect the continuous dripping. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the structural front view of the utility model.

[0020] Figure 2 for Figure 1 Schematic diagram of the internal structure of the dropper seat.

[0021] Figure 3 for Figure 2 A three-dimensional diagram of the suction pipe and the feeding pipe inside the transfer valve.

[0022] Figure 4 for Figure 2 Schematic diagram of the coordination between the suction pipe opening of the middle suction pipe and the feeding pipe.

[0023] Figure 5 for Figure 2 The working status of the medium dropper seat Figure 1 ,

[0024] Figure 6 for Figure 2 Working status diagram of the medium dropper seat Figure 2 ,

[0025] Figure 7 for Figure 6 AA view in

[0026] Figure 8 This is a schematic diagram of the use state of the utility model.

[0027] Fig. 9 for Figure 8 Schematic diagram of the structure of the magnetic particle solidification device.

[0028] Among them, 101 is a dripping storage chamber, 102 is a dripping seat body, 103 is a piston, 1031 is a piston connecting rod, 104 is a piston mounting seat, 1041 is a piston cavity, 105 is an intermediate plate, 1051 is a connecting hole, 106 is a rotary valve, 1061 is a suction pipe, 10611 is a suction pipe port, 10612 is a discharge pipe port, 1062 is a feed pipe, 107 is a rotary valve motor, 108 is a dripping plate, 1081 is a feeding pipe, 1082 is a dripping hole, 2 is a magnetic particle solidification device, 201 is a first cross-linking reaction chamber, 202 is a second cross-linking reaction chamber, 203 is an overflow plate, 2031 is a rack, 2032 is a gear, 204 is a reflux pipe, 2041 is a reflux pump, 2042 is a reflux filter, and 205 is an output conveyor belt. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] like Figures 1 to 9 As shown, the utility model includes a drip storage chamber 101, a drip seat body 102 and a rotary valve 106, wherein the drip seat body 102 is arranged at the lower side of the drip storage chamber 101, as shown in FIG. Figure 2As shown, the dripping seat body 102 is provided with a piston mounting seat 104, an intermediate plate 105 and a dripping plate 108, and a rotary valve cavity is formed between the intermediate plate 105 and the dripping plate 108, and the rotary valve 106 is rotatably arranged in the rotary valve cavity, the piston mounting seat 104 is fixedly arranged on the upper side of the intermediate plate 105, and the piston mounting seat 104 is provided with a plurality of piston cavities 1041, and the piston cavity 1041 is provided with a piston 103 that can be raised and lowered, and the intermediate plate 105 is provided with a plurality of connecting The rotary valve 106 is provided with a suction pipe 1061 and a feeding pipe 1062 which are axially perpendicular to each other. The dripping plate 108 is provided with a feeding pipe 1081 and a dripping hole 1082 in an alternating manner. The feeding pipe 1081 is horizontally arranged on the upper side of the dripping plate 108 and is axially perpendicular to the axial direction of the rotary valve 106. Each dripping hole 1082 is coaxially aligned with the corresponding connection hole 1051 and has the same aperture, as shown in FIG. Figures 2 to 5 As shown, when the rotary valve 106 is turned to the suction position, the suction pipe port 10611 at the lower end of the suction pipe 1061 is connected to the corresponding feeding pipe 1081, and the discharge pipe port 10612 at the upper end of the suction pipe 1061 is connected to the corresponding connecting hole 1051, and at this time, the material passing pipe 1062 is turned to the horizontal position and no material passes through, as shown in FIG. Figures 6-7 As shown, when the rotary valve 106 is rotated to the dripping position, the feed inlet at the upper end of the feed pipe 1062 is connected to the corresponding connection hole 1051, and the drop outlet at the lower end of the feed pipe 1062 is connected to the corresponding dripping hole 1082, and at this time, the suction pipe 1061 is rotated to a horizontal position. The middle plate 105 and the dripping plate 108 can be integrally formed with the side plates on both sides of the dripping seat body 102 using a mold or the like. In addition, the middle plate 105 and the dripping plate 108 can also be made into an integral cylindrical shape to cooperate with the rotary valve 106 according to actual needs, or can be made into a separate structure for easy disassembly and assembly.

[0031] like Figures 1 to 7 As shown, in this embodiment, a rotary valve motor 107 is provided on the outer side of the dripping seat body 102 , and the rotary valves 106 are driven to rotate by the corresponding rotary valve motors 107 .

[0032] like Figures 1 to 7 As shown, in this embodiment, the upper end of each piston 103 is connected to a piston connecting rod 1031, and the piston connecting rod 1031 is driven to rise and fall by a linear drive device such as a cylinder or an electric push rod, thereby driving each piston 103 to rise and fall synchronously. Figure 5As shown, the piston 103 rises and the material in the corresponding feeding pipe 1081 is sucked into the piston cavity 1041 through the corresponding suction pipe 1061, and the utility model can control the rising height of the piston connecting rod 1031 according to the prepared particle size, that is, control the rising height of each piston 103, so that on the one hand, the amount of material sucked into the piston cavity 1041 can be controlled so that the particle size finally formed by dripping meets the requirements, and on the other hand, the synchronous lifting and lowering of each piston 103 can also ensure that the amount of material sucked into each piston cavity 1041 is consistent, thereby ensuring the consistency of the size of the final magnetic particle product. Figure 6 As shown, when the piston 103 rises to its position, the rotary valve 106 rotates so that the two ends of the feed pipe 1062 inside it are connected to the corresponding piston cavity 1041 (through the corresponding connecting hole 1051) and the dripping hole 1082 respectively, and then the piston 103 descends to squeeze out the material in the piston cavity 1041, and the material enters the corresponding dripping hole 1082 through the connecting hole 1051 and the feed pipe 1062 in turn and drips into the magnetic particle coagulation device 2 below.

[0033] In addition, the rotary valve motor 107 needs to be controlled by the control system to operate in conjunction with the driving device (such as a cylinder, electric cylinder or servo motor, etc.) that moves the piston 103, so as to ensure that when the rotary valve 106 is rotated to the suction position, that is, when the suction pipe 1061 is connected to the piston cavity 1041, the piston 103 moves upward to suck the material, and when the rotary valve 106 is rotated to the material passing pipe 5062 and connected to the piston cavity 1041, the piston 103 moves downward, and the liquid material is discharged, forming a dripping process, and so on and so forth, working continuously.

[0034] like Figure 7 As shown, the utility model can set multiple rows of rotary valve cavities inside the dripping seat body 102 as needed, and the rotary valve 106 is provided inside each rotary valve cavity, so as to further improve the material dripping efficiency. In this embodiment, the space between the intermediate plate 105 and the dripping plate 108 can form multiple rotary valve cavities by setting multiple vertical partitions, and the feeding pipe 1081 runs through the entire dripping plate 108, so that the suction pipe 1061 in each rotary valve 106 can be connected to the corresponding feeding pipe 1081 to absorb the material. In addition, either end of the feeding pipe 1081 can be connected to the dripping storage cavity 101 on the upper side of the dripping seat body 102 through the feeding pipeline. The feeding pipeline can be provided with a metering pump and other devices as needed to ensure that each feeding pipe 1081 is full of materials, and there will be no situation where a part of the material in the feeding pipe 1081 is insufficient, resulting in insufficient suction after the piston 103 is lifted. This is a well-known technology in the art.

[0035] like Figures 8-9As shown, a magnetic particle solidification device 2 is provided under the dripping seat body 102, and the magnetic particle solidification device 2 includes a first cross-linking reaction chamber 201, a second cross-linking reaction chamber 202 and a reflux pipe 204, wherein a liftable overflow plate 203 is provided between the first cross-linking reaction chamber 201 and the second cross-linking reaction chamber 202, the input end of the reflux pipe 204 is connected to the second cross-linking reaction chamber 202, and the output end of the reflux pipe 204 is connected to the first cross-linking reaction chamber 201, and a reflux pump 2041 is provided on the reflux pipe 204. The first cross-linking reaction chamber 201 and the second cross-linking reaction chamber 202 are both provided with a cross-linking solution. When the droplets dripped by the dripping device 1 fall into the first cross-linking reaction chamber 201, they instantly react and solidify to form solid gel particles and precipitate. As the number of material particles increases, the liquid level in the first cross-linking reaction chamber 201 will rise. When the liquid level detection device detects that the liquid level in the first cross-linking reaction chamber 201 reaches a set height, the overflow plate 203 rises and opens, and the reflux pump 2041 is started. At this time, the liquid at the bottom of the first cross-linking reaction chamber 201 drives the material particles to flow to the second cross-linking reaction chamber 201. The second cross-linking reaction chamber 202 is provided with a second cross-linking reaction chamber 202, and the cross-linking solution in the second cross-linking reaction chamber 202 flows into the first cross-linking reaction chamber 201, thereby forming a liquid circulation flow. The bottom of the second cross-linking reaction chamber 202 is lower than the bottom of the first cross-linking reaction chamber 201, so that more material particles can be accommodated in the second cross-linking reaction chamber 202, while ensuring that the material particles react completely and fully solidify, and will not affect the continuous dripping. The second cross-linking reaction chamber 202 is provided with an output conveyor belt 205, and the solidified material particles are output through the output conveyor belt 205 to enter the next process. In addition, Fig. 9 As shown, a reflux filter 2042 is provided at the input end of the reflux pipe 204 to prevent the material particles from being sucked back. The liquid level detection device is a well-known technology in the art and is a commercially available product, such as a liquid level detection sensor.

[0036] like Fig. 9 As shown, in this embodiment, a rack 2031 is provided on one side of the overflow plate 203 to mesh with a gear 2032, and the gear 2032 is driven to rotate by a motor, thereby realizing the lifting and lowering of the overflow plate 203.

[0037] The working principle of the utility model is:

[0038] In an application example of the present invention, magnetic particles are prepared using raw materials such as powdered attapulgite, zeolite, magnetic ferroferric oxide powder, silane coupling agent, and natural polymer sodium alginate, wherein the cross-linking solution in the magnetic particle solidification device 2 is a CaCl2 solution. In the previous process, the above raw materials are pre-treated by modified stirring and degassing, and then enter the utility model for dripping operation. In this application example, a sodium alginate solution (which has a certain viscosity) is cross-linked with calcium ions to form magnetic composite particle balls, which are dried to obtain magnetic particles for metal pollution reduction and restoration of contaminated cultivated soil.

[0039] The specific process flow of this application example is: adding attapulgite powder, silane coupling agent and softened water to a raw material modification tank and stirring, adding sodium alginate, zeolite powder, ferroferric oxide powder and softened water to a mixed liquid pre-mixing tank and stirring, and then inputting the materials in the raw material modification tank and the materials in the mixed liquid pre-mixing tank into a mixed liquid preparation tank for stirring, and finally conveying the materials to a mixed liquid degassing storage tank to use high-frequency ultrasound to remove residual bubbles, thereby completing the pretreatment of the raw materials.

[0040] After pretreatment, the raw material flows into the drip storage chamber 101 of the utility model, and then flows into each feeding pipe 1081 on the drip plate 108, such as Figures 2 to 5 As shown, when the rotary valve 106 in the dripping seat body 102 is rotated to the suction position, the suction pipe port 10611 at the lower end of the suction pipe 1061 in the rotary valve 106 is connected to the corresponding feeding pipe 1081, and the discharge pipe port 10612 at the upper end of the suction pipe 1061 is connected to the corresponding connecting hole 1051, and then each piston 103 rises synchronously to suck the material in the corresponding feeding pipe 1081 into the corresponding piston cavity 1041 through the corresponding suction pipe 1061, and the utility model can control the rising height of the piston connecting rod 1031 according to the prepared particle size, that is, control the rising height of each piston 103, so that the amount of material sucked into the piston cavity 1041 finally The particle size formed by dripping meets the requirements, and the synchronous lifting and lowering of each piston 103 also ensures that the amount of material sucked into each piston cavity 1041 is consistent, thereby ensuring the consistency of the size of the subsequent magnetic particle products, and when the piston 103 rises to the position, as shown Figure 6 As shown, the rotary valve 106 rotates to the dripping position, at which time the feed port at the upper end of the feed tube 1062 is connected to the corresponding connecting hole 1051, and the drop port at the lower end of the feed tube 1062 is connected to the corresponding dripping hole 1082, and then the piston 103 descends to squeeze out all the materials in the piston cavity 1041, and the materials enter the corresponding dripping hole 1082 through the corresponding connecting hole 1051 and the feed tube 1062 in turn and drip into the magnetic particle solidification device 2 below to solidify.

[0041] And as Figures 8-9 As shown, when the dripping droplets of the utility model fall into the first cross-linking reaction chamber 201 of the magnetic particle solidification device 2 below, they come into contact with the cross-linking solution and react and solidify to form solid gel particles and precipitate. As the number of material particles increases, the liquid level in the first cross-linking reaction chamber 201 will rise. When the liquid level detection device detects that the liquid level in the first cross-linking reaction chamber 201 reaches the set height, the overflow plate 203 rises and opens, and the reflux pump 2041 starts. At this time, the liquid at the bottom of the first cross-linking reaction chamber 201 drives the material particles to flow to the second cross-linking reaction chamber 202, and the cross-linking solution in the second cross-linking reaction chamber 202 flows into the first cross-linking reaction chamber 201, thereby forming a liquid circulation flow. The bottom of the second cross-linking reaction chamber 202 is lower than the bottom of the first cross-linking reaction chamber 201, so that more material particles can be accommodated in the second cross-linking reaction chamber 202, while ensuring that the material particles react completely and fully solidify, it will not affect the continuous dripping.

Claims

1. A rotary valve type magnetic particle forming device for metal pollution reduction and restoration of polluted cultivated soil, characterized in that: The invention comprises a dripping storage chamber (101), a dripping seat body (102) and a rotary valve (106), wherein a piston mounting seat (104) and a rotary valve chamber are arranged inside the dripping seat body (102), the rotary valve (106) is rotatably arranged in the rotary valve chamber, a material suction pipe (1061) and a material passing pipe (1062) which are axially perpendicular to each other are arranged inside the rotary valve (106), a plurality of piston chambers (1041) are arranged on the piston mounting seat (104), a piston (103) which can be lifted and lowered is arranged in the piston chamber (1041), a dripping plate (108) is arranged at the lower side of the rotary valve chamber, a feeding pipe (1081) and a dripping hole (108) are staggeredly arranged on the dripping plate (108), and a liquid feeding pipe (1081) and a liquid feeding hole (1082) are staggeredly arranged on the dripping plate (108). 1082), and the feeding pipe (1081) is connected to the dripping storage chamber (101); when the rotary valve (106) is turned to the suction position, the suction pipe opening (10611) at the lower end of the suction pipe (1061) is connected to the corresponding feeding pipe (1081), and the discharge pipe opening (10612) at the upper end of the suction pipe (1061) is connected to the corresponding piston cavity (1041); when the rotary valve (106) is turned to the dripping position, the feed inlet at the upper end of the feed pipe (1062) is connected to the corresponding piston cavity (1041), and the drop outlet at the lower end of the feed pipe (1062) is connected to the corresponding dripping hole (1082).

2. The rotary valve type magnetic particle forming device for metal pollution reduction and restoration of polluted cultivated soil according to claim 1 is characterized by: An intermediate plate (105) is provided inside the dripping seat body (102), and a rotary valve cavity is formed between the intermediate plate (105) and the dripping plate (108). The piston mounting seat (104) is fixedly arranged on the upper side of the intermediate plate (105). A plurality of connecting holes (1051) are provided on the intermediate plate (105), and each connecting hole (1051) is respectively connected to a corresponding piston cavity (1041). The dripping holes (1082) on the dripping plate (108) are respectively coaxially aligned with the corresponding connecting holes (1051).

3. The rotary valve type magnetic particle forming device for metal pollution reduction and restoration of polluted cultivated soil according to claim 1 is characterized by: The feeding pipe (1081) on the dripping plate (108) is horizontally arranged on the upper side of the dripping plate (108) and its axial direction is perpendicular to the axial direction of the rotary valve (106).

4. The rotary valve type magnetic particle forming device for metal pollution reduction and restoration of polluted cultivated soil according to claim 1 is characterized in that: A plurality of rows of rotary valve cavities are arranged inside the dripping seat body (102), and a rotary valve (106) is arranged in each rotary valve cavity. A rotary valve motor (107) is arranged outside the dripping seat body (102), and the rotary valve (106) is driven to rotate by the corresponding rotary valve motor (107).

5. The rotary valve type magnetic particle forming device for metal pollution reduction and restoration of polluted cultivated soil according to claim 1 is characterized by: The upper end of each piston (103) is connected to a piston connecting rod (1031), and the piston connecting rod (1031) is driven to rise and fall by a linear drive device.

6. The rotary valve type magnetic particle forming device for metal pollution reduction and restoration of polluted cultivated soil according to claim 1, characterized in that: A magnetic particle solidification device (2) is provided below the dripping seat (102), and the magnetic particle solidification device (2) comprises a first cross-linking reaction chamber (201), a second cross-linking reaction chamber (202) and a reflux pipe (204), wherein a liftable overflow plate (203) is provided between the first cross-linking reaction chamber (201) and the second cross-linking reaction chamber (202), an input end of the reflux pipe (204) is connected to the second cross-linking reaction chamber (202), and an output end of the reflux pipe (204) is connected to the first cross-linking reaction chamber (201), and a reflux pump (2041) is provided on the reflux pipe (204).

7. The rotary valve type magnetic particle forming device for metal pollution reduction and restoration of polluted cultivated soil according to claim 6 is characterized by: A liquid level detection device is provided on the upper side of the first cross-linking reaction chamber (201); a rack (2031) is provided on one side of the overflow plate (203) and meshes with a gear (2032); the gear (2032) is driven to rotate by a motor; and an output conveyor belt (205) is provided inside the second cross-linking reaction chamber (202).

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