Cross-flow type biological deodorization device

Abstract

The utility model provides a cross-flow biological deodorization device which comprises a shell, and the shell is formed by transversely communicating a pre-washing area, a biological filter area and an activated carbon adsorption area which are sequentially arranged; the pre-washing area is separated from the biological filter area through a first steel grating; the biological filter tank area is separated from the activated carbon adsorption area through a second steel grating; the pre-washing area is sequentially provided with a first circulating water tank, a first supporting grid, a pre-washing filler layer and a first spraying pipe network from bottom to top; the biological filter area is provided with a second circulating water tank, a second supporting grid, a biological filler layer and a second spraying pipe network from bottom to top; and the activated carbon adsorption area is provided with a third supporting grid and an activated carbon filler layer from bottom to top. The device comprises a pre-washing area, a cellular biological filter area and an activated carbon adsorption area, adopts a transverse layout, is adjustable in height, realizes efficient deodorization and no secondary pollution through combination of biological treatment and activated carbon adsorption, and is suitable for height-limited places such as underground sewage treatment plants and the like.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and more specifically relates to a crossflow biological deodorization device. Background Technology

[0002] Based on deodorization principles, deodorization technologies can be categorized into physical deodorization, chemical deodorization, and biological deodorization. Commonly used physical methods include activated carbon adsorption or water washing, which, while not highly effective, are cost-effective. Chemical methods include chemical washing and incineration. Chemical washing utilizes gas-liquid contact to transfer gaseous odor components to the liquid phase, where chemical agents neutralize, oxidize, or otherwise react with these components to remove the odor. Typical chemical washing equipment often contains packing materials with large surface areas to enhance gas-liquid contact. The absorbent flows downwards from the top of the tower, while the exhaust gas is sprayed upwards, allowing the odor to react and be removed through thorough contact with the absorbent. Generally, alkaline and acidic odor components can be neutralized using acidic and alkaline solutions, respectively. However, this method only converts odor molecules into salts for absorption; further methods are needed to destroy or recover the odor components, inevitably leading to secondary pollution. The treatment of the absorbent produced by the washing tower is also a significant challenge.

[0003] Biological deodorization is a highly efficient, energy-saving, simple-to-operate and maintain treatment method that produces no secondary pollution. Its working principle is as follows: Waste gas first undergoes pretreatment (humidification) to remove particulate matter and adjust temperature and humidity. Then, it passes through a gas distributor into a biological deodorization device filled with biologically active media. Since the media contains a certain amount of moisture and its inner surface is covered with various microorganisms, when odorous gas enters the biological deodorization device, pollutants diffuse from the gas phase to the water film on the outer layer of the media and are absorbed by the media. Simultaneously, oxygen also enters the water film from the gas phase. The microorganisms attached to the media surface consume oxygen and decompose the pollutants into carbon dioxide, water, and inorganic salts. Based on the type of media and the composition of the spray solution, biological filters can be divided into soil biological filters, biological filters, and biological trickling filters, with biological filters being the most widely used. Currently, most biological filters on the market are vertical flow box type, which has limited practicality due to height restrictions. Utility Model Content

[0004] The purpose of this invention is to provide a crossflow biological deodorization device, which includes a pre-washing zone, a compartmented biological filter zone, and an activated carbon adsorption zone. It adopts a horizontal layout and is height-adjustable. Through the combination of biological treatment and activated carbon adsorption, it achieves efficient deodorization without secondary pollution and is suitable for height-restricted locations such as underground sewage treatment plants.

[0005] This utility model provides a crossflow biological deodorization device, including a rectangular shell. The shell is composed of a pre-washing zone, a biological filter zone, and an activated carbon adsorption zone arranged sequentially and connected laterally. The pre-washing zone and the biological filter zone are separated by a first steel grating and connected by a first vent. The biological filter zone and the activated carbon adsorption zone are separated by a second steel grating and connected by a second vent. The pre-washing zone is arranged from bottom to top with a first circulating water tank, a first supporting grid, a pre-washing packing layer, and a first spray pipe network. The biological filter zone is arranged from bottom to top with a second circulating water tank, a second supporting grid, a biological packing layer, and a second spray pipe network. The activated carbon adsorption zone is arranged from bottom to top with a third supporting grid and an activated carbon packing layer. The bottom of the activated carbon adsorption zone is connected to an air outlet, which is connected in sequence to a gas valve, a fan, and a gas flow monitor.

[0006] Furthermore, the pre-washing area is provided with two air chambers, namely a first air distribution chamber and a first air collection chamber. Both the first air distribution chamber and the first air collection chamber are formed by a first gas distributor and upper and lower steel plates. An air inlet is provided on the outer side of the first air distribution chamber and communicates with the pre-washing area. The first vent is provided in the first air collection chamber, and the bottom and top of the first vent are flush with the bottom and top of the first gas distributor, respectively.

[0007] Furthermore, the biological filter area includes a first biological filter cell and a second biological filter cell connected on one side. A second gas distribution chamber is provided on the side of the first biological filter cell connected to the first gas collection chamber. The first vent is connected to the second gas distribution chamber. A second gas collection chamber is provided on the same side of the second biological filter cell and the second gas distribution chamber. Both the second gas distribution chamber and the second gas collection chamber are formed by a second gas distributor and upper and lower steel plates. A cyclone demister is provided on the upper part of the second gas collection chamber. A second vent is provided on the upper part of the cyclone demister. The second vent is connected to the upper part of the activated carbon adsorption zone.

[0008] Furthermore, both the first and second spray pipe networks adopt a U-shaped structure, consisting of a main pipe and branch pipes; the second spray pipe network runs through the biological filter area and the pre-washing area and connects to the first external water pump, while the first spray pipe network connects to the second external water pump.

[0009] Furthermore, the outer shell is made of stainless steel with performance higher than 022Cr19Ni10, and the inner lining of the outer shell is made of glass fiber reinforced plastic; the first support grid, the second support grid, and the third support grid are all made of glass fiber reinforced resin.

[0010] Furthermore, the activated carbon packing layer in the activated carbon adsorption zone has a thickness of 500-800 mm and a packing particle size of 3-5 mm.

[0011] Furthermore, the biological packing layer in the biofilter area is a composite biological packing, composed of volcanic rock, ceramsite, and polyurethane foam mixed in a 1:1:2 ratio.

[0012] Furthermore, the pre-washed packing layer uses multi-faceted hollow sphere packing with a filling rate of 70-85%.

[0013] As described above, the cross-flow biological deodorization device of this utility model adopts a biological deodorization process, which has no secondary pollution, high deodorization efficiency, and low operating cost. The equipment is highly centralized, changing the existing traditional vertical flow box structure to a cross-flow structure. It can be prefabricated in a template factory, with a short installation cycle and low construction cost. The equipment height can be adjusted according to different applicable locations, making it suitable for underground sewage treatment plants and other places with height restrictions. Attached Figure Description

[0014] The present invention will be more fully understood through the following detailed description and in conjunction with the accompanying drawings, wherein similar elements are numbered in a similar manner, wherein:

[0015] Figure 1 This is a schematic diagram of the planar structure of the crossflow biological deodorization device of this utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the cross-flow biological deodorization device of this utility model;

[0017] Figure 3 This is a schematic diagram of the vertical cross-sectional structure of the pre-washing zone of the cross-flow biological deodorization device of this utility model;

[0018] Figure 4 This is a schematic diagram of the vertical cross-sectional structure of the first biological filter of the cross-flow biological deodorization device of this utility model.

[0019] Figure 5 This is a schematic diagram of the vertical cross-sectional structure of the second biological filter of the cross-flow biological deodorization device of this utility model.

[0020] In the diagram: 1. Shell; 11. Air inlet; 2. Pre-wash zone; 21. First circulating water tank; 22. First supporting grid; 23. Pre-wash packing layer; 24. First spray pipe network; 25. First air distribution chamber; 26. First air collection chamber; 27. First gas distributor; 28. First external water pump; 3. Biological filter zone; 31. Second circulating water tank; 32. Second supporting grid; 33. Biological packing layer; 34. Second spray pipe network; 35. First biological filter grid; 36. Second biological filter; 37. Second gas distribution chamber; 38. Second gas collection chamber; 39. Second gas distributor; 310. Cyclone demister; 311. Second external water pump; 4. Activated carbon adsorption zone; 41. Third support grid; 42. Activated carbon packing layer; 5. First steel grating; 6. First vent; 7. Second steel grating partition; 8. Second vent connection; 9. Gas outlet; 91. Gas valve; 92. Fan; 93. Gas flow monitor. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings, but this utility model is not limited to the following embodiments.

[0022] like Figure 1-5 As shown, this utility model provides a crossflow biological deodorization device, including a rectangular shell 1. The shell 1 is composed of a pre-washing zone 2, a biological filter zone 3, and an activated carbon adsorption zone 4 arranged in sequence and connected laterally. The pre-washing zone 2 and the biological filter zone 3 are separated by a first steel grating 5 and connected by a first vent 6. The biological filter zone 3 and the activated carbon adsorption zone 4 are separated by a second steel grating 7 and connected by a second vent 8. The pre-washing zone 2 is arranged from bottom to top with a first circulating water tank 21, a first supporting grid 22, a pre-washing packing layer 23, and a first spray pipe network 24. The biological filter zone 3 is arranged from bottom to top with a second circulating water tank 31, a second supporting grid 32, a biological packing layer 33, and a second spray pipe network 34. The activated carbon adsorption zone 4 is arranged from bottom to top with a third supporting grid 41 and an activated carbon packing layer 42. The bottom of the activated carbon adsorption zone 4 is connected to an air outlet 9, which is connected in sequence to a gas valve 91, a fan 92, and a gas flow monitor 93.

[0023] The pre-washing zone 2 has two air chambers arranged opposite each other, namely the first air distribution chamber 25 and the first air collection chamber 26. The first air distribution chamber 25 and the first air collection chamber 26 are both formed by the first gas distributor 27 and the upper and lower steel plates. The first air distribution chamber 25 has an air inlet 11 on its outside that communicates with the pre-washing zone 2. The first vent 6 is located in the first air collection chamber 26. The bottom and top of the first vent 6 are flush with the bottom and top of the first gas distributor 27, respectively.

[0024] The odorous gas to be treated enters through inlet 11, then passes evenly through the pre-washed packing layer 23 via the first gas distributor 27 in the first gas distribution chamber 25, and is collected by the first gas distributor 27 in the first gas collection chamber 26. Finally, it enters the biological filter zone 3 through the first vent 6 on the first steel grating 5 connected to the biological filter zone 3. The bottom of the first vent 6 is flush with the bottom of the first gas distributor 27 in the first gas collection chamber 26, and the top is at the same height as the first gas distributor 27. The first gas distribution chamber 25 is used for gas distribution, and the first gas collection chamber 26 is used for collecting the treated odorous gas.

[0025] The biofilter zone 3 includes a first biofilter 35 and a second biofilter 36 connected on one side. A second gas distribution chamber 37 is located on the side of the first biofilter 35 connected to the first gas collecting chamber 26. The first vent 6 communicates with the second gas distribution chamber 37. A second gas collecting chamber 38 is located on the same side of the second biofilter 36 and the second gas distribution chamber 37. Both the second gas distribution chamber 37 and the second gas collecting chamber 38 are formed by a second gas distributor 39 and upper and lower steel plates. A cyclone demister 310 is located on the upper part of the second gas collecting chamber 38, and a second vent is located on the upper part of the cyclone demister 310, communicating with the upper part of the activated carbon adsorption zone 4. The first biofilter 35 and the second biofilter 36 are arranged in a U-shape with one side connected. The second gas distribution chamber 37 and the second gas collecting chamber 38 are located on the unconnected side of the first biofilter 35 and the second biofilter 36 in the biofilter zone 3.

[0026] The biological filter area is divided into two compartments. Each compartment, from bottom to top, consists of a second circulating water tank 31, a second supporting grid 32, a biological packing layer 33, and a second spray pipe network 34. Odorous gas from the pre-washing zone 2 enters the second air distribution chamber 37 of the first biological filter 35 through the first vent 6. After being processed by the first biological filter 35, it enters the second biological filter 36, and finally the second air collection chamber 38 of the second biological filter 36. The moisture in the odorous gas is then removed by the cyclone demister 310 above, before it enters the activated carbon adsorption zone 4 through the second vent. The activated carbon adsorption zone 4 at the end removes moisture from the pre-washed and biologically filtered gas, reducing corrosion to the outlet 9, blower 92, and exhaust stack. The treated odorous gas is then discharged by the blower 92. The blower 92 also provides suction to the odorous gas entering the device, guiding it along a predetermined route.

[0027] Both the first spray pipe network 24 and the second spray pipe network 34 adopt a shaped structure, consisting of a main pipe and branch pipes; the second spray pipe network 34 passes through the biological filter area 3 and the pre-washing area 2 and connects to the first external water pump 28; the first spray pipe network 24 connects to the second external water pump 311; the first external water pump 28 and the second external water pump 311 are connected to the external water tank; the water in the first circulating water tank 21 and the second circulating water tank 31 can be recycled after treatment.

[0028] The outer shell is made of stainless steel with performance higher than 022Cr19Ni10, and the inner lining of the outer shell is made of glass fiber reinforced plastic; the first support grid 22, the second support grid 32 and the third support grid 41 are all made of glass fiber reinforced resin.

[0029] The activated carbon adsorption zone 4 has an activated carbon packing layer 42 with a thickness of 500-800 mm and a packing particle size of 3-5 mm.

[0030] The biological filter bed 33 is a composite biological packing material composed of volcanic rock, ceramsite and polyurethane foam in a 1:1:2 ratio.

[0031] The pre-washed packing layer 23 uses multi-faceted hollow sphere packing with a filling rate of 70-85%.

[0032] Under the action of the fan 92, the odorous gas to be treated enters the first gas distribution chamber 25 through the air inlet 11, and then enters the first gas collection chamber 26 after being treated by the pre-washing packing layer 23 and the first spray pipe network 24 in the pre-washing zone 2. Then, it enters the second gas distribution chamber 37 of the first biological filter 35 of the biological packing layer 33 through the first vent 6. It then passes through the biological packing layer 33 of the first biological filter 35 and the second biological filter 36 and the second spray pipe network 34 in sequence to complete biodegradation. Then, it enters the second gas collection chamber 38 of the second biological filter 36, and then passes through the cyclone demister 310 to remove moisture. It then enters the activated carbon adsorption zone 4 through the second vent. The activated carbon adsorption zone 4 moves from top to bottom and is treated by the activated carbon packing layer 42 before being discharged from the air outlet 9.

[0033] This invention relates to a crossflow biological deodorization device, employing a biological deodorization process. The pre-washing zone 2 uses a gas chamber and spray system to pre-treat odorous gases; the biological filter zone 3 is divided into two compartments to complete biodegradation and water removal; and the activated carbon adsorption zone 4 serves as the final stage of deodorization. The device features a horizontal layout and adjustable height. The outer shell is made of a composite material of stainless steel and fiberglass, combining corrosion resistance with structural strength. Through the combination of biological treatment and activated carbon adsorption, it achieves highly efficient deodorization without secondary pollution, making it suitable for height-restricted locations such as underground wastewater treatment plants.

[0034] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cross-flow biological deodorization device, characterized by: The shell (1) includes a rectangular parallelepiped structure, which is composed of a pre-washing zone (2), a biological filter zone (3), and an activated carbon adsorption zone (4) arranged in sequence and connected laterally. The pre-washing zone (2) and the biological filter zone (3) are separated by a first steel grating (5) and connected by a first ventilation hole (6); The biological filter zone (3) and the activated carbon adsorption zone (4) are separated by a second steel grating (7) and connected by a second ventilation hole (8); The pre-washing zone (2) is provided with a first circulating water tank (21), a first supporting grid (22), a pre-washing filler layer (23), and a first spray pipe network (24) from bottom to top; The biological filter area (3) is provided from bottom to top with a second circulating water tank (31), a second supporting grid (32), a biological packing layer (33), and a second spray pipe network (34); The activated carbon adsorption zone (4) is provided with a third support grid (41) and an activated carbon packing layer (42) from bottom to top. The bottom of the activated carbon adsorption zone (4) is connected to an outlet (9). The outlet (9) is connected in sequence to a gas valve (91), a fan (92) and a gas flow monitor (93).

2. The crossflow biological deodorization device according to claim 1, characterized by: The pre-washing zone (2) has two air chambers arranged opposite each other, namely the first air distribution chamber (25) and the first air collection chamber (26). The first air distribution chamber (25) and the first air collection chamber (26) are both formed by the first gas distributor (27) and the upper and lower steel plates. The first air distribution chamber (25) has an air inlet (11) on its outside that communicates with the pre-washing zone (2). The first vent (6) is located in the first air collection chamber (26). The bottom and top of the first vent (6) are flush with the bottom and top of the first gas distributor (27), respectively.

3. The crossflow biological deodorization device according to claim 2, characterized by: The biological filter area (3) includes a first biological filter grid (35) and a second biological filter grid (36) connected on one side. The first biological filter grid (35) is connected to the first gas collecting chamber (26) and a second gas distribution chamber (37) is provided on the side. The first ventilation hole (6) is connected to the second gas distribution chamber (37). The second biological filter grid (36) is connected to the second gas distribution chamber (37) and a second gas collecting chamber (38) is provided on the same side. The second gas distribution chamber (37) and the second gas collecting chamber (38) are both formed by a second gas distributor (39) and upper and lower steel plates. A cyclone demister (310) is provided on the upper part of the second gas collecting chamber (38). A second ventilation hole is provided on the upper part of the cyclone demister (310) and the second ventilation hole is connected to the upper part of the activated carbon adsorption area (4).

4. The crossflow biological deodorization device according to claim 1, characterized by: The first spray pipe network (24) and the second spray pipe network (34) are both set up with a shaped structure, consisting of a main pipe and a branch pipe; the second spray pipe network (34) runs through the biological filter area (3) and the pre-washing area (2) and connects to the first external water pump (28), and the first spray pipe network (24) connects to the second external water pump (311).

5. The crossflow biological deodorization device according to claim 1, characterized by: The activated carbon adsorption zone (4) has an activated carbon packing layer (42) with a thickness of 500-800 mm and a packing particle size of 3-5 mm.

6. The crossflow biological deodorization device according to claim 1, characterized by: The pre-washed packing layer (23) uses multi-faceted hollow sphere packing with a filling rate of 70-85%.

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