Reaction equipment and method for producing agricultural magnesium hydroxide based thereon

Abstract

The present invention relates to a reaction device and a method for producing agricultural magnesium hydroxide based on the reaction device. The reaction device comprises: a reaction tank, wherein a brine storage and delivery device and an alkali solution storage and delivery device are provided on the top surface of the reaction tank, a plurality of barrels are arranged around the interior of the reaction tank, the barrels are rotatably arranged on the reaction tank, and a residue separation device is provided between the barrels and the reaction tank. The reaction device can first make the brine and the alkali solution contact with each other over a large area and react in large quantities to generate magnesium hydroxide precipitates, and then make the brine and the alkali solution that have been in contact with each other fully and efficiently react to generate magnesium hydroxide precipitates; the reaction device can prevent the magnesium hydroxide precipitate from being difficult to separate from the reaction device subsequently, and can prevent the magnesium hydroxide precipitate from being incompletely washed and having low drying efficiency; and the magnesium hydroxide precipitate can be prevented from agglomerating in the reaction device.

Description

Technical Field

[0001] This invention relates to the field of industrial equipment, specifically to a reaction apparatus and a method for producing agricultural magnesium hydroxide based thereon. Background Technology

[0002] Magnesium hydroxide is an important chemical product and intermediate with wide applications and demand in environmental protection, pharmaceuticals, food, agriculture, chemicals, petrochemicals, and electronics industries. Industrially, magnesium hydroxide precipitate is often produced by reacting bittern with alkaline solution, and then further processed to obtain agricultural-grade magnesium hydroxide.

[0003] Existing reaction equipment cannot allow bittern and alkali to first come into large-area contact and react in large quantities to generate magnesium hydroxide precipitate, and then allow the bittern and alkali that have already come into contact with each other to react fully and efficiently to generate magnesium hydroxide precipitate.

[0004] It cannot prevent magnesium hydroxide precipitate from being difficult to remove from the reaction equipment, nor can it prevent incomplete washing and low drying efficiency of the magnesium hydroxide precipitate; it cannot prevent magnesium hydroxide precipitate from clumping together in the reaction equipment.

[0005] After the reaction of bittern and alkaline solution, it is impossible to accelerate the filtration speed of magnesium hydroxide precipitate, prevent magnesium hydroxide precipitate from hindering the rapid and complete passage of filtrate, prevent magnesium hydroxide precipitate from clumping and adhering to reaction equipment, and achieve complete separation of filtrate and magnesium hydroxide precipitate.

[0006] The purpose of this invention is to design a reaction device and a method for producing agricultural magnesium hydroxide based on it, in order to address the problems existing in the prior art. Summary of the Invention

[0007] In view of the problems existing in the prior art, the present invention provides a reaction device and a method for producing agricultural magnesium hydroxide based thereon, which can effectively solve at least one of the problems existing in the prior art.

[0008] The technical solution of this invention is:

[0009] A reaction apparatus, comprising:

[0010] A reaction tank is provided with a bittern storage and conveying device and an alkali storage and conveying device on its top surface. Several barrels are arranged around the inside of the reaction tank. The barrels are rotatably mounted on the reaction tank. A residue removal device is provided between the barrels and the reaction tank. A charging-reverse anti-bulking rod is rotatably mounted at the bottom of the inside of the barrel. A charging-reverse anti-bulking driving device is provided between the barrel and the charging-reverse anti-bulking rod. A dispersion foaming plate is raised and lowered inside the barrel and above the charging-reverse anti-bulking rod. A dispersion foaming driving device is provided between the barrel and the dispersion foaming plate.

[0011] A liquid outlet pipe is connected to the bottom surface of the reaction tank and located between several of the tanks; a solid-plastic outlet pipe has its bottom end extending out of the bottom surface of the reaction tank and located on one side of the liquid outlet pipe. A receiving filter screen is provided on the outside of the top end of the solid-plastic outlet pipe. Several re-detachment and dispersing ropes are provided between the receiving filter screen and the inner top surface of the reaction tank. The re-detachment and dispersing ropes are located between adjacent tanks and on the inner side of the tanks. A re-detachment and dispersing drive device is provided between the re-detachment and dispersing ropes and the inner top surface of the reaction tank.

[0012] The dispersion foaming plate is driven to reciprocate up and down during the transport of the bittern to be reacted to several barrels in the bittern storage and transport device, so as to disperse the bittern and alkali solution falling vertically into the barrel and disperse them on the inner wall of the barrel; the dispersion foaming plate is driven to reciprocate down and up before the bittern to be reacted to be transported to several barrels again, so as to beat the mixture located above the charging anti-bubbling rod to generate bubbles before the bittern to be reacted to be transported to several barrels again.

[0013] The re-desorption and dispersion driving device is used to drive the receiving filter screen to reciprocate up and down before the receiving filter screen receives the mixture that has left the tank, so that the magnesium hydroxide precipitate repeatedly leaves the receiving filter screen while the receiving filter screen receives the mixture that has left the tank, allowing the filtrate to pass through quickly and completely; the re-desorption and dispersion driving device is used to drive the receiving filter screen to reciprocate up and down after the receiving filter screen has completely passed through, so that the magnesium hydroxide precipitate on the receiving filter screen is repeatedly shaken, so that the magnesium hydroxide precipitate is dispersed and leaves the receiving filter screen after the receiving filter screen has completely passed through, and enters the solid plastic outlet pipe.

[0014] Furthermore, the residue removal device includes a connecting frame disposed on the inner wall of the reaction tank and located below the barrel body. A rotating shaft is rotatably disposed on the connecting frame, and a first rotating motor that is drively connected to the rotating shaft is disposed on the connecting frame. A linkage rod is disposed between the bottom end face of the barrel body and the rotating shaft.

[0015] Furthermore, the anti-reverse charging and anti-clogging driving device includes a second rotating motor, which is disposed on the outer surface of the barrel. The rotating end of the second rotating motor passes through the barrel and is fixedly connected to the anti-reverse charging and anti-clogging rod. The rotating end of the second rotating motor is connected to the barrel through a sealing ring.

[0016] Furthermore, the dispersion foaming drive device includes two symmetrically arranged connecting plates, which are located at the top inside of the barrel. The connecting plates are provided with telescopic components, and the telescopic ends of the telescopic components are connected to the dispersion foaming plates.

[0017] Furthermore, the re-de-dispersing drive device includes a third rotating motor, which is disposed on the inner top surface of the reaction tank and above the re-de-dispersing rope. The rotating end of the third rotating motor is provided with two limiting rings, and the re-de-dispersing rope is connected to the rotating end of the third rotating motor and located between the two limiting rings.

[0018] Furthermore, the bittern storage and transportation device includes several bittern pipelines, which are located on the inner top surface of the reaction tank and directly above the tank body. A bittern storage tank is provided on the top surface of the reaction tank. A bittern connecting pipe with a solenoid valve is provided between the bittern storage tank and the bittern pipelines. Several bittern connecting pipes are connected to the bittern storage tank through bittern connecting pipes.

[0019] Furthermore, the alkali storage and transportation device includes several alkali delivery pipes, which are located on the inner top surface of the reaction tank and directly above the tank body. An alkali storage tank is provided on the top surface of the reaction tank. An alkali connection pipe with a solenoid valve is provided between the alkali storage tank and the alkali delivery pipes. Several alkali connection pipes are connected to the alkali storage tank through alkali connecting pipes.

[0020] Furthermore, a heating device is provided inside the bottom of the barrel; the heating device is used to heat the bitter brine to be reacted to a predetermined temperature during the transport of the bitter brine to be reacted to several barrels in the bitter brine storage and transport device, so as to accelerate the reaction of the bitter brine and alkaline solution that have been in contact with each other on the inner wall of the barrel to generate magnesium hydroxide precipitate at the bottom of the barrel.

[0021] Based on the same inventive concept, the present invention also provides a method for producing agricultural magnesium hydroxide, comprising the following steps:

[0022] The bittern is pretreated by purification and dilution and then stored in a bittern storage and transportation device; the bittern storage and transportation device periodically and evenly distributes the bittern to be reacted into several barrels, and the bittern to be reacted falls vertically into each barrel; the alkali storage and transportation device distributes alkali into several barrels at a predetermined flow rate during the period when the bittern storage and transportation device distributes the bittern to be reacted into several barrels, and the alkali falls vertically into each barrel.

[0023] During the transport of the bittern to be reacted to several barrels in the bittern storage and transportation device, the dispersion foaming plate is driven to move up and down repeatedly to disperse the bittern and alkali solution that fall vertically into the barrel and disperse the bittern and alkali solution on the inner wall of the barrel.

[0024] During the transport of the bittern to be reacted to several tanks in the bittern storage and transportation device, the anti-agglomeration rod is driven to rotate periodically to periodically disturb the mixture at the bottom of the tanks, so as to prevent the magnesium hydroxide precipitate that has been generated from agglomerating at the bottom of the tanks.

[0025] In the next step of the bittern storage and transportation device, the dispersion and foaming plate is driven to move up and down repeatedly in front of several barrels to beat the mixture located above the charging and anti-bubbling rod to generate bubbles.

[0026] Before the bittern to be reacted is transported to several barrels in the bittern storage and transportation device, the residue removal device drives the barrels to rotate back and forth so that the mixture remaining on the inner wall of the barrel can be removed from the inner wall of the barrel before the bittern to be reacted is transported to several barrels in the bittern storage and transportation device.

[0027] After the bittern to be reacted is transported to several barrels several times by the bittern storage and transportation device, the residue removal device drives the barrel to rotate at a predetermined angle toward the axis of the reaction tank so that the mixture inside the barrel is removed from the barrel and falls onto the receiving filter screen; after the residue removal device removes the mixture from the barrel, the receiving filter screen receives and filters the mixture.

[0028] Before the receiving filter screen receives the mixture that has left the tank, the re-dispersing drive device drives the receiving filter screen to rise and fall repeatedly, so that when the receiving filter screen receives the mixture that has left the tank, the magnesium hydroxide precipitate repeatedly leaves the receiving filter screen, allowing the filtrate to pass through quickly and completely;

[0029] After the filtrate has completely passed through the receiving filter, the re-detachment and dispersing drive device drives the receiving filter to move up and down repeatedly, causing the magnesium hydroxide precipitate on the receiving filter to be shaken repeatedly, so that after the filtrate has completely passed through the receiving filter, the magnesium hydroxide precipitate is dispersed and detached from the receiving filter and enters the solid plastic outlet pipe.

[0030] The liquid outlet pipe allows the filtrate passing through the filter screen to be discharged to the outside of the reaction tank, while the solid plastic outlet pipe is used to discharge the magnesium hydroxide precipitate to the outside of the reaction tank. The magnesium hydroxide precipitate discharged through the solid plastic outlet pipe is washed and dried to obtain agricultural magnesium hydroxide.

[0031] Therefore, the present invention provides the following effects and / or advantages:

[0032] 1) The bittern is pretreated by purification and dilution and stored in a bittern storage and transportation device; the bittern storage and transportation device is used to store the pretreated bittern to be reacted, and the bittern storage and transportation device is used to periodically and evenly distribute the bittern to be reacted into several tanks, with the bittern to be reacted falling vertically into each tank; the alkali storage and transportation device is used to store alkali, and the alkali storage and transportation device is used to evenly distribute the alkali into several tanks at a predetermined flow rate during the period when the bittern storage and transportation device is conveying the bittern to be reacted into several tanks, with the alkali falling vertically into each tank.

[0033] The dispersion foaming plate is used to be driven to move up and down repeatedly during the transportation of the bitter brine to be reacted to several barrels in the bitter brine storage and transportation device, so as to disperse the bitter brine and alkali solution that fall vertically into the barrel and disperse the bitter brine and alkali solution on the inner wall of the barrel, thereby allowing the bitter brine and alkali solution to come into contact over a large area on the inner wall of the barrel and react in large quantities to generate magnesium hydroxide precipitate.

[0034] The anti-clumping rod is used to periodically rotate during the transport of the bittern to be reacted in several tanks in the bittern storage and transportation device, so as to periodically disturb the mixture at the bottom of the tank, thereby allowing the bittern and alkaline solution that have been in contact with each other on the inner wall of the tank to fully and efficiently react at the bottom of the tank to generate magnesium hydroxide precipitate, so as to prevent the generated magnesium hydroxide precipitate from clumping at the bottom of the tank, thereby preventing the magnesium hydroxide precipitate from being difficult to remove from the tank later, and preventing incomplete washing and low drying efficiency of the magnesium hydroxide precipitate later.

[0035] The dispersion bubble-generating plate is driven to reciprocate up and down before the bittern to be reacted is transported to several barrels in the bittern storage and transportation device. This causes the mixture located above the charging and anti-agglomeration rod to generate bubbles before the bittern to be reacted is transported to several barrels in the bittern storage and transportation device. This makes it difficult for the magnesium hydroxide precipitate generated on the inner wall of the barrel to agglomerate when it falls onto the surface of the mixture. This also makes it difficult for the magnesium hydroxide precipitate generated on the inner wall of the barrel to agglomerate with the magnesium hydroxide precipitate at the bottom of the barrel after it falls onto the surface of the mixture.

[0036] The charging-reverse anti-bulking driving device is used to drive the charging-reverse anti-bulking rod to move, and the dispersion foaming driving device is used to drive the dispersion foaming plate to move.

[0037] The residue removal device is used to drive the barrels to rotate back and forth before the bittern storage and transportation device delivers the bittern to be reacted to several barrels next time. This allows the mixture remaining on the inner wall of the barrel to be removed from the inner wall of the barrel before the bittern storage and transportation device delivers the bittern to be reacted to several barrels next time. This prevents the mixture remaining on the inner wall of the barrel from interfering with the contact between the bittern and alkali solution dispersed on the inner wall of the barrel next time. This allows the bittern and alkali solution dispersed on the inner wall of the barrel to have a large-area contact each time and react to form magnesium hydroxide precipitate.

[0038] The residue removal device is used to drive the barrels to rotate a predetermined angle toward the axis of the reaction tank after the bittern storage and transportation device has transported the bittern to be reacted to several barrels several times, so that the mixture in the barrel can be removed from the barrel and fall onto the receiving filter screen; the receiving filter screen is used to receive and filter the mixture after the residue removal device removes the mixture from the barrel.

[0039] The re-dispersing drive device is used to drive the receiving filter screen to reciprocate up and down before the receiving filter screen receives the mixture from the barrel. This allows the magnesium hydroxide precipitate to repeatedly detach from the receiving filter screen while it receives the mixture from the barrel, enabling the filtrate to pass through quickly and completely. This prevents the mixture from detaching from the barrel from accumulating on the receiving filter screen, which would hinder the filtration speed of the receiving filter screen. It also prevents the magnesium hydroxide precipitate from obstructing the rapid and complete passage of the filtrate and prevents the magnesium hydroxide precipitate from clumping and adhering to the receiving filter screen. This ensures that the mixture from the barrel received by the receiving filter screen is filtered efficiently and thoroughly, preventing the filtrate from entering the solid plastic outlet pipe and being discharged. This achieves complete separation of the filtrate and the magnesium hydroxide precipitate.

[0040] The re-dispersing drive device is used to drive the receiving filter screen to move up and down repeatedly after the filtrate has completely passed through, causing the magnesium hydroxide precipitate on the receiving filter screen to be shaken repeatedly. This disperses the magnesium hydroxide precipitate after the filtrate has completely passed through the receiving filter screen and allows it to enter the solid plastic outlet pipe. This prevents the magnesium hydroxide precipitate from clumping together before entering the solid plastic outlet pipe and clogging it. It ensures that the magnesium hydroxide precipitate on the receiving filter screen can be stably, continuously, and completely discharged through the solid plastic outlet pipe to the outside of the tank. This prevents the magnesium hydroxide precipitate from hindering the filtration efficiency and quality of the mixture leaving the tank by the receiving filter screen in the next batch, ensuring that the receiving filter screen can efficiently and fully filter the mixture leaving the tank each time.

[0041] The liquid outlet pipe is used to discharge the filtrate that has passed through the filter screen to the outside of the reaction tank, and the solid plastic outlet pipe is used to discharge the magnesium hydroxide precipitate to the outside of the reaction tank; the magnesium hydroxide precipitate discharged through the solid plastic outlet pipe is washed and dried to obtain agricultural magnesium hydroxide.

[0042] In summary: This method allows for large-area contact and reaction of bittern and alkali solutions to generate a large amount of magnesium hydroxide precipitate, followed by a thorough and efficient reaction of the already contacted bittern and alkali solutions to produce the precipitate. It also prevents the magnesium hydroxide precipitate from being difficult to remove from the reaction equipment and avoids incomplete washing and inefficient drying of the precipitate. Furthermore, it prevents the magnesium hydroxide precipitate from clumping within the reaction equipment. After the bittern and alkali solutions react, it accelerates the filtration of the magnesium hydroxide precipitate, prevents it from hindering the rapid and complete passage of the filtrate, prevents the precipitate from clumping and adhering to the reaction equipment, and achieves complete separation of the filtrate and the magnesium hydroxide precipitate.

[0043] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0044] It should be understood that the above summary and the following detailed description of the invention are exemplary and explanatory, and are intended to provide further explanation of the invention as claimed. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of the present invention.

[0046] Figure 2 For the corresponding Figure 1 sectional view of .

[0047] Figure 3 For the corresponding Figure 2 Enlarged view of part A.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Reaction tank; 2. Barrel body; 3. Anti-bubbling rod; 4. Dispersing and foaming plate; 5. Liquid outlet pipe; 6. Solid plastic outlet pipe; 7. Filter screen; 8. Re-detachment and dispersing rope; 9. Connecting frame; 10. Rotating shaft; 11. First rotating motor; 12. Linkage rod; 13. Second rotating motor; 14. Sealing ring; 15. Connecting plate; 16. Telescopic component; 17. Third rotating motor; 18. Limiting ring; 19. Bittern conveying pipe; 20. Bittern storage tank; 21. Bittern connecting pipe; 22. Alkali conveying pipe; 23. Alkali storage tank; 24. Alkali connecting pipe; 25. Heating device; 26. Bittern connecting pipe; 27. Alkali connecting pipe. Detailed Implementation

[0050] To facilitate understanding by those skilled in the art, the structure of the present invention will now be described in further detail with reference to the accompanying drawings:

[0051] refer to Figure 1-3 A reaction apparatus, comprising:

[0052] A reaction tank 1 is provided with a bittern storage and conveying device and an alkali storage and conveying device on its top surface. Several barrels 2 are arranged around the inside of the reaction tank 1. The barrels 2 are rotatably mounted on the reaction tank 1. A residue removal device is provided between the barrels 2 and the reaction tank 1. A charging-reverse anti-bulking rod 3 is rotatably mounted at the bottom inside the barrel 2. The axis of the charging-reverse anti-bulking rod 3 intersects and is perpendicular to the axis of the reaction tank 1. A charging-reverse anti-bulking driving device is provided between the barrels 2 and the charging-reverse anti-bulking rod 3. A dispersing foam-producing plate 4 is raised and lowered inside the barrel 2 and above the charging-reverse anti-bulking rod 3. A dispersing foam-producing driving device is provided between the barrel 2 and the dispersing foam-producing plate 4.

[0053] The liquid outlet pipe 5 is connected to the bottom surface of the reaction tank 1 and located between several barrels 2; the solid plastic outlet pipe 6 has its bottom end extending out of the bottom surface of the reaction tank 1 and located on one side of the liquid outlet pipe 5; a receiving filter screen 7 is provided on the outside of the top end of the solid plastic outlet pipe 6; several re-detachment and dispersing ropes 8 are provided between the receiving filter screen 7 and the inner top surface of the reaction tank 1; the re-detachment and dispersing ropes 8 are located between adjacent barrels 2 and on the inner side of the barrels 2; a re-detachment and dispersing driving device is provided between the re-detachment and dispersing ropes 8 and the inner top surface of the reaction tank 1; the outer side of the top surface of the dispersion foaming plate 4 has several through holes; a sealing ring is provided between the solid plastic outlet pipe (6) and the reaction tank (1);

[0054] The bittern is pretreated by purification and dilution and then stored in a bittern storage and transportation device. The bittern storage and transportation device is used to store the pretreated bittern to be reacted and to periodically and evenly distribute the bittern to be reacted into several tanks 2, with the bittern to be reacted falling vertically into each tank 2. The alkali storage and transportation device is used to store alkali solution and to evenly distribute alkali solution into several tanks 2 at a predetermined flow rate during the period when the bittern storage and transportation device is distributing the bittern to be reacted into several tanks 2, with the alkali solution falling vertically into each tank 2.

[0055] The dispersion foaming plate 4 is used to be driven to move up and down repeatedly during the transportation of the bitter brine to be reacted to several barrels 2 in the bitter brine storage and transportation device, so as to disperse the bitter brine and alkaline solution that fall vertically into the barrel 2 and disperse the bitter brine and alkaline solution on the inner wall of the barrel 2, thereby making the bitter brine and alkaline solution come into contact with a large area on the inner wall of the barrel 2 and react in large quantities to generate magnesium hydroxide precipitate.

[0056] The anti-clumping rod 3 is used to rotate periodically during the transportation of the bittern to be reacted to several tanks 2 in the bittern storage and transportation device, so as to periodically disturb the mixture at the bottom of the tank 2, thereby allowing the bittern and alkaline solution that have been in contact with each other on the inner wall of the tank 2 to fully and efficiently react at the bottom of the tank 2 to generate magnesium hydroxide precipitate, so as to prevent the generated magnesium hydroxide precipitate from clumping at the bottom of the tank 2, thereby preventing the magnesium hydroxide precipitate from being difficult to detach from the tank 2 in the future, and preventing incomplete washing and low drying efficiency of the magnesium hydroxide precipitate in the future.

[0057] The dispersion bubble-generating plate 4 is driven to reciprocate up and down before the bittern to be reacted is transported to several barrels 2 by the bittern storage and transportation device. This causes the mixture located above the charging anti-agglomeration rod 3 to generate bubbles before the bittern to be reacted is transported to several barrels 2 by the bittern storage and transportation device. This makes it difficult for the magnesium hydroxide precipitate generated on the inner wall of the barrel 2 to agglomerate when it falls onto the surface of the mixture. This also makes it difficult for the magnesium hydroxide precipitate generated on the inner wall of the barrel 2 to agglomerate with the magnesium hydroxide precipitate at the bottom of the barrel 2 after it falls onto the surface of the mixture.

[0058] The charging-reverse anti-bulking driving device is used to drive the charging-reverse anti-bulking rod 3 to move, and the dispersion foaming driving device is used to drive the dispersion foaming plate 4 to move.

[0059] The residue removal device is used to drive the barrels 2 to rotate back and forth before the bittern storage and transportation device delivers the bittern to be reacted to the barrels 2 next time. This allows the mixture remaining on the inner wall of the barrels 2 to be removed from the inner wall of the barrels 2 before the bittern storage and transportation device delivers the bittern to be reacted to the barrels 2 next time. This prevents the mixture remaining on the inner wall of the barrels 2 from interfering with the contact between the bittern and alkali solution dispersed on the inner wall of the barrels 2 next time. This allows the bittern and alkali solution dispersed on the inner wall of the barrels 2 to have a large-area contact each time and react to generate magnesium hydroxide precipitate.

[0060] The residue removal device is used to drive the barrels 2 to rotate a predetermined angle toward the axis of the reaction tank 1 after the bittern storage and transportation device has transported the bittern to be reacted to several barrels 2 several times, so that the mixture in the barrel 2 can be removed from the barrel 2 and fall onto the receiving filter screen 7; the receiving filter screen 7 is used to receive and filter the mixture after the residue removal device removes the mixture in the barrel 2 from the barrel 2.

[0061] The re-detachment and dispersing drive device is used to drive the receiving filter screen 7 to reciprocate up and down before receiving the mixture from the tank 2. This allows the magnesium hydroxide precipitate to repeatedly detach from the receiving filter screen 7 while receiving the mixture from the tank 2, enabling the filtrate to pass through quickly and completely. This prevents the mixture from the tank 2 from accumulating on the receiving filter screen 7, which would hinder the filtration speed of the receiving filter screen 7. It also prevents the magnesium hydroxide precipitate from hindering the rapid and complete passage of the filtrate, and prevents the magnesium hydroxide precipitate from clumping and adhering to the receiving filter screen 7. This ensures that the mixture from the tank 2 received by the receiving filter screen 7 is filtered efficiently and thoroughly, preventing the filtrate from entering the solid plastic outlet pipe 6 and being discharged. This achieves complete separation of the filtrate and the magnesium hydroxide precipitate.

[0062] The re-dispersing drive device is used to drive the receiving filter screen 7 to move up and down repeatedly after the filtrate has completely passed through, so that the magnesium hydroxide precipitate on the receiving filter screen 7 is shaken repeatedly. This disperses the magnesium hydroxide precipitate after the filtrate has completely passed through the receiving filter screen 7 and allows it to enter the solid plastic outlet pipe 6. This prevents the magnesium hydroxide precipitate from clumping together before entering the solid plastic outlet pipe 6 and clogging it. It ensures that the magnesium hydroxide precipitate on the receiving filter screen 7 can be stably, continuously, and completely discharged through the solid plastic outlet pipe 6 to the outside of the tank 2. This prevents the magnesium hydroxide precipitate from hindering the filtration efficiency and quality of the mixture leaving the tank 2 by the receiving filter screen 7 in the next filtration, and ensures that the receiving filter screen 7 can efficiently and fully filter the mixture leaving the tank 2 each time.

[0063] The liquid outlet pipe 5 is used to discharge the filtrate that passes through the filter screen 7 to the outside of the reaction tank 1, and the solid plastic outlet pipe 6 is used to discharge the magnesium hydroxide precipitate to the outside of the reaction tank 1; the magnesium hydroxide precipitate discharged through the solid plastic outlet pipe 6 is washed and dried to obtain agricultural magnesium hydroxide.

[0064] The residue removal device includes a connecting frame 9, which is disposed on the inner wall of the reaction tank 1 and located below the barrel 2. A rotating shaft 10 is rotatably disposed on the connecting frame 9, and a first rotating motor 11 is disposed on the connecting frame 9 and is connected to the rotating shaft 10 in a transmission manner. A linkage rod 12 is disposed between the bottom end face of the barrel 2 and the rotating shaft 10.

[0065] The anti-reverse charging and anti-clogging driving device includes a second rotating motor 13, which is disposed on the outer surface of the barrel 2. The rotating end of the second rotating motor 13 passes through the barrel 2 and is fixedly connected to the anti-reverse charging and anti-clogging rod 3. The rotating end of the second rotating motor 13 is connected to the barrel 2 through a sealing ring 14.

[0066] The dispersion foaming drive device includes two symmetrically arranged connecting plates 15, which are located at the top inside of the barrel 2. The connecting plates 15 are provided with telescopic members 16, and the telescopic ends of the telescopic members 16 are connected to the dispersion foaming plate 4.

[0067] The re-debonding and dispersing drive device includes a third rotating motor 17, which is located on the inner top surface of the reaction tank 1 and above the re-debonding and dispersing rope 8. The rotating end of the third rotating motor 17 is provided with two limiting rings 18, and the re-debonding and dispersing rope 8 is connected to the rotating end of the third rotating motor 17 and located between the two limiting rings 18.

[0068] The bittern storage and transportation device includes several bittern pipelines 19, which are located on the inner top surface of the reaction tank 1 and directly above the barrel 2. A bittern storage tank 20 is provided on the top surface of the reaction tank 1. A bittern connecting pipe 21 with a solenoid valve is provided between the bittern storage tank 20 and the bittern pipelines 19. Several bittern connecting pipes 21 are connected to the bittern storage tank 20 through bittern connecting pipes 26.

[0069] The alkali storage and transportation device includes several alkali delivery pipes 22, which are located on the inner top surface of the reaction tank 1 and directly above the tank body 2. An alkali storage tank 23 is provided on the top surface of the reaction tank 1. An alkali connection pipe 24 with a solenoid valve is provided between the alkali storage tank 23 and the alkali delivery pipes 22. Several alkali connection pipes 24 are connected to the alkali storage tank 23 through alkali connecting pipes 27.

[0070] A heating device 25 is provided inside the bottom of the barrel 2; the heating device 25 is used to heat the bitter brine to be reacted to a predetermined temperature during the transport of the bitter brine to be reacted to several barrels 2 in the bitter brine storage and transport device, so as to accelerate the reaction of the bitter brine and alkaline solution that have been in contact with each other on the inner wall of the barrel 2 to generate magnesium hydroxide precipitate at the bottom of the barrel 2.

[0071] The heating device 25 is a semiconductor heating element or other type. The inner wall of the barrel 2 is smooth and has a heat-conducting function. The reaction tank 1 has a regular polygonal structure, and the receiving filter 7 is a polytetrafluoroethylene fiber filter. The components on the reaction equipment are treated with anti-corrosion measures.

[0072] A method for producing agricultural magnesium hydroxide includes the following steps:

[0073] The bittern is pretreated by purification and dilution and stored in a bittern storage and transportation device; the bittern storage and transportation device periodically and evenly distributes the bittern to be reacted into several tanks 2, and the bittern to be reacted falls vertically into each tank 2; the alkali solution storage and transportation device distributes alkali solution into several tanks 2 at a predetermined flow rate during the period when the bittern storage and transportation device distributes the bittern to be reacted into several tanks 2, and the alkali solution falls vertically into each tank 2.

[0074] During the transport of the bittern to be reacted to several barrels 2 in the bittern storage and transport device, the dispersion foaming plate 4 is driven to move up and down repeatedly to disperse the bittern and alkali solution that fall vertically into the barrel 2 and allow the bittern and alkali solution to be dispersed on the inner wall of the barrel 2.

[0075] During the transport of the bittern to be reacted to several tanks 2 in the bittern storage and transport device, the anti-agglomeration rod 3 is driven to rotate periodically to periodically disturb the mixture at the bottom of the tank 2, so as to prevent the magnesium hydroxide precipitate that has been generated from agglomerating at the bottom of the tank 2.

[0076] In the next step of the bittern storage and transportation device, the dispersion and foaming plate 4 is driven to move up and down repeatedly before the bittern to be reacted is transported to several barrels 2, so as to beat the mixture located above the charging and anti-bubbling rod 3 to generate bubbles.

[0077] Before the bittern storage and transportation device delivers the bittern to be reacted to several barrels 2, the residue removal device drives the barrels 2 to rotate back and forth so that the mixture remaining on the inner wall of the barrels 2 can be removed from the inner wall of the barrels 2 before the bittern storage and transportation device delivers the bittern to be reacted to several barrels 2.

[0078] After the bittern to be reacted is transported several times to several barrels 2 by the bittern storage and transportation device, the residue removal device drives the barrel 2 to rotate at a predetermined angle toward the axis of the reaction tank 1 so that the mixture in the barrel 2 is removed from the barrel 2 and falls onto the receiving filter screen 7; after the residue removal device removes the mixture in the barrel 2 from the barrel 2, the receiving filter screen 7 receives and filters the mixture.

[0079] Before the receiving filter screen 7 receives the mixture that has separated from the tank 2, the re-dispersing drive device drives the receiving filter screen 7 to rise and fall repeatedly, so that when the receiving filter screen 7 receives the mixture that has separated from the tank 2, the magnesium hydroxide precipitate repeatedly leaves the receiving filter screen 7, allowing the filtrate to pass through quickly and completely.

[0080] After the filtrate has completely passed through the receiving filter screen 7, the re-detachment and dispersing drive device drives the receiving filter screen 7 to move up and down repeatedly, causing the magnesium hydroxide precipitate on the receiving filter screen 7 to be shaken repeatedly, so that after the filtrate has completely passed through the receiving filter screen 7, the magnesium hydroxide precipitate is dispersed and detached from the receiving filter screen 7 and enters the solid plastic tube 6.

[0081] The liquid outlet pipe 5 allows the filtrate passing through the filter screen 7 to be discharged to the outside of the reaction tank 1, and the solid plastic outlet pipe 6 is used to discharge the magnesium hydroxide precipitate to the outside of the reaction tank 1; the magnesium hydroxide precipitate discharged through the solid plastic outlet pipe 6 is washed and dried to obtain agricultural magnesium hydroxide.

[0082] It should be noted that any reference signs placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0083] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0084] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0085] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A reaction apparatus, characterized in that: include: A reaction tank (1) is provided with a bittern storage and conveying device and an alkali storage and conveying device on the top surface of the reaction tank (1). Several barrels (2) are arranged around the inside of the reaction tank (1). The barrels (2) are rotatably arranged on the reaction tank (1). A residue removal device is provided between the barrels (2) and the reaction tank (1). A charging anti-bulking rod (3) is rotatably arranged at the bottom inside the barrel (2). A charging anti-bulking driving device is provided between the barrel (2) and the charging anti-bulking rod (3). A dispersing foaming plate (4) is raised and lowered inside the barrel (2) and above the charging anti-bulking rod (3). A dispersing foaming driving device is provided between the barrel (2) and the dispersing foaming plate (4). The liquid outlet pipe (5) is connected to the bottom end face of the reaction tank (1) and located between several of the barrels (2); the solid plastic outlet pipe (6) has its bottom end extending out of the bottom end face of the reaction tank (1) and located on one side of the liquid outlet pipe (5). A receiving filter screen (7) is provided on the outside of the top end of the solid plastic outlet pipe (6). Several re-detachment and dispersing ropes (8) are provided between the receiving filter screen (7) and the inner top end face of the reaction tank (1). The re-detachment and dispersing ropes (8) are located between adjacent barrels (2) and on the inner side of the barrels (2). A re-detachment and dispersing drive device is provided between the re-detachment and dispersing ropes (8) and the inner top end face of the reaction tank (1). The dispersion foaming plate (4) is driven to move up and down repeatedly during the process of the bittern storage and transportation device transporting the bittern to be reacted to several barrels (2) to disperse the bittern and alkali liquid falling vertically into the barrel (2) and disperse the bittern and alkali liquid on the inner wall of the barrel (2); the dispersion foaming plate (4) is driven to move up and down repeatedly before the bittern storage and transportation device transports the bittern to be reacted to several barrels (2) again to beat the mixture located above the charging anti-bubbling rod (3) and generate bubbles before the bittern storage and transportation device transports the bittern to be reacted to several barrels (2) again. The re-desorption and dispersing drive device is used to drive the receiving filter (7) to reciprocate up and down before the receiving filter (7) receives the mixture that has separated from the barrel (2), so that the magnesium hydroxide precipitate repeatedly detaches from the receiving filter (7) when the receiving filter (7) receives the mixture that has separated from the barrel (2), allowing the filtrate to pass through quickly and completely; the re-desorption and dispersing drive device is used to drive the receiving filter (7) to reciprocate up and down after the receiving filter (7) has completely passed through, so that the magnesium hydroxide precipitate on the receiving filter (7) is repeatedly shaken, so that the magnesium hydroxide precipitate is dispersed and detached from the receiving filter (7) after the receiving filter (7) has completely passed through, and enters the solid plastic outlet pipe (6).

2. The reaction apparatus according to claim 1, characterized in that: The residue removal device includes a connecting frame (9), which is disposed on the inner wall of the reaction tank (1) and located below the barrel (2). A rotating shaft (10) is rotatably disposed on the connecting frame (9). A first rotating motor (11) is disposed on the connecting frame (9) and is connected to the rotating shaft (10) in a transmission manner. A linkage rod (12) is disposed between the bottom end face of the barrel (2) and the rotating shaft (10).

3. The reaction apparatus according to claim 1, characterized in that: The charging anti-reverse driving device includes a second rotating motor (13) disposed on the outer surface of the barrel (2). The rotating end of the second rotating motor (13) passes through the barrel (2) and is fixedly connected to the charging anti-reverse rod (3). The rotating end of the second rotating motor (13) is connected to the barrel (2) through a sealing ring (14).

4. The reaction apparatus according to claim 1, characterized in that: The dispersion foaming drive device includes two symmetrically arranged connecting plates (15). The connecting plates (15) are located at the top inside of the barrel (2). The connecting plates (15) are provided with telescopic components (16), and the telescopic ends of the telescopic components (16) are connected to the dispersion foaming plate (4).

5. The reaction apparatus according to claim 1, characterized in that: The re-debonding and dispersing drive device includes a third rotating motor (17), which is located on the inner top surface of the reaction tank (1) and above the re-debonding and dispersing rope (8). The rotating end of the third rotating motor (17) is provided with two limiting rings (18). The re-debonding and dispersing rope (8) is connected to the rotating end of the third rotating motor (17) and is located between the two limiting rings (18).

6. The reaction apparatus according to claim 1, characterized in that: The bittern storage and transportation device includes several bittern delivery pipes (19), which are located on the inner top surface of the reaction tank (1) and directly above the barrel body (2). A bittern storage tank (20) is provided on the top surface of the reaction tank (1). A bittern connecting pipe (21) with a solenoid valve is provided between the bittern storage tank (20) and the bittern delivery pipes (19). Several bittern connecting pipes (21) are connected to the bittern storage tank (20) through bittern connecting pipes (26).

7. The reaction apparatus according to claim 1, characterized in that: The alkali storage and transportation device includes several alkali delivery pipes (22). The alkali delivery pipes (22) are located on the inner top surface of the reaction tank (1) and directly above the tank body (2). An alkali storage tank (23) is provided on the top surface of the reaction tank (1). An alkali connection pipe (24) with a solenoid valve is provided between the alkali storage tank (23) and the alkali delivery pipes (22). Several alkali connection pipes (24) are connected to the alkali storage tank (23) through alkali connecting pipes (27).

8. The reaction apparatus according to claim 1, characterized in that: A heating device (25) is provided inside the bottom of the barrel (2); the heating device (25) is used to heat the bitter brine to be reacted to a predetermined temperature during the transport of the bitter brine to several barrels (2) by the bitter brine storage and transport device, so that the bitter brine and alkaline solution that have been in contact with each other on the inner wall of the barrel (2) can react more quickly at the bottom of the barrel (2) to generate magnesium hydroxide precipitate.

9. A method for producing agricultural magnesium hydroxide, characterized in that: A reaction apparatus according to any one of claims 1-8 includes the following steps: The bittern is pretreated by purification and dilution and stored in a bittern storage and transportation device; the bittern storage and transportation device periodically and evenly distributes the bittern to be reacted into several barrels (2), and the bittern to be reacted falls vertically into each barrel (2); the alkali storage and transportation device distributes alkali into several barrels (2) at a predetermined flow rate during the period when the bittern storage and transportation device distributes the bittern to be reacted into several barrels (2), and the alkali falls vertically into each barrel (2); During the process of transporting the bitter brine to be reacted to several barrels (2) in the bitter brine storage and transportation device, the dispersion foaming plate (4) is driven to move up and down repeatedly to disperse the bitter brine and alkali solution that fall vertically into the barrel (2) and allow the bitter brine and alkali solution to be dispersed on the inner wall of the barrel (2). During the transport of the bittern to be reacted to several barrels (2) in the bittern storage and transport device, the anti-agglomeration rod (3) is driven to rotate periodically to periodically disturb the mixture at the bottom of the barrel (2) to prevent the magnesium hydroxide precipitate that has been generated from agglomerating at the bottom of the barrel (2). Before the bittern storage and transportation device delivers the bittern to be reacted to several barrels (2) next time, the dispersion foaming plate (4) is driven to rise and fall repeatedly to beat the mixture located above the charging anti-bubbling rod (3) to generate bubbles. Before the bittern storage and transportation device delivers the bittern to be reacted to several barrels (2) for the next time, the residue removal device drives the barrel (2) to rotate back and forth so that the mixture remaining on the inner wall of the barrel (2) can be removed from the inner wall of the barrel (2) before the bittern storage and transportation device delivers the bittern to be reacted to several barrels (2) for the next time. After the bittern to be reacted is transported several times to several barrels (2) by the bittern storage and transportation device, the residue removal device drives the barrel (2) to rotate at a predetermined angle toward the axis of the reaction tank (1) so that the mixture in the barrel (2) is removed from the barrel (2) and falls onto the receiving filter screen (7); after the residue removal device removes the mixture in the barrel (2) from the barrel (2), the receiving filter screen (7) receives and filters the mixture; Before the receiving filter (7) receives the mixture that has left the tank (2), the re-disintegration drive device drives the receiving filter (7) to rise and fall repeatedly, so that when the receiving filter (7) receives the mixture that has left the tank (2), the magnesium hydroxide precipitate repeatedly leaves the receiving filter (7) so that the filtrate passes through quickly and completely. After the filtrate has completely passed through the receiving filter (7), the re-detachment and dispersing drive device drives the receiving filter (7) to move up and down repeatedly, so that the magnesium hydroxide precipitate on the receiving filter (7) is shaken repeatedly, so that after the filtrate has completely passed through the receiving filter (7), the magnesium hydroxide precipitate is dispersed and detached from the receiving filter (7) and enters the solid plastic tube (6). The liquid outlet pipe (5) allows the filtrate passing through the receiving filter screen (7) to be discharged to the outside of the reaction tank (1), and the solid plastic outlet pipe (6) is used to discharge the magnesium hydroxide precipitate to the outside of the reaction tank (1); the magnesium hydroxide precipitate discharged through the solid plastic outlet pipe (6) is washed and dried to obtain agricultural magnesium hydroxide.

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