Organic polymer wastewater treatment system and treatment method

Abstract

The application relates to the technical field of sewage treatment, and discloses an organic polymer sewage treatment system and a treatment method, which comprise: a gas floatation tank, a filtering mechanism, a first treatment tank and a second treatment tank; the water inlets of the gas floatation tank are used for being communicated with raw water pipes and compressed gas pipes; the water outlet of the gas floatation tank is communicated with a first pump body; the water inlet of the filtering mechanism is communicated with the first pump body; the filtering mechanism is provided with a clean water outlet and a sewage outlet; the sewage outlet is communicated with a second pump body; the water inlet of the first treatment tank is communicated with the second pump body; the water inlet of the first treatment tank is also communicated with an ozone generator; the water outlet of the first treatment tank is communicated with a third pump body; the first exhaust port of the first treatment tank is used for being communicated with a tail gas treatment device; the water inlet of the second treatment tank is communicated with the third pump body; the water outlet of the second treatment tank is communicated with a water storage tank; and the cascade reaction of "chemical wall breaking + biological conversion" realizes thorough degradation of stubborn pollutants.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and specifically to an organic polymer wastewater treatment system and method. Background Technology

[0002] With the rapid development of industries such as papermaking, textiles, and chemicals, the wastewater discharged contains a large amount of recalcitrant organic polymers, such as lignin and synthetic fibers. These substances have stable molecular structures and complex compositions, making them difficult to effectively degrade using traditional physical precipitation or biochemical treatment methods. This results in substandard wastewater treatment and persistent environmental pollution.

[0003] Currently, common treatment technologies for this type of high-concentration, recalcitrant organic wastewater have significant limitations:

[0004] Single chemical oxidation methods (such as ozone oxidation): Ozone can effectively destroy the molecular structure of organic matter, but when used alone, it often randomly breaks down large organic molecules into a series of small molecule intermediates, making complete mineralization difficult and costly. For complex polymers such as lignin, the chemical oxygen demand (COD) of the effluent after ozone oxidation remains high.

[0005] Single anaerobic biological method: Anaerobic microorganisms have a slow and inefficient direct degradation rate of natural high molecular polymers such as lignin. Due to the lack of effective decomposition enzyme system, the hydraulic retention time is very long, the treatment facilities are huge, and the effluent is difficult to consistently meet the standards. Summary of the Invention

[0006] This application provides an organic polymer wastewater treatment system and method, which aims to solve the above-mentioned problems.

[0007] In one embodiment, an organic polymer wastewater treatment system is provided, comprising:

[0008] The air flotation tank has an inlet that is connected to a raw water pipe and a compressed air pipe; the outlet of the air flotation tank is connected to a first pump body.

[0009] The filter mechanism has an inlet connected to the first pump body; the filter mechanism has a clean water outlet and a wastewater outlet; the wastewater outlet is connected to a second pump body.

[0010] The first treatment tank has its inlet connected to the second pump body; the inlet of the first treatment tank is also connected to an ozone generator; the outlet of the first treatment tank is connected to a third pump body; and the first exhaust port of the first treatment tank is connected to an exhaust gas treatment device.

[0011] The second treatment tank has its inlet connected to the third pump body; its outlet is connected to a water storage tank; and its second exhaust port is connected to a gas recovery device.

[0012] The purified water outlet is connected to the water storage tank; the water storage tank is connected to the first pump body.

[0013] The purified water outlet is connected to the water storage tank via a centrifugal pump. The direction of water flow is changed by the forward and reverse rotation of the centrifugal pump. When the centrifugal pump reverses, it performs backwashing of the filtration mechanism, thereby improving the filtration efficiency of the filtration mechanism.

[0014] In one embodiment, the top of the flotation tank is provided with a scraping mechanism for removing scum from the surface of the raw water in the flotation tank; a collection trough for receiving scum is fixed on the outer wall of the flotation tank; the collection trough is located below the discharge port of the scraping mechanism.

[0015] Specifically, the scraping mechanism includes a conveyor belt with multiple scrapers fixedly connected to it. The multiple scrapers are spaced apart along the extension direction of the conveyor belt. The conveyor belt is fixedly installed on the top of the flotation tank, and a portion of the scrapers extends below the water surface.

[0016] The scum collected in the tank is transferred to corresponding processing equipment and processed into fuel for recycling. This also reduces the processing load on the treatment system.

[0017] In one embodiment, the bottom of the flotation tank is provided with a sludge discharge port, which is connected to a mixing tank via a submersible pump; the outlet of the mixing tank is connected to a hydrocyclone via a fourth pump body; the clean water outlet of the hydrocyclone is connected to the inlet of the first pump body; and the sludge discharge outlet of the hydrocyclone is connected to a sludge collection tank.

[0018] The bottom of the flotation tank is sloped, with the lowest point of the slope at the sludge discharge outlet. A water storage tank is connected to the mixing tank via a water pump to replenish the mixing tank. Both the mixing tank and the hydrocyclone are commercially available. The mixing tank is used to thoroughly mix the sludge, preventing it from settling to the bottom, while the hydrocyclone is used to separate organic matter such as lignin from large particulate impurities such as silt.

[0019] The lignin content in the sludge collection tank is very low, meeting the discharge standards. The sludge in the sludge collection tank mainly consists of large particulate impurities, and staff need to clean the sludge regularly and transfer it to the next stage of treatment.

[0020] In one embodiment, the filtration mechanism includes a filter and a filter tank, wherein the inlet of the filter is connected to the first pump body, and the outlet of the filter is connected to the inlet of the filter tank; the filter tank has a clean water outlet and a wastewater outlet.

[0021] Specifically, the filter is a commercially available bag filter, which uses a filter bag with a specific mesh size for filtration. This filter bag needs to be cleaned regularly, and impurities are then introduced into a mixing tank for further separation. The filter bag can block larger particles of impurities, but it cannot intercept lignin.

[0022] In one embodiment, the filtration tank includes a tank body, a filter screen, a cover plate, a lifting rod with a rack and pinion, a ring plate, a drive motor, and a drive rod with gears; the filter screen is disposed in the tank body, dividing the tank body into a sewage zone and a clean water zone; the clean water outlet and the sewage outlet are respectively connected to the clean water zone and the sewage zone in a one-to-one correspondence.

[0023] The cover plate is fixedly mounted on the pool body, and the cover plate has holes for the lifting rod to pass through; the end of the lifting rod located inside the pool body is fixedly connected to the ring plate; the ring plate abuts against the filter screen plate, and the ring plate can slide on the filter screen plate; the ring plate is located within the sewage zone; the lifting rod and the drive rod are connected by a gear and rack; the drive rod is rotatably connected to the cover plate; the gear of the drive rod is connected to the output end of the drive motor; the drive motor is fixedly connected to the cover plate.

[0024] In one embodiment, there are multiple filter screens, lifting rods, and ring plates; a support plate is fixedly connected to the lower part of the pool; multiple through holes are provided on the support plate; multiple filter screens are fixedly connected and surround the through holes along the edges of the through holes; the support plate and multiple filter screens together divide the pool into the sewage area and the clean water area; multiple ring plates are distributed sequentially at intervals, and each filter screen abuts against a corresponding ring plate.

[0025] Specifically, the multiple filters are spaced apart to create an S-shaped flow channel, increasing the water flow time, making full use of the pool space, and improving the filtration effect.

[0026] The support plate is inclined, with the lowest point on the support plate being the wastewater outlet. The ring plate draws impurities scraped off the filter screen from the wastewater outlet into the first treatment tank for centralized processing.

[0027] In one embodiment, an aeration disc is fixedly connected to the lower part of the first treatment tank, and the aeration disc is connected to the inlet of the first treatment tank; a packing layer is located above the aeration disc; the packing layer is fixedly connected to the inner wall of the first treatment tank; the top of the first treatment tank is the first exhaust port, and the outlet of the first treatment tank is located above the packing layer.

[0028] Specifically, the sludge discharge port of the first treatment tank is connected to the mixing tank via a first pipe. The sludge discharge port of the second treatment tank is connected to the mixing tank via a second pipe.

[0029] Aeration discs are available on the market.

[0030] The bottom packing layer of the first treatment tank is filled with packing materials of different properties or different catalytic activities from bottom to top. The packing materials are stacked on a plate with multiple holes in sequence, and the plate is fixedly connected to the inner wall of the first treatment tank.

[0031] The lower layer is filled with a catalyst with large pore size and high adsorption capacity (such as a catalyst supported on macroporous activated alumina). Its main function is to adsorb large organic molecules (such as lignin) and carry out preliminary cracking.

[0032] The upper layer is filled with a catalyst with high catalytic activity but small pore size (such as TiO2 / MnO2 honeycomb ceramic), which is responsible for the deep oxidation of small molecule intermediates generated by the cracking of the lower layer.

[0033] In one embodiment, a water distribution plate is fixedly connected to the lower part of the second treatment tank, and the water distribution plate is connected to the water inlet of the second treatment tank; above the water distribution plate are multiple mudguards, each fixedly connected to the inner wall of the second treatment tank, and the multiple mudguards are staggered and spaced apart; the water outlet of the second treatment tank is located above the mudguards; the top of the second treatment tank is the second exhaust port.

[0034] Specifically, the gas recovery device is a commercially available gas storage tank used to store the biogas emitted from the second exhaust port. The structure of the water distribution plate is the same as that of the aeration plate, and both are readily available on the market.

[0035] In one embodiment, the mudguard has a V-shaped cross-section, and an air collection hole is provided at the bend of the mudguard. The air collection hole is connected to an air pipe, and each air pipe is connected to a collection pipe. The collection pipe is connected to a main pipe, and the main pipe is connected to the second exhaust port.

[0036] Specifically, one end of the trachea is connected to the gas collection port, and the other end is connected to the collection pipe, which is fixedly connected to the inner wall of the second treatment tank; one end of the main pipe is connected to the collection pipe, and the other end is connected to the second exhaust port.

[0037] A gas collection hole is provided on the main pipe near the second exhaust port to collect the gas from the top of the second treatment tank into the second exhaust pipe.

[0038] In one embodiment, another approach provides a method for treating wastewater containing organic polymers, comprising the following steps:

[0039] S1. Remove some of the lignin from the raw water by air flotation;

[0040] S2. Filter the effluent after the air flotation treatment;

[0041] S3. The filtered water is then subjected to ozone catalytic treatment in the first treatment tank.

[0042] S4. The effluent after ozone catalytic treatment is then subjected to anaerobic treatment in a second treatment tank.

[0043] The beneficial effects of this application are:

[0044] Firstly, the flotation and filtration units act as a pre-treatment physical barrier, effectively removing suspended solids and protecting subsequent advanced oxidation and biological treatment units from clogging and toxicity. In particular, the flotation tank can scrape out most of the lignin, which can be processed into fuel, etc. The synergistic effect of ozone and anaerobic digestion allows the system to adapt to fluctuations in water quality and quantity, ensuring stable effluent compliance even when faced with wastewater containing high concentrations or complex organic polymers.

[0045] A synergistic process of "ozone pretreatment-anaerobic digestion" is employed. Ozone first powerfully breaks down large molecules such as lignin, disrupting their stubborn aromatic ring structures and converting them into easily biodegradable small-molecule organic acids and aldehydes, significantly improving the biodegradability of the wastewater. Subsequently, these intermediate products enter the anaerobic reactor, where they are efficiently converted into biogas and a small amount of sludge by microorganisms. This cascade reaction of "chemical cell disruption + biological transformation" overcomes the bottlenecks of single technologies and achieves the complete degradation of stubborn pollutants.

[0046] The first treatment tank efficiently breaks down large molecules such as lignin, significantly reducing the load on subsequent biological treatment and shortening the hydraulic retention time required for anaerobic digestion, making the entire system more compact and efficient. Simultaneously, the biogas produced during the anaerobic process can be recovered and reused as clean energy, partially offsetting the high energy consumption of the ozone generator, achieving energy recycling within the system, and significantly reducing overall operating costs.

[0047] By connecting the purified water outlet of the filtration unit to the water storage tank and utilizing the forward and reverse rotation function of the centrifugal pump, efficient and convenient online backwashing of the filtration unit is achieved. This not only restores the performance of the filter media and ensures the stability of the pretreatment effect, but also realizes the internal recycling of water resources, reduces the trouble of external cleaning and wastewater discharge, and demonstrates the intelligence and economy of the system design.

[0048] Equipped with an exhaust gas treatment device, the system decomposes unreacted ozone emitted from the ozone oxidation tower, preventing it from polluting the atmosphere. Simultaneously, the biogas produced during the anaerobic process is collected and recovered, avoiding the direct emission of the greenhouse gas methane. The entire system achieves the harmless, reduced-volume, and resource-based treatment of pollutants. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 This is a top view of the processing system in one embodiment of this application;

[0051] Figure 2 This is one embodiment of the present application Figure 1 A schematic diagram of the cross-sectional structure at point A in the diagram;

[0052] Figure 3 This is a schematic diagram of the structure of the first processing tank in one embodiment of this application;

[0053] Figure 4 This is a schematic diagram of the structure of the second processing tank in one embodiment of this application;

[0054] Figure 5 This is a top view schematic diagram of the filter screen distribution in a filter tank according to one embodiment of this application;

[0055] Figure 6 This is a schematic diagram of the main structure of the filter tank in one embodiment of this application;

[0056] Figure 7 This is one embodiment of the present application Figure 6 A schematic diagram of the cross-sectional structure at point B in the diagram;

[0057] Figure 8 This is a schematic flowchart of a processing method in one embodiment of this application;

[0058] The components include: 1. Flotation tank; 11. Raw water pipe; 12. Compressed air pipe; 13. First pump body; 14. Scraping mechanism; 141. Conveyor belt; 142. Scraper; 15. Collection tank; 16. Sludge discharge port; 17. Submersible sewage pump; 18. Mixing tank; 19. Fourth pump body; 2. Filtration mechanism; 21. Clean water outlet; 22. Sewage outlet; 23. Second pump body; 24. Filter; 25. Filtration tank; 251. Tank body; 252. Filter screen; 253. Cover plate; 254. Lifting rod; 255. Ring plate; 256. Drive motor; 257. Drive rod; 258. Support plate; 259. Through hole; 3. First treatment tank; 31. Ozone generator; 32. Third pump body; 33. First exhaust port; 34. Aeration disc; 35. Packing layer; 36. First pipeline; 4. Second treatment tank; 41. Second exhaust port; 42. Second pipeline; 43. Water distribution disc; 44. Mud baffle; 45. Air pipe; 46. Collection pipe; 47. Main pipe; 5. Water storage tank; 51. Water pump; 6. Hydrocyclone; 61. Sludge collection tank; Detailed Implementation

[0059] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application. Similarly, the following examples are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] This application proposes improvements and innovations, and presents the following embodiments.

[0062] In some implementations, please refer to Figures 1 to 7 On the one hand, an organic polymer wastewater treatment system is provided, including:

[0063] The air flotation tank 1 has an inlet that is connected to the raw water pipe 11 and the compressed air pipe 12; the outlet of the air flotation tank 1 is connected to the first pump body 13.

[0064] The filter mechanism 2 has an inlet connected to the first pump body 13; the filter mechanism 2 has a clean water outlet 21 and a wastewater outlet 22; the wastewater outlet 22 is connected to the second pump body 23.

[0065] The first treatment tank 3 has its inlet connected to the second pump body 23; the inlet of the first treatment tank 3 is also connected to an ozone generator 31; the outlet of the first treatment tank 3 is connected to a third pump body 32; and the first exhaust port 33 of the first treatment tank 3 is used to connect to the exhaust gas treatment device.

[0066] The second treatment tank 4 has an inlet connected to the third pump body 32; the outlet of the second treatment tank 4 is connected to a water storage tank 5; and the second exhaust port 41 of the second treatment tank 4 is connected to a gas recovery device.

[0067] The purified water outlet 21 is connected to the water storage tank 5; the water storage tank 5 is connected to the first pump body 13.

[0068] The purified water outlet 21 is connected to the water storage tank 5 via a centrifugal pump. The direction of water flow is changed by the forward and reverse rotation of the centrifugal pump. When the centrifugal pump reverses, it performs backwashing on the filter mechanism 2, thereby improving the filtration efficiency of the filter mechanism 2.

[0069] The flotation and filtration units act as a pre-treatment physical barrier, effectively removing suspended solids and protecting subsequent advanced oxidation and biological treatment units from clogging and toxicity. In particular, the flotation tank 1 can scrape out most of the lignin, which can be processed into fuel, etc. The synergistic effect of ozone and anaerobic digestion enables the system to adapt to fluctuations in water quality and quantity, ensuring stable effluent compliance even when faced with wastewater containing high concentrations or complex organic polymers.

[0070] A synergistic process of "ozone pretreatment-anaerobic digestion" is employed. Ozone first powerfully breaks down large molecules such as lignin, disrupting their stubborn aromatic ring structures and converting them into easily biodegradable small-molecule organic acids and aldehydes, significantly improving the biodegradability of the wastewater. Subsequently, these intermediate products enter the anaerobic reactor, where they are efficiently converted into biogas and a small amount of sludge by microorganisms. This cascade reaction of "chemical cell disruption + biological transformation" overcomes the bottlenecks of single technologies and achieves the complete degradation of stubborn pollutants.

[0071] The first treatment tank 3 efficiently breaks down large molecules such as lignin, significantly reducing the load on subsequent biological treatment and shortening the hydraulic retention time required for anaerobic digestion, making the entire system more compact and efficient. Simultaneously, the biogas produced during the anaerobic process can be recovered and reused as clean energy, partially offsetting the high energy consumption of the ozone generator 31, achieving energy circulation within the system, and significantly reducing overall operating costs.

[0072] By connecting the purified water outlet 21 of the filter unit 2 to the water storage tank 5 and utilizing the forward and reverse rotation function of the centrifugal pump, efficient and convenient online backwashing of the filter unit 2 is achieved. This not only restores the performance of the filter media and ensures the stability of the pretreatment effect, but also realizes the internal recycling of water resources, reduces the trouble of external cleaning and wastewater discharge, and demonstrates the intelligence and economy of the system design.

[0073] Equipped with an exhaust gas treatment device, the system decomposes unreacted ozone emitted from the ozone oxidation tower, preventing it from polluting the atmosphere. Simultaneously, the biogas produced during the anaerobic process is collected and recovered, avoiding the direct emission of the greenhouse gas methane. The entire system achieves the harmless, reduced-volume, and resource-based treatment of pollutants.

[0074] In one embodiment, the top of the flotation tank 1 is provided with a scraping mechanism 14 for scraping off the scum on the surface of the raw water in the flotation tank 1; a collection trough 15 for receiving scum is fixed on the outer wall of the flotation tank 1; the collection trough 15 is located below the discharge port of the scraping mechanism 14.

[0075] Specifically, the scraping mechanism 14 includes a conveyor belt 141, on which multiple scrapers 142 are fixedly connected. The multiple scrapers 142 are arranged at intervals along the extension direction of the conveyor belt 141. The conveyor belt 141 is fixedly installed on the top of the flotation tank 1, and a portion of the scrapers 142 extends below the water surface.

[0076] The scum collected in the collection tank 15 is transferred to the corresponding processing equipment and processed into fuel for recycling. This also reduces the processing load on the treatment system.

[0077] The mechanical automatic scum removal by the conveyor belt 141 and scraper 142 can continuously and efficiently remove the scum on the surface of the flotation tank 1, preventing the scum from accumulating too much and re-dissolving into the water or flowing into subsequent units with the water flow, thereby ensuring the stable operation of the filtration mechanism 2 and subsequent reactors.

[0078] The collected scum was transported and processed into fuel, realizing the resource utilization of solid waste. This not only created additional economic value for the system, but more importantly, it significantly reduced the amount of sludge that needed to be transported for disposal, thereby lowering the overall operating costs and environmental burden of the system.

[0079] The scraping mechanism 14 has a simple structural design, is easy to manufacture and maintain, can adapt to the continuous operation environment of sewage treatment plants, and has high reliability.

[0080] In one embodiment, the bottom of the flotation tank 1 is provided with a sludge discharge port 16, which is connected to a mixing tank 18 via a submersible sludge pump 17; the outlet of the mixing tank 18 is connected to a hydrocyclone 6 via a fourth pump body 19; the clean water outlet of the hydrocyclone 6 is connected to the inlet of the first pump body 13; and the sludge discharge outlet of the hydrocyclone 6 is connected to a sludge collection tank 61.

[0081] The inclined design at the bottom of the flotation tank 1, combined with the submersible pump 17, ensures that settling sludge can be completely discharged. Sludge sorting via a hydrocyclone effectively separates less dense organic matter such as lignin from denser inorganic particles such as gravel. This allows the organic-rich portion to be returned to the front end of the system for further treatment, improving the overall pollutant removal rate.

[0082] The sludge that enters the sludge collection tank 61 after separation is mainly inorganic particles with low organic content and stable properties, meeting safer disposal standards. This greatly reduces the amount of hazardous waste generated, making subsequent sludge cleaning and off-site disposal simpler, more economical, and safer.

[0083] The bottom of the flotation tank 1 is sloped, with the lowest point of the slope at the sludge discharge port 16. The water storage tank 5 is connected to the mixing tank 18 via a water pump 51, used to replenish the mixing tank 18 with water. Both the mixing tank 18 and the hydrocyclone 6 are commercially available. The mixing tank 18 is used to evenly mix the sludge, preventing it from settling to the bottom, while the hydrocyclone 6 is used to separate organic matter such as lignin from large particulate impurities such as silt. Workers need to periodically clean the sludge and transfer it to the next stage of treatment.

[0084] In one embodiment, the filtration mechanism 2 includes a filter 24 and a filter tank 25. The inlet of the filter 24 is connected to the first pump body 13, and the outlet of the filter 24 is connected to the inlet of the filter tank 25. The filter tank 25 has a clean water outlet 21 and a wastewater outlet 22.

[0085] Specifically, filter 24 is a commercially available bag filter, which filters through a filter bag with a certain mesh size. This filter bag needs to be cleaned regularly, and impurities are introduced into the mixing tank 18 for further separation. The filter bag can block larger particles of impurities, but it cannot block lignin.

[0086] The combination of a bag filter 24 and a filter tank 25 forms a multi-stage barrier that combines coarse and fine filtration. The bag filter 24 first removes large particles of impurities, protecting the subsequent precision filter screen 252 from clogging; the filter tank 25 is responsible for intercepting finer suspended solids, ensuring the cleanliness of the water entering the advanced oxidation unit.

[0087] In one embodiment, the filter tank 25 includes a tank body 251, a filter screen 252, a cover plate 253, a lifting rod 254 with a rack and pinion, a ring plate 255, a drive motor 256, and a drive rod 257 with gears; the filter screen 252 is disposed inside the tank body 251, dividing the tank body 251 into a sewage area and a clean water area; the clean water outlet 21 and the sewage outlet 22 are respectively connected to the clean water area and the sewage area.

[0088] A cover plate 253 is fixedly installed on the tank body 251, and a hole is provided on the cover plate 253 for the lifting rod 254 to pass through. The end of the lifting rod 254 located inside the tank body 251 is fixedly connected to the ring plate 255. The ring plate 255 abuts against the filter screen plate 252, and the ring plate 255 can slide on the filter screen plate 252. The ring plate 255 is located in the sewage area. The lifting rod 254 and the drive rod 257 are connected by a gear and rack. The drive rod 257 is rotatably connected to the cover plate 253. The gear of the drive rod 257 is connected to the output end of the drive motor 256. The drive motor 256 is fixedly connected to the cover plate 253.

[0089] By driving the ring plate 255 to move on the filter screen 252 via the drive motor 256, the trapped impurities can be automatically scraped off and collected to the sewage outlet 22. This design realizes online automatic cleaning of the filter screen 252, completely solving the problem of frequent shutdowns for manual cleaning due to clogging in traditional filtration equipment, ensuring continuous and stable operation of the system, and reducing the intensity of manual maintenance.

[0090] In one embodiment, there are multiple filter screens 252, lifting rods 254, and ring plates 255; a support plate 258 is fixedly connected to the lower part of the pool body 251; multiple through holes 259 are provided on the support plate 258; multiple filter screens 252 are fixedly connected and enclosed on the through holes 259 along the edge of the through holes 259; the support plate 258 and multiple filter screens 252 together divide the pool body 251 into a sewage area and a clean water area; multiple ring plates 255 are distributed sequentially at intervals, and each filter screen 252 abuts against a corresponding ring plate 255.

[0091] Specifically, the multiple filters are spaced apart to create an S-shaped flow channel, increasing the water flow time, making full use of the space in the pool 251, and improving the filtration effect.

[0092] The support plate 258 is inclined, and the lowest position on the support plate 258 is the sewage outlet 22. The ring plate 255 scrapes the impurities scraped off the filter screen 252 and flows them out of the sewage outlet 22 into the first treatment tank 3 for centralized treatment.

[0093] Multiple filter screens 252 are arranged at intervals to form an S-shaped flow channel, which increases the effective flow of water and the contact time with the filter media, maximizing filtration efficiency within the limited space of the pool 251. The inclined support plate 258 utilizes gravity for natural flow guidance, facilitating the collection and discharge of sludge.

[0094] In one embodiment, an aeration disc 34 is fixedly connected to the lower part of the first treatment tank 3, and the aeration disc 34 is connected to the inlet of the first treatment tank 3; a packing layer 35 is above the aeration disc 34; the packing layer 35 is fixedly connected to the inner wall of the first treatment tank 3; a first exhaust port 33 is at the top of the first treatment tank 3, and the outlet of the first treatment tank 3 is located above the packing layer 35.

[0095] Specifically, the sludge discharge port 16 of the first treatment tank 3 is connected to the mixing tank 18 through the first pipe 36. The sludge discharge port 16 of the second treatment tank 4 is connected to the mixing tank 18 through the second pipe 42.

[0096] Aeration discs 34 are available on the market.

[0097] The bottom packing layer 35 of the first treatment tank 3 is filled with packing materials of different properties or different catalytic activities from bottom to top. The packing materials are stacked on a plate with multiple holes in sequence, and the plate is fixedly connected to the inner wall of the first treatment tank 3.

[0098] The lower layer is filled with a catalyst with large pore size and high adsorption capacity (such as a catalyst supported on macroporous activated alumina). Its main function is to adsorb large organic molecules (such as lignin) and carry out preliminary cracking.

[0099] The upper layer is filled with a catalyst with high catalytic activity but small pore size (such as TiO2 / MnO2 honeycomb ceramic), which is responsible for the deep oxidation of small molecule intermediates generated by the cracking of the lower layer.

[0100] A gradient packing layer 35 design, from bottom to top and from adsorption to catalysis, simulates the "pretreatment-deep processing" process of industrial reactions. The lower packing layer is responsible for adsorbing and initially breaking down large lignin molecules, while the upper packing layer thoroughly oxidizes the generated small molecule intermediates. This division of labor avoids reaction blind spots and significantly improves the utilization efficiency of ozone and the degree of pollutant degradation.

[0101] The aeration disc 34 at the bottom can break ozone gas into microbubbles, which greatly increases the gas-liquid contact area, allowing ozone and pollutants to come into more full contact with the catalyst in the packing layer 35, thereby significantly accelerating the catalytic oxidation reaction rate.

[0102] The sludge discharge port 16 of the first treatment tank 3 is connected to the mixing tank 18, so that a small amount of biofilm or sediment that may be generated during the catalytic oxidation process can be returned to the front end for reprocessing, realizing the circulation and reduction of sludge in the system and further improving the treatment efficiency of the entire system.

[0103] In one embodiment, a water distribution plate 43 is fixedly connected to the lower part of the second treatment tank 4, and the water distribution plate 43 is connected to the water inlet of the second treatment tank 4; above the water distribution plate 43 are multiple mudguards 44, which are all fixedly connected to the inner wall of the second treatment tank 4, and the multiple mudguards 44 are staggered and spaced apart; the water outlet of the second treatment tank 4 is located above the mudguards 44; the top of the second treatment tank 4 is a second exhaust port 41.

[0104] Specifically, the gas recovery device is a commercially available gas storage tank used to store the biogas discharged from the second exhaust port 41. The structure of the water distribution plate 43 is the same as that of the aeration plate 34, and both are available on the market.

[0105] In one embodiment, the mudguard 44 has a V-shaped cross-section, and an air collection hole is provided at the bend of the mudguard 44. The air collection hole is connected to an air pipe 45, and each air pipe 45 is connected to a collection pipe 46. The collection pipe 46 is connected to a main pipe 47, and the main pipe 47 is connected to the second exhaust port 41.

[0106] The water distribution tray 43 ensures that the influent is evenly distributed at the bottom of the reactor, providing good initial contact conditions for anaerobic sludge and wastewater. The staggered V-shaped baffles 44 greatly extend the water flow path, creating a more stable upflow environment, which is conducive to the full contact and degradation of sludge and pollutants.

[0107] A gas collection hole is opened at the bend of the V-shaped mudguard 44 and connected to a gas pipe 45, which can collect the tiny biogas bubbles generated during the reaction process and attached to the sludge particles in a timely and effective manner. This design prevents the disorderly merging and floating of bubbles from agitating the sludge bed, maintaining the stability of the bed, and greatly improving the biogas collection efficiency, making gas recovery more complete.

[0108] The collected biogas is stored in storage tanks and can be reused as energy for the system (such as driving boilers or generating electricity), which effectively reduces the external energy dependence of the sewage treatment system and is in line with the concept of green and sustainable development.

[0109] Specifically, one end of the trachea 45 is connected to the gas collection hole, and the other end is connected to the collection pipe 46, which is fixedly connected to the inner wall of the second treatment tank 4; one end of the main pipe 47 is connected to the collection pipe 46, and the other end is connected to the second exhaust port 41.

[0110] A gas collection hole is provided on the main pipe 47 near the second exhaust port 41 to collect the gas at the top of the second treatment tank 4 into the second exhaust pipe 45.

[0111] In one embodiment, see Figure 8 On the other hand, a method for treating wastewater containing organic polymers is provided, comprising the following steps:

[0112] S1. Remove some of the lignin from the raw water by air flotation;

[0113] S2. Filter the effluent after the air flotation treatment;

[0114] S3. The filtered water is then subjected to ozone catalytic treatment in the first treatment tank 3.

[0115] S4. The effluent after ozone catalytic treatment is then subjected to anaerobic treatment in the second treatment tank 4.

[0116] This treatment method integrates physical (air flotation, filtration), chemical (ozone catalytic oxidation), and biological (anaerobic digestion) processes into a coherent process chain. Each step is interconnected, with each preceding unit creating optimal conditions for the next, ultimately achieving efficient and thorough removal of organic polymers, especially lignin.

[0117] The above are merely optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An organic polymer wastewater treatment system, characterized in that, include: The air flotation tank has an inlet that is connected to a raw water pipe and a compressed air pipe; the outlet of the air flotation tank is connected to a first pump body. The filter mechanism has an inlet connected to the first pump body; the filter mechanism has a clean water outlet and a wastewater outlet; the wastewater outlet is connected to a second pump body. The first treatment tank has its inlet connected to the second pump body; the inlet of the first treatment tank is also connected to an ozone generator; the outlet of the first treatment tank is connected to a third pump body; and the first exhaust port of the first treatment tank is connected to an exhaust gas treatment device. The second treatment tank has its inlet connected to the third pump body; its outlet is connected to a water storage tank; and its second exhaust port is connected to a gas recovery device. The purified water outlet is connected to the water storage tank; the water storage tank is connected to the first pump body; The top of the flotation tank is equipped with a scraping mechanism for removing scum from the surface of the raw water in the flotation tank; a collection trough for receiving scum is fixedly provided on the outer wall of the flotation tank; the collection trough is located below the discharge port of the scraping mechanism; the scraping mechanism includes a conveyor belt, on which multiple scrapers are fixedly connected, the multiple scrapers are spaced apart along the extension direction of the conveyor belt, the conveyor belt is fixedly installed on the top of the flotation tank, and a portion of the scrapers extends below the water surface. The bottom of the flotation tank is provided with a sludge discharge port, which is connected to a mixing tank via a submersible pump; the outlet of the mixing tank is connected to a hydrocyclone via a fourth pump body; the clean water outlet of the hydrocyclone is connected to the inlet of the first pump body; and the sludge discharge outlet of the hydrocyclone is connected to a sludge collection tank. The filtration mechanism includes a filter and a filtration tank. The inlet of the filter is connected to the first pump body, and the outlet of the filter is connected to the inlet of the filtration tank. The filtration tank has a clean water outlet and a wastewater outlet. The filtration tank includes a tank body, a filter screen, a cover plate, a lifting rod with a rack and pinion, a ring plate, a drive motor, and a drive rod with gears; the filter screen is disposed in the tank body. The cover plate is fixedly mounted on the pool body, and the cover plate has holes for the lifting rod to pass through; the end of the lifting rod located inside the pool body is fixedly connected to the ring plate; the ring plate abuts against the filter screen plate, and the ring plate can slide on the filter screen plate; the lifting rod and the drive rod are connected by a gear and rack; the drive rod is rotatably connected to the cover plate; the gear of the drive rod is connected to the output end of the drive motor; the drive motor is fixedly connected to the cover plate; there are multiple filter screen plates, lifting rods, and ring plates; the pool body A support plate is fixedly connected to the lower part; the support plate has multiple spaced through holes; multiple filter screens are fixedly connected along the edges of the through holes and surround the through holes; the support plate and the multiple filter screens together divide the pool into a sewage area and a clean water area; the clean water outlet and the sewage outlet are respectively connected to the clean water area and the sewage area; the ring plate is located in the sewage area; the multiple filter screens are spaced apart to make the water channel form an S-shaped flow channel; the multiple ring plates are distributed sequentially at intervals, and each filter screen abuts against the corresponding ring plate.

2. The processing system according to claim 1, characterized in that, An aeration disc is fixedly connected to the lower part of the first treatment tank, and the aeration disc is connected to the inlet of the first treatment tank; a packing layer is above the aeration disc; the packing layer is fixedly connected to the inner wall of the first treatment tank; the top of the first treatment tank is the first exhaust port, and the outlet of the first treatment tank is located above the packing layer.

3. The processing system according to claim 2, characterized in that, The lower part of the second treatment tank is fixedly connected to a water distribution plate, which is connected to the water inlet of the second treatment tank; above the water distribution plate are multiple mudguards, each fixedly connected to the inner wall of the second treatment tank, which are staggered and spaced apart; the water outlet of the second treatment tank is located above the mudguards; the top of the second treatment tank is the second exhaust port.

4. The processing system according to claim 3, characterized in that, The mudguard has a V-shaped cross-section, and an air collection hole is provided at the bend of the mudguard. The air collection hole is connected to an air pipe, and each air pipe is connected to a collection pipe. The collection pipe is connected to a main pipe, and the main pipe is connected to the second exhaust port.

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