A multi-stage adsorption apparatus for VOCs based on activated carbon

Abstract

This utility model discloses a multi-stage VOCs adsorption device based on activated carbon, comprising: a slot provided in the chamber, a sealing block slidably connected in the slot, a tray provided on the inner side of the sealing block, activated carbon laid on the tray, support plates fixedly connected to the left and right sides of the chamber, a fixing plate fixedly connected to the upper surface of the support plate, a spring fixedly connected to the side surface of the fixing plate, a sealing strip fixedly connected to the end of the spring away from the fixing plate, a sealing rubber strip fixedly connected to the side surface of the sealing strip near the chamber, guide posts provided on the fixing plate, and guide blocks and sealing plates fixedly connected to the left and right sides of the chamber respectively. Through the design of two sets of slots in the chamber, combined with the slidably connected sealing block and the tray with activated carbon, a multi-stage adsorption structure is formed, which can realize the layered interception and deep adsorption of VOCs; at the same time, the sliding assembly structure of the tray and the sealing block makes it possible to replace the activated carbon without disassembling the entire device, but only by pulling out the tray.

Description

Technical Field

[0001] This utility model relates to the field of VOCs purification technology, and more specifically, to a VOCs multi-stage adsorption device based on activated carbon. Background Technology

[0002] With the rapid development of industrial manufacturing, industries such as chemicals, printing, coating, and electronics generate large amounts of waste gas containing volatile organic compounds (VOCs) during production processes. Currently, VOCs waste gas treatment technologies mainly include adsorption, catalytic combustion, absorption, and membrane separation. Among these, adsorption is the most widely used for treating low- to medium-concentration VOCs waste gas due to its relatively simple equipment structure, low operating costs, and stable purification effect. Activated carbon, as a commonly used adsorption material, has characteristics such as a large specific surface area, abundant pore structure, and strong adsorption capacity. It is the core carrier for VOCs adsorption treatment, and activated carbon-based adsorption equipment has become one of the mainstream equipment for industrial VOCs treatment.

[0003] However, existing activated carbon-based VOCs adsorption equipment still has many shortcomings in practical applications: On the one hand, most equipment adopts a single-stage adsorption structure or a simple stacked multi-stage adsorption form, and the activated carbon filling method is relatively fixed, making it difficult to achieve layered interception and deep adsorption of VOCs waste gas. This results in VOCs components in the waste gas not being able to fully contact the activated carbon, and some low-concentration VOCs easily penetrating the adsorption layer, reducing the overall purification efficiency. At the same time, activated carbon carriers mostly adopt fixed installation designs (such as fixed filters, integrated filling chambers, etc.). When the activated carbon is saturated and needs to be replaced, the equipment shell or core components need to be disassembled, which is cumbersome, difficult to maintain, and results in long downtime, seriously affecting the continuity of industrial production and limiting its practicality. Moreover, the sealing performance is the key to ensuring the treatment effect during the flow of VOCs waste gas inside the equipment. The sealing structure design of existing equipment is relatively simple, often using a single sealing strip directly attached to the contact surface of the equipment, lacking effective pressure compensation and guiding and limiting mechanisms. For example, patent document publication number CN220257613U describes a VOCs tail gas purification device based on granular activated carbon adsorption. However, it still has some drawbacks in actual use, such as: adopting a single-stage adsorption structure, resulting in low purification efficiency; inconvenient replacement of activated carbon; and insufficient sealing, which limits its use. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a VOCs multi-stage adsorption device based on activated carbon, so as to solve the problems of low purification efficiency, inconvenience in replacing activated carbon, and insufficient sealing of the single-stage adsorption mechanism in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a VOCs multi-stage adsorption device based on activated carbon, comprising: a box body, wherein the box body is provided with slots, and two sets of slots are provided; a sealing block is slidably connected in the slots; a support plate is provided on the inner side of the sealing block; activated carbon is laid on the support plate; support plates are fixedly connected to the left and right sides of the box body; a fixing plate is fixedly connected to the upper surface of the support plate; a spring is fixedly connected to the side surface of the fixing plate; a sealing strip is fixedly connected to the end of the spring away from the fixing plate; a sealing rubber strip is fixedly connected to the side surface of the sealing strip near the box body; a guide post is provided on the fixing plate; the guide post is located inside the spring and is slidably connected to the fixing plate; a guide block and a sealing plate are fixedly connected to the left and right sides of the box body respectively; the guide block is fixedly connected to the upper surface of the support plate; and the sealing plate is fixedly connected to the upper surface of the fixing plate.

[0006] The top surface of the housing is provided with a top plate, and an air intake pipe and a flow equalization plate are fixedly connected to the upper and lower surfaces of the top plate, respectively. The air intake pipe passes through the top plate and is connected to the flow equalization plate. Connecting blocks are fixedly connected to the side surfaces of the top plate and the housing, and the connecting blocks are connected by bolts.

[0007] The inner wall of the box is fixedly connected to a flange, a fixing frame is provided on the upper surface of the flange, and a filter screen is provided inside the fixing frame.

[0008] The box is equipped with a condenser tube, which is serpentine in shape. An inlet pipe and an outlet pipe are fixedly connected to the outside of the box, and both the inlet pipe and the outlet pipe are connected to the condenser tube.

[0009] The inner wall of the box is fixedly connected to a fixing block, and a receiving box is fixedly connected to the side surface of the fixing block away from the box. The receiving box is located directly below the condenser pipe.

[0010] The receiving box is equipped with a float drain valve, and a drain pipe is fixedly connected to the bottom of the float drain valve. The drain pipe passes through the box and extends to the outside of the box.

[0011] The guide post has a gripping block at the end away from the sealing strip, and the diameter of the gripping block is larger than the diameter of the guide post.

[0012] An exhaust pipe is fixedly connected to the side surface of the box, and the exhaust pipe is connected to the box and located at the bottom of the box.

[0013] The beneficial effects of the above-mentioned technical solution of this utility model are as follows: a VOCs multi-stage adsorption device based on activated carbon.

[0014] 1. In the above solution, the design of two sets of slots inside the box, together with the sliding connection of the sealing block and the tray covered with activated carbon, forms a multi-level adsorption structure, which can achieve layered interception and deep adsorption of VOCs, greatly improving the purification efficiency of organic waste gas; at the same time, the sliding assembly structure of the tray and the sealing block makes it possible to replace the activated carbon without disassembling the entire equipment, but only by pulling out the tray, which significantly reduces the difficulty of maintenance, reduces equipment downtime, and improves the practicality of actual operation.

[0015] 2. In the above solution, the combination structure of support plates, fixing plates, springs and sealing strips on both sides of the box, along with the sealing rubber strips on the side of the sealing strips, can achieve a tight fit between the sealing strips and the contact surface of the equipment through the elastic force of the springs. This effectively avoids leakage of VOCs during the treatment process, ensuring the waste gas treatment effect and reducing secondary pollution to the surrounding environment. In addition, the guide posts on the fixing plates can limit the extension and contraction direction of the springs, preventing the sealing strips from shifting due to force and affecting the sealing performance, further improving the operational stability of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the transverse cross-sectional structure of the present invention;

[0019] Figure 4 This is a longitudinal sectional view of the present invention.

[0020] [Figure Labels]

[0021] 1. Housing; 2. Air inlet pipe; 3. Top plate; 4. Connecting block; 5. Support plate; 6. Fixing plate; 7. Sealing plate; 8. Grip block; 9. Exhaust pipe; 10. Flow equalization plate; 11. Water inlet pipe; 12. Drain pipe; 13. Water outlet pipe; 14. Guide column; 15. Spring; 16. Guide block; 17. Flange; 18. Fixing frame; 19. Filter screen; 20. Condenser pipe; 21. Fixing block; 22. Receiver box; 23. Float drain valve; 24. Slot; 25. Sealing block; 26. Support plate; 27. Sealing strip; 28. Sealing rubber strip. Detailed Implementation

[0022] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0023] As attached Figure 1 To be continued Figure 4This utility model provides a VOCs multi-stage adsorption device based on activated carbon, comprising: a housing 1, with slots 24 provided inside the housing 1, and two sets of slots 24 provided; a sealing block 25 is slidably connected inside the slots 24; a support plate 26 is provided inside the sealing block 25; activated carbon is laid on the support plate 26; support plates 5 are fixedly connected to the left and right surfaces of the housing 1; a fixing plate 6 is fixedly connected to the upper surface of the support plate 5; a spring 15 is fixedly connected to the side surface of the fixing plate 6; and the end of the spring 15 away from the fixing plate 6 is fixedly connected to... A sealing strip 27 is attached, and a sealing rubber strip 28 is fixedly connected to the side surface of the sealing strip 27 near the housing 1. A guide post 14 is provided on the fixing plate 6. A gripping block 8 is provided at the end of the guide post 14 away from the sealing strip 27. The diameter of the gripping block 8 is larger than the diameter of the guide post 14. The guide post 14 is located inside the spring 15 and is slidably connected to the fixing plate 6. Guide blocks 16 and sealing plates 7 are fixedly connected to the left and right sides of the housing 1, respectively. The guide blocks 16 are fixedly connected to the upper surface of the support plate 5, and the sealing plates 7 are fixedly connected to the upper surface of the fixing plate 6.

[0024] A top plate 3 is provided on the upper surface of the housing 1. An air inlet pipe 2 and a flow equalization plate 10 are fixedly connected to the upper and lower surfaces of the top plate 3, respectively. The air inlet pipe 2 passes through the top plate 3 and is connected to the flow equalization plate 10. Connecting blocks 4 are fixedly connected to the side surfaces of the top plate 3 and the connecting blocks 4 are connected by bolts. A flange 17 is fixedly connected to the inner wall of the housing 1. A fixing frame 18 is provided on the upper surface of the flange 17. A filter screen 19 is provided inside the fixing frame 18. A condenser pipe 20 is provided inside the housing 1. The condenser pipe 20 is serpentine. A water inlet pipe 11 and an outlet pipe are fixedly connected to the outer side of the housing 1. Water pipe 13, inlet pipe 11 and outlet pipe 13 are all connected to condenser pipe 20. A fixing block 21 is fixedly connected to the inner wall of the box 1. A receiving box 22 is fixedly connected to the side surface of the fixing block 21 away from the box 1. The receiving box 22 is located directly below the condenser pipe 20. A float drain valve 23 is provided on the receiving box 22. A drain pipe 12 is fixedly connected to the bottom of the float drain valve 23. The drain pipe 12 passes through the box 1 and extends to the outside of the box 1. An exhaust pipe 9 is fixedly connected to the side surface of the box 1. The exhaust pipe 9 is connected to the box 1 and is located at the bottom of the box 1.

[0025] Specifically, VOCs gas enters the equipment through the inlet pipe 2 on the top plate 3, and after being evenly dispersed by the flow equalization plate 10 connected to the inlet pipe 2, it enters the interior of the chamber 1. The dispersed gas first flows through the filter screen 19 in the fixed frame 18 on the flange 17 of the chamber 1. The filter screen 19 is made of PTFE-coated fiberglass cloth, which filters and removes solid impurities mixed in the gas. The gas that has been preliminarily filtered continues to flow to the serpentine condenser 20 area inside the chamber 1, where the circulating coolant entering through the water inlet pipe 11 and flowing out through the water outlet pipe 13 cools the gas, causing some of the VOCs to be released. The gas condenses into a liquid state; the liquid produced by condensation drips into the receiving box 22 located directly below the condenser tube 20. When the liquid in the receiving box 22 reaches a certain amount, the float drain valve 23 automatically opens, and the liquid is discharged from the equipment through the drain pipe 12 that runs through the box body 1; the gas that has been condensed continues to flow and passes through the activated carbon layer laid on the inner plate 26 of the slot 24 on the box body 1. In the sealed environment formed by the sealing strip 27 and the sealing rubber strip 28, VOCs are adsorbed and purified by the activated carbon; finally, the clean gas after multi-stage treatment is discharged from the equipment through the exhaust pipe 9 at the bottom of the box body 1.

[0026] The working process of this utility model is as follows: VOCs gas enters the equipment through the inlet pipe 2 on the top plate 3, and is evenly dispersed by the flow equalization plate 10 connected to the inlet pipe 2 before entering the interior of the chamber 1; the dispersed gas flows through the PTFE-coated glass fiber cloth filter 19 in the fixed frame 18 on the flange 17 of the chamber 1 to filter and remove solid impurities from the gas; the gas after preliminary filtration flows to the serpentine condenser pipe 20 area inside the chamber 1, and is cooled by the circulating coolant that enters through the water inlet pipe 11 and flows out through the water outlet pipe 13, causing some of the VOCs to condense. Liquid; the liquid generated by condensation drips into the receiving box 22 directly below the condenser pipe 20. When the liquid in the receiving box 22 reaches a certain amount, the float drain valve 23 automatically opens, and the liquid is discharged from the equipment through the drain pipe 12 that runs through the box body 1. The gas after condensation continues to flow and passes through the activated carbon layer laid on the support plate 26 inside the slot 24 of the box body 1. In the sealed environment formed by the sealing strip 27 and the sealing rubber strip 28, VOCs are adsorbed and purified by the activated carbon. The clean gas after multi-stage treatment is discharged from the equipment through the exhaust pipe 9 at the bottom of the box body 1.

[0027] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0028] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0029] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage activated carbon-based VOCs adsorption apparatus, characterized by, include: The box body (1) has a slot (24) inside, and there are two sets of slots (24). A sealing block (25) is slidably connected inside the slot (24). A support plate (26) is provided on the inner side of the sealing block (25). Activated carbon is laid on the support plate (26). Support plates (5) are fixedly connected to the left and right sides of the box body (1). A fixing plate (6) is fixedly connected to the upper surface of the support plate (5). A spring (15) is fixedly connected to the side surface of the fixing plate (6). The spring (15) is away from the fixing plate (6). A sealing strip (27) is fixedly connected to one end of the box (1). A sealing rubber strip (28) is fixedly connected to the side surface of the sealing strip (27) near the box (1). A guide post (14) is provided on the fixing plate (6). The guide post (14) is located inside the spring (15) and is slidably connected to the fixing plate (6). A guide block (16) and a sealing plate (7) are fixedly connected to the left and right sides of the box (1), respectively. The guide block (16) is fixedly connected to the upper surface of the support plate (5), and the sealing plate (7) is fixedly connected to the upper surface of the fixing plate (6).

2. The multi-stage activated carbon-based VOCs adsorption apparatus according to claim 1, wherein, The upper surface of the box (1) is provided with a top plate (3). The upper and lower surfaces of the top plate (3) are respectively fixedly connected with an air inlet pipe (2) and a flow equalization plate (10). The air inlet pipe (2) passes through the top plate (3) and is connected to the flow equalization plate (10). The top plate (3) and the side surfaces of the box (1) are both fixedly connected with connecting blocks (4). The connecting blocks (4) are connected by bolts.

3. The multi-stage activated carbon-based VOCs adsorption apparatus according to claim 1, wherein, The inner wall of the box (1) is fixedly connected with a flange (17), and a fixing frame (18) is provided on the upper surface of the flange (17). A filter screen (19) is provided on the inner side of the fixing frame (18).

4. The multi-stage activated carbon-based VOCs adsorption apparatus according to claim 1, wherein, The box (1) is equipped with a condenser pipe (20), which is serpentine. The outside of the box (1) is fixedly connected to a water inlet pipe (11) and a water outlet pipe (13), and both the water inlet pipe (11) and the water outlet pipe (13) are connected to the condenser pipe (20).

5. The multi-stage activated carbon-based VOCs adsorption apparatus according to claim 1, wherein, A fixing block (21) is fixedly connected to the inner wall of the box (1), and a receiving box (22) is fixedly connected to the side surface of the fixing block (21) away from the box (1). The receiving box (22) is located directly below the condenser pipe (20).

6. The VOCs multi-stage adsorption device based on activated carbon according to claim 5, characterized in that, The receiving box (22) is provided with a float drain valve (23), and the bottom end of the float drain valve (23) is fixedly connected to a drain pipe (12). The drain pipe (12) passes through the box body (1) and extends to the outside of the box body (1).

7. The VOCs multi-stage adsorption device based on activated carbon according to claim 1, characterized in that, The guide post (14) is provided with a gripping block (8) at the end away from the sealing strip (27), and the diameter of the gripping block (8) is larger than the diameter of the guide post (14).

8. The VOCs multi-stage adsorption device based on activated carbon according to claim 1, characterized in that, An exhaust pipe (9) is fixedly connected to the side surface of the box (1). The exhaust pipe (9) is connected to the box (1) and is located at the bottom of the box (1).

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