Novel solvent storage tank tail gas treatment device

Abstract

The utility model discloses a novel solvent storage tank tail gas treatment device which comprises a support, a water washing tower and a water pump are fixedly installed on the support, a water inlet pipe and a bent pipe are fixedly installed on the water pump, and the water inlet pipe is fixedly communicated with the bottom of the water washing tower. By arranging the water pump, the water inlet pipe, the bent pipe, the water receiving plate and the second drainage pipe, a water source at the bottom of the inner cavity of the water scrubber can be pumped by the water inlet pipe by starting the water pump, and the water source is conveyed to the spray head through the bent pipe to be sprayed out to perform primary circulating spraying on tail gas; the water source is introduced into the water washing tower from the transverse pipe, so that the water source can be in contact with the rising tail gas to realize secondary spraying, and finally, the water source flows into the water receiving plate and can be discharged from the second water discharging pipe, so that two-stage spraying is realized, and organic matters in the waste gas can be recycled; therefore, the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of tail gas treatment, and particularly relates to a novel tail gas treatment device for a solvent storage tank. Background Technique

[0002] In the process of chemical production, raw material storage tanks and solvent storage tanks are widely used. Due to reasons such as temperature changes or feeding into the tank, the vent pipeline or breather valve in the tank will discharge waste gas containing organic solvents. According to environmental protection requirements, tail gas containing toxic and harmful components must be treated by corresponding treatment equipment until it meets the standards before being discharged. Commonly used treatment methods include water spray. For example, the patent with the publication number CN209809918 discloses a raw material storage tank tail gas treatment device and a tail gas treatment system, including a tail gas collection hood, a fan, a water washing packing tower, and at least one raw material storage tank; the tail gas outlet of at least one raw material storage tank is connected to the tail gas collection hood through a first pipeline, the tail gas collection hood is connected to the fan through a second pipeline, and the fan is connected to the tail gas inlet of the water washing packing tower through a third pipeline; the water washing packing tower is provided with an absorbent inlet, and the absorbent inlet is connected to a water supply unit through a water washing pipeline. This utility model can enable the storage tank tail gas in the raw material tank area to be discharged up to standard in an organized manner, centrally treat the organic matter in the tail gas, the treatment method is simple and effective, the cost is low, the environmental protection effect is good, and it effectively alleviates the environmental pollution problem caused by directly discharging the tail gas into the atmosphere.

[0003] However, there are some problems in this existing technology: The water washing tower directly sprays water on the waste gas to absorb the organic matter in the waste gas to achieve the purpose of reducing the content of organic matter in the waste gas. Although this method can achieve the purpose of reducing the content of organic matter in the waste gas, it does not recover the organic matter in the waste gas, resulting in a certain waste and increasing the production cost. Therefore, we propose a novel tail gas treatment device for a solvent storage tank. Summary of the Utility Model

[0004] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a novel tail gas treatment device for a solvent storage tank. By adopting a two-stage spraying method, the organic matter in the waste gas can be recovered, thereby reducing the production cost.

[0005] The present utility model is realized as follows. A novel solvent storage tank tail gas treatment device includes a bracket, on which a water washing tower and a water pump are fixedly installed. An inlet pipe and a bent pipe are fixedly installed on the water pump. The inlet pipe is fixedly communicated with the bottom of the water washing tower. The other end of the bent pipe extends to the middle part of the inner cavity of the water washing tower and is fixedly installed with a spray head. The middle part of the outer surface of the bent pipe is fixedly communicated with a first drain pipe, and a first valve is fixedly installed on the first drain pipe. A second valve is fixedly installed on the bent pipe above the first drain pipe. A water receiving plate is fixedly installed on the inner wall of the water washing tower above the spray head. The right end of the water receiving plate is fixedly communicated with a second drain pipe, and a third valve is fixedly installed on the second drain pipe. A horizontal pipe is fixedly installed at the top on the left side of the water washing tower, and an exhaust pipe is fixedly installed at the top of the water washing tower.

[0006] Optionally, a gas-liquid separation tank is fixedly installed on the bracket on the left side of the water washing tower. A ventilation pipe is fixedly communicated with the left side of the gas-liquid separation tank, and a liquid discharge valve is fixedly installed at the bottom of the gas-liquid separation tank.

[0007] Optionally, a fan is fixedly installed on the bracket between the water washing tower and the gas-liquid separation tank. A first conduit and a second conduit are fixedly installed on the fan. The other end of the first conduit is fixedly communicated with the gas-liquid separation tank, and the other end of the second conduit is fixedly communicated with the water washing tower.

[0008] Optionally, a support plate is fixedly installed in the middle of the inner wall of the water washing tower, and a filler is fixedly installed on the top of the support plate.

[0009] Optionally, a tower plate is fixedly installed at the top of the inner wall of the water washing tower, and the tower plates are evenly distributed at the top of the inner wall of the water washing tower.

[0010] Optionally, a concentration detector is fixedly installed at the bottom on the right side of the water washing tower. The sensor of the concentration detector extends into the interior of the water washing tower, and the concentration detector is electrically connected to the first valve and the second valve.

[0011] Optionally, a liquid level gauge is fixedly installed on the water washing tower above the concentration detector. The sensor of the liquid level gauge extends into the interior of the water washing tower, and the liquid level gauge is electrically connected to the third valve.

[0012] Optionally, the filler is cylindrical, and the support plate is provided with water leakage holes.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. The utility model realizes two-stage spraying by setting a water pump, a water inlet pipe, a bent pipe, a water receiving plate and a second drain pipe. By starting the water pump, the water inlet pipe can extract the water source at the bottom of the inner cavity of the water scrubber, and after being transported through the bent pipe to the nozzle for spraying, it can perform a primary circulating spray on the tail gas. When the organic matter content in the water at the bottom of the inner cavity of the water scrubber reaches a certain concentration, it can be discharged from the first drain pipe for recovery. By introducing the water source into the water scrubber through the horizontal pipe, the water source can contact the rising tail gas to achieve a secondary spray. Finally, the water source flows into the water receiving plate and can be discharged from the second drain pipe, thereby realizing two-stage spraying, recovering the organic matter in the waste gas, and reducing the production cost.

[0015] 2. The utility model realizes the above functions by setting a gas-liquid separation tank, a ventilation pipe and a drain valve. By introducing the waste gas discharged from the vent line or the breathing valve in the storage tank into the gas-liquid separation tank through the ventilation pipe, the liquefied part of the waste gas is collected and recovered in the gas-liquid separation tank, and the gas part then enters the water scrubber through a fan for treatment. This can not only improve the recovery efficiency but also avoid the large treatment pressure brought by high-concentration waste gas entering the water scrubber.

[0016] 3. The utility model realizes the above functions by setting a concentration detector. Through the design of the concentration detector, the organic matter content in the water at the bottom of the inner cavity of the water scrubber can be monitored in real time. When the organic matter content in the water at the bottom of the inner cavity of the water scrubber reaches the set concentration, the first valve will be opened and the second valve will be closed, and the high-concentration wastewater will be pumped to the waste liquid tank for recovery through the first drain pipe, avoiding the situation that the circulating spray fails to achieve the due spraying effect due to the too high concentration of the wastewater at the bottom of the inner cavity of the water scrubber.

[0017] Through the following detailed description of the exemplary embodiments of the present utility model with reference to the accompanying drawings, other features and advantages of the present utility model will become clear. Description of the Drawings

[0018] Figure 1 is the structural schematic diagram provided by the present utility model;

[0019] Figure 2 is the cross-sectional structural schematic diagram inside the water scrubber provided by the present utility model;

[0020] Figure 3 is the back structural schematic diagram provided by the present utility model.

[0021] In the figure: 1. Bracket; 2. Water washing tower; 3. Water pump; 4. Water inlet pipe; 5. Elbow pipe; 6. Sprinkler head; 7. First drain pipe; 8. First valve; 9. Second valve; 10. Water receiving plate; 11. Second drain pipe; 12. Third valve; 13. Horizontal pipe; 14. Exhaust pipe; 15. Gas-liquid separation tank; 16. Vent pipe; 17. Drainage valve; 18. Fan; 19. First conduit; 20. Second conduit; 21. Support plate; 22. Packing; 23. Tray; 24. Concentration detector; 25. Liquid level gauge. Detailed implementation manners

[0022] In order to further understand the utility model content, characteristics and effects of the present utility model, the following embodiments are hereby exemplified and described in detail with reference to the accompanying drawings as follows.

[0023] As Figures 1 to 3 shown, a novel solvent storage tank tail gas treatment device provided by an embodiment of the present utility model includes a bracket 1, on which a water washing tower 2 and a water pump 3 are fixedly installed. The water pump 3 is fixedly installed with a water inlet pipe 4 and an elbow pipe 5. The water inlet pipe 4 is fixedly communicated with the bottom of the water washing tower 2. The other end of the elbow pipe 5 extends to the middle part of the inner cavity of the water washing tower 2 and is fixedly installed with a sprinkler head 6. The middle part of the outer surface of the elbow pipe 5 is fixedly communicated with a first drain pipe 7, on which a first valve 8 is fixedly installed. The elbow pipe 5 is fixedly installed with a second valve 9 above the first drain pipe 7. The inner wall of the water washing tower 2 is fixedly installed with a water receiving plate 10 above the sprinkler head 6. The right end of the water receiving plate 10 is fixedly communicated with a second drain pipe 11, on which a third valve 12 is fixedly installed. The top of the left side of the water washing tower 2 is fixedly installed with a horizontal pipe 13, and the top of the water washing tower 2 is fixedly installed with an exhaust pipe 14.

[0024] By starting the water pump 3, the water source at the bottom of the inner cavity of the water washing tower 2 can be extracted through the water inlet pipe 4, conveyed to the sprinkler head 6 through the elbow pipe 5 and sprayed to perform primary circulating spraying on the tail gas. When the content of organic matter in the water at the bottom of the inner cavity of the water washing tower 2 reaches a certain concentration, it can be discharged from the first drain pipe 7 for recovery. By introducing the water source into the water washing tower 2 through the horizontal pipe 13, the water source can contact the rising tail gas to achieve secondary spraying. Finally, the water source flows into the water receiving plate 10 and can be discharged from the second drain pipe 11, thus realizing two-stage spraying, recovering the organic matter in the waste gas, and reducing the production cost.

[0025] Furthermore, a gas-liquid separation tank 15 is fixedly installed on the bracket 1 on the left side of the water washing tower 2. The left side of the gas-liquid separation tank 15 is fixedly communicated with a vent pipe 16, and the bottom of the gas-liquid separation tank 15 is fixedly installed with a drainage valve 17.

[0026] By introducing the waste gas discharged from the evacuation pipeline or the breather valve in the storage tank into the gas-liquid separation tank 15 through the ventilation pipe 16, the liquefied part of the waste gas is collected and recycled in the gas-liquid separation tank 15, and the gas part enters the water scrubber 2 for treatment. This can not only increase the recovery efficiency but also avoid the large treatment pressure caused by high-concentration waste gas entering the water scrubber 2.

[0027] Further, a fan 18 is fixedly installed on the bracket 1 between the water scrubber 2 and the gas-liquid separation tank 15. A first conduit 19 and a second conduit 20 are fixedly installed on the fan 18. The other end of the first conduit 19 is fixedly connected to the gas-liquid separation tank 15, and the other end of the second conduit 20 is fixedly connected to the water scrubber 2.

[0028] By starting the fan 18, the waste gas inside the gas-liquid separation tank 15 can be extracted through the first conduit 19 and transported to the inside of the water scrubber 2 through the second conduit 20, so that the waste gas can be treated by the water scrubber 2.

[0029] Further, a support plate 21 is fixedly installed in the middle of the inner wall of the water scrubber 2, and a packing 22 is fixedly installed on the top of the support plate 21.

[0030] The function of the packing 22 is to provide a sufficient surface area. When the waste gas and the liquid continuously pass through the voids of the packing 22 in countercurrent, gas-liquid two-phase close contact will occur on the surface of the packing 22, thus improving the absorption efficiency.

[0031] Further, a tray 23 is fixedly installed at the top of the inner wall of the water scrubber 2, and the trays 23 are evenly distributed at the top of the inner wall of the water scrubber 2.

[0032] When the water source enters the water scrubber 2 through the horizontal pipe 13, it will gradually flow downward along the top of several trays 23, thus prolonging the time and distance for the water to flow to the water receiving plate 10. Furthermore, it can enable the water flow to fully contact the rising waste gas and improve the treatment effect on the waste gas.

[0033] Further, a concentration detector 24 is fixedly installed at the bottom on the right side of the water scrubber 2. The sensor of the concentration detector 24 extends into the inside of the water scrubber 2, and the concentration detector 24 is electrically connected to the first valve 8 and the second valve 9.

[0034] Through the design of the concentration detector 24, the organic matter content in the water at the bottom of the inner cavity of the water scrubber 2 can be monitored in real time. When the organic matter content in the water at the bottom of the inner cavity of the water scrubber 2 reaches the set concentration, the first valve 8 will be opened and the second valve 9 will be closed, and the high-concentration wastewater will be pumped to the waste liquid tank for recovery through the first drain pipe 7 to avoid the situation that the circulating spray cannot achieve the due spray effect due to the too high concentration of the wastewater at the bottom of the inner cavity of the water scrubber 2.

[0035] Further, a liquid level gauge 25 is fixedly installed on the water washing tower 2 above the concentration detector 24. The sensor of the liquid level gauge 25 extends into the interior of the water washing tower 2, and the liquid level gauge 25 is electrically connected to the third valve 12.

[0036] After the water at the bottom of the inner cavity of the water washing tower 2 is discharged from the first drain pipe 7, when the liquid level gauge 25 detects a low liquid level in the water washing tower 2, it will close the third valve 12, so that the water after the secondary spraying inside the water receiving plate 10 overflows from the water receiving plate 10 into the bottom of the inner cavity of the water washing tower 2 to continuously supplement the liquid level in the water washing tower 2, and then the primary spraying operation on the waste gas can be continued.

[0037] Further, the filler 22 is cylindrical, and the support plate 21 is provided with water leakage holes.

[0038] Working principle: First, the staff stores an appropriate amount of water source at the bottom of the inner cavity of the water washing tower 2. The staff passes the waste gas discharged from the evacuation pipeline or the breathing valve in the storage tank into the gas-liquid separation tank 15 through the ventilation pipe 16. The liquefied part of the waste gas is collected and recycled in the gas-liquid separation tank 15. Then, the fan 18 is started to send the gas part into the water washing tower 2, which can not only improve the subsequent recovery efficiency, but also avoid bringing a large treatment pressure due to the entry of high-concentration waste gas into the water washing tower 2. After the waste gas enters the water washing tower 2, at this time, the second valve 9 and the third valve 12 are in the open state, and the first valve 8 is in the closed state. The staff starts the water pump 3, so that the water inlet pipe 4 extracts the water source at the bottom of the inner cavity of the water washing tower 2 and transports it to the nozzle 6 through the elbow 5 for spraying to perform the primary circulating spraying on the tail gas. At the same time, the staff passes the water source into the water washing tower 2 from the horizontal pipe 13, and the water flows down along the tray 23 to perform the secondary spraying on the rising waste gas. The low-concentration water source after the secondary spraying is directly discharged to the sewage system from the water receiving plate 10 and the second drain pipe 11, and the treated waste gas is discharged from the exhaust pipe 14. When the concentration detector 24 detects that the organic matter content in the water at the bottom of the inner cavity of the water washing tower 2 reaches the set concentration, it will open the first valve 8 and close the second valve 9, and discharge the high-concentration waste water to the waste liquid tank for recovery through the first drain pipe 7 to avoid the excessive concentration of the waste water at the bottom of the inner cavity of the water washing tower 2 resulting in the failure of the circulating spraying to achieve the due spraying effect. When the liquid level gauge 25 detects a low liquid level in the water washing tower 2, it will close the third valve 12, so that the water after the secondary spraying inside the water receiving plate 10 overflows from the water receiving plate 10 into the bottom of the inner cavity of the water washing tower 2 to continuously supplement the liquid level in the water washing tower 2, and then the primary spraying operation on the waste gas can be continued.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel solvent storage tank tail gas treatment device, comprising a bracket (1), on which a water scrubber (2) and a water pump (3) are fixedly mounted, characterized in that: A water inlet pipe (4) and an elbow (5) are fixedly mounted on the water pump (3); the water inlet pipe (4) is fixedly connected to the bottom of the water washing tower (2); the other end of the elbow (5) extends to the middle of the inner cavity of the water washing tower (2) and is fixedly mounted with a nozzle (6); the middle of the outer surface of the elbow (5) is fixedly connected to a first drainage pipe (7); a first valve (8) is fixedly mounted on the first drainage pipe (7); a second valve (9) located above the first drainage pipe (7) is fixedly mounted on the elbow (5); a water receiving plate (10) located above the nozzle (6) is fixedly mounted on the inner wall of the water washing tower (2); a second drainage pipe (11) is fixedly connected to the right end of the water receiving plate (10); a third valve (12) is fixedly mounted on the second drainage pipe (11); a transverse pipe (13) is fixedly mounted on the top of the left side of the water washing tower (2); and an exhaust pipe (14) is fixedly mounted on the top of the water washing tower (2).

2. A novel solvent storage tank tail gas treatment device according to claim 1, characterized in that: A gas-liquid separation tank (15) located on the left side of the water washing tower (2) is fixedly mounted on the bracket (1), a vent pipe (16) is fixedly connected to the left side of the gas-liquid separation tank (15), and a drain valve (17) is fixedly mounted on the bottom of the gas-liquid separation tank (15).

3. A novel solvent storage tank tail gas treatment device according to claim 1, characterized in that: A fan (18) located between the water washing tower (2) and the gas-liquid separation tank (15) is fixedly mounted on the bracket (1), and a first conduit (19) and a second conduit (20) are fixedly mounted on the fan (18); the other end of the first conduit (19) is fixedly connected to the gas-liquid separation tank (15), and the other end of the second conduit (20) is fixedly connected to the water washing tower (2).

4. A novel solvent storage tank tail gas treatment device according to claim 1, characterized in that: A support plate (21) is fixedly mounted in the middle of the inner wall of the water washing tower (2), and a filler (22) is fixedly mounted on the top of the support plate (21).

5. A novel solvent storage tank tail gas treatment device according to claim 1, characterized in that: A tower plate (23) is fixedly mounted on the top of the inner wall of the water washing tower (2), and the tower plates (23) are evenly distributed on the top of the inner wall of the water washing tower (2).

6. A novel solvent storage tank tail gas treatment device according to claim 1, characterized in that: A concentration detector (24) is fixedly installed at the bottom of the right side of the water washing tower (2). The sensor of the concentration detector (24) extends into the interior of the water washing tower (2). The concentration detector (24) is electrically connected to the first valve (8) and the second valve (9).

7. A novel solvent storage tank tail gas treatment device according to claim 1, characterized in that: A liquid level meter (25) located above the concentration detector (24) is fixedly mounted on the water washing tower (2), a sensor of the liquid level meter (25) extends into the interior of the water washing tower (2), and the liquid level meter (25) is electrically connected to the third valve (12).

8. A novel solvent storage tank tail gas treatment device according to claim 4, characterized in that: The filler (22) is cylindrical, and the support plate (21) is provided with a water leakage hole.

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