Biochemical sewage waste gas deodorization treatment device

Abstract

This utility model relates to the field of waste gas treatment technology, specifically a biochemical wastewater deodorization treatment device. It includes an absorption tower and an auxiliary tower. The auxiliary tower has a liquid inlet pipe at its top and an air inlet pipe at its bottom. An exhaust fan is located at the top of the auxiliary tower, and a gas guiding device is installed inside the auxiliary tower to slow down the gas's upward velocity. This utility model has a reasonable and compact structure and is easy to use. After the waste gas enters the auxiliary tower through the air inlet pipe, it spirals upward within the auxiliary tower under the guidance of the exhaust fan and the gas guiding device, thereby increasing the residence time of the waste gas in the auxiliary tower. Water is added to the auxiliary tower through the liquid inlet pipe, dissolving the odorous substances in the waste gas. The water containing the dissolved odorous substances is transported to the absorption tower through a pipeline and sprayed from a spray plate onto the adsorption device, further dissolving and absorbing the odorous substances in the waste gas, thus decomposing and transforming the odorous substances. It features stability, high efficiency, and excellent deodorization effect.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology and is a biochemical wastewater deodorization treatment device. Background Technology

[0002] Biological wastewater deodorization treatment systems are specifically designed to treat unpleasant odorous gases generated during wastewater treatment. These systems are primarily used in industrial sites such as wastewater treatment plants and chemical plants, where the treatment of large quantities of wastewater often produces exhaust gases containing harmful substances such as hydrogen sulfide, ammonia, and volatile organic compounds. These exhaust gases not only pollute the environment but also pose a threat to the health of nearby residents. Therefore, effective exhaust gas treatment technology is of paramount importance.

[0003] Common biological wastewater and waste gas treatment technologies include biofiltration, activated carbon adsorption, photocatalysis, and ozone oxidation. Each method has its own characteristics; some decompose harmful substances through the metabolic activities of microorganisms, while others remove odors using physical adsorption or chemical reactions. Each method has its applicable scope and limitations, and selecting the appropriate method requires consideration of factors such as the composition and concentration of the waste gas, as well as treatment costs.

[0004] In existing technologies, such as Chinese Patent CN218307232U, a bio-ball deodorization device for waste gas treatment is disclosed. This device simplifies and speeds up replacement by detachably and axially mounting the ball filter bed to the inner wall of the deodorization cylinder. Replacement is as simple as pulling out the entire deodorization cylinder with the old ball filter bed installed and inserting the new one, significantly reducing replacement time and improving the equipment's waste gas deodorization efficiency. However, this device also has limitations. It dissolves odorous substances in waste gas in water, then uses microorganisms to adsorb, absorb, and decompose them. However, the short residence time of the waste gas in the absorption tower affects the absorption efficiency of odorous substances, limiting the treatment effect. Therefore, extending the residence time of waste gas in the absorption tower and improving the absorption efficiency of odorous substances is a crucial problem that current biochemical wastewater deodorization treatment technologies need to address. Summary of the Invention

[0005] This invention provides a biochemical wastewater deodorization treatment device that overcomes the shortcomings of the prior art and can effectively solve the problem of low absorption efficiency of existing absorption towers.

[0006] The technical solution of this utility model is achieved through the following measures: A biochemical wastewater deodorization treatment device includes an absorption tower and an auxiliary tower. The auxiliary tower is equipped with a liquid inlet pipe and an air inlet pipe at the bottom. An exhaust fan located at the top of the auxiliary tower is installed inside the auxiliary tower. A gas guiding device that can slow down the gas rising speed is installed inside the auxiliary tower. A gas supply pipeline is fixedly connected between the air outlet at the top of the auxiliary tower and the air inlet at the bottom of the absorption tower. A spray plate located at the top of the absorption tower is installed inside the absorption tower. A liquid supply pipeline is fixedly connected between the liquid outlet at the bottom of the auxiliary tower and the inlet of the spray plate. A liquid supply pump is installed on the liquid supply pipeline. An exhaust pipe is installed at the top of the absorption tower. An exhaust pump is installed on the exhaust pipe. An adsorption device is installed inside the absorption tower.

[0007] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0008] The aforementioned inlet pipe may include a main inlet pipe, an annular inlet pipe, longitudinal branch pipes, and nozzles. An annular inlet pipe is provided on the outer side of the upper part of the auxiliary tower corresponding to the position below the exhaust fan. The main inlet pipe is fixedly connected to the outer side of the annular inlet pipe. Several longitudinal branch pipes are fixedly connected at intervals along the circumference on the lower side of the annular inlet pipe. Each longitudinal branch pipe is fixedly connected at intervals to a nozzle located inside the auxiliary tower on the side facing the auxiliary tower.

[0009] The aforementioned gas guiding device may include a fixed column and helical blades. A fixed column located below the exhaust fan and vertically upward is fixedly installed inside the auxiliary tower, and helical blades in a spiral upward shape are provided on the outside of the fixed column.

[0010] The aforementioned gas guiding device may also include elastic baffles. The spiral blades include a number of blade units arranged sequentially from top to bottom, and two elastic baffles are provided circumferentially on the outer side of the fixing column between each pair of adjacent blade units.

[0011] The aforementioned adsorption device may include several adsorption components arranged vertically and horizontally within the absorption tower. Each adsorption component includes an upper support mesh plate, adsorption balls, and a lower support mesh plate. The upper and lower support mesh plates are respectively installed together with corresponding positions inside the adsorption tower, and several adsorption balls are arranged between the upper and lower support mesh plates.

[0012] The aforementioned adsorption spheres can be used as suspended sphere biological packing materials.

[0013] The above may also include a gas distribution pipe. The bottom of the absorption tower is equipped with a gas distribution pipe, which is a ring-shaped pipe. Several gas outlet holes are evenly distributed along the circumference on the lower side of the gas distribution pipe, and the gas outlet end of the gas transmission pipeline is fixedly connected to the gas distribution pipe.

[0014] This utility model has a reasonable and compact structure and is easy to use. After the exhaust gas enters the auxiliary tower through the inlet pipe, it spirals upward in the auxiliary tower under the guidance of the exhaust fan and the gas guiding device, thereby increasing the residence time of the exhaust gas in the auxiliary tower. Water is added to the auxiliary tower through the liquid inlet pipe to dissolve the odorous substances in the exhaust gas. The water containing the dissolved odorous substances is transported to the absorption tower through the liquid delivery pipeline and sprayed out from the spray plate to the adsorption device, further dissolving and absorbing the odorous substances in the exhaust gas, thereby decomposing and transforming the odorous substances. It has the characteristics of stability, high efficiency and good deodorization effect. Attached Figure Description

[0015] Appendix Figure 1 This is a three-dimensional structural diagram of embodiments 1 to 6 of this utility model.

[0016] Appendix Figure 2 For the appendix Figure 1 Schematic diagram of the cross-sectional structure of the auxiliary tower.

[0017] Appendix Figure 3 For the appendix Figure 2 Schematic diagram of the gas guiding device.

[0018] Appendix Figure 4 For the appendix Figure 1 Enlarged schematic diagram of the main cross-section of the absorption tower.

[0019] Appendix Figure 5 For the appendix Figure 4 A three-dimensional structural diagram of the trachea.

[0020] The codes in the attached diagram are as follows: 1 is the absorption tower, 2 is the auxiliary tower, 3 is the air inlet pipe, 4 is the exhaust fan, 5 is the gas transmission pipeline, 6 is the spray plate, 7 is the liquid transmission pipeline, 8 is the liquid transmission pump, 9 is the exhaust pipe, 10 is the exhaust pump, 11 is the main liquid inlet pipe, 12 is the annular liquid inlet pipe, 13 is the longitudinal branch pipe, 14 is the nozzle, 15 is the spiral blade, 16 is the elastic baffle plate, 17 is the upper support mesh plate, 18 is the adsorption ball, 19 is the lower support mesh plate, 20 is the gas distribution pipe, and 21 is the gas outlet. Detailed Implementation

[0021] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0022] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0023] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0024] Example 1: As shown in the attached document Figure 1 , 2 As shown in Figures 3 and 4, the biochemical wastewater deodorization treatment device includes an absorption tower 1 and an auxiliary tower 2. The auxiliary tower 2 is equipped with a liquid inlet pipe and an air inlet pipe 3 at the bottom. An exhaust fan 4 located at the top of the auxiliary tower 2 is installed inside the auxiliary tower 2. A gas guiding device that can slow down the gas rising speed is installed inside the auxiliary tower 2. A gas supply pipeline 5 is fixedly connected between the air outlet at the top of the auxiliary tower 2 and the air inlet at the bottom of the absorption tower 1. A spray plate 6 located at the top of the absorption tower 1 is installed inside the absorption tower 1. A liquid supply pipeline 7 is fixedly connected between the liquid outlet at the bottom of the auxiliary tower 2 and the inlet of the spray plate 6. A liquid supply pump 8 is installed on the liquid supply pipeline 7. An exhaust pipe 9 is installed at the top of the absorption tower 1. An exhaust pump 10 is installed on the exhaust pipe 9. An adsorption device is installed inside the absorption tower 1. During operation, after the exhaust gas enters the auxiliary tower 2 through the inlet pipe 3, it spirals upward in the auxiliary tower 2 under the guidance of the exhaust fan 4 and the gas guiding device, thereby increasing the residence time of the exhaust gas in the auxiliary tower 2. Water is added to the auxiliary tower 2 through the liquid inlet pipe to dissolve the odorous substances in the exhaust gas. The water containing the dissolved odorous substances is transported to the absorption tower 1 through the liquid delivery pipeline 7 and sprayed out from the spray plate 6 to the adsorption device, further dissolving and absorbing the odorous substances in the exhaust gas, thereby decomposing and transforming the odorous substances. This application significantly improves the exhaust gas purification efficiency through the dual-tower (absorption tower 1-auxiliary tower 2) synergistic treatment mechanism, effectively solving the problem that the existing absorption tower 1 has a short residence time of exhaust gas in the absorption tower 1, which affects the absorption efficiency of odorous substances in the exhaust gas, thus limiting the treatment effect.

[0025] The above-mentioned biochemical wastewater and exhaust gas deodorization treatment device can be further optimized and / or improved according to actual needs:

[0026] Example 2: As shown in the attached document Figure 1 , 2As shown in Figures 3 and 4, the liquid inlet pipe includes a main liquid inlet pipe 11, an annular liquid inlet pipe 12, longitudinal branch pipes 13, and nozzles 14. The annular liquid inlet pipe 12 is provided on the outer side of the upper part of the auxiliary tower 2, which is located below the exhaust fan 4. The main liquid inlet pipe 11 is fixedly connected to the outer side of the annular liquid inlet pipe 12. Several longitudinal branch pipes 13 are fixedly connected to the lower side of the annular liquid inlet pipe 12 at intervals along the circumference. Each longitudinal branch pipe 13 is fixedly connected to a nozzle 14 located inside the auxiliary tower 2 at intervals on the side facing the auxiliary tower 2. During use, by configuring the inlet pipe into a structure of "main inlet pipe 11, annular inlet pipe 12, longitudinal branch pipe 13, and nozzle 14", multi-level distribution and directional spraying of the absorbent liquid can be achieved. The three-dimensional layout of the annular inlet pipe 12 and the longitudinal branch pipe 13 can form a gradient liquid film coverage along the waste gas flow path, effectively avoiding the problems of droplet aggregation or uneven distribution caused by traditional single-point spraying. The vertically spaced arrangement of the nozzles 14 facing the interior of the auxiliary tower 2, combined with the counter-current operation principle, allows the absorbent liquid to continuously form dynamic liquid mist during the spiral ascent of the waste gas. This not only prolongs the contact time between the gas and liquid phases but also enhances the diffusion efficiency of pollutant molecules through atomization. In addition, the modular assembly characteristics of the nozzles 14 make it easy to adjust the spray angle and atomization density according to the waste gas composition. The hydrophilic treatment layer on its surface works in synergy with the spiral path to dynamically adjust the liquid film thickness and reduce gas film resistance, ensuring the stability of purification efficiency under different concentrations of waste gas.

[0027] Example 3: As shown in the attached document Figure 1 , 2 As shown in Figures 3 and 4, the gas guiding device includes a fixed column and a spiral blade 15. A fixed column, located below the exhaust fan 4 and vertically upward, is fixedly installed inside the auxiliary tower 2. Spiral blades 15, spiraling upwards, are provided on the outer side of the fixed column. During operation, the spiral blades 15 inside the auxiliary tower 2 guide the exhaust gas upwards in a spiral motion, promoting thorough mixing and contact between the gas and liquid phases through fluid dynamics principles.

[0028] Example 4: As shown in the appendix Figure 1 , 2As shown in Figures 3 and 4, the gas guiding device also includes elastic baffles 16. The spiral blades 15 consist of several blade units arranged sequentially from top to bottom. Two elastic baffles 16 are spaced circumferentially on the outer side of the fixed column between every two adjacent blade units. During operation, by setting the elastic baffles 16 inside the spiral blades 15, the hydrodynamic force generated when the exhaust gas spirals upward drives the elastic baffles 16 to swing regularly, forming a dynamic gas-liquid interface. The elastic structure adopted by the elastic baffles 16 can effectively reduce the flow resistance of the exhaust gas during the swinging process, and can also break the surface tension of the gas-liquid interface through periodic disturbance, so that the odor gas molecules and water molecules can fully contact and accelerate the dissolution reaction. Compared with the static structure, the active swinging characteristics of the elastic baffles 16 can actively adjust the uniformity of exhaust gas distribution and avoid the formation of airflow dead zones inside the tower. At the same time, its flexible material can continuously optimize the gas-liquid contact efficiency through high-frequency micro-amplitude swinging.

[0029] Example 5: As shown in the attached document Figure 1 , 2 As shown in Figures 3 and 4, the adsorption device includes several adsorption components arranged vertically and horizontally within the absorption tower 1. Each adsorption component includes an upper support mesh plate 17, adsorption balls 18, and a lower support mesh plate 19. The upper and lower support mesh plates 17 and 19 are respectively installed at corresponding positions inside the adsorption tower, and several adsorption balls 18 are arranged between the upper and lower support mesh plates 17 and 19. During use, by setting the adsorption components to have a modular layout, it provides convenience for later maintenance, allowing for local replenishment or replacement of packing without shutting down the system, effectively maintaining the long-term stable operation of the treatment system.

[0030] Example 6: As shown in the appendix Figure 1 , 2As shown in Figures 3 and 4, the adsorption ball 18 is a suspended ball biological packing material. During use, setting the suspended ball biological packing material in the absorption tower 1 can significantly enhance the contact efficiency between waste gas and microorganisms. Its unique dynamic suspension structure enables the formation of a continuous microbial film layer on the surface of the packing material, which prolongs the effective residence time of pollutants in the treatment system through the synergistic effect of gas, liquid and solid phases. The suspended balls are in a natural rolling state driven by airflow, which not only avoids the defects of easy agglomeration and blockage of traditional fixed packing materials, but also realizes the continuous renewal and regeneration of the biological phase, making the degradation pathways of soluble odorous substances such as hydrogen sulfide and ammonia more diversified. This design, by optimizing the fluid dynamics distribution, promotes the formation of multi-stage turbulent circulation of waste gas in the tower, which enhances the mass transfer efficiency and biochemical reaction activity. Depending on the requirements, suspended ball biological packing is a well-known existing technology. It is mostly made of polypropylene (PP) or polyethylene (PE) and adopts a double-layer structure (the outer layer is a hollow fishnet and the inner layer is a rotating ball). The specific surface area can reach 700 m² / m³ (such as the CHQ-100S model). The biofilm carrier used has strong surface hydrophilicity, which makes it easy for microorganisms to attach and form a biofilm. It is suitable for biofilm wastewater treatment. It is lightweight and uniformly suspended in the liquid, which can effectively optimize the water flow distribution.

[0031] Example 7: As attached Figure 5 As shown, it may also include a gas distribution pipe 20. The gas distribution pipe 20 is located at the bottom of the absorption tower 1 and is a ring-shaped pipe. Several air outlets 21 are evenly distributed along the circumference of the lower side of the gas distribution pipe 20. The outlet end of the gas supply pipeline 5 is fixedly connected to the gas distribution pipe 20. During operation, the gas distribution pipe 20 at the outlet end of the gas supply pipeline 5 of the absorption tower 1 effectively optimizes the uniformity and stability of the waste gas distribution. Through multiple evenly distributed circumferential air outlets 21, it forms a diversion structure, transforming the concentrated airflow into a uniform diffusion mode and eliminating the turbulent vortex phenomenon of traditional direct-flow air intake.

[0032] The above technical features constitute the preferred embodiment of this utility model, which has strong adaptability and the best implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A biochemical wastewater and exhaust gas deodorization treatment device, characterized in that... The system includes an absorption tower and an auxiliary tower. The auxiliary tower is equipped with a liquid inlet pipe and a gas inlet pipe at the bottom. An exhaust fan is located at the top of the auxiliary tower, and a gas guiding device is installed inside the auxiliary tower to slow down the gas rise. A gas supply pipeline is fixedly connected between the gas outlet at the top of the auxiliary tower and the gas inlet at the bottom of the absorption tower. A spray plate is located at the top of the absorption tower, and a liquid supply pipeline is fixedly connected between the liquid outlet at the bottom of the auxiliary tower and the inlet of the spray plate. A liquid supply pump is installed on the liquid supply pipeline. An exhaust pipe is located at the top of the absorption tower, and an exhaust pump is installed on the exhaust pipe. An adsorption device is installed inside the absorption tower.

2. The biochemical sewage waste gas deodorization treatment device according to claim 1, characterized in that The liquid inlet pipe includes a main liquid inlet pipe, an annular liquid inlet pipe, longitudinal branch pipes, and nozzles. An annular liquid inlet pipe is provided on the outer side of the upper part of the auxiliary tower corresponding to the position below the exhaust fan. The main liquid inlet pipe is fixedly connected to the outer side of the annular liquid inlet pipe. Several longitudinal branch pipes are fixedly connected at intervals along the circumference on the lower side of the annular liquid inlet pipe. Each longitudinal branch pipe is fixedly connected at intervals to a nozzle located inside the auxiliary tower on the side facing the auxiliary tower.

3. The biochemical sewage waste gas deodorization treatment device according to claim 1 or 2, characterized in that The gas guiding device includes a fixed column and spiral blades. The fixed column is fixedly installed inside the auxiliary tower, located below the exhaust fan and arranged vertically upwards. Spiral blades in a spiral upward shape are provided on the outside of the fixed column.

4. The biochemical sewage waste gas deodorization treatment device according to claim 3, characterized in that The gas guiding device also includes elastic baffles. The helical blades include several blade units arranged continuously from top to bottom. Two elastic baffles are arranged circumferentially on the outside of the fixing column between each pair of adjacent blade units.

5. The biochemical sewage waste gas deodorization treatment device according to claim 1 or 2 or 4, characterized in that The adsorption device includes several adsorption components arranged vertically and horizontally within the absorption tower. Each adsorption component includes an upper support mesh plate, adsorption balls, and a lower support mesh plate. The upper and lower support mesh plates are installed together with corresponding positions inside the adsorption tower, and several adsorption balls are arranged between the upper and lower support mesh plates.

6. The biochemical sewage waste gas deodorization treatment device according to claim 3, characterized in that The adsorption device includes several adsorption components arranged vertically and horizontally within the absorption tower. Each adsorption component includes an upper support mesh plate, adsorption balls, and a lower support mesh plate. The upper and lower support mesh plates are installed together with corresponding positions inside the adsorption tower, and several adsorption balls are arranged between the upper and lower support mesh plates.

7. The biochemical wastewater and waste gas deodorization treatment device according to claim 5, characterized in that... Adsorption balls are suspended biological packing materials.

8. The biochemical sewage waste gas deodorization treatment device according to claim 6, characterized in that Adsorption balls are suspended biological packing materials.

9. The biochemical sewage waste gas deodorization treatment device according to claim 1 or 2 or 4 or 6 or 7 or 8, characterized in that It also includes a gas distribution pipe. The bottom of the absorption tower is equipped with a gas distribution pipe, which is a ring-shaped pipe. Several gas outlet holes are evenly distributed along the circumference on the lower side of the gas distribution pipe. The gas outlet end of the gas transmission pipeline is fixedly connected to the gas distribution pipe.

10. The biochemical sewage waste gas deodorization treatment device according to claim 5, characterized in that It also includes a gas distribution pipe. The bottom of the absorption tower is equipped with a gas distribution pipe, which is a ring-shaped pipe. Several gas outlet holes are evenly distributed along the circumference on the lower side of the gas distribution pipe. The gas outlet end of the gas transmission pipeline is fixedly connected to the gas distribution pipe.

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