Sewage station stink control device combined by multiple processes

Abstract

The utility model relates to the technical field of sewage treatment, and discloses a sewage station stink control device combined by multiple processes, which comprises a water scrubber, a demister, a humidifier, a biological filter, an ozone generator, a catalytic oxidation reactor and an adsorption box, and the bottom end of the water scrubber is fixedly connected with an air inlet. According to the sewage station stink control device combined by multiple processes, a filler layer consisting of a Pall ring and a Raschig ring in the water scrubber is matched with an integrated spray header, so that the gas-liquid contact area is increased, the mass transfer efficiency is improved, and soluble substances and peculiar smells are preliminarily removed; the circulating liquid storage tank circularly sprays liquid through a water pump, the liquid level and the pH value are adjusted in real time in combination with a liquid level controller and a pH value detector, and stable operation of the water washing tower is guaranteed; the baffle plates arranged in a staggered manner in the demister collide to condense liquid drops and discharge the liquid drops through a liquid outlet pipe, so that subsequent equipment is effectively prevented from being blocked; and the humidifier provides proper humidity for the biological filter.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an odor control device for wastewater treatment plants that combines multiple processes. Background Technology

[0002] The hospital wastewater treatment plant uses an integrated waste gas collection, disinfection, sterilization, and deodorization device. This integrated device adopts an integrated design of "closed collection + multi-stage purification and sterilization + intelligent control," combining physical, chemical, and biological technologies to efficiently treat waste gas containing pathogenic microorganisms (such as the novel coronavirus), malodorous gases (such as hydrogen sulfide and ammonia), and volatile organic compounds (VOCs). Through the efficient synergy of multiple technologies, it balances environmental safety and economic benefits, and is a key facility for the hospital wastewater treatment plant to achieve compliant waste gas emissions and epidemic prevention and control.

[0003] However, existing odor control methods for wastewater treatment plants mainly include single or simple combinations of physical, chemical, and biological processes. Physical methods, such as adsorption and absorption, can remove odorous gases to some extent, but they suffer from problems such as the need for regular replacement of adsorbents or absorbents and high treatment costs. Chemical methods, such as chemical washing and oxidation, may generate secondary pollution and have limited effectiveness in removing certain recalcitrant odor components. Biological methods, while having advantages such as better treatment effects and relatively low operating costs, are susceptible to inhibition of microbial activity under high concentrations of odorous gases, leading to a decrease in treatment efficiency.

[0004] Therefore, it is necessary to propose an odor control device for wastewater treatment plants that combines multiple processes. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a wastewater treatment plant odor control device that combines multiple processes, which has the advantages of high treatment efficiency, stable operation, and no secondary pollution, thus solving the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: an odor control device for wastewater treatment plants using a combination of multiple processes, including a water scrubbing tower, a demister, a humidifier, a biological filter, an ozone generator, a catalytic oxidation reactor, and an adsorption box. The bottom of the water scrubbing tower is fixedly connected to an air inlet. The top input end of the water scrubbing tower is connected to the discharge end of the demister via a pipe. The input end of the humidifier is connected to the discharge end of the demister via a pipe. The bottom of the humidifier is fixedly connected to a water tank. The discharge end of the humidifier is connected to the input end of the biological filter. The discharge end of the biological filter is connected to the input end of the ozone generator via a pipe. The ozone generator is connected to the catalytic oxidation reactor. The discharge end of the catalytic oxidation reactor is fixedly connected to the input end of the adsorption box. The top of the adsorption box is fixedly connected to an exhaust pipe.

[0007] Preferably, the interior of the water washing tower is provided with a packing layer, which consists of Pall rings and Raschig rings. The porosity of the Pall rings and Raschig rings in the packing layer is 85%-95%, the height of the packing layer is 1.5-2.5m, and the volume ratio of Pall rings to Raschig rings is 1:1 to 2:1. An integrated spray head is fixedly connected to the top wall of the water washing tower.

[0008] Preferably, a circulating storage tank is fixedly connected to the bottom of the water washing tower, and a water pump is installed inside the circulating storage tank. The water pump is connected to the integrated spray head through a pipeline.

[0009] Preferably, a liquid level controller and a pH meter are fixedly installed on the inner wall of the circulating liquid storage tank, and a feed inlet is fixedly connected to the top of the circulating liquid storage tank.

[0010] Preferably, the demister has several baffles fixedly connected inside, and the baffles are arranged in an inclined and staggered manner. The bottom end of the demister is fixedly connected to a liquid outlet pipe.

[0011] Preferably, the interior of the biofilter is filled with biological packing material, including a mixed porous medium of volcanic rock, ceramsite, and wood chips, and a ventilation pipe and a drainage pipe are fixedly connected to the bottom of the biofilter.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This wastewater treatment plant odor control device, combining multiple processes, utilizes a water scrubbing tower with a packing layer of Pall rings and Raschig rings integrated with spray heads to increase the gas-liquid contact area and mass transfer efficiency, initially removing soluble substances and odors. A circulating storage tank circulates the spray liquid via a pump, with a level controller and pH meter used to adjust the liquid level and pH in real time, ensuring stable operation of the water scrubbing tower. In the demister, staggered baffles collide and condense droplets, which are then discharged through the outlet pipe, effectively preventing blockage of subsequent equipment. A humidifier provides suitable humidity for the biological filter, and its internal ventilation and drainage pipes, made of a mixture of volcanic rock, ceramsite, and sawdust, promote microbial metabolism and decompose odor components. An ozone generator and catalytic oxidation reactor deeply purify residual organic matter through strong oxidation, and a final adsorption box adsorbs and treats the exhaust gas to ensure compliance with emission standards. Each unit is compact, operates stably, and has low maintenance costs, offering comprehensive benefits of high-efficiency treatment, resource conservation, and environmental friendliness. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the water washing tower of this utility model;

[0017] Figure 3 This is a cross-sectional structural diagram of the demister of this utility model.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 100. Water washing tower; 101. Integrated spray head; 102. Packing layer; 103. Air inlet;

[0020] 200. Circulating storage tank; 201. Feed inlet; 202. Liquid level controller; 203. Water pump; 204. pH meter;

[0021] 300. Demister; 301. Baffle plate; 302. Liquid outlet pipe;

[0022] 400. Humidifier; 401. Water tank;

[0023] 500. Biological filter; 501. Ventilation pipe; 502. Drainage pipe;

[0024] 600. Ozone generator; 601. Catalytic oxidation reactor;

[0025] 700, adsorption box; 701, exhaust pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figures 1-3As shown, a wastewater treatment plant odor control device combining multiple processes includes a water scrubbing tower 100, a demister 300, a humidifier 400, a biological filter 500, an ozone generator 600, a catalytic oxidation reactor 601, and an adsorption tank 700. An air inlet 103 is fixedly connected to the bottom of the water scrubbing tower 100. The top input end of the water scrubbing tower 100 is connected to the discharge end of the demister 300 via a pipe. The input end of the humidifier 400 is connected to the discharge end of the demister 300 via a pipe. A water tank 401 is fixedly connected to the bottom of the humidifier 400. The discharge end of the humidifier 400 is connected to the input end of the biological filter 500. The biological filter 500 is connected to the ozone generator 600 via a pipe. The ozone generator 600 is connected to the catalytic oxidation reactor 601. The discharge end of the catalytic oxidation reactor 601 is fixedly connected to the input end of the adsorption box 700. An exhaust pipe 701 is fixedly connected to the top of the adsorption box 700. This device uses a combination of processes. Through the synergistic effect of the water washing tower 100, demister 300, humidifier 400, biological filter 500, ozone generator 600, catalytic oxidation reactor 601 and adsorption box 700, it achieves efficient treatment of odorous gases from the sewage treatment plant. The water scrubbing tower 100 can initially remove soluble substances and some odors from the gas; the demister 300 effectively removes liquid droplets from the gas, preventing blockage and corrosion of subsequent equipment; the humidifier 400 provides a suitable humidity environment for subsequent biological treatment; the biofilter 500 utilizes the metabolic activity of microorganisms to further decompose odorous substances; the ozone generator 600 produces ozone with strong oxidizing properties, which can deeply oxidize residual organic matter and odors; the catalytic oxidation reactor 601 promotes the oxidation reaction at normal temperature and pressure, improving treatment efficiency; finally, the adsorbent in the adsorption tank 700 deeply purifies the exhaust gas, ensuring that emissions meet standards. The process units are connected sequentially, resulting in a compact structure and high treatment efficiency. This effectively solves the problem of odorous gas emissions from wastewater treatment plants, reduces pollution to the surrounding environment, and ensures stable operation and low maintenance costs, resulting in good economic and environmental benefits.

[0028] More preferably, the interior of the water washing tower 100 is provided with a packing layer 102, which consists of Pall rings and Raschig rings. The porosity of the Pall rings and Raschig rings in the packing layer 102 is 85%-95%, the height of the packing layer is 1.5-2.5m, and the volume ratio of Pall rings to Raschig rings is 1:1 to 2:1. An integrated spray head 101 is fixedly connected to the top wall of the water washing tower 100. The packing layer 102 composed of Pall rings and Raschig rings, along with the integrated spray head 101, inside the water washing tower 100 increases the contact area and contact time between the gas and liquid, allowing the spray liquid to fully wet the surface of the packing and form a uniform liquid film. When odorous gas passes through the packing layer 102, the liquid film comes into full contact with the gas, greatly improving the absorption efficiency of odorous components. At the same time, the special structure of the Pall rings and Raschig rings helps the gas diffusion and turbulence, further enhancing the mass transfer process. This more effectively removes impurities and odors from the gas, improves the treatment effect of the water scrubbing tower 100 on odorous gas, reduces the load on subsequent treatment processes, and ensures the efficient operation of the entire odor control device.

[0029] In a further preferred embodiment, a circulating storage tank 200 is fixedly connected to the bottom of the water scrubbing tower 100. A water pump 203 is installed inside the circulating storage tank 200, and the water pump 203 is connected to the integrated spray head 101 via a pipeline. By connecting the circulating storage tank 200 to the bottom of the water scrubbing tower 100 and installing the water pump 203 within the circulating storage tank 200 connected to the integrated spray head 101, the recycling of the spray liquid is achieved. This design not only saves water resources and reduces operating costs but also ensures stable flow and pressure of the spray liquid, enabling the integrated spray head 101 to continuously and uniformly spray liquid, thus guaranteeing the water scrubbing tower 100's effectiveness in treating odorous gases. Simultaneously, a stable supply of spray liquid helps maintain stable reaction conditions within the water scrubbing tower 100, reducing potential problems such as decreased treatment efficiency due to fluctuations in the spray liquid, improving the overall stability and reliability of the device, and facilitating long-term stable control of odorous gas emissions from the wastewater treatment plant.

[0030] Preferably, a level controller 202 and a pH meter 204 are fixedly installed on the inner wall of the circulating storage tank 200, and an inlet 201 is fixedly connected to the top of the circulating storage tank 200. Installing the level controller 202 and pH meter 204 inside the circulating storage tank 200, and providing the inlet 201, allows for real-time monitoring and adjustment of the spray liquid level and pH within the circulating storage tank 200. The level controller 202 ensures that the spray liquid is maintained at a suitable level, guaranteeing the normal operation of the water pump 203 and the normal supply of spray liquid. The pH meter 204 facilitates timely detection of abnormal changes in the pH of the spray liquid, and pH-adjusting agents or fresh spray liquid can be added as needed through the inlet 201, ensuring that the spray liquid is always maintained within a suitable pH range. This helps maintain a stable chemical reaction environment within the water scrubbing tower 100, ensuring effective absorption and treatment of different components in odorous gases, extending the service life of the spray liquid, improving the overall treatment effect and operating efficiency of the device for odorous gases, and reducing problems such as decreased treatment capacity and equipment corrosion caused by unsuitable acidity or alkalinity of the spray liquid.

[0031] In a further preferred embodiment, the demister 300 has several baffles 301 fixedly connected internally, arranged at an angle and staggered. A liquid outlet pipe 302 is fixedly connected to the bottom of the demister 300. The arrangement of several angled, staggered baffles 301 inside the demister 300 creates a tortuous flow path for the gas as it passes through, increasing the collision opportunities and contact time between the gas and the baffles 301, thereby improving demisting efficiency. During the collision with the baffles 301, droplets are more likely to agglomerate into larger droplets and fall to the bottom of the demister 300 under gravity, ultimately being discharged through the liquid outlet pipe 302. This highly efficient demisting design effectively removes droplets entrained in the gas, preventing them from entering subsequent equipment and causing blockages or corrosion, ensuring the normal operation of subsequent treatment equipment, improving the stability and reliability of the entire odor control device, and also helping to improve the quality of the treated gas and reduce the risk of secondary pollution from droplet emissions.

[0032] In a further preferred embodiment, the biofilter 500 is internally filled with biological packing material, including a mixed porous medium of volcanic rock, ceramsite, and sawdust. A ventilation pipe 501 and a drainage pipe 502 are fixedly connected to the bottom of the biofilter 500. The porous medium, composed of volcanic rock, ceramsite, and sawdust, serves as the biological packing material, possessing advantages such as large specific surface area, high porosity, and good air permeability and water permeability. Volcanic rock and ceramsite provide a large specific surface area and a certain mechanical strength, while sawdust increases the porosity and biological adhesion of the packing material, providing a favorable habitat for microbial growth and reproduction. The porous medium can adsorb and immobilize a large number of microorganisms. When malodorous gases pass through the biofilter 500, the microorganisms fully contact the gases on the surface of the packing material, utilizing the malodorous substances as nutrients for metabolic activities, decomposing them into harmless or low-harm substances. This biological treatment method can efficiently remove various complex malodorous components, achieving good treatment results with relatively low operating costs. Meanwhile, the design of the ventilation pipe 501 and drainage pipe 502 of the packing material ensures good ventilation inside the biological filter 500, avoids the generation of anaerobic environment, is conducive to the normal metabolism of microorganisms, ensures that the biological filter 500 can play its odor treatment function in a long-term and stable manner, and effectively improves the ambient air quality around the sewage treatment plant.

[0033] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sewage station odor control device combined with a plurality of processes, comprising a water washing tower (100), a mist eliminator (300), a humidifier (400), a biological filter (500), an ozone generator (600), a catalytic oxidation reactor (601), and an adsorption tank (700), characterized in that: The bottom end of the water washing tower (100) is fixedly connected with an air inlet (103), the top end input end of the water washing tower (100) is connected with the discharge end of a demister (300) through a pipeline, the input end of a humidifier (400) is connected with the discharge end of the demister (300) through a pipeline, the bottom end of the humidifier (400) is fixedly connected with a water tank (401), the discharge end of the humidifier (400) is connected with the input end of a biological filter tank (500), the discharge end of the biological filter tank (500) is connected with the input end of an ozone generator (600) through a pipeline, the ozone generator (600) is connected with a catalytic oxidation reactor (601), the discharge end of the catalytic oxidation reactor (601) is fixedly connected with the input end of an adsorption tank (700), and the top end of the adsorption tank (700) is fixedly connected with an exhaust pipe (701).

2. A sewage station odor control device using a combination of various processes according to claim 1, characterized in that: The inside of the water washing tower (100) is provided with a filler layer (102), the filler layer (102) is a Pall ring and a Raschig ring, the porosity of the Pall ring and the Raschig ring in the filler layer (102) is 85%-95%, the filler layer height is 1.5-2.5m, the volume ratio of the Pall ring to the Raschig ring is 1:1 to 2:1, and the top wall of the water washing tower (100) is fixedly connected with an integrated spray head (101).

3. A sewage station odor control device using a combination of various processes according to claim 2, characterized in that: The bottom end of the water washing tower (100) is fixedly connected with a circulating liquid storage tank (200), the inside of the circulating liquid storage tank (200) is provided with a water pump (203), and the water pump (203) is connected with the integrated spray head (101) through a pipeline.

4. A sewage station odor control device using a combination of various processes according to claim 3, characterized in that: The inner wall of the circulating liquid storage tank (200) is fixedly installed with a liquid level controller (202) and a pH detector (204), and the top end of the circulating liquid storage tank (200) is fixedly connected with a feed inlet (201).

5. A sewage station odor control device using a combination of various processes according to claim 1, characterized in that: The inside of the demister (300) is fixedly connected with a plurality of baffle plates (301), the plurality of baffle plates (301) are obliquely and staggeredly arranged, and the bottom end of the demister (300) is fixedly connected with a liquid outlet pipe (302).

6. A sewage station odor control device using a combination of various processes according to claim 1, characterized in that: The inside of the biological filter tank (500) is filled with biological filler, including mixed porous media of volcanic rock, ceramic particles and sawdust, and the bottom end of the biological filter tank (500) is fixedly connected with a ventilation pipe (501) and a drain pipe (502).

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