Impurity removal device for sodium dihydrogen phosphate production

Abstract

The utility model discloses an impurity removal device for sodium dihydrogen phosphate production, which comprises a tank body, a filter mechanism is fixedly connected in the tank body, an input port is arranged on one side of the tank body and below the filter mechanism, an output port is arranged on the other side of the tank body and above the filter mechanism, first valves are arranged on the input port and the output port, and a second valve is arranged on the output port. According to the utility model, water flow for backflushing is input into the connecting pipe of the backflushing mechanism through the water pipe, and the water is conveyed into the spray pipe through the connecting pipe and is sprayed out from the nozzle to flush a filter screen of the filter mechanism, so that the filter screen of the filter mechanism is cleaned, and the backflushing efficiency is improved. Meanwhile, the rotating disc rotates the connecting pipe, the connecting pipe drives the spraying pipe to rotate, comprehensive back flushing of the filter screen is achieved, water obtained after flushing is discharged from the sewage draining exit in the bottom of the tank body, cleaning of the filter screen is achieved, impurities are prevented from being gathered on the filter screen, and reduction of the impurity removing efficiency is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sodium dihydrogen phosphate production, in particular to an impurity removal device used for sodium dihydrogen phosphate production. Background Art

[0002] At present, the production of sodium dihydrogen phosphate mainly adopts a wet-process phosphoric acid preparation method, which is to react wet-process phosphoric acid with ammonia water and then filter to obtain filter residue and filtrate, the filtrate is ammonium dihydrogen phosphate slurry, and then add sodium component to the ammonium dihydrogen phosphate slurry. After the feeding is completed, evaporation and crystallization are carried out. When a large number of crystals appear in the solution, evaporation is stopped, and the solution is cooled to room temperature, filtered to obtain filter cake and mother liquor, and the filter cake is washed and dried to obtain sodium dihydrogen phosphate.

[0003] In the prior art, when filtering is required after the reaction of wet-process phosphoric acid and ammonia water, the filtering is usually performed directly in a reactor provided with a filter plate. Since the solution after the reaction of wet-process phosphoric acid and ammonia water is mixed with solid matter, it is easy to cause the filter holes on the filter plate to be blocked, thereby affecting the impurity removal efficiency of the solution after the reaction of wet-process phosphoric acid and ammonia water, which is not conducive to the rapid production of sodium dihydrogen phosphate. In view of the above problems, an impurity removal device for the production of sodium dihydrogen phosphate is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide an impurity removal device for the production of sodium dihydrogen phosphate to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A de-impurity device for sodium dihydrogen phosphate production, comprising a tank body, a filtering mechanism fixedly connected to the tank body, an input port arranged below the filtering mechanism on one side of the tank body, an output port arranged above the filtering mechanism on the other side of the tank body, a first valve arranged on the input port and the output port, a sewage outlet arranged at the bottom of the tank body, a second valve arranged on the sewage outlet, a tank cover fixedly mounted on the top of the tank body by bolts, a recoil mechanism rotatably connected to the tank cover, a water pipe inserted on the top of the recoil mechanism, and a plurality of legs fixedly connected to the bottom of the tank body in a circumferential manner;

[0007] The recoil mechanism includes a connecting pipe, which passes through the tank cover and is rotatably connected to the tank cover. A quick-connect plug is fixedly connected to the top of the connecting pipe, a third valve is arranged on the connecting pipe, a water pipe is plugged into the quick-connect plug, and a plurality of nozzles are fixedly connected to the bottom of the connecting pipe in a circle inside the tank body, and nozzles are evenly arranged at the bottom of the nozzles.

[0008] As a further solution of the utility model: a turntable is fixedly connected to the connecting pipe.

[0009] As a further solution of the utility model: a lifting ring is symmetrically fixedly installed on the top of the tank cover.

[0010] As a further solution of the utility model: the top of the filter mechanism is flush with the bottom of the inner wall of the output port.

[0011] As a further solution of the utility model: the filtering mechanism includes a support ring and a filter screen, the support ring is built into the tank body, and the support ring is fixedly connected to the inner wall of the tank body, the filter screen is embedded in the support ring, and the support ring is fixedly connected to the filter screen by bolts.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model inputs the water flow for recoil into the connecting pipe of the recoil mechanism through the water pipe, the water is transported to the spray pipe through the connecting pipe, and sprayed out from the nozzle to wash the filter screen of the filter mechanism, and at the same time, the turntable rotates the connecting pipe, and the connecting pipe rotates with the spray pipe to realize the comprehensive recoil of the filter screen, and the flushed water is discharged from the sewage outlet at the bottom of the tank body to realize the cleaning of the filter screen, avoid the accumulation of impurities on the filter screen, and avoid the reduction of impurity removal efficiency.

[0014] 2. The sodium dihydrogen phosphate solution used for impurity removal in the utility model is input into the tank body from the input port, filtered by the filter screen in the filter mechanism in the tank body, and the filtered solution is discharged from the output port. The stains produced by the filtration are gathered at the bottom of the tank body. By opening the second valve, the gathered impurities are discharged from the sewage outlet. The impurity removal method is efficient and the impurity removal device has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic diagram of the structure of an impurity removal device used in the production of sodium dihydrogen phosphate.

[0016] Figure 2 The present invention is a cross-sectional view of an impurity removal device used in the production of sodium dihydrogen phosphate.

[0017] Figure 3 for Figure 1 A partial enlarged view of point A in the middle.

[0018] In the figure: 1. tank body; 2. support legs; 3. inlet; 4. outlet; 5. first valve; 6. drain outlet; 7. second valve; 8. tank cover; 9. lifting ring; 10. connecting pipe; 11. third valve; 12. turntable; 13. quick-connect plug; 14. water pipe; 15. support ring; 16. filter screen; 17. spray pipe; 18. nozzle. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figures 1 to 3 In an embodiment of the utility model, a de-impurity device for sodium dihydrogen phosphate production comprises a tank body 1, a filtering mechanism is fixedly connected inside the tank body 1, an input port 3 is arranged below the filtering mechanism on one side of the tank body 1, an output port 4 is arranged above the filtering mechanism on the other side of the tank body 1, a first valve 5 is arranged on both the input port 3 and the output port 4, a sewage outlet 6 is arranged at the bottom of the tank body 1, a second valve 7 is arranged on the sewage outlet 6, a tank cover 8 is fixedly installed on the top of the tank body 1 by bolts, a recoil mechanism is rotatably connected to the tank cover 8, a water pipe 14 is plugged on the top of the recoil mechanism, and a plurality of legs 2 are fixedly connected to the bottom of the tank body 1 in a circumferential manner;

[0021] The recoil mechanism includes a connecting pipe 10, which passes through the tank cover 8 and is rotatably connected to the tank cover 8. A quick-connect plug 13 is fixedly connected to the top of the connecting pipe 10, a third valve 11 is provided on the connecting pipe 10, a water pipe 14 is plugged into the quick-connect plug 13, and a plurality of nozzles 17 are fixedly connected to the bottom of the connecting pipe 10 in a circle inside the tank body 1, and nozzles 18 are evenly arranged at the bottom of the nozzles 17.

[0022] When in use, close the second valve 7 and the third valve 11, and open the first valve 5 at the same time, the sodium dihydrogen phosphate solution for impurity removal is input into the tank body 1 from the input port 3, filtered by the filtering mechanism in the tank body 1, and the filtered solution is discharged from the output port 4. The stains generated by the filtration are gathered at the bottom of the tank body 1. After the working moving time, close the first valve 5, open the second valve 7 and the third valve 11, and the impurities gathered at the bottom of the tank body 1 are discharged from the sewage outlet 6. The water for backwashing is transported to the connecting pipe 10 through the water pipe 14, and the water is transported to the spray pipe 17 through the connecting pipe 10 and sprayed from the nozzle 18 to rinse the filtering mechanism. The flushed water is discharged from the sewage outlet 6 at the bottom of the tank body 1.

[0023] The connecting pipe 10 is fixedly connected with a rotating disk 12. When the backflushing mechanism is in use, the connecting pipe 10 is rotated by the rotating disk 12, and the connecting pipe 10 rotates with the nozzle 17 to realize backflushing of the filtering mechanism.

[0024] A lifting ring 9 is symmetrically fixedly installed on the top of the tank cover 8, and the lifting ring 9 is provided to facilitate the lifting of the tank cover 8 for disassembly.

[0025] The top of the filter mechanism is flush with the bottom of the inner wall of the output port 4. Since the top of the filter mechanism is flush with the bottom of the inner wall of the output port 4, it is beneficial to discharge the sodium dihydrogen phosphate after filtering and impurity removal.

[0026] The filtering mechanism includes a support ring 15 and a filter screen 16. The support ring 15 is built into the tank body 1 and fixedly connected to the inner wall of the tank body 1. The filter screen 16 is embedded in the support ring 15 and fixedly connected to the filter screen 16 by bolts. The support ring 15 and the filter screen 16 in the supporting mechanism are fixedly connected by bolts. By removing the bolts, the support ring 15 and the filter screen 16 can be separated, which facilitates the disassembly of the filter screen 16.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An impurity removal device for sodium dihydrogen phosphate production, comprising a tank body (1), characterized in that: A filter mechanism is fixedly connected inside the tank body (1); an input port (3) is provided below the filter mechanism on one side of the tank body (1); an output port (4) is provided above the filter mechanism on the other side of the tank body (1); a first valve (5) is provided on both the input port (3) and the output port (4); a sewage outlet (6) is provided at the bottom of the tank body (1); a second valve (7) is provided on the sewage outlet (6); a tank cover (8) is fixedly mounted on the top of the tank body (1) by bolts; a recoil mechanism is rotatably connected to the tank cover (8); a water pipe (14) is plugged into the top of the recoil mechanism; and a plurality of legs (2) are fixedly connected to the bottom of the tank body (1) in a circular manner; The recoil mechanism comprises a connecting pipe (10), the connecting pipe (10) passes through the tank cover (8), and the connecting pipe (10) is rotatably connected to the tank cover (8), a quick-connect plug (13) is fixedly connected to the top of the connecting pipe (10), a third valve (11) is arranged on the connecting pipe (10), a water pipe (14) is plugged into the quick-connect plug (13), and a plurality of nozzles (17) are fixedly connected to the bottom of the connecting pipe (10) in a circle inside the tank body (1), and nozzles (18) are evenly arranged at the bottom of the nozzles (17).

2. The impurity removal device for sodium dihydrogen phosphate production according to claim 1, characterized in that: A rotating disk (12) is fixedly connected to the connecting pipe (10).

3. The impurity removal device for sodium dihydrogen phosphate production according to claim 1, characterized in that: A lifting ring (9) is symmetrically fixedly mounted on the top of the tank cover (8).

4. The impurity removal device for sodium dihydrogen phosphate production according to claim 1, characterized in that: The top of the filtering mechanism is flush with the bottom of the inner wall of the output port (4).

5. The impurity removal device for sodium dihydrogen phosphate production according to claim 1, characterized in that: The filtering mechanism comprises a support ring (15) and a filter screen (16); the support ring (15) is built into the tank body (1), and the support ring (15) is fixedly connected to the inner wall of the tank body (1); the filter screen (16) is embedded in the support ring (15), and the support ring (15) is fixedly connected to the filter screen (16) by bolts.

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