Filter bag biological membrane waste gas treatment device

Abstract

The utility model provides a filter bag biofilm waste gas treatment device, which comprises a tank body and an adsorption device positioned in the tank body, the adsorption device comprises at least one filter bag biofilm adsorption unit, and the filter bag biofilm adsorption unit comprises a biofilm filter bag and a support frame positioned in the biofilm filter bag. The biological membrane filter bag is formed by weaving three layers of structures through cotton ropes, and the three layers of structures comprise non-woven fabric layers located on the inner layer and the outer layer and adsorption particles located on the middle layer. The activated carbon particles coated with microorganisms are woven in the two layers of non-woven fabrics, the formed biological membrane filter bag is sleeved on the long support frame, the long-column-shaped filter bag biological membrane adsorption unit is formed, and compared with disorderly stacked biological filler layers of a traditional biological spray tower, the adsorption particles are in a regular long column shape, so that the adsorption effect is good, and the adsorption effect is good. The contact area of the waste gas and the adsorption particles is greatly increased, the effective utilization rate of the adsorption particles is higher, and the occupied area of the tank body is greatly reduced; the purification efficiency of the waste gas is also obviously improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental purification, and particularly relates to a filter bag biofilm waste gas treatment device. Background Art

[0002] The traditional biological waste gas purification device is Figure 1 The biological spray tower shown in the figure has a packing layer 01, a circulating liquid storage tank 02 located below the packing layer 01, a circulating liquid pump 03 and a spray device 04 arranged in the tower body. The circulating liquid pump 03 transports the circulating liquid in the circulating liquid storage tank 02 to the spray device 04, and evenly sprays the circulating liquid in the packing layer 01. The exhaust gas enters the air distribution space at the bottom of the tower from the gas collecting air duct 07, enters the packing layer 01 from the bottom of the packing layer 01 for purification, and continuously passes through the gap of the packing layer 01 in countercurrent with the circulating liquid, and is fully in contact with the packing with a certain humidity. Microorganisms are attached to the surface of the packing, and the malodorous components in the exhaust gas are first absorbed by the packing, and then oxidized and decomposed by the microorganisms in the packing to achieve the purpose of eliminating odor and complete the deodorization process. The purified gas is discharged through the gas collecting air duct 08, and the circulating liquid finally flows back to the circulating liquid storage tank 02 at the bottom of the tower for recycling. A water supply pipe 05 and a drainage pipe 06 are also arranged in the tower body, and the water supply pipe 05 is used to replenish fresh circulating liquid.

[0003] However, this traditional biological waste gas purification device has a complex structure, occupies a large area, is bulky, and has a low waste gas purification efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a filter bag biofilm waste gas treatment device.

[0005] To achieve the above purpose, the solution adopted by the utility model is as follows:

[0006] The utility model provides a filter bag biofilm waste gas treatment device, comprising a tank body and an adsorption device located in the tank body, the adsorption device comprising at least one filter bag biofilm adsorption unit extending axially, each filter bag biofilm adsorption unit comprising a biofilm filter bag and a support frame located in the biofilm filter bag, the biofilm filter bag is formed by weaving a three-layer structure through cords, and the three-layer structure is a non-woven fabric layer located in an inner and outer layer and adsorption particles located in a middle layer.

[0007] Preferably, the adsorption device further comprises a support panel for supporting and fixing the filter bag biofilm adsorption unit in the tank body; the support panel is located at the end of the filter bag biofilm adsorption unit and is arranged perpendicular to the axis of the tank body.

[0008] Preferably, the end of the inner support frame of the filter bag of the filter bag biofilm adsorption unit is fixed to the support panel; preferably, the end of the inner support frame of the filter bag of the filter bag biofilm adsorption unit is fixed to the support panel by bolts.

[0009] Preferably, the adsorption particles in the middle layer are activated carbon particles coated with microorganisms.

[0010] Preferably, the adsorption device comprises a plurality of filter bag biofilm adsorption units arranged in an array.

[0011] Preferably, it also includes a circulating spraying device, which includes a circulating liquid storage tank, a circulating liquid pump, a spraying pipeline and a plurality of nozzles located in the tank body, and the arrangement positions of the plurality of nozzles correspond one-to-one to the center positions of the biofilm filter bags of the plurality of filter bag biofilm adsorption units.

[0012] Preferably, a rotor flowmeter for controlling the flow rate and flow velocity of the circulating liquid is also provided on the path of the spray pipeline.

[0013] Preferably, the circulating liquid storage tank is located below the adsorption device, and is used to store the circulating liquid and collect the circulating liquid sprayed by the circulating spraying device after being adsorbed by the adsorption device.

[0014] Preferably, the tank body is provided with an air inlet, an air outlet, a circulating liquid output port and a circulating liquid input port, the air inlet is located at the bottom of the adsorption device and above the circulating liquid storage tank, the air outlet is located at the top of the tank body, the circulating liquid output port is located at the side of the circulating liquid storage tank, at the position where the spray pipeline outputs from the circulating liquid storage tank, and the circulating liquid input port is located at the side of the tank body, at the position where the spray pipeline enters the tank body.

[0015] Preferably, it also includes a water supply pipeline and a drainage pipeline located on the side of the circulating liquid storage tank, and a water supply pipeline valve and a drainage pipeline valve are respectively provided on the water supply pipeline and the drainage pipeline.

[0016] Beneficial Effects

[0017] The utility model provides a filter bag biofilm waste gas treatment device, in which activated carbon particles coated with microorganisms are woven into two layers of non-woven fabrics, and the formed biofilm filter bag is put on a long support frame to form a long columnar filter bag biofilm adsorption unit, and a plurality of such long columnar filter bag biofilm adsorption units are distributed in the tank body. Compared with the disorderly stacked biological filler layers of the traditional biological spray tower, the adsorption particles in the filter bag biofilm adsorption unit are regular long columns, and the contact area between the waste gas and the adsorption particles in the filter bag biofilm adsorption unit is greatly increased. Moreover, the effective utilization rate of the adsorption particles in the biological filler layer of the traditional biological spray tower is greater, which can greatly reduce the footprint of the tank body; at the same time, it also significantly improves the purification efficiency of the waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a traditional biological spray tower mentioned in the background technology of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the filter bag biofilm waste gas treatment device involved in the utility model.

[0020] Figure 3 for Figure 2 A partial enlarged schematic diagram of the biofilm adsorption unit of the middle filter bag.

[0021] Figure 4 This is a schematic structural diagram of the tank body of the filter bag biofilm waste gas treatment device involved in the utility model.

[0022] Figure 5 for Figure 4 Middle AA section view.

[0023] Figure 6 for Figure 5 Middle BB section view.

[0024] Figure 7 for Figure 5 Middle CC section view. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] To this end, the following solutions are proposed:

[0032] See also Figure 2 The utility model provides a filter bag biofilm waste gas treatment device, including a tank body 1, an adsorption device 2 and a circulating spray device 3, wherein the adsorption device 2 is located in the tank body 1 and includes at least one filter bag biofilm adsorption unit 21 extending axially.

[0033] like Figure 3As shown, each filter bag biofilm adsorption unit 21 includes a biofilm filter bag 211 and a support frame 212 located in the biofilm filter bag 211, wherein the biofilm filter bag 211 is composed of a three-layer structure, which is an acid-alkali resistant non-woven fabric layer 211a located in the inner and outer layers and adsorption particles 211b located in the middle layer, wherein the adsorption particles 211b are activated carbon particles coated with microorganisms. The three-layer structure is formed into an adsorption device of a filter bag structure by weaving a rope, and this weaving method can evenly arrange the adsorption particles 211b in the formed biofilm filter bag 211 to prevent gas short circuit caused by uneven thickness of the membrane body.

[0034] In the filter bag biofilm waste gas treatment device of the utility model, the biofilm filter bag 211 is placed in the support frame 212 to form a support effect on the biofilm filter bag 211, wherein the support frame 212 is a long columnar structure, so that a filter bag biofilm adsorption unit 21 formed is also a long columnar structure.

[0035] In some embodiments, the adsorption device 2 includes a plurality of such filter bag biofilm adsorption units 21, which are arranged in an array inside the entire tank body 1, such as Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown in the figure, a preferred arrangement is given, that is, in the upper and lower symmetrical area of ​​the diameter of the tank body 1, three rows of 7 such filter bag biofilm adsorption units 21 are arranged in each row, and then in its upper and lower symmetrical area, each row of 5 such filter bag biofilm adsorption units 21 is arranged, and then in its upper and lower symmetrical area, each row of 3 such filter bag biofilm adsorption units 21 is arranged, and each filter bag biofilm adsorption unit 21 is arranged in parallel along the axial direction in the tank body 1.

[0036] In the filter bag biofilm waste gas treatment device of the utility model, as Figure 5 , Figure 7 As shown, the adsorption device 2 further includes a support panel 22 for supporting and fixing the filter bag biofilm adsorption unit 21 in the tank body 1 . The support panel 22 is located at the end of the filter bag biofilm adsorption unit 21 and is arranged perpendicular to the axis of the tank body 1 .

[0037] In some embodiments, the end (e.g., the upper end) of the support frame 212 of the filter bag biofilm adsorption unit 21 is fixed to the support panel 22. As a preferred embodiment, the end (e.g., the upper end) of the support frame 212 of the filter bag biofilm adsorption unit 21 is fixed to the support panel 22 by bolts.

[0038] Furthermore, if Figure 7As shown, according to the arrangement of the filter bag biofilm adsorption units 21 in the tank body 1, the support panel 22 includes a plurality of transverse connecting strips 221 connecting the tops of each row of filter bag biofilm adsorption units 21 and a longitudinal connecting strip 222 connecting the plurality of transverse connecting strips, wherein one end of the middle transverse connecting strip 221 further extends outward to the inner wall of the tank body 1, thereby fixing the entire support panel 22 to the inner wall of the tank body 1. Of course, other structural forms of connecting strips are also possible, and any structure that fixes the filter bag biofilm adsorption unit 21 to the support panel 22 is within the protection scope of the present utility model.

[0039] In the filter bag biofilm waste gas treatment device of the utility model, as Figure 2 As shown, the circulating spray device 3 includes a circulating liquid storage tank 31, a circulating liquid pump 32, a spray pipeline 33 and a plurality of nozzles 34 located in the tank body 1. The circulating liquid pump 32 transports the circulating liquid in the circulating liquid storage tank 31 to the plurality of nozzles 34 located in the tank body 1 through the spray pipeline 33, and sprays the circulating liquid on the filter bag biofilm adsorption unit 21 of the adsorption device 2. The arrangement positions of these plurality of nozzles 34 correspond one-to-one to the center positions of the biofilm filter bags 211 of each filter bag biofilm adsorption unit 21, so as to ensure that each biofilm filter bag 211 can obtain sufficient spray circulating liquid to improve the gas-liquid mass transfer efficiency.

[0040] In some embodiments, the circulating liquid storage tank 31 is located below the adsorption device 2, and is used to store the circulating liquid and collect the circulating liquid sprayed from the nozzle 34 after being adsorbed by the filter bag biofilm adsorption unit 21 of the adsorption device 2. In addition, a rotor flowmeter 35 for controlling the flow rate and flow velocity of the circulating liquid is also provided on the path of the spray pipeline 33, and a liquid level meter 36 is provided in the circulating liquid storage tank 31.

[0041] In the filter bag biofilm waste gas treatment device of the utility model, as Figure 2 , Figure 4 and Figure 5 As shown, the tank body 1 is provided with an air inlet 11, an air outlet 12, a circulating liquid output port 13 and a circulating liquid input port 14. The air inlet 11 is located at the bottom of the adsorption device 2 and above the circulating liquid storage tank 31. In the figure, the air inlet duct 4 located at the air inlet 11 is connected to the tank body 1 in a horizontal rotary cut structure; the air outlet 12 is located at the top of the tank body 1; the circulating liquid output port 13 is located at the side of the circulating liquid storage tank 31, where the spray pipeline 33 is output from the circulating liquid storage tank; and the circulating liquid input port 14 is located at the side of the tank body 1, where the spray pipeline 33 enters the tank body 1.

[0042] In the filter bag biofilm waste gas treatment device of the utility model, as Figure 2As shown, the filter bag biofilm waste gas treatment device also includes a water supply pipeline 5 and a drainage pipeline 6 located on the side of the circulating liquid storage tank 31, and a water supply pipeline valve 7 and a drainage pipeline valve 8 are respectively provided on the water supply pipeline 5 and the drainage pipeline 6.

[0043] During the use of the filter bag biofilm waste gas treatment device of the utility model, the waste gas enters the tank body 1 from the air inlet pipe 4 through the air inlet 11. At the same time, the circulating liquid pump 32 transports the circulating liquid in the circulating liquid storage tank 31 to the several nozzles 34 located in the tank body 1 through the spray pipeline 33, and sprays the circulating liquid on the filter bag biofilm adsorption unit 21 of the adsorption device 2. The incoming waste gas moves upward evenly in the air distribution space at the bottom of the adsorption device 2, and continuously passes through the gaps of each filter bag biofilm adsorption unit 21 of the adsorption device 2 in countercurrent with the circulating liquid under the spray, and fully contacts with the adsorption particles 211b of the biofilm filter bag 211 in the filter bag biofilm adsorption unit 21 with a certain humidity. The porous structure of the activated carbon in the adsorption particles 211b promotes the exhaust gas. The activated carbon surface in the adsorption particles 211b is coated with microorganisms. After the waste gas is fully absorbed by the activated carbon in the adsorption particles 211b, the microorganisms on the surface of the activated carbon in the adsorption particles 211b oxidize and decompose, and attach and grow to form a biofilm. In the biofilm, the microorganisms use organic waste gas as a carbon source and energy source, and nutrients in the circulating liquid (such as complex nutrients containing nitrogen, phosphorus, potassium, etc.) as a nitrogen source to carry out life activities. A part of the organic odor components in the waste gas are converted into harmless water and carbon dioxide through the decomposition and metabolism of the microorganisms, and provide energy for the microorganisms. A part of the organic pollutants are converted into the life substances of the microorganisms themselves through anabolism, thereby achieving the purpose of eliminating odor and completing a high-concentration waste gas treatment process. The purified gas is then discharged from the gas outlet 12 of the tank body 1, and the circulating liquid finally flows back to the circulating liquid storage tank 31 at the bottom of the tank body 1 for recycling. After the circulating liquid in the circulating liquid storage tank 31 absorbs enough malodorous components, the drain pipe valve 8 and the water supply pipe valve 7 can be opened successively to replenish fresh circulating liquid to ensure that the microorganisms in the waste gas treatment device of the utility model can stably carry out metabolic activities.

[0044] In the filter bag biofilm waste gas treatment device of the utility model, the circulating liquid can be selected according to the properties of the pollution source gas. If the odor source contains acidic gases such as hydrogen sulfide as the main component, the circulating liquid can be selected as alkaline solution; if the ammonia concentration in the odor source is high, the circulating liquid can be selected as dilute sulfuric acid; if the odor source contains a large number of volatile organic components, the circulating liquid can be selected as sodium hypochlorite solution or other oxidant products. The circulating liquid can also contain nutrients for the microorganisms on the surface of the activated carbon in the adsorption particles 211b of the biofilm filter bag 211 to carry out life activities, such as composite nutrients containing nitrogen, phosphorus, potassium, etc.

[0045] The filter bag biofilm waste gas treatment device provided by the utility model is provided with several filter bag biofilm adsorption units 21, and activated carbon particles coated with microorganisms are woven into two layers of non-woven fabrics. The formed biofilm filter bag 211 is sleeved on a long support frame 212 to form a long columnar filter bag biofilm adsorption unit 21, and several such long columnar filter bag biofilm adsorption units 21 are distributed in the tank body 1. Compared with the disorderly stacked biological filler layer of the traditional biological spray tower, the adsorption particles in the filter bag biofilm adsorption unit 21 are regular long columns, and the contact area between the waste gas and the adsorption particles in the filter bag biofilm adsorption unit 21 is greatly increased. Moreover, the effective utilization rate of the adsorption particles in the biological filler layer of the traditional biological spray tower is greater, which can increase the amount of waste gas treated per unit area and greatly reduce the floor space of the tank body 1.

[0046] In terms of the purification efficiency of waste gas, the filter bag biofilm waste gas treatment device provided by the utility model has a linear waste gas channel passing upward. Compared with the disorderly stacked biological filler layers of the traditional biological spray tower, the rising speed of the waste gas is faster, and the contact efficiency with the adsorption particles in the filter bag biofilm adsorption unit 21 is higher, which can significantly improve the chemical reaction efficiency and the biological metabolism efficiency, thereby significantly improving the purification efficiency of the waste gas.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A filter bag biofilm waste gas treatment device, characterized in that: It includes a tank body and an adsorption device located inside the tank body, the adsorption device includes at least one axially extending filter bag biofilm adsorption unit, each filter bag biofilm adsorption unit includes a biofilm filter bag and a support frame located inside the biofilm filter bag, the biofilm filter bag is formed by weaving a three-layer structure with ropes, and the three-layer structure is a non-woven fabric layer located at the inner and outer layers and adsorption particles located at the middle layer.

2. The filter bag biofilm waste gas treatment device according to claim 1 is characterized in that: The adsorption device further comprises a support panel for supporting and fixing the filter bag biofilm adsorption unit in the tank body; the support panel is located at the end of the filter bag biofilm adsorption unit and is arranged perpendicular to the axis of the tank body.

3. The filter bag biofilm waste gas treatment device according to claim 2 is characterized in that: The end of the filter bag inner support frame of the filter bag biofilm adsorption unit is fixed on the support panel.

4. The filter bag biofilm waste gas treatment device according to claim 3 is characterized in that: The end of the filter bag inner support frame of the filter bag biofilm adsorption unit is fixed to the support panel by bolts.

5. The filter bag biofilm waste gas treatment device according to claim 1, characterized in that: The adsorption particles in the middle layer are activated carbon particles coated with microorganisms.

6. The filter bag biofilm waste gas treatment device according to claim 1, characterized in that: The adsorption device comprises a plurality of filter bag biofilm adsorption units arranged in an array.

7. The filter bag biofilm waste gas treatment device according to claim 6, characterized in that: It also includes a circulating spraying device, which includes a circulating liquid storage tank, a circulating liquid pump, a spraying pipeline and a plurality of nozzles located in the tank body, and the arrangement positions of the plurality of nozzles correspond one by one to the center positions of the biofilm filter bags of the plurality of filter bag biofilm adsorption units.

8. The filter bag biofilm waste gas treatment device according to claim 7, characterized in that: A rotor flowmeter for controlling the flow rate and flow velocity of the circulating liquid is also provided on the path of the spray pipeline.

9. The filter bag biofilm waste gas treatment device according to claim 7, characterized in that: The circulating liquid storage tank is located below the adsorption device and is used to store the circulating liquid and collect the liquid after the circulating liquid sprayed by the nozzle is adsorbed by the adsorption device.

10. The filter bag biofilm waste gas treatment device according to claim 7, characterized in that: The tank body is provided with an air inlet, an air outlet, a circulating liquid output port and a circulating liquid input port. The air inlet is located at the bottom of the adsorption device and above the circulating liquid storage tank. The air outlet is located at the top of the tank body. The circulating liquid output port is located at the side of the circulating liquid storage tank and at the position where the spray pipeline outputs from the circulating liquid storage tank. The circulating liquid input port is located at the side of the tank body and at the position where the spray pipeline enters the tank body.

11. The filter bag biofilm waste gas treatment device according to claim 7, characterized in that: It also includes a water supply pipeline and a drainage pipeline located on the side of the circulating liquid storage tank, and a water supply pipeline valve and a drainage pipeline valve are respectively provided on the water supply pipeline and the drainage pipeline.

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