Sewage treatment device with sterilization and disinfection functions

Abstract

The utility model provides a sewage treatment device with sterilization and disinfection functions, which comprises an ozone aeration tank 1, a flocculation sedimentation tank 4, a biochemical treatment tank 6, a sludge incinerator 9 and a waste gas combustion system 10, treated sewage is firstly subjected to ozone aeration sterilization and disinfection, so that bacterial propagules, spores, viruses, fungi and the like can be killed, and endotoxin bacillus toxins can be destroyed; waste gas generated in the treatment process is subjected to heat storage combustion treatment, VOC in the waste gas is oxidized and decomposed into CO2 and H2O, and generated sludge is incinerated through a sludge incinerator, so that escape of bacteria and viruses is avoided, and resource utilization can be achieved. The method can be widely applied to special sewage treatment links of medical institutions, public places, biochemical engineering and the like.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection, and relates to the category of water pollution control, and in particular to a sewage treatment device with sterilization and disinfection function. Background Technology

[0002] Water pollution is caused by harmful chemicals that reduce or eliminate the usability of water, polluting the environment. When organic matter in wastewater is decomposed by microorganisms, it consumes oxygen in the water, affecting aquatic life. After dissolved oxygen is depleted, organic matter undergoes anaerobic decomposition, producing foul-smelling gases such as hydrogen sulfide and mercaptans, further deteriorating water quality. Wastewater discharged from hospital clinics, laboratories, wards, and laundry rooms is particularly complex in origin and composition. Hospital wastewater contains large amounts of pathogenic bacteria, viruses, and chemical agents, exhibiting characteristics of spatial pollution, acute infectiousness, and latent infectiousness. The discharge of medical wastewater causes enormous harm to water resources and has become a major source of harm to public health.

[0003] During their operation, hospitals inevitably generate wastewater with direct or indirect infectiousness, toxicity, and other hazards. The sources of this wastewater determine its complex composition, involving various biological, chemical, and radioactive contaminants. Medical wastewater contains not only large amounts of pathogens such as bacteria, viruses, and parasite eggs, but also chemical agents and radioactive isotopes, exhibiting several characteristics including spatial pollution, acute infection, and latent infection. If medical wastewater containing pathogenic microorganisms is discharged directly into urban sewers without disinfection, inactivation, or other harmless treatment, it often causes water and soil pollution, and in severe cases, can trigger various diseases or lead to outbreaks of waterborne infectious diseases. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a wastewater treatment device with sterilization and disinfection functions, comprising an ozone aeration tank, a flocculation sedimentation tank, a biological treatment tank, a sludge incinerator, and a waste gas combustion system. Its features include: wastewater first enters the ozone aeration tank through the inlet, and after ozone aeration, flows into the flocculation sedimentation tank through the outlet. After sedimentation in the flocculation sedimentation tank, the wastewater overflows from the overflow outlet into the biological treatment tank, where it undergoes biological treatment to meet discharge standards; the sludge settled at the bottom of the flocculation sedimentation tank is collected by a sludge scraper, dewatered by a sludge dewatering device, and then sent to the sludge incinerator for incineration and harmless treatment; the waste gas generated during wastewater treatment is collected, aggregated, and then treated by the waste gas combustion system before being released into the atmosphere.

[0005] The ozone aeration tank is a cylindrical tank with a sewage inlet and a sewage outlet symmetrically located in the middle of the tank. An ozone aeration valve is installed at the bottom of the tank, which is connected to an ozone generator via a Roots blower. An exhaust gas outlet is installed at the top of the tank.

[0006] The upper part of the flocculation sedimentation tank is equipped with a waste gas collection hood. The waste gas pipe of the waste gas collection hood is connected to the waste gas discharge port at the top of the ozone aeration tank. After passing through the filter, the waste gas is pressurized by the booster fan and then enters the waste gas combustion system. After entering the waste gas combustion system, the waste gas first undergoes heat exchange through a heat exchanger to raise the initial temperature of the waste gas. Then it enters the combustion chamber for combustion, which oxidizes and decomposes the VOCs in the waste gas into CO2 and H2O before being discharged. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the process flow of this utility model.

[0008] In the diagram: 1. Ozone aeration tank, 2. Roots blower, 3. Ozone generator, 4. Flocculation sedimentation tank, 5. Sludge scraper conveyor, 6. Biochemical treatment tank, 7. Waste gas collection hood, 8. Sludge dewatering device, 9. Sludge incinerator, 10. Waste gas combustion system, 11. Burner, 12. Heat exchanger, 13. Filter, 14. Booster blower, 15. Chimney. Detailed Implementation

[0009] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0010] This utility model provides a wastewater treatment device with sterilization and disinfection functions, comprising an ozone aeration tank 1, a flocculation sedimentation tank 4, a biochemical treatment tank 6, a sludge incinerator 9, and a waste gas combustion system 10. The device is characterized in that: wastewater first enters the ozone aeration tank 1 through its inlet, and after ozone aeration, it enters the flocculation sedimentation tank 4 through its outlet. After sedimentation in the flocculation sedimentation tank 4, the wastewater overflows from the overflow outlet into the biochemical treatment tank 6, where it is treated to meet discharge standards. The sludge settled at the bottom of the flocculation sedimentation tank 4 is collected by a sludge scraper 5, dewatered by a sludge dewatering device 8, and then sent to the sludge incinerator 9 for incineration and harmless treatment. The waste gas generated during the wastewater treatment process is collected and sent to the waste gas combustion system 10 for treatment before being discharged into the atmosphere.

[0011] The ozone aeration tank 1 is a cylindrical tank with a sewage inlet and a sewage outlet symmetrically located in the middle of the tank. An ozone aeration valve is provided at the bottom of the tank, and the ozone aeration valve is connected to the ozone generator 3 via a Roots blower 2. An exhaust gas outlet is provided at the top of the tank.

[0012] The upper part of the flocculation sedimentation tank 4 is equipped with a waste gas collection hood 7. The waste gas collected by the waste gas collection hood 7 is collected by the pipeline and then converged with the waste gas discharge port at the top of the ozone aeration tank 1. After passing through the filter 13, it is pressurized by the booster fan 14 and then enters the waste gas combustion system 10. After entering the waste gas combustion system 10, the waste gas first undergoes heat exchange through the heat exchanger 12 to raise the initial temperature of the waste gas. Then it enters the combustion chamber 11 for combustion, which oxidizes and decomposes the VOCs in the waste gas into CO2 and H2O before being discharged.

[0013] The wastewater treated by this invention is first sterilized and disinfected by ozone aeration, which can kill bacterial vegetative cells and spores, viruses, fungi, etc., and destroy endotoxins. After ozone treatment, the bacterial removal rate in the water is over 99.98%, organic matter removal is 40%, color removal is 77%, nitrite removal is 79.5%, and protein-like ammonia removal is 11.9%. The waste gas generated during the treatment process is treated by regenerative thermal oxidative combustion, which oxidizes and decomposes the VOCs in the waste gas into CO2 and H2O, while further preventing the emission of bacteria and viruses carried away by volatile organic compounds. The sludge generated during the wastewater treatment process is incinerated in a sludge incinerator, which not only prevents the escape of bacteria and viruses, but also allows for resource utilization.

Claims

1. A sewage treatment device with sterilization and disinfection function, which is composed of an ozone aeration tank (1), a flocculation and sedimentation tank (4), a biochemical treatment tank (6), a sludge incinerator (9) and a waste gas combustion system (10), characterized in that: The sewage first enters the ozone aeration tank (1) through the sewage inlet, is aerated by ozone, and then is discharged from the sewage outlet of the ozone aeration tank (1) into the flocculation sedimentation tank (4). The sewage is deposited in the flocculation sedimentation tank (4) and is discharged from the overflow port into the biochemical treatment tank (6) to achieve standard discharge after biochemical treatment. The sludge deposited at the bottom of the flocculation sedimentation tank (4) is collected by the sludge scraper (5), is dewatered by the sludge dewatering device (8), and is then sent into the sludge incinerator (9) for incineration. The waste gas generated during the sewage treatment process is collected and sent into the waste gas combustion system (10) for treatment and then is discharged into the atmosphere.

2. The sewage treatment device with sterilization and disinfection functions according to claim 1, characterized in that: The ozone aeration tank (1) is a cylindrical tank body. The sewage inlet and the sewage outlet are symmetrically arranged at the middle position of the tank body. The ozone aeration valve is arranged at the bottom of the tank body. The ozone aeration valve is connected to the Roots blower (2) and the ozone generator (3). The waste gas discharge port is arranged at the top of the tank body.

3. The sewage treatment device with sterilization and disinfection functions according to claim 1, characterized in that: The upper part of the flocculation sedimentation tank (4) is provided with the waste gas collecting cover (7). The waste gas collected by the waste gas collecting cover (7) is collected through the pipeline and the waste gas discharge port at the top of the tank body of the ozone aeration tank (1), is filtered by the filter (13), is pressurized by the booster fan (14), and then is sent into the waste gas combustion system (10). After entering the waste gas combustion system (10), the waste gas is first heated by the heat exchanger (12) to increase the initial temperature of the waste gas, is then burned in the combustion chamber (11), and is finally discharged.

Images