Medical sewage treatment equipment and method thereof

Abstract

The invention provides medical sewage treatment equipment and a method thereof.The medical sewage treatment equipment comprises a machine shell and a motor, the motor is fixedly connected with the machine shell, a disinfection chamber is arranged in the machine shell, a photocatalytic inclined plate and an ultraviolet lamp are arranged in the disinfection chamber, the ultraviolet lamp is arranged above the photocatalytic inclined plate, the photocatalytic inclined plate is fixedly connected with a supporting frame, and the supporting frame is further fixedly connected with one end of a pull rod; the other end of the pull rod serves as a contact which abuts against the peripheral face of the flywheel, the flywheel is fixedly connected with an output shaft of the motor, the pull rod further penetrates through the spring, and the spring is arranged between the machine shell and the contact. By the adoption of the technical scheme, in the sewage purification treatment process, the motor drives the flywheel to rotate, the pull rod vibrates up and down in the vertical direction in a reciprocating mode, sediment attached to the surface of the photocatalytic inclined plate is shaken off, dirt attached to the surface of the photocatalytic inclined plate can be reduced, the cleaning frequency of maintenance personnel for the photocatalytic inclined plate is reduced, and the service life of the photocatalytic inclined plate is prolonged. The interruption of a normal production order is avoided, and the sewage treatment efficiency and the economic benefits of enterprises are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a medical sewage treatment process and sewage treatment equipment. Background Art

[0002] With the continuous high-speed and high-quality development of China's economy and the continuous improvement of people's living standards, small medical institutions have been gradually built and improved. However, the wastewater disposal of small medical institutions has always been a hot topic in society. Medical wastewater contains pathogenic microorganisms, toxic and harmful physical and chemical pollutants, radioactive pollution, etc., and has characteristics such as spatial pollution, acute infection, and latent infection. Without effective treatment, it will become an important way for the spread of diseases and seriously pollute the environment. Medical wastewater has the characteristics of small water volume, large water quality difference, complex pollutant composition, etc. At present, the medical wastewater treatment process is "hydrolysis acidification + biological contact oxidation + chlorine disinfection". This biological treatment process has the advantages of reliable operation, good treatment effect, and mature technology. However, this process has problems such as high investment cost, large floor area, personnel on duty, sludge disposal, large operation and maintenance difficulty, and the need to observe the growth status of microorganisms in real time.

[0003] For the wastewater disposal of small medical institutions, "grid flocculation + inclined plate photocatalytic oxidation" can be used to remove pollutants and disinfect and sterilize hospital wastewater. The water quality after treatment by this device meets the pretreatment standard requirements of the "Discharge Standard of Water Pollutants for Medical Institutions" (GB18466-2005). Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a medical wastewater treatment process of "grid flocculation + inclined plate photocatalytic oxidation" using wastewater treatment equipment.

[0005] The present invention is achieved through the following technical solutions.

[0006] A medical wastewater treatment process of "grid flocculation + inclined plate photocatalytic oxidation" provided by the present invention uses medical wastewater treatment equipment, and includes the following steps:

[0007] The equipment main body is composed of a flocculation tank, a sedimentation and catalytic tank, and a clear water tank;

[0008] The wastewater enters the 4-layer grid through the water inlet pipe for flocculation. The flocculated wastewater enters the mud hopper for sedimentation. The upper part of the sedimentation area is provided with photocatalytic inclined plates. The wastewater undergoes inclined plate sedimentation, photocatalytic oxidation, and coupled disinfection on the photocatalytic inclined plates. The wastewater after photocatalytic oxidation enters the clear water tank through the triangular weir trough, and the effluent is discharged.

[0009] A wastewater treatment equipment of the present application includes:

[0010] The equipment main body, inside the equipment main body;

[0011] Flocculant chemical tank, metering pump, aeration blower, pressure type liquid level gauge, sludge discharge electric valve, flushing water pump, automatic control system.

[0012] It also includes an inlet pipe which is connected to the flocculation tank by inletting water from the upper part.

[0013] It also includes a flocculant chemical inlet pipe which is connected to the flocculation tank by inletting medicine from the upper part.

[0014] It also includes a flocculation grid assembly arranged in the flocculation tank, which is a 4-layer grid used for the full mixing of wastewater and flocculant chemical.

[0015] It also includes a flocculation tank connecting pipe. Through the flocculation tank connecting pipe, the flocculated wastewater enters the sedimentation and catalytic tank.

[0016] It also includes a flushing water pump used for sucking the clear water in the clear water tank for pressurized flushing.

[0017] It also includes a pressure type liquid level gauge used for detecting the liquid levels of the sedimentation and catalytic tank and the clear water tank, controlling the opening / closing of the electric sludge discharge valve, and realizing the automatic control of the electric sludge discharge valve.

[0018] It also includes a sludge discharge electric valve used for automatic sludge discharge.

[0019] It also includes an automatic control system which adopts PLC technology to realize the full-automatic operation of the equipment.

[0020] It also includes the mud hopper of the sedimentation and catalytic tank used for the compaction of the settled sludge. A mud guiding plate is also arranged in the sedimentation tank, and the included angle between the mud guiding plate and the horizontal plane is 60°, which is more conducive to sludge discharge.

[0021] It also includes an aeration pipe (perforated air nozzle), an aeration flushing ultraviolet lamp tube and a photocatalytic inclined plate assembly arranged in the sedimentation and catalytic tank to improve the photocatalytic efficiency and the disinfection and sterilization effect.

[0022] It also includes a photocatalytic inclined plate assembly arranged in the sedimentation and catalytic tank. The photocatalytic inclined plate assembly can effectively degrade COD Cr , anionic surfactant, and at the same time effectively remove suspended solids. Through the inclined plate design, the sedimentation load is effectively improved.

[0023] It also includes a triangular weir trough arranged in the sedimentation and catalytic tank, which effectively solves the uniformity of the effluent and prevents the situation of effluent side flow.

[0024] The photocatalytic inclined plate assembly includes a vibrator. The vibrator runs intermittently to shake the ultraviolet lamp tube and the photocatalytic inclined plate assembly to improve the photocatalytic efficiency and the disinfection and sterilization effect.

[0025] The photocatalytic inclined plate assembly further includes a flushing pipeline (the nozzle angle is parallel to the inclined plate, and at the same time, the turbidity sensor is flushed), the ultraviolet lamp is flushed, and the photocatalytic inclined plate assembly is flushed to improve the photocatalytic efficiency and disinfection and sterilization effect.

[0026] The photocatalytic inclined plate assembly includes a turbidity sensor for detecting the turbidity of the wastewater after passing through the inclined plate and determining the start of the cleaning device. The photocatalytic inclined plate uses aluminum as the base material, and the surface coating material is TiO 2 , and the specific surface area is not less than 400 m 2 / g, and the ultraviolet light-assisted photocatalytic disinfection rate reaches 99.9%.

[0027] It further includes a machine shell and a motor. The motor is fixedly connected to the machine shell. A disinfection chamber is provided inside the machine shell. A photocatalytic inclined plate and an ultraviolet lamp are provided inside the disinfection chamber. The ultraviolet lamp is arranged above the photocatalytic inclined plate. The photocatalytic inclined plate is fixedly connected to a support frame. One end of the support frame is also fixedly connected to one end of a pull rod. The other end of the pull rod serves as a contact head, and the contact head abuts against the outer peripheral surface of a flywheel. The flywheel is fixedly connected to the output shaft of the motor. The pull rod also penetrates through a spring, and the spring is arranged between the machine shell and the contact head.

[0028] The semi-circular wheel, sector wheel or cam.

[0029] The length direction of the pull rod is parallel to the vertical plane.

[0030] A flocculation reaction chamber, a sedimentation tank and a clear water tank are also provided inside the machine shell. The flocculation reaction chamber is communicated with the sedimentation tank. The sedimentation tank is communicated with the disinfection chamber. An overflow hole is provided between the disinfection chamber and the clear water tank.

[0031] The overflow hole is triangular.

[0032] The sedimentation tank is arranged below the disinfection chamber, and an aeration pipe is also provided between the sedimentation tank and the disinfection chamber.

[0033] A plurality of perforated plates are also provided inside the flocculation reaction chamber, and the plurality of perforated plates are arranged at equal intervals along the vertical direction.

[0034] The sewage treatment equipment further includes a sludge discharge pipe. One end of the sludge discharge pipe is communicated with the sedimentation tank, and the other end of the sludge discharge pipe extends outside the sedimentation tank.

[0035] The sewage treatment equipment further includes a drain pipe. One end of the drain pipe is communicated with the clear water tank, and the other end of the drain pipe extends outside the clear water tank.

[0036] The beneficial effects of the present invention are as follows:

[0037] (1) Flocculation sedimentation mainly solves the suspended solids in wastewater. Compared with the traditional biological contact oxidation method, the concentration of suspended solids in wastewater is low, greatly reducing the dosage of flocculation agents and the sludge production, and reducing the sludge disposal risk.

[0038] (2) Compared with the traditional "hydrolysis acidification + biological contact oxidation + chlorine disinfection" process, the "grid flocculation + inclined plate photocatalytic oxidation" has lower investment costs and fewer structure units; for the physicochemical treatment method, it is not necessary to observe the growth state of microorganisms in real time.

[0039] (3) Inclined plate photocatalysis: Coupling disinfection and co-disposing pollutants. Ultraviolet light and TiO 2 carry out photocatalytic reaction, and the generated hydroxyl radicals (·OH) and superoxide radicals (·O 2 -) synergistically with ultraviolet light kill the pathogenic bacteria, pathogens and viruses in water, and at the same time utilize the strong oxidizing properties of hydroxyl radicals (·OH) and superoxide radicals (·O 2 -) to effectively degrade indexes such as COD Cr , anionic surfactant, ammonia nitrogen, etc. The inclined plate photocatalytic component effectively removes suspended solids, effectively improves the flocculation sedimentation load, and ensures that the suspended solids in the effluent meet the standards.

[0040] (4) The mechanical jitter + aeration stripping + spraying combined flushing technology efficiently flushes the ultraviolet lamp tubes and the photocatalytic inclined plate components, ensuring high ultraviolet light penetration and at the same time solving the problem of adhesion of ultraviolet lamps and catalytic materials.

[0041] (5) A turbidity sensor is set to detect turbidity, and at the same time, the turbidity signal is used as a full-automatic cleaning signal to realize the full-automatic operation of the equipment without the need for personnel on duty. Brief Description of the Drawings

[0042] Figure 1 is the axonometric drawing of the present invention;

[0043] Figure 2 is the sectional view of the present invention;

[0044] Figure 3 is the connection schematic diagram of the motor, photocatalytic plate, support frame and pull rod of the present invention.

[0045] In the figure: 1 - housing, 2 - motor, 3 - disinfection chamber, 4 - photocatalytic inclined plate, 5 - ultraviolet lamp, 6 - support frame, 7 - pull rod, 8 - contact, 9 - flywheel, 10 - spring, 11 - flocculation reaction chamber, 12 - sedimentation tank, 13 - clear water tank, 14 - overflow hole, 15 - aeration pipe, 16 - mud guide plate, 17 - perforated plate, 18 - sludge discharge pipe, 19 - drain pipe. Detailed Embodiments

[0046] The technical solution of the present invention will be further described below, but the scope of protection claimed is not limited thereto.

[0047] As Figures 1 to 3 shown, the present invention provides a sewage treatment device, including a casing 1 and a motor 2. The motor 2 is fixedly connected to the casing 1. A disinfection chamber 3 is provided inside the casing 1. A photocatalytic inclined plate 4 and an ultraviolet lamp 5 are provided inside the disinfection chamber 3, and the ultraviolet lamp 5 is arranged above the photocatalytic inclined plate 4. The photocatalytic inclined plate 4 is fixedly connected to a support frame 6. One end of the support frame 6 is also fixedly connected to a pull rod 7. The other end of the pull rod 7 serves as a contact 8, and the contact 8 abuts against the outer peripheral surface of a flywheel 9. The flywheel 9 is fixedly connected to the output shaft of the motor 2. The pull rod 7 also penetrates through a spring 10, and the spring 10 is arranged between the casing 1 and the contact 8.

[0048] Adopting the technical solution of the present invention, wastewater enters the upper part of the flocculation tank through the water inlet pipe. After sufficient flocculation reaction by the flocculation grid assembly in the flocculation tank, through the flocculation tank connecting pipe, the flocculated wastewater enters the sedimentation and catalytic tank. Flocculation is mainly used to remove suspended solids in the wastewater. Since the concentration of suspended solids in the wastewater is low, most of the flocs precipitate in the mud hopper. The separated wastewater after sedimentation passes through the photocatalytic inclined plate assembly, and after inclined plate sedimentation, photocatalytic oxidation and coupled disinfection, it enters the clear water tank through the triangular weir trough, and the effluent is discharged.

[0049] In addition, during the purification process of the sewage, the motor drives the flywheel to rotate, causing the pull rod to reciprocate up and down in the vertical direction, thereby shaking off the sediment attached to the surface of the photocatalytic inclined plate into the sedimentation tank for collection. It can reduce the dirt attached to the surface of the photocatalytic inclined plate. The mechanical shaking + aeration stripping + spraying combined flushing technology efficiently flushes the ultraviolet lamp tube and the photocatalytic inclined plate assembly, ensuring high ultraviolet penetrability, and at the same time solving the problem of the attachment of the ultraviolet lamp and the catalytic material.

[0050] Specifically, a semi-circular wheel, a sector wheel or a cam is preferably used. The length direction of the pull rod 7 is parallel to the vertical plane.

[0051] In addition, a flocculation reaction chamber 11, a sedimentation tank 12 and a clear water tank 13 are also provided inside the casing 1. The flocculation reaction chamber 11 is communicated with the sedimentation tank 12, the sedimentation tank 12 is communicated with the disinfection chamber 3, and an overflow hole 14 is provided between the disinfection chamber 3 and the clear water tank 13. The overflow hole 14 is preferably triangular.

[0052] In addition, the sedimentation tank 12 is arranged below the disinfection chamber 3, and an air supply pipe 15 is also provided between the sedimentation tank 12 and the disinfection chamber 3. The air supply pipe 15 is communicated with a blower arranged outside the sewage treatment device, which is beneficial to improving the sewage purification effect.

[0053] Specifically, a sludge guiding plate 16 is further provided in the sedimentation tank 12, and the inclination angle between the sludge guiding plate 16 and the horizontal plane is greater than zero. A plurality of perforated plates 17 are further provided in the flocculation reaction chamber 11, and the plurality of perforated plates 17 are arranged at equal intervals along the vertical direction. The sewage treatment equipment further includes a sludge discharge pipe 18, one end of the sludge discharge pipe 18 is communicated with the sedimentation tank 12, and the other end of the sludge discharge pipe 18 extends out of the sedimentation tank 12. The sewage treatment equipment further includes a drain pipe 19, one end of the drain pipe 19 is communicated with the clear water tank 13, and the other end of the drain pipe 19 extends into the clear water tank 13.

[0054] Control process

[0055] (1) Equipment operation

[0056] After the water inlet is started, the flocculation agent dosing is started synchronously, the ultraviolet lamp tube is turned on synchronously, the turbidity sensor is started, the turbidity of the wastewater after passing through the inclined plate is detected, whether the cleaning device needs to be cleaned is judged, and the electric sludge discharge valve is in the closed state.

[0057] (2) Cleaning operation of the photocatalytic inclined plate assembly

[0058] The turbidity sensor receives the signal, and when the turbidity value rises ≥ 20% of the set value, the cleaning program of the photocatalytic inclined plate assembly is executed.

[0059] The following steps are executed: After the mechanical jitter and aeration stripping are started for 10 minutes, the electric drain valve is opened to drain the sludge. After draining to the set liquid level of the pressure type liquid level gauge, the electric valve is closed;

[0060] The flushing water pump is started, and the ultraviolet lamp, the photocatalytic inclined plate and the turbidity sensor are flushed through the high-pressure nozzle for 5 - 10 minutes. After the flushing is completed, the electric drain valve is opened. After draining to the set liquid level of the pressure type liquid level gauge, the electric valve is closed, and the automatic operation of the equipment is restored.

[0061] Implementation case

[0062] Taking a 10m 3 / d township health center as an implementation case, the treatment effect is as follows:

[0063] Treatment effect of a certain medical wastewater

[0064]

Claims

1. A sewage treatment equipment, characterized in that: The invention comprises a casing (1) and a motor (2), wherein the motor (2) is fixedly connected to the casing (1), a disinfection chamber (3) is arranged in the casing (1), a photocatalytic inclined plate (4) and an ultraviolet lamp (5) are arranged in the disinfection chamber (3), and the ultraviolet lamp (5) is arranged above the photocatalytic inclined plate (4), the photocatalytic inclined plate (4) is fixedly connected to a support frame (6), the support frame (6) is also fixedly connected to one end of a pull rod (7), the other end of the pull rod (7) serves as a contact (8), the contact (8) abuts against the outer peripheral surface of a flywheel (9), the flywheel (9) is fixedly connected to the output shaft of the motor (2), the pull rod (7) also passes through a spring (10), and the spring (10) is arranged between the casing (1) and the contact (8).

2. The sewage treatment equipment according to claim 1, characterized in that: The semicircular wheel, fan-shaped wheel or cam.

3. The sewage treatment equipment according to claim 1, characterized in that: The length direction of the pull rod (7) is parallel to the vertical plane.

4. The sewage treatment equipment according to claim 1, characterized in that: The housing (1) is further provided with a flocculation reaction chamber (11), a sedimentation tank (12) and a clear water tank (13); the flocculation reaction chamber (11) and the sedimentation tank (12) are interconnected; the sedimentation tank (12) and the disinfection chamber (3) are interconnected; an overflow hole (14) is provided between the disinfection chamber (3) and the clear water tank (13).

5. The sewage treatment equipment according to claim 4, characterized in that: The overflow hole (14) is in the shape of a triangle.

6. The sewage treatment equipment according to claim 4, characterized in that: The sedimentation tank (12) is arranged below the disinfection chamber (3), and an aeration pipe (15) is also arranged between the sedimentation tank (12) and the disinfection chamber (3).

7. The sewage treatment equipment according to claim 4, characterized in that: A mud guide plate (16) is also provided in the sedimentation tank (12), and the inclination angle between the mud guide plate (16) and the horizontal plane is greater than zero.

8. The sewage treatment equipment according to claim 4, characterized in that: A plurality of mesh plates (17) are also provided in the flocculation reaction chamber (11), and the plurality of mesh plates (17) are arranged at equal intervals along the vertical direction.

9. The sewage treatment equipment according to claim 4, characterized in that: The sewage treatment equipment further comprises a mud discharge pipe (18), one end of which is connected to the sedimentation tank (12), and the other end of which extends out of the sedimentation tank (12).

10. The sewage treatment equipment according to claim 4, characterized in that: The sewage treatment equipment also includes a drainage pipe (19), one end of which is connected to the clean water tank (13), and the other end of which extends out of the clean water tank (13).

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