An activated carbon filter device for exhaust gas purification

Abstract

The utility model relates to waste gas treatment technical field especially relates to a waste gas purification is with activated carbon filter device, its technical scheme includes: main shell and vice shell, the air inlet of vice shell is screwed on the air outlet of main shell, the inside of vice shell is provided with filter core unit, the filter core unit is by each six prism cylinder array constitutes, the inside of six prism cylinder and between adjacent six prism cylinder fills with activated carbon, the inside of main shell is fixed with pressure reducing assembly through mounting bracket, and the pressure reducing assembly is used for stabilizing the gas pressure of filter core unit. The utility model discloses through linkage type pressure reducing assembly, has realized to filter core's automatic, passive pressure protection, has prolonged activated carbon filter core's service life significantly, has improved system operation's security and stability, and its modular design has also greatly facilitated maintenance work.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to an activated carbon filtration device for waste gas purification. Background Technology

[0002] Waste gases generated during industrial production often contain pollutants such as volatile organic compounds, which must be purified before being released. Activated carbon adsorption is widely used in waste gas purification due to its high efficiency and economy.

[0003] Traditional activated carbon filtration devices typically employ a simple tank structure filled with granular activated carbon. When the flow rate or pressure of exhaust gas fluctuates, the high-speed airflow directly impacts the activated carbon filter layer, causing the activated carbon particles to rub against each other and pulverize. This not only shortens the lifespan of the filter element but also increases system resistance, affecting purification efficiency. Furthermore, existing filtration devices lack effective buffering and pressure stabilization mechanisms when facing pressure surges, easily leading to insufficient filtration or even damage to the filter element structure. Therefore, developing an activated carbon filtration device that can adaptively stabilize inlet air pressure, protect the filter element, and extend its lifespan is of paramount importance.

[0004] Therefore, we propose an activated carbon filtration device for waste gas purification to solve the existing problems. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing an activated carbon filtration device for waste gas purification.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an activated carbon filter device for purifying waste gas, comprising a main shell and a secondary shell, wherein the air inlet of the secondary shell is threadedly installed on the air outlet of the main shell, and a filter element unit is provided inside the secondary shell, wherein the filter element unit is composed of an array of hexagonal cylinders, and activated carbon is filled inside the hexagonal cylinders and between adjacent hexagonal cylinders. A pressure-reducing component is fixedly installed inside the main housing via a mounting bracket. The pressure-reducing component is used to stabilize the gas pressure entering the filter element unit.

[0007] Preferably, the decompression assembly includes a decompression chamber and an airbag. The airbag is fixedly disposed in the decompression chamber. Both ends of the airbag are hardened. A plug is slidably disposed at the opening of the front end of the airbag. A front panel is fixedly disposed on the plug. The front panel is directly opposite the air inlet of the main shell.

[0008] Preferably, a pressure relief valve is fixedly provided at the tail end of the airbag, and the pressure relief valve is directly opposite the air inlet of the sub-shell.

[0009] Preferably, an inner spring is provided between the inner wall of the airbag's head end and the front panel. Under the elastic thrust of the inner spring, the plug is pressed tightly against the inner wall of the airbag's head end, thereby sealing the opening of the airbag's head end.

[0010] Preferably, mesh plates are symmetrically fixed at both ends of the filter element unit.

[0011] Preferably, a flange is fixedly provided on the outer peripheral surface of the main shell, and mounting holes are provided on the flange at equal intervals.

[0012] Preferably, a sealing ring is provided at the connection position between the outer peripheral surface of the filter element unit and the sub-shell.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention features a unique pressure-reducing component inside the main housing. This device effectively addresses fluctuations in intake pressure. When the air pressure is normal, exhaust gas is directly filtered through the filter element unit. When the air pressure is too high, the pressure-reducing component is activated, storing excess gas through the expansion of the air bladder and releasing it smoothly through the pressure relief valve. This ensures that the airflow pressure entering the filter element unit remains stable. This process effectively avoids the direct impact of high-pressure airflow on the activated carbon filter element, prevents the activated carbon from pulverizing, and greatly extends the service life of the filter element. The pressure reducing component adopts a linkage design of front panel-plug block-inner spring, which is simple and efficient. The cross-shaped air port on the front panel ensures that the exhaust gas pressure can be accurately applied to the plug block. Under the initial preload of the internal spring, the device can automatically determine whether the gas pressure exceeds the standard and decide whether to start the pressure reducing mode. The whole process does not require external energy and control components, realizing fully passive pressure management with high reliability and economy. The filter element unit is composed of multiple hexagonal cylindrical arrays, and activated carbon is filled inside and between them. This honeycomb structure not only provides a huge specific surface area and uniform airflow channels, improving adsorption efficiency, but also has a structural strength far superior to the traditional loose filling method, effectively resisting airflow impact, preventing channeling phenomenon, and ensuring the stability of purification effect. The main shell and the secondary shell are connected by threads. The filter element unit is independently set in the secondary shell. When the filter element needs to be replaced or maintained, simply unscrew the secondary shell. The operation is very simple, which greatly reduces maintenance costs and time. At the same time, the flange setting also facilitates the quick installation and fixing of the whole set of equipment in the pipeline system. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present utility model Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 This is a schematic diagram of the filter element unit structure of this utility model; Figure 4 This is a schematic diagram of the pressure-reducing component of this utility model.

[0015] Figure label: 1. Main shell; 2. Secondary shell; 3. Flange; 4. Mounting hole; 5. Pressure reducing assembly; 501. Pressure reducing chamber; 502. Airbag; 503. Front panel; 504. Inner spring; 505. Plug; 506. Pressure relief valve; 6. Mesh plate; 7. Filter element unit; 8. Mounting bracket; 9. Hexagonal cylinder. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1 like Figures 1-4 As shown, the activated carbon filter device for purifying exhaust gas proposed in this utility model includes a main shell 1 and a secondary shell 2. The main shell 1 is a cylindrical structure made of corrosion-resistant steel or engineering plastic. An annular flange 3 is welded and fixed on its outer side wall. A series of mounting holes 4 are evenly opened on the flange 3 along the circumference. The entire device can be firmly installed in the exhaust gas pipeline system through these mounting holes 4 and by using bolts.

[0018] The interior of the main shell 1 contains its core functional unit: the pressure relief component 5. This component is fixed in the inner cavity of the main shell 1 by a radial mounting bracket 8. The exterior of the pressure relief component 5 is a rigid pressure relief chamber 501, inside which an airbag 502 made of highly elastic and aging-resistant rubber material is fixedly installed. In order to ensure the stability of the end shape of the airbag 502 during repeated expansion and contraction, its front end (air inlet end) and tail end (air outlet end) are both specially hardened.

[0019] At the opening of the airbag 502, a plug 505 is precisely slidably fitted. The plug 505 is fixedly connected to a front panel 503 via a central rod. The plane of the front panel 503 faces the air inlet of the main shell 1. A cross-shaped air guide port is provided in the central area of ​​the front panel 503. Its function is to concentrate the exhaust gas entering the main shell 1 and guide it to the back of the plug 505. An inner spring 504 is installed between the inner wall of the airbag 502 and the front panel 503. Under the pre-tightening force of the inner spring 504, the plug 505 is normally pushed and tightly sealed to block the opening of the airbag 502, forming a seal.

[0020] At the tail end of the airbag 502, a pressure relief valve 506 is fixedly installed. The opening pressure of the pressure relief valve 506 is preset, and its outlet end is directly connected to the air inlet of the sub-shell 2.

[0021] Example 2 like Figures 1-4 As shown, the activated carbon filter device for purifying exhaust gas proposed in this utility model, compared with Embodiment 1, further includes: a secondary shell 2 whose air inlet is connected to the air outlet of the main shell 1 through a precision thread. This design allows the secondary shell 2 to be easily unscrewed for filter element replacement.

[0022] The core of the sub-shell 2 is the filter element unit 7. This unit is composed of a large number of hollow hexagonal tubes 9 bonded together in a tight honeycomb array. This hexagonal structure provides the maximum specific surface area while also having excellent mechanical strength. The internal cavity of each hexagonal tube 9 and the gaps between all adjacent hexagonal tubes 9 are tightly filled with granular activated carbon with high adsorption performance, thus forming a huge and structurally stable activated carbon adsorbent.

[0023] To protect the filter element structure and prevent activated carbon leakage, metal mesh plates 6 are fixed to the air inlet and outlet ends of the filter element unit 7 by means of pressure rings or adhesive bonding. In addition, an annular sealing ring is embedded between the outer peripheral surface of the filter element unit 7 and the inner wall of the sub-shell 2. This sealing ring effectively prevents unfiltered exhaust gas from "short-circuiting" through the gaps, ensuring that all exhaust gas must flow through the activated carbon layer, thereby guaranteeing purification efficiency.

[0024] The working principle of this utility model is as follows: Under normal operating conditions, exhaust gas enters through the air inlet of the main housing 1. At this time, the pressure of the exhaust gas acting on the front panel 503 and the plug 505 is insufficient to overcome the preload of the inner spring 504. Therefore, the plug 505 remains in a blocking state on the inlet of the airbag 502, and the exhaust gas cannot enter the airbag 502. Instead, it bypasses the surrounding channels of the pressure reducing assembly 5 and directly enters the secondary housing 2. Then, it passes evenly through the mesh plate 6. When it flows through the filter element unit 7, the pollutants therein are fully adsorbed by the activated carbon, and the purified gas is discharged from the air outlet of the secondary housing 2.

[0025] When the exhaust gas source fluctuates and the intake pressure suddenly increases, the high-pressure airflow concentrates on the plug 505 through the cross-shaped air inlet of the front panel 503, generating a powerful thrust sufficient to overcome the preload of the inner spring 504. This thrust pushes the plug 505 inward, thereby opening the inlet of the airbag 502. At this time, some of the high-pressure exhaust gas rushes into the airbag 502, causing it to expand and deform. This process acts like an "air reservoir," instantly absorbing and storing excess gas and pressure energy, preventing the high-pressure airflow from directly impacting the rear filter element 7, and effectively preventing the activated carbon particles from being pulverized due to high-speed airflow friction.

[0026] As exhaust gas continues to enter, the pressure inside the airbag 502 continuously increases. When the internal pressure reaches the preset opening pressure of the pressure relief valve 506, the valve disc of the pressure relief valve 506 is opened, allowing the exhaust gas stored in the airbag 502 to be released smoothly and controllably, entering the secondary shell 2 and undergoing the normal filtration process. When the intake pressure returns to normal, the force acting on the plug 505 decreases, and under the restoring force of the inner spring 504, the plug 505 slides again and seals the inlet of the airbag 502, and the device returns to the direct-pass filtration state.

[0027] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An activated carbon filter device for purifying waste gas, comprising a main shell (1) and a secondary shell (2), characterized in that: The air inlet of the sub-shell (2) is threaded onto the air outlet of the main shell (1). The interior of the sub-shell (2) is provided with a filter element unit (7). The filter element unit (7) is composed of an array of hexagonal cylinders (9). The interior of the hexagonal cylinders (9) and the spaces between adjacent hexagonal cylinders (9) are filled with activated carbon. The pressure reducing assembly (5) is fixedly installed inside the main housing (1) by a mounting bracket (8). The pressure reducing assembly (5) is used to stabilize the gas pressure entering the filter element unit (7).

2. The activated carbon filter device for purifying waste gas according to claim 1, characterized in that: The pressure relief assembly (5) includes a pressure relief chamber (501) and an airbag (502). The airbag (502) is fixedly installed in the pressure relief chamber (501). The airbag (502) is hardened at both ends. A plug (505) is slidably installed at the opening of the front end of the airbag (502). A front panel (503) is fixedly installed on the plug (505). The front panel (503) is directly opposite the air inlet of the main shell (1).

3. The activated carbon filter device for purifying waste gas according to claim 2, characterized in that: The airbag (502) is fixedly provided with a pressure relief valve (506) at its tail end, and the pressure relief valve (506) is directly opposite the air inlet of the sub-shell (2).

4. The activated carbon filter device for purifying waste gas according to claim 2, characterized in that: An inner spring (504) is provided between the inner wall of the first end of the airbag (502) and the front panel (503). Under the elastic thrust of the inner spring (504), the plug (505) is pressed tightly against the inner wall of the first end of the airbag (502) to seal the opening at the first end of the airbag (502).

5. The activated carbon filter device for waste gas purification according to claim 1, characterized in that: The filter element unit (7) is symmetrically fixed with mesh plates (6) at both ends.

6. The activated carbon filter device for purifying waste gas according to claim 1, characterized in that: A flange (3) is fixedly provided on the outer circumferential surface of the main shell (1), and mounting holes (4) are provided at equal intervals on the flange (3).

7. The activated carbon filter device for waste gas purification according to claim 1, characterized in that: A sealing ring is provided at the connection position between the outer peripheral surface of the filter element unit (7) and the sub-shell (2).

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