Chemical waste gas treatment device for environmental protection

Abstract

The invention relates to the technical field of waste gas treatment equipment, and discloses an environment-friendly chemical waste gas treatment device which comprises a washing tower, at least three fan-shaped waste gas treatment chambers are arranged in the washing tower, and a waste gas guide chamber is arranged between every two adjacent waste gas treatment chambers. A gas inlet chamber, a filler chamber and a gas outlet chamber are sequentially arranged in each waste gas treatment chamber from bottom to top, a gas inlet communicated with one gas inlet chamber is formed in the washing tower, and a spraying device is arranged above each gas outlet chamber. At least three fan-shaped waste gas treatment chambers are arranged in a washing tower, a gas inlet chamber, a filler chamber and a gas outlet chamber are sequentially arranged in each waste gas treatment chamber from bottom to top, and waste gas to be treated sequentially flows through the waste gas treatment chambers and waste gas guide chambers; acid gas, alkaline gas and organic pollutants in the waste gas are sequentially removed in different waste gas treatment chambers, so that the waste gas treatment in each stage is not interfered and influenced, and the waste gas treatment effect is improved.

Description

Technical Field

[0001] This application relates to the technical field of waste gas treatment equipment, and in particular to a chemical waste gas treatment device for environmental protection. Background Art

[0002] The treatment of chemical waste gas is an important matter, and its treatment quality affects the environment. The scrubbing tower is a commonly used chemical waste gas treatment device, which converts the pollutants in the waste gas into harmless substances by means of chemical reactions or physical adsorption between the absorbent liquid (acidic, alkaline or organic solvent) and the waste gas pollutants. For example, acidic absorbent liquid is used to treat alkaline waste gas (such as NH3) in the waste gas, alkaline absorbent liquid is used to treat acidic waste gas (such as HCl, SO2) in the waste gas, and organic solvent is used to treat organic waste gas (such as benzene, toluene) in the waste gas.

[0003] However, when the existing scrubbing tower treats waste gas, the packing layers are arranged up and down. If the packing layer in the scrubbing tower only treats one type of gas, then multiple scrubbing towers need to be set up to treat acidic gas, alkaline gas or organic waste gas in the waste gas respectively, which results in a large occupied space for the whole waste gas treatment device and is difficult to be applied to small space areas. If different types of waste gas are treated simultaneously in one scrubbing tower, it will cause interference problems. Moreover, the height of the packing layer in the existing scrubbing tower is relatively low, resulting in a short contact time and insufficient contact between the waste gas and the absorbent liquid on the surface of the packing balls in the packing layer, which will also affect the waste gas treatment effect. Summary of the Invention

[0004] This application provides a chemical waste gas treatment device for environmental protection, which has the advantages of small occupied area and good waste gas treatment effect, and is used to solve the problems of large occupied space and poor waste gas treatment effect of the existing waste gas treatment equipment.

[0005] To achieve the above object, this application adopts the following technical solution: A chemical waste gas treatment device for environmental protection includes a scrubbing tower. At least three sector-shaped waste gas treatment chambers are arranged inside the scrubbing tower, and an exhaust gas diversion chamber is arranged between two adjacent waste gas treatment chambers. In each waste gas treatment chamber, an air inlet chamber, a packing chamber and an air outlet chamber are arranged in sequence from bottom to top. An air inlet is arranged on the scrubbing tower and is communicated with one of the air inlet chambers. The exhaust gas diversion chamber on one side of the air inlet chamber communicated with the air inlet is communicated with the exhaust port at the top of the scrubbing tower, and the remaining exhaust gas diversion chambers are communicated with the air inlet chambers on their adjacent sides. The exhaust gas diversion chamber is also communicated with the air outlet chambers on its adjacent other sides. Spraying devices are respectively arranged above each air outlet chamber.

[0006] Furthermore, a lower partition board and an upper partition board are fixedly installed in the inner cavity of the scrubbing tower. The lower partition board is close to the bottom of the inner cavity of the scrubbing tower, and the upper partition board is close to the top of the inner cavity of the scrubbing tower. A support column is arranged in the middle of the inner cavity of the scrubbing tower between the lower partition board and the upper partition board. At least three groups of vertical plates are arranged on the outer side of the support column. A fan-shaped exhaust gas treatment chamber located between the lower partition board and the upper partition board is formed between two adjacent groups of vertical plates, and a fan-shaped exhaust gas diversion chamber is formed between the two vertical plates in the same group. A packing support plate and a packing pressing plate are respectively arranged in the inner cavity of each exhaust gas treatment chamber in an up-and-down distribution. The packing support plate and the packing pressing plate sequentially divide the exhaust gas treatment chamber from bottom to top into an air inlet chamber, a packing chamber and an air outlet chamber.

[0007] Furthermore, an upper air guide groove located above the packing pressing plate is formed at the top of one of the vertical plates in the same group. The air outlet chamber is communicated with the exhaust gas diversion chamber through the upper air guide groove. A lower air guide groove located above the packing pressing plate is formed at the bottom of the other vertical plate in the same group. The air inlet chamber is communicated with the exhaust gas diversion chamber through the lower air guide groove.

[0008] Furthermore, a sealing plate for blocking the lower air guide groove is arranged on one side of the inner part of the air inlet chamber communicated with the air inlet.

[0009] Furthermore, an air vent groove is formed in the upper partition board. The air vent groove is communicated with the exhaust gas diversion chamber on the side of the sealing plate away from the air inlet chamber.

[0010] Furthermore, a diversion frame located at the outer edge of the lower air guide groove is fixedly installed on the vertical plate.

[0011] Furthermore, an isolation plate with the same number as the air inlet chambers is arranged between the lower partition board and the bottom of the inner cavity of the scrubbing tower. The inner side of the isolation plate is hermetically connected with the outer side of the support column. The isolation plate divides the space between the lower partition board and the bottom of the inner cavity of the scrubbing tower into water storage chambers with the same number as the air inlet chambers. A baffle located below the lower air guide groove is fixedly installed in the exhaust gas diversion chamber. A water guide groove located directly below the lower air guide groove is further formed at the bottom of the other vertical plate in the same group. The water guide groove is located below the baffle. An overflow pipe is fixedly sleeved on the lower partition board directly below the baffle. The top end of the overflow pipe is located above the water guide groove, and a gap for the absorption liquid to flow through is reserved between the top end of the overflow pipe and the bottom of the baffle. The bottom end of the overflow pipe extends into the water storage chamber below the lower partition board.

[0012] Further, the spraying device includes a main liquid delivery pipe located above the upper partition plate. One end of the main liquid delivery pipe extends outside the scrubbing tower, and a number of arc-shaped branch pipes are connected to the main liquid delivery pipe. The number of arc-shaped branch pipes is not less than two. The bottom of each arc-shaped branch pipe is respectively connected to a longitudinal branch pipe. The bottom end of each longitudinal branch pipe extends into the air outlet chamber and is fixedly installed with a nozzle. Sealing rings are respectively arranged at the connection parts between the longitudinal branch pipes and the upper partition plate and between the main liquid delivery pipe and the scrubbing tower for sealing.

[0013] Further, water tanks with the same number and one-to-one correspondence as the number of water storage chambers are arranged outside the scrubbing tower. A water pump is arranged on the water tank. The water outlet of the water pump is communicated with the main liquid delivery pipe through a first pipeline. The water storage chamber, the air inlet chamber and the water inlet of the water tank are respectively connected through a second pipeline.

[0014] Further, a discharge port and a feeding port communicated with the packing chamber are also arranged outside the scrubbing tower. The discharge port is located at the bottom of the packing chamber, and the feeding port is located at the top of the packing chamber. Sealing covers are arranged outside both the discharge port and the feeding port.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. An environmental protection chemical waste gas treatment device provided by the present application, by arranging at least three fan-shaped waste gas treatment chambers in the scrubbing tower, and an air inlet chamber, a packing chamber and an air outlet chamber are sequentially arranged from bottom to top in each waste gas treatment chamber. At the same time, a waste gas diversion chamber is arranged between two adjacent waste gas treatment chambers. The waste gas to be treated flows through the waste gas treatment chamber and the waste gas diversion chamber in sequence, so as to remove acidic gas, alkaline gas and organic pollutants in the waste gas in different waste gas treatment chambers in sequence, so that the waste gas treatment in each stage does not interfere with each other, thereby improving the waste gas treatment effect.

[0017] 2. By setting the waste gas treatment chamber in the scrubbing tower as fan-shaped, compared with the existing waste gas treatment device, in a limited space, the height of the packing chamber is higher, that is, the contact path between the waste gas and the absorption liquid on the surface of the packing balls in the packing chamber is longer, which is beneficial to the full contact between the waste gas and the absorption liquid, further improving the waste gas treatment effect, and avoiding the problem that the waste gas flows to the nozzle and affects the nozzle, and improving the service life of the nozzle. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative efforts:

[0019] Figure 1Schematic structural diagram of the present invention;

[0020] Figure 2 is Figure 1 Internal structural diagram of the scrubbing tower in

[0021] Figure 3 is Figure 2 Partial enlarged structural diagram at location A in

[0022] Figure 4 is Figure 2 Structural diagram of the spraying device in

[0023] Figure 5 is Figure 2 Structural diagram of the vertical plate in

[0024] Figure 6 is Figure 1 Top view sectional structural diagram at a-a in

[0025] Figure 7 For comparison Figure 6 Structural diagram when the exhaust gas treatment chamber in

[0026] In the figure: 1, scrubbing tower; 101, intake chamber; 102, packing chamber; 103, outlet chamber; 104, exhaust gas diversion chamber; 105, water storage chamber; 2, lower partition board; 3, upper partition board; 301, ventilation slot; 4, support column; 5, vertical plate; 501, upper air guiding slot; 502, lower air guiding slot; 503, water guiding slot; 6, packing support plate; 7, packing pressing plate; 8, intake port; 9, sealing plate; 10, discharge port; 11, feeding port; 12, spraying device; 121, liquid delivery main pipe; 122, arc-shaped branch pipe; 123, longitudinal branch pipe; 124, nozzle; 13, diversion frame; 14, isolation board; 15, baffle; 16, overflow pipe; 17, water tank. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] Example 1, as Figure 1 - Figure 3, an environmental protection chemical waste gas treatment device, including a scrubbing tower 1. Inside the scrubbing tower 1, a lower partition plate 2 and an upper partition plate 3 are fixedly installed. The lower partition plate 2 is close to the bottom of the inner cavity of the scrubbing tower 1, and the upper partition plate 3 is close to the top of the inner cavity of the scrubbing tower 1. In the middle of the inner cavity of the scrubbing tower 1, there are support columns 4 located between the lower partition plate 2 and the upper partition plate 3. Outside the support columns 4, there are several groups of vertical plates 5. The number of groups of vertical plates 5 is not less than three. Between adjacent two groups of vertical plates 5, there are formed fan-shaped waste gas treatment chambers located between the lower partition plate 2 and the upper partition plate 3. The number of vertical plates 5 in one group is two. Between the two vertical plates 5 in the same group, there is formed a fan-shaped waste gas diversion chamber 104.

[0029] Inside the inner cavity of each waste gas treatment chamber, there are respectively a packing support plate 6 and a packing pressing plate 7 distributed vertically. The packing support plate 6 and the packing pressing plate 7 divide the waste gas treatment chamber into an air inlet chamber 101, a packing chamber 102, and an air outlet chamber 103 in sequence from bottom to top. When in use, the packing chamber 102 is filled with packing balls. At the top of one of the vertical plates 5 in the same group, there is an upper air guiding groove 501 located above the packing pressing plate 7. At the bottom of the other vertical plate 5 in the same group, there is a lower air guiding groove 502 located above the packing pressing plate 7. On the scrubbing tower 1, there is fixedly installed an air inlet 8 communicating with one of the air inlet chambers 101. And on one side inside the air inlet chamber 101 communicating with the air inlet 8, there is a sealing plate 9 that blocks the lower air guiding groove 502 ( Figure 3 In order to facilitate the labeling of the lower air guiding groove 502, only a part of the sealing plate 9 is drawn. In the complete state, the sealing plate 9 will completely block the lower air guiding groove 502). The waste gas to be treated enters one of the air inlet chambers 101 through the air inlet 8. The waste gas flows upward in this air inlet chamber 101 through the packing chamber 102 and the air outlet chamber 103 in sequence, and flows into the waste gas diversion chamber 104 adjacent to this fan-shaped treatment chamber from the upper air guiding groove 501 on the other side of the air outlet chamber 103. The waste gas flows downward from this waste gas diversion chamber 104 and flows into the next air inlet chamber 101 from the lower air guiding groove 502 at the bottom, then flows upward in the next air inlet chamber 101 and flows to a waste gas diversion chamber 104 until the waste gas flows to the last air inlet chamber 101 in sequence.

[0030] Please refer to Figure 2 - Figure 4 , on the upper partition plate 3, there is an air vent groove 301. The air vent groove 301 communicates with the waste gas diversion chamber 104 on the side of the sealing plate 9 away from the air inlet chamber 101. So that after the treated waste gas flows upward from the last air inlet chamber 101 through the upper air guiding groove 501 on one side of the top of the air outlet chamber 103, it directly flows upward through the air vent groove 301 and is discharged through the exhaust port at the top of the scrubbing tower 1.

[0031] An outlet 10 and a feeding port 11 communicating with the packing chamber 102 are also provided on the outer side of the scrubbing tower 1. The outlet 10 is located at the bottom of the packing chamber 102, and the feeding port 11 is located at the top of the packing chamber 102. Removable sealing covers are provided outside both the outlet 10 and the feeding port 11. The packing balls are conveyed into the packing chamber 102 through the feeding port 11, and the packing balls in the packing chamber 102 can be taken out through the outlet 10, which facilitates the replacement of the packing in the packing chamber 102.

[0032] Spraying devices 12 with the same number as the waste gas treatment chambers are fixedly installed on the upper partition plate 3. The spraying device 12 includes a liquid conveying main pipe 121. One end of the liquid conveying main pipe 121 extends outside the scrubbing tower 1. A number of arc-shaped branch pipes 122 are connected to the liquid conveying main pipe 121. The number of the arc-shaped branch pipes 122 is not less than two. The bottom of each arc-shaped branch pipe 122 is respectively connected with a longitudinal branch pipe 123. The bottom end of each longitudinal branch pipe 123 respectively extends into the air outlet chamber 103 and is fixedly installed with a nozzle 124, and the nozzle 124 is located above the upper air guiding groove 501. The connection part of the longitudinal branch pipe 123 and the upper partition plate 3 is sealed by a sealing ring to prevent waste gas leakage. The absorption liquid enters from one end of the spraying device 12 and evenly flows into each arc-shaped branch pipe 122, longitudinal branch pipe 123 and nozzle 124, so that the nozzle 124 sprays downward and acts on the packing balls in the packing chamber 102. The porous structure of the packing balls greatly increases the surface area of gas-liquid contact, making it easier for pollutants to be absorbed or reacted.

[0033] Please refer to Figure 2 - Figure 5 , a diversion frame 13 located at the outer edge of the lower air guiding groove 502 is fixedly installed on the vertical plate 5. Through the blocking action of the diversion frame 13, the absorption liquid flowing downward after spraying is prevented from falling into the waste gas diversion chamber 104 through the lower air guiding groove 502.

[0034] There are isolation plates 14 with the same number as the intake chambers 101 between the lower partition plate 2 and the bottom of the inner cavity of the scrubbing tower 1. The inner side of the isolation plate 14 is hermetically connected to the outer side of the support column 4. The isolation plate 14 divides the space between the lower partition plate 2 and the bottom of the inner cavity of the scrubbing tower 1 into water storage chambers 105 with the same number as the intake chambers 101. A baffle 15 located below the lower air guiding groove 502 is fixedly installed in the exhaust gas diversion chamber 104. A water guiding groove 503 located directly below the lower air guiding groove 502 is also provided at the bottom of the other vertical plate 5 in the same group. The water guiding groove 503 is located below the baffle 15. An overflow pipe 16 located directly below the baffle 15 is fixedly sleeved on the lower partition plate 2. The top end of the overflow pipe 16 is located above the water guiding groove 503, and a gap for the absorption liquid to flow through is reserved between the top end of the overflow pipe 16 and the bottom of the baffle 15. The bottom end of the overflow pipe 16 extends into the water storage chamber 105 below the lower partition plate 2. During actual use, due to the overflow effect, the absorption liquid in the intake chamber 101 can flow into the water storage chamber 105 through the overflow pipe 16 for recycling, and at the same time, the liquid level in the intake chamber 101 always submerges the water guiding groove 503, preventing the problem that during the waste gas treatment process, the amount of absorption liquid flowing into the intake chamber 101 decreases, causing the liquid discharge channel to open and the waste gas to escape through the absorption liquid discharge channel.

[0035] Please refer to Figure 1 - Figure 6 , there are water tanks 17 on the outer side of the scrubbing tower 1 that are in one-to-one correspondence with the water storage chambers 105 and have the same number. A water pump is provided on the water tank 17. The water outlet of the water pump is connected to the liquid delivery main pipe 121 through a first pipeline. The absorption liquid in the water storage chamber 105 is pumped into the liquid delivery main pipe 121 by the water pump for recycling. The water storage chamber 105, the intake chamber 101 and the water inlet of the water tank 17 are respectively connected through a second pipeline, and valves (not shown in the figure) are respectively provided on the second pipeline. When treating waste gas, the valve on the second pipeline connecting the intake chamber 101 and the water tank 17 is closed. After the waste gas treatment is completed, by opening the valve on the second pipeline connecting the intake chamber 101 and the water tank 17, the absorption liquid in the intake chamber 101 can be completely discharged.

[0036] In use, different absorbents for pollutants in the waste gas are respectively added into the water tank 17, and the valve on the second channel between the water storage chamber 105 and the water tank 17 is opened, so that the absorbent is also added into the water storage chamber 105. For example, when the number of waste gas treatment chambers is three, an alkaline absorbent, an acidic absorbent, and an oxidant or organic solvent for treating organic pollutants can be respectively added into the three water tanks 17. Then, the water pump on the water tank 17 is started to pump the absorbent into the liquid delivery main pipe 121. The absorbent flows through the arc-shaped branch pipe 122 and the longitudinal branch pipe 123 to the nozzle 124, and sprays downward from the nozzle 124, so that the absorbent evenly flows through the packing balls in the packing chamber 102. Then, the waste gas is introduced into one of the intake chambers 101 from the air inlet 8. The waste gas first flows through the packing chamber 102 in the first waste gas treatment chamber, and fully contacts the alkaline solution on the surface of the packing balls in the packing chamber 102 to treat the acidic gas in the waste gas. After the waste gas flows into the air outlet chamber 103, it flows to the first waste gas diversion chamber 104 through the upper air guiding groove 501 on one side, and flows downward in the first waste gas diversion chamber 104, and then flows to the intake chamber 101 in the second waste gas treatment chamber through a lower air guiding groove 502 below, and flows upward through the second packing chamber 102, and fully contacts the acidic solution on the surface of the packing balls in the packing chamber 102 to treat the alkaline gas in the waste gas. Then, the waste gas flows to the second waste gas diversion chamber 104 through the lower air guiding groove 502 on one side of the second air outlet chamber 103, and flows downward in the second waste gas diversion chamber 104, and then flows to the intake chamber 101 in the last waste gas treatment chamber through a lower air guiding groove 502 below, and flows upward through the last air outlet chamber 103, and fully contacts the oxidant or organic solvent on the surface of the packing balls in the air outlet chamber 103 to remove the organic pollutants in the waste gas. The treated waste gas flows to the last waste gas diversion chamber 104 through the lower air guiding groove 502 on one side of the air outlet chamber 103, and then flows upward out through the ventilation groove 301 above the last waste gas diversion chamber 104.

[0037] When the waste gas to be treated also includes cyanide-containing waste gas, chlorine-containing waste gas or nitrogen oxide-containing waste gas, such as Figure 7 as described, the number of the vertical plates 5 can be set to four groups or more. By reducing the area of the fan-shaped waste gas treatment chamber and increasing the number of waste gas treatment chambers, the cyanide-containing waste gas, chlorine-containing waste gas or nitrogen oxide-containing waste gas in the waste gas can also be treated simultaneously.

[0038] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A chemical waste gas treatment device for environmental protection, including a scrubbing tower, characterized in that, The interior of the scrubbing tower is provided with at least three sector-shaped waste gas treatment chambers, and there is a waste gas diversion chamber between two adjacent waste gas treatment chambers. In each waste gas treatment chamber, an intake chamber, a packing chamber, and an outlet chamber are successively arranged from bottom to top. The scrubbing tower is provided with an intake port communicating with one of the intake chambers. One side waste gas diversion chamber of the intake chamber communicating with the intake port is communicated with the exhaust port at the top of the scrubbing tower, and the remaining waste gas diversion chambers are communicated with the intake chambers on their adjacent sides. The waste gas diversion chamber is also communicated with the outlet chamber on its adjacent other side. A spraying device is respectively arranged above each outlet chamber.

2. The chemical waste gas treatment device for environmental protection according to claim 1, characterized in that, A lower partition board and an upper partition board are fixedly installed in the inner cavity of the scrubbing tower. The lower partition board is close to the bottom of the inner cavity of the scrubbing tower, and the upper partition board is close to the top of the inner cavity of the scrubbing tower. A support column located between the lower partition board and the upper partition board is arranged in the middle of the inner cavity of the scrubbing tower. At least three groups of vertical plates are arranged on the outer side of the support column. A sector-shaped waste gas treatment chamber located between the lower partition board and the upper partition board is formed between two adjacent groups of vertical plates, and a sector-shaped waste gas diversion chamber is formed between the two vertical plates in the same group. A packing support plate and a packing pressing plate are respectively arranged in the inner cavity of each waste gas treatment chamber in an up-and-down distribution. The packing support plate and the packing pressing plate divide the waste gas treatment chamber into an intake chamber, a packing chamber, and an outlet chamber successively from bottom to top.

3. The chemical waste gas treatment device for environmental protection according to claim 2, characterized in that, An upper air guiding groove located above the packing pressing plate is opened at the top of one of the vertical plates in the same group. The outlet chamber is communicated with the waste gas diversion chamber through the upper air guiding groove. A lower air guiding groove located above the packing pressing plate is opened at the bottom of the other vertical plate in the same group. The intake chamber is communicated with the waste gas diversion chamber through the lower air guiding groove.

4. The chemical waste gas treatment device for environmental protection according to claim 3, characterized in that, A sealing plate for blocking the lower air guiding groove is arranged on the inner side of the intake chamber communicated with the intake port.

5. The chemical waste gas treatment device for environmental protection according to claim 4, characterized in that, An air vent groove is opened on the upper partition board. The air vent groove is communicated with the waste gas diversion chamber on the side of the sealing plate away from the intake chamber.

6. The chemical waste gas treatment device for environmental protection according to claim 3, wherein A diversion frame located at the outer edge of the lower air guiding groove is fixedly installed on the vertical plate.

7. The chemical waste gas treatment device for environmental protection according to claim 3, wherein A plurality of isolation plates equal in number to the intake chambers are arranged between the lower partition board and the bottom of the inner cavity of the scrubbing tower. The inner side of the isolation plate is hermetically connected with the outer side of the support column. The isolation plate divides the space between the lower partition board and the bottom of the inner cavity of the scrubbing tower into a plurality of water storage chambers equal in number to the intake chambers. A baffle located below the lower air guiding groove is fixedly installed in the waste gas diversion chamber. A water guiding groove located directly below the lower air guiding groove is also opened at the bottom of the other vertical plate in the same group. The water guiding groove is located below the baffle. An overflow pipe located directly below the baffle is fixedly sleeved on the lower partition board. The top end of the overflow pipe is located above the water guiding groove, and a gap for the absorption liquid to flow through is reserved between the top end of the overflow pipe and the bottom of the baffle. The bottom end of the overflow pipe extends into the water storage chamber below the lower partition board.

8. The chemical waste gas treatment device for environmental protection according to claim 1, characterized in that, The described spraying device includes a main liquid delivery pipe located above the upper partition plate. One end of the main liquid delivery pipe extends outside the scrubbing tower, and a number of arc-shaped branch pipes are connected to the main liquid delivery pipe. The number of arc-shaped branch pipes is not less than two. The bottom of each arc-shaped branch pipe is respectively connected to a longitudinal branch pipe. The bottom end of each longitudinal branch pipe extends into the air outlet chamber and is fixedly installed with a nozzle. Sealing rings are respectively arranged at the connection parts between the longitudinal branch pipes and the upper partition plate and between the main liquid delivery pipe and the scrubbing tower for sealing.

9. The chemical waste gas treatment device for environmental protection according to claim 8, characterized in that, Outside the scrubbing tower, there are water tanks that are the same in number as and correspond one-to-one with the water storage chambers. A water pump is provided on the water tank. The water outlet of the water pump is connected to the main liquid delivery pipe through a first pipeline. The water storage chamber, the air inlet chamber and the water inlet of the water tank are respectively connected through a second pipeline.

10. The chemical waste gas treatment device for environmental protection according to claim 1, characterized in that, Outside the scrubbing tower, there are also a discharge port and a feeding port that communicate with the packing chamber. The discharge port is located at the bottom of the packing chamber, and the feeding port is located at the top of the packing chamber. Sealing covers are provided outside both the discharge port and the feeding port.

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