CN218620476U

CN218620476U - Sewage purification treatment system

Info

Publication number: CN218620476U
Application number: CN202222698608.9U
Authority: CN
Inventors: 曹相画; 文炎
Original assignee: Wuhan Z&y Environment Technology Co ltd
Current assignee: Wuhan Z&y Environment Technology Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-03-14
Anticipated expiration: 2032-10-13

Abstract

The utility model relates to a sewage purification treatment system, wherein an oil separation sedimentation tank is provided with a sewage inlet, and the middle part of the height position of the tank wall of the oil separation sedimentation tank is communicated with an adjusting tank; the pressure aeration system comprises an electric lift pump, a positive output pipeline and a sprayer, wherein the electric lift pump is arranged at the bottom of the regulating tank, and the output end of the electric lift pump is communicated with the input port of the sprayer through the positive output pipeline; the biological treatment system comprises a filter tank, biological treatment filler and a perforated water collecting pipe, wherein the biological treatment filler is filled in the filter tank transversely, the sprayer is arranged at the top of the filter tank, the spraying direction of the sprayer faces the top of the high-efficiency biological filler, the perforated water collecting pipe is arranged at the side part and/or the bottom of the filter tank, and the outlet end of the perforated water collecting pipe is arranged outside the filter tank. The system can realize impact resistance, low energy consumption, easy maintenance and high efficiency in sewage treatment.

Description

Sewage purification treatment system

Technical Field

The utility model relates to a sewage treatment device field, in particular to a sewage purification treatment system suitable for rural single households and a small centralized sewage treatment mode.

Background

At present, the self-care of rural domestic sewage in China has the following problems: firstly, rural domestic sewage in China has wide and dispersed pollution surface, sewage pipe networks have high construction cost and large maintenance difficulty, the collection rate is low, no water enters a sewage station for a long time, and a sewage treatment system is easy to crash. Secondly, a large amount of rural population in China goes out to work, the number of people living in China is small at ordinary times, most people return to the countryside after the festival of the year, the sewage quantity is increased suddenly, the sewage treatment load is exceeded, and sewage overflow happens. Thirdly, rural sewage treatment processes are various, most of the rural sewage treatment processes are AAO and deformation processes thereof, even some places are directly used with MBR processes, the processes need equipment such as lifting, aeration, backflow, sludge discharge and MBR membrane replacement, the whole system is high in energy consumption, multiple in fault points, high in later-stage operation and maintenance technical requirements and high in difficulty, and special persons need to maintain the system. After a long time, the electricity charge cannot be born, and the sewage treatment project in rural areas, which is sunned with the sun, is better. The problems of high construction cost, high operation and maintenance difficulty and the like of rural domestic sewage treatment facilities are objectively existed, and a long-acting mechanism needs to be sound.

Therefore, the key tasks of rural sewage treatment are to reasonably determine the scale and layout of rural sewage treatment facilities according to local conditions and strengthen the construction and operation management of the sewage treatment facilities. The selection of rural sewage treatment equipment preferentially considers products with impact resistance, low energy consumption, easy maintenance and high efficiency.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a sewage purification treatment system, this system can shock resistance, low energy consumption, easy maintenance, efficient carry out sewage treatment.

In order to achieve the above object, the utility model adopts the following technical scheme:

a sewage purification treatment system comprises an oil separation sedimentation tank, a regulating tank, a pressure aeration system and a biological treatment system, wherein the oil separation sedimentation tank is provided with a sewage inlet, and the middle part of the height position of the tank wall of the oil separation sedimentation tank is communicated with the regulating tank;

the pressure aeration system comprises an electric lift pump, a positive output pipeline and a sprayer, wherein the electric lift pump is arranged at the bottom of the regulating tank, and the output end of the electric lift pump is communicated with the input port of the sprayer through the positive output pipeline;

the biological treatment system comprises a filter tank, biological treatment filler and a perforated water collecting pipe, wherein the biological treatment filler is filled in the filter tank transversely, the sprayer is arranged at the top of the filter tank, the spraying direction of the sprayer faces the top of the high-efficiency biological filler, the perforated water collecting pipe is arranged at the side part and/or the bottom of the filter tank, and the outlet end of the perforated water collecting pipe is arranged outside the filter tank.

Preferably, the sewage purification treatment system further comprises a first three-way pipe and a second three-way pipe, wherein a first port of the first three-way pipe is communicated with the output end of the electric lift pump, a second end of the first three-way pipe is communicated with the inlet and outlet end of the positive output pipeline, a third end of the first three-way pipe is communicated with a first end of the second three-way pipe through a backwashing pipeline, and a second end of the second three-way pipe is communicated with the output end of the perforated water collecting pipe;

the positive output pipeline is provided with a first valve, the back flush pipeline is provided with a second valve, and the third end of the second three-way pipe fitting is provided with a fourth valve;

and a back flush return pipe is arranged on the side wall of the filtering tank close to the top, and the output end of the back flush return pipe is communicated with the inside of the oil separation sedimentation tank.

Preferably, the bottom of the filter tank is connected with a vent pipe, and the vent pipe is provided with a third valve.

Preferably, the output end of the perforated water collecting pipe is connected with a secondary sedimentation tank, a vertical sedimentation tank for depositing sediment is arranged in the secondary sedimentation tank, the output end of the perforated water collecting pipe is connected with the input end of the vertical sedimentation tank, and the output end of the vertical sedimentation tank is a water outlet pipe for discharging purified water.

Preferably, a return pipe is arranged at the bottom of the secondary sedimentation tank, the output end of the return pipe is communicated with the regulating tank through the return pipe, and an electric valve is arranged at the output end of the return pipe.

Preferably, the sewage purification treatment system further comprises a PLC (programmable logic controller), a first liquid level controller and a second liquid level controller, wherein an overrun pipe is arranged at a position, close to the top, of the side wall of the adjusting tank, the first liquid level controller and the second liquid level controller are respectively installed at the highest point and the lowest point of the normal treatment water level of the adjusting tank, and a water level height signal is formed when the liquid level height in the adjusting tank reaches the first liquid level controller and the second liquid level controller;

the PLC controller is respectively in signal connection with the first liquid level controller, the second liquid level controller, the electric valve and the electric lift pump, and the PLC controller is used for receiving water level height signals sent by the first liquid level controller and the second liquid level controller and switching an opening and closing instruction to the electric valve and the electric lift pump according to the water level height signals.

Preferably, the biological treatment filler comprises an upper gravel filler, a high-efficiency dephosphorization filler, a high-efficiency biological filler and a lower gravel filler which are sequentially arranged from top to bottom, and the perforated water collecting pipe is pre-embedded in the lower gravel filler.

Preferably, a grating well is arranged at a sewage conveying inlet of the oil separation sedimentation tank;

fine grids are arranged on the oil separation sedimentation tank and the adjusting tank in a communicating manner;

and a manhole is formed in the top of the oil separation sedimentation tank.

Preferably, the bottom of the oil separation sedimentation tank is provided with a first cone bucket structure, the oil separation sedimentation tank is further provided with an outer sediment discharge pipe, and the input end of the outer sediment discharge pipe is arranged at the gathering position of the lower part of the first cone bucket structure of the oil separation sedimentation tank.

Preferably, a second cone structure is arranged at the bottom in the secondary sedimentation tank, and the input end of the return pipe is arranged at the gathering position of the lower part of the second cone structure.

Use the utility model has the advantages that:

this system accomplishes the effect of oil removal through oil removal sedimentation tank, accomplishes the slow urgent buffering effect of flow and rivers through the equalizing basin, and pressure aeration system carries out sewage aeration oxygen boosting treatment, accomplishes the filtration of sewage through biological treatment system at last, accomplishes the whole water treatment of sewage. Based on the technical effects, the system also has the following advantages:

the impact resistance is strong: because this system sets up the equalizing basin to including two sedimentation tanks and back flow etc. according to the equalizing basin design sediment return-flow system, this sediment return-flow system can be adjusted according to the volume of water that comes, the surplus sewage in the equalizing basin, adjusts the inside surplus sewage of equalizing basin by oneself, can guarantee biological survival system normal operating, can solve this system and bring the impact for the system at the too big or the little water yield of water yield.

The energy consumption is extremely low: this system only needs a water pump can realize whole steps such as promotion, aeration, backward flow, back flush, compares conventional technology, reduces a large amount of electrical equipment such as fan, nitration liquid backwash pump, mud backwash pump, and the investment that can significantly reduce of this system realizes extremely low energy consumption operation.

The maintenance is easy: the system uses the PLC controller, the liquid level controller, the electric valve and the electric lift pump, can realize automatic control of the system, does not need personnel to watch for a long time, and does not need manual intervention in daily operation. The system has simple structure, few fault points and easy maintenance, does not need to lay long-distance pipelines, saves structures such as a septic tank, a sewage trunk network, an inspection well and the like compared with the conventional sewage treatment process, saves a large amount of investment, and also saves a large amount of maintenance and overhaul expenses.

The treatment efficiency is high: the sewage treatment process adopts an intermittently operated contact oxidation process, has the characteristics of high treatment efficiency and small sludge production amount, can realize a series of processes such as sewage filtration, phosphorus removal, biomass decomposition and the like through a plurality of layers of phosphorus removal fillers, high-efficiency biological fillers and gravel fillers in the filter tank, and can realize comprehensive sewage treatment by a single system.

Drawings

FIG. 1 is a schematic view of the sewage purification system of the present invention.

The reference numerals include:

1-grating well, 2-oil separation sedimentation tank, 3-sediment discharge pipe, 4-fine grating, 51-first cone structure, 52-second cone structure, 6-regulating tank, 71-first liquid level controller, 72-second liquid level controller, 8-electric lift pump, 9-positive output pipeline, 10-sprayer, 11-high efficiency dephosphorization filler, 12-high efficiency biological filler, 131-upper gravel filler, 132-lower gravel filler, 14-perforated water collecting pipe, 15-second sedimentation tank, 16-return pipe, 17-electric valve, 181-first valve, 182-second valve, 183-third valve, 184-fourth valve, 19-backwashing pipeline, 20-backwashing return pipe, 21-filtering tank, 22-PLC controller, 23-overtaking pipe, 24-foundation, 25-water outlet pipe, 26-vertical flow sedimentation tank, 27-tee pipe, 281-first tee pipe, 282-second tee pipe.

Detailed Description

In order to make the purpose, technical solution and advantages of the present technical solution clearer, the present technical solution is further described in detail below with reference to specific embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present teachings.

Example 1:

as shown in fig. 1, the present embodiment provides a sewage purification treatment system suitable for rural single-family and small-concentration sewage treatment mode, comprising: the device comprises an oil separation sedimentation tank 2, a regulating tank 6, a pressure aeration system and a biological treatment system, wherein the oil separation sedimentation tank 2 is provided with a sewage inlet, and the middle part of the height position of the tank wall of the oil separation sedimentation tank 2 is communicated with the regulating tank 6; the pressure aeration system comprises an electric lift pump 8, a positive output pipeline 9 and a sprayer 10, wherein the electric lift pump 8 is arranged at the bottom of the regulating tank 6, and the output end of the electric lift pump 8 is communicated with the input port of the sprayer 10 through the positive output pipeline 9; the biological treatment system comprises a filter tank 21, biological treatment filler and a perforated water collecting pipe 14, wherein the biological treatment filler is filled in the filter tank 21 in a transverse mode, the sprayer 10 is arranged at the top of the filter tank 21, the spraying direction of the sprayer 10 faces the top of the high-efficiency biological filler 12, the perforated water collecting pipe 14 is arranged at the side part and/or the bottom part in the filter tank 21, the outlet end of the perforated water collecting pipe 14 is arranged outside the filter tank 21, and the main body of the system is arranged on a foundation 24.

The system can complete sewage treatment in a general meaning, firstly, sewage enters the oil separation sedimentation tank 2, the sewage enters the regulating tank 6 after oil separation through the oil separation sedimentation tank 2, the sewage in the regulating tank 6 is lifted through the electric lift pump 8 and is conveyed to the sprayer 10 through the positive output pipeline 9, the sewage is conveyed to the filter tank 21 through the spraying aeration mode of the sprayer 10, the sewage spontaneously flows through the biological treatment filler due to gravity, the treated sewage is collected through the perforated water collecting pipe 14 after being filtered by the biological treatment filler in the filter tank 21, and finally the sewage is discharged out of the filter tank 21 at the output end of the perforated water collecting pipe 14, so that the sewage treatment process is completed.

Example 2:

the embodiment discloses the composition of the biological treatment filler based on the sewage purification treatment system described in embodiment 1, and specifically includes: the upper gravel filler 131, the high-efficiency dephosphorization filler 11, the high-efficiency biological filler 12 and the lower gravel filler 132 are arranged from top to bottom in sequence, and the perforated water collecting pipe 14 is pre-embedded in the lower gravel filler 132.

The use process and the use principle of the biological treatment filler are as follows: during the use process, under the action of the sprayer 10, the vaporous sewage is fully combined with oxygen in the air, the sewage combined with the oxygen firstly falls into the upper gravel packing 131 for uniform water distribution, falls into the phosphorus absorption packing layer for physical adsorption of phosphorus in the sewage, and then falls into the high-efficiency biological packing 12, a large number of microorganisms are attached to the high-efficiency biological packing 12 with large specific surface area, and anaerobic bacteria, anoxic bacteria and aerobic bacteria on the outermost layer which grow from inside to outside propagate in a large amount to remove a large number of organic matters in the sewage; simultaneously carrying out nitration and denitrification reactions to convert pollutants such as ammonia nitrogen and the like in the sewage into nitrogen; the water purified by the high-efficiency biological filler 12 passes through the perforated collecting pipe at the lower gravel filler 132 and is discharged out of the filter tank 21 through the perforated collecting pipe, the phosphorus removal effect of the 11 layers of the high-efficiency phosphorus removal filler reaches more than 95 percent, and the new filler can be conveniently replaced according to the total phosphorus index of the effluent. The high-efficiency biological filler 12 is a filler with a large specific surface area, the sewage undergoes nitration reaction when passing through, the biological filler can be attached with a large amount of aerobic bacteria to grow, and the oxygen content of the inner layer is reduced along with the increase of the thickness, so that an anoxic environment and an anaerobic environment are formed naturally. Under the combined action of anaerobic bacteria, anoxic bacteria and aerobic bacteria on the outermost layer, a large amount of organic matters in the sewage are removed, and simultaneously, ammonia nitrogen in the sewage is converted into nitrate nitrogen and nitrite nitrogen. In the system, when the electric lift pump 8 stops running, denitrification reaction is carried out in the filter tank 21 to convert nitrate nitrogen and nitrite nitrogen into nitrogen, so that the aim of removing ammonia nitrogen and total nitrogen is fulfilled; the whole process has less sludge production and high sewage treatment efficiency.

Example 3:

this embodiment is based on the sewage purification processing system of embodiment 1 basis has increased back flush unit, and back flush unit includes: a first tee pipe 281 and a second tee pipe 282, wherein a first port of the first tee pipe 281 is communicated with an output end of the electric lift pump 8, a second end of the first tee pipe 281 is communicated with an input end and an output end of the positive output pipeline 9, a third end of the first tee pipe 281 is communicated with a first end of the second tee pipe 282 through a back flushing pipeline 19, and a second end of the second tee pipe 282 is communicated with an output end of the perforated water collecting pipe 14; a first valve 181 is arranged on the positive output pipeline 9, a second valve 182 is arranged on the back flush pipeline 19, and a fourth valve 184 is arranged at the third end of the second three-way pipe 282; a back washing return pipe 20 is arranged on the side wall of the filtering tank 21 close to the top, the output end of the back washing return pipe 20 is communicated with the inside of the oil separation sedimentation tank 2, the bottom of the filtering tank 21 is connected with an emptying pipe, a third valve 183 is arranged on the emptying pipe, and the third valve 183 is an emptying valve.

When the backwashing device is used, the second valve 182 is firstly opened, then the first valve 181, the third valve 183 and the fourth valve 184 are closed, at the moment, the electric lift pump 8 in the adjusting tank 6 is opened, the water output by the electric lift pump 8 passes through the backwashing pipeline 19 and the perforated water collecting pipe 14 and is input into the filtering tank 21 from the bottom of the filtering tank 21, and backwashing water automatically flows into the oil separation sedimentation tank 2 through the backwashing return pipe 20.

Example 4:

in this embodiment, a part of components for improving the impact resistance of the system is added on the basis of the sewage purification treatment system described in embodiment 3, and includes an output end of the perforated water collecting pipe 14 connected to the secondary sedimentation tank 15, a vertical sedimentation tank 26 for depositing sediment is provided inside the secondary sedimentation tank 15, an output end of the perforated water collecting pipe 14 is connected to an input end of the vertical sedimentation tank 26, and an output end of the vertical sedimentation tank 26 is a water outlet pipe 25 for discharging purified water. The purified water entering the secondary sedimentation tank 15 carries sludge, the sludge is sunk into the lower second cone structure 52 under the action of the vertical flow type precipitator 26, the water-containing sludge flows back to the regulating tank 6 through the return pipe 16, and the supernatant is discharged into a natural water body through the water outlet pipe 25.

When the water amount in the adjusting tank 6 is small, the water return operation mode can be started, specifically, a return pipe 16 is arranged at the bottom of the secondary sedimentation tank 15, the output end of the return pipe 16 is communicated with the adjusting tank 6 through the return pipe 16, and an electric valve 17 is arranged at the output end of the return pipe 16. When the water volume is continuously large, the liquid level of the adjusting tank 6 reaches the control height of the first liquid level controller 71, the electric lift pump 8 is automatically started, the liquid level is higher than the control liquid level of the second liquid level controller 72 at the moment, the electric valve 17 is closed, the return pipe 16 cannot return, and the purified water is discharged out of the system from the water outlet pipe 25.

Example 5

Based on the sewage purification treatment system described in the above embodiment 1-4, the system can achieve unattended effect, can automatically operate for a long time, and specifically, is suitable for a sewage purification treatment system, and further comprises a PLC controller 22, a first level controller 71, and a second level controller 72, wherein an overrun pipe 23 is provided at a position of the side wall of the regulation tank 6 near the top, the first level controller 71 and the second level controller 72 are respectively installed at the highest point and the lowest point of the normal treatment water level of the regulation tank 6, and form a water level height signal when the liquid level height in the regulation tank 6 reaches the first level controller 71 and the second level controller 72; the PLC 22 is respectively in signal connection with the first liquid level controller 71, the second liquid level controller 72, the electric valve 17 and the electric lift pump 8, and the PLC 22 is used for receiving water level height signals sent by the first liquid level controller 71 and the second liquid level controller 72 and issuing switching opening and closing instructions to the electric valve 17 and the electric lift pump 8 according to the water level height. The timing and rhythm of use of the PLC controller 22 will be described in detail with reference to the following operating state of the present system.

When the normal use condition is intermittent water supply, when the liquid level of the regulating tank 6 reaches the control height of the first liquid level controller 71, the electric lift pump 8 is automatically started, the system runs, the electric valve 17 is closed at the moment, and the purified water is discharged from the water outlet pipe 25. When the liquid level is lower than the liquid level controlled by the second liquid level controller 72, the PLC 22 automatically opens the electric valve 17, and the purified water flows back to replenish the liquid level of the regulating reservoir 6. When the replenishing water level is higher than the liquid level controlled by the second liquid level controller 72, the electric valve 17 is closed, the circulation is carried out, the whole operation is controlled by time and the liquid level, and the average operation time is 15-30min each time. When the water volume is continuously large and the liquid level of the adjusting tank 6 reaches the control height of the first liquid level controller 71, the electric lift pump 8 is automatically started, the liquid level is higher than the control liquid level of the second liquid level controller 72, the electric valve 17 is closed, the return pipe 16 cannot return, and the purified water is discharged out of the system from the water outlet pipe 25. When the amount of the incoming water is small or no water is supplied for a long time, the liquid level cannot reach the height controlled by the first liquid level controller 71, and the system is started to operate once every 3-4 hours in order to ensure the survival of the microorganisms in the system. That is, the PLC controller 22 controls the electric valve 17 to open first, returns the water stored in the secondary sedimentation tank 15 to the adjusting tank 6, and turns on the electric lift pump 8 to operate the system. Because the water quantity in the whole system is less, the electric valve 17 is always opened, the purified water flows back completely, and the circulation is carried out, at the moment, because the organic matters in the sewage are reduced, the microorganisms in the system automatically enter an endogenous respiration period, the survival of the microorganisms is ensured, the normal operation of the system in the lowest state is ensured, and the operation time is 15-30min each time. The PLC controller 22 may operate through an automatic liquid level and time control system, and the power supply used is external mains supply or a solar power generation system is selected according to scale, or solar energy and mains supply are selected together for power supply. And manual control can be adopted instead of PLC control. In addition, a monitoring camera can be additionally arranged for video monitoring, and remote viewing and remote control are realized through a wireless network.

The sewage purification treatment systems in the above embodiments 1 to 5 have other structural optimization and functional options, which are specifically as follows:

a grid well 1 is arranged at a sewage inlet of the oil separation sedimentation tank 2, a thick grid is arranged in the grid well 1, the interval of grid bars is 20-100mm, and the grid well 1 needs to be regularly cleaned. Mechanical grates may also be selected depending on the scale of the process. The fine grids 4 are communicated with the oil separation sedimentation tank 2 and the adjusting tank 6, the grid distance of the fine grids 4 is 1.5-10mm, and large-particle-size suspended matters are separated and blocked, so that the normal operation of a subsequent system is ensured.

In addition, the sprayer 10 can be provided with a plurality of groups, so that the sewage is fully combined with oxygen in the air to provide oxygen for the subsequent microorganism propagation.

The liquid level of the filtering tank 21 in the system is higher than that of the regulating tank 6, the filtering tank 21 runs with full water all the year round, and the third valve 183 can be opened for emptying if emptying for maintenance is needed. The filtering tank 21 can be installed separately from the oil separation sedimentation tank 2 and the adjusting tank 6, and the filtering tank 21 can be installed in a fully-overground type, a semi-underground type or an underground type according to the liquid level of natural water.

The top of the oil-separation sedimentation tank 2 is provided with a manhole 27, so that sediments and oil stains can be periodically and manually removed, and the normal operation of the system is ensured. The bottom of oil separating sedimentation tank 2 is equipped with first awl fill structure 51, and oil separating sedimentation tank 2 still has outer calandria 3 of precipitate, and the input setting of outer calandria 3 of precipitate gathers together the department in the lower part of oil separating sedimentation tank 2's first awl fill structure 51, can regularly through mechanical cleaning's such as dung suction truck mode suction first awl fill structure 51 the lower part gather together the sediment of department.

The bottom of the secondary sedimentation tank 15 is provided with a second cone structure 52, and the input end of the return pipe 16 is arranged at the gathering part of the lower part of the second cone structure 52 of the secondary sedimentation tank 15. The bottom of the secondary sedimentation tank 15 is provided with a second cone structure 52 for collecting small particles, so as to avoid the mixture of the effluent of the water outlet pipe 25 and the residual particles.

When the system is used, because the elevation has a certain effect of facilitating the control of the water level height, the elevation of the inner bottom of the fourth valve 184 is preferably lower than the elevation of the filtering tank 21 in the invention, so that the treated purified water can automatically flow into the secondary sedimentation tank 15 through the perforated collecting pipe. The elevation of the inner bottom of the water outlet pipe 25 is lower than that of the fourth valve 184, so that the purified water can be automatically drained into natural water. The elevation of the bottom of the secondary sedimentation tank 15 is higher than the elevation of the liquid level of the regulating tank 6, and the pipeline is arranged at the bottom of the secondary sedimentation tank 15, so that purified water can automatically flow back to the regulating tank 6 to supplement carbon sources and dilute raw water.

In conclusion, when the system is used, rural domestic sewage is collected by a sewage pipe network and then automatically flows into the oil separation and sedimentation system, oil stains in the sewage float on the water surface under the action of gravity, impurities sink into the bottom mud bucket, the middle sewage automatically flows into the pressure aeration system, is lifted and atomized by the electric lifting pump in the pressure aeration system, and then enters the biological treatment system after being combined with oxygen in the air; the biological treatment system is provided with a biological filler with a large specific surface area to provide space for the growth of microorganisms, and sewage is purified under the action of the microorganisms; the purified sewage automatically flows into a precipitation reflux system for precipitation, and precipitated sludge and a certain amount of purified water flow back to a pressure aeration system to supplement a carbon source and dilute raw water; part of the supernatant is discharged into the natural water body. The maintenance system can regularly carry out operations such as cleaning and digging, back flushing maintenance and the like on the system, and can ensure the continuous normal operation of the system. The whole system is automatically controlled, all the steps of lifting, aeration, backflow, backwashing and the like can be realized by only one water pump, and manual intervention is not needed. The system has the advantages of impact resistance, low energy consumption, easy maintenance and high efficiency, and is very suitable for being used in vast rural areas.

The foregoing is only a preferred embodiment of the present invention, and many variations can be made in the specific embodiments and applications of the present invention by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A sewage purification treatment system is characterized in that: the device comprises an oil separation sedimentation tank, a regulating tank, a pressure aeration system and a biological treatment system, wherein the oil separation sedimentation tank is provided with a sewage inlet, and the middle part of the height position of the tank wall of the oil separation sedimentation tank is communicated with the regulating tank;

the biological treatment system comprises a filter tank, biological treatment filler and a perforated water collecting pipe, wherein the biological treatment filler is transversely filled in the filter tank, the sprayer is arranged at the top of the filter tank, the spraying direction of the sprayer faces the top of the high-efficiency biological filler, the perforated water collecting pipe is arranged at the side part and/or the bottom of the filter tank, and the outlet end of the perforated water collecting pipe is arranged outside the filter tank.

2. The sewage purification treatment system according to claim 1, wherein: the sewage purification treatment system also comprises a first three-way pipe fitting and a second three-way pipe fitting, wherein a first port of the first three-way pipe fitting is communicated with the output end of the electric lift pump, a second end of the first three-way pipe fitting is communicated with the inlet and outlet end of the positive output pipeline, a third end of the first three-way pipe fitting is communicated with a first end of the second three-way pipe fitting through a back flushing pipeline, and a second end of the second three-way pipe fitting is communicated with the output end of the perforated water collecting pipe;

3. The sewage purification treatment system according to claim 1, wherein: and the bottom of the filter tank is connected with an emptying pipe, and a third valve is arranged on the emptying pipe.

4. The sewage purification treatment system according to claim 1, wherein: the output end of the perforated water collecting pipe is connected with a secondary sedimentation tank, a vertical flow type precipitator for depositing sediment is arranged in the secondary sedimentation tank, the output end of the perforated water collecting pipe is connected with the input end of the vertical flow type precipitator, and the output end of the vertical flow type precipitator is a water outlet pipe for discharging purified water.

5. The sewage purification treatment system according to claim 4, wherein: the bottom of the secondary sedimentation tank is provided with a return pipe, the output end of the return pipe is communicated with the regulating tank through the return pipe, and the output end of the return pipe is provided with an electric valve.

6. The sewage purification treatment system according to claim 4, wherein: the sewage purification treatment system also comprises a PLC (programmable logic controller), a first liquid level controller and a second liquid level controller, wherein an overrun pipe is arranged at the position, close to the top, of the side wall of the adjusting tank, the first liquid level controller and the second liquid level controller are respectively installed at the highest point and the lowest point of the normal treatment water level of the adjusting tank, and a water level height signal is formed when the liquid level height in the adjusting tank reaches the first liquid level controller and the second liquid level controller;

7. The sewage purification treatment system according to claim 1, wherein: the biological treatment filler comprises an upper gravel filler, a high-efficiency dephosphorization filler, a high-efficiency biological filler and a lower gravel filler which are sequentially arranged from top to bottom, and the perforated water collecting pipe is pre-embedded in the lower gravel filler.

8. The sewage purification treatment system according to claim 1, wherein:

a grid well is arranged at a sewage conveying inlet of the oil separation sedimentation tank;

and a manhole is arranged at the top of the oil separation sedimentation tank.

9. The sewage purification treatment system according to claim 1, wherein: the bottom of the oil separation sedimentation tank is provided with a cone bucket structure, the oil separation sedimentation tank is also provided with an outer sediment discharge pipe, and the input end of the outer sediment discharge pipe is arranged at the gathering position of the lower part of the cone bucket structure of the oil separation sedimentation tank.

10. The sewage purification treatment system according to claim 5, wherein: the bottom in the secondary sedimentation tank is provided with a cone hopper structure, and the input end of the return pipe is arranged at the gathering part of the lower part of the cone hopper structure of the secondary sedimentation tank.