Biological filter material layer gas distribution system for waste gas treatment

Abstract

The utility model discloses a gas distribution system for a filter material layer of a biological filter for waste gas treatment, and relates to the technical field of biological filters for waste gas treatment. Comprising a biological filter body, a biological filter material is arranged in the biological filter body, a plurality of gas distributors are uniformly distributed in the biological filter material, each gas distributor is of a vertical barrel structure, a plurality of first through holes are uniformly formed in the side part of each gas distributor, and a perforated bottom plate is arranged at the bottom of each gas distributor; a top sealing plate is arranged at the top end of the gas distributor. According to the utility model, the gas distributor is arranged in the biological filter material, and waste gas circulates in the first connecting pipe, the upper chamber, the upper filter material layer, the middle filter material layer, the lower filter material layer, the gas distributor, the lower chamber and the second connecting pipe, so that the wind passing resistance of the filter material layers is controlled, and the gas treatment amount of the biological filter body is ensured; meanwhile, the gas is more uniformly distributed on the filter material layer, the problem of bias flow of the gas on the filter material layer is relieved, and the waste gas treatment effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of biological filter technology for waste gas treatment, specifically to an air distribution system for the filter media layer of a biological filter for waste gas treatment. Background Technology

[0002] Waste gas treatment refers to the adoption of a series of technical means and measures to reduce or eliminate harmful gases emitted from industrial production, transportation, construction and other activities, so as to reduce environmental pollution, improve air quality and protect human health.

[0003] Biological processes are widely used in the field of waste gas treatment. Representative equipment includes bio-trickling filters, bio-filters, and bio-scrubbers. With the widespread adoption of this technology, its drawbacks in long-term operation and use have gradually become apparent. Among them, the increasing pressure of the filter media layer year by year, which leads to increased equipment resistance in the later stages, and the uneven air distribution of the filter media layer, which easily leads to low effective utilization of the filter media layer, are two particularly prominent problems. Therefore, this utility model is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an air distribution system for the filter media layer of a biological filter bed for waste gas treatment, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a biological filter bed gas distribution system for waste gas treatment, comprising a biological filter body, biological filter media inside the biological filter body, multiple gas distributors evenly distributed within the biological filter media, the gas distributors being configured as vertical cylindrical structures, multiple first through holes evenly opened on the side of the gas distributors, an open bottom plate at the bottom of the gas distributors, and a top sealing plate at the top of the gas distributors.

[0006] Preferably, the perforated bottom plate is provided with a plurality of second through holes evenly distributed. The diameters of the first and second through holes are smaller than the pore diameter of the biological filter material. The first and second through holes serve to guide the flow of gas.

[0007] Preferably, the biofilter body is divided into an upper chamber and a lower chamber by biological filter media.

[0008] Preferably, the bottom of the biological filter media is provided with a filter media support plate, which is fixed to the inner wall of the biological filter body, and the gas distributor is installed on the filter media support plate.

[0009] Preferably, a first connecting pipe is provided on one side of the top of the biological filter body, and the first connecting pipe is connected to the upper chamber; a second connecting pipe is provided on one side of the lower part of the biological filter body, and the second connecting pipe is connected to the lower chamber.

[0010] Preferably, the biological filter media has multiple layers, consisting of a lower filter layer, a middle filter layer, and an upper filter layer from bottom to top, for multi-stage treatment of waste gas.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This biological filter media layer gas distribution system for waste gas treatment, through the installation of a gas distributor within the biological filter media, allows waste gas to flow through the first connecting pipe, upper chamber, upper filter media layer, middle filter media layer, lower filter media layer, gas distributor, lower chamber, and second connecting pipe. This controls the air resistance of the filter media layer, ensures the gas treatment capacity of the biological filter body, and makes the gas distribution in the filter media layer more uniform, reducing the problem of gas flow deviation in the filter media layer and ensuring the waste gas treatment effect. Attached Figure Description

[0013] Figure 1 This is a first cross-sectional view of the present invention;

[0014] Figure 2 This is a second cross-sectional view of the present invention;

[0015] Figure 3 This is an unfolded view of the gas distributor of this utility model;

[0016] Figure 4 This is a front view of the gas distributor of this utility model;

[0017] Figure 5 This is a schematic diagram of the flow pattern of gas passing from bottom to top through the biological filter media in the gas-free distributor of this utility model.

[0018] Figure 6 This is a schematic diagram of the flow pattern of gas passing from top to bottom through the biological filter media in the gas-free distributor of this utility model.

[0019] Figure 7 This is a schematic diagram of the flow pattern of gas passing from bottom to top through the biological filter media when the gas distributor is present in this utility model.

[0020] Figure 8 This is a schematic diagram of the flow pattern of gas passing from top to bottom through the biological filter media when the gas distributor is present in this utility model.

[0021] Figure 9 This is a schematic diagram of the flow pattern of gas passing from bottom to top through the biological filter media when a gas distributor is installed in the middle and later stages of the operation of the biological filter of this utility model.

[0022] Figure 10 This is a schematic diagram of the flow pattern of gas passing from top to bottom through the biological filter media when a gas distributor is installed in the middle and later stages of the operation of the biological filter of this utility model.

[0023] Figure 11 This is a schematic diagram showing the placement of the gas distributor of this utility model on the filter media support plate.

[0024] In the figure: 1. Biological filter body; 2. Biological filter media; 201. Filter media support plate; 3. Gas distributor; 301. First through hole; 302. Perforated bottom plate; 303. Top sealing plate. Detailed Implementation

[0025] 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.

[0026] In the process of waste gas treatment, a filter media layer gas distribution system is required. The gas distribution system provided by this utility model is specifically designed to control the air resistance of the filter media layer, ensuring the treatment volume of the biological filter, and making the gas distribution in the filter media layer more uniform, thus reducing the problem of gas flow deviation in the filter media layer. Before using this system, it is necessary to carry out preparatory work such as inspection to ensure the normal operation of the system.

[0027] like Figures 1-11 As shown, this utility model provides a technical solution: a biological filter media layer gas distribution system for waste gas treatment, including a biological filter body 1, a biological filter media 2 inside the biological filter body 1, a plurality of gas distributors 3 evenly distributed inside the biological filter media 2, the gas distributors 3 being configured as vertical cylindrical structures, a plurality of first through holes 301 evenly opened on the side of the gas distributors 3, an open bottom plate 302 provided at the bottom of the gas distributors 3, and a top sealing plate 303 provided at the top of the gas distributors 3. It should be noted that the gas distributors 3 are not fixed in size and shape, and are usually configured as circular cylindrical structures or square cylindrical structures.

[0028] In this embodiment, a plurality of second through holes are uniformly formed on the perforated bottom plate 302. The diameters of the first through holes 301 and the second through holes are smaller than the pore diameter of the biological filter material 2. The first through holes 301 and the second through holes serve to guide the flow of gas. It should be noted that the first through holes 301 and the second through holes are not limited to small pore diameters. When the first through holes 301 and the second through holes are large pores, that is, when the pore diameters of the first through holes 301 and the second through holes are larger than the pore diameter of the biological filter material 2, the inner or outer wall of the gas distributor 3 is covered with a fine mesh screen to block the biological filter material 2 from entering. The number and form of the gas distributor 3 arranged in the biological filter material 2 need to be calculated and confirmed.

[0029] In this embodiment, the biofilter body 1 is divided into an upper chamber and a lower chamber by the biofilter media 2. A filter media support plate 201 is provided at the bottom of the biofilter media 2. The filter media support plate 201 is fixed to the inner wall of the biofilter body 1, and the gas distributor 3 is installed on the filter media support plate 201.

[0030] In this embodiment, a first connecting pipe is connected to the top side of the biofilter body 1, and the first connecting pipe is connected to the upper chamber. A second connecting pipe is connected to the lower side of the biofilter body 1, and the second connecting pipe is connected to the lower chamber. The biofilter material 2 is provided with multiple layers, from bottom to top: a lower filter material layer, a middle filter material layer, and an upper filter material layer, for multi-stage treatment of waste gas. Through the setting of the gas distributor 3 in the biofilter material 2, the waste gas flows through the first connecting pipe, the upper chamber, the upper filter material layer, the middle filter material layer, the lower filter material layer, the gas distributor 3, the lower chamber, and the second connecting pipe, which controls the air resistance of the filter material layer, ensures the treatment volume of the biofilter body 1, and makes the gas distribution in the filter material layer more uniform, reducing the problem of gas flow deviation in the filter material layer and ensuring the waste gas treatment effect. The biofilter material 2 is existing technology.

[0031] Working Principle: When using this system for waste gas treatment, in the initial stage of operation of the biological filter body 1, the air velocity through the filter media layer is low. When waste gas passes through the biological filter media 2 from bottom to top, a large amount of waste gas starts from the lower chamber of the lower space of the biological filter media 2, passes through the lower filter media layer, the middle filter media layer, and the upper filter media layer in sequence, and finally reaches the upper chamber of the upper space of the filter media layer. A small amount of waste gas directly enters the middle filter media layer through the gas distributor 3, and then passes through the upper filter media layer to reach the upper chamber of the upper space of the biological filter media 2. When waste gas passes through the biological filter media 2 from top to bottom, a large amount of waste gas starts from the upper chamber of the upper space of the biological filter media 2, passes through the upper filter media layer, the middle filter media layer, and the lower filter media layer in sequence, and finally reaches the upper chamber of the upper space of the filter media layer. A small amount of waste gas passes through the upper filter media layer, and then directly enters the lower chamber of the lower space of the biological filter media 2 through the gas distributor 3 in the middle filter media layer. At this time, the gas distributor 3 plays the role of guiding the airflow. Compared with the filter structure without the gas distributor 3, the gas distribution in the filter layer is more uniform, which reduces the problem of gas flow deviation in the filter layer.

[0032] In the later stages of operation of the biological filter body 1, due to issues such as the accumulation of microbial metabolism and the compression of the filter media layer, the porosity of the filter media layer decreases or even local caking occurs. This situation mostly occurs in the middle and lower filter media layers, which in turn leads to an increase in the air velocity through the filter media layer and a significant increase in the air resistance. Since the gas distributor 3 itself does not become a carrier for microbial biofilm formation, or has a low biofilm formation rate and no clogging problem, the gas distributor 3 provides a channel for waste gas to directly pass through the lower or middle filter media layer. When the waste gas passes through the middle and lower filter media layers, a small amount of waste gas directly passes through the filter media layer, while a large amount of waste gas passes through the middle and lower filter media layers through the gas distributor 3, effectively controlling the air resistance of the filter media layer and ensuring the amount of gas that the biological filter body 1 can treat.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A biological filter media layer air distribution system for waste gas treatment, comprising a biological filter body (1), characterized in that: The biological filter body (1) is equipped with biological filter media (2), and multiple gas distributors (3) are evenly distributed inside the biological filter media (2). The gas distributors (3) are configured as vertical cylindrical structures. Multiple first through holes (301) are evenly opened on the side of the gas distributors (3). An open bottom plate (302) is provided at the bottom of the gas distributors (3), and a top sealing plate (303) is provided at the top of the gas distributors (3).

2. The aeration system for a biological filter bed in waste gas treatment according to claim 1, characterized in that: The perforated bottom plate (302) is provided with a plurality of second through holes evenly distributed. The diameters of the first through hole (301) and the second through hole are smaller than the pore diameter of the biological filter material (2). The first through hole (301) and the second through hole serve to guide the flow of gas.

3. The biological filter media layer aeration system for waste gas treatment according to claim 1, characterized in that: The biological filter body (1) is divided into an upper chamber and a lower chamber by biological filter media (2).

4. The aeration system for a biological filter bed in waste gas treatment according to claim 1, characterized in that: The biological filter media (2) is provided with a filter media support plate (201) at the bottom. The filter media support plate (201) is fixed to the inner wall of the biological filter body (1). The gas distributor (3) is installed on the filter media support plate (201).

5. The aeration system for a biological filter bed in waste gas treatment according to claim 3, characterized in that: The top side of the biological filter body (1) is connected to a first connecting pipe, which is connected to the upper chamber. The lower side of the biological filter body (1) is connected to a second connecting pipe, which is connected to the lower chamber.

6. The aeration system for a biological filter bed in waste gas treatment according to claim 1, characterized in that: The biological filter media (2) has multiple layers, consisting of a lower filter layer, a middle filter layer, and an upper filter layer from bottom to top, for multi-stage treatment of waste gas.

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