An exhaust gas treatment device

Abstract

The utility model discloses a waste gas treatment device, including the dust filter, activated carbon adsorption box and fan that communicate in proper order. Dust filter includes the jar body by flange connection, and its first air inlet pipe mouth accesses lower cylinder body along tangent direction, sets up filter element in the upper cylinder body, and sets up the hole plate with the mounting hole between top head and upper cylinder body, and the ash removal subassembly includes the spray pipe and control valve in top head, and the bottom of bottom head is equipped with the unloading device. The activated carbon adsorption box is equipped with several drawer type carbon boxes in the layered arrangement on the guide rail. The utility model discloses the combination of cyclone preseparation and filter cartridge filtration, cooperates high -efficient ash removal, and effectively handles high -concentration fine particle viscosity dust, adopts the drawer type carbon box, and makes the activated carbon convenient replacement, and airflow distribution is even. The whole set of device is high in integration, and the synergic treatment efficiency is good, solves traditional craft ash removal difficult, maintenance complex, adsorption easy to jam the problem, is applicable to the purification of dust organic waste gas of powder coating industry etc.

Description

Technical Field

[0001] This utility model relates to the field of industrial waste gas treatment technology, and specifically to a waste gas treatment device. Background Technology

[0002] In industrial production processes such as powder coating, chemical processing, and painting, not only are high-concentration, fine-particle, and sticky process dusts generated, but also various volatile organic compounds and other organic waste gases are often produced. Therefore, waste gas treatment systems usually need to deal with particulate matter and organic pollutants separately.

[0003] Existing technologies face a dual challenge in treating dust-laden organic waste gas. First, in the dust pretreatment stage, traditional baghouse dust collectors suffer from incomplete cleaning, filter bag caking, high system resistance, and poor unloading sealing when handling fine, sticky dust, leading to unstable pretreatment results. Second, in the subsequent organic waste gas treatment stage, activated carbon adsorption is commonly used; however, the traditional fixed packed bed structure makes activated carbon replacement extremely cumbersome and labor-intensive, resulting in long shutdown and maintenance times and impacting continuous production.

[0004] Therefore, there is an urgent need in this field for a waste gas treatment device that integrates efficient dust removal and stable adsorption functions, has a compact structure, can synergistically treat dust-containing organic waste gas, and is easy to operate and maintain. Utility Model Content

[0005] In order to adapt to the comprehensive waste gas treatment of existing powder coating production, this utility model provides a waste gas treatment device.

[0006] The technical solution adopted by this utility model is as follows: a waste gas treatment device, comprising a dust filter, an activated carbon adsorption box and a fan connected in sequence; The dust filter includes: a tank body, consisting of a flange-connected top end cap, an upper cylinder, a lower cylinder, and a bottom end cap; a first air inlet, tangentially connected to the lower cylinder, for introducing exhaust gas; a filter element, disposed within the upper cylinder, for filtering dust-laden gas; a perforated plate, disposed between the top end cap and the upper cylinder, having multiple mounting holes for installing the filter element and separating the top end cap and the upper cylinder; a dust removal assembly, including a blowpipe and a control valve, the blowpipe being disposed within the top end cap for injecting high-pressure airflow into the filter element for dust removal; a discharge device, disposed at the bottom of the bottom end cap, for continuous or intermittent dust discharge and achieving airlock sealing; and a first air outlet, disposed at the top end cap, for discharging the dust-removed exhaust gas. The activated carbon adsorption box includes: a box body; a second air inlet connected to the first air outlet for introducing the dust-removed waste gas; several drawer-type carbon boxes filled with granular or honeycomb activated carbon, arranged in layers on the guide rails inside the box body; and a second air outlet connected to the fan for discharging clean gas.

[0007] Preferably, the filter element is a filter cartridge made of polyester or membrane-coated polyester filter material, which is vertically suspended in the upper cylinder.

[0008] Preferably, the perforated plate is a detachable structure, and the upper surface is provided with a first lifting lug.

[0009] Preferably, the dust removal assembly includes multiple blowpipes, each blowpipe having a nozzle aligned with the filter element.

[0010] Preferably, the control valve starts automatically or at a set time based on the system resistance.

[0011] Preferably, the bottom end cap is a conical end cap with an angle of 45° to 60°, forming a self-weight ash hopper.

[0012] Preferably, the unloading device is a rotary valve or a star-shaped unloader.

[0013] Preferably, the upper cylinder and the lower cylinder are respectively provided with an upper inspection port and a lower inspection port.

[0014] Preferably, the top end cap is provided with a second lifting lug.

[0015] This utility model has the following beneficial effects: 1. Synergistic treatment: The dust filter and activated carbon adsorption box are organically integrated. The efficient dust removal first creates good conditions for the subsequent adsorption, preventing the micropores of activated carbon from being blocked by dust and extending the service life of activated carbon. The subsequent adsorption thoroughly purifies the organic waste gas, and finally achieves the emission standard through the fan. The whole system has a compact structure, smooth process, high synergistic treatment efficiency, and low operation and maintenance costs. 2. Convenient maintenance: The tank adopts a modular design with the top head, upper cylinder, lower cylinder and bottom head connected by flanges, and combined with the upper and lower inspection ports, it is convenient for equipment installation, internal inspection and maintenance. The orifice plate adopts a detachable structure, and with the lifting lug design, the filter element can be disassembled and installed as a whole, which simplifies the filter cartridge replacement process and reduces maintenance costs and labor intensity. 3. Highly efficient dust removal: The first air inlet, set along the tangential direction, allows the dust-laden gas to enter in a swirling flow and be evenly distributed, avoiding localized erosion and wear on the filter element. The dust removal assembly adopts a multi-jet pipe structure and is automatically activated by the control valve according to the system resistance or timer, spraying high-pressure reverse airflow into the filter cartridge. This can efficiently shake off the highly adhesive dust cake, effectively prevent filter cartridge clogging, and ensure that the system operates stably in a low-resistance state for a long time. 4. Thorough collection: The self-weight ash hopper formed by the conical bottom head, combined with the rotary valve or star-shaped unloader at the bottom, can not only achieve smooth collection and continuous or intermittent discharge of dust, but also play a key role in airtight sealing, preventing the intake of external air and maintaining the necessary negative pressure condition inside the filter. 5. Excellent applicability: Optimized design for the high concentration, fine particles, and sticky dust generated during powder coating production, with the selection of suitable filter media and efficient dust removal methods, effectively solves the industry pain points of traditional bag dust collectors such as easy clogging, caking, and difficult dust removal. It is suitable for material handling scenarios that are sensitive to humidity or static electricity. 6. Convenient maintenance: The drawer-type carbon box design makes it easy to replace activated carbon. Operators do not need to enter the equipment. They can simply pull out the saturated carbon box and replace it with a new one, just like pulling out a drawer. The whole process is quick and safe, which greatly reduces downtime for maintenance and ensures the continuity of production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the dust filter in an embodiment of this utility model.

[0017] Figure 2 This is an exploded schematic diagram of the dust filter in an embodiment of this utility model.

[0018] Figure 3 This is a schematic diagram of the installation of the perforated plate and filter element in an embodiment of this utility model.

[0019] Figure 4 This is a schematic diagram of the installation of the top sealing head and the blow pipe in an embodiment of this utility model.

[0020] Figure 5 This is a schematic diagram of the activated carbon adsorption box in an embodiment of this utility model.

[0021] A-Dust filter, 1-Top end cap, 2-Upper cylinder, 3-Lower cylinder, 4-Bottom end cap, 5-First air inlet, 6-Filter element, 7-Perforated plate, 8-Blow-out pipe, 9-Unloading device, 10-First air outlet, 11-First lifting lug, 12-Nozzle, 13-Upper inspection port, 14-Lower inspection port, 15-Second lifting lug; B-Activated carbon adsorption box, 16-Box body, 17-Second air inlet, 18-Drawer-type carbon box, 19-Second air outlet. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0023] In the embodiments, such as Figures 1-4 As shown, a waste gas treatment device includes a dust filter A, an activated carbon adsorption box B, and a fan connected in sequence. The dust filter A includes: a tank body composed of a flanged top end cap 1, an upper cylinder 2, a lower cylinder 3, and a bottom end cap 4; a first inlet pipe 5, tangentially connected to the lower cylinder 3, for introducing waste gas; a filter element 6, disposed inside the upper cylinder 2, for filtering dust-laden gas; a perforated plate 7, disposed between the top end cap 1 and the upper cylinder 2, having multiple mounting holes for installing the filter element 6, and separating the top end cap 1 and the upper cylinder 2; a dust removal assembly including a blowpipe 8 and a control valve, the blowpipe 8 being disposed inside the top end cap 1 for spraying high-pressure airflow into the filter element 6 for dust removal; a discharge device 9, disposed at the bottom of the bottom end cap 4, for continuous or intermittent dust discharge and achieving airlock sealing; and a first outlet pipe 10, disposed at the top end cap 1, for discharging the dust-removed waste gas. The activated carbon adsorption box B includes: a box body 16; a second air inlet 17, which is connected to the first air outlet 10 for introducing the dust-removed waste gas; several drawer-type carbon boxes 18, which are filled with granular or honeycomb activated carbon and arranged in layers on the guide rails inside the box body 16; and a second air outlet 19, which is connected to a fan for discharging clean gas.

[0024] This embodiment integrates two-stage treatment functions by sequentially connecting dust filter A and activated carbon adsorption box B. Dust filter A first efficiently removes particulate matter from the dust-laden gas. Its first outlet 10 is directly connected to the second inlet 17 of activated carbon adsorption box B, ensuring that the dust-removed waste gas can directly enter the subsequent adsorption stage. This integrated design not only makes the system structure compact, but also effectively prevents dust from clogging the micropores of the activated carbon in the later stage through high-efficiency pre-dust removal, significantly extending the service life of the activated carbon. The entire system has high collaborative processing efficiency. The tank of dust filter A is connected by a top end cap 1, upper cylinder 2, lower cylinder 3, and bottom end cap 4 via flanges, resulting in a stable structure that is easy to manufacture and maintain. The first inlet 5 is connected tangentially to the lower cylinder 3, allowing the dust-laden gas to enter in a swirling flow, using centrifugal force to achieve pre-separation of coarse particles. The filter element 6 is located inside the upper cylinder 2 for fine filtration. The dust removal assembly sprays high-pressure airflow into the filter element 6 through a blowpipe 8 located inside the top head 1, effectively shaking off firmly adhered dust. The unloading device 9 at the bottom of the bottom head 4 enables continuous or intermittent dust discharge and airtight sealing, ensuring continuous and stable operation of the filtration process. The activated carbon adsorption box B uses several drawer-type carbon boxes 18 arranged in layers on guide rails inside the box body 16. This design allows the carbon boxes containing granular or honeycomb activated carbon to be easily pulled out and pushed in like drawers, greatly simplifying the activated carbon filling and replacement process. Operators do not need to enter the equipment, saving time and effort in maintenance and effectively shortening downtime. This embodiment integrates two major functions: efficient dust removal and convenient adsorption, solving the problems in existing technologies where incomplete dust treatment easily leads to activated carbon failure, and the inconvenience of activated carbon replacement affects continuous production.

[0025] In the embodiments, such as Figure 3 As shown, the filter element 6 is a filter cartridge made of polyester or membrane-coated polyester filter media, which is vertically suspended inside the upper cylinder 2. The vertical filter cartridge made of polyester or membrane-coated polyester filter media can effectively capture high concentrations of fine, sticky dust. The membrane treatment makes it easier to clean the dust, and the vertical suspension method is conducive to the shedding and collection of dust during cleaning.

[0026] In the embodiments, such as Figure 2-3 As shown, the perforated plate 7 has a detachable structure, and the upper surface is provided with a first lifting lug 11. The first lifting lug 11 facilitates the overall installation and disassembly of the filter element 6, making daily maintenance, filter cartridge replacement or cleaning work simpler and more efficient, reducing the difficulty and time consumption of maintenance work.

[0027] In the embodiments, such as Figure 4As shown, the dust removal assembly includes multiple blow pipes 8, each blow pipe 8 having a nozzle 12 aligned with the filter element 6. Through the arrangement of multiple blow pipes 8 and precisely aligned nozzles 12, multiple or all filter elements 6 can be cleaned efficiently and thoroughly at the same time, ensuring no dead corners in the cleaning and effectively restoring the system's ventilation capacity.

[0028] In this embodiment, the control valve starts automatically or at a set time based on system resistance. Automatic start-up based on system resistance (differential pressure) enables "on-demand cleaning," avoiding damage to the filter cartridge from excessive cleaning or excessive resistance from insufficient cleaning. Timed start-up provides a stable and reliable basic control mode, and both methods ensure that the system remains stable at the optimal operating resistance over the long term.

[0029] In the embodiments, such as Figures 1-2 As shown, the bottom end cap 4 is a conical end cap with an angle of 45° to 60°, forming a gravity-fed ash hopper. This angle range can make full use of the weight of the dust, allowing it to slide down naturally and smoothly, effectively preventing the dust from bridging or sticking to the wall and clogging in the ash hopper, and ensuring that the collected dust can be reliably transported to the unloading device 9.

[0030] In the embodiments, such as Figures 1-2 As shown, the unloading device 9 is a rotary valve or a star-shaped unloader. As a mature mechanical airlock unloading device, the rotary valve or star-shaped unloader can reliably isolate external air while continuously or intermittently discharging dust, maintaining the necessary negative pressure state inside the filter and ensuring that the filtration efficiency is not affected.

[0031] In the embodiments, such as Figure 1 As shown, the upper cylinder 2 and the lower cylinder 3 are respectively provided with an upper inspection port 13 and a lower inspection port 14. The upper inspection port 13 and the lower inspection port 14 provide convenient access for cleaning the inside of the equipment, checking the condition of the filter cartridge, and handling local faults, without the need for large-scale disassembly, thus improving the convenience and operability of equipment maintenance.

[0032] In the embodiments, such as Figure 1 As shown, the top end cap 1 is provided with a second lifting lug 15. The second lifting lug 15 provides a safe lifting point for the top end cap 1 and components such as the dust removal assembly installed on it, which facilitates the overall lifting of the top end cap 1 using lifting equipment during installation or major repairs, thereby improving the safety and efficiency of the operation.

[0033] Obviously, the above embodiments of this utility model are merely examples for illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Other obvious variations or modifications derived from the essential spirit of the present utility model still fall within the protection scope of the present utility model.

Claims

1. A waste gas treatment device, comprising a dust filter (A), an activated carbon adsorption box (B), and a fan connected in sequence, characterized in that, The dust filter (A) includes: The tank body consists of a top end cap (1), an upper cylinder (2), a lower cylinder (3), and a bottom end cap (4) connected by flanges; The first air inlet (5) is connected to the lower cylinder (3) in a tangential direction to introduce exhaust gas; A filter element (6) is disposed inside the upper cylinder (2) for filtering dust-laden gas; The perforated plate (7) is disposed between the top end cap (1) and the upper cylinder (2), and has a plurality of mounting holes for installing the filter element (6), and separates the top end cap (1) and the upper cylinder (2). The dust removal assembly includes a blowpipe (8) and a control valve. The blowpipe (8) is disposed inside the top end cap (1) and is used to spray high-pressure airflow into the filter element (6) for dust removal. The unloading device (9) is set at the bottom of the bottom head (4) for continuous or intermittent ash discharge and to achieve airlock sealing; The first air outlet (10) is located on the top end cap (1) and is used to discharge the exhaust gas after dust removal. The activated carbon adsorption box (B) includes: Box (16); The second air inlet (17) is connected to the first air outlet (10) and is used to introduce the exhaust gas after dust removal; Several drawer-type charcoal boxes (18) are filled with granular or honeycomb activated carbon and arranged in layers on the guide rails inside the box (16); The second air outlet (19) is connected to the fan and is used to discharge clean gas.

2. The waste gas treatment device according to claim 1, characterized in that, The filter element (6) is a filter cartridge made of polyester or coated polyester filter material, which is vertically suspended inside the upper cylinder (2).

3. The waste gas treatment device according to claim 1, characterized in that, The perforated plate (7) is a detachable structure, and the upper surface is provided with a first lifting lug (11).

4. The waste gas treatment device according to claim 1, characterized in that, The dust removal assembly includes multiple blow pipes (8), each blow pipe (8) having a nozzle (12) aligned with the filter element (6).

5. The waste gas treatment device according to claim 1, characterized in that, The control valve starts automatically or at set intervals based on system resistance.

6. The waste gas treatment device according to claim 1, characterized in that, The bottom end cap (4) is a conical end cap with a diameter of 45° to 60°, forming a self-weight ash hopper.

7. The waste gas treatment device according to claim 1, characterized in that, The unloading device (9) is a rotary valve or a star-shaped unloader.

8. The waste gas treatment device according to claim 1, characterized in that, The upper cylinder (2) and the lower cylinder (3) are respectively provided with an upper inspection port (13) and a lower inspection port (14).

9. The waste gas treatment device according to claim 1, characterized in that, The top cap (1) is provided with a second lifting lug (15).

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