CN210855698U

CN210855698U - Semi-buried sewage treatment system for village and town garbage compression station

Info

Publication number: CN210855698U
Application number: CN201921444687.2U
Authority: CN
Inventors: 陈雷; 瞿雄
Original assignee: Wuhan Wanan Environmental Protection Engineering Technology Co ltd
Current assignee: Wuhan Wanan Environmental Protection Engineering Technology Co ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-06-26
Anticipated expiration: 2029-09-02

Abstract

The utility model discloses a bury formula rural area town rubbish compression station sewage treatment system partly, include: the integrated sewage treatment device is located on the ground, a guide cylinder is arranged in the anaerobic baffle plate reactor close to the sewage collection tank, the guide cylinder is of a structure with a closed top end and an open bottom end, a guide pipe is arranged on one side of the guide cylinder, the guide pipe comprises a horizontal pipe communicated with a sewage inlet and a vertical pipe communicated with the horizontal pipe, and the vertical pipe is located in the middle of the guide cylinder. The utility model provides a pair of bury formula rural and town rubbish compression station sewage treatment system, through integrating the design, have that area is little, the installation is simple, go out the characteristics that water quality of water is good, discharge after reaching the standard with rural and town rubbish compression station sewage after on-the-spot treatment.

Description

Semi-buried sewage treatment system for village and town garbage compression station

Technical Field

The utility model relates to a sewage treatment technical field of rural area and town rubbish compression station specifically relates to a partly bury formula rural area and town rubbish compression station sewage treatment system.

Background

The village and town garbage compression station can generate mixed sewage after sewage is collected in the processes of garbage stacking, squeezing, ground and vehicle washing and the like, namely the sewage of the village and town garbage compression station. The mixed sewage has the characteristics of high chromaticity, high COD (chemical oxygen demand), ammonia nitrogen, high heavy metal concentration and the like, and simultaneously, as the current rural garbage classification system is not complete, part of kitchen garbage is mixed into the rural garbage, so that the sewage of the garbage compression station also contains oil substances with higher concentration. Therefore, the sewage of the garbage compression station belongs to high-concentration organic wastewater with great treatment difficulty.

The rural garbage compression stations are located in remote areas, the daily accumulated amount of sewage is about 3 tons, and the rural garbage compression stations are usually transported to urban garbage landfill sites or garbage incineration plants together with garbage transport vehicles. However, the distance between the urban refuse landfill or the refuse incineration plant and the rural refuse compression station is long, the planning area of the rural refuse compression station is limited, and the daily stored sewage must be timely transported and treated, so that the high cost of the transportation and treatment of the sewage of the rural refuse compression station is caused. Under the pressure of operating cost, the current situation of sewage treatment of the village and town garbage compression station is as follows: a. the part of compression stations covering the municipal sewage pipe network is selected to be simply precipitated and then discharged into the municipal pipe network, and high-concentration pollutants in sewage cause the concentration of the inflow pollutants of the urban sewage treatment plant to exceed the standard, and even possibly cause the system of the urban sewage treatment plant to crash. b. The part of the garbage compression stations without municipal pipe network coverage is directly discharged into the surface water environment after simple precipitation treatment, which causes serious environmental pollution.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a bury formula rural area town rubbish compression station sewage treatment system partly, include:

the sewage collecting tank is located underground, a first sewage lifting pump is arranged in the sewage collecting tank, and a first sewage pipeline is arranged at a water outlet of the first sewage lifting pump;

the anaerobic baffle plate reactor is positioned underground, one side of the anaerobic baffle plate reactor is provided with a sewage inlet connected with the water outlet of the first sewage pipeline, the other side of the anaerobic baffle plate reactor is provided with a sewage outlet, and the sewage outlet is provided with a second sewage pipeline;

the integrated sewage treatment device is positioned on the ground, the integrated sewage treatment device comprises a frame and a sewage treatment pipeline arranged on the frame, the sewage treatment pipeline comprises a pipeline filter, the water inlet of the pipeline filter is connected with the water outlet of a second sewage pipeline through a second sewage lifting pump, the water outlet of the pipeline filter is connected with the water inlet of an oil removal filter, the water outlet of the oil removal filter is connected with the water inlet of a sewage tank, the water outlet of the sewage tank is connected with the water inlet of a sand filter, the water outlet of the sand filter is connected with the water inlet of a core filter, the water outlet of the core filter is connected with the water inlet of a first-stage high-pressure reverse osmosis membrane, the concentrated water outlet of the first-stage high-pressure reverse osmosis membrane is connected with a concentrated water storage tank, and the clear water outlet of the first-stage high-pressure reverse osmosis membrane is, the concentrated water outlet of the second-stage high-pressure reverse osmosis membrane is connected with the first sewage backflow port of the sewage tank, the clear water outlet of the second-stage high-pressure reverse osmosis membrane is provided with a discharge pipeline, and the discharge pipeline is provided with a discharge valve.

Furthermore, a guide cylinder is arranged in the anaerobic baffle plate reactor close to the sewage collecting tank, the guide cylinder is of a structure with a closed top end and an open bottom end, a guide pipe is arranged on one side of the guide cylinder, the guide pipe comprises a horizontal pipe communicated with the sewage inlet and a vertical pipe communicated with the horizontal pipe, and the vertical pipe is positioned in the middle of the guide cylinder.

Furthermore, the bottom of draft tube is provided with the splice bar, the lower part of splice bar is provided with the slope reflecting plate.

Further, the included angle between the inclined reflection plate and the horizontal plane is 17 degrees.

Furthermore, a booster pump, a first water inlet valve and a first pressure sensor are sequentially arranged between the water outlet of the sewage tank and the water inlet of the sand filter, and a second pressure sensor, a first water outlet valve and a second water inlet valve are sequentially arranged between the water outlet of the sand filter and the water inlet of the core filter; still include first bypass line, the water inlet setting of first bypass line is in the booster pump with between the first water intaking valve, the delivery port setting of first bypass line is in first outlet valve with between the second water intaking valve, be provided with first bypass valve on the first bypass line.

Further, still including acidification device, return line, acidification device is including storing up the sour jar, the export of storing up the sour jar is provided with acidification pipe, acidification pipe links to each other with acidification pump's entry, acidification pump's export with sewage tank's notes acid mouth links to each other, return line's water inlet is located the booster pump with between the first water intaking valve, return line's delivery port with sewage tank's second sewage backward flow mouth links to each other, be provided with the sewage return valve on the return line.

Further, the scale inhibitor adding device comprises a scale inhibitor tank, a dosing pipe is arranged at the outlet of the scale inhibitor tank and connected with the inlet of a dosing pump, and the outlet of the dosing pump is connected with the water inlet of the core type filter.

Furthermore, a first-stage water inlet valve, a first pressure switch, a first-stage high-pressure pump and a first-stage shock absorber are sequentially arranged between the water outlet of the core filter and the water inlet of the first-stage high-pressure reverse osmosis membrane, and a first-stage water outlet valve, a third pressure switch, a second-stage high-pressure pump and a second-stage shock absorber are sequentially arranged between the clear water outlet of the first-stage high-pressure reverse osmosis membrane and the water inlet of the second-stage high-pressure reverse osmosis membrane; a first-stage concentrated water pressure regulating valve, a second pressure switch and a pressure regulating valve are sequentially arranged between the concentrated water outlet of the first-stage high-pressure reverse osmosis membrane and the concentrated water storage tank; the water inlet of the second bypass pipeline is arranged between the water outlet of the core type filter and the first-stage water inlet valve, the water outlet of the second bypass pipeline is arranged between the third pressure switch and the first-stage water outlet valve, and a second bypass valve is arranged on the second bypass pipeline.

The water inlet of the first-stage concentrated water circulation pipeline is arranged between the second pressure switch and the pressure regulating valve, the water outlet of the concentrated water circulation pipeline is arranged between the first-stage water inlet valve and the first pressure switch, and the first-stage circulating pressure regulating valve is arranged on the concentrated water circulation pipeline.

Further, the sewage treatment device also comprises a first-stage concentrated water return pipeline, wherein a water inlet of the first-stage concentrated water return pipeline is arranged between the second pressure switch and the pressure regulating valve, a water outlet of the first-stage concentrated water return pipeline is connected with a third sewage return port of the sewage tank, and a first-stage concentrated water return valve is arranged on the concentrated water return pipeline.

The utility model provides a pair of bury formula rural area rubbish compression station sewage treatment system partly through integrating the design, has that area is little, the installation is simple, go out the characteristics that water quality of water is good, reaches discharge after rural area rubbish compression station sewage is handled on the spot in municipal administration sewage pipe network or surface water environment after the pollution control standard of "domestic waste landfill" (GB 16889 one-sidedly 2008) standard. Specifically, the utility model discloses following beneficial effect has:

1. aiming at fresh garbage stacked in a village and town garbage compression station, the generated sewage has the characteristic of good biochemical property, and the anaerobic baffle plate reactor is designed for pretreatment, so that the concentration of organic pollutants in the sewage can be effectively reduced, the subsequent treatment load of a high-pressure reverse osmosis membrane is reduced, and the service life of a system device is prolonged. In addition, the anaerobic baffle reactor has the characteristics of high treatment efficiency, small floor area and buried installation, so that the anaerobic baffle reactor is particularly suitable for a rural garbage compression station. Through the anaerobic baffle reactor, the pH value of the sewage can be reduced under the hydrolysis acidification reaction, the addition amount of the subsequent acidic solution can be effectively reduced, and even the addition of the acidic solution can be omitted, so that the running cost of a system device is reduced. In addition, the anaerobic baffle reactor can preliminarily decompose oil macromolecular substances in the sewage, the load of a subsequent oil removal filter can be reduced, and the service life of the oil removal filter filler is prolonged.

2. Aiming at the characteristic that the sewage quality of the garbage compression station in villages and towns contains oil, the pretreatment unit of the oil removal filter is designed, so that the oil content of the membrane-entering sewage is effectively controlled, the oil pollution of a high-pressure reverse osmosis membrane is avoided, and the service life of a system device is prolonged.

3. Aiming at the characteristic that sewage water amount of the garbage compression station in villages and towns is small, the return pipeline has a stirring function, mechanical stirring configuration is omitted, and power consumption of a system device is reduced. Meanwhile, sewage backflow is in contact with air to oxygenate sewage, so that oxygen is provided for microorganisms growing in the filler in the sewage tank, organic pollutants in the sewage are degraded, partial free ammonia is oxidized, the load of a subsequent treatment unit is reduced, and the service life of a system device is prolonged.

4. The primary shock absorber and the secondary shock absorber ensure that the corresponding membrane columns are stable and high in pressure, meanwhile, the vibration displacement of the pipeline valve is controllable, and the service life of the system device is prolonged.

5. Concentrated water generated by the first-stage high-pressure reverse osmosis membrane is sent to the front end of the first-stage high-pressure pump again through the pressure regulating valve and the concentrated water circulating pipeline, so that high scouring flow rate of the membrane surface is guaranteed, and the pollution rate of the first-stage high-pressure reverse osmosis membrane is slowed down.

6. Through the intensification design, the utility model discloses when system device washs, compare with conventional membrane filter equipment, need not configuration washing water tank, washing charge device, liquid medicine filter equipment etc. make system device compact structure, area reduces.

Drawings

FIG. 1 is a schematic structural view of a sewage treatment system of a semi-buried type rural garbage compression station provided by the present invention;

fig. 2 is a schematic structural diagram of a draft tube provided by the present invention;

FIG. 3 is a schematic structural view of a sewage tank, a sand filter and a core filter provided by the present invention;

wherein, 1, a sewage collecting tank; 11. a first sewage lift pump; 12. a first liquid level meter; 13. a first sewer line; 2. an anaerobic baffled reactor; 21. a partition plate; 22. a baffle plate; 23. a draft tube; 24. a sewage inlet; 25. a sewage outlet; 26. a second sewer line; 27. a second level gauge; 28. a horizontal tube; 29. a vertical tube; 210. connecting ribs; 211. a tilted reflection plate; 3. a sewage tank; 31. a second sewage lift pump; 32. a pipeline filter; 33. an oil removing filter; 34. a water inlet of the sewage tank; 35. an acid injection port; 36. a third sewage return port; 37. a first sewage return port; 38. a second sewage return port; 39. a return line; 310. a sewage return valve; 311. an evacuation valve; 312. evacuating the line; 313. a water outlet of the sewage tank; 314. an overflow line; 315. a third liquid level meter; 316. a pH sensor; 4. an acid storage tank; 41. adding an acid pipe; 42. adding an acid pump; 43. a fourth liquid level meter; 5. a sand filter; 51. a booster pump; 52. a sand filtration blowdown valve; 53. a sand filtration blow-off pipe; 54. a first water inlet valve; 55. a first water outlet valve; 56. a first pressure sensor; 57. a second pressure sensor; 58. a first bypass valve; 59. a first bypass line; 6. a cartridge filter; 61. a second water inlet valve; 62. a water inlet of the cartridge filter; 63. a water outlet of the cartridge filter; 7. a first-stage high-pressure reverse osmosis membrane; 71. a first-stage water inlet valve 72 and a first pressure switch; 73. a first stage high pressure pump; 74. a primary shock absorber; 75. a first-stage concentrated water pressure regulating valve; 76. a second pressure switch; 77. a pressure regulating valve; 78. a concentrated water storage tank; 79. a primary circulating pressure regulating valve; 710. a first-stage concentrated water reflux valve; 711. a first-stage water outlet circulating valve; 712. a primary water outlet valve; 8. a secondary high-pressure reverse osmosis membrane; 81 a third pressure switch; 82. a second stage high pressure pump; 83. a secondary shock absorber; 84. a second-stage concentrated water pressure regulating valve; 85. a fourth pressure switch; 86. a discharge valve; 87. a fifth pressure switch; 88. a second-stage effluent reflux valve; 89. a second bypass valve; 9. a scale inhibitor tank; 91. a medicine feeding pipe; 92. a dosing pump; 93. and a fifth liquid level meter.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "disposed" are to be construed broadly, and may for example be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 3, the utility model provides a partly bury formula rural area rubbish compression station sewage treatment system, include: a sewage collecting tank 1, an anaerobic baffle reactor 2 and an integrated sewage treatment device.

The sewage collecting tank 1 is located underground, a first sewage lifting pump 11 is arranged in the sewage collecting tank 1, and a first sewage pipeline 13 is arranged at a water outlet of the first sewage lifting pump 11. The sewage collecting tank collects the sewage of preliminary sedimentation, and the sewage is conveyed into the anaerobic baffle plate reactor 2 through the first sewage lifting pump to carry out anaerobic biological treatment, wherein the first liquid level meter 12 is arranged in the sewage collecting tank, and when the liquid level is too low, the first sewage lifting pump is automatically closed to prevent the pump from being damaged due to dry suction; the first sewage lift pump is a submersible sewage pump or a floating pump.

The anaerobic baffle reactor 2 is located underground, one side of the anaerobic baffle reactor 2 is provided with a sewage inlet 24 connected with the water outlet of the first sewage pipeline 13, the other side of the anaerobic baffle reactor 2 is provided with a sewage outlet 25, and the sewage outlet 25 is provided with a second sewage pipeline 26. Specifically, the anaerobic baffle reactor 2 comprises a reactor body, the reactor body is internally divided into at least two independent chambers through partition plates 21, the upper parts of the chambers are independent, and the lower parts of the chambers are communicated with each other; each of the compartments is divided by a baffle 22 into an upstream upflow compartment and a downstream downflow compartment; a guide cylinder 23 is arranged in a grid chamber close to the sewage collecting tank, as shown in fig. 2, the guide cylinder 23 is of a structure with a closed top end and an open bottom end, a guide pipe is arranged on one side of the guide cylinder 23, the guide pipe comprises a horizontal pipe 28 communicated with the sewage inlet 24 and a vertical pipe 29 communicated with the horizontal pipe 28, and the vertical pipe 29 is positioned in the middle of the guide cylinder 23; the bottom end of the guide shell 23 is provided with a connecting rib 210, and the lower part of the connecting rib 210 is provided with an inclined reflecting plate 211; the included angle between the inclined reflecting plate 211 and the horizontal plane is 17 degrees, the inclined reflecting plate is a circular plate, the distance between the central point of the circular plate and the bottom end of the guide cylinder is 0.25-0.5 m, so that the inlet water is uniformly distributed, and the performance in the anaerobic baffle plate reactor is not influenced.

The number of the grid chambers is 6-8, the sewage inlet is positioned at the lower part of the side wall of the first grid chamber, the middle part in each grid chamber is provided with a filler, the filler is a PP multi-surface hollow sphere suspended filler, a PP three-dimensional elastic filler or a polyurethane sponge suspended filler, the filler can reduce anaerobic sludge loss, and microorganisms grow on the filler in a film-hanging manner, so that the treatment efficiency of the anaerobic reactor is improved; the last cell is provided with a second liquid level meter

The integrated sewage treatment device is located on the ground and comprises a rack and a sewage treatment pipeline arranged on the rack, wherein the length of the rack is 1.5-2 m, the width of the rack is 1.5-2 m, the height of the rack is 2.3-3 m, and universal wheels are arranged at the bottom of the rack and are convenient to move; as shown in fig. 1, the sewage treatment pipeline comprises a pipeline filter 32, a water inlet of the pipeline filter 32 is connected with a water outlet of the second sewage pipeline 26 through a second sewage lift pump 31, a water outlet of the pipeline filter 32 is connected with a water inlet of an oil removal filter 33, a water outlet of the oil removal filter 33 is connected with a water inlet 34 of a sewage tank, a water outlet 313 of the sewage tank is connected with a water inlet of a sand filter 5, a water outlet of the sand filter 5 is connected with a water inlet of a core type filter 6, a water outlet of the core type filter 6 is connected with a water inlet of a primary high-pressure reverse osmosis membrane 7, a concentrated water outlet of the primary high-pressure reverse osmosis membrane 7 is connected with a concentrated water storage tank 78, a clear water outlet of the primary high-pressure reverse osmosis membrane 7 is connected with a water inlet of a secondary high-pressure reverse osmosis membrane 8, and a concentrated water outlet of the secondary high-, and a discharge pipeline is arranged at a clean water outlet of the second-stage high-pressure reverse osmosis membrane 8, and a fifth pressure switch 87 and a discharge valve 86 are arranged on the discharge pipeline.

The second sewage lifting pump conveys the sewage in the anaerobic baffle plate reactor to a pipeline filter for primary filtration, then the sewage enters an oil removal filter for removing oil substances, and then the sewage enters a sewage tank; when the second liquid level meter prompts that the liquid level is too low, the second sewage lifting pump is automatically turned off to prevent the pump from being damaged due to dry suction, and the second sewage lifting pump is a self-sucking pump or a screw pump and has the power of more than 0.25-0.6 kw; the pipeline filter is a basket filter or a Y-shaped filter, and the filtering precision is 0.5-1 mm; the filter material filled in the oil removing filter is a walnut shell or modified polyester fiber filter material.

As shown in fig. 3, a first sewage backflow port 37, a second sewage backflow port 38, a third sewage backflow port 36 and an acid injection port 35 are arranged at the top of the sewage tank, a booster pump 51, a first water inlet valve 54 and a first pressure sensor 56 are sequentially arranged between a water outlet 313 of the sewage tank and a water inlet of the sand filter 5, and a second pressure sensor 57, a first water outlet valve 55 and a second water inlet valve 61 are sequentially arranged between a water outlet of the sand filter 5 and a water inlet of the core filter 6; the first bypass pipeline 59 is arranged between the booster pump 51 and the first water inlet valve 54, the water outlet of the first bypass pipeline 59 is arranged between the first water outlet valve 55 and the second water inlet valve 61, and the first bypass pipeline 59 is provided with a first bypass valve 58; the device comprises an acid adding device and a return pipeline 39, wherein the acid adding device comprises an acid storage tank 4, an acid adding pipe 41 is arranged at the outlet of the acid storage tank 4, the acid adding pipe 41 is connected with the inlet of an acid adding pump 42, and the outlet of the acid adding pump 42 is connected with an acid injection port 35 of the sewage tank 3; as shown in fig. 3, the water inlet of the return line 39 is located between the booster pump 51 and the first water inlet valve 54, the water outlet of the return line 39 is connected to the second sewage return port 38 of the sewage tank, and the return line 39 is provided with a sewage return valve 310.

Acid solution in the acid storage tank gets into the sewage jar through adding the acid pump, simultaneously under the effect of booster pump, through return line, partial sewage flows back to the sewage jar to play the effect of stirring even quality of water, make the sewage PH control in the sewage jar 6.2 ~ 6.7, prevent the inorganic salt scale deposit in the sewage, make free ammonia in the sewage and acid radical ion form ammonium salt in addition, improve the clearance of ammonia nitrogen in the sewage. And if the pH value of the sewage is between 6.3 and 6.7, closing the acid adding pump and the sewage backflow valve. Specifically, a pH sensor is arranged in the sewage tank, and the start and stop of the acid adding pump and the opening and closing of the sewage reflux valve are controlled through electric signal transmission; install third level gauge 315 in the sewage jar, install fourth level gauge 43 in the acetic acid jar, when third level gauge or fourth level gauge suggestion liquid level were low excessively, closed acid adding pump or booster pump, prevent that the pump from inhaling futilely and leading to damaging, control system reminds to supply acid solution in the acid storage tank simultaneously. The sewage tank is made of PP or PE, the suspended filler is filled in the sewage tank, and the suspended filler is one of HDPE (high-density polyethylene) biological filler, PP combined filler or polyurethane sponge suspended filler; the microorganisms grow in the suspended filler in a biofilm mode, and in the process of contacting the sewage backflow with air, the sewage can be oxygenated to provide oxygen for the growth of the microorganisms, so that organic matters in the sewage are degraded, and part of free ammonia can be oxidized into nitrate nitrogen under the action of nitrobacteria, and therefore the concentration of pollutants in the sewage can be further reduced. The material of the acid storage tank is Q235 or PP, and the acid solution stored in the acid storage tank is sulfuric acid, hydrochloric acid or acetic acid. The acid adding pump is a diaphragm metering pump, and the pump head of the acid adding pump is made of PTFE or PVDF. The sewage tank bottom is provided with evacuation pipeline 312, the play water end of evacuation pipeline with the sewage collection station links to each other, is provided with blowoff valve 311 on the evacuation pipeline, and the blowoff valve is manual ball valve. The booster pump is a horizontal pipeline centrifugal pump or a vertical pipeline centrifugal pump, and the lift of the booster pump is 20-33 m. The sewage backflow valve is an electric pressure regulating valve and can automatically control the backflow amount of sewage and the water inflow amount of the sewage to the sand filter.

A sand filtration sewage draining pipe 53 is arranged at the lower part of the sand filter 5, the water outlet end of the sand filtration sewage draining pipe is connected with the sewage collecting station, and a sand filtration sewage draining valve 52 is arranged on the sand filtration sewage draining pipe 53; the first water inlet valve 54 and the first water outlet valve 55 are opened by the sewage delivered from the booster pump 51, and the sand filter removes particulate matter from the sewage after the first bypass valve 58 and the sand filtration blowdown valve 52 are kept closed. The first water inlet valve, the first water outlet valve, the sand filter bypass valve and the sand filter blow-off valve are all electromagnetic valves, and automatic operation and back flushing of the sand filter are achieved through electric signal transmission. The sand filter is made of Q235, 304 stainless steel, 316 stainless steel or FRP. The particle size of the quartz sand filled in the sand filter is 0.5-3.0 mm.

The scale inhibitor adding device comprises a scale inhibitor tank 9, a chemical feeding pipe 91 is arranged at the outlet of the scale inhibitor tank 9, the chemical feeding pipe 91 is connected with the inlet of a chemical feeding pump 92, the outlet of the chemical feeding pump 92 is connected with the water inlet 62 of the core filter, scale inhibitor solution in the scale inhibitor tank is combined with the water outlet of the sand filter through the chemical feeding pump and enters the core filter, the core filter can further remove suspended matters in sewage, and the scale inhibitor can be added to prevent various insoluble sulfates and silicates from scaling in the membrane component due to high-power concentration, so that the service life of the core filter is effectively prolonged. Wherein, install the fifth level gauge 93 in the antisludging agent jar, when the liquid level was too low, automatic control closed dosing pump 92, prevented that the pump from inhaling futilely and leading to the damage, control system reminds to supply antisludging agent solution simultaneously. The second water inlet valve is an electromagnetic valve. The scale inhibitor tank is made of PE or PP; the dosing pump is a diaphragm metering pump, and the material of a pump head of the dosing pump is PP, PTFE or PVDF; the filter precision of the core type filter is 6-15 mu m.

A primary water inlet valve 71, a first pressure switch 72, a primary high-pressure pump 73 and a primary shock absorber 74 are sequentially arranged between the water outlet 63 of the core type filter and the water inlet of the primary high-pressure reverse osmosis membrane 7, and a primary water outlet valve 712, a third pressure switch 81, a secondary high-pressure pump 82 and a secondary shock absorber 83 are sequentially arranged between the clear water outlet of the primary high-pressure reverse osmosis membrane 7 and the water inlet of the secondary high-pressure reverse osmosis membrane 8; a first-stage concentrated water pressure regulating valve 75, a second pressure switch 76 and a pressure regulating valve 77 are sequentially arranged between the concentrated water outlet of the first-stage high-pressure reverse osmosis membrane 7 and the concentrated water storage tank 78; the water inlet of the second bypass pipeline is arranged between the water outlet 63 of the core filter and the first-stage water inlet valve 71, the water outlet of the second bypass pipeline is arranged between the third pressure switch 81 and the first-stage water outlet valve 712, and a second bypass valve 89 is arranged on the second bypass pipeline; the device also comprises a primary concentrated water circulation pipeline, wherein a water inlet of the primary concentrated water circulation pipeline is arranged between the second pressure switch 76 and the pressure regulating valve 77, a water outlet of the concentrated water circulation pipeline is arranged between the primary water inlet valve 71 and the first pressure switch 72, and a primary circulation pressure regulating valve 79 is arranged on the concentrated water circulation pipeline.

The effluent of the core filter enters a primary high-pressure pump for pressurization, a primary damper absorbs pressure pulses generated by the high-pressure pump to provide stable pressure for a membrane column, and sewage is subjected to high-pressure filtration and purification in a primary high-pressure reverse osmosis membrane; the intercepted membrane concentrated water enters the membrane column again for high-pressure filtration under the pressurization of the primary concentrated water pressure regulating valve 75 and the primary circulating valve 79, so that the higher membrane surface filtration flow rate is ensured, and the pollution inside the membrane column is slowed down. The primary concentrate pressure regulating valve 75 controls the discharge amount of concentrate by pressure regulation, and ensures the pure water recovery rate of the membrane. The sewage treatment device is characterized by further comprising a first-stage concentrated water return pipeline, wherein a water inlet of the first-stage concentrated water return pipeline is arranged between the second pressure switch 76 and the pressure regulating valve 77, a water outlet of the first-stage concentrated water return pipeline is connected with the third sewage return port 36 of the sewage tank, a first-stage concentrated water return valve 710 is arranged on the concentrated water return pipeline, the first-stage concentrated water return valve is kept closed, the pressure regulating valve is opened, and residual concentrated water is discharged into the concentrated water storage tank 78. Still include one-level water circulation pipeline, one-level water circulation pipeline's water inlet with one-level high pressure reverse osmosis membrane's clear water export links to each other, one-level water circulation pipeline's delivery port with the third sewage backward flow mouth of sewage jar links to each other, be provided with one-level water circulation valve 711 on the one-level water circulation pipeline, one-level high pressure reverse osmosis membrane 7's clear water is keeping that one-level water circulation valve closes and one-level outlet valve 712 opens down, gets into second grade high pressure reverse osmosis membrane.

When the pressure of the first pressure switch is lower than 0.5bar, the primary high-pressure pump cannot be started, so that the pump body is prevented from being damaged due to cavitation of the pump caused by insufficient water supply; when the pressure of the second pressure switch exceeds 6bar or the pressure of the third pressure switch exceeds 3bar, the whole system is automatically closed so as to protect the high-pressure reverse osmosis membrane assembly from being damaged. The first-stage bypass valve 89, the first-stage water inlet valve 71, the pressure regulating valve 77, the first-stage concentrated water return valve 710, the first-stage water outlet circulating valve 711 and the first-stage water outlet valve 712 are all electromagnetic valves. The first-stage high-pressure pump is a high-pressure plunger pump, and the pressure of the high-pressure plunger pump is 50-75 bar. The primary shock absorber is a pulse damper and is made of PVDF, 304 and 316L or carbon steel (inner lining ECTFE). The first-stage high-pressure reverse osmosis membrane is a disc tube type reverse osmosis membrane, and the filtering pressure of the first-stage high-pressure reverse osmosis membrane is 40-75 bar. The primary concentrated water pressure regulating valve 75 and the primary circulating pressure regulating valve 79 are electric pressure regulating valves.

The effluent filtered by the first-stage high-pressure reverse osmosis membrane enters a second-stage high-pressure pump, and under the action of a second-stage damper, stable filtering pressure is provided for the second-stage high-pressure reverse osmosis membrane. A second-stage concentrated water pressure regulating valve 84 and a fourth pressure switch 85 are sequentially arranged between the concentrated water outlet of the second-stage high-pressure reverse osmosis membrane and the first sewage inlet of the sewage tank; the sewage treatment device further comprises a secondary water outlet circulation pipeline, a water inlet of the secondary water outlet circulation pipeline is connected with a clean water outlet of the secondary high-pressure reverse osmosis membrane, a water outlet of the secondary water outlet circulation pipeline is connected with a third sewage backflow port of the sewage tank, and a secondary water outlet backflow valve 88 is arranged on the secondary water outlet circulation pipeline. The secondary concentrated water pressure regulating valve controls the discharge amount of concentrated water through pressure regulation, and simultaneously ensures the pure water recovery rate of the membrane. Keeping the second-stage effluent reflux valve closed, opening the discharge valve 86, and discharging the effluent after membrane high-pressure filtration to reach the standard.

When the pressure of the third pressure switch is lower than 0.5bar, the secondary high-pressure pump cannot be started, so that the pump body is prevented from being damaged due to the fact that the pump is not supplied with water enough and cavitation phenomenon occurs. When the pressure of the fourth pressure switch exceeds 6bar or the pressure of the fifth pressure switch exceeds 3bar, the whole system is automatically closed so as to protect the high-pressure reverse osmosis membrane assembly from being damaged. The second-stage high-pressure pump is a high-pressure plunger pump, and the pressure of the second-stage high-pressure pump is 35-55 bar; the secondary shock absorber is a pulse damper and is made of PVDF, 304 and 316L or carbon steel (inner lining ECTFE); the secondary high-pressure reverse osmosis membrane is a disc tube type reverse osmosis membrane, and the filtering pressure of the secondary high-pressure reverse osmosis membrane is 35-55 bar; the discharge valve and the secondary water outlet reflux valve are electromagnetic valves, and the secondary concentrated water pressure regulating valve is an electric pressure regulating valve.

The PLC control system is in electric signal connection with the electric control components. And each valve is in a normally closed state, and the PLC control system controls the valves to be opened and closed according to corresponding signals.

When the sewage treatment system of the semi-buried type rural garbage compression station operates for a certain time, the sewage treatment system needs to be maintained and cleaned regularly so as to prolong the service life of the system.

1) Backwashing of the sand filter: in the operation process of the system device, when the pressure difference between the first pressure sensor and the second pressure sensor exceeds 2.5bar or the operation time exceeds 100 hours, the back washing program is automatically executed: and closing the first water inlet valve, the first water outlet valve, the first-stage high-pressure pump and the second-stage high-pressure pump, opening the first bypass valve and the sand filtration blow-down valve, enabling sewage to reversely flow to perform backwashing on the sand filter, wherein the backwashing time is 5-10 min, and finally enabling the cleaning sewage to flow into the sewage collection tank through the sand filtration blow-down valve.

2) Daily clean water cleaning of the system device: after the system device is shut down after operation is finished every day, in order to prevent pollutants in the sewage from depositing on the surface of the membrane, clear water washing is needed, and the clear water washing procedure is as follows: inputting clean water into the sewage tank through a tap water supply pipe, then opening a first water inlet valve, a first water outlet valve, a second water inlet valve, a first-stage concentrated water pressure regulating valve, a first-stage water outlet valve, a second-stage concentrated water pressure regulating valve and a discharge valve, starting a booster pump, a first-stage high-pressure pump and a second-stage high-pressure pump in sequence, enabling the cleaning concentrated water of the first-stage high-pressure reverse osmosis membrane to enter a concentrated water storage tank, enabling the cleaning concentrated water of the second-stage high-pressure reverse osmosis membrane to flow back to the sewage tank, and discharging the. The daily clean water cleaning time of the system device is 3-6 min.

3) Periodic chemical cleaning of system devices: the membrane pollution is divided into organic matter pollution and inorganic matter pollution, and the organic matter pollution needs to adopt an alkaline cleaning agent, wherein the pH value of the alkaline cleaning agent is 10-11, the temperature is 35-38 ℃, the concentration is 3 per mill-1%, and the alkaline cleaning agent is used for washing off fat, humic acid, colloid and the like attached to the membrane surface; and the inorganic pollution needs to adopt an acidic cleaning agent, wherein the pH of the acidic cleaning agent is 2.5-3.5, the temperature is 35-38 ℃, the concentration is 3 per mill-1%, and the acidic cleaning agent is used for washing and removing calcium carbonate, ferric salt, inorganic colloid, sulfate and other insoluble inorganic salts deposited on the membrane surface. The first-stage high-pressure reverse osmosis membrane is high in water inlet pollutant concentration, the chemical cleaning period is short, alkaline cleaning is generally carried out for 8-10 days, and acid cleaning is carried out for 10-15 days, while the second-stage high-pressure reverse osmosis membrane is low in water inlet pollutant concentration, so that the chemical cleaning period is long, alkaline cleaning is generally carried out for 15-20 days, and acid cleaning is carried out for 20-40 days; the chemical cleaning time is 45-90 min. The chemical cleaning is divided into the chemical cleaning of a first-stage high-pressure reverse osmosis membrane and the chemical cleaning of a second-stage high-pressure reverse osmosis membrane, and the cleaning steps are respectively as follows:

① chemical cleaning step of the first-stage high-pressure reverse osmosis membrane, which is to pour the prepared cleaning agent into a sewage tank, open a sewage backflow valve, a first bypass valve, a second water inlet valve, a first-stage concentrated water pressure regulating valve, a first-stage circulating pressure regulating valve, a first-stage concentrated water backflow valve and a first-stage water outlet circulating valve, sequentially start a booster pump and a first-stage high-pressure pump, and make the cleaning concentrated water and the discharge water of the first-stage high-pressure reverse osmosis membrane flow back into the sewage tank, thereby performing the internal circulating cleaning process of the system.

② chemical cleaning step of the second-stage high-pressure reverse osmosis membrane, which comprises pouring the prepared cleaning agent into a sewage tank, opening a sewage return valve, a first bypass valve, a second water inlet valve, a second bypass valve, a second concentrated water pressure regulating valve and a second water outlet return valve, starting the booster pump and the second-stage high-pressure pump in sequence, and returning the cleaning concentrated water and the discharge water of the second-stage high-pressure reverse osmosis membrane into the sewage tank, thereby performing the internal circulation cleaning process of the system.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a bury formula villages and towns rubbish compression station sewage treatment system partly which characterized in that includes:

2. The sewage treatment system of the semi-buried type rural garbage compression station as claimed in claim 1, wherein a guide cylinder is arranged in the anaerobic baffle reactor close to the sewage collection tank, the guide cylinder is of a structure with a closed top end and an open bottom end, a guide pipe is arranged on one side of the guide cylinder, the guide pipe comprises a horizontal pipe communicated with the sewage inlet and a vertical pipe communicated with the horizontal pipe, and the vertical pipe is located in the middle of the guide cylinder.

3. The sewage treatment system of the semi-buried type rural garbage compression station as claimed in claim 2, wherein a connecting rib is arranged at the bottom end of the guide cylinder, and an inclined reflection plate is arranged at the lower part of the connecting rib.

4. The semi-buried rural garbage compression station sewage treatment system of claim 3, wherein the angle between the inclined reflection plate and the horizontal plane is 17 °.

5. The sewage treatment system of the semi-buried type rural garbage compression station as claimed in claim 1, wherein a booster pump, a first water inlet valve and a first pressure sensor are sequentially arranged between the water outlet of the sewage tank and the water inlet of the sand filter, and a second pressure sensor, a first water outlet valve and a second water inlet valve are sequentially arranged between the water outlet of the sand filter and the water inlet of the core filter; still include first bypass line, the water inlet setting of first bypass line is in the booster pump with between the first water intaking valve, the delivery port setting of first bypass line is in first outlet valve with between the second water intaking valve, be provided with first bypass valve on the first bypass line.

6. The sewage treatment system of the semi-buried type rural garbage compression station as claimed in claim 5, further comprising an acid adding device and a return line, wherein the acid adding device comprises an acid storage tank, an acid adding pipe is arranged at an outlet of the acid storage tank, the acid adding pipe is connected with an inlet of an acid adding pump, an outlet of the acid adding pump is connected with an acid injection port of the sewage tank, a water inlet of the return line is located between the booster pump and the first water inlet valve, a water outlet of the return line is connected with a second sewage return port of the sewage tank, and a sewage return valve is arranged on the return line.

7. The semi-buried rural garbage compression station sewage treatment system of claim 5, further comprising a scale inhibitor adding device, wherein the scale inhibitor adding device comprises a scale inhibitor tank, a dosing pipe is arranged at an outlet of the scale inhibitor tank, the dosing pipe is connected with an inlet of a dosing pump, and an outlet of the dosing pump is connected with a water inlet of the core filter.

8. The sewage treatment system of the semi-buried type rural garbage compression station as claimed in claim 1, wherein a primary water inlet valve, a first pressure switch, a primary high-pressure pump and a primary shock absorber are sequentially arranged between the water outlet of the core filter and the water inlet of the primary high-pressure reverse osmosis membrane, and a primary water outlet valve, a third pressure switch, a secondary high-pressure pump and a secondary shock absorber are sequentially arranged between the clear water outlet of the primary high-pressure reverse osmosis membrane and the water inlet of the secondary high-pressure reverse osmosis membrane; a first-stage concentrated water pressure regulating valve, a second pressure switch and a pressure regulating valve are sequentially arranged between the concentrated water outlet of the first-stage high-pressure reverse osmosis membrane and the concentrated water storage tank; the water inlet of the second bypass pipeline is arranged between the water outlet of the core type filter and the first-stage water inlet valve, the water outlet of the second bypass pipeline is arranged between the third pressure switch and the first-stage water outlet valve, and a second bypass valve is arranged on the second bypass pipeline.

9. The sewage treatment system of the semi-buried type rural garbage compression station as claimed in claim 8, further comprising a primary concentrated water circulation pipeline, wherein a water inlet of the primary concentrated water circulation pipeline is arranged between the second pressure switch and the pressure regulating valve, a water outlet of the concentrated water circulation pipeline is arranged between the primary water inlet valve and the first pressure switch, and a primary circulation pressure regulating valve is arranged on the concentrated water circulation pipeline.

10. The sewage treatment system of the semi-buried type rural garbage compression station as claimed in claim 8, further comprising a primary concentrated water return pipeline, wherein a water inlet of the primary concentrated water return pipeline is arranged between the second pressure switch and the pressure regulating valve, a water outlet of the primary concentrated water return pipeline is connected with a third sewage return port of the sewage tank, and a primary concentrated water return valve is arranged on the concentrated water return pipeline.