Acid mist separation and purification device in copper smelting sulfuric acid production

Abstract

The utility model relates to an acid mist separation and purification device in copper smelting sulfuric acid production, and belongs to the technical field of copper smelting. Comprising a purifying cylinder, a U-shaped flow dividing seat and a triangular gas collecting hood, a gas guide pipe is arranged at the top of the purification barrel, a U-shaped flow dividing seat is arranged at the top of the gas guide pipe, a first atomizing nozzle is arranged in the U-shaped flow dividing seat, second atomizing nozzles are distributed around the first atomizing nozzle, and the first atomizing nozzle and the second atomizing nozzles are connected with an absorption liquid supply pipeline; a liquid outlet is formed in the bottom of the purification cylinder; a gas inlet pipe is arranged on the side face of the purifying cylinder, a triangular gas collecting hood is arranged at the top of the U-shaped flow dividing base, and an exhaust port is formed in the top of the triangular gas collecting hood. According to the washing tower, waste gas is in a horizontal dispersion state through the U-shaped flow dividing base and the gas guide pipe, compared with a vertical flowing state of a traditional washing tower, the waste gas is easier to disperse, the resistance of absorption liquid to the waste gas is low, the waste gas purification efficiency can be improved, in addition, the waste gas can make full contact with the absorption liquid, and the waste gas treatment effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of copper smelting technology, and in particular to an acid mist separation and purification device in the production of sulfuric acid in copper smelting. Background Technology

[0002] During copper smelting, a large amount of sulfur dioxide (SO2) gas is generated. This gas is converted into sulfuric acid through a series of chemical reactions. However, this conversion process generates acid mist, which, if directly released into the atmosphere, will cause environmental pollution.

[0003] In copper smelting processes, acid mist is typically introduced into scrubbing towers to remove acidic components and meet emission standards. Existing scrubbing towers generally employ a vertically deployed multi-layered atomizing nozzles to spray purifying liquid that contacts and neutralizes the exhaust gas, ensuring purification effectiveness. However, the vertically falling multiple layers of purifying liquid create resistance to the exhaust gas, reducing its upward velocity and thus lowering purification efficiency. Furthermore, the exhaust gas may tend to flow along the tower walls, resulting in poor treatment performance. Utility Model Content

[0004] To solve or partially solve the problems existing in related technologies, this utility model provides an acid mist separation and purification device in the production of sulfuric acid from copper smelting, aiming to provide a new acid mist separation and purification device.

[0005] The aforementioned acid mist separation and purification device for sulfuric acid production in copper smelting includes a purification cylinder, a U-shaped diversion seat, and a triangular gas collection hood.

[0006] The purification cylinder has an air guide pipe at the top, a U-shaped diverter at the top of the air guide pipe, a first atomizing nozzle facing the air guide pipe at the inner top of the U-shaped diverter, and second atomizing nozzles arranged around the first atomizing nozzle. The first atomizing nozzle and the second atomizing nozzle are connected to the absorbent supply pipe. The purification cylinder has a drain outlet at the bottom.

[0007] The purification cylinder has an air inlet pipe on its side, and a triangular air collection hood is fixedly installed on the top of the U-shaped diverter seat. The top of the triangular air collection hood has an exhaust port.

[0008] In some embodiments, a U-shaped heat exchange tube is provided on the inner circumferential surface of the air intake pipe, and the U-shaped heat exchange tube is evenly spaced around the circumference of the air intake pipe.

[0009] The air inlet pipe is fitted with an inlet water pipe and an outlet water pipe. The inlet water pipe is connected to one end of the U-shaped heat exchange tube, and the other end of the U-shaped heat exchange tube is connected to the outlet water pipe.

[0010] In some designs, a storage tank is located below the drain outlet, and a booster pump is installed on the storage tank. The inlet of the booster pump is connected to the bottom of the storage tank via a pipe, and the outlet of the booster pump is connected to the first atomizing nozzle and the second atomizing nozzle via pipes respectively.

[0011] In some designs, slots are provided on the top of both sides of the U-shaped diverter.

[0012] The filter plate is inserted into the U-shaped diverter seat from the slot.

[0013] In some designs, a sealing plate is fixedly installed at the outer end of the filter plate.

[0014] The technical solution provided by this utility model can include the following beneficial effects:

[0015] This application uses a U-shaped diverter and a gas guide pipe to make the exhaust gas horizontally dispersed. Compared with the vertical flow of traditional scrubbing towers, the exhaust gas is easier to disperse, the resistance of the absorbent liquid to the exhaust gas is lower, which is conducive to improving the efficiency of exhaust gas purification. Furthermore, the exhaust gas can fully contact the absorbent liquid, which improves the effect of exhaust gas treatment.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0017] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0018] Figure 1 This is a schematic diagram of the structure of the acid mist separation and purification device shown in the embodiment of this utility model;

[0019] Figure 2 This is another structural schematic diagram of the acid mist separation and purification device shown in this embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the assembly of the U-shaped diversion seat and the triangular gas collection hood of the acid mist separation and purification device shown in this embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the assembly of the purification cylinder and the storage tank of the acid mist separation and purification device shown in an embodiment of this utility model;

[0022] Figure label:

[0023] 1. Purification cylinder; 101. Drain outlet; 2. U-shaped diverter seat; 201. Slot; 3. Triangular gas collection hood; 301. Exhaust outlet; 4. Air guide pipe; 5. First atomizing nozzle; 6. Second atomizing nozzle; 7. Air inlet pipe; 8. U-shaped heat exchanger pipe; 9. Water inlet pipe; 10. Water outlet pipe; 11. Liquid storage tank; 12. Booster pump; 13. Filter plate; 14. Sealing plate. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited to the content described.

[0025] like Figures 1-4 As shown, this application provides an acid mist separation and purification device for sulfuric acid production in copper smelting, including a purification cylinder 1, a U-shaped diverter seat 2, and a triangular gas collection hood 3; the purification cylinder 1 is generally hollow cylindrical with a conical upper end; the U-shaped diverter seat 2 is generally a U-shaped tube with openings at both ends.

[0026] The purification cylinder 1 has an air guide pipe 4 at its top, and a U-shaped diverter 2 at its top. Specifically, the top of the air guide pipe 4 is connected to the middle of the bottom surface of the U-shaped diverter 2. The inner top of the U-shaped diverter 2 has a first atomizing nozzle 5 facing the outlet of the air guide pipe 4. A second atomizing nozzle 6 is arranged around the first atomizing nozzle 5. Specifically, there are 8 second atomizing nozzles 6, which are arranged at intervals around the first atomizing nozzle 5 and are distributed in a rectangular pattern. The first atomizing nozzle 5 and the second atomizing nozzles 6 are connected to the absorbent supply pipe. The bottom of the purification cylinder 1 has a drain port 101.

[0027] The purification cylinder 1 has an air inlet pipe 7 on its side, and a triangular air collection hood 3 is fixedly installed on the top of the U-shaped diverter seat 2. The top of the triangular air collection hood 3 has an exhaust port 301.

[0028] During operation, the waste gas to be treated is introduced into the purification cylinder 1 through the air inlet pipe 7, and then passes through the air guide pipe 4, the U-shaped diverter seat 2, and the triangular gas collection hood 3 in sequence before being discharged outward from the exhaust port 301.

[0029] In this process, the absorbent liquid is introduced into the first atomizing nozzle 5 and the second atomizing nozzle 6 through the absorbent liquid supply pipe. The first atomizing nozzle 5 sprays the absorbent liquid into the air guide pipe 4, where it reacts with the acidic substances in the exhaust gas to remove acid mist. The second atomizing nozzle 6 sprays the absorbent liquid around the first atomizing nozzle 5, so that after the exhaust gas leaves the air guide pipe 4, it diffuses outward in the U-shaped diverter seat 2 with the air guide pipe 4 as the center, reacting with the absorbent liquid sprayed from the second atomizing nozzle 6 to remove acid mist from the exhaust gas for the second time. This multiple absorption and removal of acid mist effectively ensures that the exhaust gas emissions meet the standards.

[0030] This application uses a U-shaped diverter seat 2 and a gas guide pipe 4 to make the exhaust gas horizontally dispersed. Compared with the vertical flow state of traditional scrubbing towers, the exhaust gas is easier to disperse, the resistance of the absorbent liquid to the exhaust gas is lower, which is conducive to improving the efficiency of exhaust gas purification. Furthermore, the exhaust gas can fully contact the absorbent liquid, which improves the effect of exhaust gas treatment.

[0031] In some specific embodiments, a U-shaped heat exchange tube 8 is provided on the inner circumferential surface of the air inlet pipe 7, and the U-shaped heat exchange tube 8 is evenly spaced around the circumference of the air inlet pipe 7; an inlet pipe 9 and an outlet pipe 10 are provided on the outer sleeve of the air inlet pipe 7, both of which are annular, the inlet pipe 9 is connected to one end of the U-shaped heat exchange tube 8, and the other end of the U-shaped heat exchange tube 8 is connected to the outlet pipe 10.

[0032] During operation, the inlet pipe 9 is connected to the cooling water supply network, and the outlet pipe 10 is connected to the cooling water return network. In this way, the cooling water is introduced into the U-shaped heat exchange tube 8 through the inlet pipe 9 and then flows out from the outlet pipe 10. When the exhaust gas passes through the inlet pipe 7, it comes into contact with the U-shaped heat exchange tube 8, thereby lowering its temperature. This facilitates the condensation of acid mist in the exhaust gas, making it easier for the acid mist to react with the absorbent liquid, thus improving the treatment effect of the device.

[0033] In some specific embodiments, a storage tank 11 is provided below the drain port 101, and a booster pump 12 is provided on the storage tank 11. The inlet end of the booster pump 12 is connected to the inner bottom of the storage tank 11 through a pipe, and the outlet end of the booster pump 12 is connected to the first atomizing nozzle 5 and the second atomizing nozzle 6 through pipes respectively.

[0034] During operation, the absorbent liquid passes through the purification cylinder 1 and is discharged from the drain port 101 into the storage tank 11. Then, it is reintroduced into the first atomizing nozzle 5 and the second atomizing nozzle 6 by the booster pump 12, thereby recycling the absorbent liquid, effectively reducing the amount of absorbent liquid used, and thus reducing the operating cost of the device.

[0035] In some specific embodiments, slots 201 are respectively provided on the top of both sides of the U-shaped diverter 2; the filter plate 13 is inserted into the U-shaped diverter 2 through the slots 201.

[0036] When in use, the purified waste liquid passes through the filter plate 13, effectively removing some solid impurities from the waste gas and improving the waste gas treatment effect. Furthermore, some absorbent liquid droplets inevitably exist in the treated waste gas. These droplets can condense and adhere to the filter plate 13 after passing through it, and finally drip back into the purification cylinder 1, effectively reducing the loss of absorbent liquid.

[0037] At the same time, the residence time of gas in the purification tower can be appropriately extended without affecting production efficiency, changing the traditional vertical path and providing a smoother flow path for the exhaust gas, thereby reducing the resistance of the purification liquid to the airflow, increasing the absorption rate of acidic components, and thus improving the overall purification efficiency.

[0038] In some specific embodiments, a sealing plate 14 is fixedly installed at the outer end of the filter plate 13. When the filter plate 13 is inserted to the limit position, the sealing plate 14 is in contact with the side of the purification cylinder 1 to form a seal, so as to prevent the leakage of waste gas in the purification cylinder 1.

[0039] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An acid mist separation and purification device for sulfuric acid production in copper smelting, characterized in that: Includes a purification cylinder (1), a U-shaped diverter (2), and a triangular gas collection hood (3); The purification cylinder (1) is provided with an air guide pipe (4) at the top, and a U-shaped diverter seat (2) is provided at the top of the air guide pipe (4). The inner top of the U-shaped diverter seat (2) is provided with a first atomizing nozzle (5) facing the air guide pipe (4). A second atomizing nozzle (6) is arranged around the first atomizing nozzle (5). The first atomizing nozzle (5) and the second atomizing nozzle (6) are connected to the absorbent supply pipe. The purification cylinder (1) is provided with a drain port (101) at the bottom. The side of the purification cylinder (1) is provided with an air inlet pipe (7), and the top of the U-shaped diverter (2) is fixedly installed with a triangular air collection hood (3), and the top of the triangular air collection hood (3) is provided with an exhaust port (301).

2. The acid mist separation and purification device in the production of sulfuric acid from copper smelting according to claim 1, characterized in that: The air inlet pipe (7) is provided with a U-shaped heat exchange tube (8) on its inner circumferential surface. The U-shaped heat exchange tube (8) is evenly spaced around the circumference of the air inlet pipe (7). The air inlet pipe (7) is fitted with a water inlet pipe (9) and a water outlet pipe (10). The water inlet pipe (9) is connected to one end of the U-shaped heat exchange pipe (8), and the other end of the U-shaped heat exchange pipe (8) is connected to the water outlet pipe (10).

3. The acid mist separation and purification device for sulfuric acid production in copper smelting according to claim 1, characterized in that: Below the drain port (101) is a storage tank (11), and a booster pump (12) is provided on the storage tank (11). The inlet end of the booster pump (12) is connected to the bottom of the storage tank (11) through a pipe, and the outlet end of the booster pump (12) is connected to the first atomizing nozzle (5) and the second atomizing nozzle (6) through pipes respectively.

4. The acid mist separation and purification device for sulfuric acid production in copper smelting according to claim 1, characterized in that: The top of both sides of the U-shaped diverter (2) is provided with slots (201); The filter plate (13) is inserted into the U-shaped diverter (2) from the slot (201).

5. The acid mist separation and purification device for sulfuric acid production in copper smelting according to claim 4, characterized in that: A sealing plate (14) is fixedly installed at the outer end of the filter plate (13).

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