A hemodialysis wastewater treatment apparatus

Abstract

This application relates to the technical field of wastewater treatment equipment, specifically providing a hemodialysis wastewater treatment device. The device includes: a base body; a wastewater collection tank located on the right rear side of the base body, with an inlet; a dissolved air pump located at the outlet end of the wastewater collection tank; an ozone catalytic oxidation tower connected to the dissolved air pump, located on the left rear side of the base body; a filter assembly located at the outlet end of the ozone catalytic oxidation tower; and an outlet located at the outlet end of the filter assembly. By replacing the traditional biochemical tank with an ozone catalytic oxidation tower, and combining efficient ozone oxidation reaction with membrane filtration, the device effectively reduces the reliance on large-area reaction tanks in traditional processes, fundamentally solving the problem of large footprint in existing hemodialysis wastewater treatment equipment.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment equipment technology, and more particularly to a hemodialysis wastewater treatment equipment. Background Technology

[0002] Currently, medical dialysis centers generate large amounts of dialysis wastewater containing organic matter, microorganisms, and drug residues during hemodialysis treatment. If this wastewater is discharged directly into the municipal sewer system without effective treatment, it will seriously impact the environment and public health. Therefore, specialized hemodialysis wastewater treatment equipment is required before discharge.

[0003] Most existing hemodialysis wastewater treatment equipment uses traditional biochemical treatment processes. These systems typically require large biochemical tanks or reaction tanks to provide sufficient hydraulic retention time and microbial reaction space to achieve the desired treatment effect. However, these biochemical tanks generally have a large footprint, especially in hospitals with limited underground space or when renovating existing buildings, making it difficult to arrange large-volume tank structures and hindering the widespread application of the equipment.

[0004] Therefore, existing technologies have defects and shortcomings, and need further improvement and development. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a hemodialysis wastewater treatment device, which aims to solve the problem of the large footprint of the existing hemodialysis wastewater treatment device.

[0006] The technical solution adopted by this application to solve the technical problem is as follows: A hemodialysis wastewater treatment device for treating dialysis wastewater, comprising:

[0007] Base body;

[0008] A wastewater collection tank is located on the right rear side of the base body. The wastewater collection tank is used to collect wastewater discharged during dialysis. The wastewater collection tank is provided with an inlet.

[0009] A dissolved air pump is installed at the outlet of the sewage collection tank. The dissolved air pump is used to mix ozone generated by the ozone generator into the pumped water to form ozone microbubbles. The dissolved air pump is located on the front side of the base body.

[0010] An ozone catalytic oxidation tower is connected to the dissolved air pump. The ozone catalytic oxidation tower is used to generate hydroxyl radicals under the action of ozone to oxidize and degrade organic matter in wastewater. The ozone catalytic oxidation tower is located on the left rear side of the base body.

[0011] A filter assembly is disposed at the outlet end of the ozone catalytic oxidation tower;

[0012] The water outlet is located at the outlet end of the filter assembly and is used to discharge the treated effluent into the municipal sewage pipe network.

[0013] Optionally, the filtration assembly includes a primary membrane filter and a secondary membrane filter;

[0014] The primary membrane filter is installed at the outlet end of the ozone catalytic oxidation tower;

[0015] The secondary membrane filter is installed at the outlet end of the primary membrane filter.

[0016] Optionally, the hemodialysis wastewater treatment equipment further includes:

[0017] The backwash return pipeline has its inlet end connected to the drain ends of the primary membrane filter and the secondary membrane filter, and its outlet end connected to the inlet. The backwash water returns to the wastewater collection tank through the inlet.

[0018] Optionally, the primary membrane filter includes a stainless steel filter screen, which is used to filter larger suspended particles.

[0019] Optionally, the secondary membrane filter includes an ultrafiltration membrane assembly for filtering bacteria, colloids, and residual organic contaminants.

[0020] Optionally, the ozone catalytic oxidation tower is internally equipped with a water distribution plate, an aeration disc, and packing material arranged sequentially from top to bottom. An oxidation tower inlet is located on the upper side of the ozone catalytic oxidation tower, an ozone inlet is located on the lower side of the ozone catalytic oxidation tower, and a drain outlet is located at the bottom or side of the ozone catalytic oxidation tower. The inlet is connected to the oxidation tower inlet; the ozone inlet is connected to the ozone generator; and the drain outlet is connected to the filter assembly.

[0021] Optionally, the hemodialysis wastewater treatment equipment further includes:

[0022] A sludge pump is connected to the sewage collection tank and is used to pump out sludge from the sewage collection tank.

[0023] Optionally, the ozone generator further includes:

[0024] Ozone generator;

[0025] An ozone circulating water tank is connected to an ozone generator. The inlet of the ozone circulating water tank is connected to the outlet of a dissolved air pump, and the outlet of the ozone circulating water tank is connected to the ozone inlet of the ozone catalytic oxidation tower.

[0026] Optionally, the ozone generator further includes a dosing device, which is installed at the inlet of the wastewater collection tank and is used to add flocculant to the wastewater collection tank.

[0027] Optionally, the hemodialysis wastewater treatment equipment further includes:

[0028] A control room is located in front of the sewage collection tank. The control room is equipped with a controller, which is connected to the sludge pump, dissolved air pump, and ozone generator.

[0029] Compared with existing technologies, this application provides a hemodialysis wastewater treatment device. This device compactly integrates core components such as a wastewater collection tank, dissolved air pump, ozone catalytic oxidation tower, filter components, and outlet onto a base body, and rationally arranges their relative positions, resulting in a modular and compact system. By replacing the traditional biochemical tank with an ozone catalytic oxidation tower, combined with efficient ozone oxidation reaction and membrane filtration, the reliance on large-area reaction tanks in traditional processes is effectively reduced. This fundamentally solves the problem of large footprint in existing hemodialysis wastewater treatment equipment, significantly improving the device's adaptability to confined spaces such as hospital basements and renovated areas, facilitating promotion and installation. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the hemodialysis wastewater treatment equipment provided in this application;

[0031] Figure 2 This is a schematic block diagram of the pipeline connection of the hemodialysis wastewater treatment equipment provided in this application;

[0032] Figure 3 This is a three-dimensional structural schematic diagram of the hemodialysis wastewater treatment equipment provided in this application from another perspective;

[0033] Figure 4 This is a bottom view of the hemodialysis wastewater treatment equipment provided in this application;

[0034] Figure 5 It is provided in this application Figure 4 A sectional view along the I-I direction;

[0035] Figure 6 It is provided in this application Figure 4 A sectional view along the II-II direction;

[0036] Figure 7 This is a schematic block diagram illustrating the functional principle of the hemodialysis wastewater treatment equipment provided in this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Hemodialysis wastewater treatment equipment; 11. Base body; 12. Sewage collection tank; 121. Inlet; 13. Dissolved air pump; 14. Ozone catalytic oxidation tower; 15. Filter assembly; 16. Outlet; 18. Backwash return pipeline; 19. Ozone generator; 20. Control room; 21. Controller; 22. Sludge pump; 211. Ozone sensor; 212. Float level controller; 151. Primary membrane filter; 152. Secondary membrane filter; 191. Ozone generator; 192. Ozone circulating water tank; 1911. Dosing device. Detailed Implementation

[0039] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0040] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] Please refer to the following: Figures 1 to 7 The first embodiment of this application provides a hemodialysis wastewater treatment device 10, which includes a base body 11, a sewage collection tank 12, a dissolved air pump 13, an ozone generator 19, an ozone catalytic oxidation tower 14, a filter assembly 15, a backwash return pipeline 18, a sludge pump 22, a dosing device 1911, a control room 20, and an outlet 16. The ozone generator 19 consists of an ozone generator 191 and an ozone circulating water tank 192, and the filter assembly 15 includes a primary membrane filter 151 and a secondary membrane filter 152.

[0043] The wastewater collection tank 12 is located on the right rear side of the base body 11 and has an inlet 121 for collecting wastewater discharged during dialysis. The dissolved air pump 13 is located on the front side of the base body 11 and connected to the outlet of the wastewater collection tank 12. It is used to lift and transport the wastewater and introduce ozone from the ozone generator 191 via the ozone circulating water tank 192 during the pumping process, forming an ozone microbubble mixture. The ozone catalytic oxidation tower 14 is located on the left rear side of the base body 11. The tower's interior, from top to bottom, is equipped with a water distribution plate, an aeration disc, and packing material for ozone catalytic oxidation treatment of the wastewater. The filter assembly 15 is located at the outlet of the ozone catalytic oxidation tower 14 and consists of a series-connected primary membrane filter 151 (stainless steel screen) and a secondary membrane filter 152 (ultrafiltration membrane assembly), used to remove large particulate matter, bacteria, colloids, and residual organic pollutants, respectively.

[0044] The control room 20 is located at the front of the wastewater collection tank 12, and is equipped with a controller 21. The controller 21 can control the start and stop of the sludge pump 22, dissolved air pump 13, and ozone generator 191 to achieve automated operation. A dosing device 1911 is located at the inlet 121 of the wastewater collection tank 12 and is used to add flocculants to the dialysis wastewater to promote the flocculation and sedimentation of suspended particles, facilitating subsequent sludge treatment. The sludge deposited at the bottom of the wastewater collection tank 12 can be periodically pumped out by the sludge pump 22 and discharged for disposal.

[0045] During the coordinated operation of the hemodialysis wastewater treatment equipment 10, the dialysis wastewater first enters the sewage collection tank 12 through the inlet 121. The dosing device 1911 adds flocculant to the wastewater to promote the sedimentation of suspended solids and form sludge. The supernatant is drawn by the dissolved air pump 13, and simultaneously, ozone gas supplied by the ozone circulating water tank 192 is introduced to form an ozone microbubble mixture, which is then injected into the ozone catalytic oxidation tower 14 through the oxidation tower inlet. After being evenly distributed by the distribution plate, the mixture undergoes a catalytic reaction of the iron-carbon carrier in the packing material, combined with the aeration disc to promote ozone decomposition, generating a large number of hydroxyl radicals, thereby efficiently degrading organic pollutants in the wastewater. The treated wastewater is discharged from the bottom of the tower, first entering the primary membrane filter 151 to filter large particulate impurities, then entering the secondary membrane filter 152 to deeply remove microorganisms and residual pollutants. Finally, the purified water that meets the standards is discharged into the municipal sewage network through the outlet 16.

[0046] During equipment operation, the backwash wastewater generated by the primary membrane filter 151 and the secondary membrane filter 152 is returned to the inlet 121 of the sewage collection tank 12 via the backwash return pipeline 18 for reprocessing, forming an internal circulation. The controller 21 automatically controls the start and stop of the dissolved air pump 13 and the ozone generator 191 according to the liquid level of the sewage collection tank 12, realizing intelligent operation. The hemodialysis wastewater treatment equipment 10 replaces the traditional large-scale biochemical tank with a compact structure of ozone catalytic oxidation tower 14, and combines it with an integrated membrane filtration system, effectively reducing the equipment footprint, significantly improving wastewater treatment efficiency, and solving the problems of large equipment size and difficulty in integration in the prior art.

[0047] Please refer to the following: Figures 1 to 2In some embodiments, the hemodialysis wastewater treatment equipment 10 includes a base body 11, a wastewater collection tank 12, a dissolved air pump 13, an ozone catalytic oxidation tower 14, a filter assembly 15, and an outlet 16. The wastewater collection tank 12 is located on the right rear side of the base body 11 and is used to collect wastewater discharged during dialysis. The wastewater collection tank 12 is provided with an inlet 121. The dissolved air pump 13 is located at the outlet end of the wastewater collection tank 12 and is used to mix ozone generated by the ozone generator 19 into the pumped water. The system generates ozone microbubbles; the dissolved air pump 13 is located on the front side of the base body 11; the ozone catalytic oxidation tower 14 is connected to the dissolved air pump 13, and the ozone catalytic oxidation tower 14 is used to generate hydroxyl radicals under the action of ozone to oxidize and degrade organic matter in wastewater; the ozone catalytic oxidation tower 14 is located on the left rear side of the base body 11; the filter assembly 15 is located at the outlet end of the ozone catalytic oxidation tower 14; the outlet 16 is located at the outlet end of the filter assembly 15, and the outlet 16 is used to discharge the treated effluent into the municipal sewage pipe network. Furthermore, by compactly integrating the core components such as the sewage collection tank 12, dissolved air pump 13, ozone catalytic oxidation tower 14, filter assembly 15, and outlet 16 onto the base body 11, and rationally arranging their relative positions, the entire system presents a modular and compact layout. By replacing the traditional biochemical tank with an ozone catalytic oxidation tower 14, and combining efficient ozone oxidation reaction with membrane filtration treatment, the dependence of traditional processes on large-area reaction tanks is effectively reduced. This fundamentally solves the problem of the large footprint of the existing hemodialysis wastewater treatment equipment 10, significantly improving the equipment's adaptability to small spaces such as hospital basements and renovation spaces, and facilitating promotion and installation.

[0048] Please refer to the following: Figures 1 to 3 In some embodiments, the filtration assembly 15 includes a primary membrane filter 151 and a secondary membrane filter 152; the primary membrane filter 151 is disposed at the outlet of the ozone catalytic oxidation tower 14; and the secondary membrane filter 152 is disposed at the outlet of the primary membrane filter 151. Thus, by sequentially connecting the primary membrane filter 151 and the secondary membrane filter 152 in the filtration assembly 15, a tiered filtration strategy is achieved. The primary membrane filter 151 performs the function of initially intercepting larger suspended particulate matter, protecting the subsequent filtration assembly 15 from contamination, while the secondary membrane filter 152 further traps minute pollutants such as bacteria and colloids. This structure improves the overall filtration accuracy and efficiency, extends the service life of the filtration assembly 15, and avoids the incomplete treatment problems that may occur with traditional single-stage filtration, ensuring stable and compliant discharge of effluent, which is more suitable for the high pollution and high requirements of hemodialysis wastewater treatment.

[0049] Please refer to the following: Figures 1 to 2In some embodiments, the hemodialysis wastewater treatment equipment 10 further includes a backwash return pipeline 18. The inlet end of the backwash return pipeline 18 is connected to the drain ends of the primary membrane filter 151 and the secondary membrane filter 152, and the outlet end of the backwash return pipeline 18 is connected to the inlet 121. The backwash water returns to the wastewater collection tank 12 via the inlet 121. By setting up the backwash return pipeline 18 and connecting the drain ends of the primary membrane filter 151 and the secondary membrane filter 152 to the inlet 121 of the wastewater collection tank 12, the backwash water is recycled. This not only avoids the waste of water resources caused by the direct discharge of backwash water, but also allows untreated wastewater to be returned to the wastewater collection tank 12 for further treatment, improving the overall resource utilization and water treatment efficiency of the system and reducing operating costs.

[0050] In some embodiments, the primary membrane filter 151 includes a stainless steel filter screen, which is used to filter larger suspended particles. By setting the primary membrane filter 151 to a stainless steel filter screen structure, the interception capability of this component for larger suspended particles is enhanced. Because stainless steel filter screens have good strength, corrosion resistance, and can be repeatedly washed and reused, they can effectively withstand high filtration pressures and are easy to maintain daily, such as opening the primary membrane filter 151 for brushing and backwashing. This improves filtration reliability and equipment durability, which is beneficial for long-term stable operation, while providing good pre-treatment for subsequent, more precise secondary filtration.

[0051] In some embodiments, the secondary membrane filter 152 includes an ultrafiltration membrane module, which is used to filter bacteria, colloids, and residual organic pollutants. Furthermore, by incorporating an ultrafiltration membrane module into the secondary membrane filter 152—specifically, the filter membrane in the ultrafiltration membrane module can be an existing membrane layer, which will not be elaborated further in this application—it can efficiently intercept bacteria, colloids, and residual organic pollutants in wastewater, further improving the quality of the effluent. The ultrafiltration membrane has nanoscale pores, exhibiting a significant removal effect on pathogenic microorganisms, and is particularly suitable for the purification of medical wastewater. This structure complements the primary membrane filter 151, improving overall filtration accuracy, achieving stable effluent that meets standards, satisfying the water quality requirements for discharge into municipal sewage networks, and ensuring public health safety during equipment use.

[0052] In some implementations, ultrafiltration membrane modules use a membrane as the filtration medium, utilizing the pressure difference across the membrane as the driving force to allow solvents, inorganic ions, and small molecules to permeate through the membrane, while trapping microparticles and large molecules. Depending on the membrane's pore size and separation performance, membrane filters can be classified into various types, including ultrafiltration, nanofiltration, reverse osmosis, and microfiltration. The effluent from the ozone catalytic tower directly enters the primary membrane filtration system. Primary filtration can intercept the vast majority of particulate matter, ensuring the normal operation of the secondary membrane filtration system. The primary membrane filter is automatically cleaned periodically, and can be removed for manual cleaning after a certain period. The secondary membrane filter is equipped with an automatic backwashing system to ensure normal equipment operation. Depending on the volume of water to be treated, the membrane can be removed for disinfection and cleaning or directly replaced.

[0053] Please refer to the following: Figures 1 to 4 In some embodiments, the ozone catalytic oxidation tower 14 is internally equipped with a water distribution plate, an aeration disc, and packing material arranged sequentially from top to bottom. Specifically, the water distribution plate and aeration disc can be implemented using existing structures. An oxidation tower inlet is located on the upper side of the ozone catalytic oxidation tower 14, an ozone inlet is located on the lower side of the ozone catalytic oxidation tower 14, and a drain outlet is located at the bottom or side of the ozone catalytic oxidation tower 14. The water inlet 121 is connected to the oxidation tower inlet; the ozone inlet is connected to the ozone generator 19; and the drain outlet is connected to the filter assembly 15. This optimizes the flow distribution and reaction environment of wastewater entering the ozone catalytic oxidation tower 14. The water distribution plate ensures uniform wastewater distribution, the aeration disc releases fine ozone bubbles to enhance gas-liquid contact efficiency, and the packing material, as an iron-carbon carrier, promotes ozone decomposition and catalyzes the generation of hydroxyl radicals, thereby achieving efficient degradation of difficult-to-treat organic pollutants in wastewater. Meanwhile, the rational setting of the oxidation tower inlet, ozone inlet, and outlet optimizes the inlet and outlet water paths and gas injection channels, improves ozone utilization and tower reaction efficiency, further reduces equipment volume, and lowers the space requirements of traditional tanks.

[0054] In some embodiments, the ozone catalyst of the ozone catalytic oxidation tower 14 uses aluminum as a carrier and employs precious metal materials. Different ozone catalysts are used for different wastewater qualities, which can improve the COD removal rate of wastewater.

[0055] Please refer to the following: Figures 1 to 4In some embodiments, the hemodialysis wastewater treatment equipment 10 further includes a sludge pump 22, which is connected to the wastewater collection tank 12. The sludge pump 22 is used to extract sludge from the wastewater collection tank 12. By connecting the sludge pump 22 to the wastewater collection tank 12, sludge deposited at the bottom of the tank can be periodically extracted, preventing long-term accumulation of sludge in the tank that could cause foul odors, blockages, or water quality issues. Specifically, the sludge is periodically disinfected, dried, pressed, and then handed over to a third party with solid and hazardous waste treatment qualifications for deep processing. This structure optimizes the sludge management and cleaning process of the equipment, reduces the frequency of manual maintenance, improves the automation and continuity of system operation, and is beneficial to the stability and hygiene control of the entire treatment process.

[0056] Please refer to the following: Figures 3 to 4 In some embodiments, the ozone generating device 19 further includes an ozone generator 191 and an ozone generator 192; the ozone circulating water tank 192 is connected to the ozone generator 191, the inlet of the ozone circulating water tank 192 is connected to the outlet of the dissolved air pump 13, and the outlet of the ozone circulating water tank 192 is connected to the ozone inlet of the ozone catalytic oxidation tower 14. Furthermore, by connecting the ozone generator 191 and the ozone circulating water tank 192 in series, and connecting the ozone circulating water tank 192 to the dissolved air pump 13 and the ozone inlet of the ozone catalytic oxidation tower 14, a complete ozone supply and recycling system is formed. After the ozone is fully mixed with water in the circulating water tank, it enters the dissolved air pump 13 to form ozone microbubble liquid, which then enters the ozone catalytic oxidation tower 14 to participate in the reaction. This configuration improves the ozone mixing efficiency and catalytic reaction efficiency, reduces ozone waste, enhances the wastewater oxidation and degradation effect, and strengthens the equipment's treatment capacity in highly polluted organic wastewater scenarios.

[0057] Please refer to the following: Figure 2 In some embodiments, the ozone generator 191 further includes a dosing device 1911, which is installed at the inlet 121 of the wastewater collection tank 12. The dosing device 1911 is used to add flocculant to the wastewater collection tank 12. By installing the dosing device 1911 at the inlet 121 of the wastewater collection tank 12 and integrating it with the ozone generator 191, flocculant can be added at the initial stage of wastewater entering the system, causing suspended particles in the wastewater to quickly form flocs and settle to the bottom of the tank, effectively reducing the load on subsequent treatment. This achieves forward pretreatment, improved sludge separation efficiency, avoids clogging of the subsequent membrane filtration assembly 15 by particulate matter, and simultaneously improves the overall treatment efficiency and operational stability of the equipment, reducing equipment failure rate and maintenance frequency.

[0058] Please refer to the following: Figures 4 to 6In some embodiments, the hemodialysis wastewater treatment equipment 10 further includes a control room 20, which is located in front of the wastewater collection tank 12. A controller 21 is installed within the control room 20, and the controller 21 is connected to the sludge pump 22, dissolved air pump 13, and ozone generator 191. By positioning the control room 20 in front of the wastewater collection tank 12 and installing the controller 21 within it, the controller 21 can control the sludge pump 22, dissolved air pump 13, and ozone generator 191 in a coordinated manner. This allows for automatic start and stop of relevant components based on the liquid level in the wastewater collection tank 12, achieving intelligent and automated management of the equipment operation. This structure helps reduce the frequency of manual intervention, improves operational efficiency and safety, avoids excessive energy consumption or equipment damage due to prolonged pump operation, enhances the overall intelligence and reliability of the equipment, and meets the demands of modern medical systems for intelligent and safe wastewater treatment equipment.

[0059] Please refer to the following: Figures 1 to 3 In some embodiments, the hemodialysis wastewater treatment equipment 10 further includes an ozone sensor 211, which can be implemented using existing structures. This sensor is located around the ozone catalytic oxidation tower 14 and in the area where the ozone generator 191 is located, for real-time monitoring of the ozone concentration in the air. When the detected ozone concentration exceeds a set threshold (e.g., 0.1 ppm), the ozone sensor 211 outputs an over-limit signal and triggers an audible and visual alarm. Simultaneously, it transmits a control signal to the control system to automatically shut down the ozone generator 191, thereby achieving timely alarm and linkage protection against ozone leakage, ensuring equipment operation safety and the health of operators. The ozone sensor 211 is preferably an air monitoring alarm with a response time of no more than 3 seconds, powered by 220VAC.

[0060] In some embodiments, the hemodialysis wastewater treatment equipment 10 further includes a float level controller 212, which can be implemented using existing devices. It can be installed on the inner wall of the wastewater collection tank 12 to monitor the wastewater level in real time; it can also be installed on the inner wall of the ozone circulating water tank 192. The float level controller 212 controls the start and stop of the dissolved air pump and ozone generator 191 based on the liquid level: when the liquid level reaches a high threshold (e.g., ≥2.2m), the float rises and closes the contact, outputting a high liquid level signal to the controller 21, which in turn starts the dissolved air pump 13 and the ozone generator 191; when the liquid level drops to a low threshold (e.g., ≤0.5m), the float moves down and opens the contact, outputting a low liquid level signal, and the controller 21 then shuts down the dissolved air pump 13 and the ozone generator 191 to prevent dry running of the equipment. The float level controller 212 has a detection range of 0–3m, is made of corrosion-resistant stainless steel, and its output dry contact signal is electrically connected to the controller 21.

[0061] In some implementations, ozone oxidation is achieved primarily through two pathways: direct and indirect reactions. Direct reaction refers to the direct reaction between ozone and organic matter. This method is highly selective, generally favoring organic compounds with double bonds, and is typically effective against unsaturated aliphatic and aromatic hydrocarbons. Indirect reaction involves the decomposition of ozone to produce -OH groups, which then oxidize organic matter. This method is not selective. While ozone oxidation has a strong ability to decolorize and remove organic pollutants, it is selective in its oxidation of organic matter. At low doses and in short timeframes, pollutants cannot be completely mineralized, and the intermediate products generated during decomposition can inhibit the ozone oxidation process. The main function is to use a dissolved air pump to convert ozone into microbubbles, which are then used to impact an iron-carbon carrier within the catalytic tower. The resulting wastewater reacts with the carrier after the bubbles break. During operation, the working pressure is maintained at 2-3 kg / cm³. 2 This is conducive to the complete reaction of ozone.

[0062] In some implementations, hemodialysis wastewater is collected into a wastewater collection tank via a collection pipeline network. The collection tank is configured with three compartments. The backwashing wastewater will return to the first compartment. A dissolved air pump is installed in the third compartment. The operation of the dissolved air pump is controlled by a float level controller 212 that detects the liquid level in the collection tank. Ozone is connected to the air end of the dissolved air pump so that the ozone enters the ozone reaction tower.

[0063] In some implementations, a swirling water distribution and aeration disc is installed inside the ozone catalytic oxidation tower, replacing the traditional separate water distribution plate and aeration disc. The disc surface is machined with 12 sets of spiral guide grooves, 5mm deep, at a 45° angle, with the center connected to the ozone inlet and tangential water inlets at the edges. Wastewater is injected tangentially at a flow rate of ≥2m / s to form a swirling flow, and ozone microbubbles are released from the central hole, where they are intensified to mix with the wastewater under centrifugal force. The packing material adopts a gradient packing scheme, with the upper layer consisting of Φ10mm porous ceramic particles to trap suspended solids, and the lower layer consisting of Φ2mm nano-iron-carbon particles for catalytic reaction, completely solving the problem of carrier clogging.

[0064] In some implementations, a plate heat exchanger is integrated at the cooling water outlet of the ozone generator to recover the waste heat from the 60°C cooling water and preheat the wastewater. Within the stainless steel corrugated plates of the heat exchanger, the cooling water exchanges heat with the counter-flowing wastewater (initially 15°C), raising the wastewater temperature to 30°C. A temperature sensor monitors the water temperature in real time, and automatically closes the heat exchange bypass valve to prevent membrane damage when the temperature exceeds 35°C.

[0065] In some implementations, the backwash line of the secondary membrane filter is connected to a compressed air tank, specifically a 50L tank with a pressure of 0.8MPa, controlled by a solenoid valve with a 0.5-second instantaneous air pressure pulse. When the membrane differential pressure sensor detects ΔP ≥ 0.3MPa, the controller triggers pulse backwashing at a pressure of 0.6MPa, a frequency of 1 pulse / minute, for 3 cycles. This physical shock wave effectively removes blockages from the membrane pores, restoring membrane flux and extending membrane lifespan.

[0066] In summary, this application provides a hemodialysis wastewater treatment device, comprising: a base body; a wastewater collection tank located on the right rear side of the base body, used to collect wastewater discharged during dialysis; the wastewater collection tank having an inlet; a dissolved air pump located at the outlet of the wastewater collection tank, used to mix ozone generated by an ozone generator into the pumped water to form ozone microbubbles; the dissolved air pump located on the front side of the base body; an ozone catalytic oxidation tower connected to the dissolved air pump, used to generate hydroxyl radicals under the action of ozone to oxidize and degrade organic matter in the wastewater; the ozone catalytic oxidation tower located on the left rear side of the base body; a filter assembly located at the outlet of the ozone catalytic oxidation tower; and an outlet located at the outlet of the filter assembly, used to discharge the treated effluent into the municipal sewage network. Furthermore, by replacing the traditional biochemical tank with an ozone catalytic oxidation tower, and combining efficient ozone oxidation reaction with membrane filtration treatment, the dependence of traditional processes on large-area reaction tanks is effectively reduced. This fundamentally solves the problem of large footprint of existing hemodialysis wastewater treatment equipment, significantly improves the equipment's adaptability to small spaces such as hospital basements and renovation spaces, and facilitates promotion and installation.

[0067] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A hemodialysis wastewater treatment apparatus for treating dialysis wastewater, characterized by, The hemodialysis wastewater treatment equipment includes: Base body; A wastewater collection tank is located on the right rear side of the base body. The wastewater collection tank is used to collect wastewater discharged during dialysis. The wastewater collection tank is provided with an inlet. A dissolved air pump is installed at the outlet of the sewage collection tank. The dissolved air pump is used to mix ozone generated by the ozone generator into the pumped water to form ozone microbubbles. The dissolved air pump is located on the front side of the base body. An ozone catalytic oxidation tower is connected to the dissolved air pump. The ozone catalytic oxidation tower is used to generate hydroxyl radicals under the action of ozone to oxidize and degrade organic matter in wastewater. The ozone catalytic oxidation tower is located on the left rear side of the base body. A filter assembly is disposed at the outlet end of the ozone catalytic oxidation tower; The water outlet is located at the outlet end of the filter assembly and is used to discharge the treated effluent into the municipal sewage pipe network.

2. The hemodialysis wastewater treatment equipment according to claim 1, characterized in that, The filtration assembly includes a primary membrane filter and a secondary membrane filter; The primary membrane filter is installed at the outlet end of the ozone catalytic oxidation tower; The secondary membrane filter is installed at the outlet end of the primary membrane filter.

3. The hemodialysis wastewater treatment apparatus according to claim 2, characterized by The hemodialysis wastewater treatment equipment also includes: The backwash return pipeline has its inlet end connected to the drain ends of the primary membrane filter and the secondary membrane filter, and its outlet end connected to the inlet. The backwash water returns to the wastewater collection tank through the inlet.

4. The hemodialysis wastewater treatment apparatus according to claim 2, characterized by The primary membrane filter includes a stainless steel filter screen and is used to filter larger suspended particles.

5. The hemodialysis wastewater treatment equipment according to claim 3, characterized in that, The secondary membrane filter includes an ultrafiltration membrane module, which is used to filter bacteria, colloids, and residual organic contaminants.

6. The hemodialysis wastewater treatment equipment according to claim 4, characterized in that, The ozone catalytic oxidation tower is internally equipped with a water distribution plate, an aeration disc, and packing material arranged sequentially from top to bottom. An oxidation tower inlet is located on the upper side of the ozone catalytic oxidation tower, an ozone inlet is located on the lower side of the ozone catalytic oxidation tower, and a drain outlet is located at the bottom or side of the ozone catalytic oxidation tower. The water inlet is connected to the oxidation tower inlet; the ozone inlet is connected to the ozone generator; and the drain outlet is connected to the filter assembly.

7. The hemodialysis wastewater treatment equipment according to claim 4, characterized in that, The hemodialysis wastewater treatment equipment also includes: A sludge pump is connected to the sewage collection tank and is used to pump out sludge from the sewage collection tank.

8. The hemodialysis wastewater treatment equipment according to claim 6, characterized in that, The ozone generator also includes: Ozone generator; An ozone circulating water tank is connected to an ozone generator. The inlet of the ozone circulating water tank is connected to the outlet of a dissolved air pump, and the outlet of the ozone circulating water tank is connected to the ozone inlet of the ozone catalytic oxidation tower.

9. The hemodialysis wastewater treatment equipment according to claim 8, characterized in that, The ozone generator further includes a dosing device, which is installed at the inlet of the sewage collection tank and is used to add flocculant to the sewage collection tank.

10. The hemodialysis wastewater treatment equipment according to claim 7, characterized in that, The hemodialysis wastewater treatment equipment also includes: A control room is located in front of the sewage collection tank. The control room is equipped with a controller, which is connected to the sludge pump, dissolved air pump, and ozone generator.

Images