A biological deodorization and aerobic tank combined deodorization system

Abstract

The present application relates to a kind of biological deodorization and the deodorization system of aerobic tank combination, including the biological deodorization device and aerobic tank being connected with each other, biological deodorization device includes odor washing tank, deodorization biological filter and demister, odor washing tank is L type, and including vertical air inlet portion and horizontal gas washing portion, the upper portion of air inlet portion is equipped with air inlet, and the lower portion of air inlet is equipped with wetted filler layer;Deodorization biological filter is located in the downstream side of air inlet portion, and is located above gas washing portion, and deodorization biological filter is equipped with at least activated carbon filler layer, polyurethane foam filler layer and volcanic rock support filler layer;Demister is located in the downstream side of deodorization biological filter, and is located above gas washing portion, and demister is equipped with air outlet above;The top of gas washing portion is equipped with horizontal grid plate, for supporting wetted filler layer, deodorization biological filter and demister;Odor washing tank is connected by pipeline the water inlet of aerobic tank, and the water outlet of aerobic tank is connected the spray pipe of biological deodorization device top.

Description

Technical Field

[0001] This invention belongs to the field of waste gas treatment technology, specifically relating to a deodorization system that combines biological deodorization with an aerobic tank. Background Technology

[0002] With the development of society and the economy, the country's requirements for environmental governance and residents' requirements for living environment are getting higher and higher. Odor generated during wastewater treatment and its treatment are receiving increasing attention. Commonly used deodorization processes include chemical absorption, physical deodorization, active oxygen ion deodorization, and biological deodorization. Chemical absorption uses chemical agents (NaOH, NaCl, or NaClO3) to absorb inorganic pollutants such as H2S and NH3 from odorous gases, but it has high operating costs and is not suitable for treating mixed gases. Physical deodorization involves adsorbing and removing odorous gases by passing them through an adsorbent-filled layer, but this method requires a large consumption of adsorbent during the deodorization process and is not suitable for treating high-concentration odorous gases. Active oxygen ion deodorization utilizes a special pulse discharge method of high-voltage electrostatics to generate a large amount of O2. 2－ O 2+ Active oxygen can oxidize and decompose malodorous gases into inorganic small molecules; at the same time, oxygen molecules in the air are excited to produce secondary active oxygen, which reacts with organic molecules in a series of chain reactions, but this method has too high an investment cost.

[0003] Biological deodorization is a relatively mature deodorization technology with advantages such as low investment, good deodorization effect, and low operating cost. Currently, the most mature method is biological filtration. However, existing biological filtration deodorization devices have the following problems: (1) the filter media is prone to collapse and blockage, resulting in low deodorization efficiency; (2) H2S, methanethiol, and some acidic substances in the odor will lower the pH value of the spray liquid, which will harm the microorganisms in the media; (3) the spray liquid is cold in winter, which is not conducive to the growth of microorganisms in the media. It is necessary to add heat preservation equipment and continuously replenish the nutrient solution in the media, which makes maintenance difficult and costly. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a deodorization system combining biological deodorization and an aerobic tank, comprising an interconnected biological deodorization device and an aerobic tank. The biological deodorization device includes an odor scrubbing tank, a deodorizing biological filter, and a demister. The odor scrubbing tank is L-shaped and includes a vertical air inlet and a horizontal air scrubbing section. An air inlet is provided at the upper part of the air inlet, and a wetting packing layer is provided below the air inlet for wetting the incoming odorous gas. The odorous gas enters the air scrubbing section for scrubbing.

[0005] The deodorizing biological filter is located downstream of the air inlet and above the air washing section. The deodorizing biological filter contains at least an activated carbon packing layer, a polyurethane foam packing layer, and a volcanic rock support packing layer to improve the odor filtration effect.

[0006] The demister is located downstream of the deodorizing biological filter and above the gas washing section. An air outlet is provided above the demister. Gas that has undergone biological deodorization and re-washing passes through the demister to remove water vapor from the gas.

[0007] The top of the air washing section is equipped with a horizontal grid plate to support the wetted packing layer, the deodorizing biological filter and the demister;

[0008] The odor scrubbing tank is connected to the inlet of the aerobic tank via a pipe, and the outlet of the aerobic tank is connected to the spray pipe at the top of the biological deodorization device.

[0009] Optionally, the biological deodorization device is divided into upper and lower parts by a horizontal grid plate. The lower part is a horizontal air washing section, and the upper part is arranged in sequence from the air inlet to the air outlet, including an air inlet, a deodorizing biological filter, and a demister. The top of the air inlet and the deodorizing biological filter is equipped with a spray pipe, which uses the wastewater from the aerobic tank as a spray liquid to spray and wet the packing layer and the deodorizing biological filter.

[0010] Optionally, the air inlet and the deodorizing biological filter are separated by a first partition, and the packing material of the wetted packing layer is Pall balls.

[0011] Optionally, the deodorizing biological filter includes, from top to bottom, a fruit shell activated carbon packing layer, a first pine bark packing layer, a first volcanic rock support packing layer, a polyurethane foam packing layer, a second volcanic rock support packing layer, a second pine bark packing layer, and a third volcanic rock support packing layer.

[0012] Optionally, the volcanic rock support filler layer is formed by the accumulation of mixed volcanic rock and limestone particles. The raw materials for preparing the mixed volcanic rock and limestone particles include vesicular basalt and limestone, with the vesicular basalt having a particle size of 10-15 mm and the limestone having a particle size of 0.5-1.0 mm, and the mass fraction of limestone being 1-3 wt%.

[0013] Optionally, the method for preparing the mixed volcanic rock and limestone particles includes the following steps:

[0014] (1) Add water to porous basalt and limestone and stir evenly to obtain a mixture with a water content of 10-15%.

[0015] (2) The mixture is fed into an extrusion device for granulation to obtain granules;

[0016] (4) The naturally cooled granules are fed into a kiln and calcined at 800-900℃ for 15-20 minutes. After natural cooling, the volcanic rock and limestone mixed granules are obtained with a particle size of 30-50 mm.

[0017] Optionally, the downstream end of the deodorizing biological filter is provided with a vertical second baffle. The top of the second baffle does not contact the top surface of the biological deodorizing device. The second baffle passes through the horizontal grid plate, and the bottom end of the second baffle is connected to the bottom surface of the air washing section.

[0018] The upstream side of the demister is provided with a third partition. The top of the third partition is connected to the top surface of the biological deodorization device, and the bottom of the third partition is connected to a horizontal grid plate. There is a certain gap between the third partition and the second partition.

[0019] Optionally, the second baffle divides the odor scrubbing tank into an upstream and a downstream section. Both sections are connected to the inlet of the aerobic tank via pipes, allowing the wastewater from the odor scrubbing tank to be discharged into the aerobic tank for circulation. The downstream section is connected to the outlet of the aerobic tank via pipes, enabling wastewater circulation in the downstream section.

[0020] To improve the treatment efficiency of the deodorizing biological filter, the length of the filter can be set relatively long, meaning a longer distance between the upstream and downstream sides. This may result in low utilization of the packing layer near the downstream side, causing odorous gas to be discharged along the top space of the filter after being filtered by the packing layer on the upstream side. Therefore, this invention provides a preferred solution.

[0021] Preferably, the deodorizing biological filter and the air washing section corresponding to the deodorizing biological filter are provided with a plurality of vertical partition plates, and the plurality of partition plates are evenly arranged along the length direction of the deodorizing biological filter.

[0022] The bottom end of the first partition plate, which is close to the first partition plate, is connected to the bottom surface of the air washing section, and the top end does not contact the top surface of the deodorizing biological filter. The top end of the second partition plate, which is adjacent to the first partition plate, is connected to the top surface of the deodorizing biological filter, and the bottom end does not contact the bottom surface of the air washing section.

[0023] The subsequent odd-numbered separators are set up in the same way as the first separator, and the even-numbered separators are set up in the same way as the second separator; the last separator closest to the second separator is an even-numbered separator.

[0024] The air scrubbing section between the two odd-numbered partition plates is isolated from the adjacent air scrubbing section and is connected to the inlet of the aerobic tank by a separate pipe.

[0025] Gas encounters less resistance when passing through the packing layer from bottom to top, and this also helps to loosen the packing layer upwards. However, the resistance is greater when gas passes through the packing layer from top to bottom, causing a larger accumulation of gas above the corresponding packing layer, creating a certain pressure. This pressure will cause the packing layers at that point to be compacted, affecting the biochemical filtration effect. Therefore, this invention provides the following preferred solution.

[0026] Preferably, the deodorizing biological filter and the air washing section corresponding to the deodorizing biological filter include several odd-numbered packing zones and even-numbered packing zones arranged in sequence at intervals, with an odd-numbered partition plate on the downstream side of the odd-numbered packing zone and an even-numbered partition plate on the downstream side of the even-numbered packing zone.

[0027] The transverse grid plate in the odd-numbered filling area includes, from top to bottom, a fruit shell activated carbon filling layer, a first pine bark filling layer, a first volcanic rock support filling layer, a polyurethane foam filling layer, a second volcanic rock support filling layer, a second pine bark filling layer, and a third volcanic rock support filling layer;

[0028] The even-numbered packing area is equipped with a rotating filter body, which includes a rotating shaft and several horizontal filter discs on the rotating shaft. The filter discs are filled with polyurethane foam packing, pine bark packing, and the mixed particles of volcanic rock and limestone for biochemical filtration of odor.

[0029] Further optionally, the rotating shaft of the rotating filter body is connected to the drive motor above the biological deodorization device. The rotating shaft passes through the horizontal grid plate and is rotatably connected to the bottom surface of the air washing section. Several filter discs are evenly arranged along the length of the rotating shaft, and the rotating shaft drives the filter discs to rotate.

[0030] The filter disc includes an outer mesh cage and an inner packing. The mesh cage is a flat cylindrical shape, and the inner packing is a uniformly mixed polyurethane foam packing, pine bark packing, and the mixed particles of volcanic rock and limestone. The packing volume is 70-85% of the total internal volume of the mesh cage.

[0031] Optionally, the mass ratio of the various fillers in the filter disc is the same as the mass ratio of the fillers in each filler layer in the odd-numbered filler zone. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a deodorization system that combines biological deodorization with an aerobic tank.

[0033] Figure 2 This is a schematic diagram of another biological deodorization device;

[0034] Figure 3 This is a schematic diagram of another biological deodorization device.

[0035] In the attached diagram, 1-Odor scrubbing tank, 2-Deodorizing biological filter, 3-Demister, 4-Aerobic tank, 5-Air inlet, 6-Air scrubbing section, 7-Air inlet, 8-Wetted packing layer, 9-Air outlet, 10-Horizontal grid plate, 11-Spray pipe, 12-First partition, 13-Second partition, 14-Third partition, 15-First dividing plate, 16-Second dividing plate, 17-Odd-numbered packing zone, 18-Even-numbered packing zone, 19-Rotating filter treatment body, 20-Rotating shaft, 21-Filter disc. Detailed Implementation

[0036] This invention provides a four-in-one deodorization system combining biological deodorization and aerobic tank, such as... Figures 1-3 As shown, it includes an interconnected biological deodorization device and an aerobic tank 4. The biological deodorization device includes an odor scrubbing tank 1, a deodorizing biological filter 2, and a demister 3. The odor scrubbing tank 1 is L-shaped and includes a vertical air inlet 5 and a horizontal air scrubbing section 6. The upper part of the air inlet 5 is provided with an air inlet 7, and the lower part of the air inlet 7 is provided with a wetting packing layer 8 for wetting the incoming odor. The odor enters the air scrubbing section 6 for air scrubbing.

[0037] The deodorizing biological filter 2 is located downstream of the air inlet 5 and above the air washing section 6. The deodorizing biological filter 2 is provided with at least an activated carbon packing layer, a polyurethane foam packing layer and a volcanic rock support packing layer to improve the odor filtration effect.

[0038] The demister 3 is located downstream of the deodorizing biological filter 2 and above the gas washing section 6. An air outlet 9 is provided above the demister 3. The gas that has undergone biological deodorization and re-washing passes through the demister 3 to remove water vapor from the gas.

[0039] The top of the air washing section 6 is provided with a horizontal grid plate 10 to support the wetted packing layer 8, the deodorizing biological filter 2 and the demister 3;

[0040] The odor scrubbing tank 1 is connected to the inlet of the aerobic tank 4 via a pipe, and the outlet of the aerobic tank 4 is connected to the spray pipe 11 at the top of the biological deodorization device.

[0041] Optionally, the biological deodorization device is divided into upper and lower parts by a horizontal grid plate 10. The lower part is a horizontal air washing section 6, and the upper part is arranged in sequence from the air inlet 7 to the air outlet 9, including the air inlet 5, the deodorizing biological filter 2, and the demister 3. The top of the air inlet 5 and the deodorizing biological filter 2 is equipped with a spray pipe 11, which uses the sewage from the aerobic tank 4 as the spray liquid to spray and wet the packing layer 8 and the deodorizing biological filter 2.

[0042] Optionally, the air inlet 5 and the deodorizing biological filter 2 are separated by a first partition 12. The packing material of the wetting packing layer 8 is Pall balls. The spray liquid is sprayed onto the Pall balls to fully wet them. The odorous gas entering through the air inlet 7 is blocked by the first partition 12 and passes through the wetting packing layer 8 from top to bottom. The surface and gaps of the Pall balls are initially wetted, and the airflow is rectified and made uniform.

[0043] Optionally, the outer diameter of the Pall balls is 25-50 mm, and the material is plastic, such as polypropylene; the filling height of the wetting filler layer 8 is 600-600 mm, and the bulk density is 56-91 kg / m³. 3 The preferred value is 56-71 kg / m³. 3 .

[0044] Optionally, the horizontal grid plate 10 includes upper and lower mesh plates, each mesh plate having a number of through holes evenly distributed. The through holes of the upper mesh plate are staggered with the through holes of the lower mesh plate, so that the horizontal grid plate 10 can play the role of uniform airflow.

[0045] Optionally, the deodorizing biological filter 2 includes, from top to bottom, a fruit shell activated carbon packing layer, a first pine bark packing layer, a first volcanic rock support packing layer, a polyurethane foam packing layer, a second volcanic rock support packing layer, a second pine bark packing layer, and a third volcanic rock support packing layer.

[0046] Optionally, the volcanic rock support filler layer is formed by the accumulation of mixed volcanic rock and limestone particles. The raw materials for preparing the mixed volcanic rock and limestone particles include vesicular basalt and limestone, with the vesicular basalt having a particle size of 10-15 mm and the limestone having a particle size of 0.5-1.0 mm, and the mass fraction of limestone being 1-3 wt%.

[0047] Optionally, the method for preparing the mixed volcanic rock and limestone particles includes the following steps:

[0048] (1) Add water to porous basalt and limestone and stir evenly to obtain a mixture with a water content of 10-15%.

[0049] (2) The mixture is fed into an extrusion device for granulation to obtain granules;

[0050] (4) The naturally cooled granules are fed into a kiln and calcined at 800-900℃ for 15-20 minutes. After natural cooling, the volcanic rock and limestone mixed granules are obtained with a particle size of 30-50 mm.

[0051] For example, the volcanic rock support filler layer is composed of a mixture of volcanic rock and limestone particles. The raw materials for preparing the volcanic rock and limestone mixture include vesicular basalt and limestone. The particle size of the vesicular basalt is 10-15 mm, the particle size of the limestone is 0.5-1.0 mm, and the mass fraction of the limestone is 1 wt%.

[0052] The method for preparing the volcanic rock and limestone mixed particles includes the following steps:

[0053] (1) Add water to porous basalt and limestone and stir evenly to obtain a mixture with a water content of 10%.

[0054] (2) The mixture is fed into an extrusion device for granulation to obtain granules;

[0055] (4) The naturally cooled granules are fed into a kiln and calcined at 900°C for 15 minutes. After natural cooling, the volcanic rock and limestone mixed granules are obtained with a particle size of 30-50 mm.

[0056] Further optionally, the particle size of the fruit shell activated carbon is 0.4-1.0 mm, and the thickness of the fruit shell activated carbon filler layer is 20-50 mm;

[0057] The thickness of both the first and second pine bark filler layers is 80-100mm, and the particle size of the pine bark filler is 30-50mm.

[0058] The thickness of the polyurethane foam filler layer is 90-100mm, and the particle size of the polyurethane foam filler is 20-50mm.

[0059] The deodorizing biological filter 2 of the present invention includes various packing layers. By spraying the sewage from the aerobic tank 4 onto each packing layer, each packing layer contains active microorganisms. While physically adsorbing pollutants in the odor, these microorganisms carry out biochemical reactions, consume the pollutants, and purify the gas.

[0060] The volcanic rock support packing layer is composed of a mixture of volcanic rock and limestone particles, possessing high strength and providing excellent support for other packing layers. This prevents the overall packing layer from collapsing and becoming clogged. Simultaneously, the porous basalt contains weakly magnetic substances, creating a weak magnetic field environment within the deodorizing biological filter 2. This magnetic field releases stronger far-infrared rays, stimulating enzyme activity within microorganisms and improving deodorization efficiency. The limestone pyrolysis produces calcium oxide, which generates heat upon contact with the spray liquid, producing calcium hydroxide. This forms a stable buffer system, preventing rapid pH changes caused by acidic substances in the odor entering the spray liquid, thus stabilizing the pH and protecting the microbial environment. The small amount of calcium oxide also provides a moderate amount of heat, raising the water temperature in winter. The three layers of volcanic rock support packing are spaced apart, ensuring the above effects are evenly distributed within the deodorizing biological filter 2.

[0061] The activated carbon from fruit shells and the filler from pine bark have a large specific surface area. The pores on the surface of pine bark are well-developed, which can meet the growth needs of various deodorizing microorganisms, resulting in good adsorption performance and the ability to fully absorb odorous substances. A small amount of biomass liquid dissolves from the surface of pine bark, providing abundant nutrients for microorganisms and promoting their survival.

[0062] Polyurethane foam filler has a high open-cell rate and water retention rate, which can provide a good living environment for microorganisms and give full play to the characteristics of biological deodorization.

[0063] Optionally, the downstream end of the deodorizing biological filter 2 is provided with a vertical second baffle 13. The top of the second baffle 13 does not contact the top surface of the biological deodorizing device. The second baffle 13 passes through the horizontal grid plate 10, and the bottom end of the second baffle 13 is connected to the bottom surface of the air washing section 6.

[0064] The upstream side of the demister 3 is provided with a third partition 14. The top of the third partition 14 is connected to the top surface of the biological deodorization device, and the bottom of the third partition 14 is connected to the horizontal grid plate 10. There is a certain gap between the third partition 14 and the second partition 13.

[0065] The odorous gas introduced through the air inlet 5 enters the air scrubbing section 6, which is the wastewater flowing into the air scrubbing section 6. Some soluble pollutants dissolve in the scrubbing section 6, and are then treated by microorganisms in the wastewater. The gas then rises through the horizontal grid plate 10 into the deodorizing biological filter 2, undergoing adsorption and biochemical treatment from bottom to top through each packing layer. After passing through the coconut shell activated carbon packing layer, the odorous gas flows at the top of the deodorizing biological filter 2, passing through the opening at the top of the second baffle 13. Due to the obstruction of the third baffle 14, the gas can only flow downwards, passing through the horizontal grid plate 10 and re-entering the wastewater in the air scrubbing section 6 for supplementary treatment. Finally, the gas rises, passes through the demister 3 for demisting, and is discharged through the air outlet 9, completing the treatment process.

[0066] Optionally, the second partition 13 divides the odor scrubbing tank 1 into an upstream side and a downstream side. Both sides are connected to the inlet of the aerobic tank 4 through pipes, so that the sewage from the odor scrubbing tank 1 is discharged into the aerobic tank 4 for circulation. The downstream side is connected to the outlet of the aerobic tank 4 through pipes to realize the circulation of sewage in the downstream side.

[0067] This invention connects the biological deodorization device to the aerobic tank 4, circulating the spray liquid, the sewage in the air washing section 6, and the mud-water mixture in the aerobic tank 4. On the one hand, this allows the bacteria on each packing layer of the deodorization biological filter 2 to eventually reach a balanced state. On the other hand, the temperature and nutrients of the sewage in the aerobic tank 4 can support the growth of microorganisms in each packing layer, and can also balance and replenish the microorganisms and nutrients in the air washing section 6. No additional heating equipment or nutrient solution is required, which saves energy, reduces consumption, and is easy to maintain.

[0068] Preferably, the deodorizing biological filter 2 and the air washing section 6 corresponding to the deodorizing biological filter 2 are provided with a plurality of vertical partition plates, and the plurality of partition plates are evenly arranged along the length direction of the deodorizing biological filter 2.

[0069] The bottom end of the first partition plate 15, which is close to the first partition plate 12, is connected to the bottom surface of the air washing section 6, and the top end does not contact the top surface of the deodorizing biological filter 2; the top end of the second partition plate 16, which is adjacent to the first partition plate 15, is connected to the top surface of the deodorizing biological filter 2, and the bottom end does not contact the bottom surface of the air washing section 6.

[0070] The subsequent odd-numbered separators are set in the same way as the first separator 15, and the even-numbered separators are set in the same way as the second separator 16; the last separator closest to the second separator 13 is an even-numbered separator.

[0071] The air washing section 6 between the two odd-numbered partition plates is isolated from the adjacent air washing section 6, and is provided with a separate pipe connected to the inlet of the aerobic tank 4.

[0072] The odorous gas input through the air inlet 7 first passes through the air inlet 5 and the air scrubbing section 6 in sequence. Then, the odorous gas is blocked by the first partition plate 15 and can only pass upward through the horizontal grid plate 10 and each packing layer of the deodorizing biological filter 2. It then passes through the top of the first partition plate 15 and flows downstream. It is then blocked by the second partition plate 16 and passes downward through each packing layer of the deodorizing biological filter 2 and the horizontal grid plate 10, enters the lower air scrubbing section 6, and then passes through the bottom of the second partition plate 16 and flows downstream. In this way, under the blocking effect of the partition plates, the gas flows back and forth between the deodorizing biological filter 2 and the corresponding air scrubbing section 6, so that the packing layers in the length direction of the deodorizing biological filter 2 can be fully utilized.

[0073] Preferably, the deodorizing biological filter 2 and the air washing section 6 corresponding to the deodorizing biological filter 2 include a plurality of odd-numbered packing zones 17 and even-numbered packing zones 18 arranged sequentially at intervals. The downstream side of the odd-numbered packing zone 17 is a partition plate with an odd number of positions, and the downstream side of the even-numbered packing zone 18 is a partition plate with an even number of positions. That is, they are arranged sequentially in the order of odd-numbered packing zone 17, even-numbered packing zone 18, odd-numbered packing zone 17, and even-numbered packing zone 18.

[0074] The top of the transverse grid plate 10 in the odd-numbered filling area 17 includes, from top to bottom, a fruit shell activated carbon filling layer, a first pine bark filling layer, a first volcanic rock support filling layer, a polyurethane foam filling layer, a second volcanic rock support filling layer, a second pine bark filling layer, and a third volcanic rock support filling layer.

[0075] The even-numbered packing area 18 is equipped with a rotating filter body 19, which includes a rotating shaft 20 and several horizontal filter discs 21 on the rotating shaft 20. The filter discs 21 are filled with polyurethane foam packing, pine bark packing and the mixed particles of volcanic rock and limestone, for biochemical filtration of odor.

[0076] Further optionally, the rotating shaft 20 of the rotating filter body 19 is connected to the drive motor above the biological deodorization device. The rotating shaft 20 passes through the horizontal grid plate 10 and is rotatably connected to the bottom surface of the air washing section 6. Several filter discs 21 are evenly arranged along the length of the rotating shaft 20, and the rotating shaft 20 drives the filter discs 21 to rotate.

[0077] The filter disc 21 includes an outer mesh cage and an inner packing. The mesh cage is a flat cylindrical shape, and the inner packing is a uniformly mixed polyurethane foam packing, pine bark packing, and the mixed particles of volcanic rock and limestone. The packing volume is 70-85% of the total internal volume of the mesh cage.

[0078] Optionally, the mass ratio of the various fillers in the filter disc 21 is the same as the mass ratio of the fillers in each filler layer in the odd-numbered filler zone 17.

[0079] The partitioning of the odd-numbered packing zone 17 and the even-numbered packing zone 18, as well as the different shapes of packing materials inside, are specifically designed for the operation of the deodorizing biological filter 2 and the gas washing section 6. Specifically, the packing layers in the odd-numbered packing zone 17 are laid out in a layered sequence, and the odorous gas passes through each packing layer from bottom to top for biochemical filtration. Due to the action of the spray liquid above, each packing layer is moistened and attached with microorganisms. In the even-numbered packing zone 18, the airflow direction is from top to bottom. The rotating shaft 20 drives several filter discs 21 to rotate. The gas passes through the mixed packing of each filter disc 21 in sequence for biological filtration. When the filter discs 21 in the gas washing section 6 rotate, they can not only fully agitate the sewage, sludge, and odor in the corresponding gas washing section 6 area, but also agitate the gas in the area above the horizontal grid plate 10, making the biological treatment more thorough. They can also act as carriers to load microorganisms, which can improve the stability of biological treatment. After running for a period of time, the machine can be stopped and the rotating shaft 20 can be inverted. This will cause the filter discs 21, which were previously in the sewage of the gas washing section 6, to reverse and be placed above the horizontal grid plate 10. They will continue to function under the moistening spray of the spray liquid. When the biofilm on the filter discs 21 is insufficient in carbon source and begins to partially die, the machine can be stopped and the rotating shaft 20 inverted again. During the repeated inversion process, the mixed packing in the filter discs 21 can also be loosened, preventing the packing from being compacted under gravity.

[0080] The aforementioned air scrubbing section 6 is divided into several independent chambers by various partition plates, and each chamber can be individually connected to the inlet of the aerobic tank.

Claims

1. A deodorization system combining biological deodorization and aerobic tank, characterized in that, It includes interconnected biological deodorization devices and aerobic tanks. The biological deodorization devices include an odor scrubbing tank, a deodorizing biological filter, and a demister. The odor scrubbing tank is L-shaped and includes a vertical air inlet and a horizontal air scrubbing section. The upper part of the air inlet is provided with an air inlet, and the lower part of the air inlet is provided with a wetted packing layer for wetting the incoming odor. The odor enters the air scrubbing section for scrubbing. The deodorizing biological filter is located downstream of the air inlet and above the air washing section. The demister is located downstream of the deodorizing biological filter and above the gas washing section. An air outlet is provided above the demister. Gas that has undergone biological deodorization and re-washing passes through the demister to remove water vapor from the gas. The top of the air washing section is equipped with a horizontal grid plate to support the wetted packing layer, the deodorizing biological filter and the demister; The odor scrubbing tank is connected to the inlet of the aerobic tank via a pipe, and the outlet of the aerobic tank is connected to the spray pipe at the top of the biological deodorization device. The air inlet and the deodorizing biological filter are separated by a first partition; a vertical second partition is provided at the downstream end of the deodorizing biological filter. The top of the second partition does not contact the top surface of the biological deodorizing device. The second partition passes through the horizontal grid plate, and the bottom of the second partition is connected to the bottom surface of the air washing section. The deodorizing biological filter and the corresponding air washing section are provided with several vertical partition plates, which are evenly arranged along the length of the deodorizing biological filter. The bottom end of the first partition plate, which is close to the first partition plate, is connected to the bottom surface of the air washing section, and the top end does not contact the top surface of the deodorizing biological filter. The top end of the second partition plate, which is adjacent to the first partition plate, is connected to the top surface of the deodorizing biological filter, and the bottom end does not contact the bottom surface of the air washing section. The subsequent odd-numbered separators are set up in the same way as the first separator, and the even-numbered separators are set up in the same way as the second separator; the last separator closest to the second separator is an even-numbered separator. The deodorizing biological filter and the corresponding air washing section include several odd-numbered packing zones and even-numbered packing zones arranged in sequence. The downstream side of the odd-numbered packing zone is a partition plate with an odd number of positions, and the downstream side of the even-numbered packing zone is a partition plate with an even number of positions. The top of the transverse grid plate in the odd-numbered filler area includes, from top to bottom, a nutshell activated carbon filler layer, a first pine bark filler layer, a first volcanic rock support filler layer, a polyurethane foam filler layer, a second volcanic rock support filler layer, a second pine bark filler layer, and a third volcanic rock support filler layer; the volcanic rock support filler layer is composed of a mixture of volcanic rock and limestone particles, and the raw materials for preparing the mixture of volcanic rock and limestone particles include porous basalt and limestone; The even-numbered packing area is equipped with a rotating filter body, which includes a rotating shaft and several horizontal filter discs on the rotating shaft. The filter discs are filled with polyurethane foam packing, pine bark packing and the mixed particles of volcanic rock and limestone, for biochemical filtration to treat odors. The rotating shaft passes through the horizontal grid plate and is rotatably connected to the bottom surface of the air washing section. Several filter discs are evenly arranged along the length of the rotating shaft, and the rotating shaft drives the filter discs to rotate.

2. The deodorization system combining biological deodorization and aerobic tank according to claim 1, characterized in that, The biological deodorization device is divided into upper and lower parts by a horizontal grid plate. The lower part is a horizontal air washing section, and the upper part is arranged in sequence from the air inlet to the air outlet, including an air inlet, a deodorizing biological filter, and a demister. The top of the air inlet and the deodorizing biological filter is equipped with a spray pipe, which uses the wastewater from the aerobic tank as a spray liquid to spray and wet the packing layer and the deodorizing biological filter.

3. The deodorization system combining biological deodorization and aerobic tank according to claim 1, characterized in that, The filler in the wetting filler layer is a Pall ball; The upstream side of the demister is provided with a third partition, the top of which is connected to the top surface of the biological deodorization device, and the bottom of which is connected to a horizontal grid plate.

4. The deodorization system combining biological deodorization and aerobic tank according to claim 1, characterized in that, The mass fraction of limestone in the raw material for preparing the volcanic rock and limestone mixed particles is 1-3 wt%.

5. The deodorization system combining biological deodorization and aerobic tank according to claim 1, characterized in that, The second baffle divides the odor scrubbing tank into an upstream and a downstream section. Both sections are connected to the inlet of the aerobic tank via pipes, allowing the wastewater from the odor scrubbing tank to be discharged into the aerobic tank for circulation. The downstream section is connected to the outlet of the aerobic tank via pipes, enabling wastewater circulation in the downstream section.

6. The deodorization system combining biological deodorization and aerobic tank according to claim 1, characterized in that, The air scrubbing section between the two odd-numbered partition plates is isolated from the adjacent air scrubbing section and is connected to the inlet of the aerobic tank by a separate pipe.

7. The deodorization system combining biological deodorization and aerobic tank according to claim 1, characterized in that, The rotating shaft of the rotating filter body is connected to the drive motor above the biological deodorization device; The filter disc includes an outer mesh cage and an inner packing. The mesh cage is a flat cylindrical shape, and the inner packing is a uniformly mixed polyurethane foam packing, pine bark packing, and the mixed particles of volcanic rock and limestone. The packing volume is 70-85% of the total internal volume of the mesh cage.

8. The deodorization system combining biological deodorization and aerobic tank according to claim 7, characterized in that, The mass ratio of the various fillers in the filter disc is the same as the mass ratio of the fillers in each filler layer in the odd-numbered filler zone.

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