An exhaust gas adsorption box

Abstract

The present invention relates to an exhaust gas adsorption box, which comprises a box body. An adsorption material is filled in the middle section of the box body. A first chamber and a second chamber are respectively formed between the adsorption material and the box body. The adsorption material has a plurality of partitions that divide the adsorption material into multiple regions. A first baffle and a second baffle hinged to the inner wall of the box body are provided in the first chamber. A third baffle and a fourth baffle hinged to the inner wall of the box body are provided in the second chamber. A first connection flange is provided at the first chamber, and a second connection flange is provided at the second chamber. The first connection flange and the second connection flange are arranged on opposite side walls of the box body. In the exhaust gas adsorption box of the present invention, by changing the cross-sectional area facing the wind during adsorption and desorption of the adsorption bed, the flow velocity change caused by the flow rate change during adsorption and desorption is made smaller, so that the gas can be evenly distributed whether during adsorption or desorption.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and particularly relates to a waste gas adsorption box. Background Art

[0002] For large-volume and low-concentration VOCs waste gas, the current mainstream treatment process is adsorption concentration + thermal oxidation (or catalysis). Among them, adsorption concentration is further divided into rotary wheel adsorption concentration, fixed bed adsorption concentration, moving bed adsorption concentration, etc. For a large number of small and medium-sized enterprises, due to cost considerations, the use of rotary wheel concentration and moving bed concentration is very rare, and the vast majority of enterprises use fixed bed concentration. After the fixed bed concentration is saturated after a certain period of time (generally several days or even several weeks), desorption and regeneration are required. The desorption uses hot gas desorption (which can be steam, hot nitrogen, hot air, etc.). Considering the practical frequency and reducing the investment cost, the hot gas desorption gas volume is much smaller than the adsorption gas volume, generally less than one-tenth of the adsorption gas volume.

[0003] To ensure the adsorption effect, the fixed bed adsorption box is designed according to the adsorption gas volume. The gas is evenly distributed on the windward surface of the adsorption bed, and the gas passes through the adsorption bed layer evenly. During desorption, since the hot gas flow rate is less than one-tenth of the adsorption gas volume and the resistance is low, the desorption hot gas cannot be evenly distributed. The flow rate is high near the air inlet and low far from the air inlet, resulting in poor desorption effect of the adsorption bed, incomplete regeneration of the adsorption bed, reduced adsorption capacity during the next adsorption, and exceeding the emission standard after long-term use. Summary of the Invention

[0004] The purpose of the present invention is to provide an adsorption box to solve the problems in the background art.

[0005] To achieve the above purpose, the present invention provides an adsorption box, including a box body. The middle section of the box body is filled with an adsorption material. There are a first chamber and a second chamber between the adsorption material and the box body respectively. The adsorption material has a plurality of partitions dividing the adsorption material into a plurality of regions. In the first chamber, a first baffle and a second baffle hinged to the inner wall of the box body are provided. In the second chamber, a third baffle and a fourth baffle hinged to the inner wall of the box body are provided. A first connection flange is provided at the first chamber, and a second connection flange is provided at the second chamber. And the first connection flange and the second connection flange are arranged on opposite side walls of the box body.

[0006] According to one aspect of the present invention, the adsorption material is provided with a first partition, a second partition, a third partition, and a fourth partition at equal intervals, dividing the adsorption material into a first region, a second region, a third region, a fourth region, and a fifth region.

[0007] According to one aspect of the present invention, the first baffle, the second baffle, the third baffle, and the fourth baffle all have two states: open and closed.

[0008] According to one aspect of the present invention, when the first baffle, the second baffle, the third baffle and the fourth baffle are in the closed state, the first baffle is located on the right side of the second partition and overlaps with the second partition, the second baffle is located on the right side of the fourth partition and overlaps with the fourth partition, the third baffle is located on the right side of the first partition and overlaps with the first partition, and the fourth baffle is located on the right side of the third partition and overlaps with the third partition.

[0009] According to one aspect of the present invention, the adsorbent material is one of granular activated carbon, honeycomb activated carbon or honeycomb zeolite.

[0010] The waste gas adsorption box of the present invention changes the cross-sectional area of the windward side during adsorption and desorption of the adsorption bed, so that the change in flow velocity caused by the change in flow rate during adsorption and desorption is small, and the gas can be evenly distributed whether during adsorption or desorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematically showing the state diagram of the adsorbed gas of the waste gas adsorption box according to an embodiment of the present invention;

[0012] Figure 2 Schematically showing the state diagram of the desorbed gas of the waste gas adsorption box. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] The present invention will be described in detail below in conjunction with the drawings and specific embodiments. The embodiments cannot be described in detail one by one here, but the embodiments of the present invention are not limited to the following embodiments.

[0015] Combined Figure 1 and Figure 2 As shown, the present invention provides a waste gas adsorption box, including a box body 1, and the middle section of the box body 1 is filled with an adsorbent material 2. The adsorbent material 2 can be a material with adsorption ability such as granular activated carbon, honeycomb activated carbon or honeycomb zeolite.

[0016] In this embodiment, there are a first chamber 3 and a second chamber 4 between the adsorption material 2 and the box body 1 respectively. The adsorption material 2 has a plurality of partitions dividing the adsorption material 2 into a plurality of regions. In the first chamber 3, there are a first baffle 6 and a second baffle 7 hinged to the inner wall of the box body 1. In the second chamber 4, there are a third baffle 8 and a fourth baffle 9 hinged to the inner wall of the box body 1. A first connection flange 31 is provided at the first chamber 3, and a second connection flange 41 is provided at the second chamber 4. The first flange 31 and the second flange 41 are connected to an external pipeline. And the first connection flange 31 and the second connection flange 41 are arranged on opposite side walls of the box body 1.

[0017] According to an embodiment of the present invention, the adsorption material 2 is equally spaced with a first partition 2a, a second partition 2b, a third partition 2c and a fourth partition 2d, dividing the adsorption material 2 into a first region 21, a second region 22, a third region 23, a fourth region 24 and a fifth region 25. And the first baffle 6, the second baffle 7, the third baffle 8 and the fourth baffle 9 all have two states of being open and closed. When the first baffle 6, the second baffle 7, the third baffle 8 and the fourth baffle 9 are in the closed state, the first baffle 6 is located on the right side of the second partition 2b and overlaps with the second partition 2b, the second baffle 7 is located on the right side of the fourth partition 2d and overlaps with the fourth partition 2d, the third baffle 8 is located on the right side of the first partition 2a and overlaps with the first partition 2a, and the fourth baffle 9 is located on the right side of the third partition 2c and overlaps with the third partition 2c.

[0018] For the waste gas adsorption box of the present invention, when adsorbing waste gas, the first baffle 6, the second baffle 7, the third baffle 8 and the fourth baffle 9 are in the horizontal position and in the open state. The waste gas to be treated enters from the second connection flange 41. The first region 21, the second region 22, the third region 23, the fourth region 24 and the fifth region 25 are in a parallel state. The waste gas uniformly passes through the adsorption material 2 and is then discharged through the first connection flange 31.

[0019] When the adsorption is saturated, the first baffle 6, the second baffle 7, the third baffle 8 and the fourth baffle 9 are in a vertical position, presenting a closed state. The desorption hot gas enters from the first connecting flange 31. Since the first baffle 6 is lapped with the second partition 2b on the right side of the second partition 2b, the second baffle 7 is lapped with the fourth partition 2d on the right side of the fourth partition 2d, the third baffle 8 is lapped with the first partition 2a on the right side of the first partition 2a, and the fourth baffle 9 is lapped with the third partition 2c on the right side of the third partition 2c. Therefore, the hot gas can only flow downward from the fifth area 25, then enter the fourth area 24 from the lower side, and then sequentially pass through the third area 23, the second area 22 and the first area 21, and finally be discharged through the second connecting flange 41. At this time, the first area 21, the second area 22, the third area 23, the fourth area 24 and the fifth area 25 are in series, reducing the windward area of the desorption hot gas, increasing the flow resistance of the desorption hot gas, and making the distribution of the desorption hot gas more uniform.

[0020] The above is only one embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An exhaust gas adsorption box, characterized in that, It includes a box body (1), an adsorption material (2) is filled in the middle section of the box body (1), a first chamber (3) and a second chamber (4) are respectively formed between the adsorption material (2) and the box body (1), the adsorption material (2) has a plurality of partition plates dividing the adsorption material (2) into multiple regions, a first baffle (6) and a second baffle (7) hinged to the inner wall of the box body (1) are arranged in the first chamber (3), a third baffle (8) and a fourth baffle (9) hinged to the inner wall of the box body (1) are arranged in the second chamber (4), a first connecting flange (31) is arranged at the first chamber (3), a second connecting flange (41) is arranged at the second chamber (4), and the first connecting flange (31) and the second connecting flange (41) are arranged on opposite side walls of the box body (1); The adsorption material (2) is provided with a first partition plate (2a), a second partition plate (2b), a third partition plate (2c) and a fourth partition plate (2d) at equal intervals, dividing the adsorption material (2) into a first region (21), a second region (22), a third region (23), a fourth region (24) and a fifth region (25); The first baffle (6), the second baffle (7), the third baffle (8) and the fourth baffle (9) all have two states of opening and closing; When the first baffle (6), the second baffle (7), the third baffle (8) and the fourth baffle (9) are in the closed state, the first baffle (6) is located on the right side of the second partition plate (2b) and overlaps with the second partition plate (2b), the second baffle (7) is located on the right side of the fourth partition plate (2d) and overlaps with the fourth partition plate (2d), the third baffle (8) is located on the right side of the first partition plate (2a) and overlaps with the first partition plate (2a), and the fourth baffle (9) is located on the right side of the third partition plate (2c) and overlaps with the third partition plate (2c); The adsorption material (2) is one of granular activated carbon, honeycomb activated carbon or honeycomb zeolite.

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