Waste water treatment device for calcium carbide method acetylene

Abstract

The utility model relates to a calcium carbide method acetylene wastewater treatment device, including treatment jar, aeration structure and spraying structure, its technical key point is: aeration structure includes upper aeration pipe group and lower aeration pipe group, and upper and lower aeration pipe group are respectively by longitudinal arrangement multiple aeration coil, and is equipped with openwork baffle between two adjacent aeration coil, and the bottom of upper and lower aeration pipe group is equipped with openwork support plate, and the top is equipped with openwork cover plate, the inlet pipeline outer end of spraying structure is connected with upper filter, and the inlet of upper filter is connected with wastewater input pipeline, and the bottom center of treatment jar is equipped with water outlet, and the bottom of water outlet is fixed with lower filter, and the outlet of lower filter is connected with liquid phase output pipeline, and liquid phase output pipeline is equipped with circulation branch, and the circulation branch end is equipped with circulating pump, and the outlet pipeline end of circulating pump is communicated with wastewater input pipeline. The device further strengthens acetylene removal effect, and has the effect of filtering impurities before the recycling of sodium hypochlorite.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical wastewater treatment equipment, specifically to a calcium carbide-based acetylene wastewater treatment device. Background Technology

[0002] The crude acetylene gas produced by the calcium carbide process generally needs to be purified with sodium hypochlorite solution to remove impurities. The purified high-purity acetylene gas is then used in the next process. However, the wastewater generated during the purification process contains a small amount of sodium hypochlorite and should not be discharged directly. Instead, it should be recycled and treated.

[0003] For example, CN101624225A discloses an air flotation desorption tower for industrial wastewater treatment, suitable for treating sodium hypochlorite-containing wastewater in acetylene purification processes. It includes a closed cylindrical body, with a liquid inlet pipe at the top and a horizontally arranged aeration device with an air inlet pipe installed at the bottom of the body. The aeration device is a circular aeration pipe with aeration holes. This structure aims to utilize compressed air entering the aeration pipe and then through the aeration holes to fully contact the wastewater, achieving the purpose of acetylene removal, thus reducing pollution and saving energy. However, the contact time between compressed air and wastewater needs to be extended to enhance the acetylene removal effect. Additionally, the wastewater also contains some solid impurities, affecting the recycling of sodium hypochlorite. Utility Model Content

[0004] The purpose of this invention is to provide a reasonably structured and reliable acetylene wastewater treatment device using the calcium carbide method. Compared with the prior art, it further enhances the acetylene removal effect and also has the function of filtering out impurities before the recycling of sodium hypochlorite.

[0005] The technical solution of this utility model is: A treatment device for acetylene wastewater from the calcium carbide process includes a treatment tank, an aeration structure, and a spray structure. The key technical features are: the aeration structure includes an upper aeration pipe group and a lower aeration pipe group spaced apart within the treatment tank. Each upper and lower aeration pipe group is composed of multiple longitudinally arranged aeration coils. A perforated partition is provided between adjacent aeration coils. Perforated support plates are provided at the bottom of the upper and lower aeration pipe groups, and perforated cover plates are provided at the top. Radial aeration holes are provided on the sidewalls of the aeration coils, and the inlets of each aeration coil are led out for treatment. The tank is connected to a compressed air source via a branch pipeline; the outer end of the inlet pipeline of the spray structure is connected to the upper filter, the inlet of the upper filter is connected to the wastewater input pipeline, a discharge port is provided at the center of the bottom of the treatment tank, a lower filter is fixed at the bottom of the discharge port, the outlet of the lower filter is connected to the liquid phase output pipeline, the liquid phase output pipeline has a circulation branch, a circulation pump is provided at the end of the circulation branch, the outlet pipeline of the circulation pump is connected to the wastewater input pipeline, and a gas phase output pipeline is provided at the center of the top of the treatment tank.

[0006] The aforementioned acetylene wastewater treatment device using the calcium carbide method includes a lower filter housing, a horizontal perforated plate located in the middle of the lower filter housing, an inlet located at the top of the lower filter housing and connected to the discharge port, an outlet located on the upper side wall of the lower filter housing, an inclined filter screen located at the inner end of the outlet, and a drain outlet located on the lower side wall of the lower filter housing. The outlet is connected to the inlet of the liquid phase output pipeline.

[0007] The aforementioned acetylene wastewater treatment device using the calcium carbide method includes an upper filter housing, an inclined filter screen located on the upper part of the upper filter housing, a large filter chamber located on the water-facing side of the inclined filter screen, a small filter chamber located on the back side of the inclined filter screen, and a horizontal perforated plate located at the lower part of the large filter chamber. The upper part of the side wall of the large filter chamber is connected to the wastewater inlet pipe, and the upper part of the side wall of the small filter chamber is connected to the inlet pipe of the spray structure.

[0008] In the aforementioned acetylene wastewater treatment device using the calcium carbide method, a foam trap is installed at the inner end of the gas phase output pipeline.

[0009] The beneficial effects of this utility model are: 1. Compressed air is distributed to each aeration coil through a distribution pipeline and then sprayed out through the aeration hole group. Wastewater containing sodium hypochlorite gradually falls onto each aeration coil through the perforated cover plate and perforated partition plate. The upper and lower aeration pipe groups, perforated partition plate, perforated support plate and perforated cover plate structure configuration ensure that the wastewater comes into full and uniform contact with the compressed air sprayed from the aeration hole group during the falling process, thereby removing acetylene gas from the wastewater and greatly reducing the acetylene gas content in the wastewater.

[0010] 2. Use upper and lower filters to filter out solid impurities in the system to ensure the purity of the reused sodium hypochlorite solution and guarantee its effectiveness.

[0011] This invention further enhances the acetylene removal effect and also has the function of filtering out impurities before the recycling of sodium hypochlorite. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Enlarged view of section A in the middle; Figure 3 yes Figure 1 Top view of the perforated cover plate.

[0013] In the diagram: 1. Gas phase output pipeline, 2. Foam trap, 3. Spray structure, 4. Treatment tank, 5. Upper filter, 6. Inclined filter, 7. Horizontal perforated plate, 8. Wastewater input pipeline, 9. Circulation pump, 10. Circulation branch, 11. Perforated cover plate, 12. Aeration coil, 13. Perforated partition, 14. Perforated support plate, 15. Inlet, 16. Diversion pipeline, 17. Discharge port, 18. Lower filter, 19. Sewage outlet, 20. Horizontal perforated plate, 21. Inclined filter, 22. Liquid outlet, 23. Liquid phase output pipeline, 24. Radial aeration hole group. Detailed Implementation

[0014] The present invention will be described in detail with reference to the accompanying drawings.

[0015] like Figures 1-3 As shown, the acetylene wastewater treatment device for the calcium carbide process includes a treatment tank 4, an aeration structure, and a spray structure 3.

[0016] The aeration structure includes an upper aeration pipe group and a lower aeration pipe group arranged at intervals within the treatment tank 4. Each of the upper and lower aeration pipe groups consists of multiple longitudinally arranged aeration coils 12. A perforated partition 13 is provided between adjacent aeration coils 12. A perforated support plate 14 is provided at the bottom of each upper and lower aeration pipe group, and a perforated cover plate 11 is provided at the top. Radial aeration hole groups 24 are provided on the sidewalls of each aeration coil 12. The inlet 15 of each aeration coil 12 leads out of the treatment tank 4 and is connected to a compressed air source via a branch pipe 16. The perforated partition 13, perforated support plate 14, and perforated cover plate 11 have the same structural form.

[0017] The outer end of the inlet pipe of the spray structure 3 is connected to the upper filter 5. The inlet of the upper filter 5 is connected to the wastewater input pipe 8. The bottom center of the treatment tank 4 is provided with a discharge port 17. The bottom of the discharge port 17 is fixed with a lower filter 18. The outlet of the lower filter 18 is connected to the liquid phase output pipe 23. The liquid phase output pipe 23 is provided with a circulation branch 10. The end of the circulation branch 10 is provided with a circulation pump 9. The end of the outlet pipe of the circulation pump 9 is connected to the wastewater input pipe 8.

[0018] In this embodiment, the lower filter 18 includes a lower filter housing, a horizontal perforated plate 20 located in the middle of the lower filter housing, an inlet located at the top of the lower filter housing and connected to the discharge port 17, an outlet 22 located on the upper side wall of the lower filter housing, an inclined filter screen 21 located at the inner end of the outlet 22, and a drain port 19 located on the lower side wall of the lower filter housing. The outlet 22 is connected to the inlet of the liquid phase output pipeline 23. The upper filter 5 includes an upper filter housing, an inclined filter screen 6 located on the upper part of the upper filter housing, a large filter chamber located on the water-facing side of the inclined filter screen 6, a small filter chamber located on the back side of the inclined filter screen, and a horizontal perforated plate 7 located at the lower part of the large filter chamber. The upper part of the side wall of the large filter chamber is connected to the wastewater input pipeline 8, and the upper part of the side wall of the small filter chamber is connected to the inlet pipeline of the spray structure 3.

[0019] The treatment tank 4 is provided with a gas phase output pipe 1 at the top center, and a foam trap 2 is provided at the inner end of the gas phase output pipe 1.

[0020] Working principle: Wastewater containing sodium hypochlorite from the calcium carbide-based acetylene production process is sent to wastewater inlet pipe 8. After passing through wastewater inlet pipe 8, it enters upper filter 5 to filter solid impurities. After filtration, it enters spray structure 3 and is sprayed into treatment tank 4.

[0021] Meanwhile, compressed air is distributed through the diversion pipe 16 into each aeration coil 12, and then sprayed out through the aeration hole group 24. Wastewater containing sodium hypochlorite gradually falls onto each aeration coil 12 through the perforated cover plate 11 and perforated partition plate 13, making full and uniform contact with the compressed air sprayed from the aeration hole group 24 during its descent, thereby removing acetylene gas from the wastewater and greatly reducing its content. To enhance the removal effect, the wastewater can be repeatedly removed using the circulation pump 9 and circulation branch line 10.

[0022] During the removal process, the lower filter 18 is used to filter out impurities in the wastewater again. The impurities fall below the horizontal perforated plate 20. The horizontal perforated plate 20 prevents the impurities from being stirred up and disturbed by the wastewater, and they can be discharged through the drain outlet 19 in a timely manner.

[0023] The wastewater containing acetylene removal contains sodium hypochlorite, which is drawn out of the treatment tank and used to prepare a new sodium hypochlorite solution for reuse in the production process.

[0024] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.

Claims

1. A device for treating acetylene wastewater from the calcium carbide process, comprising a treatment tank, an aeration structure, and a spraying structure, characterized in that: The aeration structure includes an upper aeration pipe group and a lower aeration pipe group arranged at intervals within the treatment tank. Each upper and lower aeration pipe group consists of multiple longitudinally arranged aeration coils. A perforated partition is provided between adjacent aeration coils. A perforated support plate is provided at the bottom of each upper and lower aeration pipe group, and a perforated cover plate is provided at the top. Radial aeration holes are provided on the side walls of each aeration coil. The inlet of each aeration coil leads out of the treatment tank and is connected to a compressed air source via a branch pipeline. The outer end of the inlet pipeline of the spray structure is connected to an upper filter. The inlet of the upper filter is connected to a wastewater input pipeline. A discharge port is located at the center of the bottom of the treatment tank. A lower filter is fixed at the bottom of the discharge port. The outlet of the lower filter is connected to a liquid phase output pipeline. The liquid phase output pipeline has a circulation branch. A circulation pump is located at the end of the circulation branch. The outlet pipeline of the circulation pump is connected to the wastewater input pipeline. A gas phase output pipeline is located at the center of the top of the treatment tank.

2. The acetylene wastewater treatment device according to claim 1, characterized in that: The lower filter includes a lower filter housing, a horizontal perforated plate in the middle of the lower filter housing, an inlet in the top of the lower filter housing and connected to the discharge port, an outlet in the upper side wall of the lower filter housing, an inclined filter screen in the inner end of the outlet, and a drain outlet in the lower side wall of the lower filter housing. The outlet is connected to the inlet of the liquid phase output pipeline.

3. The acetylene wastewater treatment device according to claim 1, characterized in that: The upper filter includes an upper filter housing, an inclined filter screen located on the upper part of the upper filter housing, a large filter chamber located on the water-facing side of the inclined filter screen, a small filter chamber located on the water-repellent side of the inclined filter screen, and a horizontal perforated plate located at the lower part of the large filter chamber. The upper part of the side wall of the large filter chamber is connected to the wastewater inlet pipe, and the upper part of the side wall of the small filter chamber is connected to the inlet pipe of the spray structure.

4. The acetylene wastewater treatment device according to claim 1, characterized in that: The inner end of the gas phase output pipeline is equipped with a mist trap.

Images