Acid mist scrubber tower for zinc smelting treatment

Abstract

The application relates to the technical field of smelting, and discloses an acid mist purification tower for zinc smelting treatment, which comprises a purification tower body, an acid mist inlet pipe for supplying gas transmission is externally circumscribed at the lower end of the purification tower body, an inner sleeve is fixed in the inner part of the purification tower body, an upper protective sleeve is fixed at the top end of the purification tower body and the inner sleeve, active carbon fixing frames are installed at equal intervals in the inner part of the upper protective sleeve, and a rotating disc is movably sleeved at the outer part of the purification tower body and outside the active carbon fixing frames. The acid mist purification tower for zinc smelting treatment drives the acid mist to be sprayed and filtered through the inner part of the inner sleeve, meanwhile, a second fan is started, the second fan drives the acid mist to be transmitted to the inner part of the purification tower body through the gas transmission pipe, the space utilization rate is improved when the acid mist is purified in the inner part of the purification tower body, and the acid mist is filtered through spraying and active carbon, so that the purification efficiency of the acid mist is improved.

Description

Technical Field

[0001] This invention relates to the field of smelting technology, specifically to an acid mist purification tower for zinc smelting. Background Technology

[0002] Zinc smelting primarily involves two processes: pyrometallurgical smelting and hydrometallurgical smelting. Pyrometallurgical smelting includes methods such as vertical ladle smelting, closed blast furnace smelting, and electric furnace smelting. This process first roasts zinc concentrate to obtain zinc oxide, then smelts it with a reducing agent to obtain metallic zinc, and finally obtains liquid zinc through high-temperature distillation. Hydrometallurgical smelting mainly uses acidic solvents to dissolve zinc from the raw materials, obtaining a zinc salt solution, which is then reduced to produce metallic zinc. During zinc smelting, acidic fumes are generated. Direct emission of these acid fumes can pollute the environment. Purification towers are typically used to filter the acid fumes, removing harmful substances and thus purifying them.

[0003] Existing purification towers mostly use a spray method to bring the neutralizing liquid into contact with the acid mist, thereby purifying the acid mist. However, the acid mist after spraying contains impurities, which are usually adsorbed a second time using activated carbon. But since activated carbon can only adsorb a certain amount of impurities, it needs to be replaced when it becomes saturated. During the replacement of activated carbon, the purification tower needs to be shut down, resulting in a decrease in overall purification efficiency. Therefore, we propose an acid mist purification tower for zinc smelting. Summary of the Invention

[0004] To address the shortcomings of existing acid mist purification towers used in zinc smelting, this invention provides an acid mist purification tower for zinc smelting. The tower features activated carbon installed inside an activated carbon fixing frame. Rotating a rotating disc controls the position of a conversion sleeve, which houses the activated carbon fixing frame and activated carbon. Rotating the frame and carbon allows for easy replacement of the activated carbon, thus solving the problems mentioned in the background section.

[0005] This invention provides the following technical solution: an acid mist purification tower for zinc smelting, comprising a purification tower body, an acid mist inlet pipe for supplying gas connected to the lower end of the purification tower body, an inner sleeve fixed inside the purification tower body, an upper protective sleeve fixed to the top of the purification tower body and the inner sleeve, activated carbon fixing frames installed at equal intervals inside the upper protective sleeve, a rotating disk movably sleeved outside the purification tower body and outside the activated carbon fixing frames, an installation plate fixed in the middle of the inner sleeve, a spray device extending into the inner sleeve and penetrating outside the purification tower body, a gas reflux chamber fixed to the top of the inner sleeve, a gas transmission pipe extending to the bottom of the purification tower body fixed to the lower end of the gas reflux chamber, a second fan installed in the middle of the gas reflux chamber, a transmission pipe for driving gas discharge installed at the top of the purification tower body, a first fan installed at the end of the transmission pipe, and an outlet pipe connected to the first fan.

[0006] Preferably, activated carbon is installed inside the activated carbon fixing frame, and filter holes are installed inside the activated carbon.

[0007] Preferably, a conversion sleeve is installed on one side of the outer side of the rotating disk, aligned with the activated carbon fixing frame. A partition is installed inside the conversion sleeve. Another set of activated carbon fixing frames is installed inside the conversion sleeve and on one side of the partition. The two sets of activated carbon fixing frames and the partition form a circular tube sleeve.

[0008] Preferably, a limiting block is fixed to the outside of the purification tower body to limit the position of the rotating disk, and the limiting block is located at the lower end of the rotating disk.

[0009] Preferably, a sprayer is fixed to the end of the acid mist inlet pipe, the sprayer is installed at the lower end of the mounting plate, a filter screen is installed inside the mounting plate, and a protective cover is installed at the upper end of the mounting plate.

[0010] Preferably, the gas transmission pipe passes through the bottom end of the mounting plate and the inner sleeve, and the end of the gas transmission pipe extends between the purification tower body and the inner sleeve.

[0011] Preferably, a neutral liquid return pipe extending into the interior of the purification tower body is fixed to the exterior of the lower end of the mounting plate, and the neutral liquid return pipe is located at the lower end of the gas transmission pipe.

[0012] Preferably, a return pipe is installed on the side of the outlet pipe, valves are installed inside the outlet pipe and the return pipe, the other end of the return pipe is installed outside the acid mist inlet pipe, and an air quality detector is installed inside the first fan.

[0013] Preferably, the interior of the purification tower body is filled with neutralizing liquid, and the other side of the spray device is connected to the neutralizing liquid filled inside the purification tower body via a water pump.

[0014] Compared with existing acid mist purification towers used in zinc smelting, the present invention has the following advantages: 1. This acid mist purification tower for zinc smelting involves an activated carbon fixing frame and activated carbon installed inside an upper protective sleeve. The inner sleeve divides the interior of the purification tower body. The activated carbon filters the passing acid mist. During continuous filtration, rotating a disc aligns a conversion sleeve with the corresponding activated carbon fixing frame and activated carbon. The conversion sleeve contains new activated carbon fixing frames and activated carbon. Rotating the activated carbon fixing frames allows for easy replacement of the activated carbon, ensuring convenient replacement without interfering with activated carbon in other locations. This ensures continuous purification within the purification tower body, improving purification efficiency.

[0015] 2. This acid mist purification tower for zinc smelting uses an inner sleeve to spray and filter acid mist. At the same time, a second fan is started, which drives the acid mist through a gas transmission pipe to the interior of the purification tower body. This ensures that the acid mist is purified inside the purification tower body, improves space utilization, and improves the purification efficiency of acid mist through spraying, activated carbon and other filtration methods.

[0016] 3. This acid mist purification tower for zinc smelting processes discharges purified acid mist through a transmission pipe. Simultaneously, a detection instrument monitors the acid mist to determine if it meets standards. If the acid mist meets standards, it is discharged through the outlet pipe. If the acid mist fails to meet standards, the valve is closed, and the valve installed inside the return pipe is opened. Simultaneously, the acid mist is returned to the acid mist inlet pipe via the return pipe, ensuring further purification and maintaining overall purification efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of cross-section structure; Figure 3 For the present invention Figure 1 Front view of the structural diagram; Figure 4 This is a schematic cross-sectional view of the purification tank of the present invention; Figure 5 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 6 For the present invention Figure 2 Enlarged structural diagram at point B.

[0018] In the diagram: 1. Purification tower body; 2. Acid mist inlet pipe; 3. Spraying; 4. Inner sleeve; 5. Upper protective sleeve; 6. Activated carbon fixing frame; 7. Activated carbon; 8. Rotating disc; 9. Limiting block; 10. Conversion sleeve; 11. Baffle plate; 12. Mounting plate; 13. Filter screen; 14. Spraying device; 15. Gas transmission pipe; 16. Neutralization liquid return pipe; 17. Gas return chamber; 18. Transmission pipe; 19. First fan; 20. Gas outlet pipe; 21. Valve; 22. Return pipe; 23. Second fan. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6An acid mist purification tower for zinc smelting includes a tower body 1. An acid mist inlet pipe 2, supplying gas, is connected externally to the lower end of the tower body 1. The acid mist inlet pipe 2 carries the acid mist through a spray nozzle 3 to the interior of the tower body 1, ensuring effective acid mist output. An inner sleeve 4 is fixed inside the tower body 1. An upper protective sleeve 5 is fixed to the top of the tower body 1 and the inner sleeve 4. The upper protective sleeve 5 is installed at the top of the tower body 1. The inner sleeve 4 and the upper protective sleeve 5 divide the interior of the tower body 1 into two areas to prevent interference from the filtered acid mist. Activated carbon fixing frames 6 are installed at equal intervals inside the upper protective sleeve 5. A rotating disk 8 is movably fitted outside the tower body 1 and outside the activated carbon fixing frames 6. Rotating the rotating disk 8 adjusts the position of the conversion sleeve 10, ensuring the activated carbon is properly fixed. The convenience and controllability of replacing the fixed frame 6 and activated carbon 7 are achieved by fixing an installation plate 12 in the middle of the inner sleeve 4, installing a spray device 14 extending into the inner sleeve 4 through the outside of the purification tower body 1, fixing a gas return chamber 17 at the top of the inner sleeve 4, starting the second fan 23 installed inside the gas return chamber 17, the second fan 23 drives the gas upward to provide power, fixing a gas transmission pipe 15 extending to the bottom of the purification tower body 1 at the lower end of the gas return chamber 17, installing the second fan 23 in the middle of the gas return chamber 17, installing a transmission pipe 18 that drives the gas to be discharged at the top of the purification tower body 1, and installing a first fan 19 at the end of the transmission pipe 18. After the acid mist is purified inside the purification tower body 1, the purified acid mist is discharged through the first fan 19, and the first fan 19 is connected to an outlet pipe 20.

[0021] Please see Figure 4 Activated carbon 7 is installed inside the activated carbon fixing frame 6. The activated carbon 7 has filter holes installed inside and is installed inside the inner sleeve 4 through the activated carbon fixing frame 6. When the filtered and treated gas is transported between the purification tower body 1 and the inner sleeve 4, it is also transported to the interior of the activated carbon 7. The activated carbon 7 further filters the acid mist, improving the overall filtration effect of the acid mist and ensuring the safety of the discharged gas.

[0022] Please see Figure 4A conversion sleeve 10 is installed on one side of the rotating disc 8, aligned with the activated carbon fixing frame 6. A partition 11 is installed inside the conversion sleeve 10. Another set of activated carbon fixing frames 6 is installed inside the conversion sleeve 10 and on one side of the partition 11. The two sets of activated carbon fixing frames 6 and the partition 11 form a circular tube sleeve, which is connected to the outside of the purification tower body 1 by the rotating disc 8. Rotating the rotating disc 8 causes the partition 11 to align with the corresponding activated carbon fixing frames 6, ensuring that the conversion sleeve 10 is adjusted with the activated carbon 7 that needs to be replaced. A brand-new activated carbon fixing frame 6 and activated carbon 7 are installed inside the conversion sleeve 10. Rotating the activated carbon fixing frames 6 and activated carbon 7 causes them to be replaced, thereby improving the convenience of replacing the activated carbon fixing frames 6 and activated carbon 7. During the replacement of the corresponding activated carbon fixing frames 6 and activated carbon 7, the activated carbon fixing frames 6 and activated carbon 7 in other parts can continue to filter, ensuring that the replacement of activated carbon 7 does not interfere with the filtration of acid mist.

[0023] Please see Figure 4 A limiting block 9 is fixed to the outside of the purification tower body 1 to limit the position of the rotating disk 8. The limiting block 9 is located at the lower end of the rotating disk 8 and is installed on the outside of the purification tower body 1. The rotating disk 8 is installed at the upper end of the limiting block 9. The limiting block 9 limits the position of the rotating disk 8 to ensure that the rotating disk 8 maintains stability when it is positioned.

[0024] Please see Figure 6 A spray nozzle 3 is fixed at the end of the acid mist inlet pipe 2. The spray nozzle 3 is installed at the lower end of the mounting plate 12. A filter screen 13 is installed inside the mounting plate 12. A protective cover is installed at the upper end of the mounting plate 12. The mounting plate 12 is installed inside the inner sleeve 4. The filter screen 13 is installed inside the mounting plate 12. After the spray nozzle 3 initially conveys the acid mist to the interior of the purification tower body 1, the filter screen 13 filters the acid mist. At the same time, the filtered acid mist is conveyed to the upper end of the mounting plate 12. The spray device 14 is activated. The spray device 14 atomizes the neutralizing liquid. The atomized neutralizing liquid sprays the acid mist to further remove harmful substances from the acid mist. The sprayed liquid is conveyed to the outside of the mounting plate 12 and then flows back to the interior of the purification tower body 1 through the neutralizing liquid return pipe 16.

[0025] Please see Figure 2 and Figure 5The gas transmission pipe 15 passes through the bottom of the mounting plate 12 and the inner sleeve 4, and the end of the gas transmission pipe 15 extends between the purification tower body 1 and the inner sleeve 4. The gas transmission pipe 15 extends to the lower end of the purification tower body 1. After the acid mist is filtered, it is transmitted upward. The second fan 23 is started to increase the upward power. At the same time, it is transmitted to the lower end of the purification tower body 1 through the gas transmission pipe 15. The acid mist is mixed with the neutralizing liquid again, and the mixed acid mist is transmitted between the purification tower body 1 and the inner sleeve 4. It is then filtered and discharged through the activated carbon 7 to improve the acid mist filtration effect.

[0026] Please see Figure 2 A neutralizing liquid return pipe 16 extending into the interior of the purification tower body 1 is fixed to the exterior of the mounting plate 12. The neutralizing liquid return pipe 16 is located at the lower end of the gas transmission pipe 15. The neutralizing liquid return pipe 16 is fixed to the exterior of the mounting plate 12 and extends to the lower end of the purification tower body 1. After the spraying device 14 sprays the acid mist, the neutralizing liquid after spraying flows back into the interior of the purification tower body 1 through the neutralizing liquid return pipe 16, ensuring that the neutralizing liquid can be easily recycled and reused after subsequent treatment.

[0027] Please see Figure 1 and Figure 3 A return pipe 22 is installed on the side of the outlet pipe 20. Valves 21 are installed inside the outlet pipe 20 and the return pipe 22. The other end of the return pipe 22 is installed outside the acid mist inlet pipe 2. An air quality detector is installed inside the first fan 19. The first fan 19 is installed outside the transmission pipe 18. When the first fan 19 is started, it drives the gas to output to the outside to provide power. At the same time, an air quality detector is installed inside the first fan 19. When the acid mist detected is not up to standard, the valve 21 installed inside the outlet pipe 20 is closed and the valve 21 installed inside the return pipe 22 is opened. The acid mist is driven back to the acid mist inlet pipe 2 through the return pipe 22. At the same time, it is transported again to the purification tower body 1 through the spray 3 for filtration to ensure that the discharged acid mist meets the standards.

[0028] Please see Figure 2 The purification tower body 1 is filled with neutralizing liquid, and the other side of the spray device 14 is connected to the neutralizing liquid filled inside the purification tower body 1 through a water pump. The neutralizing liquid is filled at the lower end of the purification tower body 1, and the acid mist is sprayed, neutralized and filtered through the neutralizing liquid, thereby improving the treatment effect of acid mist and improving the purification effect of acid mist.

[0029] Working Principle: During operation, acid mist is generated during zinc smelting. The acid mist is transported to the interior of the purification tower body 1 via acid mist inlet pipe 2. Simultaneously, the acid mist is uniformly transported upwards by spraying 3. A filter screen 13 is installed inside the mounting plate 12, filtering solid impurities in the acid mist to ensure the flue gas reaches the interior of the inner sleeve 4. Meanwhile, a neutralizing liquid is sprayed via a spraying device 14. The sprayed neutralizing liquid mixes with the acid mist, further removing harmful substances. The second fan 23 is activated, driving the gas to the upper part, providing power for the movement of the acid mist. Simultaneously, the initially sprayed acid mist flows back to the bottom of the purification tower body 1 via gas transmission pipe 15, returning to the space between the purification tower body 1 and the inner sleeve 4. The purified acid mist is then transported to the interior of activated carbon 7, which adsorbs impurities from the acid mist through activated carbon adsorption. The purified acid mist is then transported to the interior of the inner sleeve 4 via a transmission pipe installed at the upper end of the purification tower body 1. 18. Discharge, start the first fan 19. The first fan 19 discharges acid mist using power and a detection instrument to check if the acid mist meets the standard. If it meets the standard, it is directly discharged through the exhaust pipe 20. If it does not meet the standard, the valve 21 installed inside the exhaust pipe 20 is closed, and the acid mist flows back to the inside of the acid mist inlet pipe 2 through the return pipe 22, where it is filtered again to ensure that the quality of the discharged acid mist meets the standard. The activated carbon 7 needs to be replaced regularly. During the replacement of activated carbon 7, rotate the rotating disk 8. The rotating disk 8 moves the conversion sleeve 10 to the outside of the corresponding activated carbon fixing frame 6. At the same time, the corresponding activated carbon fixing frame 6 and activated carbon 7 are installed inside the conversion sleeve 10. Rotating the activated carbon fixing frame 6 and activated carbon 7 can replace the activated carbon 7 that needs to be replaced. During the replacement of activated carbon 7, the activated carbon 7 in other parts can continue to filter, ensuring that the replacement of activated carbon 7 will not interfere with the purification of acid mist.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An acid mist purification tower for zinc smelting, comprising a purification tower body (1), wherein an acid mist inlet pipe (2) for supplying gas is externally connected to the lower end of the purification tower body (1), an inner sleeve (4) is fixed inside the purification tower body (1), and an upper protective sleeve (5) is fixed to the top of the purification tower body (1) and the inner sleeve (4), characterized in that: The upper protective sleeve (5) is equipped with activated carbon fixing frames (6) at equal intervals inside. The purification tower body (1) is movably sleeved with a rotating disk (8) outside the activated carbon fixing frames (6). The middle part of the inner sleeve (4) is fixed with an installation plate (12). The purification tower body (1) is installed through the inner sleeve (4) and extends into the inner sleeve (4). The top of the inner sleeve (4) is fixed with a gas return chamber (17). The lower end of the gas return chamber (17) is fixed with a gas transmission pipe (15) extending to the bottom of the purification tower body (1). The middle part of the gas return chamber (17) is equipped with a second fan (23). The top of the purification tower body (1) is equipped with a transmission pipe (18) that drives the gas to be discharged. The end of the transmission pipe (18) is equipped with a first fan (19). The first fan (19) is connected to an outlet pipe (20). Activated carbon (7) is installed inside the activated carbon fixing frame (6). Filter holes are installed inside the activated carbon (7). A conversion sleeve (10) is installed on one side of the rotating disk (8) aligned with the activated carbon fixing frame (6). A partition (11) is installed inside the conversion sleeve (10). Another set of activated carbon fixing frames (6) is installed inside the conversion sleeve (10) and on one side of the partition (11). The two sets of activated carbon fixing frames (6) and the partition (11) form a circular tube sleeve.

2. The acid mist purification tower for zinc smelting according to claim 1, characterized in that: The purification tower body (1) is fixed with a limiting block (9) that limits the position of the rotating disk (8), and the limiting block (9) is located at the lower end of the rotating disk (8).

3. The acid mist purification tower for zinc smelting according to claim 1, characterized in that: The end of the acid mist inlet pipe (2) is fixed with a spray coating (3), the spray coating (3) is installed at the lower end of the mounting plate (12), the mounting plate (12) is equipped with a filter screen (13), and the upper end of the mounting plate (12) is equipped with a protective cover.

4. The acid mist purification tower for zinc smelting according to claim 1, characterized in that: The gas transmission pipe (15) passes through the bottom end of the mounting plate (12) and the inner sleeve (4), and the end of the gas transmission pipe (15) extends between the purification tower body (1) and the inner sleeve (4).

5. The acid mist purification tower for zinc smelting according to claim 1, characterized in that: The lower end of the mounting plate (12) is fixed with a neutral liquid return pipe (16) extending into the interior of the purification tower body (1), and the neutral liquid return pipe (16) is located at the lower end of the gas transmission pipe (15).

6. The acid mist purification tower for zinc smelting according to claim 1, characterized in that: A return pipe (22) is installed on the side of the outlet pipe (20). A valve (21) is installed inside the outlet pipe (20) and the return pipe (22). The other end of the return pipe (22) is installed outside the acid mist inlet pipe (2). An air quality detector is installed inside the first fan (19).

7. The acid mist purification tower for zinc smelting according to claim 1, characterized in that: The interior of the purification tower body (1) is filled with neutralizing liquid, and the other side of the spray device (14) is connected to the neutralizing liquid filled inside the purification tower body (1) via a water pump.

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