Acid mist purification device for electrolytic copper foil waste gas treatment

Abstract

The utility model discloses an acid mist purification device for electrolytic copper foil waste gas treatment, which comprises a washing tower, a liquid storage tank and a controller, the washing tower is connected with a gas inlet pipeline and a gas outlet pipeline, a filler layer and a spraying mechanism are arranged in the washing tower, the spraying mechanism is connected with the liquid storage tank through a water distribution pipeline, and the controller is connected with the liquid storage tank. The spraying mechanism comprises a lower first spraying mechanism and an upper second spraying mechanism, and packing layers are respectively arranged below the two spraying mechanisms; and a demister is also arranged in the washing tower and is arranged at the top in the washing tower. The demister is arranged at the top in the washing tower, so that liquid medicine fog drops carried in gas can be collected, the treated clean air is discharged from the discharge pipeline, the liquid medicine fog drops are prevented from being discharged to the outside together, and the air purification effect is improved; the nozzle density and the spraying pressure of the second spraying mechanism are greater than those of the first spraying mechanism, so that the atomization effect on the residual acid gas can be improved, and the concentration range of the absorbed acid gas is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment equipment, in particular to an acid mist purification device for treating waste gas from electrolytic copper foil. Background Art

[0002] With the development of my country's economy, my country's industrial development has also achieved great development, but industrial production is also accompanied by environmental problems. For example, in the industrial production of electrolytic copper foil, when sulfuric acid and copper dissolve, a large amount of acid mist gas will be generated in the copper dissolving tank, solution tank, electrolytic cell, surface treatment machine and other equipment. If the acid mist gas is directly discharged into the air, it will cause air pollution and water pollution, bring pollution to the ecological environment, and thus affect human health. For this reason, it is necessary to add an acid mist treatment device to the production equipment to treat the acid mist, but the traditional acid mist treatment device is simple, such as the patent CN218011943U discloses an acid mist purification tower for waste gas treatment, which is mainly sprayed by a spray head, a No. 1 packing layer, a No. 2 packing layer, a No. 1 through pipe, a No. 2 through pipe, a ring pipe and a spray head in the interior of the purification tower body, and the waste gas inside the purification tower body is treated again to achieve the effect of multiple filtration treatment and circulating drainage, and the treatment effect is not ideal. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an acid mist purification device for treating electrolytic copper foil waste gas with more reasonable structural design, better purification treatment effect, higher efficiency and longer service life in view of the shortcomings of the prior art.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: an acid mist purification device for electrolytic copper foil waste gas treatment, comprising a washing tower, a liquid storage tank and a controller, the washing tower is connected with an air intake pipe and an exhaust pipe, the air intake pipe is arranged at the lower part of the washing tower, and the exhaust pipe is arranged at the upper part of the washing tower; a packing layer and a spray mechanism are arranged in the washing tower, the spray mechanism is connected to the liquid storage tank through a water distribution pipe, the spray mechanism comprises a first spray mechanism below and a second spray mechanism above, and packing layers are arranged under the two spray mechanisms respectively, characterized in that: a demister (plate-type water collecting demister, or wire mesh demister layer) is also arranged in the washing tower, the demister is arranged at the top of the washing tower, and the exhaust pipe is connected to the inside of the washing tower through the demister; the nozzle density on the second spray mechanism is greater than the nozzle density of the first spray mechanism, and the nozzle injection pressure of the second spray mechanism is greater than the nozzle injection pressure of the first spray mechanism.

[0005] Furthermore, an acid mist separator is provided on the air inlet pipe, a filter screen is provided in the acid mist separator, and the air inlet pipe is connected to the washing tower through the acid mist separator; the acid mist separator is provided with a liquid outlet pipe, and a liquid outlet valve is provided on the liquid outlet pipe.

[0006] Furthermore, the air inlet pipe is connected to the washing tower from the bottom side of the washing tower, and the exhaust pipe is arranged at the top of the washing tower.

[0007] Furthermore, the bottom of the washing tower is an air bin, and a support plate is respectively arranged above the air bin and above the first spray mechanism, the packing layer below the first spray mechanism is arranged on the lower support plate, and the packing layer below the second spray mechanism is arranged on the upper support plate; the first spray mechanism is installed on the bottom surface of the upper support plate.

[0008] Furthermore, the filler layer is composed of a plurality of PP floating ball fillers, and each filler layer has three layers of fillers evenly arranged.

[0009] Furthermore, the liquid storage tank is connected to the water distribution pipe through two pipes, a circulation pump is provided on one pipe, and a backup pump is provided on the other pipe. Valves are provided on the two pipes between the circulation pump and the liquid storage tank and between the backup pump and the liquid storage tank, and the two valves are respectively connected to the controller.

[0010] Furthermore, an electric butterfly valve is provided on the liquid inlet pipe of the liquid storage tank, and the electric butterfly valve is connected to the controller.

[0011] Furthermore, the liquid storage tank is connected with a water supply pipe, a liquid discharge pipe and an overflow pipe, the water supply pipe includes an automatic water supply pipe and a manual water supply pipe, and the overflow pipe is connected to the liquid discharge pipe.

[0012] Furthermore, a filter plate is arranged in the liquid storage tank, a pH detector is arranged on the liquid storage tank, and the pH detector extends into the liquid in the liquid storage tank.

[0013] Furthermore, an observation window is provided on the side wall of the washing tower to facilitate observation of the operating status inside the washing tower.

[0014] The utility model can collect the liquid medicine droplets entrained in the gas by arranging a demister at the top of the washing tower, so that the treated clean air can be discharged from the discharge pipe, and the liquid medicine droplets can be prevented from being discharged to the outside together, thereby improving the air purification effect; and the nozzle density and injection pressure of the second spray mechanism are greater than those of the first spray mechanism, which can improve the atomization effect of the remaining acid gas and expand the range of the absorbed acid gas concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0017] In the figure, 1 is a washing tower, 11 is an air bin, 12 is a support plate, 13 is a packing layer, 14 is a first spray mechanism, 15 is a second spray mechanism, 16 is a demister, 17 is an observation window, 2 is an air inlet pipe, 21 is an acid mist separator, 22 is a filter screen, 23 is a liquid outlet pipe, 3 is a liquid storage tank, 31 is a pH detector, 4 is a water distribution pipe, 41 is a circulation pump, 42 is a standby pump, 51 is an automatic water supply pipe, 52 is a manual water supply pipe, 6 is a liquid inlet pipe, 61 is an electric butterfly valve, 7 is a discharge pipe, 71 is an overflow pipe, 8 is a controller, and 9 is an exhaust pipe. DETAILED DESCRIPTION

[0018] In this embodiment, refer to Figure 1-Figure 2 The acid mist purification device for treating waste gas from electrolytic copper foil comprises a washing tower 1, a liquid storage tank 3 and a controller 8. The washing tower 1 is connected with an air intake pipe 2 and an exhaust pipe 9. The air intake pipe 2 is arranged at the lower part of the washing tower 1, and the exhaust pipe 9 is arranged at the upper part of the washing tower 1, and an exhaust mode from bottom to top is adopted; a packing layer 13 and a spray mechanism are arranged in the washing tower 1, and the spray mechanism is connected to the liquid storage tank 3 through a water distribution pipe 4. The spray mechanism comprises a first spray mechanism 14 at the bottom and a second spray mechanism 15 at the top, and a packing layer 13 is arranged under the two spray mechanisms respectively; a demister 16 (a plate-type water collecting demister or a wire mesh demister layer) is also arranged in the washing tower 1, and the demister 16 is arranged at the top of the washing tower 1, and the exhaust pipe 9 is connected to the inside of the washing tower 1 through the demister 16; the nozzle density on the second spray mechanism 15 is greater than the nozzle density of the first spray mechanism 14, and the nozzle injection pressure of the second spray mechanism 15 is greater than the nozzle injection pressure of the first spray mechanism 14.

[0019] An acid mist separator 21 is provided on the air inlet pipe 2, and a filter screen 22 is provided in the acid mist separator 21. The air inlet pipe 2 is connected to the washing tower 1 through the acid mist separator 21 to filter out larger impurities; the acid mist separator 21 is provided with a liquid outlet pipe 23, and a liquid outlet valve is provided on the liquid outlet pipe 23.

[0020] The air inlet pipe 2 is connected to the washing tower 1 from the bottom side of the washing tower 1 , and the exhaust pipe 9 is arranged at the top of the washing tower 1 .

[0021] The bottom of the washing tower 1 is an air bin 11, and a support plate 12 is respectively arranged above the air bin 11 and above the first spray mechanism 14. The packing layer 13 below the first spray mechanism 14 is arranged on the lower support plate 12, and the packing layer 13 below the second spray mechanism 15 is arranged on the upper support plate 12; the first spray mechanism 14 is installed on the bottom surface of the upper support plate 12.

[0022] The packing layer 13 is composed of a plurality of floating ball fillers made of PP material, and each packing layer 13 has three layers of fillers evenly arranged.

[0023] The liquid storage tank 3 is connected to the water distribution pipe 4 through two pipes, one pipe is provided with a circulation pump 41, and the other pipe is provided with a backup pump 42. Valves are provided on the two pipes between the circulation pump 41 and the liquid storage tank 3 and between the backup pump 42 and the liquid storage tank 3, and the two valves are respectively connected to the controller 8.

[0024] An electric butterfly valve 61 is provided on the liquid inlet pipe 6 of the liquid storage tank 3 , and the electric butterfly valve 61 is connected to the controller 8 .

[0025] The liquid storage tank 3 is connected to a water supply pipe, a liquid discharge pipe 7 and an overflow pipe 71 . The water supply pipe includes an automatic water supply pipe 51 and a manual water supply pipe 52 . The overflow pipe 71 is connected to the liquid discharge pipe 7 .

[0026] A filter plate is provided in the liquid storage tank 3, and a pH detector 31 is provided on the liquid storage tank 3. The pH detector 31 extends into the liquid in the liquid storage tank. Condensate is provided inside the liquid storage tank 3, and the condensate is a sodium hydroxide solution with a concentration of 5%. The pH detector detects the pH value of the liquid in real time and cooperates with the electric butterfly valve 61. When the pH value of the sodium hydroxide solution is less than 8, the electric butterfly valve 61 is triggered to open, and the sodium hydroxide solution is added to the liquid storage tank 3 until the pH value is greater than 8.

[0027] An observation window 17 is provided on the side wall of the washing tower 1 to facilitate observation of the operating status inside the washing tower 1 .

[0028] Working principle: the waste gas generated during the production process is collected by the gas collecting hood installed on the production equipment and input into the washing tower 1 from the bottom through the air inlet pipe 2. Under the wind pressure of the fan, the waste gas quickly fills the air chamber 11, and then rises evenly through the packing layer 13 below. On the surface of the packing, the acidic substances in the gas phase react chemically with the alkaline substances in the liquid phase, and the soluble salts generated by the reaction flow into the liquid storage tank 3 below with the absorption liquid. The acidic gas that has not been completely absorbed continues to rise and enters the first atomization section for spraying and atomization by the first spray mechanism 14. The liquid medicine is sprayed out at high speed from the uniformly distributed nozzles of the first spray mechanism 14, forming countless fine droplets that fully merge with the gas and continue to react chemically in contact. Then the acidic gas rises to the second atomization section and is sprayed and atomized by the second spray mechanism 15. Finally, the liquid medicine droplets entrained in the gas are collected by the demister 16, and the treated clean air is discharged from the discharge pipe 9.

[0029] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. An acid mist purification device for treating waste gas from electrolytic copper foil, comprising a washing tower, a liquid storage tank and a controller, wherein the washing tower is connected with an air intake pipe and an exhaust pipe, wherein the air intake pipe is arranged at the lower part of the washing tower, and the exhaust pipe is arranged at the upper part of the washing tower; a packing layer and a spray mechanism are arranged in the washing tower, wherein the spray mechanism is connected to the liquid storage tank through a water distribution pipe, wherein the spray mechanism comprises a first spray mechanism at the lower part and a second spray mechanism at the upper part, wherein packing layers are arranged at the lower part of the two spray mechanisms, and wherein: A demister is also provided in the washing tower, and the demister is arranged at the top of the washing tower, and the exhaust pipe is connected to the inside of the washing tower through the demister; the nozzle density on the second spray mechanism is greater than the nozzle density of the first spray mechanism, and the nozzle injection pressure of the second spray mechanism is greater than the nozzle injection pressure of the first spray mechanism; An acid mist separator is arranged on the air inlet pipeline, a filter screen is arranged in the acid mist separator, and the air inlet pipeline is connected to the washing tower through the acid mist separator; the acid mist separator is arranged with a liquid outlet pipe, and a liquid outlet valve is arranged on the liquid outlet pipe.

2. The acid mist purification device for treating waste gas from electrolytic copper foil according to claim 1, characterized in that: The air inlet pipe is connected to the washing tower from the bottom side of the washing tower, and the exhaust pipe is arranged at the top of the washing tower.

3. The acid mist purification device for treating electrolytic copper foil waste gas according to claim 2, characterized in that: The bottom of the washing tower is an air bin, and a support plate is respectively arranged above the air bin and above the first spray mechanism. The packing layer below the first spray mechanism is arranged on the lower support plate, and the packing layer below the second spray mechanism is arranged on the upper support plate; the first spray mechanism is installed on the bottom surface of the upper support plate.

4. The acid mist purification device for treating electrolytic copper foil waste gas according to claim 1 or 3, characterized in that: The packing layer is composed of a plurality of PP floating ball fillers, and each packing layer has three layers of fillers evenly arranged.

5. The acid mist purification device for treating waste gas from electrolytic copper foil according to claim 1, characterized in that: The liquid storage tank is connected to the water distribution pipe through two pipes. A circulation pump is arranged on one pipe, and a backup pump is arranged on the other pipe. Valves are arranged between the circulation pump and the liquid storage tank and between the backup pump and the liquid storage tank on the two pipes. The two valves are connected to the controller respectively.

6. The acid mist purification device for treating waste gas from electrolytic copper foil according to claim 1, characterized in that: An electric butterfly valve is arranged on the liquid inlet pipe of the liquid storage tank, and the electric butterfly valve is connected to the controller.

7. The acid mist purification device for treating waste gas from electrolytic copper foil according to claim 1, characterized in that: The liquid storage tank is connected with a water supply pipe, a liquid discharge pipe and an overflow pipe. The water supply pipe includes an automatic water supply pipe and a manual water supply pipe. The overflow pipe is connected to the liquid discharge pipe.

8. The acid mist purification device for treating waste gas from electrolytic copper foil according to claim 1, characterized in that: A filter plate is arranged in the liquid storage tank, a pH detector is arranged on the liquid storage tank, and the pH detector extends into the liquid in the liquid storage tank.

9. The acid mist purification device for treating waste gas from electrolytic copper foil according to claim 1, characterized in that: An observation window is provided on the side wall of the washing tower.

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