Spray absorption tower for sulfur dioxide tail gas treatment

Abstract

The utility model discloses a spray absorption tower for sulfur dioxide tail gas treatment, which comprises an absorption tower main body, two first partition plates and two second partition plates are arranged in the absorption tower main body, the two first partition plates and the two second partition plates are sequentially staggered up and down, the first partition plates are arranged to incline towards the lower right corner, and the second partition plates are arranged to incline towards the lower right corner. The second partition plate inclines towards the lower left corner, a first drainage notch is formed in the lower right corner of the first partition plate, and a second drainage notch is formed in the lower left corner of the second partition plate. The first partition plate and the second partition plate which are staggered up and down are arranged in the absorption tower body, the tail gas moving path is effectively prolonged, the contact time of tail gas and spraying liquid is prolonged, meanwhile, the first spraying pipe, the second spraying pipe and the atomizing nozzles are arranged at the bottoms of the partition plates respectively, the spraying liquid is evenly sprayed after being atomized, and the spraying effect is improved. The tail gas is continuously sprayed and absorbed in the retention process, so that the absorption efficiency and the removal rate of sulfur dioxide are improved.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment technology, specifically to a spray absorption tower for treating sulfur dioxide exhaust gas. Background Technology

[0002] Spray absorption towers, as highly efficient and widely used environmental protection equipment, play a crucial role in the treatment of sulfur dioxide tail gas. The working principle of a spray absorption tower is based on the gas-liquid contact mass transfer process. When industrial waste gas containing sulfur dioxide enters the spray tower from the bottom, it comes into full contact with the liquid sprayed down from above (usually water or a specific chemical absorbent). During this contact process, the sulfur dioxide in the waste gas is transferred into the liquid through physical dissolution and chemical reactions. For acidic waste gases like sulfur dioxide, alkaline substances (such as sodium hydroxide) can be added to the spray liquid. The acidic substances in the waste gas react with the alkaline spray liquid to neutralize it, generating harmless salts, thereby achieving the purpose of removing pollutants.

[0003] The patented absorption tower for sulfur dioxide-containing tail gas, disclosed in announcement number CN219091582U, extends the movement time of the sulfur dioxide-containing tail gas inside the absorption tower body by setting a first baffle and a second baffle, thereby increasing the contact time between the absorbent liquid and the sulfur dioxide-containing tail gas and effectively improving the absorption efficiency of sulfur dioxide.

[0004] Although the first and second baffles prolong the residence time of the exhaust gas inside the absorption tower, there is a lack of effective spray coverage in these baffle areas, and the exhaust gas is not effectively absorbed by the spray during this period of residence.

[0005] Therefore, it is necessary to invent a spray absorption tower for treating sulfur dioxide tail gas to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a spray absorption tower for treating sulfur dioxide tail gas, so as to solve the problems in the above-mentioned technology.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a spray absorption tower for treating sulfur dioxide tail gas, comprising an absorption tower body, inside which are installed two No. 1 partition plates and two No. 2 partition plates, arranged alternately in a staggered manner. The No. 1 partition plate is inclined to the lower right corner, and the No. 2 partition plate is inclined to the lower left corner. A No. 1 drainage notch is provided at the lower right corner of the No. 1 partition plate, and a No. 2 drainage notch is provided at the lower left corner of the No. 2 partition plate. A No. 1 spray pipe is installed at the bottom of the No. 1 partition plate, and a No. 2 spray pipe is installed at the bottom of the No. 2 partition plate. A No. 1 atomizing nozzle is installed on the surface of the No. 1 spray pipe, and a No. 2 atomizing nozzle is installed on the surface of the No. 2 spray pipe. A liquid supply pipe is installed on the outside of the absorption tower body, and the input ends of the No. 1 and No. 2 spray pipes extend to the outside of the absorption tower body and are connected to the output end of the liquid supply pipe.

[0008] By installing staggered No. 1 and No. 2 partition plates, along with spray pipes and atomizing nozzles installed at their bottoms, multi-stage spray absorption of sulfur dioxide tail gas is achieved, improving the efficiency and effectiveness of tail gas treatment. At the same time, the inclined setting of the partition plates and the opening of drainage gaps facilitate the smooth flow and discharge of liquid.

[0009] Preferably, a gas supply pipe is installed on the outside of the absorption tower body, the gas supply pipe is located below the liquid supply pipe, and the output end of the gas supply pipe extends into the interior of the absorption tower body.

[0010] The exhaust gas containing sulfur dioxide can be introduced into the main body of the absorption tower through the gas supply pipe.

[0011] Preferably, a first valve is installed in the middle of the liquid supply pipe near its input end, and a second valve is installed in the middle of the gas supply pipe near its input end.

[0012] Valve No. 1 and Valve No. 2 were installed on the liquid supply pipe and the gas supply pipe respectively, which can conveniently control the supply of spray liquid and the introduction of exhaust gas.

[0013] Preferably, a drain pipe is installed on the outside of the main body of the absorption tower, and a No. 3 valve is installed in the middle of the drain pipe near its output end.

[0014] A drain pipe was installed on the outside of the absorption tower body, and a No. 3 valve was provided to facilitate the discharge of the treated liquid.

[0015] Preferably, the bottom surface of the absorption tower body is a slope, and the input end of the drain pipe extends into the interior of the absorption tower body and is located at the lowest point of the slope.

[0016] The bottom surface of the main body of the absorption tower is designed as a slope, and the inlet end of the drain pipe is extended to the lowest point of the slope to ensure that the treated liquid can be discharged smoothly.

[0017] Preferably, the top of the absorption tower body is provided with an exhaust port, and an exhaust assembly is installed on the top of the exhaust port.

[0018] The exhaust gas absorbed by the spray will rise and pass through the exhaust port, and finally be discharged through the exhaust assembly.

[0019] Preferably, the exhaust assembly includes an exhaust pipe, the bottom end of which is fixedly connected to the top of the absorption tower body, and a protective cover is installed at the top of the exhaust pipe.

[0020] The protective cover prevents external debris from entering the exhaust pipe, ensuring the cleanliness and unobstructed flow of the exhaust port.

[0021] Preferably, the exhaust pipe sidewall has multiple exhaust holes, which are evenly distributed.

[0022] Multiple exhaust holes are evenly distributed on the side wall of the exhaust pipe to ensure that the exhaust gas can be discharged evenly and stably.

[0023] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0024] By setting up staggered No. 1 and No. 2 partition plates inside the main body of the absorption tower, the movement path of the exhaust gas is effectively extended, and the contact time between the exhaust gas and the spray liquid is increased. At the same time, the No. 1 and No. 2 spray pipes respectively set at the bottom of the No. 1 and No. 2 partition plates, together with the atomizing nozzles on their surfaces, can atomize the spray liquid and spray it evenly into the exhaust gas. This allows the exhaust gas to be continuously sprayed and absorbed by the atomized spray liquid while it is retained by the partition plates, which greatly improves the absorption efficiency of sulfur dioxide. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a first-view structural cross-sectional view of the present invention;

[0027] Figure 3 This is a second-view structural cross-sectional view of the present invention;

[0028] Figure 4 This is a structural schematic diagram of the No. 1 partition plate, No. 1 spray pipe, and No. 1 atomizing nozzle of this utility model;

[0029] Figure 5 This is a structural schematic diagram of the No. 2 partition plate, the No. 2 spray pipe, and the No. 2 atomizing nozzle of this utility model;

[0030] Figure 6 This is a schematic diagram of the exhaust assembly of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Absorption tower body; 2. No. 1 partition plate; 3. No. 2 partition plate; 4. No. 1 spray pipe; 5. No. 2 spray pipe; 6. No. 1 atomizing nozzle; 7. No. 2 atomizing nozzle; 8. Liquid supply pipe; 9. Gas supply pipe; 10. No. 1 valve; 11. No. 2 valve; 12. Drain pipe; 13. No. 3 valve; 14. Exhaust assembly; 15. Exhaust pipe; 16. Protective cover; 17. Exhaust port. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0034] This utility model provides, for example Figure 1-6 The illustration shows a spray absorption tower for treating sulfur dioxide tail gas, comprising an absorption tower body 1. Inside the absorption tower body 1, two first partition plates 2 and two second partition plates 3 are installed, arranged alternately vertically. The first partition plates 2 are inclined to the lower right corner, and the second partition plates 3 are inclined to the lower left corner. A first drainage notch is provided at the lower right corner of the first partition plate 2, and a second drainage notch is provided at the lower left corner of the second partition plate 3. A first spray pipe 4 is installed at the bottom of the first partition plate 2, and a second spray pipe 5 is installed at the bottom of the second partition plate 3. A first atomizing nozzle 6 is installed on the surface of the first spray pipe 4, and a second atomizing nozzle 7 is installed on the surface of the second spray pipe 5. A liquid supply pipe 8 is installed on the outside of the absorption tower body 1. The input ends of the first spray pipe 4 and the second spray pipe 5 extend to the outside of the absorption tower body 1 and are connected to the output end of the liquid supply pipe 8.

[0035] In one aspect of this embodiment, an air supply pipe 9 is installed on the outside of the absorption tower body 1, the air supply pipe 9 is located below the liquid supply pipe 8, and the output end of the air supply pipe 9 extends into the interior of the absorption tower body 1. A first valve 10 is installed in the middle of the liquid supply pipe 8 near its input end, and a second valve 11 is installed in the middle of the air supply pipe 9 near its input end. A drain pipe 12 is installed on the outside of the absorption tower body 1, and a third valve 13 is installed in the middle of the drain pipe 12 near its output end. The bottom surface of the absorption tower body 1 is a slope, and the input end of the drain pipe 12 extends into the interior of the absorption tower body 1 and is located at the lowest point of the slope. An exhaust port is opened at the top of the absorption tower body 1, and an exhaust assembly 14 is installed at the top of the exhaust port. The exhaust assembly 14 includes an exhaust pipe 15, the bottom end of the exhaust pipe 15 is fixedly connected to the top of the absorption tower body 1, a protective cover 16 is installed at the top of the exhaust pipe 15, and multiple exhaust holes 17 are opened on the side wall of the exhaust pipe 15, and the multiple exhaust holes 17 are evenly distributed.

[0036] Working principle of this utility model:

[0037] Refer to the instruction manual appendix Figure 1-6 When using this utility model, first open valve 11 and introduce the tail gas containing sulfur dioxide into the body 1 of the absorption tower through the gas supply pipe 9. After the tail gas enters the tower, it will pass through the first partition plate 2 and the second partition plate 3 arranged in an alternating manner. Due to the obstruction of the first partition plate 2 and the second partition plate 3, the movement path of the tail gas in the tower is extended, which increases the contact time between the tail gas and the spray liquid.

[0038] Then, valve 10 is opened, and spray liquid is supplied to spray pipe 4 and spray pipe 5 through supply pipe 8. Spray pipe 4 and spray pipe 5 are located at the bottom of partition plate 2 and partition plate 3, respectively. The spray liquid is atomized and evenly sprayed into the exhaust gas by atomizing nozzle 6 and atomizing nozzle 7. In this way, the exhaust gas can be continuously sprayed and absorbed by the atomized spray liquid while being retained by the partition plate, which greatly improves the absorption efficiency of sulfur dioxide.

[0039] The first partition plate 2 and the second partition plate 3 are set at an angle, which can prevent the spray liquid from accumulating on the surface of the partition plate and guide the spray liquid to flow downward through the first drainage gap and the second drainage gap. At the same time, the setting of the first drainage gap and the second drainage gap allows the exhaust gas to shuttle between the first partition plate 2 and the second partition plate 3.

[0040] The exhaust gas, after being fully sprayed and absorbed, will continue to rise to the top of the absorption tower body 1 and be discharged through the exhaust assembly 14. The exhaust assembly 14 includes an exhaust pipe 15 and a protective cover 16. Multiple exhaust holes 17 are evenly opened on the side wall of the exhaust pipe 15 to ensure that the exhaust gas can be discharged evenly and stably.

[0041] When it is necessary to discharge the accumulated liquid in the main body 1 of the absorption tower, valve 13 on the drain pipe 12 can be opened, and the accumulated liquid will flow into the drain pipe 12 along the slope and be discharged.

Claims

1. A spray absorption tower for sulfur dioxide tail gas treatment, comprising an absorption tower main body (1), characterized in that: The absorption tower body (1) is internally provided with two first partition plates (2) and two second partition plates (3), the two first partition plates (2) and the two second partition plates (3) are staggered and arranged in sequence from top to bottom, the first partition plate (2) is inclinedly arranged towards the lower right corner, the second partition plate (3) is inclinedly arranged towards the lower left corner, a first drainage gap is formed at the lower right corner of the first partition plate (2), a second drainage gap is formed at the lower left corner of the second partition plate (3), a first spray pipe (4) is installed at the bottom of the first partition plate (2), a second spray pipe (5) is installed at the bottom of the second partition plate (3), a first atomizing nozzle (6) is installed on the surface of the first spray pipe (4), a second atomizing nozzle (7) is installed on the surface of the second spray pipe (5), a liquid supply pipe (8) is installed outside the absorption tower body (1), and the input ends of the first spray pipe (4) and the second spray pipe (5) extend to the outside of the absorption tower body (1) and are connected with the output end of the liquid supply pipe (8).

2. The spray absorption tower for treating sulfur dioxide tail gas according to claim 1, characterized in that: A gas supply pipe (9) is installed outside the absorption tower body (1), the gas supply pipe (9) is located below the liquid supply pipe (8), and the output end of the gas supply pipe (9) extends to the inside of the absorption tower body (1).

3. The spray absorption tower for treating sulfur dioxide tail gas according to claim 2, characterized in that: A first valve (10) is installed at the middle of the liquid supply pipe (8) and close to the input end thereof, and a second valve (11) is installed at the middle of the gas supply pipe (9) and close to the input end thereof.

4. The spray absorption tower for treating sulfur dioxide tail gas according to claim 1, characterized in that: A liquid discharge pipe (12) is installed outside the absorption tower body (1), and a third valve (13) is installed at the middle of the liquid discharge pipe (12) and close to the output end thereof.

5. The spray absorption tower for treating sulfur dioxide tail gas according to claim 4, characterized in that: The inner bottom surface of the absorption tower body (1) is a slope surface, the input end of the liquid discharge pipe (12) extends to the inside of the absorption tower body (1) and is located at the lowest position of the slope surface.

6. The spray absorption tower for treating sulfur dioxide tail gas according to claim 1, characterized in that: An exhaust port is formed at the top of the absorption tower body (1), and an exhaust assembly (14) is installed at the top of the exhaust port.

7. The spray absorption tower for treating sulfur dioxide tail gas according to claim 6, characterized in that: The exhaust assembly (14) comprises an exhaust pipe (15), the bottom end of the exhaust pipe (15) is fixedly connected with the top of the absorption tower body (1), and a protective cover (16) is installed at the top end of the exhaust pipe (15).

8. The spray absorption tower for treating sulfur dioxide tail gas according to claim 7, characterized in that: A plurality of exhaust holes (17) are formed in the side wall of the exhaust pipe (15), and the plurality of exhaust holes (17) are uniformly distributed.

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