A wet scrubbing system for monoammonium phosphate production

Abstract

The utility model discloses a wet scrubbing system for monoammonium phosphate production, relates to the technical field of phosphate fertilizer production, comprises a pipe washer, a multi-stage washing box, a defoaming box and an exhaust pipe which are connected in sequence, the bottom liquid outlets of the pipe washer and the multi-stage washing box are respectively connected with a pipe washing liquid sealing groove and a box washing liquid sealing groove through pipelines, the pipe washing liquid sealing groove is connected with a plurality of first nozzles through pipelines, the plurality of first nozzles are all installed on the inner side of the pipe washer, the box washing liquid sealing groove is connected with a plurality of second nozzles through pipelines, the plurality of second nozzles are all installed on the inner side of the multi-stage washing box; the pipe washer, the multi-stage washing box and the defoaming box are connected by a guide pipe, thereby reducing the floor space of the overall device, and achieving a full washing effect through three sprayings, the multi-stage washing box is provided with a plurality of boxes, and the ventilation holes between the boxes are staggered, thereby extending the number of times that the liquid-containing gas is directly defoamed in the multi-stage washing box, thereby achieving a better defoaming effect.

Description

Technical Field

[0001] The utility model relates to the technical field of phosphate compound fertilizer production, and more specifically to a wet washing system for monoammonium phosphate production. Background Art

[0002] At present, a lot of dusty gas is generated in the production process of compound fertilizers. There are two common ways to deal with dusty gas. One is a first-stage dry sedimentation plus a first-stage wet washing and defoaming exhaust tower; the other is a two-stage tube washing plus a washing tower plus a defoaming exhaust tower. The former has a long process and high wind resistance; the latter uses tube washing and washing towers directly in series, and the tube washing liquid is mixed with the washing tower washing liquid, which has low washing efficiency, and the defoaming tower mostly uses defoaming nets or other fillers, which have high wind resistance and occupy a large area. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned technical problems and provide a wet washing system for monoammonium phosphate production, which has the characteristics of compact structure, relatively independent structure of pipe washing and washing box, and can achieve the effects of small footprint, positive collision defoaming and high washing efficiency.

[0004] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical scheme: a wet washing system for monoammonium phosphate production, the washing system comprising a pipe washer, a multi-stage washing box, a defoamer box, and an exhaust pipe which are connected in sequence, the bottom liquid outlets of the pipe washer and the multi-stage washing box are respectively connected to a pipe washing liquid sealing groove and a box washing liquid sealing groove through pipelines, the liquid outlet of the pipe washing liquid sealing groove is connected to a plurality of first nozzles through pipelines, and the plurality of first nozzles are all installed on the inner side of the pipe washer, and the liquid outlet of the box washing liquid sealing groove is connected to a plurality of second nozzles through pipelines, and the plurality of second nozzles are all installed on the inner side of the multi-stage washing box.

[0005] In order to make the pipe washer, the multi-stage washing box and the defoaming box interconnected, as a preferred wet washing system for monoammonium phosphate production of the utility model, the multi-stage washing box includes a primary box body, a secondary box body and a tertiary box body which are fixedly connected in sequence, and ventilation holes are provided on the two connecting walls between the primary box body, the secondary box body and the tertiary box body. A pipe washing guide pipe is connected between the upper part of the outer side of the primary box body and the pipe washer, and a box washing guide pipe is connected between the lower part of the outer side of the tertiary box body and the defoaming box.

[0006] In order to increase the number of ventilation holes to improve the effect of direct collision defoaming, as a preferred wet washing system for monoammonium phosphate production of the utility model, the ventilation holes include a first ventilation hole, a second ventilation hole and three third ventilation holes, the first ventilation hole is located at the lower part of the connecting wall between the first-level box and the second-level box, the second ventilation hole is located at the upper part of the connecting wall between the second-level box and the tertiary box, the middle part of the inner side of the first-level box, the second-level box and the tertiary box are fixedly connected with partitions, and the three third ventilation holes are respectively located on the three partitions.

[0007] In order to prolong the gas washing process in the multi-stage washing box, as a preferred wet washing system for monoammonium phosphate production of the utility model, the first ventilation hole is located below the partition and the second ventilation hole is located above the partition.

[0008] In order to further improve the effect of the positive impact defoaming of the multi-stage washing box, as a preferred embodiment of the wet washing system for monoammonium phosphate production of the utility model, the area of ​​the third ventilation hole is less than half of the area of ​​the partition.

[0009] In order to facilitate the delivery of spray liquid to the nozzles, as a preferred wet washing system for monoammonium phosphate production of the utility model, a first pump body is installed in the middle of the pipeline between a plurality of first nozzles and the pipe washing liquid sealing groove, and a second pump body is installed in the middle of the pipeline between a plurality of second nozzles and the box washing liquid sealing groove.

[0010] In order to adjust the amount of spraying liquid according to the concentration of dust-containing gas, as a preferred wet washing system for monoammonium phosphate production of the utility model, multiple second nozzles are respectively located on the top of the inner walls of the first-stage box, the second-stage box, and the third-stage box, and the number of second nozzles installed inside the first-stage box, the second-stage box, and the third-stage box decreases successively.

[0011] In order to facilitate the reuse of the treated liquid in the final defoamer tank, as a preferred wet washing system for monoammonium phosphate production of the utility model, the bottom liquid outlet of the defoamer tank is connected to the liquid inlet of the tank washing liquid sealing tank through a pipeline.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. The dust-containing gas enters the pipe washer for atomization spraying, and the liquid-containing gas mixes with the liquid and goes down the pipe washer, and after positive collision and defoaming, it rises in the opposite direction, and then enters the multi-stage washing box through the pipe washing guide pipe. The liquid-containing gas collides and defoams in the multi-stage washing box, and then enters the defoaming box through the box washing guide pipe. By setting the pipe washer, multi-stage washing box, and defoaming box connected by a guide pipe, the floor space of the overall device is reduced, and the washing efficiency is also improved;

[0014] 2. The multi-stage washing box is equipped with multiple boxes and the ventilation holes between the boxes are staggered, thereby extending the number of times the liquid-containing gas is directly defoamed in the multi-stage washing box, thereby achieving a better defoaming effect;

[0015] 3. By setting up a pipe washer and a defoamer box at the head and tail of the overall washing device, and using spraying and direct collision defoaming methods, the dust-containing gas enters the pipe washer, and the dust-containing gas is subjected to the first atomization spray washing through the first nozzle, and then enters the multi-stage washing box for the second spray washing, and finally the liquid-containing gas enters the defoamer box for the third washing, so that the full washing effect is achieved through three spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of a multi-stage washing box of the utility model.

[0018] Figure numerals: 1. pipe washer; 2. pipe washing guide pipe; 3. pipe washing liquid sealing groove; 301. first pump body; 302. first nozzle; 4. box washing liquid sealing groove; 401. second pump body; 402. second nozzle; 5. multi-stage washing box; 501. first box body; 5011. first ventilation hole; 502. second box body; 5021. second ventilation hole; 503. third box body; 504. partition; 5041. third ventilation hole; 6. box washing guide pipe; 7. defoaming box; 8. exhaust pipe. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0021] See also Figure 1-2 The utility model provides the following technical solutions: a wet washing system for monoammonium phosphate production, the washing system comprising a pipe washer 1, a multi-stage washing box 5, a defoamer box 7, and an exhaust pipe 8 which are connected in sequence, the bottom liquid outlets of the pipe washer 1 and the multi-stage washing box 5 are respectively connected to a pipe washing liquid sealing groove 3 and a box washing liquid sealing groove 4 through pipelines, the liquid outlet of the pipe washing liquid sealing groove 3 is connected to a plurality of first nozzles 302 through a pipeline, and the plurality of first nozzles 302 are all installed on the inner side of the pipe washer 1, and the liquid outlet of the box washing liquid sealing groove 4 is connected to a plurality of second nozzles 402 through a pipeline, and the plurality of second nozzles 402 are all installed on the inner side of the multi-stage washing box 5.

[0022] In this embodiment: (the pipe washer adopts a pipe body deammoniation washer with a size of ф1800X10500, and the defoamer box adopts a square cavity deammoniation defoamer with a size of 7900X3000X7100) the dust-containing gas enters through the inlet of the pipe washer 1, and the dust-containing gas is atomized and sprayed for washing by the first nozzle 302, the liquid-containing gas is mixed with the liquid and moves downward along the pipe washer 1, and the liquid-containing gas collides with the bottom of the pipe washer 1 for defoaming and then rises in the reverse direction, and then enters the multi-stage washing box 5 through the pipe washing guide pipe 2, and the second nozzle 402 sprays and washes the liquid-containing gas, and the liquid-containing gas collides and defoams in the multi-stage washing box 5, and then enters the defoamer box 7 through the box washing guide pipe 6, and collides with the bottom of the defoamer box 7 for defoaming and then rises in the reverse direction, and is finally discharged through the exhaust pipe 8.

[0023] As a technical optimization solution of the utility model, the multi-stage washing box 5 includes a first-stage box body 501, a second-stage box body 502, and a third-stage box body 503 that are fixedly connected in sequence. A first ventilation hole 5011 is opened at the lower part of the connecting wall between the first-stage box body 501 and the second-stage box body 502, and a second ventilation hole 5021 is opened at the upper part of the connecting wall between the second-stage box body 502 and the third-stage box body 503. The first ventilation hole 5011 is located below the partition 504, and the second ventilation hole 5021 is located below the partition 504. Above the partition 504, the middle part of the inner side of the first-stage box 501, the second-stage box 502 and the third-stage box 503 are all fixedly connected with the partition 504, and the three partitions 504 are each provided with a third ventilation hole 5041, and the area of ​​the third ventilation hole 5041 is smaller than one half of the area of ​​the partition 504. The upper part of the outer side of the first-stage box 501 is connected to the tube washer 1 through a tube washing guide pipe 2, and the lower part of the outer side of the third-stage box 503 is connected to the defoaming box 7 through a box washing guide pipe 6.

[0024] In the present embodiment: the liquid-containing gas enters the top of the primary box 501 through the pipe washing guide pipe 2, collides with its internal partition 504 and enters the bottom of the primary box 501 through the third ventilation hole 5041, then enters the secondary box 502 through the first ventilation hole 5011, collides with its internal partition 504 and rises to the top of the secondary box 502 through the third ventilation hole 5041, then enters the tertiary box 503 through the second ventilation hole 5021, collides with its internal partition 504 and enters the bottom of the tertiary box 503 through the third ventilation hole 5041, and finally enters the defoaming box 7 through the box washing guide pipe 6.

[0025] As a technical optimization solution of the utility model, a first pump body 301 is installed in the middle of the pipeline between several first nozzles 302 and the pipe washing liquid sealing groove 3, and a second pump body 401 is installed in the middle of the pipeline between multiple second nozzles 402 and the box washing liquid sealing groove 4.

[0026] In this embodiment: by setting up the first pump body 301, the pipeline can conveniently transport the treated liquid in the pipe washing liquid sealing groove 3 to the first nozzle 302 for repeated spraying and use; by setting up the second pump body 401, the pipeline can conveniently transport the treated liquid in the box washing liquid sealing groove 4 to the second nozzle 402 for repeated spraying and use.

[0027] As a technical optimization solution of the utility model, multiple second nozzles 402 are respectively located at the top of the inner walls of the first-level box 501, the second-level box 502, and the third-level box 503, and the number of second nozzles 402 installed inside the first-level box 501, the second-level box 502, and the third-level box 503 decreases successively.

[0028] In this embodiment: Figure 2 Since the liquid-containing gas enters the first-stage box 501 through the pipe washing guide pipe 2, passes through the second-stage box 502 and the third-stage box 503 for positive collision removal of foam, and is finally discharged through the box washing guide pipe 6, the number of nozzles in each box is proportional to the dust-containing gas concentration, thereby improving the efficiency of spraying for desulfurization, deammonia and dust removal.

[0029] As a technical optimization scheme of the utility model, the bottom liquid outlets of the tube washer 1 and the multi-stage washing box 5 are respectively connected to the tube washing liquid sealing groove 3 and the box washing liquid sealing groove 4 through pipelines, and the bottom liquid outlet of the defoaming box 7 is connected to the liquid inlet of the box washing liquid sealing groove 4 through a pipeline.

[0030] In this embodiment: the pipe washing liquid sealing tank 3 and the box washing liquid sealing tank 4 are provided to collect the liquid in the washing process of the entire washing device, and then the liquid is recovered and transported to the washing device through two pipelines for repeated use.

[0031] The working principle and use process of this utility model:

[0032] 1. The dust-containing gas enters through the inlet of the pipe washer 1, and is atomized and sprayed for washing by the first nozzle 302. The liquid-containing gas is mixed with the liquid and moves downward along the pipe washer 1. The liquid-containing gas collides with the bottom of the pipe washer 1 to remove foam and then rises in the opposite direction. Then, it passes through the pipe washing guide pipe 2 and enters the multi-stage washing box 5. The spray washing liquid enters the pipe washing liquid sealing tank 3 through the pipeline, and the washing liquid is continuously transported by the first pump body 301 to the first nozzle 302 for recycling.

[0033] 2. The liquid-containing gas enters the top of the primary box 501 through the pipe washing guide pipe 2, collides with its internal partition 504 and enters the bottom of the primary box 501 through the third ventilation hole 5041, then enters the secondary box 502 through the first ventilation hole 5011, collides with its internal partition 504 and rises to the top of the secondary box 502 through the third ventilation hole 5041, then enters the tertiary box 503 through the second ventilation hole 5021, collides with its internal partition 504 and enters the bottom of the tertiary box 503 through the third ventilation hole 5041, and finally enters the defoaming box 7 through the box washing guide pipe 6, and the spray washing liquid enters the box washing liquid sealing groove 4 through the pipeline, and the washing liquid continues to be transported by the second pump body 401 to the second nozzle 402 for recycling.

[0034] 3. The liquid-containing gas rises in the reverse direction after being directly defoamed at the bottom of the defoaming box 7, and is finally discharged through the exhaust pipe 8. The washing liquid enters the washing liquid sealing tank 4 through the pipeline.

[0035] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A wet scrubbing system for monoammonium phosphate production, characterized in that: The washing system comprises a pipe washer (1), a multi-stage washing box (5), a defoaming box (7), and an exhaust pipe (8) which are connected in sequence. The bottom liquid outlets of the pipe washer (1) and the multi-stage washing box (5) are respectively connected to a pipe washing liquid sealing groove (3) and a box washing liquid sealing groove (4) through pipelines. The liquid outlet of the pipe washing liquid sealing groove (3) is connected to a plurality of first nozzles (302) through a pipeline. The plurality of first nozzles (302) are all installed on the inner side of the pipe washer (1). The liquid outlet of the box washing liquid sealing groove (4) is connected to a plurality of second nozzles (402) through a pipeline. The plurality of second nozzles (402) are all installed on the inner side of the multi-stage washing box (5).

2. A wet scrubbing system for monoammonium phosphate production according to claim 1, characterized in that: The multi-stage washing box (5) comprises a primary box body (501), a secondary box body (502), and a tertiary box body (503) which are fixedly connected in sequence; two connecting walls between the primary box body (501), the secondary box body (502), and the tertiary box body (503) are provided with ventilation holes; an upper portion of the outer side of the primary box body (501) is connected to the tube washer (1) via a tube washing guide pipe (2); and a lower portion of the outer side of the tertiary box body (503) is connected to the defoaming box (7) via a box washing guide pipe (6).

3. A wet scrubbing system for monoammonium phosphate production according to claim 2, characterized in that: The ventilation holes include a first ventilation hole (5011), a second ventilation hole (5021) and three third ventilation holes (5041); the first ventilation hole (5011) is located at the lower part of the connecting wall between the first-stage box (501) and the second-stage box (502); the second ventilation hole (5021) is located at the upper part of the connecting wall between the second-stage box (502) and the third-stage box (503); the middle parts of the inner sides of the first-stage box (501), the second-stage box (502) and the third-stage box (503) are fixedly connected with a partition plate (504); and the three third ventilation holes (5041) are respectively located on the three partition plates (504).

4. A wet scrubbing system for monoammonium phosphate production according to claim 3, characterized in that: The first ventilation hole (5011) is located below the partition (504), and the second ventilation hole (5021) is located above the partition (504).

5. A wet scrubbing system for monoammonium phosphate production according to claim 3, characterized in that: The area of ​​the third ventilation hole (5041) is less than half the area of ​​the partition (504).

6. A wet scrubbing system for monoammonium phosphate production according to claim 1, characterized in that: A first pump body (301) is installed in the middle of the pipeline between the plurality of first nozzles (302) and the pipe washing liquid sealing groove (3), and a second pump body (401) is installed in the middle of the pipeline between the plurality of second nozzles (402) and the tank washing liquid sealing groove (4).

7. A wet scrubbing system for monoammonium phosphate production according to claim 1, characterized in that: The plurality of second nozzles (402) are respectively located at the top of the inner walls of the primary box (501), the secondary box (502), and the tertiary box (503), and the number of second nozzles (402) installed inside the primary box (501), the secondary box (502), and the tertiary box (503) decreases successively.

8. A wet scrubbing system for monoammonium phosphate production according to claim 1, characterized in that: The bottom liquid outlet of the defoaming box (7) is connected to the liquid inlet of the box washing liquid sealing tank (4) through a pipeline.

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