Filter device before waste gas detection

Abstract

The utility model discloses a filter device before waste gas detection, and belongs to the technical field of waste gas filtration. A filter device before waste gas detection comprises a sealing cavity, a connecting port is formed in one end of the sealing cavity, a waste gas outlet is formed in the other end of the sealing cavity, fine filter cloth is arranged in the sealing cavity, coarse filter cloth is arranged in the fine filter cloth, a buffer plate is arranged at one end of the coarse filter cloth, and a filter screen is arranged at the other end of the buffer plate. A first connecting plate is arranged at the other end of the coarse filter cloth, a reinforcing rib is arranged on one side of the first connecting plate, and a waste gas inlet is formed in the other side of the first connecting plate. In order to solve the problems that a waste gas filter is insufficient in filtering capacity and cannot reduce the content of aerosol in waste gas, fine filtering cloth is arranged in a sealing cavity, coarse filtering cloth is arranged in the fine filtering cloth, when waste gas passes through the fine filtering cloth, the waste gas firstly passes through the coarse filtering cloth, then passes through the fine filtering cloth, and the purified waste gas basically meets the subsequent detection requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust gas filters, in particular to an exhaust gas pre-detection filter device. Background Art

[0002] The content of exhaust gas detection mainly includes the composition and concentration of exhaust gas, the quantitative data of exhaust gas emission and the monitoring of emission conditions. In order to prevent particulate matter from polluting the analyzer, a fine filter should be set before the gas sample enters the analyzer; the material of the filter material should not adsorb and react with gaseous pollutants, and the filter should be able to filter at least (0.5-1) μm particle size.

[0003] Chinese patent publication number CN218280979U discloses an exhaust gas filter, which optimizes the structure so that the collection box and the shell can be disassembled, thereby facilitating the unified dumping of particulate impurities collected in the collection box.

[0004] In the above patent, the exhaust gas filter has insufficient filtering capacity and cannot reduce the aerosol content in the exhaust gas; therefore, it does not meet the existing needs, and a pre-exhaust gas detection filter device is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a pre-filter device for exhaust gas detection, by arranging a fine filter cloth inside a sealed cavity, and arranging a coarse filter cloth inside the fine filter cloth. When exhaust gas passes through, the exhaust gas first passes through the coarse filter cloth, and the coarse filter cloth filters out particles with a particle size of 1 μm and above in the exhaust gas. The exhaust gas then passes through the fine filter cloth, and the fine filter cloth filters out particles with a particle size of 0.5 to 1 μm in the exhaust gas. The purified exhaust gas basically meets the subsequent detection requirements, and can solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pre-filter device for exhaust gas detection, comprising a sealed cavity, a connecting port is provided at one end of the sealed cavity, an exhaust gas outlet is provided at the other end of the sealed cavity, a fine filter cloth is provided inside the sealed cavity, a second connecting plate is provided at one end of the fine filter cloth, a limiting plate is provided at the other end of the fine filter cloth, a coarse filter cloth is provided inside the fine filter cloth, a buffer plate is provided at one end of the coarse filter cloth, a first connecting plate is provided at the other end of the coarse filter cloth, a reinforcing rib is provided on one side of the first connecting plate, and an exhaust gas inlet is provided on the other side of the first connecting plate.

[0007] Preferably, the sealed cavity is a cylindrical structure with a hollow interior, and a vacuum heat insulation layer is provided on the outer circumferential surface of the sealed cavity.

[0008] Preferably, the fine filter cloth is a cylindrical structure surrounded by folded fan surfaces, and is made of glass fiber needle felt. A bracket is provided inside the fine filter cloth, one end of the bracket is welded to the limiting plate, and the other end of the bracket is welded to the second connecting plate.

[0009] Preferably, the coarse filter cloth is a cylindrical structure surrounded by folded fan surfaces, and is made of synthetic fibers. A bracket is provided inside the coarse filter cloth, one end of the bracket is welded to the buffer plate, and the other end of the bracket is welded to the first connecting plate.

[0010] Preferably, one end of the reinforcing rib is welded to the buffer plate, and the other end of the reinforcing rib is welded to the first connecting plate.

[0011] Preferably, the exhaust gas inlet is threadedly connected to the connecting port, and the second connecting plate is connected to the sealing cavity by screws.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with a fine filter cloth inside the sealed cavity, and a coarse filter cloth inside the fine filter cloth. When exhaust gas passes through, the exhaust gas first passes through the coarse filter cloth, and the coarse filter cloth filters out particles with a particle size of 1 μm and above in the exhaust gas. The exhaust gas then passes through the fine filter cloth, and the fine filter cloth filters out particles with a particle size of 0.5 to 1 μm in the exhaust gas. The filtered exhaust gas can meet subsequent detection requirements.

[0014] 2. The utility model optimizes the structure of the filter cloth so that the filter cloth becomes a cylindrical structure surrounded by folded fan surfaces, thereby expanding the contact area between the filter cloth and the exhaust gas and improving the filtering capacity of the filter cloth.

[0015] 3. The utility model provides a vacuum insulation layer on the outer cylindrical surface of the sealing cavity. The exhaust gas contains a large amount of heat energy. When the exhaust gas enters the sealing cavity, the insulation layer can reduce the heat dissipation inside the sealing cavity, thereby reducing the risk of scalding of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall front view of the utility model;

[0017] Figure 2 It is an overall cross-sectional view of the utility model;

[0018] Figure 3 This is a schematic diagram of the coarse grid structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the fine grid structure of the utility model.

[0020] In the figure: 1, sealing chamber; 101, exhaust gas outlet; 102, connecting port; 2, coarse filter cloth; 201, reinforcing ribs; 202, buffer plate; 203, exhaust gas inlet; 204, first connecting plate; 3, fine filter cloth; 301, second connecting plate; 302, limit plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] To solve the problem that the exhaust gas filter has insufficient filtering capacity and cannot reduce the aerosol content in the exhaust gas, please refer to Figure 1-4 The utility model provides an embodiment: a pre-filter device for exhaust gas detection, including a sealed cavity 1, which is a cylindrical structure with a hollow interior. A vacuum insulation layer is arranged on the outer surface of the sealed cavity 1. The exhaust gas contains a large amount of heat energy. When the exhaust gas enters the sealed cavity 1, the insulation layer can reduce the dissipation of heat inside the sealed cavity 1, thereby further reducing the risk of burns to the staff.

[0023] A connecting port 102 is provided at one end of the sealed cavity 1, and an exhaust gas outlet 101 is provided at the other end of the sealed cavity 1. A fine filter cloth 3 is provided inside the sealed cavity 1, a second connecting plate 301 is provided at one end of the fine filter cloth 3, a limiting plate 302 is provided at the other end of the fine filter cloth 3, a coarse filter cloth 2 is provided inside the fine filter cloth 3, a buffer plate 202 is provided at one end of the coarse filter cloth 2, and a first connecting plate 204 is provided at the other end of the coarse filter cloth 2. An exhaust gas inlet 203 is provided on one side of the first connecting plate 204, and a reinforcing rib 201 is provided on the other side of the first connecting plate 204. One end of the reinforcing rib 201 is welded to the buffer plate 202, and the other end of the reinforcing rib 201 is welded to the first connecting plate 204. When the exhaust gas enters the interior of the coarse filter cloth 2, the exhaust gas carries a large amount of kinetic energy. If it directly contacts the coarse filter cloth 2, the coarse filter cloth 2 may be damaged. The buffer plate 202 can absorb the kinetic energy contained in the exhaust gas, and the reinforcing rib 201 further enhances the ability of the buffer plate 202 to absorb the kinetic energy in the exhaust gas.

[0024] The fine filter cloth 3 is a cylindrical structure surrounded by a folded fan surface, and is made of glass fiber needle felt. A bracket is arranged inside the fine filter cloth 3, one end of the bracket is welded to the limit plate 302, and the other end of the bracket is welded to the second connecting plate 301; the coarse filter cloth 2 is a cylindrical structure surrounded by a folded fan surface, and is made of synthetic fiber. A bracket is arranged inside the coarse filter cloth 2, one end of the bracket is welded to the buffer plate 202, and the other end of the bracket is welded to the first connecting plate 204, which optimizes the structure of the coarse filter cloth 2 and the fine filter cloth 3, expands the contact area between the coarse filter cloth 2 and the fine filter cloth 3 and the exhaust gas, and further improves the filtering capacity of the coarse filter cloth 2 and the fine filter cloth 3.

[0025] Working principle: a fine filter cloth 3 is arranged inside the sealed cavity 1, and a coarse filter cloth 2 is arranged inside the fine filter cloth 3. When exhaust gas passes through, the exhaust gas first passes through the coarse filter cloth 2, and the coarse filter cloth 2 filters out particles with a particle size of 1μm and above in the exhaust gas. The exhaust gas then passes through the fine filter cloth 3, and the fine filter cloth 3 filters out particles with a particle size of 0.5-1μm in the exhaust gas. The purified exhaust gas basically meets the subsequent detection requirements.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An exhaust gas detection pre-filter device, comprising a sealed chamber (1), characterized in that; A connection port (102) is provided at one end of the sealed cavity (1), an exhaust gas outlet (101) is provided at the other end of the sealed cavity (1), a fine filter cloth (3) is provided inside the sealed cavity (1), a second connection plate (301) is provided at one end of the fine filter cloth (3), a limit plate (302) is provided at the other end of the fine filter cloth (3), a coarse filter cloth (2) is provided inside the fine filter cloth (3), a buffer plate (202) is provided at one end of the coarse filter cloth (2), a first connection plate (204) is provided at the other end of the coarse filter cloth (2), a reinforcing rib (201) is provided on one side of the first connection plate (204), and an exhaust gas inlet (203) is provided on the other side of the first connection plate (204).

2. The exhaust gas pre-detection filter device according to claim 1, characterized in that: The sealed cavity (1) is a cylindrical structure with a hollow interior, and a vacuum heat insulation layer is provided on the outer circumferential surface of the sealed cavity (1).

3. The exhaust gas pre-detection filter device according to claim 1, characterized in that: The fine filter cloth (3) is a cylindrical structure surrounded by a folded fan surface and is made of glass fiber needle felt. A bracket is provided inside the fine filter cloth (3), one end of the bracket is welded to the limiting plate (302), and the other end of the bracket is welded to the second connecting plate (301).

4. The exhaust gas pre-detection filter device according to claim 1, characterized in that: The coarse filter cloth (2) is a cylindrical structure surrounded by a folded fan surface and is made of synthetic fibers. A bracket is provided inside the coarse filter cloth (2), one end of the bracket is welded to the buffer plate (202), and the other end of the bracket is welded to the first connecting plate (204).

5. The exhaust gas pre-detection filter device according to claim 1, characterized in that: One end of the reinforcing rib (201) is welded to the buffer plate (202), and the other end of the reinforcing rib (201) is welded to the first connecting plate (204).

6. The exhaust gas pre-detection filter device according to claim 1, characterized in that: The exhaust gas inlet (203) is threadedly connected to the connection port (102), and the second connection plate (301) is connected to the sealing chamber (1) via screws.

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