Phosphoric acid tail gas treatment combined device

Abstract

The utility model discloses a phosphoric acid tail gas treatment combined device which comprises a first treatment box, the left side of the first treatment box is fixedly connected with a gas inlet pipe, and an adsorption mechanism is arranged in the first treatment box. According to the phosphoric acid tail gas treatment device, phosphoric acid tail gas enters the first treatment box through the gas inlet pipe, enters the second treatment box through the first connecting pipe after being subjected to primary adsorption treatment by activated carbon, enters the third treatment box through the second connecting pipe after being subjected to further reaction by a catalyst, and sprays liquid medicine to the third treatment box through the sprayer to react with the phosphoric acid tail gas; the tail gas enters a gas outlet pipe, is detected by a sensor, is directly discharged if the tail gas is qualified, and is disqualified if the tail gas is detected, gas circulation of the gas outlet pipe is closed through a first electromagnetic valve, and then a second electromagnetic valve is opened, so that the gas flows back to a second connecting pipe through a circulating pipe under the action of a gas pump, and then is treated by a spraying mechanism; and the tail gas is discharged through the gas outlet pipe until being qualified, so that the tail gas can be completely treated.

Description

TECHNICAL FIELD

[0001] The utility model relates to phosphoric acid tail gas treatment technical field especially a phosphoric acid tail gas treatment combination device. BACKGROUND

[0002] It is known that the method of phosphoric acid production mainly has two kinds of wet method and hot method. Among them, the phosphoric acid made by using sulfuric acid and other inorganic acid to treat phosphate rock is wet-process phosphoric acid, and the phosphoric acid obtained by burning and hydrating the elemental phosphorus produced by electric furnace or blast furnace is called hot-process phosphoric acid.

[0003] The phosphoric acid tail gas treatment device sprays alkaline substances into the phosphoric acid tail gas, so that the phosphoric acid tail gas is purified to reduce the pollution to the environment. When the high-temperature phosphoric acid tail gas passes through the alkaline substances, the harmful substances in the tail gas react under the action of the alkaline substances and are converted into non-toxic water or gas. The phosphoric acid tail gas treatment device of the prior art is prone to incomplete treatment, resulting in residual harmful gas in the treated tail gas. SUMMARY

[0004] In order to overcome the above-mentioned defects existing in the prior art, the utility model provides a phosphoric acid tail gas treatment combination device.

[0005] The utility model discloses a phosphoric acid tail gas treatment combination device, including the first processing box, the left side fixed connection air inlet pipe of first processing box, the inside of first processing box is provided with adsorption mechanism, the right side of first processing box is fixedly connected second processing box through first connecting pipe, the inside of second processing box is provided with catalytic treatment mechanism, the right side of second processing box is fixedly connected third processing box through second connecting pipe, the inside of third processing box is provided with spray mechanism, the right side fixed connection of third processing box is provided with circulating treatment mechanism.

[0006] Further, the adsorption mechanism includes a first sealing seat, the first sealing seat is provided with two groups, the first sealing seat can be detachably installed on the upper end of the first processing box, the first sealing seat is fixedly installed with a first mesh cylinder at the lower end, and the first mesh cylinder is filled with activated carbon.

[0007] Further, the first sealing seat is provided with a first blocking part, the first blocking part is in contact with the upper end surface of the first processing box, and the upper end of the first sealing seat is provided with a first pull ring.

[0008] Further, the catalytic treatment mechanism includes a second sealing seat, the second sealing seat is provided with two groups, the second sealing seat can be detachably installed on the upper end of the second processing box, the second sealing seat is fixedly installed with a second mesh cylinder at the lower end, and the second mesh cylinder is filled with a catalyst.

[0009] Further, the second sealing seat is provided with a second blocking part, which is in contact with the upper end surface of the second treatment box, and the upper end of the second sealing seat is provided with a second pull ring.

[0010] Further, the spraying mechanism comprises a liquid medicine pipe, which is arranged outside the upper end of the third treatment box, and the lower end of the liquid medicine pipe is connected with a plurality of groups of spray heads, which are located inside the third treatment box.

[0011] Further, the bottom of the third treatment box is provided with a slope part, and the lower end of the slope part is provided with a liquid outlet pipe, which is circumscribed with a waste liquid collecting device.

[0012] Further, the circulating treatment mechanism comprises a circulating pipe, the lower right end of which is connected with the gas outlet pipe in communication, the lower left end of the circulating pipe is connected with the second connecting pipe in communication, and the circulating pipe is provided with a gas pump, which is used for providing power for the gas flow.

[0013] Further, the inside of the gas outlet pipe is provided with a sensor, which is used for detecting the content of waste gas, and the gas outlet pipe is provided with a first electromagnetic valve, which is used for controlling the gas flow through the gas outlet pipe.

[0014] Further, the circulating pipe is provided with a second electromagnetic valve.

[0015] The beneficial effects of the utility model are as follows: the phosphoric acid tail gas enters the first treatment box through the gas inlet pipe, is preliminarily adsorbed by the activated carbon, enters the second treatment box through the first connecting pipe, is further reacted by the catalyst, enters the third treatment box through the second connecting pipe, the liquid medicine is sprayed to the third treatment box through the spray head to react with the phosphoric acid tail gas, then the tail gas enters the gas outlet pipe, is detected by the sensor, if qualified, is directly discharged, if unqualified, the first electromagnetic valve is closed to close the gas flow through the gas outlet pipe, then the second electromagnetic valve is opened, so that the gas is returned to the second connecting pipe through the circulating pipe under the action of the gas pump, then is treated by the spraying mechanism again until qualified and is discharged through the gas outlet pipe, so that the tail gas can be completely treated. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further explained in connection with the drawings and embodiments.

[0017] Figure 1 It is a front view of the utility model;

[0018] Figure 2 It is a sectional view of the spraying mechanism of the utility model.

[0019] In the diagram: 1. First processing box, 2. Second processing box, 3. Third processing box, 4. Inlet pipe, 5. First connecting pipe, 6. Second connecting pipe, 7. Outlet pipe, 8. First sealing seat, 9. First blocking part, 10. First pull ring, 11. First mesh cylinder, 12. Activated carbon, 13. Second sealing seat, 14. Second blocking part, 15. Second pull ring, 16. Second mesh cylinder, 17. Catalyst, 18. Liquid pipe, 19. Nozzle, 20. Angled part, 21. Liquid outlet pipe, 22. Sensor, 23. First solenoid valve, 24. Circulation pipe, 25. Second solenoid valve, 26. Air pump. Detailed Implementation

[0020] To more clearly illustrate the technical solution of this utility model, the following description is made in conjunction with the accompanying drawings. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings and embodiments without creative effort, and all of them fall within the protection scope of this utility model.

[0021] like Figure 1 As shown, this utility model includes a first processing box 1, with an air inlet pipe 4 fixedly connected to the left side of the first processing box 1. An adsorption mechanism is provided inside the first processing box 1, and the adsorption mechanism includes a first sealing seat 8. Two sets of the first sealing seats 8 are provided. The first sealing seats 8 are detachably installed on the upper end of the first processing box 1. A first mesh cylinder 11 is fixedly installed on the lower end of the first sealing seat 8. Activated carbon 12 is placed inside the first mesh cylinder 11. A first blocking part 9 is provided on the first sealing seat 8, and the first blocking part 9 is in contact with the upper end surface of the first processing box 1. A first pull ring 10 is provided on the upper end of the first sealing seat 8. By pulling the first pull ring 10, the first sealing seat 8 can be removed as a whole for easy replacement.

[0022] like Figure 1 As shown, the right side of the first processing box 1 is fixedly connected to the second processing box 2 via the first connecting pipe 5. The second processing box 2 is equipped with a catalytic treatment mechanism, which includes a second sealing seat 13. Two sets of the second sealing seats 13 are provided. The second sealing seats 13 are detachably installed on the upper end of the second processing box 2. A second mesh cylinder 16 is fixedly installed on the lower end of the second sealing seat 13. The second mesh cylinder 16 contains a catalyst 17. A second blocking part 14 is provided on the second sealing seat 13. The second blocking part 14 is in contact with the upper end surface of the second processing box 2. A second pull ring 15 is provided on the upper end of the second sealing seat 13.

[0023] like Figure 1 and Figure 2As shown, the right side of the second treatment tank 2 is fixedly connected to the third treatment tank 3 via the second connecting pipe 6. The third treatment tank 3 is equipped with a spraying mechanism, which includes a liquid pipe 18. The liquid pipe 18 is located on the upper outer side of the third treatment tank 3. The lower end of the liquid pipe 18 is connected to several sets of nozzles 19. The nozzles 19 are located inside the third treatment tank 3. The bottom of the third treatment tank 3 is provided with a sloping section 20. The lower end of the sloping section 20 is provided with a liquid outlet pipe 21. The liquid outlet pipe 21 is connected to a waste liquid collection device.

[0024] like Figure 1 and Figure 2 As shown, the right side of the third processing box 3 is fixedly connected to the exhaust pipe 7. The exhaust pipe 7 is equipped with a circulation processing mechanism, which includes a circulation pipe 24. The circulation pipe 24 is equipped with a second solenoid valve 25. The lower right end of the circulation pipe 24 is connected to the exhaust pipe 7, and the lower left end of the circulation pipe 24 is connected to the second connecting pipe 6. The circulation pipe 24 is equipped with an air pump 26, which is used to provide power for gas flow. The exhaust pipe 7 is equipped with a sensor 22, which is used to detect the exhaust gas content. The exhaust pipe 7 is equipped with a first solenoid valve 23, which is used to control the gas flow on the exhaust pipe 7.

[0025] In use, the phosphoric acid tail gas enters the first treatment tank 1 through the inlet pipe 4. After preliminary adsorption treatment by activated carbon 12, it enters the second treatment tank 2 through the first connecting pipe 5. After further reaction by catalyst 17, it enters the third treatment tank 3 through the second connecting pipe 6. The chemical solution is sprayed into the third treatment tank 3 through the nozzle 19 to react with the phosphoric acid tail gas. Then the tail gas enters the outlet pipe 7 and is detected by sensor 22. If it is qualified, it is discharged directly. If it is unqualified, the gas flow in the outlet pipe 7 is closed by the first solenoid valve 23. Then the second solenoid valve 25 is opened, so that the gas flows back to the second connecting pipe 6 through the circulation pipe 24 under the action of the air pump 26. Then it is treated by the spraying mechanism until it is qualified and then discharged through the outlet pipe 7, so that the tail gas can be completely treated.

[0026] The above embodiments are merely exemplary embodiments of the present utility model and are not intended to limit the present utility model. The scope of protection of the present utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present utility model.

Claims

1. A combined device for treating phosphoric acid tail gas, comprising a first treatment chamber (1), characterized in that: An air inlet pipe (4) is fixedly connected to the left side of the first treatment box (1). An adsorption mechanism is provided inside the first treatment box (1). A second treatment box (2) is fixedly connected to the right side of the first treatment box (1) through a first connecting pipe (5). A catalytic treatment mechanism is provided inside the second treatment box (2). A third treatment box (3) is fixedly connected to the right side of the second treatment box (2) through a second connecting pipe (6). A spraying mechanism is provided inside the third treatment box (3). An air outlet pipe (7) is fixedly connected to the right side of the third treatment box (3). A circulation treatment mechanism is provided on the air outlet pipe (7).

2. The combined device for treating phosphoric acid tail gas according to claim 1, characterized in that, The adsorption mechanism includes a first sealing seat (8), which is provided in two sets. The first sealing seat (8) is detachably installed on the upper end of the first processing box (1). The lower end of the first sealing seat (8) is fixedly installed with a first mesh cylinder (11), and activated carbon (12) is placed inside the first mesh cylinder (11).

3. The combined device for treating phosphoric acid tail gas according to claim 2, characterized in that, The first sealing seat (8) is provided with a first blocking part (9), which is in contact with the upper end surface of the first processing box (1). The upper end of the first sealing seat (8) is provided with a first pull ring (10).

4. The combined device for treating phosphoric acid tail gas according to claim 1, characterized in that, The catalytic treatment mechanism includes a second sealing seat (13), which is provided in two sets. The second sealing seat (13) is detachably installed on the upper end of the second treatment box (2). The lower end of the second sealing seat (13) is fixedly installed with a second mesh cylinder (16), and the second mesh cylinder (16) contains a catalyst (17).

5. The combined device for treating phosphoric acid tail gas according to claim 4, characterized in that, The second sealing seat (13) is provided with a second blocking part (14), which is in contact with the upper end surface of the second processing box (2). The upper end of the second sealing seat (13) is provided with a second pull ring (15).

6. The combined device for treating phosphoric acid tail gas according to claim 1, characterized in that, The spraying mechanism includes a liquid pipe (18), which is located on the upper outer side of the third treatment tank (3). The lower end of the liquid pipe (18) is connected to several sets of nozzles (19), which are located inside the third treatment tank (3).

7. The combined device for treating phosphoric acid tail gas according to claim 6, characterized in that, The bottom of the third processing box (3) is provided with a sloping part (20), and the lower end of the sloping part (20) is provided with a liquid outlet pipe (21), which is connected to a waste liquid collection device.

8. The combined device for treating phosphoric acid tail gas according to claim 7, characterized in that, The circulation processing mechanism includes a circulation pipe (24), the lower right end of the circulation pipe (24) is connected to the air outlet pipe (7), the lower left end of the circulation pipe (24) is connected to the second connecting pipe (6), and an air pump (26) is provided on the circulation pipe (24) to provide power for the gas flow.

9. A combined device for treating phosphoric acid tail gas according to claim 8, characterized in that, The outlet pipe (7) is equipped with a sensor (22) for detecting the content of exhaust gas. The outlet pipe (7) is equipped with a first solenoid valve (23) for controlling the gas flow on the outlet pipe (7).

10. A combined device for treating phosphoric acid tail gas according to claim 9, characterized in that, A second solenoid valve (25) is provided on the circulation pipe (24).

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