Waste gas treatment device

Abstract

The utility model relates to the field of waste gas treatment. The waste gas treatment device comprises an absorption tank, a partition plate, a driving part and a control part, the absorption tank comprises a tank body, an absorption liquid water tank, a spraying part and a liquid return pipe, a gas inlet pipe comprises a gas inlet valve, a liquid guide plate is connected to the upper portion of a gas inlet, the liquid guide plate is obliquely arranged from the center to the outer side, and the spraying part comprises a plurality of spraying openings and spraying pipes. The spraying nozzle is communicated to the absorption liquid water tank, the liquid return pipe is arranged on one side in the tank body, one end of the liquid return pipe is communicated to the absorption liquid water tank, the partition plates comprise partition plate holes and a plurality of driving parts, and the driving parts comprise baffles. The baffle is driven by the driving piece to move, the contact time of absorption liquid and waste gas is controlled by controlling the opening and closing size of the partition plate holes, and the contact time of gas and liquid can be adjusted under the condition that the efficiency is guaranteed. The absorption liquid is separated by the liquid guide plate, so that the absorption liquid is prevented from entering the air inlet pipe to block the air inlet pipe and the air inlet.

Description

Technical Field

[0001] The present application relates to the field of waste gas treatment, and in particular to a waste gas treatment device. Background Art

[0002] An absorption tower is a device used to realize gas-liquid phase absorption operation. It is widely used in environmental protection and chemical production, and is mainly used to purify harmful components in waste gas and industrial gas. Its working principle is to use the mass transfer between gas and liquid phases so that pollutants in the gas phase are absorbed by the liquid phase absorbent, thereby achieving the purpose of separation and purification. The gas-liquid two-phase flow mode in the absorption tower usually adopts countercurrent operation to improve the absorption efficiency, that is, the absorbent is added from the top of the tower and flows downward, while the treated gas enters from the bottom of the tower and flows upward, which can ensure the maximum relative movement and contact area between the gas and liquid phases, thereby completing the absorption process more effectively.

[0003] The patent with application number: CN201720437950.X discloses an absorption tower, including a tower body, an air outlet, a first liquid outlet, an air inlet, a distributor and a spray device. The top of the tower body is provided with an air outlet. The lower part of the tower body is provided with an air inlet. The bottom of the tower body is provided with a first liquid outlet. The upper part of the tower body is provided with a spray device. The middle part of the tower body is provided with a distributor. According to the specific composition and concentration of harmful substances in the exhaust gas, it is necessary to timely adjust the contact time between gas and liquid under the premise of ensuring efficiency. However, it is difficult to ensure efficiency by only adjusting the spraying amount and the air intake amount to ensure the absorption of harmful substances in the exhaust gas. The absorption tower of the prior art cannot adjust the contact time between gas and liquid under the premise of ensuring efficiency. Moreover, when the absorption tower of the prior art absorbs exhaust gas, the exhaust gas contains not only gaseous harmful substances but also often carries dust. When these dusts enter the absorption tower and contact with the liquid in the absorption tower, they will form sludge at the liquid outlet to block the liquid outlet. The air inlet of the prior art cannot ensure that the exhaust gas is evenly distributed in the absorption tower. Utility Model Content

[0004] In order to address the deficiencies of the prior art, the present application provides a waste gas treatment device that can adjust the contact time between gas and liquid, will not block the air inlet, and can ensure that the waste gas is evenly distributed in the absorption tower.

[0005] The utility model discloses an exhaust gas treatment device, which comprises an absorption tank, a partition, a driving member and a control member. The absorption tank comprises a tank body, an absorption liquid water tank, a spraying member and a liquid return pipe. The bottom of the tank body is depressed downward to form a groove. The tank body comprises an air outlet arranged near the top of the tank body and an air inlet pipe arranged near the bottom of the tank body. The air inlet pipe comprises an air inlet valve. The air inlet of the air inlet pipe is directed upward. A liquid guide plate is fixedly connected above the air inlet. The liquid guide plate is inclined from the center to the outside. The absorption liquid water tank is arranged in the tank body near the top of the tank body. The spraying member comprises a plurality of spraying ports and spraying pipes. The spraying ports are connected by a plurality of spraying ports. The spray pipe is connected to the absorption liquid tank, the return pipe is arranged on one side inside the tank body, one end of the return pipe is connected to the absorption liquid tank, the partition includes several partitions, the partition is arranged between the air inlet and the air outlet in the tank body, the partition includes several partition holes and several driving parts arranged on one side of the partition holes, the driving part includes several baffles that are moved by the driving part to block the partition holes, the driving member is arranged on one side outside the tank body, the driving member includes a driving rod, several driving parts are connected to the driving rod, the driving member is connected to the air inlet valve, the return pipe and the spray member, the control member is arranged on one side outside the tank body, and the control member is connected to the driving member.

[0006] Furthermore, the air inlet pipes include at least three, and the air inlet pipes are evenly distributed in the absorption tank.

[0007] Furthermore, the tank body also includes an umbrella-shaped air guide member arranged on the air outlet, and a condenser is arranged on the outside of the tank body, and the condenser is connected to the air guide member.

[0008] Furthermore, the distance H between the air inlet of the air inlet pipe and the bottom of the tank body is greater than or equal to 0.8m and less than or equal to 1.2m, and the distance h between the end of the return pipe away from the absorbent water tank and the bottom of the tank body is greater than or equal to 0.5m and less than 0.6m.

[0009] Furthermore, the distance L between the center of the liquid guide plate and the center of the air inlet is greater than or equal to 3 cm and less than or equal to 6 cm, the vertical direction of the tank body is the vertical line, the plane perpendicular to the vertical line is the horizontal plane, the projection of the liquid guide plate on the horizontal plane is the horizontal plane projection, the projection of the air inlet on the horizontal plane is the air inlet projection, the ratio of the area of ​​the horizontal plane projection to the area of ​​the air inlet projection is 1.3-1.5:1, the extension direction of the liquid guide plate from the center to the outside is the liquid guide plate extension line, and the angle α between the liquid guide plate extension line and the vertical line is greater than or equal to 30° and less than or equal to 60°.

[0010] Furthermore, the tank body comprises a liquid outlet pipe, which runs through the bottom of the tank body. The liquid outlet pipe comprises a liquid outlet valve, which is electrically connected to the driving component.

[0011] Furthermore, a water level gauge for monitoring the water level inside the tank is arranged on the outside of the tank.

[0012] Furthermore, the outer side of the tank body includes an alarm component, which is connected to a water level meter and a driving component. When the water level meter monitors that the water level in the tank body exceeds the alarm water level, the alarm component alarms and the spraying component stops spraying.

[0013] Furthermore, the alarm water level is 80% of the distance from the air inlet to the bottom of the tank.

[0014] Beneficial effects of the utility model:

[0015] The present application sets a plurality of baffles with a plurality of baffles that are moved by a driving part to block the baffle holes in the tank body of the absorption tank, controls the moving driving part by a control part to drive the movement of the baffle, controls the opening and closing size of the baffle holes by the movement of the baffle to control the contact time between the absorption liquid and the exhaust gas, and can adjust the opening and closing size of the baffle holes according to the concentration of harmful substances in the exhaust gas, so as to adjust the contact time between the gas and the liquid while ensuring the efficiency. The present application fixes a liquid guide plate that is tilted from the center to the outside above the air inlet pipe at the bottom of the tank body, separates the absorption liquid by the set liquid guide plate, prevents the absorption liquid from entering the air inlet pipe and blocking the air inlet pipe and the air inlet, and increases the service life of the exhaust gas absorption device.

[0016] The present application also sets at least three evenly distributed air inlet pipes at the bottom of the tank body of the absorption tank. The even distribution of the air inlet pipes at the bottom of the tank body can make the exhaust gas entering the tank body more even, so that the absorption liquid in the tank body of the absorption tank absorbs the exhaust gas more evenly, and prevents the harmful components in the exhaust gas from being incompletely absorbed and discharged to the outside due to the uneven exhaust gas in the tank body, causing external environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a cross-sectional structure of an exhaust gas treatment device in an embodiment of the present application.

[0018] Figure 2 It is a schematic diagram of the structure of a partition in an embodiment of the present application.

[0019] Exhaust gas treatment device 100, absorption tank 11, tank body 12, air inlet pipe 121, air inlet valve 1211, liquid guide plate 1212, air guide member 122, condenser 123, liquid outlet pipe 124, liquid outlet valve 1241, water level gauge 125, alarm member 126, absorption liquid tank 13, spray member 14, spray port 141, spray pipe 142, return liquid pipe 15, partition 16, drive unit 161, baffle 162, drive member 17, drive rod 171, control member 18. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the specific implementation manner of the utility model will be clearly and completely described below.

[0021] The utility model discloses an exhaust gas treatment device 100, which includes: an absorption tank 11, a partition 16, a driving member 17 and a control member 18. The absorption tank 11 includes a tank body 12, an absorption liquid water tank 13, a spray member 14 and a liquid return pipe 15. The bottom of the tank body 12 is depressed downward to form a groove, and the groove is used to collect the absorption liquid in the tank body 12. The tank body 12 includes an air outlet arranged near the top of the tank body 12 and an air inlet pipe 121 arranged near the bottom of the tank body 12. The air inlet pipe 121 is used to introduce exhaust gas with harmful gases from the external environment into the tank body 12, and the air outlet is used to discharge the exhaust gas treated by the exhaust gas treatment device 100 from the inside of the tank body 12. The air inlet pipe 121 includes an air inlet valve 1211. The air inlet of the air inlet pipe 121 is directed upward. A liquid guide plate 1212 is fixedly connected above the air inlet. The liquid guide plate 1212 is tilted from the center to the outside. The air inlet pipe 121 controls the external gas to enter the exhaust gas treatment device 100 through the air inlet valve 1211. The liquid guide plate 1212 is used to prevent the absorption liquid flowing down from the upper part of the tank body 12 from entering the air inlet pipe 121, thereby causing the absorption liquid and the dust in the exhaust gas to combine and block the air inlet pipe 121 and the air inlet due to long-term use. The absorption liquid tank 13 is arranged in the tank body 12 near the upper part of the tank body 12. The absorption liquid tank 13 is used to store the absorption liquid. The spray component 14 includes a plurality of spray ports 141 and a spray pipe 142. The spray ports 141 are connected to the absorption liquid tank 13 through the spray pipe 142. The spray component 14 is used to control the spraying of the absorption liquid. The liquid return pipe 15 is arranged on one side of the tank body 12, and one end of the liquid return pipe 15 is connected to the absorption liquid tank 13. Because the absorption liquid is sprayed from the exhaust gas treatment device 100 from top to bottom, when treating some exhaust gases with less harmful substances, the absorption liquid absorbs less harmful substances. Direct discharge of the absorption liquid will cause waste of the absorption liquid. The liquid return pipe 15 is set for circulating absorption and utilization of the absorption liquid. Whether to use the liquid return pipe 15 in this application is selected according to the concentration of harmful substances in the exhaust gas. The partition 16 includes a plurality of partitions 16, which are arranged between the air inlet and the air outlet in the tank body 12. The partition 16 includes a plurality of partition 16 holes and a plurality of driving parts 161 arranged on one side of the partition 16 holes. The driving part 161 includes a plurality of baffles 162 which are moved by the driving part 161 to block the partition 16 holes. The partition 16 and the partition 16 holes are arranged to increase the residence time of the absorption liquid. When the absorption liquid falls from the top of the tank body 12, it will be blocked by the partition 16. The absorption liquid and the exhaust gas can only flow through the partition 16 holes. The driving part 161 and the baffle 162 are used to control the opening and closing size of the partition 16 holes, and to control the specific residence time of the absorption liquid. When treating exhaust gas with a lot of harmful substances, the residence time of the absorption liquid can be increased by reducing the opening and closing of the baffle 162 holes, thereby better absorbing the harmful substances in the exhaust gas.The driving member 17 is arranged on one side outside the tank body 12, and the driving member 17 includes a driving rod 171. A plurality of driving parts 161 are connected to the driving rod 171. The driving member 17 is connected to the air inlet valve 1211, the return liquid pipe 15 and the shower spray member 14. The driving member 17 controls the movement of the baffle 162 through the driving rod 171, thereby controlling the opening and closing size of the hole of the partition 16, thereby controlling the residence time. The control member 18 is arranged on one side outside the tank body 12, and the control member 18 is connected to the driving member 17. The control member 18 controls the air inlet valve 1211, the return liquid pipe 15 and the shower spray member 14 by controlling the driving member 17. The present application sets a plurality of baffles 16 with a plurality of baffles 162 that are moved by a driving part 161 to block the holes of the baffles 16 in the tank body 12 of the absorption tank 11, controls the moving driving part 17 by the control part 18 to drive the baffles 162 to move, controls the opening and closing size of the holes of the baffles 16 by the movement of the baffles 162 to control the contact time between the absorption liquid and the exhaust gas, and can adjust the opening and closing size of the holes of the baffles 16 according to the concentration of harmful substances in the exhaust gas, so as to adjust the contact time between the gas and the liquid while ensuring the efficiency. The present application fixes a liquid guide plate 1212 that is tilted from the center to the outside above the air inlet pipe 121 at the bottom of the tank body 12, and separates the absorption liquid by the set liquid guide plate 1212 to prevent the absorption liquid from entering the air inlet pipe 121 and blocking the air inlet pipe 121 and the air inlet, thereby increasing the service life of the exhaust gas absorption device.

[0022] As an implementation mode, the air inlet pipes 121 include at least three, and the air inlet pipes 121 are evenly distributed in the absorption tank 11. The present application also sets at least three evenly distributed air inlet pipes 121 at the bottom of the tank body 12 of the absorption tank 11. The even distribution of the air inlet pipes 121 at the bottom of the tank body 12 can make the exhaust gas entering the tank body 12 more uniform, so that the absorption liquid in the tank body 12 of the absorption tank 11 absorbs the exhaust gas more uniformly, and prevents the situation in which the harmful components in the exhaust gas are not completely absorbed and discharged to the outside due to the uneven exhaust gas in the tank body 12, causing external environmental pollution.

[0023] As an embodiment, the tank body 12 also includes an umbrella-shaped air guide 122 arranged on the air outlet, and a condenser 123 is arranged on the outside of the tank body 12, and the condenser 123 is connected to the air guide 122. The air guide 122 arranged on the air outlet is used to guide the absorbed and purified waste gas to be discharged from the air outlet on the one hand, and to make the air outlet have a certain downward tilt angle on the other hand, so as to prevent the absorption liquid sprayed from the spray port 141 from being discharged from the air outlet. The condenser 123 is provided to cool the air guide 122. The cooled air guide 122 can make the absorption liquid in the waste gas condense on the air guide 122, and flow back to the tank body 12 of the absorption tank 11 through the air guide 122, so as to realize the recycling of the absorption liquid.

[0024] As an implementation method, the distance H between the air inlet of the air inlet pipe 121 and the bottom of the tank body 12 is greater than or equal to 0.8m and less than or equal to 1.2m, and the distance h between the end of the return pipe 15 away from the absorbent water tank and the bottom of the tank body 12 is greater than or equal to 0.5m and less than 0.6m. The exhaust gas not only contains harmful components in gaseous form but also often carries dust, which will form sludge at the bottom of the tank body 12 after contacting with the absorption liquid. In order to prevent the sludge from clogging the air inlet pipe 121 and the return pipe 15, the distance H between the air inlet of the air inlet pipe 121 and the bottom of the tank body 12 is greater than or equal to 0.8m and less than or equal to 1.2m, and the distance h between the end of the return pipe 15 away from the absorbent water tank and the bottom of the tank body 12 is greater than or equal to 0.5m and less than 0.6m. Further, the distance H between the air inlet of the air inlet pipe 121 and the bottom of the tank body 12 is set to be greater than or equal to 0.9m and less than or equal to 1.1m, and the distance h between the end of the return pipe 15 away from the absorbent water tank and the bottom of the tank body 12 is greater than or equal to 0.5m and less than 0.6m. Furthermore, the distance H between the air inlet of the air inlet pipe 121 and the bottom of the tank body 12 is set to be 1m.

[0025] As an implementation mode, the distance L between the center of the liquid guide plate 1212 and the center of the air inlet is greater than or equal to 3 cm and less than or equal to 6 cm, the vertical direction of the tank body 12 is the vertical line, the plane perpendicular to the vertical line is the horizontal plane, the projection of the liquid guide plate 1212 on the horizontal plane is the horizontal plane projection, the projection of the air inlet on the horizontal plane is the air inlet projection, the ratio of the area of ​​the horizontal plane projection to the area of ​​the air inlet projection is 1.3-1.5:1, the extension direction of the liquid guide plate 1212 from the center to the outside is the extension line of the liquid guide plate 1212, and the angle α between the extension line of the liquid guide plate 1212 and the vertical line is greater than or equal to 30° and less than or equal to 60°. The distance between the center of the liquid guide plate 1212 and the center of the air inlet is the distance between the liquid guide plate 1212 and the air inlet. In order to prevent the absorption liquid from entering the air inlet pipe 121 from the air inlet, the distance L between the center of the liquid guide plate 1212 and the center of the air inlet is set to be greater than or equal to 3 cm and less than or equal to 6 cm. When L is less than 3 cm or α is greater than 60°, the liquid guide plate 1212 will affect the air intake of the air inlet. When L is greater than 3 cm or α is less than 30°, the absorption liquid easily enters the air inlet pipe 121 from the air inlet. Further, the distance L between the center of the liquid guide plate 1212 and the center of the air inlet is greater than or equal to 4 cm and less than or equal to 5 cm, and the angle α between the extension line of the liquid guide plate 1212 and the vertical line is greater than or equal to 40° and less than or equal to 50°. Further, the distance L between the center of the liquid guide plate 1212 and the center of the air inlet is 4.5 cm, and the angle α between the extension line of the liquid guide plate 1212 and the vertical line is 45°.

[0026] As an embodiment, the tank body 12 includes a liquid outlet pipe 124, which extends to the bottom of the tank body 12. The liquid outlet pipe 124 includes a liquid outlet valve 1241, and the liquid outlet valve 1241 is electrically connected to the driving member 17. The liquid outlet pipe 124 is used to discharge the absorption liquid that has fully absorbed the harmful substances and the sludge accumulated in the tank body 12. The driving member 17 controls the opening and closing of the liquid outlet pipe 124 by controlling the liquid outlet valve 1241.

[0027] As an embodiment, a water level gauge 125 for monitoring the water level inside the tank body 12 is provided on the outside of the tank body 12. The water level gauge 125 is used to detect the water level inside the tank body 12 to prevent the absorption liquid from entering the air inlet 121 from the air inlet when the water level inside the tank body 12 is too high.

[0028] As an embodiment, the outer side of the tank body 12 includes an alarm member 126, which is connected to the water level meter 125 and the driving member 17. When the water level in the tank body 12 monitored by the water level meter 125 exceeds the alarm water level, the alarm member 126 alarms and the spraying member 14 stops spraying. The alarm water level is 80% of the distance from the air inlet to the bottom of the tank body 12. By setting the alarm member 126, it is not necessary to manually detect the water level of the absorption liquid, saving manpower.

[0029] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. An exhaust gas treatment device, characterized in that: include: The absorption tank comprises a tank body, an absorption liquid water tank, a spraying part and a liquid return pipe. The bottom of the tank body is concave downward to form a groove. The tank body comprises an air outlet arranged near the top of the tank body and an air inlet pipe arranged near the bottom of the tank body. The air inlet pipe comprises an air inlet valve. The air inlet of the air inlet pipe faces upward. A liquid guide plate is fixedly connected above the air inlet. The liquid guide plate is inclined from the center to the outside. The absorption liquid water tank is arranged in the tank body near the top of the tank body. The spraying part comprises a plurality of spraying ports and a spraying pipe. The spraying ports are connected to the absorption liquid water tank through the spraying pipe. The liquid return pipe is arranged on one side of the tank body, and one end of the liquid return pipe is connected to the absorption liquid water tank. A plurality of baffles, the baffles are arranged between the air inlet and the air outlet in the tank body, the baffles include a plurality of baffle holes and a plurality of driving parts arranged on one side of the baffle holes, and the driving parts include a plurality of baffles that are moved by the driving parts to block the baffle holes; A driving member, which is arranged on one side outside the tank body, comprises a driving rod, a plurality of driving parts are connected to the driving rod, and the driving member is connected to the air inlet valve, the liquid return pipe and the shower spray member; A control member is arranged on one side outside the tank body, and the control member is connected to the driving member.

2. The exhaust gas treatment device according to claim 1, characterized in that: The air inlet pipes include at least three, and the air inlet pipes are evenly distributed in the absorption tank.

3. The exhaust gas treatment device according to claim 1, characterized in that: The tank body also includes an umbrella-shaped air guide member arranged on the air outlet, and a condenser is arranged on the outer side of the tank body, and the condenser is connected to the air guide member.

4. The exhaust gas treatment device according to claim 1, characterized in that: The distance H between the air inlet of the air inlet pipe and the bottom of the tank body is greater than or equal to 0.8m and less than or equal to 1.2m, and the distance h between the end of the return pipe away from the absorbent water tank and the bottom of the tank body is greater than or equal to 0.5m and less than 0.6m.

5. The exhaust gas treatment device according to claim 1, characterized in that: The distance L between the center of the liquid guide plate and the center of the air inlet is greater than or equal to 3 cm and less than or equal to 6 cm. The vertical direction of the tank body is the vertical line, the plane perpendicular to the vertical line is the horizontal plane, the projection of the liquid guide plate on the horizontal plane is the horizontal plane projection, the projection of the air inlet on the horizontal plane is the air inlet projection, the ratio of the area of ​​the horizontal plane projection to the area of ​​the air inlet projection is 1.3-1.5:1, the extension direction of the liquid guide plate from the center to the outside is the liquid guide plate extension line, and the angle α between the liquid guide plate extension line and the vertical line is greater than or equal to 30° and less than or equal to 60°.

6. The exhaust gas treatment device according to claim 1, characterized in that: The tank body comprises a liquid outlet pipe, which runs through the bottom of the tank body. The liquid outlet pipe comprises a liquid outlet valve, which is electrically connected to the driving component.

7. The exhaust gas treatment device according to claim 1, characterized in that: A water level gauge for monitoring the water level inside the tank is arranged on the outside of the tank.

8. The exhaust gas treatment device according to claim 7, characterized in that: The outer side of the tank body includes an alarm component, which is connected to a water level meter and a driving component. When the water level in the tank body monitored by the water level meter exceeds the alarm water level, the alarm component alarms and the spraying component stops spraying.

9. The exhaust gas treatment device according to claim 8, characterized in that: The alarm water level is 80% of the distance from the air inlet to the bottom of the tank.

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