CN117566958A

CN117566958A - Industrial sewage treatment system

Info

Publication number: CN117566958A
Application number: CN202311797007.6A
Authority: CN
Inventors: 胡志武; 罗丰; 吉强; 雷明坤; 唐伟华; 周娴; 周期望
Original assignee: Hunan Wujiu Environmental Protection Technology Development Co ltd
Current assignee: Hunan Wujiu Environmental Protection Technology Development Co ltd
Priority date: 2023-12-25
Filing date: 2023-12-25
Publication date: 2024-02-20

Abstract

The invention relates to an industrial sewage treatment system, comprising: an adjusting unit for storing the sewage to be treated; the sewage treatment unit is used for treating sewage in the regulating unit, and the regulating unit comprises a sewage lifting device which is used for conveying the sewage in the regulating unit into the sewage treatment unit; the aeration unit is used for aerating in the sewage treatment unit and comprises an aeration fan; the sewage lifting device and the aeration fans are provided with at least two groups, the at least two groups of aeration fans are arranged in parallel, the at least two groups of sewage lifting devices are alternately used at intervals, and the at least two groups of aeration fans are alternately used at intervals; the sewage lifting device and the aeration device can be guaranteed to normally operate, so that sewage in the adjusting unit can be continuously treated and consumed, the newly discharged sewage can continuously enter the adjusting unit, and a large amount of industrial sewage treatment requirements can be met.

Description

Industrial sewage treatment system

Technical Field

The invention relates to the technical field of sewage treatment, in particular to an industrial sewage treatment system.

Background

Industrial wastewater refers to wastewater containing various pollutants generated in an industrial process. The composition and properties of industrial sewage vary from one industrial process to another, but generally include various organic, inorganic, suspended, heavy metals, oils, acid-base substances, and the like. These contaminants come from industrial equipment cooling, cleaning, process waste water and raw material and chemical handling processes. Organic matters existing in industrial sewage are extremely unstable and are easy to be decomposed to generate malodor.

The industrial sewage discharge capacity is large, if the purification treatment is not carried out, the natural environment can be greatly damaged. Most of the existing industrial sewage treatment systems have unstable operation and cannot meet the treatment requirements of a large amount of industrial sewage.

Disclosure of Invention

In order to solve the technical problems, the application provides an industrial sewage treatment system.

The above object of the present invention is achieved by the following technical solutions: an industrial wastewater treatment system, comprising:

an adjusting unit for storing the sewage to be treated;

the sewage treatment unit is used for treating the sewage in the regulating unit, the regulating unit comprises a sewage lifting device, and the sewage lifting device is used for conveying the sewage in the regulating unit into the sewage treatment unit; and

an aeration unit for aerating in the sewage treatment unit, the aeration unit comprising an aeration fan;

the sewage lifting device and the aeration fans are provided with at least two groups, at least two groups of sewage lifting devices are arranged in parallel, at least two groups of aeration fans are arranged in parallel, at least two groups of sewage lifting devices are alternately used at intervals, and at least two groups of aeration fans are alternately used at intervals.

By adopting the technical scheme, in use, as industrial sewage is continuously generated, the equipment needs to be continuously operated for a long time, and in the past, in order to avoid shutdown after faults, manual duty is needed to ensure timely maintenance after the faults of the equipment, and the scheme can be used for timely switching after the faults of the system by designing key parts in the sewage treatment system for standby so as to ensure that the sewage can be continuously operated when the faults occur, so that enough maintenance time is provided for maintenance personnel, the normal operation of sewage treatment is ensured, the occurrence of sewage accumulation when the sewage cannot be treated is avoided, the situation that the industrial sewage cannot be normally discharged is caused, and the treatment requirement of a large amount of industrial sewage can be met; can carry the sewage in the regulating unit to the interior treatment of sewage treatment unit through sewage hoisting device, and can guarantee the microorganism high-efficient treatment sewage in the sewage treatment unit through the aeration unit, through setting up at least two sets of and setting up at least two sets of with aeration fan with sewage hoisting device, can guarantee sewage hoisting device and aeration device's normal operating, consequently can constantly handle and consume the sewage in the regulating unit, so can let in the new sewage of discharging constantly gets into the regulating unit, can satisfy a large amount of industrial sewage treatment needs.

Preferably, the alternate use time of at least two groups of sewage lifting devices and at least two groups of aeration fans is adjustable.

By adopting the technical scheme, the time interval for alternately using the sewage lifting device and the aeration fan can be adjusted according to specific use conditions and equipment conditions, and the working efficiency and the service life of the sewage lifting device and the aeration fan are improved.

Preferably, the sewage treatment unit comprises an anaerobic tank, an anoxic tank, an aerobic tank and a membrane tank which are sequentially connected in series;

the anaerobic tank and the anoxic tank are communicated at the lowest water level of the anaerobic tank and the anoxic tank, the anoxic tank and the aerobic tank are communicated at the highest water level of the anoxic tank and the aerobic tank, the aerobic tank and the membrane tank are communicated at the lowest water level of the aerobic tank and the membrane tank, and biological fillers are arranged in the anaerobic tank and the aerobic tank; the aeration unit is used for aerating the aerobic tank and the membrane tank.

By adopting the technical scheme, the communicating positions among the anaerobic tank, the anoxic tank, the aerobic tank and the membrane tank are designed in such a way, so that the retention time of sewage in the sewage treatment unit can be prolonged, the sewage can be effectively treated by microorganisms, and the sewage treatment effect is improved; biological fillers are arranged in the anaerobic tank and the aerobic tank, so that the sewage treatment efficiency and the sewage treatment effect of microorganisms can be improved.

Preferably, a sewage reflux system is connected between the aerobic tank and the anaerobic tank, and the sewage reflux system is used for pumping sewage in the aerobic tank into the anaerobic tank.

Through adopting above-mentioned technical scheme for in the sewage reentrant anaerobism pond that good oxygen pond was handled, guarantee that sewage treatment can reach the emission requirement after, can adjust the flow of sewage reflux system according to the actual emission needs, simultaneously, when the sewage in the good oxygen pond is poured into the anaerobism pond into, can dilute the sewage that the adjusting unit got into in the anaerobism pond, make the sewage concentration in the anaerobism pond reduce, improve the treatment effect in anaerobism pond.

Preferably, a sludge reflux system is communicated between the membrane tank and the anoxic tank, and the sludge reflux system is used for pumping the sludge in the membrane tank into the anoxic tank.

Through adopting above-mentioned technical scheme, because the membrane pond can separate the impurity in the sewage, consequently can lead to the mud in the membrane pond more and more, simultaneously along with the flow of sewage, the mud in anoxic tank and the good oxygen pond also can get into the membrane pond gradually in, consequently can let the mud backward flow to the anoxic tank in through the mud return system, guarantee the mud content and the mud activity in anoxic tank and the good oxygen pond.

Preferably, the sludge reflux system comprises a first outlet and a second outlet, wherein the first outlet is used for being communicated with the anoxic tank, and the second outlet is communicated with the sludge tank.

Through adopting above-mentioned technical scheme, along with the continuous treatment to sewage, the mud in the sewage treatment unit can be deposited more, consequently in discharging partial mud to the sludge impoundment through the second export, can guarantee the normal operating of sewage treatment unit, in reinjecting partial mud into the oxygen deficiency pond simultaneously, can supply the mud in the oxygen deficiency pond, can not carry out efficient treatment condition to sewage and appear when avoiding the activated sludge in oxygen deficiency pond and the good oxygen pond less.

Preferably, stirring devices are arranged in the anaerobic tank and the anoxic tank.

Through adopting above-mentioned technical scheme, can let sewage and microorganism fully contact through agitating unit, improve sewage treatment effect, can avoid the mud layering simultaneously, let fresh sludge and ripe mud misce bene, further improve sewage treatment's effect.

Preferably, an MBR membrane filtration system is arranged in the membrane tank, the MBR membrane filtration system comprises a purified water outlet, and the purified water outlet is connected with a water outlet sterilization system and a backwashing system.

By adopting the technical scheme, the MBR membrane is of a multi-layer membrane structure, and has the functions of removing pollutants in water and improving water quality through the selective action of the membrane in the sewage treatment process; bacteria, viruses and other microorganisms in the filtered water can be killed through the water outlet sterilization system, so that the sewage is sterilized, and the filtered sewage can be reused; and dirt and biological membranes on the surface of the MBR membrane can be cleaned through a backwashing system, so that the filtering effect and stability of the MBR membrane are ensured.

Preferably, the outlet water sterilization system includes a suction member for drawing out the filtered purified water from the purified water outlet, and an ultraviolet sterilization part for sterilizing the drawn-out purified water by ultraviolet rays.

Through adopting above-mentioned technical scheme, can provide the negative pressure for the MBR membrane through the suction piece, let sewage filtration efficiency high, can destroy the nucleic acid of microorganism such as bacterium, virus through ultraviolet sterilization portion to reach the effect to the sewage disinfection after the filtration.

Preferably, the suction pieces are provided with at least two groups, the at least two groups of suction pieces are arranged in parallel, and the at least two groups of suction pieces are alternately used at intervals.

By adopting the technical scheme, in sewage filtration, the suction pieces are required to be used uninterruptedly so as to ensure that sewage can continuously enter the sewage treatment unit, and at least two groups of suction pieces are arranged, so that the suction pieces can be switched seamlessly after the suction pieces are out of order, sewage treatment can be stopped for a long time, and sewage treatment requirements are ensured; through using at least two sets of suction pieces alternately, can shut down after the suction piece uses a period of time, let the suction piece obtain cooling and maintenance, improve the life of suction piece.

In summary, the present invention includes at least one of the following beneficial technical effects:

1. by arranging at least two groups of sewage lifting devices and aeration fans, the normal operation of the sewage lifting devices and the aeration devices can be ensured, so that sewage in the regulating unit can be continuously treated and consumed, newly discharged sewage can continuously enter the regulating unit, and a large amount of industrial sewage treatment requirements can be met;

2. the water outlet sterilization system can kill bacteria, viruses and other microorganisms in the filtered water, so as to sterilize the sewage, and reuse the filtered sewage; and dirt and biological membranes on the surface of the MBR membrane can be cleaned through a backwashing system, so that the filtering effect and stability of the MBR membrane are ensured.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present application.

Fig. 2 is a schematic structural view of the regulating unit.

Fig. 3 is a schematic diagram of the structure of the sewage treatment unit.

Fig. 4 is a schematic view of a specific installation structure of the first aeration disc.

Fig. 5 is an enlarged schematic view of the portion a in fig. 4.

Fig. 6 is a schematic diagram of the structure of the effluent sterilization system and the backwash system.

In the figure, 1, an adjusting unit; 11a, a sewage lifting device; 11b, a grid; 2. a sewage treatment unit; 21. an anaerobic tank; 22. an anoxic tank; 23. an aerobic tank; 24. a membrane pool; 3. an aeration unit; 31. an aeration fan; 32. an aeration disc; 32a, a first aeration disc; 32b, a second aeration disc; 33. an aeration spray head; 4. a biological filler; 5. a sewage reflux system; 6. a sludge reflux system; 61. a first outlet; 62. a second outlet; 7. a stirring device; 8. an MBR membrane filtration system; 81. a purified water outlet; 9. a water outlet sterilization system; 91. a suction member; 92. an ultraviolet sterilization unit; 10. a back flushing system; 101. a dispensing device; 102. a backwash pump; 11. a sludge pool; 12. a spring; 13. a telescopic tube; 131. a first sub-tube; 132. a second sub-tube; 14. a recycling pool; 15. sinking groove.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments.

In the description of embodiments of the present application, words such as "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described herein as "such as" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "or" for example "is intended to present related concepts in a concrete fashion.

In the description of the embodiments of the present application, the term "plurality" means two or more. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating an indicated technical feature. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

Referring to fig. 1 and 2, an industrial sewage treatment system disclosed by the invention comprises a regulating unit 1, a sewage treatment unit 2 and an aeration unit 3, wherein the regulating unit 1 is used for being in butt joint with an industrial sewage discharge pipeline, industrial sewage can be directly discharged into the regulating unit 1, in the embodiment, the regulating unit 1 comprises a grid 11b, when the sewage enters the regulating unit 1, suspended matters and the like in the sewage are filtered out by the grid 11b, so that the sewage can be conveniently treated subsequently; the sewage lifting device 11a is arranged in the adjusting unit 1, the sewage lifting device 11a is used for conveying sewage in the adjusting unit 1 into the sewage treatment unit 2, the sewage lifting devices 11a are at least two groups, at least two groups of sewage lifting devices 11a are connected in parallel in the system, any group of sewage lifting devices 11a can work independently, in the embodiment, the sewage lifting devices 11a are two groups, the sewage lifting devices 11a comprise lifting pumps, the lifting pumps pump the sewage in the adjusting unit 1 into the sewage treatment unit 2 through pipelines, in the embodiment, the two lifting pumps are switched once every 8 hours, the first lifting pump stops working after working for 8 hours, the second lifting pump starts working in a standing mode for 8 hours, and in the specific use, the interval time can be adjusted according to the needs.

Referring to fig. 3 and 4, the aeration unit 3 includes an aeration fan 31, an aeration disc 32 and an aeration nozzle 33, wherein the aeration fan 31 is connected with the aeration disc 32 through a pipeline, a plurality of aeration nozzles 33 are communicated with the aeration disc 32, the injection direction of the aeration nozzle 33 is towards the side away from the bottom of the tank body, and when aeration is performed, gas injected by the aeration nozzle 33 moves towards the open end of the tank body under the action of self buoyancy, and air generated by the aeration fan 31 enters the aeration disc 32 through the pipeline and then is sprayed out of the aeration nozzle 33. Because aeration unit 3 is crucial in sewage treatment, consequently, need guarantee in operation that aeration fan 31 can normally work as required, consequently, be provided with two at least groups with aeration fan 31, two at least groups of aeration fan 31 are parallelly connected in the system, any one set of aeration fan 31 all can work alone, in this embodiment, aeration fan 31 is two sets of, in the use, two sets of aeration fan 31 interval switch in turn use, aeration fan 31 in turn use time interval can be adjusted according to actual need, one of them aeration fan 31 stops after the work, another aeration fan 31 works thereupon, so reciprocating cycle can, after one of them aeration fan 31 breaks down, another aeration fan 31 can switch into operating condition at any time, guarantee that aeration unit 3 can stable work for a long time.

Referring to fig. 3 and 4, the sewage treatment unit 2 includes an anaerobic tank 21, an anoxic tank 22, an aerobic tank 23, and a membrane tank 24, which are sequentially connected in series; the sewage lifting device 11a pumps sewage into the anaerobic tank 21 from the regulating unit 1, the sewage enters the anoxic tank 22 after being treated in the anaerobic tank 21, then enters the aerobic tank 23 from the anoxic tank 22, finally enters the membrane tank 24 from the aerobic tank 23, in order to improve the retention time of the sewage in the sewage treatment unit 2, the communicating position of the anaerobic tank 21 and the anoxic tank 22 is positioned at the lowest water level of the anaerobic tank 21 and the anoxic tank 22, the communicating position of the anoxic tank 22 and the aerobic tank 23 is positioned at the highest water level of the anoxic tank 22 and the aerobic tank 23, and the communicating position of the aerobic tank 23 and the membrane tank 24 is positioned at the lowest water level of the aerobic tank 23 and the membrane tank 24. Sewage enters from the upper end of the anaerobic tank 21, enters the anoxic tank 22 from the bottom of the anaerobic tank 21, enters the aerobic tank 23 from the top position of the anoxic tank 22, and finally enters the membrane tank 24 from the bottom of the aerobic tank 23.

Referring to fig. 3 and 4, the aeration disc 32 includes a first aeration disc 32a and a second aeration disc 32b, the first aeration disc 32a is located in the aerobic tank 23, the second aeration disc 32b is located in the membrane tank 24, and biological fillers 4 are provided in both the anaerobic tank 21 and the aerobic tank 23; in this embodiment, the bio-filler 4 is a combined bio-filler 4; the stirring device 7 is arranged in the anaerobic tank 21 and the anoxic tank 22, in this embodiment, the stirring device 7 is a submersible stirrer, because the filler in the aerobic tank 23 is the combined biological filler 4, more sludge is deposited on the combined biological filler 4, and when the aeration nozzle 33 is aerated, the aeration direction is towards the upper end water surface side of the aerobic tank 23, the gas sprayed by the aeration nozzle 33 directly contacts with the combined biological filler 4, and the combined biological filler 4 is disturbed, so that microorganisms on the combined biological filler 4 are fully contacted with air.

Referring to fig. 4 and 5, the first aeration disc 32a is floatingly installed at the bottom of the aerobic tank 23, the aeration spray nozzles 33 are located on the first aeration disc 32a, in this embodiment, a plurality of aeration spray nozzles 33 are provided on the first aeration disc 32a, the direction of the injected air of the aeration spray nozzles 33 is set toward the bottom side of the aerobic tank 23, the cross section of the aeration spray nozzles 33 facing away from the bottom side of the aerobic tank 23 is larger than the cross section of the bottom side of the aerobic tank 23, whereby the aeration spray nozzles 33 form an umbrella-shaped structure, the air outlet holes of the aeration spray nozzles 33 are located on the side surface of the aeration spray nozzles 33, and a sink 15 is provided on the aeration spray nozzles 33, the air outlet holes are located in the sink 15, and the umbrella-shaped aeration spray nozzles 33 can protect the air outlet holes, thereby effectively avoiding the occurrence of the condition that the air outlet holes are blocked by sludge. The first aeration disc 32a is slidably arranged at the bottom of the aerobic tank 23 along the depth direction of the vertical aerobic tank 23, a spring 12 is arranged between the first aeration disc 32a and the bottom of the aerobic tank 23, one end of the spring 12 is connected to the bottom wall of the aerobic tank 23, the other end of the spring 12 is connected to the bottom of the first aeration disc 32a, the first aeration disc 32a is communicated with a telescopic tube 13, the telescopic tube 13 is communicated with an aeration fan 31, the spring 12 is used for bearing the weight of the first aeration disc 32a and an aeration spray head 33, when the aeration spray head 33 is used, the spring 12 is always in a compressed state, when the aeration spray head 33 is sprayed outwards, the pressure born by the spring 12 is reduced under the action of air reaction force, and at the moment, the first aeration disc 32a moves upwards until the first aeration disc 32a is in a balanced state.

In this embodiment, the telescopic tube 13 includes a first sub-tube 131 fixedly connected with the first aeration disc 32a and a second sub-tube 132 sleeved on the first sub-tube 131, the first sub-tube 131 and the second sub-tube 132 are slidably connected, and the second sub-tube 132 is communicated with the aeration fan 31.

During aeration, the first aeration disc 32a moves upwards for a certain distance, when aeration is not needed, the gravity borne by the spring 12 is increased, the first aeration disc 32a descends for a certain distance, the first aeration disc 32a can be ensured to be positioned at the bottom side of the aerobic tank 23, so that the concentration of liquid in the aerobic tank 23 is controlled during aeration, when the concentration of active sludge floating in the aerobic tank 23 is lower, the air injection speed of the aeration spray nozzle 33 can be increased, and therefore, more active sludge at the bottom of the aerobic tank 23 is disturbed by air, and more active sludge floats; when the concentration of the activated sludge in the aerobic tank 23 is higher, the air injection speed of the aeration nozzle 33 can be reduced, so that the disturbance of air to the activated sludge at the bottom of the aerobic tank 23 is reduced, and the concentration of the activated sludge in the aerobic tank 23 can be reduced along with the sedimentation of the activated sludge in the aerobic tank 23; meanwhile, the spraying direction of the aeration spray head 33 faces the bottom of the aerobic tank 23, the sprayed air can be prevented from directly opposite to the biological filler 4, further, the situation that activated sludge on the biological filler 4 is impacted and falls down is avoided, more sludge is enabled to be settled on the biological filler 4, the situation that sewage treatment effect is poor when the activated sludge on the biological filler 4 is less is avoided, meanwhile, the aeration spray head 33 can slide up and down reciprocally in use, the situation that the aeration spray head 33 is blocked by sludge is not easily caused, meanwhile, air blows towards the bottom side of the aerobic tank 23 during aeration, so that enough oxygen can be provided in the activated sludge at the bottom of the aerobic tank 23, the microorganisms are guaranteed to have stronger activity, better sewage treatment effect can be achieved through the design, the air just entering the aerobic tank 23 is high in oxygen content, the air with higher oxygen content is enabled to be directly flushed into the activated sludge at the bottom of the aerobic tank 23, the oxygen can be rapidly consumed, the oxygen can be enabled to be located in a region away from the bottom side of the aerobic tank 23, the oxygen can be fully consumed from the bottom of the aerobic tank 23, and the oxygen can be fully consumed from the bottom of the aerobic tank 23 on the other hand.

Referring to fig. 3, in order to improve the sewage treatment effect, a sewage reflux system 5 is communicated between the aerobic tank 23 and the anaerobic tank 21, so that sewage in the aerobic tank 23 is pumped into the anaerobic tank 21 for further treatment, and the treatment is circulated until the sewage reaches the discharge standard; the sewage reflux system 5 comprises a sewage reflux pump and a pipeline which are positioned in the aerobic tank 23, and sewage is pumped into the anaerobic tank 21 through the pipeline.

Referring to fig. 4 and 5, an MBR membrane filtration system 8 is disposed in the membrane tank 24, the MBR membrane filtration system 8 includes a water purification outlet 81, water filtered by the MBR membrane filtration system 8 will exit from the water purification outlet 81, a water outlet sterilization system 9 and a back flushing system 10 are connected to the water purification outlet 81, the water outlet sterilization system 9 is used for sterilizing the filtered water, and the back flushing system 10 is used for flushing the MBR membrane filtration system 8 regularly, so that the MBR membrane filtration system 8 maintains a better filtration effect and filtration stability. Since clean water is filtered out in the membrane tank 24, a large amount of sludge is accumulated in the membrane tank 24, and in order to avoid the influence of the sludge on the normal operation of the membrane tank 24, a sludge reflux system 6 is arranged in the membrane tank 24, the sludge reflux system 6 comprises a first outlet 61 and a second outlet 62, the first outlet 61 is communicated with the anoxic tank 22, the second outlet 62 is communicated with the sludge tank 11 for discharging part of the sludge, and meanwhile, part of the sludge is continuously circulated in the sewage treatment unit 2, so that the activity of the sludge is maintained. The sludge recirculation system 6 includes a sludge recirculation pump and piping through which sludge is output from the membrane tank 24 into the anoxic tank 22 and the sludge tank 11. Since the sludge in the membrane tank 24 is continuously drawn out, sludge accumulation in the membrane tank 24 is less likely to occur, and thus the second aeration disc 32b is less likely to be submerged or even blocked by the sludge.

Referring to fig. 5, wherein the effluent sterilization system 9 includes a suction member 91 and an ultraviolet sterilization portion 92, the suction member 91 is used for drawing filtered clean water from the clean water outlet 81, the suction member 91 is provided with at least two groups, and the at least two groups of suction members 91 are arranged in parallel, and any one group of suction members 91 can be operated independently. In this embodiment, the suction pieces 91 are suction pumps, and the suction pieces 91 are two groups, and when one suction piece 91 fails, the suction piece 91 can be switched to the other suction piece 91 in time. The water pumped by the pumping piece 91 is sterilized by the ultraviolet sterilization part 92, so that the subsequent recycling is convenient.

In this embodiment, the back flush system 10 includes a dispensing device 101 and a back flush pump 102, the sterilized water enters the reuse water tank 14, the back flush pump 102 pumps the filtered water from the reuse water tank 14 into the clean water outlet 81, and at the same time, the rinse solution in the dispensing device 101 is sent into the clean water outlet 81 along with the water, so as to back flush the MBR membrane filtration system 8.

Industrial sewage enters the regulating unit 1 through a pipeline and is filtered by the grid 11b, then the sewage is sent to the anaerobic tank 21, the anoxic tank 22, the aerobic tank 23 and the membrane tank 24 through the sewage lifting device 11a, in the membrane tank 24, after passing through the MBR membrane filtration system 8, the sewage is sent to the ultraviolet sterilization part 92 by a suction pump for sterilization, and finally the sewage enters the reuse water tank 14 for storage for reuse. In sewage treatment, sewage in the aerobic tank 23 is continuously sent to the anaerobic tank 21 for further treatment by the sewage reflux system 5, and part of sludge is sent to the anoxic tank 22 by the sludge reflux system 6, and the other part of sludge is sent to the sludge tank 11.

The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.

Claims

1. An industrial wastewater treatment system, comprising:

an adjusting unit (1) for storing the sewage to be treated;

the sewage treatment unit (2) is used for treating the sewage in the regulating unit (1), the regulating unit (1) comprises a sewage lifting device (11 a), and the sewage lifting device (11 a) is used for conveying the sewage in the regulating unit (1) into the sewage treatment unit (2); and

an aeration unit (3) for aerating in the sewage treatment unit (2), the aeration unit (3) comprising an aeration fan (31);

wherein, sewage hoisting device (11 a) and aeration fan (31) all are provided with two at least groups, and two at least groups sewage hoisting device (11 a) parallelly connected setting, two at least groups aeration fan (31) parallelly connected setting, two at least groups sewage hoisting device (11 a) interval alternately use in turn, two at least groups aeration fan (31) interval alternately use in turn.

2. An industrial sewage treatment system according to claim 1, wherein the alternate use times of at least two sets of said sewage lifting means (11 a) and at least two sets of aeration fans (31) are adjustable.

3. An industrial sewage treatment system according to claim 1, wherein the sewage treatment unit (2) comprises an anaerobic tank (21), an anoxic tank (22), an aerobic tank (23) and a membrane tank (24) which are connected in series in this order;

the anaerobic tank (21) and the anoxic tank (22) are communicated at the lowest water level of the anaerobic tank (21) and the anoxic tank (22), the anoxic tank (22) and the aerobic tank (23) are communicated at the highest water level of the anoxic tank (22) and the aerobic tank (23), the aerobic tank (23) and the membrane tank (24) are communicated at the lowest water level of the aerobic tank (23) and the membrane tank (24), and biological fillers (4) are arranged in the anaerobic tank (21) and the aerobic tank (23); the aeration unit (3) is used for aerating the aerobic tank (23) and the membrane tank (24).

4. An industrial sewage treatment system according to claim 3, wherein a sewage reflux system (5) is connected between the aerobic tank (23) and the anaerobic tank (21), and the sewage reflux system (5) is used for pumping sewage in the aerobic tank (23) into the anaerobic tank (21).

5. An industrial sewage treatment system according to claim 3, wherein a sludge recirculation system (6) is connected between the membrane tank (24) and the anoxic tank (22), and the sludge recirculation system (6) is used for pumping the sludge in the membrane tank (24) into the anoxic tank (22).

6. An industrial sewage treatment system according to claim 5, wherein the sludge recirculation system (6) comprises a first outlet (61) and a second outlet (62), the first outlet (61) being adapted to communicate with the anoxic tank (22), the second outlet (62) being in communication with the sludge tank (11).

7. An industrial sewage treatment system according to claim 3, wherein the anaerobic tank (21) and the anoxic tank (22) are provided with stirring means (7).

8. An industrial sewage treatment system according to claim 3, characterized in that an MBR membrane filtration system (8) is arranged in the membrane tank (24), the MBR membrane filtration system (8) comprises a purified water outlet (81), and the purified water outlet (81) is connected with a water outlet sterilization system (9) and a back flushing system (10).

9. An industrial sewage treatment system according to claim 8, wherein the effluent sterilization system (9) comprises a suction member (91) and an ultraviolet sterilization portion (92), the suction member (91) being configured to draw filtered clean water from the clean water outlet (81), the ultraviolet sterilization portion (92) being configured to sterilize the drawn clean water by ultraviolet rays.

10. An industrial sewage treatment system according to claim 9, wherein the suction members (91) are provided in at least two groups, the at least two groups of suction members (91) being arranged in parallel, the at least two groups of suction members (91) being alternately used at intervals.