Waste electrolyte evaporation drying bed tail gas absorption device

Abstract

The utility model discloses a waste electrolyte evaporation drying bed tail gas absorption device which comprises a liquid storage pool, spraying liquid is injected into the liquid storage pool, the outer wall of the liquid storage pool is provided with a waste gas inlet pipe which extends into the liquid storage pool and sinks into the spraying liquid, the waste gas inlet pipe is provided with a gas outlet branch pipe which extends out of the spraying liquid, and the gas outlet branch pipe is provided with a gas outlet pipe which extends out of the spraying liquid. A spray tower is arranged at the upper part of the liquid storage tank, a filler layer positioned right above the gas outlet branch pipe is arranged in the spray tower, a spray frame provided with a plurality of spray heads is arranged above the filler layer, and a liquid outlet pipe is arranged at the lower part of the liquid storage tank; according to the utility model, the exhaust gas inlet pipe is provided with the gas outlet branch pipe extending out of the spraying liquid, so that the exhaust gas is cooled before entering the spraying tower, the temperature of the exhaust gas is reduced, and a large amount of water mist cannot be generated during spraying adsorption.

Description

Technical Field

[0001] The utility model relates to the technical field of waste electrolyte treatment tail gas absorption, in particular to a tail gas absorption device for a waste electrolyte evaporation drying bed. Background Technique

[0002] The electrolyte of waste lithium batteries refers to the liquid inside the batteries with properties such as containing heavy metal particles, high acidity and alkalinity, and being toxic. If the electrolyte of waste lithium batteries is directly discharged into the environment, it will cause serious pollution and harm. Therefore, in the disassembly of lithium batteries, it is necessary to effectively treat the electrolyte. Currently, the treatment of waste lithium battery electrolyte usually adopts drying treatment. During the drying process of waste batteries, a large amount of high-temperature tail gas will be generated. Currently, the tail gas is usually treated by spraying and activated carbon adsorption methods. However, when the high-temperature tail gas comes into contact with the spraying liquid, a large amount of water mist will be generated, which shortens the service life of the activated carbon, the activated carbon quickly becomes saturated, and then the waste gas quickly exceeds the standard. The treatment efficiency is low and the effect is not obvious, which is not conducive to economic and environmental benefits. Content of the Utility Model

[0003] To solve the defects existing in the prior art that when the high-temperature tail gas comes into contact with the spraying liquid, a large amount of water mist will be generated, which shortens the service life of the activated carbon, the activated carbon quickly becomes saturated, and then the waste gas quickly exceeds the standard. The treatment efficiency is low and the effect is not obvious, which is not conducive to economic and environmental benefits, the utility model provides a tail gas absorption device for a waste electrolyte evaporation drying bed.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] A tail gas absorption device for a waste electrolyte evaporation drying bed of the utility model includes a liquid storage pool, in which spraying liquid is injected. An exhaust gas inlet pipe extending into the liquid storage pool and immersed in the spraying liquid is provided on the outer wall of the liquid storage pool. An air outlet branch pipe extending out of the spraying liquid is provided on the exhaust gas inlet pipe. A spraying tower is arranged above the liquid storage pool. A packing layer located directly above the air outlet branch pipe is arranged inside the spraying tower. A spraying rack equipped with a plurality of spray heads is arranged above the packing layer. A liquid outlet pipe is arranged below the liquid storage pool. The liquid outlet pipe and the spray heads are connected through a circulation pump pipeline; and a heat exchange coil is arranged at the bottom of the inner cavity of the liquid storage pool, and a cooling water inlet pipe and a cooling water outlet pipe connected to the two end parts of the heat exchange coil are arranged in the liquid storage pool. Among them, the spraying tower and the liquid storage pool are connected through a disassembly mechanism; an exhaust pipe is arranged at the top of the spraying tower.

[0006] As a preferred technical solution of the utility model, a liquid level sensor for detecting the liquid level of the spraying liquid is arranged in the liquid storage pool.

[0007] As a preferred technical solution of the utility model, the portion of the exhaust gas inlet pipe immersed in the spraying liquid and the portion of the exhaust gas branch pipe immersed in the spraying liquid are both provided with heat exchange fins.

[0008] As a preferred technical solution of the utility model, a rain cap is provided above the pipe opening of the air outlet branch pipe.

[0009] As a preferred technical solution of the utility model, the disassembly mechanism includes a first flange plate arranged at the upper port of the liquid storage tank, and a second flange plate arranged at the bottom of the spray tower and docked with the first flange plate, and the first flange plate and the second flange plate are fixed by bolts.

[0010] As a preferred technical solution of the utility model, a liquid inlet pipe and a liquid discharge pipe are provided on the liquid storage tank, and valves are provided on the liquid inlet pipe and the liquid discharge pipe.

[0011] As a preferred technical solution of the utility model, the spray tower comprises an upper tower body and a lower tower body, the upper tower body and the lower tower body are connected via a flange, and the packing layer is arranged on the lower tower body.

[0012] As a preferred technical solution of the utility model, an annular supporting block for supporting the bottom of the packing layer is provided in the middle of the lower tower body.

[0013] The beneficial effects of the utility model are:

[0014] This waste electrolyte evaporation drying bed tail gas absorption device is provided with a liquid storage tank at the bottom of the spray tower 4, and the outer wall of the liquid storage tank is provided with a waste gas inlet pipe extending into the interior of the liquid storage tank and immersed in the spray liquid, and the waste gas inlet pipe is provided with an outlet branch pipe extending from the spray liquid, so that the tail gas is cooled before entering the spray tower to reduce the temperature of the waste gas, so that a large amount of water mist will not be generated during spray adsorption, wherein a heat exchange coil is provided at the bottom of the inner cavity of the liquid storage tank, and a cooling water inlet pipe and a cooling water outlet pipe connected to the two end portions of the heat exchange coil are provided in the liquid storage tank, so that cooling water is injected into the heat exchange coil, so that the spray liquid in the liquid storage tank is cooled, so as to avoid that after the high-temperature exhaust gas is cooled, the temperature of the spray liquid rises, and there is no good cooling effect on the subsequent high-temperature exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a waste electrolyte evaporation drying bed tail gas absorption device of the utility model;

[0017] Figure 2 It is a schematic diagram of the connection structure between the liquid storage tank and the spray tower of the waste electrolyte evaporation and drying bed tail gas absorption device of the present utility model.

[0018] In the figure: 1. Liquid storage tank; 2. Exhaust gas inlet pipe; 3. Outlet branch pipe; 4. Spray tower; 5. Packing layer; 6. Spray head; 7. Spray rack; 8. Heat exchange coil; 9. Cooling water inlet pipe; 10. Cooling water outlet pipe; 11. Exhaust pipe; 12. Liquid level sensor; 13. Heat exchange fin; 14. Rain cap; 15. First flange; 16. Second flange; 17. Liquid inlet pipe; 18. Drain pipe; 19. Liquid outlet pipe; 20. Circulation pump pipeline; 21. Upper tower body; 22. Lower tower body; 23. Annular support block. Specific embodiments

[0019] The following is a description of the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model, and are not intended to limit the present utility model.

[0020] Embodiment: As Figure 1 and Figure 2As shown in the figure, a tail gas absorption device for a waste electrolyte evaporation drying bed of the present utility model includes a liquid storage tank 1, in which a spraying liquid is injected. An exhaust gas inlet pipe 2 extending into the interior of the liquid storage tank 1 and immersed in the spraying liquid is provided on the outer wall of the liquid storage tank 1. An air outlet branch pipe 3 extending out of the spraying liquid is provided on the exhaust gas inlet pipe 2. A spraying tower 4 is arranged above the liquid storage tank 1. A packing layer 5 located directly above the air outlet branch pipe 3 is arranged inside the spraying tower 4. A spraying rack 7 equipped with a plurality of spray heads 6 is arranged above the packing layer 5. A liquid outlet pipe 19 is provided at the lower part of the liquid storage tank 1. The liquid outlet pipe 19 is connected to the spray heads 6 through a circulation pump pipeline 20. And a heat exchange coil 8 is arranged at the bottom of the inner cavity of the liquid storage tank 1, and a cooling water inlet pipe 9 and a cooling water outlet pipe 10 connected to the two end parts of the heat exchange coil 8 are arranged in the liquid storage tank 1. Among them, the spraying tower 4 is connected to the liquid storage tank 1 through a disassembly mechanism. An exhaust pipe 11 is arranged at the top of the spraying tower 4. A liquid storage tank 1 is arranged at the bottom of the spraying tower 4. An exhaust gas inlet pipe 2 extending into the interior of the liquid storage tank 1 and immersed in the spraying liquid is provided on the outer wall of the liquid storage tank 1. An air outlet branch pipe 3 extending out of the spraying liquid is provided on the exhaust gas inlet pipe 2. In this way, the tail gas is cooled before entering the spraying tower to reduce the temperature of the exhaust gas. In this way, when performing spraying adsorption, a large amount of water mist will not be generated. Among them, a heat exchange coil 8 is arranged at the bottom of the inner cavity of the liquid storage tank 1, and a cooling water inlet pipe 9 and a cooling water outlet pipe 10 connected to the two end parts of the heat exchange coil 8 are arranged in the liquid storage tank 1. In this way, by injecting cooling water into the heat exchange coil, the spraying liquid in the liquid storage tank is cooled, so as to avoid the temperature of the spraying liquid rising after cooling the high-temperature exhaust gas, and having a poor cooling effect on the subsequent high-temperature exhaust gas

[0021] Among them, a liquid level sensor 12 for detecting the liquid level of the spraying liquid is arranged in the liquid storage tank 1, so that the liquid level of the spraying liquid can be detected. At the same time, a pH meter for detecting the pH value of the spraying liquid is arranged in the liquid storage tank 1, which is convenient for replacing the spraying liquid in time.

[0022] Among them, heat exchange fins 13 are arranged on the part of the exhaust gas inlet pipe 2 immersed in the spraying liquid and the part of the air outlet branch pipe 3 immersed in the spraying liquid, so as to increase the heat exchange area with the spraying liquid, thereby improving the cooling effect on the high-temperature exhaust gas.

[0023] Among them, a rain cap 14 is arranged above the nozzle of the air outlet branch pipe 3 to prevent the spraying liquid from falling into the interior of the air outlet branch pipe 3.

[0024] Among them, the disassembly mechanism includes a first flange 15 provided at the upper port of the liquid storage tank 1, and a second flange 16 provided at the bottom of the spray tower 4 and docked with the first flange 15. The first flange 15 and the second flange 16 are fixed by bolts, which facilitates the disassembly between the liquid storage tank and the spray tower 4 and is convenient for later maintenance.

[0025] Among them, a liquid inlet pipe 17 and a liquid discharge pipe 18 are provided on the liquid storage tank 1, and valves are provided on both the liquid inlet pipe 17 and the liquid discharge pipe 18, which is convenient for discharging liquid.

[0026] Among them, the spray tower 4 includes an upper tower body 21 and a lower tower body 22. The upper tower body 21 and the lower tower body 22 are connected by flanges. The packing layer 5 is arranged on the lower tower body 22. An annular supporting block 23 for supporting the bottom of the packing layer 5 is provided in the middle of the lower tower body 22, which facilitates the disassembly of the spray tower and is convenient for replacing and maintaining the internal packing layer.

[0027] During operation, in this waste electrolyte evaporation and drying bed tail gas absorption device, a liquid storage tank 1 is arranged at the bottom of the spray tower 4. An exhaust gas inlet pipe 2 extending into the interior of the liquid storage tank 1 and immersed in the spray liquid is provided on the outer wall of the liquid storage tank 1. An air outlet branch pipe 3 extending out of the spray liquid is provided on the exhaust gas inlet pipe 2, so as to cool the exhaust gas before it enters the spray tower to reduce the temperature of the exhaust gas. In this way, when performing spray adsorption, a large amount of water mist will not be generated. Among them, a heat exchange coil 8 is arranged at the bottom of the inner cavity of the liquid storage tank 1, and a cooling water inlet pipe 9 and a cooling water outlet pipe 10 connected to the two end parts of the heat exchange coil 8 are arranged in the liquid storage tank 1. By injecting cooling water into the heat exchange coil, the spray liquid in the liquid storage tank is cooled, so as to avoid the temperature of the spray liquid rising after cooling the high-temperature exhaust gas, resulting in a poor cooling effect on the subsequent high-temperature exhaust gas.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An exhaust gas absorption device for a waste electrolyte evaporation drying bed, characterized in that The invention comprises a liquid reservoir (1), wherein the liquid reservoir (1) is injected with a spraying liquid, an exhaust gas inlet pipe (2) extending into the liquid reservoir (1) and immersed in the spraying liquid is provided on the outer wall of the liquid reservoir (1), an exhaust gas inlet pipe (2) extending from the spraying liquid is provided on the exhaust gas inlet pipe (2), a gas outlet branch pipe (3) extending from the spraying liquid is provided, a spray tower (4) is provided on the upper part of the liquid reservoir (1), a packing layer (5) located directly above the gas outlet branch pipe (3) is provided inside the spray tower (4), and a plurality of spray heads (6) are installed above the packing layer (5). A spray rack (7) is provided, wherein a liquid outlet pipe (19) is provided at the bottom of the liquid reservoir (1), and the liquid outlet pipe (19) is connected to the spray head (6) via a circulating pump pipeline (20); a heat exchange coil (8) is provided at the bottom of the inner cavity of the liquid reservoir (1), and a cooling water inlet pipe (9) and a cooling water outlet pipe (10) connected to both ends of the heat exchange coil (8) are provided in the liquid reservoir (1), wherein the spray tower (4) is connected to the liquid reservoir (1) via a disassembly mechanism; and an exhaust pipe (11) is provided at the top of the spray tower (4).

2. The waste electrolyte evaporation and drying bed tail gas absorption device according to claim 1, wherein, A liquid level sensor (12) for detecting the liquid level of the spraying liquid is arranged in the liquid storage tank (1).

3. The tail gas absorption device for the waste electrolyte evaporation drying bed according to claim 1, characterized in that, The exhaust gas inlet pipe (2) is provided with heat exchange fins (13) at the portion immersed in the spraying liquid and at the portion of the exhaust gas branch pipe (3) immersed in the spraying liquid.

4. The tail gas absorption device for waste electrolyte evaporation drying bed according to claim 1, characterized in that, A rain cap (14) is provided above the pipe opening of the air outlet branch pipe (3).

5. The waste electrolyte evaporation and drying bed tail gas absorption device according to claim 1, characterized in that, The disassembly mechanism comprises a first flange (15) arranged at an upper port of the liquid storage tank (1), and a second flange (16) arranged at the bottom of the spray tower (4) and docked with the first flange (15), and the first flange (15) and the second flange (16) are fixed by bolts.

6. The waste electrolyte evaporation and drying bed tail gas absorption device according to claim 1, characterized in that, The liquid storage tank (1) is provided with a liquid inlet pipe (17) and a liquid discharge pipe (18), and both the liquid inlet pipe (17) and the liquid discharge pipe (18) are provided with valves.

7. The tail gas absorption device for the waste electrolyte evaporation drying bed according to claim 1, characterized in that, The spray tower (4) comprises an upper tower body (21) and a lower tower body (22), wherein the upper tower body (21) and the lower tower body (22) are connected via a flange, and the packing layer (5) is arranged on the lower tower body (22).

8. The tail gas absorption device for the waste electrolyte evaporation and drying bed according to claim 7, characterized in that, An annular supporting block (23) for supporting the bottom of the packing layer (5) is provided in the middle of the lower tower body (22).

Images