Environment-friendly electroplating exhaust gas treatment tower

Abstract

The utility model discloses an environmental protection type electroplating waste gas treatment tower, this environmental protection type electroplating waste gas treatment tower includes: treatment tower, and treatment tower includes first tower body, second tower body and third tower body, second tower body and third tower body all are arranged as spraying cavity, and the lateral wall of second tower body is provided with the input pipeline for inputting waste gas, and the input pipeline is arranged as the arc pipeline along the lateral wall extension of second tower body, and the top of third tower body is provided with the discharge pipeline, and treatment tower still includes first liquid collecting part, second liquid collecting part and third liquid collecting part, and first liquid collecting part cooperatively sets up in the bottom side of discharge pipeline, and second liquid collecting part sets up in the middle part of third tower body, and third liquid collecting part sets up in the bottom of third tower body and extends to second tower body, environmental protection type electroplating waste gas treatment tower realizes the functional division through multistage tower body, and the arc input pipeline forms the contact area and the residence time of great increase waste gas and spraying liquid of class wind vortex structure, and promotes purification efficiency.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment equipment technology, and in particular to an environmentally friendly electroplating waste gas treatment tower. Background Technology

[0002] Electroplating processes generate waste gases containing cyanide, acid and alkali mists, chromic acid mists, and various metal dusts. These components pose significant hazards to the environment and human health, and must be effectively treated before being released. Spray absorption towers are currently one of the mainstream devices for treating such waste gases. Their principle is to atomize the absorbent liquid (such as alkaline solution, water, or specific reagents) and allow it to fully contact the counter- or cross-flowing waste gases, removing pollutants through physical absorption or chemical reaction.

[0003] Existing spray gas treatment towers typically employ packed towers or empty tower spray structures. Packed towers increase the gas-liquid contact area by filling the tower with packing materials such as Pall rings and Raschig rings. While offering high treatment efficiency, they suffer from drawbacks such as easy packing blockage, high operating resistance, and frequent maintenance and cleaning, making them particularly unsuitable for treating dust-laden or easily crystallizing waste gases. Empty tower spray structures, while less prone to blockage, suffer from insufficient gas-liquid mixing, short residence time of waste gas within the tower, and unstable purification efficiency. Utility Model Content

[0004] Therefore, it is necessary to provide an environmentally friendly electroplating waste gas treatment tower to address the technical problems of insufficient gas-liquid mixing and unstable purification efficiency in existing waste gas treatment towers.

[0005] An environmentally friendly electroplating waste gas treatment tower includes a multi-section treatment tower stacked vertically. The treatment tower includes a first tower body as a base, a second tower body disposed on top of the first tower body, and a third tower body disposed on top of the second tower body. Both the second tower body and the third tower body are configured as spray chambers, and the side wall of the second tower body is provided with an input pipe for inputting exhaust gas; The input pipe is configured as an arc-shaped pipe extending along the side wall of the second tower body and smoothly connected to the interior of the second tower body, so as to form a wind-like vortex structure that guides the exhaust gas to rotate and rise inside the second tower body. The top of the third tower is provided with a discharge pipe, which is connected to the interior of the third tower through the top wall of the third tower. The processing tower further includes a first liquid collection section, a second liquid collection section, and a third liquid collection section; The first liquid collection section is disposed on the bottom side of the discharge pipe to prevent falling droplets from directly entering the discharge pipe; The second liquid collection section is located in the middle of the third tower body, with its outwardly expanding edge connected to the inner wall of the third tower body and its converging end extending towards the bottom. The third liquid collection section is located at the bottom of the third tower body and extends into the second tower body. Its top side section is connected to the inner wall of the third tower body, and its bottom side section extends to the bottom side of the connection between the input pipe and the second tower body. The contraction trend of the bottom side section is gentler than that of the top side section.

[0006] In one embodiment, the central axis of the air inlet port of the input pipe is set at an acute angle or a right angle to the radial direction of the second tower body.

[0007] In one embodiment, the arcuate extension direction of the input pipe extends circumferentially along the side wall surface of the second tower body.

[0008] In one embodiment, the direction of extension of the input pipe is the same as the direction of rotation of the exhaust gas expected to form within the second tower body.

[0009] In one embodiment, the top wall of the third tower is configured as a tapered, converging tower top structure.

[0010] In one embodiment, the discharge pipe is located at the top of the tower structure.

[0011] In one embodiment, the first liquid collection section is connected to the inner wall of the tower top structure via a connecting rod and is configured as a conical cover corresponding to the bottom side of the discharge pipe opening.

[0012] In one embodiment, the second liquid collection section is configured as an inverted frustum-shaped structure with the top and bottom connected.

[0013] In one embodiment, the inner wall surface of the second liquid collection section is smooth.

[0014] In one embodiment, the top and bottom sections of the third liquid collection section are integrally formed into an inverted two-section frustum-shaped converging structure.

[0015] In one embodiment, the top and bottom sections of the third liquid collection section are transitioned by a smooth curved surface.

[0016] In one embodiment, a spraying system is provided in the spray chamber of both the second tower body and the third tower body. The spraying system includes an annular water distribution pipe and multiple atomizing nozzles. The annular water distribution pipe is arranged circumferentially along the inner wall of the tower body.

[0017] In one embodiment, the treatment tower further includes a circulating liquid tank and a circulating pump. The circulating liquid tank is connected to the first tower body and is used to collect the spray liquid falling inside the tower. The inlet end of the circulating pump is connected to the circulating liquid tank, and the outlet end is connected to the spray system inside the second and third tower bodies through a pipeline.

[0018] In one embodiment, the third tower body is filled with a packing layer above both the third liquid collection section and the second liquid collection section.

[0019] In one embodiment, a demister is provided inside the discharge duct.

[0020] The aforementioned environmentally friendly electroplating waste gas treatment tower achieves functional zoning (air intake and preliminary treatment, deep treatment, and demisting emission) through a multi-section tower body. The arc-shaped input pipe forms a vortex-like structure, significantly increasing the contact area and residence time between the waste gas and the spray liquid, thus improving purification efficiency. The coordinated arrangement of the three-stage liquid collection section (i.e., the first, second, and third collection sections) constitutes a highly efficient droplet interception and diversion system: the first collection section prevents the escape of top droplets; the second collection section intercepts and collects medium-sized droplets in the rising airflow; and the unique two-section extension design of the third collection section effectively collects the upper layer of falling liquid, while its gently converging bottom section avoids excessive interference with the rotating airflow at the bottom, ensuring the stability of the vortex. The overall solution has a compact structure and excellent purification and liquid-gas separation effects. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an environmentally friendly electroplating waste gas treatment tower in one embodiment; Figure 2 This is a schematic diagram of the structure of an environmentally friendly electroplating waste gas treatment tower in one embodiment; Figure 3 for Figure 2 A schematic cross-sectional view of part AA in the illustrated embodiment. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Please see Figures 1 to 3 This utility model discloses an environmentally friendly electroplating waste gas treatment tower, which includes a multi-section treatment tower stacked vertically. The treatment tower includes a first tower body 1 serving as a base, a second tower body 2 located on top of the first tower body 1, and a third tower body 3 located on top of the second tower body 2. Both the second tower body 2 and the third tower body 3 are configured as spray chambers. An input pipe 4 for inputting waste gas is provided on the side wall of the second tower body 2. The input pipe 4 is an arc-shaped pipe extending along the side wall of the second tower body 2 and smoothly connected to the interior of the second tower body 2, forming a vortex-like structure within the second tower body 2 to guide the waste gas to rotate and rise. An exhaust pipe 5 is provided at the top of the third tower body 3. 5. The process tower is connected to the interior of the third tower body 3 through the top wall of the third tower body 3; the processing tower also includes a first liquid collection section 6, a second liquid collection section 7, and a third liquid collection section 8; the first liquid collection section 6 is disposed on the bottom side of the discharge pipe 5 to prevent falling droplets from directly entering the discharge pipe 5; the second liquid collection section 7 is disposed in the middle of the third tower body 3, its outwardly expanding edge is connected to the inner wall of the third tower body 3, and its converging end extends to the bottom side; the third liquid collection section 8 is disposed at the bottom of the third tower body 3 and extends into the second tower body 2, its top side section is connected to the inner wall of the third tower body 3, and its bottom side section extends to the bottom side of the connection between the input pipe 4 and the second tower body 2, and the converging trend of the bottom side section is gentler than that of the top side section. Based on the above configuration, the environmentally friendly electroplating waste gas treatment tower of this solution realizes functional zoning (air intake and preliminary treatment, deep treatment, and demisting emission) through a multi-section tower body. The arc-shaped input pipe 4 forms a vortex-like structure, which greatly increases the contact area and residence time between the exhaust gas and the spray liquid, improving purification efficiency. The coordinated arrangement of the three-stage liquid collection section (i.e., the first liquid collection section 6, the second liquid collection section 7, and the third liquid collection section 8) constitutes a highly efficient droplet interception and diversion system: the first liquid collection section 6 prevents the escape of droplets from the top; the second liquid collection section 7 intercepts and collects medium-sized droplets in the rising airflow; the unique two-stage extension design of the third liquid collection section 8 can effectively collect the upper layer of falling liquid, while its gently converging bottom section can avoid excessive interference with the bottom rotating airflow, ensuring the stability of the vortex. The overall solution has a compact structure and good purification and liquid-gas separation effects.

[0029] Furthermore, the central axis of the inlet port of the input pipe 4 is set at an acute angle or a right angle to the radial direction of the second tower body 2. In one embodiment, the arcuate extension direction of the input pipe 4 extends circumferentially along the side wall surface of the second tower body; in another embodiment, the extension direction of the input pipe is the same as the rotation direction of the exhaust gas expected to form within the second tower body 2. The acute angle or right angle between the inlet port of the input pipe 4 and the radial direction structurally forces the exhaust gas to enter with a tangential component. Working together with the arcuate pipe, it can more effectively and stably generate and maintain a strong rotating airflow within the second tower body 2, thereby ensuring the efficiency basis of the core mass transfer process.

[0030] Furthermore, the top wall of the third tower body 3 is configured as a conical, tapering tower top structure 9. Specifically, on one hand, the discharge pipe 5 is located at the top of the tower top structure 9; on the other hand, the first liquid collecting part 6 is connected to the inner wall of the tower top structure 9 via a connecting rod 10, and is configured as a conical cover corresponding to the bottom side of the discharge pipe 5 opening. The conical tower top structure of the third tower body 3 facilitates the convergence of airflow towards the outlet, reducing vortex dead angles, while the conical cover suspended by the connecting rod, as the first liquid collecting part 6, physically blocks the discharge outlet without significantly increasing resistance, effectively preventing the direct discharge of droplets caused by airflow entrainment or condensation.

[0031] Furthermore, the second liquid collecting section 7 is configured as an inverted frustum-shaped structure with the top and bottom connected. Specifically, in one embodiment, the inner wall surface of the second liquid collecting section 7 is smooth. The inverted frustum shape and smooth inner wall of the second liquid collecting section 7 allow droplets impacting it to quickly converge and flow out along the wall surface. At the same time, the smooth surface is less prone to adhering to contaminants, facilitating cleaning and maintenance, and ensuring its liquid collecting function and long-term operational stability.

[0032] Furthermore, the top and bottom sections of the third liquid collecting section 8 are integrally formed inverted two-section frustum-shaped converging structures. Specifically, in one embodiment, the top and bottom sections of the third liquid collecting section 8 are connected by a smooth curved surface. The integral forming of the third liquid collecting section 8 reduces structural connection points, enhances overall strength, and prevents leakage. At the same time, the smooth transition guides the liquid to fall smoothly, preventing the liquid from splashing at this point and being carried away by the airflow again, thus improving the liquid-gas separation efficiency.

[0033] Furthermore, in some embodiments, a spray system (not shown) is provided in the spray chamber of both the second tower body 2 and the third tower body 3. The spray system includes an annular water distribution pipe and multiple atomizing nozzles. The annular water distribution pipe is arranged circumferentially along the inner wall of the tower body. The combination of the annular water distribution pipe and the multiple atomizing nozzles ensures that the spray liquid is evenly distributed across the cross-section of the tower body, forming a dense curtain of droplets that fully mixes and contacts the rotating and rising exhaust gas, maximizing the absorption or reaction area.

[0034] Furthermore, in some embodiments, the treatment tower further includes a circulating liquid tank (not shown) and a circulating pump (not shown). The circulating liquid tank is connected to the first tower body 1 and is used to collect the spray liquid falling inside the tower. The inlet end of the circulating pump is connected to the circulating liquid tank, and the outlet end is connected to the spray system inside the second tower body 2 and the third tower body 3 through a pipeline.

[0035] Furthermore, in some embodiments, the third tower body 3 is filled with a packing layer 17 above both the third liquid collection section 8 and the second liquid collection section 7. The packing layer 17 can greatly increase the gas-liquid contact surface area and turbulence, making it particularly suitable for treating pollutants that are difficult to handle. Moreover, by placing it above the liquid collection section, the exhaust gas can undergo further deep purification after initial dehumidification in the liquid collection section, thereby improving the adaptability and upper limit of the purification efficiency of the treatment tower.

[0036] Furthermore, a demister (not shown) is installed inside the emission duct 5. Installing a demister (such as a wire mesh demister or a baffle plate demister) inside the emission duct can capture residual fine mist droplets in the airflow, which is the last important barrier to ensure clean exhaust emissions and compliance with stringent emission standards.

[0037] In summary, the environmentally friendly electroplating waste gas treatment tower disclosed in this utility model achieves functional zoning (air intake and preliminary treatment, deep treatment, and demisting emission) through a multi-section tower body. Specifically, the arc-shaped input pipe forms a vortex-like structure, which greatly increases the contact area and residence time between the waste gas and the spray liquid, improving purification efficiency. The coordinated arrangement of the three-stage liquid collection section (i.e., the first, second, and third liquid collection sections) constitutes a highly efficient droplet interception and diversion system: the first liquid collection section prevents the escape of top droplets; the second liquid collection section intercepts and collects medium-sized droplets in the rising airflow; and the unique two-section extension design of the third liquid collection section effectively collects the upper layer of falling liquid, while its gently converging bottom section avoids excessive interference with the rotating airflow at the bottom, ensuring the stability of the vortex. The overall solution has a compact structure and excellent purification and liquid-gas separation effects.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An environmentally friendly electroplating waste gas treatment tower, characterized in that, include: A multi-segment processing tower stacked vertically, the processing tower including a first tower body as a base, a second tower body disposed on top of the first tower body, and a third tower body disposed on top of the second tower body; Both the second tower body and the third tower body are configured as spray chambers, and the side wall of the second tower body is provided with an input pipe for inputting exhaust gas; The input pipe is configured as an arc-shaped pipe extending along the side wall of the second tower body and smoothly connected to the interior of the second tower body, so as to form a wind-like vortex structure that guides the exhaust gas to rotate and rise inside the second tower body. The top of the third tower is provided with a discharge pipe, which is connected to the interior of the third tower through the top wall of the third tower. The processing tower further includes a first liquid collection section, a second liquid collection section, and a third liquid collection section; The first liquid collection section is disposed on the bottom side of the discharge pipe to prevent falling droplets from directly entering the discharge pipe; The second liquid collection section is located in the middle of the third tower body, with its outwardly expanding edge connected to the inner wall of the third tower body and its converging end extending towards the bottom. The third liquid collection section is located at the bottom of the third tower body and extends into the second tower body. Its top side section is connected to the inner wall of the third tower body, and its bottom side section extends to the bottom side of the connection between the input pipe and the second tower body. The contraction trend of the bottom side section is gentler than that of the top side section.

2. The environmentally friendly electroplating waste gas treatment tower according to claim 1, characterized in that, The central axis of the air inlet port of the input pipe is set at an acute angle or a right angle to the radial direction of the second tower body.

3. The environmentally friendly electroplating waste gas treatment tower according to claim 2, characterized in that, The arc-shaped extension direction of the input pipe extends circumferentially along the side wall surface of the second tower body.

4. The environmentally friendly electroplating waste gas treatment tower according to claim 3, characterized in that, The top wall of the third tower is designed as a tapered, converging tower top structure.

5. The environmentally friendly electroplating waste gas treatment tower according to claim 4, characterized in that, The discharge pipe is located at the top of the tower structure.

6. The environmentally friendly electroplating waste gas treatment tower according to claim 5, characterized in that, The first liquid collection section is connected to the inner wall of the tower top structure via a connecting rod and is configured as a conical cover corresponding to the bottom side of the discharge pipe opening.

7. The environmentally friendly electroplating waste gas treatment tower according to claim 6, characterized in that, The second liquid collection section is configured as an inverted frustum-shaped structure with the top and bottom connected.

8. The environmentally friendly electroplating waste gas treatment tower according to claim 7, characterized in that, The inner wall of the second liquid collection section is smooth.

9. The environmentally friendly electroplating waste gas treatment tower according to claim 8, characterized in that, The top and bottom sections of the third liquid collection section are integrally formed into an inverted two-section frustum-shaped converging structure.

10. The environmentally friendly electroplating waste gas treatment tower according to claim 9, characterized in that, The third tower body is filled with a packing layer above both the third liquid collection section and the second liquid collection section.

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