A device for gas-liquid separation in hazardous waste industry exhaust gas treatment

Abstract

This utility model provides a gas-liquid separation device for waste gas treatment in the hazardous waste industry, belonging to the technical field of [missing information]. It includes a roller shutter filter, an absorption tower, a UV photolysis / photocatalytic decomposition device, an activated carbon adsorption / catalytic combustion device, an induced draft fan, and an exhaust stack. A demisting separation device is connected between the absorption tower and the UV photolysis / photocatalytic decomposition device. The demisting separation device includes multiple demisting components within a housing. Each demisting component includes an annular mounting frame and a support frame, and a wire mesh structure is provided between every two adjacent support frames. This utility model enables the treatment of gas-liquid entrainment after the waste gas passes through the absorption tower, effectively separating most of the mist from the exhaust gas, reducing the impact of high-concentration water mist on the performance and lifespan of activated carbon, and maintaining appropriate humidity for UV photolysis and photocatalytic decomposition. This has a positive effect on stimulating active oxygen and hydroxyl free radicals, and rapidly completing oxidation and deodorization.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of hazardous waste exhaust gas treatment equipment, specifically a gas-liquid separation device for waste gas treatment in the hazardous waste industry. Background Technology

[0002] In the process of treating exhaust gas in the hazardous waste industry, the absorption tower, as the core front-end treatment equipment, uses principles such as acid-base neutralization and physical dissolution to efficiently wash and treat acidic gases (such as HCl and SO2), alkaline gases (such as NH3), and water-soluble gases (such as H2S) in the collected exhaust gas. However, for malodorous and organic gases such as dioxins and volatile organic compounds (VOCs) that are difficult to remove by washing, it is necessary to use back-end processes such as activated carbon adsorption, catalytic combustion (RCO), UV photolysis, and photocatalytic decomposition for deep purification.

[0003] After being washed by the absorption tower, the exhaust gas inevitably carries a large number of fine water droplets and mist. The high concentration of water mist formed poses multiple risks to subsequent treatment: In the UV photolysis catalysis stage, water mist weakens the penetration ability of ultraviolet rays, reduces photolysis efficiency, and causes malfunctions such as scaling and short circuits on the lamp surface; For activated carbon adsorption devices, water mist not only occupies the pores of activated carbon, reducing the specific surface area utilization rate and causing a decrease in adsorption capacity, but also causes the honeycomb activated carbon to crumble at the edges and pulverize on the surface due to long-term moisture, significantly shortening the replacement cycle; In addition, water mist entering the catalytic combustion equipment can easily poison the active sites of the catalyst, reduce catalytic efficiency, and increase equipment maintenance costs.

[0004] Based on this, we need to develop a gas-liquid separation device for the treatment of waste gas in the hazardous waste industry to reduce the gas-liquid entrainment phenomenon after the waste gas passes through the absorption tower. This can effectively avoid the problems of reduced adsorption capacity and lifespan of activated carbon, as well as reduced UV photocatalytic capacity. Utility Model Content

[0005] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. Specifically, this utility model mainly provides a gas-liquid separation device for the treatment of waste gas in the hazardous waste industry, which solves the technical problems mentioned in the background art, such as the gas-liquid entrainment phenomenon after the waste gas passes through the absorption tower, which can lead to a decrease in the adsorption capacity and lifespan of activated carbon, as well as a decrease in the UV photocatalytic catalysis capacity.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] A gas-liquid separation device for treating waste gas in the hazardous waste industry includes a roller shutter filter, an absorption tower, a UV photolysis / photocatalytic decomposition device, an activated carbon adsorption / catalytic combustion device, an induced draft fan, and an exhaust stack, all connected by pipelines. A demisting separation device is connected between the absorption tower and the UV photolysis / photocatalytic decomposition device via a pipeline. The demisting separation device separates mist from the exhaust gas. The demisting separation device includes multiple linearly distributed demisting components within a housing. Each demisting component includes an annular mounting frame and equally spaced supporting frames arranged around the annular mounting frame. The supporting frames are inclined, and a wire mesh structure is provided between every two adjacent supporting frames. The surrounding distribution of the wire mesh structure forms an inverted annular truncated cone.

[0008] Furthermore, the multiple defogging components are arranged in a tightly stacked manner;

[0009] And / or, multiple defogging components are arranged at equal intervals along the vertical direction, with the spacing between adjacent components remaining consistent.

[0010] Furthermore, the annular mounting bracket is indirectly connected to the inner wall of the outer shell of the defoaming separation device via a bracket;

[0011] And / or, the annular mounting bracket is directly connected to the inner wall of the outer casing of the defoaming separation equipment by bolts.

[0012] Furthermore, each of the aforementioned support frames has an angle of 30 to 45 degrees with the horizontal plane.

[0013] Furthermore, the defoaming assembly also includes a central structure, which includes a connecting block and a drainage block, and the connecting block and the drainage block are detachably connected.

[0014] Furthermore, the drainage block has a conical structure, a cylindrical structure, or a frustum structure.

[0015] Furthermore, the connecting block is located on the central axis of the annular mounting frame, and multiple welding ports are arranged around the connecting block in an evenly spaced manner, with each welding port connected to the lower end of the corresponding support frame.

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

[0017] This invention, through its specially designed demisting component, addresses the gas-liquid entrainment phenomenon after the exhaust gas passes through the absorption tower. It effectively separates most of the mist from the exhaust gas, reducing the moisture content and thus mitigating the impact of high-concentration water mist on the performance and lifespan of activated carbon. This effectively avoids the risk of a sharp drop in adsorption efficiency and secondary pollution caused by activated carbon damage, significantly increasing the activated carbon replacement cycle and reducing equipment maintenance costs. Simultaneously, it maintains appropriate humidity for UV photolysis and photocatalysis, which positively affects the activation of reactive oxygen species and hydroxyl radicals, rapidly achieving oxidation and deodorization. Overall purification efficiency is improved, significantly enhancing the environmental adaptability and operational economy of the hazardous waste exhaust gas treatment system.

[0018] This invention utilizes a support frame and a wire mesh structure, with the support frame at an angle of 30 to 45 degrees to the horizontal plane. This allows multiple wire mesh structures to form an inverted annular truncated cone, facilitating the flow of small droplets when they come into contact with the fine filaments on the wire mesh structure. The droplets flow along the filaments to the junction of two filaments, accelerating the formation of larger droplets. These droplets then flow to the lowest point of the wire mesh structure, i.e., the side wall of the drainage block, where they are collected and discharged. This improves the efficiency of drainage and further enhances the efficiency of separating the mist from the gas.

[0019] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall waste disposal process of this utility model;

[0021] Figure 2 This is a schematic diagram of the distribution structure of the defoaming component of this utility model;

[0022] Figure 3 This is an exploded structural diagram of the defoaming component of this utility model;

[0023] Figure 4 This is a schematic diagram of the connection between the connecting block and the guide block of this utility model.

[0024] In the diagram: 1. Roller shutter filter; 2. Absorption tower; 3. Defoaming separation equipment; 4. UV photolysis / photocatalytic decomposition device; 5. Activated carbon adsorption / catalytic combustion equipment; 6. Exhaust fan; 7. Exhaust stack; 8. Defoaming assembly; 81. Annular mounting frame; 82. Central structure; 821. Connecting block; 822. Drainage block; 823. Weld joint; 83. Support frame; 84. Wire mesh structure. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Please refer to the appendix carefully. Figures 1-4 A gas-liquid separation device for treating waste gas in the hazardous waste industry includes a roller shutter filter 1, an absorption tower 2, a UV photolysis / photocatalytic decomposition device 4, an activated carbon adsorption / catalytic combustion device 5, an induced draft fan 6, and an exhaust stack 7, all connected by pipes. A demisting separation device 3 is connected between the absorption tower 2 and the UV photolysis / photocatalytic decomposition device 4 via a pipe. The demisting separation device 3 separates mist from the exhaust gas. The demisting separation device 3 includes multiple linearly distributed demisting components 8 within a housing. Each demisting component 8 includes an annular mounting frame 81 and equally spaced surrounding support frames 83 within the annular mounting frame 81. The support frames 83 are inclined, and a wire mesh structure 84 is provided between every two adjacent support frames 83. The surrounding distribution of the wire mesh structure 84 forms an inverted annular frustum. The demisting components 8 modify the modules connected to the absorption tower 2, performing gas-liquid separation on the exhaust gas, reducing the moisture concentration in the exhaust gas, and protecting the subsequent deodorization module.

[0029] The above structure enables the treatment of gas-liquid entrainment after the waste gas passes through the absorption tower 2. It can effectively separate most of the mist from the exhaust gas, reduce the moisture content in the gas, thereby reducing the impact of high concentration water mist on the performance and service life of activated carbon. It effectively avoids the risk of a sharp drop in adsorption efficiency and secondary pollution caused by activated carbon damage, significantly improves the replacement cycle of activated carbon, and reduces equipment maintenance costs. At the same time, it can maintain appropriate humidity for UV photolysis and photocatalysis, which has a positive effect on stimulating active oxygen and hydroxyl free radicals and quickly completing oxidation and deodorization. The overall purification efficiency is improved, and the environmental adaptability and operational economy of the hazardous waste exhaust gas treatment system are significantly enhanced.

[0030] The specific operation is as follows: the waste gas generated by the hazardous waste collection and storage site / disposal site is collected through pipelines. First, it passes through the roller shutter filter 1 to preliminarily filter and remove particulate matter from the waste. The waste gas is then washed and treated by the absorption tower 2, which can effectively absorb the acid, alkali and water-soluble gases in the tail gas. After washing, the waste gas passes through the demister component 8 in the demister separation equipment 3.

[0031] When gas carrying mist rises at a certain speed through the wire mesh structure 84 in the demisting component 8, due to the inertia of the rising mist, the mist collides with the fine filaments of the wire mesh structure 84 and adheres to the surface of the fine filaments. Due to the diffusion of the mist and the gravity settling of the mist, the mist forms larger droplets, which flow along the fine filaments to the junction of the two filaments. The wettability of the fine filaments, the surface tension of the liquid, and the capillary action of the fine filaments make the droplets larger and larger. When the accumulated droplets are large enough that their own gravity is greater than or equal to the resultant force of the rising force of the gas and the surface tension of the liquid, the droplets will flow along the fine filaments to the side wall of the guide block 822 and separate and fall. Thus, after the gas passes through the wire mesh structure 84, it is basically free of mist, and the fine mist carried in the exhaust gas can be removed.

[0032] The odorous and organic gases in the exhaust gas are further treated by activated carbon adsorption, catalytic combustion, UV photolysis, and photocatalysis. After treatment, the relevant indicators of the exhaust gas can meet the discharge standards and are discharged through the exhaust pipe 7 guided by the induced draft fan 6.

[0033] Please refer to the appendix carefully. Figure 2 and attached Figure 3Multiple demisting components 8 are arranged in a tightly stacked manner; and / or, multiple demisting components 8 are arranged at equal intervals along the vertical direction, with the spacing between adjacent components remaining consistent. Different arrangement methods have a significant impact on key indicators such as mist separation efficiency, system resistance, and anti-clogging performance. The stacked distribution has the characteristics of compact structure, high space utilization, and strong resistance to airflow fluctuations. Moreover, the dense wire mesh layer can buffer airflow pulsations, which helps to maintain stable demisting efficiency. The equidistant arrangement results in low system resistance, good energy economy, strong anti-clogging ability, long maintenance cycle, and adaptability to high dust content and high viscosity exhaust gas. The annular mounting frame 81 is indirectly connected to the inner wall of the outer shell of the demisting separation device 3 through a bracket; and / or, the annular mounting frame 81 is directly connected to the inner wall of the outer shell of the demisting separation device 3 through bolts. Different installation methods can better cope with complex installation environments. The angle between each support frame 83 and the horizontal plane is 30 to 45 degrees, so that each wire mesh structure 84 is in an inclined state, which is conducive to airflow.

[0034] Please refer to the appendix carefully. Figure 3 and attached Figure 4 The defoaming assembly 8 also includes a central structure 82, which includes a connecting block 821 and a drainage block 822. The connecting block 821 and the drainage block 822 are detachably connected, which facilitates the subsequent cleaning of the drainage block 822. The drainage block 822 can be a conical, cylindrical, or frustum-shaped structure, and can be replaced with different shapes according to actual needs. The connecting block 821 is located on the central axis of the annular mounting frame 81. Multiple welding ports 823 are arranged around the connecting block 821 in an evenly spaced manner, and each welding port 823 is connected to the lower end of the corresponding support frame 83. During the installation process, the lower end of the support frame 83 is first welded into the corresponding welding port 823, then the wire mesh structure 84 is installed between the support frames 83, and then the installed part is placed into the annular mounting frame 81. The upper end of the support frame 83 can rest on the annular protrusion on the inner wall of the annular mounting frame 81 for locking and positioning or welding.

[0035] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A gas-liquid separation device for treating waste gas in the hazardous waste industry, comprising a roller shutter filter (1), an absorption tower (2), a UV photolysis / photocatalytic decomposition device (4), an activated carbon adsorption / catalytic combustion device (5), an induced draft fan (6), and an exhaust stack (7), connected by pipelines, characterized in that, The absorption tower (2) and the UV photolysis / photolysis catalytic device (4) are connected by a pipe to a defoaming separation device (3). The defoaming separation device (3) separates the mist in the exhaust gas. The defoaming separation device (3) includes multiple linearly distributed defoaming components (8) in the outer shell. Each defoaming component (8) includes an annular mounting frame (81) and support frames (83) that are evenly distributed around the annular mounting frame (81). The support frames (83) are inclined, and a wire mesh structure (84) is provided between each two adjacent support frames (83). The surrounding distribution of the wire mesh structure (84) forms an inverted annular frustum.

2. The device for gas-liquid separation in hazardous waste industry waste gas treatment according to claim 1, characterized in that, The multiple defogging components (8) are arranged in a tightly stacked manner; And / or, multiple defogging components (8) are arranged equidistantly in the vertical direction, with the spacing between adjacent components remaining consistent.

3. The device for gas-liquid separation in hazardous waste industry waste gas treatment according to claim 1, characterized in that, The annular mounting bracket (81) is indirectly connected to the inner wall of the outer shell of the defoaming separation device (3) through a bracket; And / or, the annular mounting bracket (81) is directly connected to the inner wall of the outer shell of the defoaming separation device (3) by bolts.

4. The device for gas-liquid separation in hazardous waste industry waste gas treatment according to claim 1, characterized in that, Each of the aforementioned support frames (83) has an angle of 30 to 45 degrees with the horizontal plane.

5. The device for gas-liquid separation in hazardous waste industry waste gas treatment according to claim 1, characterized in that, The defoaming assembly (8) also includes a central structure (82), which includes a connecting block (821) and a drainage block (822), and the connecting block (821) and the drainage block (822) are detachably connected.

6. The device for gas-liquid separation in hazardous waste industry waste gas treatment according to claim 5, characterized in that, The drainage block (822) has a conical structure, a cylindrical structure, or a frustum structure.

7. The device for gas-liquid separation in hazardous waste industry waste gas treatment according to claim 5, characterized in that, The connecting block (821) is located on the central axis of the annular mounting frame (81). Multiple welding ports (823) are arranged around the connecting block (821) in an evenly spaced manner, and each welding port (823) is connected to the lower end of the corresponding support frame (83).

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