CN215480373U

CN215480373U - Medical wastewater treatment system

Info

Publication number: CN215480373U
Application number: CN202120124312.9U
Authority: CN
Inventors: 邱敬贤; 曾木平; 陈帅奇; 何曦
Original assignee: Changsha Industrial Research Institute Environmental Protection Co Ltd
Current assignee: Changsha Industrial Research Institute Environmental Protection Co Ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2022-01-11
Anticipated expiration: 2031-01-18

Abstract

The utility model discloses a medical wastewater treatment system, which comprises a UV photolysis odor treatment device, an air blower and a reaction tank unit, wherein the reaction tank unit is formed by combining a pre-disinfection tank, an adjusting tank, an anaerobic tank, an anoxic tank, an aerobic tank, an MBR membrane tank, a deep disinfection tank and a clean water tank, and is communicated with the UV photolysis odor treatment device through a gas collecting pipe; aeration structures for supplying air through air blowers are arranged in the anoxic tank, the aerobic tank and the MBR membrane tank; an MBR membrane system is arranged in the MBR membrane tank, the MBR membrane system is provided with an ultrasonic cleaning device, and the water outlet end of the MBR membrane system is communicated with the deep disinfection tank through a water production pipe with a water production pump. The utility model provides a medical wastewater treatment system has compromise waste water, exhaust-gas treatment, has advantages such as sewage treatment is effectual, disinfection can reinforce, anti load strikes strongly, has realized the ultrasonic wave self-cleaning of MBR membrane simultaneously again, has not only reduced secondary pollution, has reduced the maintenance frequency of membrane moreover, convenient management.

Description

Medical wastewater treatment system

Technical Field

The utility model relates to the technical field of wastewater treatment, in particular to a medical wastewater treatment system.

Background

The medical wastewater contains a large amount of pathogens such as germs, viruses, parasitic ova and the like, the viruses, the germs and the parasitic ova have stronger survival rate and adaptability in a normal temperature environment, can survive for a longer time in the sewage, and inevitably pollute water sources and spread diseases if discharged, so the pollution must be eliminated at the source, and the strict control on the disinfection link is strengthened.

Some medical wastewater treatment systems or processes appear at present, for example, a chinese patent with application number 201711325217.X discloses a medical wastewater treatment system, which comprises a water inlet pipe, a water outlet pipe, and a disinfection tank, an adjusting tank, an acid-base tank, an anaerobic tank, an aerobic tank, a flocculation sedimentation tank and a sludge tank which are connected in sequence; the water inlet pipe is connected to the disinfection tank, the water outlet pipe is connected to the flocculation sedimentation tank, and the adjusting tank is provided with a material pipeline connected to the sludge tank. According to the medical wastewater treatment system, the disinfection tank is arranged in front of other treatment tanks, and the medical wastewater is subjected to virus killing and sterilization treatment, so that secondary pollution of pathogenic microorganisms in the medical wastewater to the next batch of medical wastewater due to diffusion of the pathogenic microorganisms in a subsequent device along with the treatment process is avoided, and the risk of diffusion of the pathogenic microorganisms is reduced; the chemical method is adopted to kill pathogenic microorganisms, and the disinfection effect is good. Also, for example, chinese patent application No. 201510377052.5 discloses a three-stage treatment process for medical wastewater, which adopts a staged treatment method, and can remove different pollutants in the medical wastewater by using different treatment methods, thereby achieving efficient purification of the medical wastewater. Although the medical wastewater treatment system or process realizes the disinfection and purification of medical wastewater to a certain extent, the following disadvantages still exist: 1. waste gas generated in the waste water treatment process cannot be treated, so that the probability of pathogen transmitting diseases through the waste gas is not reduced; 2. generally, only primary disinfection is carried out, and the disinfection effect is limited; 3. membrane filtration systems are typically backwashed with chemicals, which increase the probability of secondary contamination to some extent. In addition, the medical wastewater has complex components, large water quantity change and strong impact load on a treatment system, and the load impact resistance of the existing treatment system is relatively limited.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a medical wastewater treatment system, so as to treat wastewater and waste gas, improve the wastewater treatment effect, disinfection capability and load impact resistance, and reduce secondary pollution.

The utility model solves the problems through the following technical means:

a medical wastewater treatment system comprises a UV photolysis odor treatment device, an air blower and a reaction tank unit which is formed by combining a pre-disinfection tank, an adjusting tank, an anaerobic tank, an anoxic tank, an aerobic tank, an MBR membrane tank, a deep disinfection tank and a clean water tank, wherein the reaction tank unit runs in a sealing mode and is communicated with the UV photolysis odor treatment device through a gas collecting pipe at the top; aeration structures are arranged in the anoxic tank, the aerobic tank and the MBR membrane tank, and the aeration structures are communicated with an air blower through an airflow pipeline; an MBR membrane system is arranged in the MBR membrane tank, the MBR membrane system is provided with an ultrasonic cleaning device, the water outlet end of the MBR membrane system is communicated with the deep disinfection tank through a water production pipe, and a water production pump is arranged on the water production pipe.

Further, the ultrasonic cleaning device comprises an ultrasonic generator and at least one ultrasonic transducer fixed on the MBR membrane system.

Further, be provided with the gas stripping type between good oxygen pond and the oxygen deficiency pond and nitrify liquid reflux unit, the gas stripping type nitrifies liquid reflux unit and includes nitrify liquid back flow and gas stripping pipe one, gas stripping pipe one is through air flow pipeline and air-blower intercommunication.

Further, an air-lift sludge reflux device is arranged between the MBR membrane tank and the anaerobic tank, the air-lift sludge reflux device comprises a sludge reflux pipe and a second air-lift pipe, and the second air-lift pipe is communicated with the air blower through an airflow pipeline.

Further, still include sludge treatment equipment, the bottom in anaerobism pond, oxygen deficiency pond, good oxygen pond, MBR membrane cisterna all is equipped with row's mud branch pipe, arrange the mud branch pipe and be responsible for through row's mud and assemble back and sludge treatment equipment intercommunication, be provided with the mud valve on arranging the mud branch pipe, it is provided with the mud pump to arrange to be responsible for.

Furthermore, a regulating tank liquid level meter and an MBR membrane tank liquid level meter are respectively arranged in the regulating tank and the MBR membrane tank.

Furthermore, the sequential turning-back circulation of water flow is realized among the pre-disinfection tank, the regulating tank, the anaerobic tank, the anoxic tank, the aerobic tank and the MBR membrane tank through any one of an overflowing hole, an overflowing pipe or a submersible pump lifting device.

Furthermore, a grid is arranged at the communication position of the pre-disinfection tank and the adjusting tank.

Further, the aeration structures in the anoxic tank and the MBR membrane tank are respectively an aeration pipe I and an aeration pipe II, and the aeration structure in the aerobic tank is an aeration disc.

Further, a pre-aeration system is arranged in the adjusting tank.

The utility model has the beneficial effects that: the utility model provides a medical wastewater treatment system, to disinfect the pond in advance, the equalizing basin, the anaerobism pond, the oxygen deficiency pond, good oxygen pond, the MBR membrane cisterna, degree of depth disinfection pond, the clean water basin, UV photodissociation odor treatment device and ultrasonic cleaning device etc. combine, impact load is strong, on the one hand, adopt disinfection in advance, ultrasonic treatment medical wastewater is united in the dual disinfection of degree of depth disinfection, the effect of getting rid of the pathogen has been ensured, medical wastewater's processing up to standard has been realized, on the other hand, handle the waste gas that produces in the waste water treatment process through UV photodissociation odor treatment device, the probability that the pathogen passes through the exhaust-gas propagation disease has been reduced. In addition, adopt ultrasonic cleaning device, realized the self-cleaning of MBR membrane, need not chemical backwash, reduced the input volume of medicament, reduced secondary pollution, simultaneously, reduced the maintenance frequency of membrane, convenient management. Therefore, the utility model gives consideration to the treatment of wastewater and waste gas, has the advantages of good sewage treatment effect, strong disinfection capability, strong load impact resistance and the like, realizes the ultrasonic self-cleaning of the MBR membrane, reduces the secondary pollution, reduces the maintenance frequency of the membrane and is convenient to manage.

Drawings

The utility model is further described below with reference to the figures and examples.

FIG. 1 is a schematic structural diagram of the present invention.

Reference numerals:

1. a pre-disinfection tank; 2. a grid; 3. a regulating tank liquid level meter; 4. a regulating tank; 5. a submersible pump; 6. an anaerobic tank; 7. an anoxic tank; 8. an aerobic tank; 9. a first aeration pipe; 10. an aeration disc; 11. an overflow pipe; 12. a nitrifying liquid return pipe; 13. a second aeration pipe; 14. MBR membrane system; 15. an ultrasonic transducer; 16. a second gas stripping pipe; 17. a sludge return pipe; 18. MBR membrane pool level gauge; 19. an MBR membrane tank; 20. a deep disinfection tank; 21. A clean water tank; 22. a sludge discharge pump; 23. an ultrasonic generator; 24. a mud valve; 25. a blower; 26. a water production pump; 27. a first gas stripping pipe; 28. a sludge treatment device; 29. a UV photolysis odor treatment device; 30. a gas collecting pipe.

Detailed Description

The utility model is explained in more detail below with reference to the figures and examples. The features and advantages of the present invention will become more apparent from the description. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments.

As shown in fig. 1, the medical wastewater treatment system of the present embodiment includes a pre-sterilization tank 1, a conditioning tank 4, an anaerobic tank 6, an anoxic tank 7, an aerobic tank 8, an MBR membrane tank 19, a deep sterilization tank 20, a clean water tank 21, a UV photolysis odor treatment device 29, and a blower 25; the pre-disinfection tank, the regulating tank, the anaerobic tank, the anoxic tank, the aerobic tank and the MBR membrane tank realize the sequential return circulation of water flow through any one of an overflowing hole, an overflowing pipe or a submersible pump lifting device; and the deep disinfection tank and the clean water tank are communicated through the overflowing hole at the top. In the embodiment, the disinfection tank is communicated with the regulating tank through an overflowing hole at the top, and a grid 2 is arranged at the overflowing hole so as to remove particles and suspended matters in the wastewater; the adjusting tank is communicated with the anaerobic tank through a submersible pump lifting device, particularly, two submersible pumps 5 are arranged in the adjusting tank, one submersible pump works and the other submersible pump is standby, the water outlet end of each submersible pump is communicated with the anaerobic tank through a lifting pipe, each submersible pump is provided with a floating ball liquid level meter, and the start and stop of each submersible pump are controlled through a corresponding control system; the anaerobic tank and the anoxic tank are communicated through a flow hole at the bottom; the anoxic tank and the aerobic tank are communicated through a flow pipe 11, and the flow pipe extends to the bottom of the aerobic tank; the aerobic tank is communicated with the MBR membrane tank through an overflowing hole at the top.

The pre-disinfection tank, the regulating tank, the anaerobic tank, the anoxic tank, the aerobic tank, the MBR membrane tank, the deep disinfection tank and the clean water tank are combined into a reaction tank unit, the reaction tank unit operates in a sealing way, and the top of the reaction tank unit is communicated with a UV photolysis odor treatment device 29 through a gas collecting pipe 30; waste gas generated in the whole system operation process is collected through the gas collecting pipe, and the waste gas is collected and enters the UV photolysis odor treatment device to be treated and then is discharged up to the standard.

The pre-disinfection tank is sealed at a micro negative pressure, the disinfectant added in the pre-disinfection tank is one of sodium hypochlorite, chlorine tablets, ozone, chlorine dioxide and liquid chlorine, preferably the sodium hypochlorite, and the disinfection time is not less than 0.5 h.

Be provided with equalizing basin level gauge 3 and pre-aeration system in the equalizing basin, the equalizing basin level gauge is preferably ultrasonic wave level gauge, and the floating ball level gauge coordinated control of equalizing basin level gauge and immersible pump from the area to carry out feedback monitoring to the equalizing basin liquid level. The pre-aeration system is a conventional aeration system, details are not shown, through aeration of the pre-aeration system, dechlorination treatment can be carried out on the wastewater, the influence of chlorine on the biochemical system is reduced, and meanwhile, airflow plays a role in stirring and uniformly mixing, so that precipitation and odor generated in an anaerobic process are prevented.

The aeration device is characterized in that a first aeration pipe 9, an aeration disc 10 and a second aeration pipe 13 are respectively arranged in the anoxic tank, the aerobic tank and the MBR membrane tank, aeration holes of the first aeration pipe and the second aeration pipe face downwards, the first aeration pipe, the aeration disc and the second aeration pipe are respectively communicated with an air blower through air flow pipelines, and aeration air flow is generated through the air blower.

An MBR membrane system 14 and an MBR membrane tank liquid level meter 18 are arranged in the MBR membrane tank, the MBR membrane system is provided with an ultrasonic cleaning device, and the ultrasonic cleaning device comprises an ultrasonic generator 23 and at least one ultrasonic transducer 15 fixed on a membrane frame of the MBR membrane system; the MBR membrane system is subjected to radiation oscillation cleaning by using turbulent flow, cavitation and oscillation generated by ultrasonic waves in a water body, a chemical backwashing device is not required to be additionally arranged, and the ultrasonic waves have the auxiliary sterilization effect. By arranging the MBR membrane tank liquid level meter, the operation of the water production system can be controlled according to the height of the liquid level of the MBR membrane tank.

The water outlet end of the MBR membrane system is communicated with the deep disinfection tank through a water production pipe, and a water production pump 26 is arranged on the water production pipe. And the water after membrane filtration flows into a deep disinfection tank through a water production pipe for secondary disinfection, the disinfectant added in the deep disinfection tank is one of sodium hypochlorite, chlorine tablets and chlorine dioxide, preferably sodium hypochlorite, and the disinfection time is not less than 2.0 h. And the effluent of the deep disinfection tank enters a clean water tank, part of the effluent of the clean water tank is used for backwashing the MBR membrane, part of the effluent is discharged after reaching the standard, and part of the effluent is used for dissolving and configuring the medicament.

An air-lift nitrifying liquid reflux device is arranged between the aerobic tank and the anoxic tank, the air-lift nitrifying liquid reflux device comprises a nitrifying liquid reflux pipe 12 and an air-lift pipe 27, and the air-lift pipe is communicated with an air blower through an air flow pipeline. The nitrifying liquid in the aerobic tank can be stripped and returned to the anoxic tank through a nitrifying liquid return pipe.

Be provided with air-lift sludge reflux unit between MBR membrane cisterna and the anaerobism pond, air-lift sludge reflux unit includes sludge return pipe 17 and air-lift pipe two 16, air-lift pipe two is through air flow pipeline and air-blower intercommunication. And the sludge in the MBR membrane tank can be stripped and returned to the anaerobic tank through a sludge return pipe.

The sludge treatment device comprises an anaerobic tank, an anoxic tank, an aerobic tank and an MBR membrane tank, and is characterized by further comprising a sludge treatment device 28, wherein sludge discharge branch pipes are arranged at the bottoms of the anaerobic tank, the anoxic tank, the aerobic tank and the MBR membrane tank, and are communicated with the sludge treatment device after being gathered through a sludge discharge main pipe, and sludge discharge valves 24 are arranged on the sludge discharge branch pipes, wherein the sludge discharge valves of the anaerobic tank, the anoxic tank and the aerobic tank are normally closed, and the sludge discharge valve of the MBR membrane tank is normally open; a sludge pump 22 is arranged on the sludge discharge main pipe. And the sludge in the anaerobic tank, the anoxic tank, the aerobic tank and the MBR membrane tank is disinfected by quicklime in a sludge treatment device and then is transported outside.

The specific working process is as follows:

the medical wastewater is collected and then enters a pre-disinfection tank 1, and the medical wastewater is pre-disinfected by sodium hypochlorite, so that the content of pathogenic microorganisms in the wastewater is reduced, and the infection of operators by the pathogenic microorganisms is reduced; then suspended matters in the wastewater are removed through a grating 2 and then the wastewater enters a regulating tank 4, the wastewater is subjected to conditioning and quantity regulation, aeration is simultaneously carried out, chlorine in the wastewater is removed, the influence of residual chlorine on subsequent biochemical reaction is avoided, and the effluent of the regulating tank 4 is lifted to an anaerobic tank 6 through a submersible pump 5 by the linkage control starting of a floating ball liquid level meter and a regulating tank wave liquid level meter 3; then the sewage and sludge which flows back from the MBR membrane tank 19 through the sludge return pipe 17 are mixed and reacted in the anaerobic tank 6 to remove organic matters and release phosphorus, and the wastewater enters the anoxic tank 7; carrying out denitrification reaction with nitrifying liquid which flows back from the aerobic tank 8 through the nitrifying liquid return pipe 12 under the action of the aeration pipe I9 to remove nitrate nitrogen and organic matters in the wastewater; the effluent of the anoxic tank 7 enters the aerobic tank 8 through the overflow pipe 11, and is subjected to nitrification and phosphorus absorption reaction under the action of the aeration disc 10 to remove ammonia nitrogen, organic matters and phosphorus; the effluent of the aerobic tank 8 enters an MBR membrane tank 19, solid-liquid separation is carried out under the action of an MBR membrane system 14, water is produced under the action of a water production pump 26, the operation of the water production pump 26 is subjected to feedback control according to an MBR membrane tank liquid level meter 18, the MBR membrane system 14 is self-cleaned under the action of an ultrasonic cleaning device, the ultrasonic cleaning device comprises an ultrasonic generator 23 and at least one ultrasonic transducer 15, the ultrasonic transducer 15 is fixed on a membrane frame, the MBR membrane system 14 is subjected to radiation oscillation cleaning by using the turbulent flow, cavitation and oscillation action generated by ultrasonic waves in a water body, a chemical backwashing device is not required to be additionally arranged, and meanwhile, the ultrasonic waves have the function of auxiliary sterilization; the produced water of the MBR membrane tank flows into a deep disinfection tank 20, and is subjected to deep disinfection treatment for 2h under the action of sodium hypochlorite; the effluent of the deep disinfection tank 20 enters a clean water tank 21, part of the effluent is discharged after reaching the standard, and the other part of the effluent is used for dissolving and preparing medicaments. The whole treatment system and the device run in a closed way, and the generated odor is collected by the gas collecting pipe 30 and then enters the UV photolysis odor treatment device 29 for treatment; sludge generated by the system flows into the sludge treatment device 28 through the sludge discharge main pipe under the synergistic action of the sludge discharge valve 24 and the sludge discharge pump 22, and the sludge treatment device 28 adopts quicklime to carry out disinfection treatment on the sludge.

To sum up, the medical wastewater treatment system of this embodiment, to disinfect the pond in advance, the equalizing basin, the anaerobism pond, the oxygen deficiency pond, good oxygen pond, the MBR membrane cisterna, the degree of depth disinfection pond, the clean water basin, UV photodissociation foul smell processing apparatus combines such as ultrasonic cleaning device, impact load resistance is strong, on the one hand, adopt to disinfect in advance, the dual disinfection of degree of depth disinfection unites ultrasonic treatment medical waste water, the effect of getting rid of the pathogen has been ensured, medical waste water's processing up to standard has been realized, on the other hand, the waste gas that produces among the wastewater treatment process is handled through UV photodissociation foul smell processing apparatus, the probability that the pathogen passes through the exhaust-gas transmission disease has been reduced. In addition, adopt ultrasonic cleaning device, realized the self-cleaning of MBR membrane, need not chemical backwash, reduced the input volume of medicament, reduced secondary pollution, simultaneously, reduced the maintenance frequency of membrane, convenient management. Therefore, the utility model gives consideration to the treatment of wastewater and waste gas, has the advantages of good sewage treatment effect, strong disinfection capability, strong load impact resistance and the like, realizes the ultrasonic self-cleaning of the MBR membrane, reduces the secondary pollution, reduces the maintenance frequency of the membrane and is convenient to manage.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. A medical wastewater treatment system characterized by: the device comprises a UV photolysis odor treatment device (29), an air blower (25) and a reaction tank unit which is formed by combining a pre-disinfection tank (1), an adjusting tank (4), an anaerobic tank (6), an anoxic tank (7), an aerobic tank (8), an MBR membrane tank (19), a deep disinfection tank (20) and a clean water tank (21), wherein the reaction tank unit runs in a sealing way and is communicated with the UV photolysis odor treatment device through a gas collecting pipe (30) at the top; aeration structures are arranged in the anoxic tank, the aerobic tank and the MBR membrane tank, and the aeration structures are communicated with an air blower through an airflow pipeline; an MBR membrane system (14) is arranged in the MBR membrane tank, the MBR membrane system is provided with an ultrasonic cleaning device, the water outlet end of the MBR membrane system is communicated with the deep disinfection tank through a water production pipe, and a water production pump (26) is arranged on the water production pipe.

2. The medical wastewater treatment system according to claim 1, wherein: the ultrasonic cleaning device comprises an ultrasonic generator (23) and at least one ultrasonic transducer (15) fixed on an MBR membrane system.

3. The medical wastewater treatment system according to claim 2, characterized in that: be provided with the liquid reflux unit is nitrified to the air stripping formula between good oxygen pond and the oxygen deficiency pond, the liquid reflux unit is nitrified to the air stripping formula includes nitrify liquid back flow (12) and air stripping pipe (27), air stripping pipe communicates with the air-blower through the air flow pipeline.

4. The medical wastewater treatment system according to claim 3, wherein: be provided with air-lift sludge reflux unit between MBR membrane cisterna and the anaerobism pond, air-lift sludge reflux unit includes sludge return pipe (17) and air-lift pipe two (16), air-lift pipe two is through air flow pipeline and air-blower intercommunication.

5. The medical wastewater treatment system according to any one of claims 1 to 4, wherein: still include sludge treatment equipment (28), the bottom in anaerobism pond, oxygen deficiency pond, good oxygen pond, MBR membrane cisterna all is equipped with row's mud branch pipe, arrange the mud branch pipe and be responsible for through row's mud and assemble back and sludge treatment equipment intercommunication, be provided with mud valve (24) on the row's mud branch pipe, be provided with mud pump (22) on the row's mud is responsible for.

6. The medical wastewater treatment system according to claim 5, wherein: and a regulating tank liquid level meter (3) and an MBR membrane tank liquid level meter (18) are respectively arranged in the regulating tank and the MBR membrane tank.

7. The medical wastewater treatment system according to claim 6, wherein: the sequential return circulation of water flow is realized among the pre-disinfection tank, the regulating tank, the anaerobic tank, the anoxic tank, the aerobic tank and the MBR membrane tank through any one of an overflowing hole, an overflowing pipe (11) or a submersible pump lifting device.

8. The medical wastewater treatment system according to claim 7, wherein: a grid (2) is arranged at the communication part of the pre-disinfection tank and the adjusting tank.

9. The medical wastewater treatment system according to claim 8, wherein: the aeration structures in the anoxic tank and the MBR membrane tank are respectively an aeration pipe I (9) and an aeration pipe II (13), and the aeration structure in the aerobic tank is an aeration disc (10).

10. The medical wastewater treatment system according to claim 9, wherein: and a pre-aeration system is arranged in the regulating tank.