Spray tower for treating tail gas generated in preparation of selenium from anode mud

Abstract

The utility model is applicable to the technical field of anode mud treatment, and provides a spray tower for anode mud selenium-making tail gas treatment, which comprises a gas inlet component, the gas inlet component is used for inputting and outputting anode mud selenium-making tail gas, a spray component is mounted in the gas inlet component, and the spray component is used for spraying and removing impurities from the anode mud tail gas; the spraying assembly comprises a shell attached to the air inlet assembly, a water tank is arranged on one side of the shell and is of a cylindrical structure, and a filtering piece is arranged in the water tank and used for collecting fine particles. The device solves the problems that fine particles in the spray tower are easy to circulate and accumulate to cause blockage, the tail gas purification efficiency is low and the spray liquid is wasted, and achieves the technical effects of efficiently removing the fine particles and harmful gas in the tail gas, improving the system stability and reducing the loss of the spray liquid.

Description

Technical Field

[0001] This utility model relates to the field of anode mud treatment technology, and more specifically, it relates to a spray tower for treating tail gas from anode mud selenium production. Background Technology

[0002] Anode slime is an important byproduct of the extraction of valuable metals from anode slime deposits during hydrometallurgical processes, and it contains a certain amount of selenium. To efficiently recover selenium, anode slime is typically heated using a roasting method to oxidize the selenium into selenium dioxide (SeO2) gas, which is then collected as part of the exhaust gas. However, during roasting, the exhaust gas contains not only selenium dioxide but also a certain amount of sulfur oxides and fine particulate matter. If these exhaust gases are not effectively treated, they will not only cause environmental pollution but may also reduce the selenium recovery efficiency.

[0003] In existing technologies, exhaust gas treatment typically employs a two-step method: first, a dust collector removes solid particles, and then a spray tower absorbs selenium dioxide and sulfur dioxide. However, since the content of fine particulate matter generated during roasting is relatively low, using a dust collector alone increases equipment investment and operating costs, and its removal efficiency for selenium dioxide and sulfur dioxide is limited, resulting in low overall treatment efficiency. Therefore, directly removing fine particles from the exhaust gas in a spray tower can not only reduce equipment costs but also improve the absorption efficiency of selenium dioxide and sulfur dioxide, thereby optimizing the exhaust gas treatment process for selenium production from anode mud roasting. However, existing spray towers are prone to clogging due to the accumulation of fine particles when treating selenium dioxide and sulfur dioxide. Simultaneously, particles in the spray liquid are difficult to effectively discharge, forming circulating deposits within the tower, reducing spray efficiency and affecting the exhaust gas purification effect.

[0004] To address the aforementioned issues, this application proposes a spray tower for treating tail gas from anode mud roasting, achieving a more efficient and environmentally friendly tail gas treatment process. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a spray tower for treating the tail gas of anode mud selenium production.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A spray tower for treating tail gas from selenium production from anode mud includes an air inlet assembly for inputting and outputting tail gas from selenium production from anode mud, and a spray assembly installed inside the air inlet assembly for spraying and removing impurities from the tail gas from anode mud.

[0008] The spray assembly includes a housing that fits into the air intake assembly. A water tank is provided on one side of the housing. The water tank has a cylindrical structure and a filter element is provided inside the water tank. The filter element is used to collect fine particles.

[0009] The present invention is further configured such that: the air intake component includes an outer wall, the outer wall is configured as a hollow cylindrical structure, two sets of viewing windows are spaced apart on the outer wall, and an air intake is also provided on the outer wall, the air intake being used to allow exhaust gas to enter.

[0010] The present invention is further configured such that: an air outlet is provided at the top of the outer wall, and the air outlet is used to discharge exhaust gas.

[0011] The present invention is further configured such that: a water pump is provided on one side of the outer shell, a longitudinal water inlet pipe is connected to the top of the water pump, two sets of transverse water inlet pipes are horizontally arranged on the longitudinal water inlet pipe, and a set of spray modules is connected to each set of transverse water inlet pipes.

[0012] The present invention is further configured such that: the spray assembly further includes a mounting beam connected to the outer wall and the inner wall, and a guide plate is installed on the top of the mounting beam.

[0013] The present invention is further configured such that the guide plate is a conical structure with an opening at the bottom, used for guiding the liquid.

[0014] The present invention is further configured such that: a plurality of spray heads are staggered on the spray module, and the spray heads are arranged in a vertical direction.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] 1. The spray tower combines fine particle collection with gas purification. Through the synergistic action of the filter elements and spray heads, it can efficiently remove fine particles from exhaust gas while fully absorbing selenium dioxide and sulfur dioxide, thus improving exhaust gas purification efficiency. The filter elements adopt a disc-shaped structure with a mesh on top, which can effectively capture tiny particles in the exhaust gas, preventing them from entering the internal circulation of the spray tower and causing long-term accumulation of fine particles. This reduces the risk of spray tower blockage and ensures long-term stable and efficient operation of the system.

[0017] 2. The guide vanes inside the spray tower employ a conical structure, effectively guiding the flow of liquid from the spray heads and preventing it from bypassing the filter and flowing directly into the water tank. This design not only slows the liquid flow rate, preventing excessively rapid flow into the filter and insufficient treatment, but also extends the residence time of fine particles in the filtration area, giving them a greater chance of being captured and improving particulate matter removal efficiency. Simultaneously, the reduced flow rate of the spray liquid allows for a more thorough absorption reaction, increasing the absorption rates of selenium dioxide and sulfur dioxide. Furthermore, the guide vanes reduce liquid splashing and waste, allowing excess spray liquid to slowly flow back into the water tank for recycling, effectively minimizing spray liquid loss. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a spray tower for treating tail gas from anode mud production according to this utility model.

[0019] Figure 2 This is a top view of a spray tower for treating tail gas from anode mud according to this utility model.

[0020] Figure 3 for Figure 2 A sectional view along section line AA.

[0021] Figure 4 This is a schematic diagram of the spray assembly in this utility model.

[0022] Figure 5 This is an exploded view of the spray assembly in this utility model.

[0023] Figure 6 This is a schematic diagram of the structure of the spray module of this utility model.

[0024] Figure 7 for Figure 6 A magnified view of a portion of region B in the middle.

[0025] Explanation of reference numerals in the attached drawings: 1. Intake assembly; 11. Outer wall; 12. Viewing window; 13. Intake port; 14. Exit port;

[0026] 2. Spray assembly; 21. Water pump; 22. Longitudinal water inlet pipe; 23. Transverse water inlet pipe; 24. Spray module; 241. Spray head; 25. Guide plate; 251. Mounting beam; 26. Filter element; 27. Water tank; 28. Housing. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] Example 1, please refer to Figures 1-7 The present invention provides the following technical solution:

[0030] Specifically, it refers to a spray tower for treating the tail gas from selenium production from anode mud, including an air inlet assembly 1, which is used for the input and output of the tail gas from selenium production from anode mud, and a spray assembly 2 is installed inside the air inlet assembly 1, which is used to spray and remove impurities from the tail gas from anode mud.

[0031] Please see Figure 1 The intake assembly 1 includes an outer wall 11, which is a hollow cylindrical structure made of corrosion-resistant metal to enhance its oxidation resistance and high-temperature resistance. Two sets of viewing windows 12 are spaced apart on the outer wall 11. These windows are circular and covered with high-strength glass, which has good heat resistance and impact resistance to prevent damage from high-temperature exhaust gas or particulate matter. Operators can observe the internal condition of the assembly 1 through the two sets of viewing windows 12, including airflow status, sediment accumulation, and the operation of the spray system, facilitating maintenance and troubleshooting. An air inlet 13 is also provided on the outer wall 11, located at the bottom of the two sets of viewing windows 12, for allowing exhaust gas to enter.

[0032] Please see Figure 1 An air outlet 14 is provided at the top of the outer wall 11. A bend is connected to the top of the air outlet 14. The curvature of the bend is optimized to reduce airflow resistance and prevent gas backflow. After treatment, the gas is discharged through the bend at the top of the air outlet 14, which is used to discharge exhaust gas. The discharge direction of the air outlet 14 can be adjusted according to actual usage requirements to adapt to different installation environments and gas emission requirements.

[0033] Please see Figure 4The spray assembly 2 includes a housing 28 fitted to the air intake assembly 1. A water tank 27 is provided on one side of the housing 28. The water tank 27 has a cylindrical structure, and its inner wall is coated with an anti-corrosion coating to extend its service life. The water tank 27 contains an alkaline solution, the concentration of which can be selected according to different exhaust gas components to improve the absorption effect. A filter element 26 is provided inside the water tank 27. The filter element 26 has a top-opening disc structure, and a filter screen is provided on the top of the filter element 26. The gap of the filter screen is larger than the diameter of the fine particles to be intercepted. A liquid outlet is provided on one side of the filter element 26, allowing the filtered liquid to flow into the water tank 27. The filter element 26 is used to collect fine particles. When the exhaust gas enters from the air intake 13, some fine particles with a diameter smaller than the filter screen of the filter element 26 will fall directly due to gravity and be collected by the guide plate 25, and then fall into the filter element 26.

[0034] Specifically, a water pump 21 is installed on one side of the outer casing 28. The inlet of the water pump 21 is connected to one side of the water tank 27. The water pump 21 is made of corrosion-resistant material to ensure stable operation even under long-term contact with alkaline solutions. A longitudinal water inlet pipe 22 is connected to the top of the water pump 21. The inner wall of the longitudinal water inlet pipe 22 is coated with an anti-corrosion coating to reduce the erosion of the pipe by alkaline solutions. Two sets of transverse water inlet pipes 23 are horizontally arranged on the longitudinal water inlet pipe 22. Each set of transverse water inlet pipes 23 is connected to a set of spray modules 24. Several sets of spray heads 241 are staggered on the spray modules 24. The spray heads 241 are arranged vertically with the nozzles pointing downwards and are made of corrosion-resistant alloy material to improve their service life. When exhaust gas enters from the air inlet 13, the spray heads 241 spray alkaline solution onto it. The spray angle and flow rate are adjustable to meet the needs of exhaust gas treatment at different concentrations.

[0035] The spray assembly 2 also includes a mounting beam 251 connected to the inner wall of the outer wall 11. The mounting beam 251 is configured in a grid shape to enhance structural stability and ensure that the spray device evenly covers the entire airflow path. A guide plate 25 is mounted on the top of the mounting beam 251. The guide plate 25 is connected to the inner wall of the outer wall 11 via the mounting beam 251. The guide plate 25 is configured as a conical structure with an open bottom and is made of corrosion-resistant material to improve its durability. The guide plate 25 is used to guide the liquid. When the liquid sprayed from the spray head 241 falls downward, it contacts the guide plate 25 and flows slowly into the filter element 26 through the guide plate 25. Due to the shape of the guide plate 25, the liquid is prevented from directly entering the water tank 27 without passing through the filter element 26. Because the liquid flow rate is slowed down by the guide plate 25, the liquid flowing into the filter element 26 moves at a slower speed. This causes the tiny particles to remain at the bottom of the filter element 26 due to gravity, thereby improving the particle removal efficiency. The filtered liquid can overflow into the water tank 27 through the outlet on the side wall of the filter element 26 and enter the circulation system for continued use. This method ensures that fine particles remain in the filter element 26 as much as possible and do not enter the water tank for circulation, avoiding the possibility of clogging of the spray assembly 2, and improving the system's operational stability and maintenance convenience.

[0036] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A spray tower for treating tail gas from anode mud selenium production, characterized in that: It includes an air intake assembly (1), which is used for the input and output of selenium tail gas from anode mud. A spray assembly (2) is installed inside the air intake assembly (1), which is used to spray and remove impurities from the anode mud tail gas. The spray assembly (2) includes a housing (28) that fits into the air intake assembly (1). A water tank (27) is provided on one side of the housing (28). The water tank (27) is configured as a cylindrical structure. A filter element (26) is provided inside the water tank (27). The filter element (26) is used to collect fine particles.

2. The spray tower for treating tail gas from anode mud selenium production according to claim 1, characterized in that: The air intake assembly (1) includes an outer wall (11), which is configured as a hollow cylindrical structure. Two sets of viewing windows (12) are spaced apart on the outer wall (11), and an air inlet (13) is also provided on the outer wall (11). The air inlet (13) is used to allow exhaust gas to enter.

3. A spray tower for treating tail gas from anode mud selenium production according to claim 2, characterized in that: The top of the outer wall (11) is provided with an air outlet (14), which is used to discharge exhaust gas.

4. A spray tower for treating tail gas from anode mud selenium production according to claim 1, characterized in that: A water pump (21) is provided on one side of the outer shell (28). A longitudinal water inlet pipe (22) is connected to the top of the water pump (21). Two sets of transverse water inlet pipes (23) are horizontally arranged on the longitudinal water inlet pipe (22). A set of spray modules (24) is connected to each set of transverse water inlet pipes (23).

5. A spray tower for treating tail gas from anode mud selenium production according to claim 1, characterized in that: The spray assembly (2) also includes a mounting beam (251) connected to the inner wall of the outer wall (11), and a guide plate (25) is mounted on the top of the mounting beam (251).

6. A spray tower for treating tail gas from anode mud selenium production according to claim 5, characterized in that: The guide plate (25) is configured as a conical structure with an open bottom for guiding the liquid.

7. A spray tower for treating tail gas from anode mud selenium production according to claim 4, characterized in that: The spray module (24) is provided with several sets of spray heads (241) arranged alternately, and the spray heads (241) are arranged in the vertical direction.

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