Monoammonium phosphate purification device and purification method

Abstract

The invention relates to a monoammonium phosphate purification device and method, and relates to the technical field of purification, the monoammonium phosphate purification device comprises a support table, a stirring cylinder is arranged above the support table, a filter cylinder is arranged on one side of the stirring cylinder, a recovery cylinder is arranged on one side, away from the stirring cylinder, of the filter cylinder, and a connecting pipe is arranged between the stirring cylinder and the filter cylinder; a communicating pipe is arranged between the filtering barrel and the recycling barrel, a purification pump is arranged at the end, close to the stirring barrel, of the connecting pipe, the upper end face of the stirring barrel is communicated with a feeding pipe and a water inlet pipe, a screen is arranged on the feeding pipe, a stirring motor is arranged on the upper end face of the stirring barrel, and an output shaft of the stirring motor penetrates through the stirring barrel and is coaxially and fixedly connected with a stirring shaft; and a plurality of stirring blades are arranged on the stirring shaft. According to the method, the monoammonium phosphate solution is prepared and is directly applied to the production proportioning raw materials, so that the purity of the monoammonium phosphate is improved, the energy consumption is reduced, and the water resource is also saved.

Description

Technical Field

[0001] The present invention relates to the technical field of purification, and in particular to a monoammonium phosphate purification device and a purification method. Background Art

[0002] With the rapid development of the new energy industry, especially the growth of the electric vehicle and energy storage markets, the demand for lithium-ion batteries has surged. As a safe and stable cathode material, lithium iron phosphate (LFP) has become a popular choice in the market. Phosphorus chemical companies have transformed into the new energy industry under this background, mainly due to their advantages in raw materials. In this process, monoammonium phosphate needs to be purified. The traditional method is to purify monoammonium phosphate through multi-stage filtration, then evaporate, concentrate, crystallize and dry to obtain monoammonium phosphate solid, and then carry out subsequent production.

[0003] Related technology can refer to the patent application with publication number CN118873968A, which discloses a processing and purification equipment for cyclopentanone distillation and its process, including a distillation flask and a protective device. The bottom of the distillation flask is provided with a base, the top of the base is fixedly installed with a slide rail, and the inner wall of the slide rail is slidably installed with a driving device; wherein the protective device includes a shunt pipe, a temperature detector, a serpentine condenser, a support plate, a support frame, a heating device, a hollow tube, a pneumatic rod, an L-shaped rod, a hydraulic cylinder, a connecting pipe, a hydraulic rod and a protective cover. The distillation flask is heated by the heating device, and the mixture in the distillation flask is heated to the boiling point of cyclopentanone by heating. The application vaporizes it into steam, and the steam enters the serpentine condenser through the shunt pipe. The driving device slowly descends when the air is slowly discharged to prevent the driving device from descending too fast, causing the distillation flask to splash the liquid inside the heating device and affect the purification environment.

[0004] With regard to the above-mentioned related technologies, there are many steps in the monoammonium phosphate purification process, and it cannot be directly applied to the raw materials for iron phosphate production, which affects the production efficiency. Therefore, a monoammonium phosphate purification device and a purification method are urgently needed to solve the above problems. Summary of the invention

[0005] In order to improve production efficiency, the present invention provides a monoammonium phosphate purification device and a purification method.

[0006] In a first aspect, the present invention provides a monoammonium phosphate purification device, which adopts the following technical solution: A monoammonium phosphate purification device comprises a support platform, a stirring drum is provided above the support platform, a filter drum is provided on one side of the stirring drum, a recovery drum is provided on the side of the filter drum away from the stirring drum, a connecting pipe is provided between the stirring drum and the filter drum, one end of the connecting pipe is connected to the bottom end of the stirring drum, and the other end is connected to the top end of the filter drum, a connecting pipe is provided between the filter drum and the recovery drum, one end of the connecting pipe is connected to the top end of the filter drum, and the other end is connected to the recovery drum, a purification pump is provided at one end of the connecting pipe close to the stirring drum, a feed pipe and a water inlet pipe are connected to the upper end surface of the stirring drum, a screen is provided on the feed pipe, a stirring motor is provided on the upper end surface of the stirring drum, an output shaft of the stirring motor passes through the stirring drum and is coaxially fixedly connected to a stirring shaft, and a plurality of stirring blades are provided on the stirring shaft.

[0007] By adopting the above technical scheme, when it is necessary to purify monoammonium phosphate, the staff first prepares a certain amount of monoammonium phosphate fixed powder and a certain amount of water according to the ratio requirements, and adds them into the mixing drum from the feed pipe and the water inlet pipe respectively. In the process of the monoammonium phosphate fixed powder entering the mixing drum from the feed pipe, the first filtration is achieved through screening, and then the stirring motor is started. The stirring motor drives the stirring shaft to rotate, thereby driving the stirring blades to rotate, so that the monoammonium phosphate and water are fully mixed to form a monoammonium phosphate solution, and then the purification pump is started. The monoammonium phosphate solution enters the filter drum through the connecting pipe, and after further purification and filtration in the filter drum, it enters the recovery drum through the connecting pipe to complete the purification of the monoammonium phosphate, reducing the steps in the purification process, and can be directly applied to the raw materials for the ratio of iron phosphate production, which is beneficial to improving production efficiency.

[0008] Optionally, the mixing drum includes a drum body and a support seat, the drum body is arranged above the support seat, a fixed plate is provided on the side of the support seat close to the mixing drum, the fixed plate is vertically arranged on the support seat, a lifting motor is provided on the upper end surface of the fixed plate, the output shaft of the lifting motor passes through the fixed plate and is coaxially fixedly connected to a lifting screw, the lifting screw is located in the fixed plate, two connecting rods are fixedly connected to the side of the drum body close to the fixed plate, one end of the connecting rod away from the drum body is threadedly connected to the lifting screw, and the drum body is movably connected to the support seat.

[0009] By adopting the above technical solution, when it is necessary to clean the inside of the mixing drum, the staff starts the lifting motor, and the lifting motor drives the lifting screw to rotate, thereby causing the two connecting rods to rise, and then driving the drum to rise, thereby separating the drum from the support seat, making it easier to clean the inside of the mixing drum, so as to subsequently improve subsequent production efficiency.

[0010] Optionally, a circular protrusion is fixedly connected to the upper end surface of the support seat, and an annular groove is provided on the lower end surface of the cylinder. When the cylinder and the support seat are in contact, the circular protrusion is located in the annular groove.

[0011] By adopting the above technical solution, when the support seat is connected to the cylinder, the circular protrusion is located in the annular groove, which improves the connection stability and sealing between the two, which is beneficial to improving the stability of the device.

[0012] Optionally, a rotating column is rotatably connected in the circular protrusion, a rotating motor is provided in the circular protrusion, the output shaft of the rotating motor is coaxially fixedly connected to the rotating column, a plurality of nozzles are provided in the rotating column, the nozzles are inclined and evenly arranged circumferentially, a shielding cover for covering the nozzles is provided on the inner wall of the cylinder, the shielding cover is evenly arranged circumferentially, the shielding cover and the nozzle are arranged one by one, a plurality of connecting grooves for placing the shielding covers are opened on the rotating column, and when the cylinder abuts against the support seat, the shielding cover is located at the connecting groove of the rotating column.

[0013] By adopting the above technical solution, when the cylinder is separated from the support seat and becomes stationary, the shielding cover is separated from the connecting groove, and then the staff starts the rotating motor and the nozzle, and the nozzle will rotate tiltedly to spray the inner wall of the cylinder, thereby clearing the inner wall of the cylinder and avoiding the monoammonium phosphate solution from remaining in the cylinder and affecting the next monoammonium phosphate purification work, which is beneficial to improving the purity of monoammonium phosphate and improving production efficiency.

[0014] Optionally, the upper end surface of the support seat is provided with a rotating wheel, and the lifting screw is coaxially fixedly connected to a driving wheel, the driving wheel meshes with the rotating wheel, the radius of the rotating wheel is larger than the radius of the driving wheel, and the rotating wheel is coaxially fixedly connected to a rotating rod, the end of the rotating rod away from the rotating wheel is rotatably connected to the support seat, and a cleaning rod is fixedly connected to the rotating rod, the cleaning rod is horizontally arranged, and a cleaning brush is provided on the lower end surface of the cleaning rod, the height of the cleaning rod is higher than the height of the support seat, when the cylinder body abuts against the support seat, the cleaning rod is located on the outside of the cylinder body; when the cylinder body and the support seat are gradually separated, the cleaning brush of the cleaning rod is slidably connected to the upper end surface of the support seat.

[0015] By adopting the above technical solution, when the monoammonium phosphate purification is completed and cleaning is required, some sediment may remain on the support seat. When the lifting motor is started to separate the cylinder and the support seat, the lifting screw rotates, synchronously driving the driving wheel to rotate, and then driving the rotating wheel to rotate. The rotating wheel drives the cleaning rod to rotate, so that the bristles on the cleaning rod slide with the upper surface of the support seat, thereby achieving the cleaning of the upper surface of the support seat, which is beneficial to improving the cleaning efficiency.

[0016] Optionally, a filter screen is provided at one end of the connecting tube close to the cylinder, and the filter screen is inserted into the connecting tube from top to bottom. A fixing rod is provided between the cylinder and the filter screen, one end of the fixing rod is fixedly connected to the filter screen, and the other end is fixedly connected to the cylinder.

[0017] By adopting the above technical solution, part of the sediment will flow into the filter cylinder along with the purification pump. At this time, the filter screen will intercept the sediment. When the cylinder body is separated from the support seat, the filter screen will rise with the cylinder body, thereby realizing the separation of the filter screen and the connecting pipe, which is convenient for the subsequent cleaning of the filter screen and is beneficial to improving the cleaning efficiency.

[0018] Optionally, support columns are provided on both sides of the cylinder, the support columns are vertically arranged on the upper end surface of the support platform, heating plates are provided on the support columns, heating sheets are provided on the heating plates, the two heating plates are arranged opposite to each other, and the cylinder is located between the two heating plates.

[0019] By adopting the above technical solution, after the cylinder and the support seat are cleaned, the staff starts the heating plate to dry the cylinder to avoid moisture remaining in the cylinder and affecting the concentration of the subsequent monoammonium phosphate solution, which is beneficial to improving the accuracy of the device.

[0020] Optionally, a circle of sealing ring is fixedly connected to the periphery of the circular protrusion, and a sealing groove is connected to the annular groove. When the cylinder body abuts the support seat, the circular protrusion is located at the annular groove and the sealing ring is located at the sealing groove.

[0021] By adopting the above technical solution, when the cylinder body and the support seat are in contact, the circular protrusion is located at the annular groove and the sealing ring is located at the sealing groove, which further improves the sealing performance between the cylinder body and the support seat, avoids leakage of monoammonium phosphate solution, and is beneficial to improving the safety of the device.

[0022] In a second aspect, the present invention provides a purification method: S1: The staff prepares a certain amount of monoammonium phosphate fixed powder and a certain amount of water according to the ratio requirements, and adds them into the mixing drum from the feed pipe and the water inlet pipe respectively. When the monoammonium phosphate fixed powder enters the mixing drum from the feed pipe, it is filtered for the first time through screening; S2: starting the stirring motor, which drives the stirring shaft to rotate, thereby driving the stirring blades to rotate, so that the monoammonium phosphate and water are fully mixed to form a monoammonium phosphate solution; S3: Start the purification pump, and the monoammonium phosphate solution enters the filter cartridge through the connecting pipe. After further purification and filtration in the filter cartridge, it enters the recovery cartridge through the connecting pipe, completing the purification process of the monoammonium phosphate.

[0023] In summary, the present invention includes at least one of the following beneficial technical effects: 1. By setting a support platform, a mixing drum, a filter drum, a recovery drum, a connecting pipe, a connecting pipe, a purification pump, a stirring shaft and a stirring blade, when the monoammonium phosphate needs to be purified, the staff first prepares a certain amount of monoammonium phosphate fixed powder and a certain amount of water according to the ratio requirements, and adds them into the mixing drum from the feed pipe and the water inlet pipe respectively. In the process of the monoammonium phosphate fixed powder entering the mixing drum from the feed pipe, the first filtration is achieved through screening, and then the stirring motor is started. The stirring motor drives the stirring shaft to rotate, thereby driving the stirring blade to rotate, so that the monoammonium phosphate and water are fully mixed to form a monoammonium phosphate solution, and then the purification pump is started. The monoammonium phosphate solution enters the filter drum through the connecting pipe, and after further purification and filtration in the filter drum, it enters the recovery drum through the connecting pipe to complete the purification of the monoammonium phosphate, reducing the process in the purification process, and can be directly applied to the raw materials for the ratio of iron phosphate production, which is conducive to improving production efficiency; 2. By setting the sealing ring, when the cylinder body and the support seat are in contact, the circular protrusion is located at the annular groove, and the sealing ring is located at the sealing groove, which further improves the sealing performance between the cylinder body and the support seat, avoids leakage of the monoammonium phosphate solution, and is beneficial to improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of a monoammonium phosphate purification device.

[0025] Figure 2 The present invention is a schematic diagram of the cross-sectional structure of a monoammonium phosphate purification device.

[0026] Figure 3 yes Figure 2 Enlarged view of part A.

[0027] Figure 4 yes Figure 2 Magnified view of part B.

[0028] Figure 5 yes Figure 2 Magnified view of part C.

[0029] Description of reference numerals: 1, support platform; 11, mixing drum; 111, drum body; 112, support seat; 113, circular protrusion; 114, annular groove; 115, sealing ring; 116, sealing groove; 12, filter drum; 13, recovery drum; 14, connecting pipe; 15, connecting pipe; 16, fixing plate; 161, lifting motor; 162, lifting screw; 163, connecting rod; 17, filter screen; 18, fixing rod; 19, support column; 191. Heating plate; 192. Heating sheet; 2. Purification filter; 21. Purification pump; 22. Stirring motor; 23. Feed pipe; 24. Water inlet pipe; 25. Screen; 26. Stirring shaft; 27. Stirring blade; 3. Cleaning part; 31. Rotating column; 32. Rotating motor; 33. Spray pipe; 34. Shielding cover; 35. Blocking net; 36. Rotating wheel; 37. Driving wheel; 38. Rotating rod; 39. Cleaning rod; 391. Cleaning brush. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with all the accompanying drawings.

[0031] The embodiment of the present invention discloses a monoammonium phosphate purification device.

[0032] Reference Figures 1 to 5 A monoammonium phosphate purification device includes a support platform 1, a purification filter element 2 and a cleaning element 3, wherein the purification filter element 2 is arranged on the support platform 1, and the cleaning element 3 is connected to the purification filter element 2. The support platform 1 supports the components of the device, the purification filter element 2 stirs, purifies and filters the monoammonium phosphate solid powder and water to improve the purity of the monoammonium phosphate solution, and the cleaning element 3 cleans the purification filter element 2.

[0033] Reference Figures 1 to 5 A stirring drum 11 is provided on the support platform 1, a filter drum 12 is provided on one side of the stirring drum 11, a recovery drum 13 is provided on the side of the filter drum 12 away from the stirring drum 11, a connecting pipe 14 is provided between the stirring drum 11 and the filter drum 12, one end of the connecting pipe 14 is connected to the bottom end of the stirring drum 11, and the other end is connected to the top end of the filter drum 12, a connecting pipe 15 is provided between the filter drum 12 and the recovery drum 13, one end of the connecting pipe 15 is connected to the top end of the filter drum 12, and the other end is connected to the recovery drum 13. The stirring drum 11 stirs the stock solution, the filter drum 12 filters out small molecular impurities in the stock solution, and the recovery drum 13 recovers the purified stock solution.

[0034] Reference Figures 1 to 5The purification filter element 2 includes a purification pump 21 and a stirring motor 22. The purification pump 21 is arranged at one end of the connecting pipe 14 close to the stirring drum 11. The upper end surface of the stirring drum 11 is connected with a feed pipe 23 and a water inlet pipe 24. A screen 25 is provided on the feed pipe 23. The stirring motor 22 is vertically arranged on the upper end surface of the stirring drum 11. The output shaft of the stirring motor 22 passes through the stirring drum 11 and is coaxially fixedly connected with a stirring shaft 26. A plurality of stirring blades 27 are provided on the stirring shaft 26.

[0035] Reference Figures 1 to 5 When it is necessary to purify monoammonium phosphate, the staff first prepares a certain amount of monoammonium phosphate fixed powder and a certain amount of water according to the ratio requirements, and adds them into the mixing drum 11 from the feed pipe 23 and the water inlet pipe 24 respectively. In the process of the monoammonium phosphate fixed powder entering the mixing drum 11 from the feed pipe 23, the first filtration is achieved through screening, and then the stirring motor 22 is started. The stirring motor 22 drives the stirring shaft 26 to rotate, thereby driving the stirring blade 27 to rotate, so that the monoammonium phosphate and the water are fully mixed to form a monoammonium phosphate solution, and then the purification pump 21 is started. The monoammonium phosphate solution enters the filter drum 12 through the connecting pipe 14, and after further purification and filtration in the filter drum 12, it enters the recovery drum 13 through the connecting pipe 15, completing the purification process of the monoammonium phosphate, reducing the steps in the purification process, and can be directly applied to the raw materials for the ratio of iron phosphate production, which is beneficial to improving production efficiency.

[0036] Reference Figures 1 to 5 The mixing drum 11 includes a barrel 111 and a support seat 112. The barrel 111 is arranged above the support seat 112. A fixing plate 16 is provided on the side of the support seat 112 close to the mixing drum 11. The fixing plate 16 is vertically arranged on the support seat 112. A lifting motor 161 is provided on the upper end surface of the fixing plate 16. The output shaft of the lifting motor 161 passes through the fixing plate 16 and is coaxially fixedly connected with a lifting screw 162. The lifting screw 162 is located in the fixing plate 16. Two connecting rods 163 are fixedly connected to one side of the barrel 111 close to the fixing plate 16. One end of the connecting rod 163 away from the barrel 111 is threadedly connected to the lifting screw 162. The barrel 111 is movably connected to the support seat 112. When it is necessary to clean the inside of the mixing drum 11, the staff starts the lifting motor 161, and the lifting motor 161 drives the lifting screw 162 to rotate, so that the two connecting rods 163 rise, and then drive the barrel 111 to rise, so as to separate the barrel 111 from the support seat 112, which is convenient for cleaning the inside of the mixing drum 11, so as to improve the subsequent production efficiency.

[0037] Reference Figures 1 to 5A filter screen 17 is provided at one end of the connecting pipe 14 close to the cylinder 111. The filter screen 17 is inserted into the connecting pipe 14 from top to bottom. A fixing rod 18 is provided between the cylinder 111 and the filter screen 17. One end of the fixing rod 18 is fixedly connected to the filter screen 17, and the other end is fixedly connected to the cylinder 111. Part of the sediment will flow into the filter cylinder 12 along with the purification pump 21. At this time, the filter screen 17 intercepts the sediment. When the cylinder 111 is separated from the support seat 112, the filter screen 17 will rise with the cylinder 111, thereby realizing the separation of the filter screen 17 from the connecting pipe 14, facilitating the subsequent cleaning of the filter screen 17, and helping to improve the cleaning efficiency.

[0038] Reference Figures 1 to 5 A circular protrusion 113 is fixedly connected to the upper end surface of the support seat 112, and an annular groove 114 is opened on the lower end surface of the cylinder 111. When the cylinder 111 abuts against the support seat 112, the circular protrusion 113 is located in the annular groove 114, and a circle of sealing ring 115 is fixedly connected to the periphery of the circular protrusion 113. The annular groove 114 is connected with a sealing groove 116. When the cylinder 111 abuts against the support seat 112, the circular protrusion 113 is located in the annular groove 114, and the sealing ring 115 is located in the sealing groove 116.

[0039] Reference Figures 1 to 5 When the cylinder 111 abuts against the support seat 112, the circular protrusion 113 is located at the annular groove 114, and the sealing ring 115 is located at the sealing groove 116, which further improves the sealing performance between the cylinder 111 and the support seat 112, avoids leakage of the monoammonium phosphate solution, and is beneficial to improving the safety of the device.

[0040] Reference Figures 1 to 5 The cleaning member 3 includes a rotating column 31, a rotating motor 32 and a plurality of nozzles 33. The rotating column 31 is rotatably connected to the circular protrusion 113, the rotating motor 32 is arranged in the circular protrusion 113, the output shaft of the rotating motor 32 is coaxially fixedly connected to the rotating column 31, and a plurality of nozzles 33 are arranged in the rotating column 31. The nozzles 33 are inclined and evenly arranged in the circumferential direction. A shielding cover 34 for covering the nozzles 33 is provided on the inner wall of the cylinder 111. The shielding cover 34 is evenly arranged in the circumferential direction, and the shielding cover 34 is arranged one by one with the nozzles 33. A plurality of connecting grooves for placing the shielding cover 34 are opened on the rotating column 31. When the cylinder 111 abuts against the support seat 112, the shielding cover 34 is located at the connecting groove of the rotating column 31. The end of the nozzle 33 close to the cylinder 111 is also provided with a plurality of retaining nets 35 to prevent sediment from entering the spray tank.

[0041] Reference Figures 1 to 5When the cylinder 111 is separated from the support seat 112 and becomes stationary, the shielding cover 34 is separated from the connecting groove, and then the staff starts the rotating motor 32 and the nozzle 33. The nozzle 33 will rotate tiltedly to spray the inner wall of the cylinder 111, thereby cleaning the inner wall of the cylinder 111 and preventing the monoammonium phosphate solution from remaining in the cylinder 111 and affecting the next monoammonium phosphate purification work, which is beneficial to improving the purity of the monoammonium phosphate and improving production efficiency.

[0042] Reference Figures 1 to 5 The upper end surface of the support seat 112 is provided with a rotating wheel 36, and the lifting screw 162 is coaxially fixedly connected with a driving wheel 37, the driving wheel 37 is meshed with the rotating wheel 36, the radius of the rotating wheel 36 is larger than the radius of the driving wheel 37, and the rotating wheel 36 is coaxially fixedly connected with a rotating rod 38, and the end of the rotating rod 38 away from the rotating wheel 36 is rotatably connected to the support seat 112, and a cleaning rod 39 is fixedly connected to the rotating rod 38, the cleaning rod 39 is horizontally arranged, and a cleaning brush 391 is provided on the lower end surface of the cleaning rod 39, the height of the cleaning rod 39 is higher than the height of the support seat 112, when the cylinder 111 is in contact with the support seat 112, the cleaning rod 39 is located on the outside of the cylinder 111; when the cylinder 111 and the support seat 112 are gradually separated, the cleaning brush 391 of the cleaning rod 39 is slidably connected to the upper end surface of the support seat 112.

[0043] Reference Figures 1 to 5 When the monoammonium phosphate purification is completed and cleaning is required, some sediment may remain on the support seat 112. When the lifting motor 161 is started to separate the cylinder 111 and the support seat 112, the lifting screw 162 rotates, synchronously driving the driving wheel 37 to rotate, and then driving the rotating wheel 36 to rotate. The rotating wheel 36 drives the cleaning rod 39 to rotate, so that the bristles on the cleaning rod 39 slide with the upper surface of the support seat 112, thereby realizing the cleaning of the upper surface of the support seat 112, which is beneficial to improving the cleaning efficiency.

[0044] Reference Figures 1 to 5 , support columns 19 are arranged on both sides of the cylinder 111, and the support columns 19 are vertically arranged on the upper end surface of the support platform 1. A heating plate 191 is arranged on the support column 19, and a heating sheet 192 is arranged on each heating plate 191. The two heating plates 191 are arranged opposite to each other, and the cylinder 111 is located between the two heating plates 191. After the cylinder 111 and the support seat 112 are cleaned, the staff starts the heating sheet 192 to dry the cylinder 111 to avoid moisture remaining in the cylinder 111 and affecting the concentration of the subsequent monoammonium phosphate solution, which is conducive to improving the accuracy of the device.

[0045] The present invention also discloses a purification method: S1: The staff prepares a certain amount of monoammonium phosphate fixed powder and a certain amount of water according to the ratio requirements, and adds them into the mixing drum 11 from the feed pipe 23 and the water inlet pipe 24 respectively. When the monoammonium phosphate fixed powder enters the mixing drum 11 from the feed pipe 23, it is filtered for the first time through screening; S2: starting the stirring motor 22, the stirring motor 22 drives the stirring shaft 26 to rotate, thereby driving the stirring blade 27 to rotate, so that the monoammonium phosphate and water are fully mixed to form a monoammonium phosphate solution; S3: Start the purification pump 21, and the monoammonium phosphate solution enters the filter cartridge 12 through the connecting pipe 14, and after further purification and filtration in the filter cartridge 12, enters the recovery cartridge 13 through the connecting pipe 15, thereby completing the purification process of the monoammonium phosphate.

[0046] The implementation principle of a monoammonium phosphate purification device and a purification method according to an embodiment of the present invention is as follows: when monoammonium phosphate purification is required, the staff first prepares a certain amount of monoammonium phosphate fixed powder and a certain amount of water according to the ratio requirements, and adds them into the mixing drum 11 from the feed pipe 23 and the water inlet pipe 24 respectively. In the process of the monoammonium phosphate fixed powder entering the mixing drum 11 from the feed pipe 23, the first filtration is achieved through screening, and then the stirring motor 22 is started. The stirring motor 22 drives the stirring shaft 26 to rotate, thereby driving the stirring blade 27 to rotate, so that the monoammonium phosphate and the water are fully mixed to form a monoammonium phosphate solution, and then the purification pump 21 is started. The monoammonium phosphate solution enters the filter drum 12 through the connecting pipe 14, and after further purification and filtration in the filter drum 12, it enters the recovery drum 13 through the connecting pipe 15, completing the purification treatment of the monoammonium phosphate, reducing the steps in the purification process, and can be directly applied to the raw materials for the ratio of iron phosphate production, which is beneficial to improving production efficiency.

[0047] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A monoammonium phosphate purification device, comprising a support platform (1), characterized in that: A mixing drum (11) is provided above the support platform (1), a filter drum (12) is provided on one side of the mixing drum (11), a recovery drum (13) is provided on the side of the filter drum (12) away from the mixing drum (11), a connecting pipe (14) is provided between the mixing drum (11) and the filter drum (12), one end of the connecting pipe (14) is connected to the bottom end of the mixing drum (11), and the other end is connected to the top end of the filter drum (12), a connecting pipe (15) is provided between the filter drum (12) and the recovery drum (13), one end of the connecting pipe (15) is connected to the filter drum (12), and the recovery drum (13) has a plurality of connecting pipes (15) connected to the filter drum (11). The top of the connecting pipe (14) is connected to the mixing drum (12), and the other end is connected to the recovery drum (13). The end of the connecting pipe (14) close to the mixing drum (11) is provided with a purification pump (21). The upper end surface of the mixing drum (11) is connected to a feed pipe (23) and a water inlet pipe (24). The feed pipe (23) is provided with a screen (25). The upper end surface of the mixing drum (11) is provided with a stirring motor (22). The output shaft of the stirring motor (22) passes through the mixing drum (11) and is coaxially fixedly connected to a stirring shaft (26). The stirring shaft (26) is provided with a plurality of stirring blades (27).

2. A monoammonium phosphate purification device according to claim 1, characterized in that: The mixing drum (11) comprises a drum body (111) and a support seat (112). The drum body (111) is arranged above the support seat (112). A fixing plate (16) is provided on a side of the support seat (112) close to the mixing drum (11). The fixing plate (16) is vertically arranged on the support seat (112). A lifting motor (161) is provided on an upper end surface of the fixing plate (16). An output shaft of the lifting motor (161) passes through the fixing plate (16) and is coaxially fixedly connected to a lifting screw (162). The lifting screw (162) is located in the fixing plate (16). Two connecting rods (163) are fixedly connected to a side of the drum body (111) close to the fixing plate (16). One end of the connecting rod (163) away from the drum body (111) is threadedly connected to the lifting screw (162). The drum body (111) and the support seat (112) are movably connected.

3. A monoammonium phosphate purification device according to claim 2, characterized in that: The upper end surface of the support seat (112) is fixedly connected with a circular protrusion (113), and the lower end surface of the cylinder (111) is provided with an annular groove (114). When the cylinder (111) and the support seat (112) are in contact, the circular protrusion (113) is located at the annular groove (114).

4. A monoammonium phosphate purification device according to claim 3, characterized in that: A rotating column (31) is rotatably connected in the circular protrusion (113), a rotating motor (32) is provided in the circular protrusion (113), an output shaft of the rotating motor (32) is coaxially fixedly connected to the rotating column (31), a plurality of nozzles (33) are provided in the rotating column (31), the nozzles (33) are inclinedly arranged, and the nozzles (33) are evenly arranged in the circumferential direction, a shielding cover (34) for covering the nozzles (33) is provided on the inner wall of the cylinder (111), the shielding cover (34) is evenly arranged in the circumferential direction, and the shielding cover (34) and the nozzles (33) are arranged one by one, and a plurality of connecting grooves for accommodating the shielding covers (34) are provided on the rotating column (31), and when the cylinder (111) is in contact with the support seat (112), the shielding cover (34) is located at the connecting groove of the rotating column (31).

5. A monoammonium phosphate purification device according to claim 2, characterized in that: The upper end surface of the support seat (112) is provided with a rotating wheel (36), and the lifting screw (162) is coaxially fixedly connected to a driving wheel (37), the driving wheel (37) meshes with the rotating wheel (36), the radius of the rotating wheel (36) is larger than the radius of the driving wheel (37), and the rotating wheel (36) is coaxially fixedly connected to a rotating rod (38), the end of the rotating rod (38) away from the rotating wheel (36) is rotatably connected to the support seat (112), and the rotating rod (38) is fixedly connected to a cleaning rod (38). The cleaning rod (39) is arranged horizontally, and a cleaning brush (391) is arranged on the lower end surface of the cleaning rod (39). The height of the cleaning rod (39) is higher than the height of the support seat (112). When the cylinder (111) and the support seat (112) are in contact, the cleaning rod (39) is located outside the cylinder (111); when the cylinder (111) and the support seat (112) are gradually separated, the cleaning brush (391) of the cleaning rod (39) is slidably connected to the upper end surface of the support seat (112).

6. A monoammonium phosphate purification device according to claim 2, characterized in that: A filter screen (17) is provided at one end of the connecting pipe (14) close to the cylinder (111); the filter screen (17) is inserted into the connecting pipe (14) from top to bottom; a fixing rod (18) is provided between the cylinder (111) and the filter screen (17); one end of the fixing rod (18) is fixedly connected to the filter screen (17) and the other end is fixedly connected to the cylinder (111).

7. A monoammonium phosphate purification device according to claim 2, characterized in that: Support columns (19) are provided on both sides of the cylinder (111), the support columns (19) are vertically arranged on the upper end surface of the support platform (1), a heating plate (191) is provided on the support columns (19), and a heating sheet (192) is provided on each of the heating plates (191), the two heating plates (191) are arranged opposite to each other, and the cylinder (111) is located between the two heating plates (191).

8. A monoammonium phosphate purification device according to claim 3, characterized in that: A sealing ring (115) is fixedly connected to the periphery of the circular protrusion (113), and a sealing groove (116) is connected to the annular groove (114). When the cylinder (111) and the support seat (112) are in contact, the circular protrusion (113) is located at the annular groove (114), and the sealing ring (115) is located at the sealing groove (116).

9. A purification method, applied to a monoammonium phosphate purification device as claimed in any one of claims 1 to 8, comprising the following steps: S1: The staff prepares a certain amount of monoammonium phosphate fixed powder and a certain amount of water according to the required proportion, and adds them into the mixing drum (11) from the feed pipe (23) and the water inlet pipe (24) respectively. When the monoammonium phosphate fixed powder enters the mixing drum (11) from the feed pipe (23), it is filtered for the first time through screening; S2: starting the stirring motor (22), the stirring motor (22) drives the stirring shaft (26) to rotate, thereby driving the stirring blade (27) to rotate, so that the monoammonium phosphate and water are fully mixed to form a monoammonium phosphate solution; S3: The purification pump (21) is started, and the monoammonium phosphate solution enters the filter cartridge (12) through the connecting pipe (14), and after further purification and filtration in the filter cartridge (12), enters the recovery cartridge (13) through the connecting pipe (15), thereby completing the purification process of the monoammonium phosphate.

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