Chemical resistant filter absorber

Abstract

The present application relates to the human defense engineering involves the drug ventilation system, disclose a kind of anti-chemical filter absorber, including filter main body, the air inlet end of filter main body is equipped with charge unit, the other side air outlet end is equipped with fine filter unit;Air inlet end outside and air inlet device are detachably connected, and the air inlet device includes air inlet diffusion shell body, and the cavity wall of air inlet diffusion shell body is fixed with the explosion-proof plate for protecting filter main body, and the free radical exciter is detachably installed on the explosion-proof plate, for generating free radical with the effect of killing and killing;Air outlet end outside and air outlet device are detachably connected.The anti-chemical filter absorber of the present application is modularized design, and can be modularized batch assembly production, each module is processed separately, and parts are produced in batches;Then batch assembly function module, air inlet device, filter main body, air outlet device;Finally, each unit module is assembled, which simplifies the installation step and improves the processing efficiency of the device.

Description

Technical Field

[0001] This invention belongs to the field of civil defense engineering technology and relates to a ventilation system for toxic substances in civil defense engineering, specifically a chemical protective filter absorber. Background Technology

[0002] Chemical defense filters are specialized equipment developed in accordance with the protection standards and requirements for chemical weapons in civil defense projects. They are mainly used in the ventilation systems of civil defense projects exposed to toxic substances. They can effectively filter harmful substances such as toxic fumes, toxic fog, bioaerosols, radioactive dust, and persistent toxic vapors from contaminated air, providing filtered clean air to personnel inside the project.

[0003] Currently used high-efficiency particulate air (HEPA) filters consist of a housing, an exhaust concentrator, a fine filter, and an intake diffuser. While they offer some capacity to treat polluted air, limitations in purification and manufacturing technologies result in certain shortcomings. The complex structure of HEPA filters necessitates the assembly of individual components during production and assembly, a cumbersome and time-consuming process that significantly reduces the manufacturing efficiency of chemical protective air filters. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the purpose of this invention is to provide a chemical protective filter absorber to solve the technical problems of complex structure, cumbersome production and assembly steps, long time consumption, low modularity, and inconvenient installation and replacement of the filter absorber.

[0005] This invention is achieved using the following technical solution: a chemical protective filter absorber, comprising a filter body, wherein a loading unit is installed in the air inlet of the filter body, and a fine filter unit is installed in the air outlet of the other side; the loading unit has a loading space in the center, and the loading space is filled with a filtering and purifying agent for removing gaseous toxic agents; the fine filter unit is filled with folded filter paper for intercepting carbon particles and residual aerosols; each functional module is independently assembled internally and then fixedly installed in the filter body;

[0006] The outer side of the air inlet end is detachably connected to the air inlet device. The air inlet device includes an air inlet diffuser shell. An explosion-proof plate for protecting the filter body is fixed inside the cavity wall of the air inlet diffuser shell. A free radical exciter is detachably installed on the explosion-proof plate for generating free radicals with a disinfection effect.

[0007] The outer side of the air outlet is detachably connected to the air outlet device. The air outlet device includes an air outlet diffuser housing, and the outer end of the air outlet diffuser housing is provided with a connecting seat for connecting to an external pipe.

[0008] Furthermore, the explosion-proof plate includes a portal-shaped base plate and a portal-shaped perforated plate. A ventilation channel is provided in the center of the bottom surface of the portal-shaped base plate, and the portal-shaped perforated plate is fixed to the base plate. The portal-shaped perforated plate has an arch-shaped structure, with evenly distributed circular mesh holes on its arch-shaped vertical sides to disperse and divert airflow. When this device encounters a sudden explosive impact at the air inlet, the explosion-proof plate, as a protective component, withstands the initial shock wave. When the impact pressure exceeds the critical load, the explosion-proof plate preferentially deforms, confining the explosive impact within the upstream cavity of the air inlet device, weakening the intensity of the shock wave, and preventing the high-intensity impact from being transmitted to the downstream filter body, thus avoiding the filter element (chemical loading unit and fine filtration unit) being shattered by the impact and the large-scale dispersion of the chemical agent.

[0009] Furthermore, the filter body includes a housing, on which multiple trays are installed in parallel, with gaps between adjacent trays forming exhaust channels. These multiple exhaust channels can divert and homogenize the airflow, reducing ventilation resistance.

[0010] Furthermore, a handle ring is symmetrically fixed to the outer surface of the housing, and a handle is installed through the handle ring.

[0011] Furthermore, the loading unit includes two layers of perforated plates and two layers of metal mesh fixed between the two layers of perforated plates, with the loading space between the two layers of metal mesh.

[0012] Furthermore, the filtration and purification agent filled in the loading space is activated carbon.

[0013] Furthermore, the fine filtration unit includes a fine filtration frame, in which multiple layers of diamond mesh are arranged for layering, and folded filter paper is filled between adjacent diamond meshes.

[0014] Furthermore, the folded filter paper is a glass fiber high-efficiency filter paper material.

[0015] The filtration principle of this invention:

[0016] The contaminated airflow enters the air intake device, where it is evenly distributed by the explosion-proof plate, while the free radical activator performs pre-biological disinfection. The airflow then enters the loading unit of the filter body, where the gaseous toxic agent is adsorbed and removed by the filter purification agent in the loading space. After that, it enters the fine filtration unit to intercept carbon particles and residual aerosols in the airflow to complete the purification. The purified clean air is then discharged from the air outlet device.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] 1. The chemical-resistant filter absorber of the present invention has a modular design, which enables modular mass assembly production. Each module is processed separately, and the parts are produced in batches. Then, they are assembled into functional modules, such as air inlet device, filter body, and air outlet device. Finally, the various unit modules are assembled, which simplifies the installation steps and improves the processing efficiency of the device.

[0019] 2. This invention adopts a modular installation and production method, and each module can be disassembled and replaced individually, making the maintenance and replacement of the device more convenient and further extending the service life of the device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the chemical-resistant filter absorber of the present invention.

[0022] Figure 2 This is a schematic diagram of the shell structure of the filter body.

[0023] Figure 3 This is a schematic diagram of the charge unit.

[0024] Figure 4 This is a schematic diagram of the fine filtration unit.

[0025] Figure 5 This is a schematic diagram of the air intake device.

[0026] Figure 6 This is a schematic diagram of the air outlet device.

[0027] In the diagram: 1-Air inlet device, 11-Air inlet diffuser housing, 12-Explosion-proof plate, 121-Gate-shaped base plate, 122-Gate-shaped perforated plate, 13-Free radical exciter, 2-Filter body, 21-Housing, 22-Support plate, 23-Exhaust duct, 24-Handle ring, 3-Air outlet device, 31-Air outlet diffuser housing, 32-Connecting seat, 4-Packing unit, 41-Packing space, 42-Perforated buckle plate, 43-Metal mesh, 5-Fine filtration unit, 51-Folded filter paper, 52-Fine filtration frame, 53-Rhombus mesh. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0030] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] refer to Figure 1-6 As shown, a chemical protective filter absorber includes a filter body 2, a chemical loading unit 4 installed in the air inlet end of the filter body 2, and a fine filter unit 5 installed in the air outlet end on the other side; the outer side of the air inlet end is detachably connected to the air inlet device 1, and the outer side of the air outlet end is detachably connected to the air outlet device 2.

[0032] like Figure 5 As shown, the air intake device 1 includes an air intake diffuser housing 11. An explosion-proof plate 12 for protecting the filter body 2 is fixed inside the cavity wall of the air intake diffuser housing 11. The explosion-proof plate 12 is welded from a portal-shaped base plate 121 and a portal-shaped perforated plate 122. The portal-shaped base plate 121 has U-shaped vertical edges at both ends. The end faces of the portal-shaped perforated plate 122 are welded to the two vertical edges of the portal-shaped base plate 121, and its bottom surface is in contact with the portal-shaped base plate 121. The four sides of the explosion-proof plate 12 are sealed and welded to the four inner sidewalls of the air intake diffuser housing 11. When this device encounters an instantaneous explosion impact at the air intake end, the explosion-proof plate 12 acts as a protective component, bearing the initial shock wave. When the impact pressure exceeds the critical load, the explosion-proof plate 12 deforms preferentially, confining the explosion impact within the upstream cavity of the air intake device 1, weakening the intensity of the shock wave, and preventing the high-intensity impact from being transmitted to the downstream filter body 2, thus preventing the filter element (powder loading unit 4 and fine filtration unit 5) from being shattered by the impact and the large-scale dispersion of the powder.

[0033] Specifically: the bottom surface of the portal-shaped base plate 121 has a ventilation channel in the middle to ensure the basic airflow; the portal-shaped perforated plate 122 has an arch-shaped structure, including a flat side and a vertical side. The vertical side has evenly distributed circular mesh holes, which are the mesh area. The mesh area and the flat area are spaced apart. The circular mesh holes can disperse and divert the airflow, eliminate the airflow vortex of the intake air, and allow the airflow to spread evenly to the downstream charging unit 4.

[0034] The perforated plate 122 serves as the assembly reference surface, on which a free radical activator 13 is detachably installed. This free radical generates a disinfecting free radical that oxidizes and inactivates bacteria, viruses, and spores in the airflow flowing into the air inlet device 1, achieving pre-disinfection of biological warfare agents. Before maintenance, the free radical activator 13 inside the air inlet device 1 is activated. The active free radicals diffuse and penetrate along the airflow into the filter layer of the charge unit 4, sterilizing and disinfecting the microorganisms retained on the surface of the filter material of the charge unit 4, significantly reducing the amount of live microorganisms on the surface of the filter element (charge unit 4 and fine filter unit 5). After sterilization, when disassembling the filter body 2, because a large number of live microorganisms on the surface of the charge unit 4 have been inactivated, the number of live pathogens carried by the dust during disassembly is significantly reduced, effectively reducing the outward diffusion and leakage of harmful organisms during disassembly.

[0035] Furthermore, during the processing of the perforated plate 122, a perforated area is punched out on the plate using a stamping machine, and then the plate is bent into an arc shape using a bending machine.

[0036] like Figure 2 As shown, the filter body 2 includes a housing 21. Multiple support plates 22 are installed in parallel on the housing 21 located at the air inlet end. Gaps are left between adjacent support plates 22 to form exhaust channels 23. Multiple exhaust channels 23 can divert and homogenize the airflow, reducing ventilation resistance.

[0037] After high-humidity air flows into the device, the airflow gradually cools down, and water vapor is released. It condenses on the inner wall of the filter absorber and the surface of the drug loading unit 4, which easily forms liquid water. The condensed liquid water droplets drip downwards and flow downwards along the exhaust channel 23 between the trays 22, which facilitates subsequent drainage. The gaps are continuously open, which not only ensures air circulation but also leaves a path for the water to flow downwards, preventing the water from soaking the drug.

[0038] Furthermore, a handle ring 24 is symmetrically welded to the outer surface of the housing 21, and a handle is installed through the handle ring.

[0039] like Figure 3 As shown, the loading unit 4 includes two layers of perforated plates 42 and two layers of metal mesh 43 fixed between the two layers of perforated plates 42. The two layers of metal mesh 43 enclose the loading space 41, which is filled with activated carbon as a filter and purification agent to remove gaseous toxic agents from the airflow.

[0040] The porous buckle plate 42 can support and fix the metal mesh 43, uniformly distribute the airflow, and prevent the filter and purification agent from escaping. The two layers of metal mesh 43 rely on the fine mesh surface to constrain the activated carbon particles and prevent the filter and purification agent from leaking out. The two work together to keep the structure of the drug loading unit 4 stable, reduce ventilation resistance, and ensure the stable purification capacity of the filter absorber.

[0041] like Figure 4 As shown, the fine filtration unit 5 includes a fine filter frame 52, which is attached to the inner wall of the housing 21. Multiple layers of diamond mesh 53 are arranged in the fine filter frame 52 for layering. Folded filter paper 51 is filled between adjacent diamond meshes 53 to intercept carbon particles and residual aerosols. The folded filter paper 51 is a glass fiber high-efficiency filter paper material.

[0042] Specifically: the fine filter frame 52 is welded together from four side plates connected end to end. Figure 4 (The internal structure is shown in the middle; the two side panels are not shown.) The diamond mesh 53 is a metal wire mesh with diamond-shaped openings. Its four sides overlap with the inner wall of the fine filter frame 52, and the overlaps are spot-welded to form a fixation. The folded filter paper 51 is located in the interlayer between two adjacent layers of diamond mesh 53. The folded filter paper 51 is rectangular, with a length of 580mm, a width of 550mm, a fold height of 90mm, a fold spacing of 3mm, and a fold number of 110. The folded filter paper 51 is glued and cured around its contact with the fine filter frame 52.

[0043] like Figure 1 As shown, during the assembly of the entire device, the multi-drug assembly unit 5 is pre-welded into the air inlet end of the housing 21, and the fine filter unit 5 is welded and installed into the air outlet end of the housing 21. Finally, the air outlet diffuser housing 31 is connected to the air outlet end of the housing 21, and the air inlet diffuser housing 11 is connected to the air inlet end of the housing 21.

[0044] like Figure 6 As shown, the air outlet device 3 includes an air outlet diffuser housing 31, which is a four-sided pyramidal structure that diffuses the air outlet; the connecting seat 32 is a square straight cylinder, the inner end of which is welded and fixed to the narrow end of the air outlet diffuser housing 31 for connection with external pipes.

[0045] The filtration principle of the chemical-resistant filter absorber of this invention is as follows:

[0046] The polluted airflow enters the air inlet device 1, and the airflow is evenly distributed by the perforated plate 122. At the same time, the free radical exciter 13 performs biological pre-disinfection. Then it enters the drug loading unit 4 of the filter body 2, where the activated carbon in the drug loading space 41 adsorbs and removes the gaseous toxic agent. After that, it enters the fine filtration unit 5 to intercept carbon particles and residual aerosols in the airflow to complete the purification. The purified clean air is discharged by the air outlet device 3.

[0047] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered within the protection scope of the claims.

Claims

1. A chemical-resistant filter absorber, comprising a filter body (2), characterized in that: The filter body (2) has a loading unit (4) installed in the air inlet and a fine filter unit (5) installed in the air outlet on the other side; the loading unit (4) has a loading space (41) in the center, which is filled with a filter purification agent for removing gaseous toxic agents; the fine filter unit (5) is filled with folded filter paper (51) for intercepting carbon particles and residual aerosols. The outer side of the air inlet end is detachably connected to the air inlet device (1). The air inlet device (1) includes an air inlet diffuser housing (11). An explosion-proof plate (12) for protecting the filter body (2) is fixed inside the cavity wall of the air inlet diffuser housing (11). A free radical exciter (13) is detachably installed on the explosion-proof plate (12) for generating free radicals with a disinfection effect. The outer side of the air outlet is detachably connected to the air outlet device (2). The air outlet device (3) includes an air outlet diffuser housing (31), and the outer end of the air outlet diffuser housing (31) is provided with a connecting seat (32) for connecting to an external pipe.

2. The chemical-resistant filter absorber according to claim 1, characterized in that: The explosion-proof plate (12) includes a door-shaped base plate (121) and a door-shaped perforated plate (122). A ventilation channel is provided in the middle of the bottom surface of the door-shaped base plate (121). The door-shaped perforated plate (122) is fixed on the door-shaped base plate (121). The door-shaped perforated plate (122) has an arch-shaped structure. Circular mesh holes are evenly distributed on the vertical side of the arch shape to disperse and divert the airflow.

3. The chemical-resistant filter absorber according to claim 1, characterized in that: The filter body (2) includes a housing (21), and multiple trays (22) are installed in parallel on the housing (21) located at the air inlet end. A gap is left between adjacent trays (22) to form an exhaust channel (23).

4. The chemical-resistant filter absorber according to claim 3, characterized in that: The outer surface of the housing (21) is symmetrically fixed with handle rings (24).

5. The chemical-resistant filter absorber according to claim 1, characterized in that: The loading unit (4) includes two layers of perforated plates (42) and two layers of metal mesh (43) fixed between the two layers of perforated plates (42), with the loading space (41) between the two layers of metal mesh (43).

6. The chemical-resistant filter absorber according to claim 5, characterized in that: The filter and purification agent filled in the loading space (41) is activated carbon.

7. The chemical-resistant filter absorber according to claim 1, characterized in that: The fine filtration unit (5) includes a fine filtration frame (52), in which multiple layers of diamond mesh (53) are arranged for layering, and folded filter paper (51) is filled between adjacent diamond meshes (53).

8. The chemical-resistant filter absorber according to claim 7, characterized in that: The folded filter paper (51) is a glass fiber high-efficiency filter paper material.

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