Diaphragm cooling and absorbing device for acid-base waste gas

Abstract

The utility model provides an acid-base waste gas diaphragm cooling absorption device, which belongs to the technical field of waste gas treatment and comprises a cooling tower main body, the cooling tower main body is formed by detachably and fixedly connecting a gas inlet section, a cooling section, a liquid inlet section and a gas outlet section from bottom to top, and a distributor assembly is arranged between the cooling section and the liquid inlet section. The distributor assembly comprises a main pipe and branch pipes, the main pipe is horizontally arranged, a plurality of flow dividing pipes are symmetrically arranged on the side wall of the main pipe, first flange pieces are fixedly connected to the ends of the flow dividing pipes, the multiple branch pipes are symmetrically distributed on the two sides of the main pipe, and second flange pieces are fixedly connected to the ends, close to the flow dividing pipes, of the branch pipes. The waste gas is cooled before being absorbed, so that the waste gas treatment effect can be effectively improved, the emission of harmful substances is reduced, water can absorb part of harmful gases in the waste gas when the waste gas is cooled, and the use of chemical reagents is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, and in particular relates to an acid and alkali waste gas diaphragm cooling and absorption device. Background Technology

[0002] In the industrial production field, some harmful waste gases are often generated during the production process. These waste gases are currently mainly purified by spray towers. The harmful components in the waste gases are absorbed by spraying with acidic solutions (such as dilute sulfuric acid) or alkaline solutions (such as sodium hydroxide solution). Spray towers can effectively remove particulate matter, acidic gases (such as SO2, HCl, HF), alkaline gases (such as NH3), or organic pollutants from the gases.

[0003] However, when the exhaust gas temperature is high (e.g., >80℃), the spray liquid is prone to evaporation, which leads to a significant decrease in absorption efficiency, consumes a large amount of chemical solution, generates a large amount of waste liquid, and produces secondary pollution from the volatilized vapor. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned in the background art of the prior art, and to propose an acid and alkali waste gas diaphragm cooling and absorption device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A membrane cooling and absorption device for acid and alkali waste gas includes a cooling tower body, which is composed of an air inlet section, a cooling section, a liquid inlet section, and an air outlet section that are detachably and fixedly connected from bottom to top. A distributor assembly is provided between the cooling section and the liquid inlet section.

[0007] The distributor assembly includes a main pipe and branch pipes. The main pipe is horizontally positioned, and multiple branch pipes are symmetrically arranged on the side wall of the main pipe. A first flange is fixedly connected to the end of each branch pipe. Multiple branch pipes are symmetrically distributed on both sides of the main pipe. A second flange is fixedly connected to the end of each branch pipe near the branch pipe. The second flange is fixedly connected to the first flange by bolts. Multiple diffuser-type conical water outlet holes are equidistantly opened on each branch pipe. Four arc-shaped grooves are opened on both the first and second flanges. The four arc-shaped grooves are circumferentially arrayed with the central axis of the first flange as the center. The arc-shaped grooves are used to adjust the water outlet angle of the diffuser-type conical water outlet holes.

[0008] Preferably, the acid and alkali waste gas diaphragm cooling and absorption device is characterized in that the central angle of the arc-shaped groove is greater than 45°, and the branch pipe can be adjusted 360°.

[0009] Preferably, the ends of the air inlet section, cooling section, liquid inlet section and air outlet section are fixed with flanges, and the air inlet section, cooling section, liquid inlet section and air outlet section are detachably and fixedly connected from bottom to top by flanges.

[0010] Preferably, the outer wall of the air intake section is connected to an air intake pipe, and the bottom of the air intake section is provided with a liquid outlet pipe.

[0011] Preferably, the outer wall of the inlet section is provided with an inlet pipe, which is detachably and fixedly connected to the main pipe.

[0012] Preferably, an air outlet pipe is provided at the upper end of the air outlet section.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. This utility model cools the waste gas before absorption treatment, which can effectively improve the waste gas treatment effect and reduce the emission of harmful substances.

[0015] 2. In the process of cooling waste gas, water can absorb some of the harmful gases in the waste gas, reducing the use of chemical reagents and lowering the cost of waste gas treatment.

[0016] 3. The water outlet angle of the diffusion-type conical water outlet of this utility model is adjustable, which can be used to meet different working conditions. Compared with the traditional cylindrical hole, the diffusion-type conical water outlet has a better liquid atomization effect, and the tap water and exhaust gas are in more complete contact, which is conducive to improving the cooling efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an acid and alkali waste gas diaphragm cooling and absorption device proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the distributor assembly structure of an acid and alkali waste gas diaphragm cooling and absorption device proposed in this utility model;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a front sectional view of an acid and alkali waste gas diaphragm cooling and absorption device proposed in this utility model.

[0021] In the diagram: 1. Cooling tower body; 2. Air inlet section; 3. Cooling section; 4. Liquid inlet section; 5. Air outlet section; 6. Distributor assembly; 7. Main pipe; 8. Branch pipe; 9. Diversion pipe; 10. First flange; 11. Second flange; 12. Diffuser-type conical water outlet; 13. Arc groove; 14. Flange; 15. Air inlet pipe; 16. Liquid outlet pipe; 17. Liquid inlet pipe; 18. Air outlet pipe. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0023] Reference Figures 1-4 A membrane cooling and absorption device for acid and alkali waste gas includes a cooling tower body 1. The cooling tower body 1 is composed of an air inlet section 2, a cooling section 3, a liquid inlet section 4, and an air outlet section 5, which are detachably and fixedly connected from bottom to top. Specifically, the ends of the air inlet section 2, the cooling section 3, the liquid inlet section 4, and the air outlet section 5 are all fixed with flanges 14. The flanges 14 have through holes. The air inlet section 2, the cooling section 3, the liquid inlet section 4, and the air outlet section 5 are detachably and fixedly connected from bottom to top through the flanges 14. In case of partial failure, only the corresponding section needs to be disassembled, avoiding overall maintenance. Spare parts management is more flexible, and key spare parts can be stored. A distributor assembly 6 is provided between the cooling section 3 and the liquid inlet section 4.

[0024] The distributor assembly 6 includes a main pipe 7 and branch pipes 8. The main pipe 7 is horizontally positioned, and its inlet is fixedly connected to the inlet pipe 17 via a right-angle bend. Multiple branch pipes 9 are symmetrically arranged on the side wall of the main pipe 7, with a first flange 10 fixedly connected to the end of each branch pipe 9. Multiple branch pipes 8 are symmetrically distributed on both sides of the main pipe 7. A second flange 11 is fixedly connected to the end of each branch pipe 8 near the branch pipe 9. The second flange 11 is detachably fixed to the first flange 10 via bolts. Multiple diffuser-type conical water outlet holes 12 are equidistantly opened on the branch pipes 8. The diffuser-type conical water outlet holes 12 provide better atomization of tap water, ensuring sufficient contact between tap water and exhaust gas. Four arc-shaped grooves 13 are opened on both the first flange 10 and the second flange 11. The four arc-shaped grooves 13 are positioned relative to the first flange 10. The central axis is arranged in a circumferential array. The arc-shaped groove 13 is used to adjust the water outlet angle of the diffuser-type conical water outlet 12. The central angle of the arc-shaped groove 13 is greater than 45°. The branch pipe 8 can be adjusted 360°. In this embodiment, the diffuser-type conical water outlet 12 on the branch pipe 8 near the right-angle bend has an angle of 45° with the horizontal plane, the diffuser-type conical water outlet 12 on the middle branch pipe 8 has an angle of 60° with the horizontal plane, and the diffuser-type conical water outlet 12 on the branch pipe 8 away from the right-angle bend has an angle of 75° with the horizontal plane. The three sets of branch pipes 8 at different angles can disperse the liquid in a wider area and avoid local overlapping coverage caused by the same angle, leaving dead corners. The water outlet angle of the diffuser-type conical water outlet 12 can be adjusted to suit different working conditions.

[0025] In practice, tap water is introduced into the top of the tower through the inlet pipe 17 and distributed through the distributor assembly 6. The water flow is sprayed upward at an inclined angle through the diffuser cone orifice 12, forming a continuous liquid film. The exhaust gas is introduced from the bottom of the tower and passes upward through the liquid film. Due to the flow of tap water, there is a large contact area and a long contact time between the gas and the tap water, which can effectively cool the exhaust gas, improve the exhaust gas treatment effect, and reduce the emission of harmful substances. When cooling the exhaust gas, some of the water-soluble exhaust gas in the exhaust gas is absorbed by the tap water, which can reduce the use of chemical reagents in the exhaust gas treatment and reduce the cost of exhaust gas treatment. After absorption treatment, the exhaust gas is discharged from the outlet pipe 18 to enter the next exhaust gas treatment process. The tap water that has absorbed heat and part of the exhaust gas is cooled by the outlet pipe 16 at the bottom of the tower and then recycled after passing through the cooling device (not shown in the figure). The cooling device adopts existing technology and will not be described in detail here.

[0026] The functional principle of this utility model can be explained through the following operation methods:

[0027] During operation, exhaust gas is introduced into the cooling tower body 1 through the inlet pipe 15, and tap water is introduced into the top of the tower through the liquid inlet pipe 17. The water is distributed through the distributor assembly 6, and the water flow is sprayed out at an upward angle from the diffuser cone-shaped water outlet 12 to form a continuous liquid film. After the exhaust gas is introduced from the bottom of the tower, it passes upward through the liquid film. The liquid film cools the exhaust gas, improves the exhaust gas treatment effect, and reduces the emission of harmful substances.

[0028] When cooling the exhaust gas, some of the water-soluble exhaust gas is absorbed by tap water, which can reduce the use of chemical reagents during exhaust gas treatment and reduce the cost of exhaust gas treatment. The cooled exhaust gas is discharged from the exhaust pipe 18 for the next exhaust gas treatment process, while the tap water that has absorbed heat and part of the exhaust gas is discharged from the bottom of the tower through the liquid outlet pipe 16 and recycled after being cooled by the cooling device.

[0029] Furthermore, in this invention, the water outlet angle of the diffuser-type conical water outlet 12 is adjustable, making it suitable for different working conditions. Compared with traditional cylindrical holes, the diffuser-type conical water outlet has a better liquid atomization effect, allowing for more thorough contact between tap water and exhaust gas, which is beneficial for improving cooling efficiency.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An acid and alkali waste gas diaphragm cooling and absorbing device, characterized in that, Including cooling tower main body (1), cooling tower main body (1) is by the inlet section (2), cooling section (3), liquid inlet section (4) and outlet section (5) from bottom to top detachable fixed connection composition, the cooling section (3) and liquid inlet section (4) between being provided with distributor assembly (6); The distributor assembly (6) includes a main pipe (7) and a branch pipe (8), the main pipe (7) is horizontally arranged, a plurality of shunt pipes (9) are symmetrically arranged on the side wall of the main pipe (7), first flange plates (10) are fixedly connected to the end portions of the shunt pipes (9), the branch pipes (8) are symmetrically distributed on both sides of the main pipe (7), second flange plates (11) are fixedly connected to the end portions of the branch pipes (8) close to the shunt pipes (9), the second flange plates (11) are detachably fixedly connected to the first flange plates (10) through bolts, diffusion type conical water outlets (12) are equidistantly arranged on the branch pipes (8), four arc-shaped grooves (13) are arranged on the first flange plates (10) and the second flange plates (11), the four arc-shaped grooves (13) are distributed in a circumferential array around the central axis of the first flange plate (10), and the arc-shaped grooves (13) are used for adjusting the water outlet angle of the diffusion type conical water outlets (12).

2. The acid and alkali waste gas diaphragm cooling and absorbing device according to claim 1, characterized in that, The central angle of the arc-shaped groove (13) is greater than 45°, and the branch pipe (8) can be adjusted by 360°.

3. The acid and alkali waste gas diaphragm cooling and absorbing device according to claim 1, characterized in that, Flanges (14) are fixed to the end portions of the inlet section (2), the cooling section (3), the liquid inlet section (4) and the outlet section (5), and the inlet section (2), the cooling section (3), the liquid inlet section (4) and the outlet section (5) are detachably fixedly connected from bottom to top through the flanges (14).

4. The acid and alkali waste gas diaphragm cooling and absorbing device according to claim 1, characterized in that, An air inlet pipe (15) is arranged in communication with the outer side wall of the inlet section (2), and a liquid outlet pipe (16) is arranged at the bottom of the inlet section (2).

5. The acid and base exhaust gas diaphragm cooling and absorbing device according to claim 1, characterized by, A liquid inlet pipe (17) is arranged on the outer side wall of the liquid inlet section (4), and the liquid inlet pipe (17) is detachably fixedly connected to the main pipe (7).

6. The acid and base exhaust gas diaphragm cooling and absorbing device according to claim 1, characterized by, An air outlet pipe (18) is arranged at the upper end of the outlet section (5).

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