Waste gas washing tower

Abstract

The utility model discloses a waste gas washing tower, which relates to the technical field of waste gas treatment and comprises a tower body, a first water rotating barrel, a second water rotating barrel, a fan and a washing component, a maintenance channel is arranged above the tower body, the first water rotation barrel and the second water rotation barrel are both installed at the bottom of the maintenance channel, and the first water rotation barrel and the second water rotation barrel are both communicated with the maintenance channel; a gas inlet pipe is arranged on the side wall of the tower body, the gas inlet pipe is communicated with the first water rotating barrel, and an arc-shaped flow guide plate is arranged in the overhaul channel located above the first water rotating barrel. According to the scheme, by arranging a secondary washing structure, waste gas entering the tower body is washed in sequence, so that the amount of paint mist entering a subsequent pipeline and waste gas treatment equipment is reduced, and the paint mist amount is reduced; therefore, the maintenance frequency of subsequent pipelines and waste gas treatment equipment is reduced, and the maintenance cost is reduced; meanwhile, the two washing processes are carried out in the water rotating barrel, washing dead angles can be avoided to the maximum extent, and all-directional washing is achieved.

Description

Technical Field

[0001] This utility model relates to a waste gas scrubbing tower, belonging to the field of waste gas treatment technology. Background Technology

[0002] In industrial painting processes, spray booths generate large amounts of waste gas containing pollutants such as paint mist and organic solvents. To reduce the environmental pollution caused by this waste gas, a water-cooled vortex tower is typically used for pretreatment.

[0003] Due to the high viscosity and wide particle size distribution of paint mist particles, it is difficult for water vortex towers to completely capture and separate paint mist in a single washing process. Dead zones are easily formed inside the tower, and some paint mist that is not captured by the water curtain will continue to move forward with the airflow and enter the terminal exhaust gas treatment equipment, adhering to the internal components of the exhaust equipment and the inner wall of the exhaust duct, increasing the later maintenance costs of the exhaust equipment and pipelines. Therefore, a new solution is needed to solve this problem. Utility Model Content

[0004] The purpose of this invention is to provide a waste gas scrubbing tower to overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a waste gas scrubbing tower, comprising a tower body, a first water swirl tank, a second water swirl tank, a fan, and scrubbing components; a maintenance passage is provided above the tower body, the first and second water swirl tanks are both installed at the bottom of the maintenance passage and are connected to the maintenance passage; an air inlet pipe is provided on the side wall of the tower body, the air inlet pipe is connected to the first water swirl tank, an arc-shaped guide plate is provided in the maintenance passage above the first water swirl tank, a guide pipe is provided between the first and second water swirl tanks, the upper end of the guide pipe extends into the maintenance passage and cooperates with the arc-shaped guide plate, and the lower end of the guide pipe is connected to the second water swirl tank; an exhaust pipe is provided above the maintenance passage and is connected to the maintenance passage; the fan is located on one side of the tower body and is connected to the exhaust pipe.

[0006] The washing assembly includes a main water supply pipe, a circulation pump, a first branch pipe, and a second branch pipe. The main water supply pipe is connected to the circulation pump. The first branch pipe and the second branch pipe are both connected to the main water supply pipe. The first branch pipe is located inside a first water vortex tank, and the second branch pipe is located inside a second water vortex tank. A first nozzle is provided at the top of the first branch pipe, and a second nozzle is provided at the top of the second branch pipe.

[0007] Preferably, a water collection tank is provided at the bottom inner part of the tower body, and a circulating water pipe is provided on the outer side of the tower body. One end of the circulating water pipe is connected to the water collection tank, and the other end of the circulating water pipe is connected to the main water supply pipeline.

[0008] Preferably, a filter screen is installed at one end of the water collection tank near the circulating water pipe.

[0009] Preferably, a baffle plate is provided between the bottom of the maintenance passage and the top of the exhaust pipe.

[0010] Preferably, both the first branch pipe and the second branch pipe are equipped with control valves.

[0011] Preferably, both the first nozzle and the second nozzle are made of PVC.

[0012] Preferably, the circulating pump is a vertical acid and alkali resistant pump.

[0013] Preferably, the tower body is made of SUS304 acid and alkali resistant material.

[0014] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0015] This utility model discloses a waste gas scrubbing tower that uses a two-stage scrubbing structure to sequentially scrub the waste gas entering the tower, thereby reducing the amount of paint mist entering subsequent pipelines and waste gas treatment equipment. This reduces the frequency of maintenance for subsequent pipelines and waste gas treatment equipment, and lowers maintenance costs. At the same time, both scrubbing processes are carried out in a water vortex tank, which can minimize scrubbing dead corners and achieve all-round scrubbing. Attached Figure Description

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0017] Appendix Figure 1 This is a schematic diagram of the structure of a waste gas scrubbing tower according to the present invention;

[0018] Appendix Figure 2 For the appendix Figure 1 Enlarged view of point A in the middle;

[0019] Appendix Figure 3 This is a top view of a waste gas scrubbing tower according to the present invention;

[0020] Appendix Figure 4 This is a side view of a waste gas scrubbing tower according to the present invention.

[0021] In the diagram: 1. Tower body; 11. Maintenance passage; 111. Arc-shaped guide plate; 12. Air inlet pipe; 13. Exhaust pipe; 14. Fan; 15. Water collection tank; 151. Filter screen; 16. Circulating water pipe; 2. First water vortex tank; 3. Second water vortex tank; 4. Main water supply pipe; 5. Circulating pump; 6. First branch pipe; 61. First nozzle; 7. Second branch pipe; 71. Second nozzle; 8. Control valve; 9. Guide pipe; 10. Water baffle. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] As attached Figure 1-4 As shown, the exhaust gas scrubbing tower of this utility model is applied at the rear end of the paint spraying chamber. It can be connected to the paint spraying chamber by a pipeline and is used to scrub the paint mist generated in the paint spraying chamber. It includes a tower body 1, a first water swirl tank 2, a second water swirl tank 3, a fan 14 and a scrubbing assembly.

[0024] In this embodiment, the tower body 1 is made of SUS304 acid and alkali resistant material. The acid and alkali resistance of this material effectively ensures the service life of the tower body 1.

[0025] A maintenance passage 11 is provided above the tower body 1. The first water swirl tank 2 and the second water swirl tank 3 are both installed at the bottom of the maintenance passage 11 and are connected to the maintenance passage 11. In this embodiment, the first water swirl tank 2 and the second water swirl tank 3 can be connected to the maintenance passage 11 by setting an opening at the bottom of the maintenance passage 11. An air inlet pipe 12 is provided on the side wall of the tower body 1 and is connected to the first water swirl tank 2. The exhaust gas containing paint mist from the paint spraying room is transported to the first water swirl tank 2 through the air inlet pipe 12.

[0026] An arc-shaped guide plate 111 is installed in the maintenance passage 11 located above the first water swirl tank 2. A guide pipe 9 is installed between the first water swirl tank 2 and the second water swirl tank 3. The upper end of the guide pipe 9 extends into the maintenance passage 11 and cooperates with the arc-shaped guide plate 111. The lower end of the guide pipe 9 is connected to the second water swirl tank 3 to realize the flow of exhaust gas from the first water swirl tank 2 to the second water swirl tank 3. An exhaust pipe 13 is installed above the maintenance passage 11 and is connected to the maintenance passage 11. The connection between the exhaust pipe 13 and the maintenance passage 11 can be realized by setting an opening on the top surface of the maintenance passage 11. The fan 14 is located on one side of the tower body 1 and is connected to the exhaust pipe 13.

[0027] In this embodiment, the exhaust pipe 13 is horizontally arranged above the maintenance passage 11, but in actual application, the exhaust pipe 13 can also be inclined or vertically arranged.

[0028] During operation, exhaust gas containing paint mist enters the first water swirl tank 2 through the inlet pipe 12. The exhaust gas flows upward and, blocked by the arc-shaped guide plate 111, flows downward and enters the guide pipe 9. Subsequently, the exhaust gas enters the second water swirl tank 3 through the guide pipe 9. The exhaust gas in the second water swirl tank 3 flows upward, passes through the maintenance passage 11, and enters the exhaust pipe 13. Driven by the fan 14, it is discharged outside the exhaust pipe 13. Please refer to appendix 1. The flow path of the exhaust gas in the tower body 1 is shown by arrows and is generally S-shaped. The fan 14 draws the exhaust gas into the exhaust pipe 13, creating a negative pressure in the exhaust pipe 13. This causes the exhaust gas in the tower body 1 to flow into the exhaust pipe 13. In other words, the fan 14 provides the driving force for the flow of exhaust gas in the tower body 1.

[0029] The washing assembly includes a main water supply pipe 4, a circulation pump 5, a first branch pipe 6, and a second branch pipe 7. The main water supply pipe 4 works in conjunction with the circulation pump 5, which drives the water flow within the main water supply pipe 4. In this embodiment, the circulation pump 5 is a vertical acid and alkali resistant pump to avoid corrosion and extend its service life.

[0030] The first branch pipe 6 and the second branch pipe 7 are both connected to the main water supply pipe 4, and the first branch pipe 6 is located inside the first water swirl tank 2, while the second branch pipe 7 is located inside the second water swirl tank 3. The top end of the first branch pipe 6 is provided with a first nozzle 61, and the top end of the second branch pipe 7 is provided with a second nozzle 71. In this embodiment, both the first nozzle 61 and the second nozzle 71 are made of PVC. On the one hand, PVC material has strong corrosion resistance, which can ensure the service life of the nozzle. On the other hand, PVC material has low cost and good processing performance, which can save material costs and facilitate later maintenance and replacement.

[0031] Control valves 8 are provided on the first branch pipe 6 and the second branch pipe 7 to control the opening or closing of the first nozzle 61 and the second nozzle 71 respectively.

[0032] During operation, the exhaust gas first enters the first water vortex tank 2. The first nozzle 61 sprays water to wash the exhaust gas in the first water vortex tank 2 for the first time. After the first wash, the exhaust gas enters the second water vortex tank 3 with the cooperation of the arc-shaped guide plate 111 and the guide pipe 9. The second nozzle 71 washes the exhaust gas in the second water vortex tank 3 for the second time. After two washes, most of the paint mist in the exhaust gas is mixed with water. Finally, the exhaust gas is discharged through the exhaust pipe 13 and enters the next treatment equipment.

[0033] By setting up a secondary washing structure, the exhaust gas entering the tower 1 is washed sequentially, which reduces the amount of paint mist entering the subsequent pipelines and exhaust gas treatment equipment, thereby reducing the maintenance frequency of the subsequent pipelines and exhaust gas treatment equipment and thus reducing maintenance costs. At the same time, both washing processes are carried out in the water vortex tank, which can minimize the washing dead corners and achieve all-round washing.

[0034] In this embodiment, a baffle plate 10 is provided between the bottom of the maintenance channel 11 and the top of the exhaust pipe 13 to prevent the washing water in the tower body 1 from being discharged with the exhaust gas.

[0035] A water collection tank 15 is provided at the bottom of the inner part of the tower body 1, and a circulating water pipe 16 is provided on the outer side of the tower body 1. One end of the circulating water pipe 16 is connected to the water collection tank 15, and the other end of the circulating water pipe 16 is connected to the main water supply pipe 4. A filter screen 151 is provided at the end of the water collection tank 15 near the circulating water pipe 16 to filter the paint residue in the water collection tank 15.

[0036] During operation, the wastewater generated from both washing processes flows into the collection tank 15. Large paint particles in the wastewater are filtered out by the filter screen 151. The filtered wastewater enters the main water supply pipe 4 through the circulating water pipe 16, forming a circulating water circuit to realize the recycling of wastewater and thus save water resources. The circulating water pump is the power source for the entire circulating water circuit.

[0037] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model; all technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of this utility model.

Claims

1. A waste gas scrubbing tower, characterized in that: The system includes a tower body (1), a first water swirl tank (2), a second water swirl tank (3), a fan (14), and a washing assembly. A maintenance passage (11) is provided above the tower body (1). The first water swirl tank (2) and the second water swirl tank (3) are both installed at the bottom of the maintenance passage (11) and are connected to the maintenance passage (11). An air inlet pipe (12) is provided on the side wall of the tower body (1), and the air inlet pipe (12) is connected to the first water swirl tank (2). The maintenance passage (11) is located above the first water swirl tank (2). An arc-shaped guide plate (111) is provided inside. A guide pipe (9) is provided between the first water swirl tank (2) and the second water swirl tank (3). The upper end of the guide pipe (9) extends into the maintenance channel (11) and cooperates with the arc-shaped guide plate (111). The lower end of the guide pipe (9) is connected to the second water swirl tank (3). An exhaust pipe (13) is provided above the maintenance channel (11). The exhaust pipe (13) is connected to the maintenance channel (11). The fan (14) is located on one side of the tower body (1). The fan (14) is connected to the exhaust pipe (13). The washing assembly includes a main water supply pipe (4), a circulation pump (5), a first branch pipe (6), and a second branch pipe (7); the main water supply pipe (4) cooperates with the circulation pump (5), the first branch pipe (6) and the second branch pipe (7) are both connected to the main water supply pipe (4), and the first branch pipe (6) is located in the first water vortex tank (2), and the second branch pipe (7) is located in the second water vortex tank (3); a first nozzle (61) is provided at the top of the first branch pipe (6), and a second nozzle (71) is provided at the top of the second branch pipe (7).

2. The waste gas scrubbing tower according to claim 1, characterized in that: The inner bottom of the tower body (1) is provided with a water collection tank (15), and the outer side of the tower body (1) is provided with a circulating water pipe (16). One end of the circulating water pipe (16) is connected to the water collection tank (15), and the other end of the circulating water pipe (16) is connected to the main water supply pipe (4).

3. The waste gas scrubbing tower according to claim 2, characterized in that: A filter screen (151) is installed at one end of the water collection tank (15) near the circulating water pipe (16).

4. The waste gas scrubbing tower according to claim 1, characterized in that: A baffle plate (10) is installed between the bottom of the maintenance passage (11) and the top of the exhaust pipe (13).

5. A waste gas scrubbing tower according to claim 1, characterized in that: Control valves (8) are provided on both the first branch pipe (6) and the second branch pipe (7).

6. The waste gas scrubbing tower according to claim 1, characterized in that: Both the first nozzle (61) and the second nozzle (71) are made of PVC.

7. A waste gas scrubbing tower according to claim 1, characterized in that: The circulating pump (5) is a vertical acid and alkali resistant pump.

8. A waste gas scrubbing tower according to claim 1, characterized in that: The tower body (1) is made of SUS304 acid and alkali resistant material.

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