Device for purifying phosphoric acid by wet process

Abstract

The utility model belongs to the technical field of wet purification of phosphoric acid, and particularly relates to a device for wet purification of phosphoric acid, which comprises a purification treatment tank, a filter pressing assembly, a plurality of additive storage tanks, a driving assembly, a hollow rotating shaft, a feeding assembly, a quantitative feeding assembly, a deslagging assembly and a filter plate. The device is reasonable in design, can quantitatively fill different additives into the purification treatment tank according to actual requirements and stir the additives, so that the uniform mixing speed of an additive solution and wastewater can be improved, impurities generated by reaction can be conveniently discharged, the filter pressing of the wastewater can be synchronously realized, and the production efficiency is improved. Therefore, the pretreatment stage, the heavy metal removal stage, the biochemical treatment stage, the reverse osmosis closing stage and other stages of wet-process purification of the phosphoric acid wastewater can be integrated, the defect that the occupied equipment space required by wet-process purification of the phosphoric acid wastewater is large can be overcome, meanwhile, the efficiency of wet-process purification of the phosphoric acid wastewater can be improved, the treatment capacity is improved, and the treatment cost is reduced. The purpose of protecting the water environment is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wet-process phosphoric acid purification, in particular to a device for wet-process phosphoric acid purification. Background Art

[0002] Phosphoric acid is divided into thermal phosphoric acid and wet phosphoric acid according to the raw materials used in its manufacture. Because wet phosphoric acid has unique advantages over thermal phosphoric acid in terms of energy consumption, environmental protection, and resources, it is a general trend for wet phosphoric acid to replace thermal phosphoric acid. The wet phosphoric acid purification process is a common industrial wastewater treatment method that can effectively remove harmful substances such as phosphates. It generally includes a pretreatment stage (in a phosphate chemical plant, the raw material is mainly wastewater containing phosphates, and impurities such as metal ions such as iron, copper, and zinc, as well as some large molecular organic matter, need to be removed in the pretreatment. The pretreatment adopts a chemical coprecipitation method, adding FeC13 and Ca (OH)2 and other coagulants, and the coagulant PAC are added at the same time to gradually aggregate the suspended matter and form a precipitate. After pre-treatment, the COD concentration of the wastewater is reduced to 200~300mg / L, and the suspended solids content is reduced to 10~20mg / L, which effectively reduces the burden on subsequent purification equipment. ), heavy metal removal stage (after pre-treatment, there are still a large number of harmful substances such as phosphates and nitrides in the wastewater, which need further treatment. The first is heavy metal removal. The phosphate chemical plant mainly has heavy metal ions such as copper, nickel, zinc, and iron, and adopts a chemical carbon treatment method. The pH of the matrix is ​​adjusted, and then the agent EDTA (tetrasodium salt of ethylenediaminetetraacetic acid and activated carbon are added to form metal complexes and carbon adsorption to reduce the concentration of heavy metal ions to below 10ug / L, which meets the national emission standards)), biochemical treatment stage (after heavy metal removal, biochemical bacteria are added. Currently commonly used bacterial treatment methods are Aerobic, anaerobic, alternating aerobic and anaerobic, etc. The phosphate chemical plant "adopts the aerobic method, where water flows through the aeration tank, and microorganisms are added to metabolize and degrade pollutants through biochemical processes, further reducing COD concentrations and organic matter concentrations. Under normal circumstances, the COD concentration of the biochemical pool influent of the biochemical treatment wastewater of a certain phosphate chemical plant is about 600 mg / L, and the effluent concentration can reach below 50 mg / L, of which the phosphate concentration is as low as below 1 mg / L) and reverse osmosis closed stage (after biochemical treatment, the pretreatment stage of the wastewater removes unclean particles and biochemical pollution, and the mass is transferred to the membrane. Microfiltration or reverse osmosis compression is often used to filter or compress clean water. The phosphate chemical plant uses reverse osmosis membranes for treatment, with the aim of completely removing harmful substances such as phosphates in the water. The COD concentration before the membrane is about 200 mg / L, which is more than 1 mg / L after the membrane. The treated water volume of the entire purification process is about 100m3 / h).

[0003] However, when using phosphoric acid wet purification equipment to process the above-mentioned different stages, multiple devices are required to work together. The setting of multiple devices will cause the entire phosphoric acid wet purification equipment to occupy a large space. At the same time, the insufficient mixing efficiency between the additive solution added to the wastewater and the wastewater during the wet purification stage will affect the working time of the entire wet purification phosphoric acid treatment, thereby reducing the working efficiency. Therefore, the utility model proposes a device for wet purification of phosphoric acid to solve the above-mentioned problems.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model aims to provide a device for wet-process purification of phosphoric acid in order to solve the shortcomings mentioned in the above background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions: A device for wet purification of phosphoric acid, comprising a purification treatment tank, a filter press assembly, a plurality of additive storage tanks, a drive assembly, a hollow rotating shaft, a feed assembly, a quantitative feeding assembly, a slag discharge assembly and a filter plate;

[0007] The hollow rotating shaft is rotatably mounted on the purification treatment tank, and a plurality of through holes are provided on the hollow rotating shaft, the driving assembly and the feeding assembly are both arranged at the bottom of the purification treatment tank, the driving assembly is connected to the hollow rotating shaft, and the feeding assembly is connected to the hollow rotating shaft, a plurality of stirring blades are fixedly mounted on the hollow rotating shaft, a plurality of arc-shaped openings are provided on the purification treatment tank, and the filter press assembly is arranged on the outside of the purification treatment tank and in the plurality of arc-shaped openings, a plurality of additive storage tanks are fixedly mounted on the top of the purification treatment tank, the quantitative feeding assembly is arranged on the top of the hollow rotating shaft and on a plurality of additive storage tanks, the slag discharge assembly is arranged at an upper position on the outside of the purification treatment tank, a discharge pipe 1 and a discharge pipe 2 are fixedly mounted on the purification treatment tank, the filter plate is fixedly mounted on the inner wall of the purification treatment tank, and the discharge pipe 1 and the discharge pipe 2 are respectively located below and above the filter plate.

[0008] Preferably, the driving assembly includes a driving motor, an L-shaped plate, a driving gear and a driven gear. The L-shaped plate is fixedly installed on the bottom of the purification treatment tank, the driving motor is fixedly installed on the L-shaped plate, and the driving gear and the driven gear are fixedly sleeved on the output shaft of the driving motor and the hollow rotating shaft respectively, and the driving gear and the driven gear are meshed with each other.

[0009] Preferably, the quantitative feeding assembly includes multiple feed pipes, multiple quantitative control valves and vertical pipes. The top end of the hollow rotating shaft extends to the top of the purification treatment tank and the vertical pipe is sealed and rotatably installed. The top end of the vertical pipe is radially fixed with multiple feed pipes. The multiple feed pipes are respectively connected to the corresponding additive storage tanks, and the quantitative control valves are fixedly installed on the multiple feed pipes.

[0010] Preferably, the feed assembly includes a delivery pump, a delivery pipe and a one-way control valve. The delivery pump is fixedly installed on the bottom of the purification treatment tank, and the liquid inlet pipe and the delivery pipe are fixedly installed on the water inlet and the water outlet of the delivery pump respectively. The delivery pipe is U-shaped, and one end of the delivery pipe away from the delivery pump is sealed and rotatably installed on the bottom end of the hollow rotating shaft, and the one-way control valve is fixedly installed on the delivery pipe.

[0011] Preferably, the slag discharge assembly includes an annular pipe, a third discharge pipe and a plurality of connecting pipes, the plurality of connecting pipes are fixedly mounted on the purification treatment tank, the same annular pipe is fixedly mounted on the plurality of connecting pipes, and the third discharge pipe is fixedly mounted on the annular pipe.

[0012] Preferably, the filter press assembly includes an annular box body, four discharge pipes and multiple filter press plates, the filter press plates are fixedly installed in multiple arc-shaped openings, the annular box body is fixedly installed on the outer side of the purification treatment tank, the annular box body is connected to the purification treatment tank through the multiple arc-shaped openings, and the discharge pipe four is fixedly installed on the annular box body.

[0013] Preferably, a plurality of mesh scrapers and a plurality of strip scrapers are fixedly mounted on the hollow rotating shaft, the plurality of mesh scrapers and the plurality of connecting pipe inlet positions are located on the same horizontal plane, and the plurality of strip scrapers are in contact with the top side of the filter plate.

[0014] Preferably, a plurality of the auxiliary stirring rods are fixedly mounted on the inner side wall of the purification treatment tank, and the plurality of the auxiliary stirring rods and the plurality of the stirring blades are arranged in a staggered manner.

[0015] Preferably, the transparent tube is fixedly mounted on the purification tank, and the transparent tube is arranged in a U shape.

[0016] The beneficial effects of the utility model are as follows: the phosphoric acid wastewater that needs to be wet-purified is conveniently transported into the purification treatment tank through the cooperation of the provided feeding assembly, the hollow rotating shaft, the driving assembly, the stirring blades and the plurality of auxiliary stirring rods, and can be stirred at the same time; different additive solutions can be quantitatively added into the purification treatment tank according to actual needs through the provided quantitative feeding assembly in cooperation with the plurality of additive storage tanks and the plurality of through holes on the hollow rotating shaft; the slag discharge operation is conveniently performed through the cooperation of the provided slag discharge assembly, the mesh scraper, the strip scraper, the discharge pipe 2 and the filter plate; and the pressure filtration of the wastewater can be achieved by the pressure generated by the continuous feeding of the feeding assembly into the purification treatment tank through the filter press assembly, so that the pre-treatment stage, the heavy metal removal stage, the biochemical treatment stage and the reverse osmosis closure stage of the wet purification of phosphoric acid wastewater can be integrated, so that the large space occupation of the equipment required for the wet purification of phosphoric acid wastewater can be reduced, and at the same time, the efficiency of the wet purification of phosphoric acid wastewater can be improved, the treatment capacity can be improved, and the purpose of protecting the water environment is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a device for wet purification of phosphoric acid proposed by the utility model;

[0019] Figure 2 This is a schematic cross-sectional view of a device for wet purification of phosphoric acid proposed by the utility model;

[0020] Figure 3 This is a schematic diagram of the enlarged structure of part A in a device for wet purification of phosphoric acid proposed by the utility model.

[0021] In the figure: 1. purification treatment tank; 101. auxiliary stirring rod; 11. filter plate; 12. discharge pipe one; 13. strip scraper; 14. discharge pipe two; 2. hollow shaft; 201. drive motor; 202. driving gear; 203. driven gear; 21. mesh scraper; 211. annular pipe; 212. discharge pipe three; 22. stirring blade; 3. delivery pump; 31. delivery pipe; 32. one-way control valve; 4. additive storage tank; 41. feed pipe; 42. quantitative control valve; 5. annular box; 51. filter press plate; 52. discharge pipe four; 6. transparent tube. DETAILED DESCRIPTION

[0022] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Reference Figure 1-3A device for wet purification of phosphoric acid comprises a purification tank 1, a plurality of additive storage tanks 4, a hollow rotating shaft 2 and a filter plate 11, wherein the hollow rotating shaft 2 is rotatably mounted on the purification tank 1, and a plurality of through holes are provided on the hollow rotating shaft 2, an L-shaped plate is fixedly mounted on the bottom of the purification tank 1, and a driving motor 201 is fixedly mounted on the L-shaped plate, the installation of the driving motor 201 is facilitated by the arrangement of the L-shaped plate, and the stability of the support of the driving motor 201 can be ensured at the same time, so that the driving motor 201 can maintain stable operation, a driving gear 202 is fixedly sleeved on the output shaft of the driving motor 201, a driven gear 203 is fixedly sleeved on the hollow rotating shaft 2, the driving gear 202 and the driven gear 203 are meshed, and can be driven by the driving motor 201. When 201 is working, the driven gear 203 is driven to rotate by the driving gear 202, so as to drive the hollow shaft 2 to rotate. A delivery pump 3 is fixedly installed at the bottom of the purification tank 1, a liquid inlet pipe is fixedly installed at the water inlet of the delivery pump 3, and a delivery pipe 31 is fixedly installed at the water outlet of the delivery pump 3, and the delivery pipe 31 is arranged in a U shape, and one end of the delivery pipe 31 away from the delivery pump 3 is sealed and rotatably installed at the bottom of the hollow shaft 2, and a one-way control valve 32 is fixedly installed on the delivery pipe 31. Through the arrangement of the delivery pump 3, the liquid inlet pipe and the delivery pipe 31, phosphoric acid wastewater that needs to be wet-purified can be added to the purification tank 1, and at the same time, it can be ensured that the normal rotation of the hollow shaft 2 will not be affected, and the arrangement of the one-way control valve 32 can be used to control the phosphoric acid wastewater in the delivery pump 3. When not in operation, the wastewater in the purification tank 1 is prevented from flowing back toward the delivery pump 3 through the through hole on the hollow rotating shaft 2 and the delivery pipe 31. A plurality of stirring blades 22 are fixedly installed on the hollow rotating shaft 2. The plurality of stirring blades 22 are perpendicular to the hollow rotating shaft 2. When the hollow rotating shaft 3 rotates, the stirring blades 22 can be controlled to stir the solution in the purification tank 1, so that the additive solution can be quickly mixed with the phosphoric acid wastewater mixture that needs to be wet-purified injected into the purification tank 1 after being added into the purification tank 1, thereby increasing the mixing rate of the phosphoric acid wastewater that needs to be wet-purified and the additive solution. A plurality of arc-shaped openings are opened on the purification tank 1, and filter press plates 51 are fixedly installed in the plurality of arc-shaped openings. The purification tank 1 is fixedly installed with an annular box body 5 on the outside, and the annular box body 5 is connected with the purification tank 1 through a plurality of arc-shaped openings. A discharge pipe 4 52 is fixedly installed on the annular box body 5, and the pressure generated when the delivery pump 3 continuously delivers wastewater to the purification tank 1 through the delivery pipe 31 and the hollow shaft 2 and the through hole on the hollow shaft 2 can be matched with the filter press plate 51 to perform a filter press operation on the mixed liquid of phosphoric acid wastewater and additive solution that needs to be wet-purified in the purification tank 1. At the same time, the wastewater after filter press can be collected by the cooperation of the plurality of arc-shaped openings and the annular box body 5, and the water filtered out of the annular box body 5 can be discharged conveniently through the set drain pipe 4 52. The plurality of additive storage tanks 4 are fixedly installed on the top of the purification tank 1.Through the arrangement of multiple additive storage tanks 4, different types of required additive solutions can be stored simultaneously. The top of the hollow rotating shaft 2 extends to the top of the purification treatment tank 1 and is sealed and rotatably installed with a vertical pipe. A plurality of feed pipes 41 are fixedly installed on the top of the vertical pipe. The plurality of feed pipes 41 are radially arranged based on the vertical pipe as the center. The ends of the plurality of feed pipes 41 away from the vertical pipe are respectively connected to the corresponding additive storage tanks 4, and quantitative control valves 42 are fixedly installed on the plurality of feed pipes 41. The arrangement of the quantitative control valves 42 facilitates the addition of additives in different additive storage tanks 4 to the purification treatment tank 1 in a quantitative manner. The purification treatment tank 1 is fixedly installed with a plurality of feed pipes 41. Multiple connecting pipes, multiple connecting pipes are radially arranged based on the central axis of the purification tank 1, and the same annular pipe 211 is fixedly installed at one end of the multiple connecting pipes away from the purification tank 1, and the ends of the multiple connecting pipes away from the purification tank 1 are all arranged to be tilted downward, and a discharge pipe 3 212 is fixedly installed on the annular pipe 211, and the position of the annular pipe 212 close to the discharge pipe 3 212 is relatively low, and the position of the annular pipe 211 away from the discharge pipe 3 212 is arranged relatively high, so that the annular pipe 211 and the connecting pipe can be prevented from being blocked, and the suspension can be conveniently discharged through the arrangement and mutual cooperation of multiple connecting pipes, the annular pipe 211 and the discharge pipe 3 212. The debris on the wastewater surface is discharged from the purification tank 1, and the filter plate 11 is fixedly installed on the inner wall of the purification tank 1. The purification tank 1 is fixedly installed with a discharge pipe 12 and a discharge pipe 2 14, and the water inlet of the discharge pipe 12 and the water inlet of the discharge pipe 2 14 are respectively located below and above the filter plate 11. The solution below the filter plate 11 can be discharged from the purification tank 1 through the set discharge pipe 12, and the debris above the filter plate 11 intercepted by the filter plate 11 can be discharged through the set discharge pipe 2 14. A plurality of mesh scrapers 21 and a plurality of strip scrapers 13 are fixedly installed on the hollow shaft 2. The plurality of mesh scrapers 21 are connected to a plurality of The inlet of the through pipe is located on the same horizontal plane, and the multiple strip scrapers 13 are in contact with the top side of the filter plate 11. The angle between the multiple strip scrapers 13 and the horizontal plane is set at a 45-degree angle. The mesh scraper 21 can be set to move the suspended matter floating on the liquid surface in the early treatment stage and discharge it into the annular pipe 211 through the connecting pipe, and then discharge it through the discharge pipe 3 212. The strip scrapers 13 can prevent the generated sediment from affecting the normal filtering function of the filter plate 11, and at the same time facilitate the discharge pipe 2 14 to push the sediment intercepted by the filter plate 11 to the discharge pipe 2 14 and discharge it from the purification tank 1 through the discharge pipe 2 14.

[0024] In this embodiment, a plurality of auxiliary stirring rods 101 are fixedly installed on the inner wall of the purification treatment tank 1. The plurality of auxiliary stirring rods 101 and the plurality of stirring blades 22 are staggeredly arranged, and can cooperate with the stirring blades 22 to achieve auxiliary stirring of the solution in the purification treatment tank 1 as the stirring blades 22 move around the hollow rotating shaft 2 as the center.

[0025] In this embodiment, refer to Figure 1 A transparent tube 6 is fixedly installed on the purification tank 1. The transparent tube 6 is U-shaped. Both ends of the transparent tube 6 are connected to the purification tank 1, so that the staff can understand the liquid level in the purification tank 1 in real time.

[0026] In this embodiment, refer to Figure 2 The bottom inner wall of the purification tank 1 is inclined, and the low point of the bottom inner wall of the purification tank 1 is matched with the water inlet of the discharge pipe 12, which can guide the mixed solution in the purification tank 1 to avoid the situation where the accumulated liquid in the purification tank 1 cannot be completely discharged after use.

[0027] In this embodiment, in order to prevent the suspended debris generated during the wet phosphoric acid purification operation in the purification tank 1 from clogging the transparent tube 6, an interception mesh plate is provided at the upper inlet of the transparent tube 6 to prevent the suspended debris from entering the transparent tube 6 and causing blockage, resulting in a situation where the liquid level in the transparent tube 6 is different from the liquid level in the purification tank 1.

[0028] In this embodiment, an annular mounting seat is fixedly mounted on the top of the purification tank 1, and a plurality of additive storage tanks 4 are fixedly mounted on the annular mounting seat, which can provide stable support for the plurality of additive storage tanks 4 at the same time.

[0029] Working principle: When in use, first turn on the power supply, connect the liquid inlet pipe to the phosphoric acid wastewater that needs to be treated and needs to be wet-purified, and then use the delivery pump 3 to cooperate with the delivery pipe 31 to deliver the phosphoric acid wastewater that needs to be wet-purified to the purification tank 1 through the hollow shaft 2 and the multiple through holes opened on the hollow shaft 2, and then start the drive motor 201 and control the required additive solution in the additive storage tank 4 to be added to the purification tank 1 according to the required amount through the quantitative control valve 42. The driving motor 201 can drive the driving gear 202 to rotate, and the driving gear 202 rotates to control the driven gear 203 to rotate, and the driven gear 203 rotates to synchronously control the hollow shaft 201. The rotating shaft 2 rotates, and when the hollow rotating shaft 2 rotates, the multiple stirring blades 22 can be controlled to rotate based on the hollow rotating shaft 2 as the center. At the same time, with the cooperation of multiple auxiliary stirring rods 101, the mixed liquid of the phosphoric acid wastewater and the additive solution that need to be wet-purified in the purification tank 1 can be stirred, so that the additive can be mixed with the phosphoric acid wastewater that needs to be wet-purified better and faster, and then the phosphoric acid wastewater that needs to be wet-purified and the additive solution can be quickly mixed to a uniform state. After the additive solution is added to the phosphoric acid wastewater that needs to be wet-purified, the suspended matter and sediment precipitated will move closer to the position of the hollow rotating shaft 2, and the suspended matter will gradually float upward to the liquid surface, and the sediment will settle. The suspended solids will gather at the top side of the filter plate 11 near the hollow shaft 2. When the hollow shaft 2 rotates, the mesh scraper 21 and the strip scraper 13 can be controlled to scrape the floating suspended solids and the settled suspended solids respectively, so that the floating debris can enter the annular pipe 211 through the connecting pipe and be discharged through the discharge pipe 3 212. At the same time, the strip scraper 13 moves around the hollow shaft 2 to prevent the debris from affecting the normal filtration of the filter plate 11 and conveniently discharge it through the discharge pipe 2 14 to the purification tank 1. With the continuous feeding of the delivery pump 3, when the discharge pipe 1 12, the discharge pipe 2 14, the discharge pipe 3 212 and the discharge pipe 4 52 are in the closed state, the purification tank 1 can be The pressure rises, so that the mixed liquid of the phosphoric acid wastewater and the additive solution that need to be wet-purified in the purification tank 1 can be filtered under the action of the filter press plate 51, and discharged into the annular box 5, and then discharged from the annular box 5 with the cooperation of the discharge pipe 52, so that the pre-treatment stage, heavy metal removal stage, biochemical treatment stage and reverse osmosis closure stage of wet purification of phosphoric acid wastewater can be integrated into one, thereby reducing the shortage of large equipment space occupied by the coordinated use of multiple equipments required for wet purification of phosphoric acid wastewater, and at the same time, it can also improve the efficiency of wet purification of phosphoric acid wastewater, and can also effectively improve the ability of wet purification of phosphoric acid wastewater to treat, thereby achieving the purpose of protecting the water environment.

[0030] The above is a detailed introduction to a device for wet purification of phosphoric acid provided by the utility model. Specific embodiments are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A device for wet purification of phosphoric acid, characterized in that: It comprises a purification treatment tank (1), a filter press assembly, a plurality of additive storage tanks (4), a drive assembly, a hollow rotating shaft (2), a feed assembly, a quantitative feed assembly, a slag discharge assembly and a filter plate (11); The hollow rotating shaft (2) is rotatably mounted on the purification treatment tank (1), and a plurality of through holes are provided on the hollow rotating shaft (2). The driving assembly and the feeding assembly are both arranged at the bottom of the purification treatment tank (1), the driving assembly is connected to the hollow rotating shaft (2), and the feeding assembly is connected to the hollow rotating shaft (2). A plurality of stirring blades (22) are fixedly mounted on the hollow rotating shaft (2), a plurality of arc-shaped openings are provided on the purification treatment tank (1), and the filter press assembly is arranged outside the purification treatment tank (1) and inside the plurality of arc-shaped openings, and a plurality of the additive storage The tanks (4) are fixedly mounted on the top of the purification tank (1), the quantitative feeding assembly is arranged at the top of the hollow rotating shaft (2) and on the plurality of additive storage tanks (4), the slag discharge assembly is arranged at an upper position on the outer side of the purification tank (1), a discharge pipe 1 (12) and a discharge pipe 2 (14) are fixedly mounted on the purification tank (1), the filter plate (11) is fixedly mounted on the inner wall of the purification tank (1), and the discharge pipe 1 (12) and the discharge pipe 2 (14) are respectively located below and above the filter plate (11).

2. The device for wet purification of phosphoric acid according to claim 1, characterized in that: The driving assembly comprises a driving motor (201), an L-shaped plate, a driving gear (202) and a driven gear (203); the bottom of the purification tank (1) is fixedly mounted with the L-shaped plate, the driving motor (201) is fixedly mounted on the L-shaped plate, the driving gear (202) and the driven gear (203) are fixedly sleeved on the output shaft of the driving motor (201) and the hollow rotating shaft (2), respectively, and the driving gear (202) and the driven gear (203) are meshed with each other.

3. The device for wet purification of phosphoric acid according to claim 1, characterized in that: The quantitative feeding assembly comprises a plurality of feed pipes (41), a plurality of quantitative control valves (42) and a vertical pipe. The top end of the hollow rotating shaft (2) extends to the top of the purification treatment tank (1) and is sealed and rotatably mounted with the vertical pipe. The top end of the vertical pipe is radially and fixedly mounted with a plurality of feed pipes (41). The plurality of feed pipes (41) are respectively connected to corresponding additive storage tanks (4), and a quantitative control valve (42) is fixedly mounted on each of the plurality of feed pipes (41).

4. The device for wet purification of phosphoric acid according to claim 1, characterized in that: The feed assembly comprises a delivery pump (3), a delivery pipe (31) and a one-way control valve (32); the delivery pump (3) is fixedly mounted at the bottom of the purification treatment tank (1); a liquid inlet pipe and a delivery pipe (31) are fixedly mounted at the water inlet and the water outlet of the delivery pump (3), respectively; the delivery pipe (31) is arranged in a U shape; one end of the delivery pipe (31) away from the delivery pump (3) is sealed and rotatably mounted at the bottom end of the hollow rotating shaft (2); and a one-way control valve (32) is fixedly mounted on the delivery pipe (31).

5. The device for wet purification of phosphoric acid according to claim 1, characterized in that: The slag discharge assembly comprises an annular pipe (211), a discharge pipe three (212) and a plurality of connecting pipes; the plurality of connecting pipes are fixedly mounted on the purification treatment tank (1); the same annular pipe (211) is fixedly mounted on the plurality of connecting pipes; and the discharge pipe three (212) is fixedly mounted on the annular pipe (211).

6. The device for wet purification of phosphoric acid according to claim 1, characterized in that: The filter press assembly comprises an annular box body (5), a discharge pipe four (52) and a plurality of filter press plates (51), wherein the filter press plates (51) are fixedly installed in the plurality of arc-shaped openings, an annular box body (5) is fixedly installed on the outer side of the purification treatment tank (1), the annular box body (5) is connected to the purification treatment tank (1) through the plurality of arc-shaped openings, and a discharge pipe four (52) is fixedly installed on the annular box body (5).

7. The device for wet purification of phosphoric acid according to claim 5, characterized in that: A plurality of mesh scrapers (21) and a plurality of strip scrapers (13) are fixedly mounted on the hollow rotating shaft (2); the plurality of mesh scrapers (21) and the plurality of connecting pipe inlet positions are located on the same horizontal plane; and the plurality of strip scrapers (13) are in contact with the top side of the filter plate (11).

8. The device for wet purification of phosphoric acid according to claim 1, characterized in that: A plurality of auxiliary stirring rods (101) are fixedly mounted on the inner side wall of the purification tank (1), and the plurality of auxiliary stirring rods (101) and the plurality of stirring blades (22) are arranged in a staggered manner.

9. The device for wet purification of phosphoric acid according to claim 1, characterized in that: A transparent tube (6) is fixedly mounted on the purification tank (1), and the transparent tube (6) is arranged in a U shape.

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