Flue gas purification structure for non-ferrous metal smelting

Abstract

The utility model discloses a flue gas purification structure for non-ferrous metal metallurgy, which comprises a filter frame and a conveying pipe II, and is characterized in that a filter plate is arranged on the inner side of the filter frame, and an elbow is arranged in the conveying pipe II; the air diffuser is arranged in the conveying pipe II and on one side of the elbow; the filter membrane is arranged between the two groups of filter plates; the air diffuser is composed of a vent groove, a diffusion plate and a connecting plate. According to the utility model, the filter frames, the filter plates, the filter membranes and the water-absorbable filter membranes among the filter plates are adopted, so that water vapor in smoke can be effectively captured, water molecules entering subsequent purification equipment are reduced, the water molecules are prevented from being condensed and attached in the purification equipment, the corrosion problem is reduced, and the elbow plays a role in protecting the turning part of an equipment pipeline; direct impact and friction of flue gas on the surface of the turning position of equipment are reduced, the air diffuser can disperse and homogenize the flue gas, and abrasion to the surface of an equipment pipeline is reduced through cooperation of the elbow and the air diffuser.

Description

Technical Field

[0001] The utility model relates to the technical field of nonferrous metal smelting, in particular to a fume purification structure for nonferrous metal smelting. Background Art

[0002] Nonferrous metal smelting is an important industrial process, including the smelting of copper, aluminum, nickel, zinc and other metals. In these smelting processes, a large amount of smoke and harmful gases will be generated. If they are directly discharged, they will cause atmospheric pollution and adverse effects on human health. In order to reduce environmental pollution, the flue gas needs to be purified. Common flue gas purification structures include flue gas collection, pretreatment, desulfurization, denitrification, heavy metal treatment and other systems. Combined with the existing literature, a smoke separation device for nonferrous metal smelting (CN213286075U) is provided. The smoke separation device is provided with two filter plates with different mesh sizes to filter the smoke. It can not only filter out impurities, dust and solid particles contained in the smoke, but also has the function of realizing solid-gas separation. Through the setting of baffles, gears, etc., it is convenient to clean the dust.

[0003] The existing technology has the following problems:

[0004] 1. In the process of non-ferrous metal smelting, water is usually used as a cooling medium, detergent or humidifier. After contacting with high-temperature smelting materials, this water will evaporate into water vapor and be brought into the flue gas. When a large amount of water vapor exists in the flue gas, water vapor condensation may occur, forming water droplets or water films attached to the surface of the equipment, which may cause short circuit, corrosion or damage to electrical components.

[0005] 2. Under the scouring of high-temperature and high-speed flue gas, the surface of the purification equipment may be worn, especially during the transmission process, the flue gas may contain some solid particles, such as dust, metal powder, etc. These particles cause friction on the surface of the equipment, aggravating the degree of wear.

[0006] To this end, we proposed a flue gas purification structure for non-ferrous metal smelting to solve the above-mentioned drawbacks. Utility Model Content

[0007] The utility model aims to solve the shortcomings in the prior art and proposes a fume purification structure for non-ferrous metal smelting.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A fume purification structure for non-ferrous metal smelting includes a filter frame and two conveying pipes, characterized in that a filter plate is arranged inside the filter frame, and an elbow is arranged inside the two conveying pipes; an air diffuser is arranged inside the two conveying pipes, on one side of the elbow; a filter membrane is arranged between two groups of the filter plates; the air diffuser is composed of a ventilation groove, a diffusion plate, and a connecting plate.

[0010] Preferably, a slide groove is provided on the upper and lower inner walls on both sides of the filter frame, and draw plates are slidably provided at both upper and lower ends of the filter frame, and the draw plates can slide along the slide groove.

[0011] Preferably, multiple groups of second slide grooves are equidistantly provided on the inner walls on both sides of the filter frame, and the two groups of filter plates and the filter membrane in the middle can slide along the second slide grooves, and the tops of the second slide grooves can pass through the filter frame.

[0012] Preferably, the diffuser plates are provided in multiple groups with different sizes, the ventilation groove is located between two adjacent diffuser plates, one end of the multiple diffuser plates is connected and fixed by a connecting plate, and the diffuser plates are all trapezoidal hollow cylindrical cones.

[0013] Preferably, an air inlet is provided on one side of the filter frame, and a delivery pipe 1 is connected to the other side of the filter frame. Flanges are fixedly connected to the connection between the filter frame and the air inlet and the delivery pipe 1.

[0014] Preferably, one end of the delivery pipe is connected to a desulfurization and denitrification box, a deodorization box is provided on one side of the desulfurization and denitrification box, a heat exchanger is provided on one side of the deodorization box, an air outlet is provided at one end of the heat exchanger, and a delivery pipe three is provided between the deodorization box and the heat exchanger.

[0015] Preferably, both ends of the second delivery pipe are connected to the desulfurization and denitrification tank and the deodorization tank, and the internal structure of the second delivery pipe is consistent with that of the third delivery pipe.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) The utility model adopts a filter frame, a filter plate, and a filter membrane. The water-absorbent filter membrane between the two sets of filter plates can effectively capture water vapor in the flue gas, reduce the water molecules entering the subsequent purification equipment, prevent them from condensing and adhering in the purification equipment, and reduce the occurrence of corrosion problems.

[0018] (2) The utility model adopts an elbow, an air diffuser composed of a vent, a diffuser plate, and a connecting plate. The elbow can protect the bend of the equipment pipeline, reduce the direct impact and friction of the smoke on the surface of the equipment bend, and reduce the degree of wear on the equipment surface. The air diffuser disperses and homogenizes the smoke by promoting the mixing and redistribution of air, reduces the flow rate of the smoke, and reduces the impact of solid particles in the smoke on the equipment. The elbow and the air diffuser work together to reduce the wear on the surface of the equipment pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below.

[0020] Figure 1 This is a schematic diagram of a fume purification structure for non-ferrous metal smelting proposed by the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of a second conveying pipe of a fume purification structure for non-ferrous metal smelting proposed by the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of an air diffuser for fume purification for non-ferrous metal smelting proposed by the utility model;

[0023] Figure 4 The utility model is a schematic diagram of the internal structure of a filter frame of a fume purification structure for non-ferrous metal smelting.

[0024] Legend:

[0025] 1. Filter frame; 2. Delivery pipe 1; 3. Desulfurization and denitrification box; 4. Delivery pipe 2; 5. Deodorization box; 6. Delivery pipe 3; 7. Heat exchanger; 8. Air outlet; 9. Air inlet; 10. Flange; 11. Elbow; 12. Air diffuser; 13. Ventilation groove; 14. Diffuser plate; 15. Connecting plate; 16. Chute 1; 17. Pullout plate; 18. Chute 2; 19. Filter plate; 20. Filter membrane. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0027] Example: Figure 1As shown, a flue gas purification structure for non-ferrous metal smelting includes an air inlet 9 on one side of a filter frame 1, through which flue gas is introduced, and then filtered inside the filter frame 1 to remove most of the particulate matter, dust and moisture. The flue gas after filtration, dust removal and moisture removal enters a desulfurization and denitrification box through a conveying pipe 1 2. The flue gas converts sulfur dioxide and nitrogen oxides in the flue gas into non-volatile compounds through chemical reactions. The flue gas after desulfurization and denitrification enters a deodorization box 5 through a conveying pipe 2 4 for deodorization treatment. Common deodorization methods include activated carbon adsorption, catalytic oxidation, etc. A certain amount of heat may still exist in the purified flue gas. The flue gas enters a heat exchanger 7 through a conveying pipe 3 6 for waste heat recovery. After recovery, the flue gas is discharged through an outlet 8 at the other end of the heat exchanger 7.

[0028] like Figure 2 Figure 3 As shown, the elbow 11 provided at the bend of the conveying pipe 24 can reduce the direct impact and friction of the smoke on the surface of the bend of the conveying pipe 24, and reduce the wear degree of the bend surface of the pipe. The air diffuser 12 composed of the ventilation groove 13, the diffusion plate 14, and the connecting plate 15 can realize the dispersion and uniformity of the smoke, and reduce the aggregation and impact of solid particles in the smoke on the surface of the equipment. The smoke enters from the small-area end of the diffusion plates 14 of multiple groups of hollow cylindrical cones of different sizes, passes through the ventilation grooves 13 between the diffusion plates 14, and is discharged from the large-area end of the diffusion plate 14, so that the high-speed smoke is converted into low-speed and uniform smoke.

[0029] like Figure 4 As shown, the draw plate 17 can slide in the slide groove 16 on the inner walls of both sides of the upper and lower ends of the filter frame 1, and the slide groove 2 18 opened on the inner walls of both sides of the filter frame 1 can penetrate the filter frame 1 at the upper end, so as to facilitate the insertion and removal of the filter plate 19 for installation and replacement. The filter membrane 20 between the two groups of filter plates 19 is made of microporous fiber. The microporous fiber has a tiny pore structure, which can adsorb water molecules on the fiber surface and in the pores through surface tension and capillary action. It has a high water absorption speed and water storage capacity, and can quickly adsorb water vapor. When the flue gas passes through the filter frame 1, the solid particles can be removed by the internal filter plate 19, and the water in the flue gas can be removed by the filter membrane 20, thereby reducing the water molecules from entering the subsequent purification structure, preventing them from condensing and adhering in the purification structure, and reducing the occurrence of blockage and corrosion problems.

[0030] Working principle: Flue gas enters from the air inlet 9, is filtered through the filter frame 1 to remove most of the particulate matter, dust and moisture, and enters the desulfurization and denitrification box through the conveying pipe 1 2 after filtration, dust removal and water removal. The flue gas converts sulfur dioxide and nitrogen oxides in the flue gas into non-volatile compounds through chemical reactions. After desulfurization and denitrification, the flue gas enters the deodorization box 5 through the conveying pipe 2 4 for deodorization treatment. The flue gas passes through the air diffuser 12 in the conveying pipe 2 4 to convert high-speed flue gas into low-speed and uniform flue gas. Common deodorization methods include activated carbon adsorption, catalytic oxidation, etc. There may still be a certain amount of heat in the purified flue gas. The flue gas enters the heat exchanger 7 through the conveying pipe 3 6 for waste heat recovery. After recovery, the flue gas is discharged through the outlet 8 at the other end of the heat exchanger 7.

[0031] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A fume purification structure for non-ferrous metal smelting, comprising a filter frame (1) and a conveying pipe (4), characterized in that: A filter plate (19) is arranged inside the filter frame (1), and an elbow (11) is arranged inside the second delivery pipe (4); An air diffuser (12) is arranged inside the second delivery pipe (4) and on one side of the elbow (11); A filter membrane (20) disposed between two sets of filter plates (19); The air diffuser (12) is composed of a ventilation groove (13), a diffusion plate (14), and a connecting plate (15).

2. A fume purification structure for non-ferrous metal smelting according to claim 1, characterized in that: The filter frame (1) has upper and lower inner walls on both sides provided with a slide groove (16), and both upper and lower ends of the filter frame (1) are provided with a draw plate (17) for sliding, and the draw plate (17) can slide along the slide groove (16).

3. The fume purification structure for non-ferrous metal smelting according to claim 1 is characterized in that: The inner walls of both sides of the filter frame (1) are provided with a plurality of groups of second slide grooves (18) at equal intervals, and the two groups of filter plates (19) and the filter membrane (20) in the middle can slide along the second slide grooves (18), and the tops of the second slide grooves (18) can penetrate the filter frame (1).

4. The fume purification structure for non-ferrous metal smelting according to claim 1, characterized in that: The diffuser plates (14) are arranged in multiple groups of different sizes, the ventilation groove (13) is located between two adjacent groups of diffuser plates (14), one end of the multiple groups of diffuser plates (14) are connected and fixed by a connecting plate (15), and the diffuser plates (14) are all trapezoidal hollow cylindrical cones.

5. A fume purification structure for non-ferrous metal smelting according to claim 4, characterized in that: An air inlet (9) is provided on one side of the filter frame (1), and a delivery pipe (2) is connected to the other side of the filter frame (1). Flanges (10) are fixedly connected at the connection points between the filter frame (1) and the air inlet (9) and the delivery pipe (2).

6. A fume purification structure for non-ferrous metal smelting according to claim 5, characterized in that: One end of the delivery pipe 1 (2) is connected to a desulfurization and denitrification box (3), a deodorization box (5) is arranged on one side of the desulfurization and denitrification box (3), a heat exchanger (7) is arranged on one side of the deodorization box (5), an air outlet (8) is arranged at one end of the heat exchanger (7), and a delivery pipe 3 (6) is arranged between the deodorization box (5) and the heat exchanger (7).

7. The fume purification structure for non-ferrous metal smelting according to claim 1, characterized in that: Both ends of the second delivery pipe (4) are connected to the desulfurization and denitrification box (3) and the deodorization box (5), and the internal structure of the second delivery pipe (4) is consistent with that of the third delivery pipe (6).

Images