CN111138031B

CN111138031B - High-efficiency energy-saving unpowered rural sewage treatment system

Info

Publication number: CN111138031B
Application number: CN202010012858.5A
Authority: CN
Inventors: 景江; 纪福林; 范天斌; 马海曲干; 牟潇丽; 彭靖; 张欣; 潘祖昊
Original assignee: Sichuan Yiming Environmental Protection Technology Co ltd; Chengdu Technological University CDTU
Current assignee: Sichuan Yiming Environmental Protection Technology Co ltd; Chengdu Technological University CDTU
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2021-03-30
Anticipated expiration: 2040-01-07
Also published as: CN111138031A

Abstract

The invention discloses an efficient and energy-saving unpowered rural sewage treatment system which comprises a device body and a cover body arranged on the device body; the device body comprises an anaerobic zone, an inner ring aerobic zone and an outer ring settling zone; the anaerobic zone is arranged at the bottom of the device body, is communicated with an external septic tank through a water inlet pipe and is communicated with the overflow pipe through a water outlet pipe, and the top of the overflow pipe is provided with a plurality of through holes; the inner ring aerobic zone comprises a first folded paper filter element, a second folded paper filter element, a first water receiving tray, a third folded paper filter element, a fourth folded paper filter element and a second water receiving tray which are arranged below the overflow pipe in sequence; a plurality of water through holes are formed in the first water pan; the inner ring aerobic zone is communicated with the outer ring sedimentation zone through a first water outlet; and a second water outlet is arranged on the outer ring settling zone.

Description

High-efficiency energy-saving unpowered rural sewage treatment system

Technical Field

The invention belongs to the technical field of rural sewage treatment, and particularly relates to an efficient and energy-saving unpowered rural sewage treatment system.

Background

At present, rural economy develops rapidly, and peasant's standard of living is very improved, but rural environmental construction and economic development are asynchronous, and among them the water environmental pollution problem is especially serious. Untreated domestic sewage is discharged at will, so that the water quality of ditches and ponds blackens and becomes smelly, mosquitoes breed, the rural living environment is affected, the physical health of residents is threatened, and meanwhile, the pollution of drinking water sources and the eutrophication of lakes and reservoirs can be caused.

Due to the limitation of economic conditions and the lack of environmental protection consciousness, open channels or closed pipes are mostly used for collecting sewage in rural areas in China, sewage collection facilities are simple and crude, rainwater, spring water and the like can not be distributed, and the collected sewage is complex in composition. The water quantity is increased and the pollutant concentration is reduced due to the release effect, so that the difficulty in collecting and treating the domestic sewage is increased. The extensive discharge mode, simple and crude pipe network facilities and lack of maintenance are important factors causing low collection rate of rural domestic sewage, and open-air runoff and underground leakage of the domestic sewage caused by the low collection rate of rural domestic sewage not only worsen the living environment of villagers, but also easily cause surface and underground water pollution.

Disclosure of Invention

The invention aims to provide an efficient and energy-saving unpowered rural sewage treatment system aiming at the defects in the prior art so as to solve the problem of serious pollution of the existing rural sewage.

In order to achieve the purpose, the invention adopts the technical scheme that:

an efficient energy-saving unpowered rural sewage treatment system comprises a device body and a cover body arranged on the device body;

the device body comprises an anaerobic zone, an inner ring aerobic zone and an outer ring settling zone; the anaerobic zone is arranged at the bottom of the device body, is communicated with an external septic tank through a water inlet pipe and is communicated with the overflow pipe through a water outlet pipe, and the top of the overflow pipe is provided with a plurality of through holes; the inner ring aerobic zone comprises a first folded paper filter element, a second folded paper filter element, a first water receiving tray, a third folded paper filter element, a fourth folded paper filter element and a second water receiving tray which are arranged below the overflow pipe in sequence; a plurality of water through holes are formed in the first water pan; the inner ring aerobic zone is communicated with the outer ring sedimentation zone through a first water outlet; and a second water outlet is arranged on the outer ring settling zone.

Preferably, one side of the device body close to the water inlet is provided with a plurality of horn holes, and the horn holes extend to the inner ring aerobic zone; and the pipelines at the water inlet of the bell mouth are all provided with a fan.

Preferably, the fan is vertically disposed within the water inlet duct.

Preferably, the water outlet pipe is connected with the overflow pipe through a tee.

Preferably, the aperture of the water through hole formed in the first water pan is 6 mm.

Preferably, both sides end of first water collector and second water collector all upwards bends, and the obtuse angle of bending department and horizontal plane is 135.

Preferably, a plurality of microorganism dry powder are distributed in the anaerobic zone.

Preferably, a layer of biological membrane is attached to the surfaces of the filter elements of the first paper folding filter element, the second paper folding filter element, the third paper folding filter element and the fourth paper folding filter element.

Preferably, a sludge discharge pipe communicated with the outside of the device body is arranged in the inner ring aerobic zone.

The high-efficiency energy-saving unpowered rural sewage treatment system provided by the invention has the following beneficial effects:

according to the invention, sewage is led into the anaerobic zone to decompose organic components in the sewage, when the whole anaerobic zone is filled with the sewage, redundant sewage enters the overflow pipe, layer-by-layer filtration of the sewage is realized based on the self-gravity of the sewage, and elements such as organic matters, nitrogen, phosphorus and the like in the sewage are absorbed by combining with a biological membrane attached to the surface of the folded paper filter element, so that the aim of purifying the sewage is achieved through the biochemical reaction of the folded paper filter element; finally, the sewage is guided into an outer ring sedimentation area for sedimentation, and the sewage reaching the standard can be discharged.

Besides, the pipeline of the water inlet is matched with the fan through the bell mouth, the fan is driven to rotate based on the self-gravity of water, and then air outside the device body is introduced into the inner ring aerobic zone, so that the sewage treatment efficiency of the inner ring aerobic zone is improved.

Drawings

FIG. 1 is a structural diagram of a high-efficiency energy-saving unpowered rural sewage treatment system.

FIG. 2 is a fan structure diagram of a high-efficiency energy-saving unpowered rural sewage treatment system.

Wherein, 1, a cover body; 2. a device body; 3. an anaerobic zone; 4. an outer ring settling zone; 5. a vent hole; 6. a water inlet; 7. an overflow pipe; 8. a first paper folding filter element; 9. a second folded paper filter element; 10. a first water pan; 11. a third folded paper filter element; 12. a fourth paper folding filter element; 13. a second water pan; 14. a horn hole; 15. a fan; 16. an inner ring aerobic zone; 17. a first water outlet; 18. a second water outlet; 19. a water outlet pipe; 20. a tee joint; 21. a sludge discharge pipe.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.

According to one embodiment of the application, referring to fig. 1, the energy-efficient unpowered rural sewage treatment system of the scheme comprises a device body 2 and a cover body 1 arranged on the device body 2, wherein the device body 2 is cylindrical.

The device body 2 comprises an anaerobic zone 3, an inner ring aerobic zone 16 and an outer ring settling zone 4, wherein the anaerobic zone 3 is communicated with the inner ring aerobic zone 16 and the outer ring settling zone 4 in sequence.

The details of the anaerobic zone 3, the inner aerobic zone 16 and the outer settling zone 4 are described below.

The anaerobic zone 3, the box in anaerobic zone 3 sets up in device body 2 bottom, is provided with the water inlet 6 that runs through device body 2 in it, and water inlet 6 communicates with the septic tank for with the box of leading-in anaerobic zone 3 of the sewage of septic tank. A plurality of microorganism-added dry powder is put into the anaerobic zone 3, organic matters in the sewage can be absorbed as nutrition in the later period and independently grow, meanwhile, the aerobic microorganisms in the inner ring aerobic zone 16 are combined to absorb organic matters, nitrogen, phosphorus and other elements in the sewage, and the aim of purifying the sewage is achieved through the biochemical reaction of the anaerobic zone.

The top of the anaerobic zone 3 is communicated with a water outlet pipe 19, and after the water in the anaerobic zone 3 is filled, the sewage treated in the upper layer enters the inner ring aerobic zone 16 through the water outlet pipe 19.

The top of a water outlet pipe 19 of the inner ring aerobic zone 16 is communicated with an overflow pipe 7 through a tee joint 20, the overflow pipe 7 is horizontally arranged in the device body 2, and the top of the overflow pipe 7 is provided with a plurality of through holes; a first folded paper filter element 8, a second folded paper filter element 9, a first water receiving tray 10, a third folded paper filter element 11 and a fourth folded paper filter element 12 are sequentially arranged below the overflow pipe 7.

The surfaces of the filter elements of the first paper folding filter element 8, the second paper folding filter element 9, the third paper folding filter element 11 and the fourth paper folding filter element 12 are adhered with a layer of biomembrane, and aerobic organisms are arranged on the biomembrane.

Wherein, all seted up a plurality of limbers on first water collector 10 and the second water collector 13, the limbers aperture of seting up on the first water collector 10 is 6mm, and the both sides end of first water collector 10 and second water collector 13 all kicks up, and the obtuse angle of bend and horizontal plane is 135, and the bend can play the effect that sewage was collected.

When the whole pipeline is filled with sewage in the overflow pipe 7, redundant moisture can flow out from the through hole at the top of the overflow pipe 7, the flowing sewage is left by gravity and flows down sequentially through the first paper folding filter element 8, the second paper folding filter element 9, the first water receiving tray 10, the third paper folding filter element 11, the fourth paper folding filter element 12 and the second water receiving tray 13, the sewage flows through the surface of the multilayer biological membrane to be purified, air flows through the axial direction, the contact area between the air and oxygen is increased, and the effect is better.

A sludge discharge pipe 21 communicated with the outside of the device body 2 is arranged in the inner ring aerobic zone 3 and used for realizing the discharge of sludge.

This scheme sets up first water collector 10 after first paper filter core 8 and the second paper filter core 9 of rolling over, and first water collector 10 can filter sewage, detach some impurity. When sewage flows through third folded paper filter core 11, fourth folded paper filter core 12 and second water collector 13 in proper order afterwards, second water collector 13 can filter sewage once more, increases the filter effect of sewage.

The sewage flowing down from the second water receiving tray 13 enters the outer ring settling zone 4 through a plurality of first water outlets 17.

An outer ring sedimentation zone 4, the treated sewage is precipitated in the outer ring sedimentation zone 4, and COD in the precipitated sewage<50mg/L，BOD<10mg/L, TN (total Nitrogen)<15mg/L, TP (Total phosphorus)<0.5mg/L, meets the national discharge standard, discharges the sewage up to the standard from the second water outlet 18, is used for irrigation, planting and breeding of farmlands, is mainly applied to rural sewage treatment, and has the treatment capacity of 1-5 m³The day is.

Referring to fig. 2, a plurality of bell-mouthed holes 14 are formed in one side of the device body 2 close to the water inlet 6, the bell-mouthed holes 14 extend to the inner ring aerobic zone 16, and a fan 15 is mounted on each of the pipes located at the water inlet 6 of the bell mouth.

The fans 15 are vertically arranged in the water inlet 6 pipeline, and an angle exists between fan blades in the fans 15 and the sewage flow direction of vertical falling, namely when the sewage vertically flows downwards, the fan blades are impacted, so that the fans 15 are driven to rotate, air outside the device body 2 is introduced into the inner ring aerobic zone 16, and oxygen in the inner ring aerobic zone 16 is increased. Meanwhile, the inner ring aerobic zone 16 can be exhausted through the vent holes 5, thereby forming an air flow circulation.

The scheme is suitable for ground installation and underground installation; and the working water level is located below the second water receiving tray 13.

Meanwhile, the aeration mode of the scheme comprises a fan aeration mode A and a drop aeration mode B, and the two aeration modes are adopted.

According to one embodiment of the application, the working principle of the high-efficiency energy-saving unpowered rural sewage treatment system is as follows:

sewage enters the box body of the anaerobic zone 3 from the water inlet 6 and organic impurities in the sewage are decomposed; when the anaerobic zone 3 is full of water, the upper layer of treated sewage enters the overflow pipe 7 in the inner ring aerobic zone 16 through the water outlet pipe 19.

When the whole pipeline is filled with sewage in the overflow pipe 7, overflowed water flows out from the through hole at the top of the overflow pipe 7, the outflowing sewage flows downwards automatically according to gravity and sequentially passes through the first paper folding filter element 8, the second paper folding filter element 9, the first water receiving tray 10, the third paper folding filter element 11, the fourth paper folding filter element 12 and the second water receiving tray 13, the sewage flows through the surface of the multilayer biological membrane to be purified, air flows through the axial direction, the contact area between the air and oxygen is increased, and the effect is better.

Meanwhile, as sewage continuously enters the device body 2 from the water inlet 6, when the sewage vertically flows downwards, the fan blades are impacted, and then the fan 15 is driven to rotate, air outside the device body 2 is introduced into the inner ring aerobic zone 16, and oxygen in the inner ring aerobic zone 16 is increased. Meanwhile, the inner ring aerobic zone 16 can be exhausted through the vent holes 5, thereby forming an air flow circulation.

The treated sewage is precipitated in the outer ring precipitation area 4, COD (chemical oxygen demand) in the precipitated sewage is less than 50mg/L, BOD (biochemical oxygen demand) is less than 10mg/L, TN (total nitrogen) is less than 15mg/L, TP (total phosphorus) is less than 0.5mg/L, the national discharge standard is met, and the sewage reaching the standard is discharged from the second water outlet 18 and is used for irrigation, planting and breeding of farmlands.

According to the invention, sewage is led into the anaerobic zone 3 to decompose organic components in the sewage, when the whole anaerobic zone 3 is filled with the sewage, redundant sewage enters the overflow pipe 7, layer-by-layer filtration of the sewage is realized based on the self-gravity of the sewage, and elements such as organic matters, nitrogen, phosphorus and the like in the sewage are absorbed by combining with a biological film attached to the surface of the folded paper filter element, so that the aim of purifying the sewage is achieved through the biochemical reaction of the folded paper filter element; finally, the sewage is guided into the outer ring precipitation zone 4 for precipitation, and the sewage reaching the standard can be discharged.

Besides, the invention drives the fan 15 to rotate based on the self-gravity of water by matching the bell mouth and the fan 15 on the pipeline of the water inlet 6, so that the air outside the device body 2 is introduced into the inner ring aerobic zone 16, and the sewage treatment efficiency of the inner ring aerobic zone 16 is improved.

While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims

1. The utility model provides a rural sewage treatment system of high-efficient energy-conserving unpowered which characterized in that: comprises a device body and a cover body arranged on the device body;

the device body comprises an anaerobic zone, an inner ring aerobic zone and an outer ring settling zone; the anaerobic zone is arranged at the bottom of the device body, is communicated with an external septic tank through a water inlet pipe and is communicated with the overflow pipe through a water outlet pipe, and the top of the overflow pipe is provided with a plurality of through holes; the inner ring aerobic zone comprises a first folded paper filter element, a second folded paper filter element, a first water receiving tray, a third folded paper filter element, a fourth folded paper filter element and a second water receiving tray which are arranged below the overflow pipe in sequence; a plurality of water through holes are formed in the first water receiving tray; the inner ring aerobic zone is communicated with the outer ring sedimentation zone through a first water outlet; a second water outlet is formed in the outer ring settling zone;

a plurality of horn holes are formed in one side, close to the water inlet, of the device body, and the horn holes extend to the inner ring aerobic zone; the pipelines at the water inlet of the horn hole are respectively provided with a fan;

the fan is vertically arranged in the water inlet pipeline;

the water outlet pipe is connected with the overflow pipe through a tee;

the aperture of a water through hole formed in the first water pan is 6 mm;

the two side ends of the first water pan and the second water pan are both bent upwards, and the obtuse angle between the bent part and the horizontal plane is 135 degrees;

a plurality of microorganism dry powder are distributed in the anaerobic zone;

a layer of biological membrane is attached to the surfaces of the filter elements of the first paper folding filter element, the second paper folding filter element, the third paper folding filter element and the fourth paper folding filter element;

a sludge discharge pipe communicated with the outside of the device body is arranged in the inner ring aerobic zone.