CN114735899B

CN114735899B - A sewage pretreatment systems for river drain

Info

Publication number: CN114735899B
Application number: CN202210476753.4A
Authority: CN
Inventors: 裴逸飞
Original assignee: Taiyuan Qunxin Technology Co ltd
Current assignee: Taiyuan Qunxin Technology Co ltd
Priority date: 2022-04-30
Filing date: 2022-04-30
Publication date: 2023-04-18
Anticipated expiration: 2042-04-30
Also published as: CN114735899A

Abstract

The invention discloses a sewage pretreatment system for a river drain, which comprises a river wastewater drain, a wastewater suspended matter filtering tank, a translation type garbage filtering basket, a nitrogen aeration and oxygen reduction tank, a high-content cotton hull cellulose filtering tank, an organic matter wastewater tank, a bidirectional circulation organic matter purification device and a methane treatment and collection device. The invention belongs to the technical field of sewage purification, and particularly relates to a sewage pretreatment system for a drain outlet of a river channel; according to the invention, the cotton hull cellulose purified by the agricultural and forestry biomass material is used for removing the heavy metal ions in the industrial wastewater in an adsorptive manner, so that the problem that the discharge of sewage containing toxic heavy metal ions pollutes the ecological environment of a river channel is solved; the bidirectional circulating organic matter purifying device is developed based on the principle that anaerobic bacteria decompose organic matters to generate pressure, so that automatic circulating degradation of sewage is realized.

Description

Sewage pretreatment system for river drain

Technical Field

The invention belongs to the technical field of sewage purification, and particularly relates to a sewage pretreatment system for a drain outlet of a river channel.

Background

The treatment of toxic heavy metals in industrial waste water is an important component of river pollution discharge treatment, and is characterized by that the heavy metal ions in the industrial waste water including copper, lead and chromium can be eliminated, and according to the pollutant components contained in the waste water can be divided into acid waste water, alkaline waste water, phenol-containing waste water, chromium-containing waste water, organic phosphorus-containing waste water and radioactive waste water, etc ⁶⁺ ) And trivalent chromium ion (Cr) ³⁺ ) Two forms appear, wherein the toxicity of the hexavalent chromium ion is stronger than that of the trivalent chromium ion by tens of times.

The existing sewage pretreatment system of the drain outlet of the river has the following defects that (1) the existing sewage pretreatment system has a complex structure, adopts a plurality of reaction vessels which are connected in series, occupies a larger field and can not meet the sewage purification requirement of the drain outlet of the river; (2) In the organic matter degradation stage, sewage in the existing device only flows through anaerobic bacteria sludge particles once, and the circular purification of the sewage cannot be realized.

Disclosure of Invention

Aiming at the situation and overcoming the defects of the prior art, the invention provides a sewage pretreatment system for a river drain, aiming at the problems that the existing river drain sewage pretreatment system is complex in structure, occupies a larger field and cannot meet the sewage purification requirement of the river drain, the scheme creatively develops a multi-layer sewage dispersion cone, and the sewage can uniformly and fully contact anaerobic bacteria in an anaerobic bacteria sludge tank through a designed sewage layered flow path from bottom to top, so that the preliminary purification of the sewage is realized, the problem that the river drain field is smaller and the existing sewage pretreatment system occupies a larger area is solved effectively;

meanwhile, aiming at the problems that the existing sewage treatment device only flows through anaerobic bacteria sludge particles once, the sewage purification efficiency is low, and the sewage cannot be circularly purified, in the organic matter degradation stage, the scheme adopts a gas-liquid separation circulating device which is researched and developed, and under the condition of no intervention of pumping equipment, and by applying a gas pressure principle (based on that the bottom sewage is sucked into a liquid suction cavity when the pressure intensity is increased, and the sewage is squeezed into a circulating water outlet pipe when the pressure intensity is reduced), the sewage flowing into a multi-layer sewage dispersion cone is automatically circularly purified;

the invention provides a sewage pretreatment system for a river drain, which has high sewage purification efficiency and low energy consumption and can recycle methane.

The technical scheme adopted by the invention is as follows: the invention provides a sewage pretreatment system for a river drain, which comprises a river wastewater drain, a wastewater suspended matter filtering tank, a translation type garbage filtering basket, a nitrogen-aeration and oxygen-reduction tank, a high-content cotton hull cellulose filtering tank, an organic matter wastewater tank, a bidirectional circulation organic matter purifying device and a methane treatment and collection device, wherein the wastewater suspended matter filtering tank is fixedly arranged on one side of the river wastewater drain, the wastewater suspended matter filtering tank is used for filtering suspended matters in wastewater, the translation type garbage filtering basket is fixedly arranged on one side, close to the river wastewater drain, of the side wall of the wastewater suspended matter filtering tank and is arranged below the river wastewater drain, the translation type garbage filtering basket is used for filtering floating garbage such as plastic bags, foams, branches and the like in the wastewater, the nitrogen-aeration and oxygen-reduction tank is fixedly arranged on one side of the wastewater filtering tank and is arranged on one side far away from the river wastewater drain, the nitrogen aeration and oxygen reduction tank is used for filling pure nitrogen into the wastewater to reduce the oxygen dissolution amount in the wastewater and create an anaerobic environment, the high-content cotton hull cellulose filter tank is fixedly arranged on one side of the nitrogen aeration and oxygen reduction tank and is arranged on one side far away from a wastewater discharge outlet of a river channel, the high-content cotton hull cellulose filter tank is used for adsorbing heavy metal chromium ions, copper ions, lead ions and the like in industrial wastewater, the organic matter wastewater tank is fixedly arranged on one side of the high-content cotton hull cellulose filter tank and is arranged on one side far away from the wastewater discharge outlet of the river channel, the oxygen content in the organic matter wastewater tank is very small and is suitable for the existence of anaerobic bacteria, the bidirectional circulation organic matter purification device is fixedly arranged on one side of the organic matter wastewater tank, the bidirectional circulation organic matter purification device contains anaerobic bacteria, the anaerobic bacteria are used for decomposing organic matters in the wastewater and generate sulfide precipitation for trivalent chromium through the reduction six price of a byproduct hydrogen sulfide of the anaerobic bacteria, the biogas treatment and collection device is fixedly arranged on one side of the purification device containing the bidirectional circulating organic matter and is used for desulfurizing, collecting and storing biogas.

Preferably, the high-content cotton hull cellulose filter tank comprises a cotton hull cellulose filter tank bottom plate, a porous side wall of the cotton hull cellulose filter tank and a carbonized surface high-content cotton hull cellulose filter layer, the cotton hull cellulose filter tank bottom plate is fixedly arranged between the nitrogen exposure and oxygen reduction tank and the organic matter wastewater tank, the porous side wall of the cotton hull cellulose filter tank is fixedly arranged on the upper wall of the cotton hull cellulose filter tank bottom plate, and the carbonized surface high-content cotton hull cellulose filter layer is fixedly arranged in the middle of the porous side wall of the cotton hull cellulose filter tank.

Preferably, two-way circulation organic matter purifier includes individual layer sewage treatment bucket, multilayer sewage dispersion awl and gas-liquid separation circulating device, individual layer sewage treatment bucket is fixed and is located organic matter wastewater disposal basin one side, and individual layer sewage treatment bucket is used for holding that contains organic matter sewage, multilayer sewage dispersion awl is fixed to be located in the individual layer sewage treatment bucket and locate individual layer sewage treatment barrel head portion upper wall, and multilayer sewage dispersion awl is used for handling the sewage that contains organic matter, gas-liquid separation circulating device is fixed to be located individual layer sewage treatment bucket top, and gas-liquid separation circulating device is used for the separation of marsh gas and sewage.

Preferably, translation formula rubbish filters basket includes the rotatory handle unable adjustment base of area bearing, the rotatory handle of long screw rod, rubbish filters basket slip cantilever, built-in screw thread cavity precession pole, tip cantilever pulley, rubbish filters basket body, rubbish filters basket rings and cantilever pulley bearing rope, the rotatory handle unable adjustment base of area bearing is fixed to be located waste water suspended solid filtering ponds lateral wall top, the rotatory handle of long screw rod rotates to be located on the rotatory handle unable adjustment base of area bearing, rubbish filters basket slip cantilever slides and locates waste water suspended solid filtering ponds lateral wall top, rubbish filters basket slip cantilever and has slip and bearing function, built-in screw thread cavity precession pole is fixed to be located rubbish filters basket slip cantilever bottom lateral wall, tip cantilever pulley rotates to be located on rubbish filters basket slip cantilever, rubbish filters basket body activity and locates under rubbish filtering baskets slip cantilever, rubbish filtering basket body bottom design has the mesh to be used for the waterlogging caused by excessive rainfall, rubbish filters basket body upper portion is located to rubbish filtering baskets body ring fixedly to rubbish filtering baskets, cantilever pulley bearing rope is fixed to be located on the cantilever pulley.

Preferably, the nitrogen exposure and oxygen reduction tank comprises an oxygen reduction tank body base, an oxygen reduction tank body side wall, a solar cell panel, an electricity storage power supply, a time controller, a nitrogen purification device and an intermittent nitrogen injection device, wherein the oxygen reduction tank body base is fixedly arranged between a wastewater suspended matter filtering tank and a high-content cotton hull cellulose filtering tank, the oxygen reduction tank body side wall is fixedly arranged on the upper wall of the oxygen reduction tank body base, the solar cell panel is fixedly arranged on one side of the oxygen reduction tank body base, the electricity storage power supply is fixedly arranged on one side of the solar cell panel, the solar cell panel is electrically connected with the electricity storage power supply, the time controller is fixedly arranged on the solar cell panel, the time controller is electrically connected with the electricity storage power supply, the nitrogen purification device is fixedly arranged on one side of the oxygen reduction tank body side wall, the nitrogen purification device is used for separating and manufacturing pure nitrogen in the air from other gases, the intermittent nitrogen injection device penetrates through the oxygen reduction tank body side wall and is fixedly arranged on the oxygen reduction tank body base, and the intermittent nitrogen injection device is used for intermittently injecting the pure nitrogen into the sewage of the nitrogen in the nitrogen reduction tank.

Further, nitrogen gas purification device includes air compressor, nitrogen gas overhead tank, nitrogen gas intake pipe and polyimide hollow fiber gas separation mechanism, air compressor is fixed to be located high content cotton hull cellulose filtering ponds one side, and air compressor and time controller electrical property link to each other, nitrogen gas overhead tank is fixed to be located and exposes to the sun and subtract oxygen pond one side, nitrogen gas intake pipe one end link up fixedly to be located on the nitrogen gas overhead tank, and the nitrogen gas intake pipe is used for filling into pure nitrogen gas in the nitrogen gas overhead tank, polyimide hollow fiber gas separation mechanism is fixed to be located between air compressor and the nitrogen gas intake pipe, and air compressor is with air indentation polyimide hollow fiber gas separation mechanism, and polyimide hollow fiber gas separation mechanism is arranged in nitrogen gas and the oxygen of separation air.

Wherein, polyimide hollow fiber gas separation mechanism includes gas separation mechanism outer tube, all the other gas separation mouths and polyimide hollow fiber gas separation membrane, gas separation mechanism outer tube is fixed to be located between air compressor and the nitrogen gas intake pipe, all the other gas separation mouths are located on the gas separation mechanism outer tube, and all the other gas separation mouths are used for the gas separation except for the nitrogen gas, polyimide hollow fiber gas separation membrane is fixed to be located in the gas separation mechanism outer tube, and polyimide hollow fiber gas separation membrane is arranged in with the nitrogen gas and the oxygen separation in the air.

Further, intermittent type formula nitrogen gas injection apparatus includes nitrogen outlet duct and the underwater nitrogen gas nozzle of densely covered formula, nitrogen outlet duct one end and nitrogen pressure tank fixed connection, nitrogen outlet duct body part runs through the fixed oxygen reduction pond body lateral wall and locates oxygen reduction pond body base upper wall, the fixed nitrogen gas nozzle of densely covered formula is located on the nitrogen outlet duct under water, the nitrogen gas nozzle of densely covered formula under water is used for spraying pure nitrogen gas to waste water in, the opening of time controller control air compressor stops, pump into the air to polyimide hollow fiber gas separating mechanism when air compressor starts, polyimide hollow fiber gas separating mechanism advances the nitrogen gas overhead tank with the nitrogen gas of separating through nitrogen gas inlet pipe transmission, nitrogen gas overhead tank pressure increases, begin to release nitrogen gas when reaching the design pressure value, nitrogen gas sprays into waste water through the submerged nitrogen gas nozzle of densely covered formula, nitrogen gas overhead tank release stops when air compressor stops nitrogen gas pressure reaches below the design value and releases nitrogen gas, thereby reach the purpose that intermittent type sprayed nitrogen gas.

Further preferably, the multilayer sewage dispersion cone comprises a micro submersible pump, a sewage inflow pipe, an external sludge tank top perforated cone, an upper cone supporting block, an upper top perforated cone, a sludge particle feeding pipe and internal anaerobic bacteria sludge particles, the micro submersible pump is fixedly arranged on the side wall of the interior of the organic matter wastewater pool far away from the wastewater discharge outlet of the river channel, the micro submersible pump is electrically connected with the electricity storage power supply, one end of the sewage inflow pipe penetrates through the side wall of the organic matter wastewater tank and is fixedly arranged on the micro submersible pump, the top perforated cone of the peripheral sludge tank is fixedly arranged on the upper wall inside the single-layer sewage treatment barrel, the other end of the sewage inflow pipe penetrates through the single-layer sewage treatment barrel and is fixedly arranged on the top perforated cone of the peripheral sludge tank, the sewage inflow pipe extends into the top perforated cone of the peripheral sludge tank, the micro submersible pump conveys the wastewater containing organic matters into the top perforated cone of the peripheral sludge tank through the sewage inflow pipe, the micro submersible pump pumps the wastewater into the top perforated cone of the peripheral sludge tank, and the wastewater is uniformly dispersed in the top perforated cone of the peripheral sludge tank, the upper layer of cone supporting block is fixedly arranged on the upper wall in the single-layer sewage treatment barrel, the upper layer of top tapping cone is fixedly arranged on the upper layer of cone supporting block, water flows upwards through the top small hole of the upper layer of top tapping cone, a gap is formed between the upper layer of top tapping cone and the bottom of the single-layer sewage treatment barrel, the sludge particle throwing pipe is fixedly arranged on the upper part of the upper layer top perforated cone and is used for throwing sludge particles, the anaerobic bacteria internally attached with the anaerobic bacteria sludge particles are arranged between the upper layer top tapping cone and the external sludge tank top tapping cone, and the anaerobic bacteria internally attached with the anaerobic bacteria sludge particles comprise methanogenic bacillus, methanogenic coccus, methanogenic sarcina, methanogenic hyphomycete, desulfurization vibrio sulfate reducing bacteria and the like.

Further, the biogas processing and collecting device comprises a biogas purifier, a biogas collecting tank, a biogas inlet pipe I, a biogas inlet pipe II, a one-way gas guide valve and a pressure release valve, wherein the biogas purifier is fixedly arranged on one side of the single-layer sewage treatment barrel, the biogas purifier is used for desulfurizing and purifying biogas in the gas-liquid separation and circulation device, the biogas collecting tank is fixedly arranged on one side of the biogas purifier far away from the gas-liquid separation and circulation device, the biogas collecting tank is used for collecting desulfurized pure biogas as an energy source, the biogas inlet pipe I is fixedly arranged between the gas-liquid separation and circulation device and the biogas purifier, the biogas inlet pipe II is fixedly arranged between the biogas purifier and the biogas collecting tank, and the pressure release valve is fixedly arranged on the biogas inlet pipe I.

Further preferably, peripheral hardware sludge impoundment top trompil awl includes lower floor's top trompil awl body, lower floor's top trompil awl top aperture and anaerobe sludge impoundment, lower floor's top trompil awl body is fixed locate in the individual layer sewage treatment bucket and locate the bottom upper wall, lower floor's top trompil awl top aperture is located lower floor's top trompil awl body upper portion, anaerobe sludge impoundment is fixed to be located on the outside lateral wall of lower floor's top trompil awl body.

Further preferably, the gas-liquid separation circulating device comprises an external sliding limiting barrel, an internal sliding limiting barrel, a circulating water inlet pipe, a circulating water outlet pipe, a circulating spray head, a gas overflow pipe, a liquid one-way suction valve, a liquid one-way outflow valve, a biogas compression cavity, a liquid suction cavity, a lower connecting spring gas compression sliding part, a suction cavity built-in spring, a clear water outlet and a magnetic float type side-mounted float ball liquid level switch, wherein the external sliding limiting barrel is fixedly arranged above the single-layer sewage treatment barrel, the internal sliding limiting barrel is fixedly arranged inside the external sliding limiting barrel, the circulating water inlet pipe is fixedly arranged on the external sliding limiting barrel, the circulating water inlet pipe extends into the internal sliding limiting barrel from the bottom, the circulating water inlet pipe is communicated with the internal sliding limiting barrel, the circulating water outlet pipe is fixedly arranged on the internal sliding limiting barrel, the circulating water outlet pipe extends into the internal sliding limiting barrel from the side wall, the circulating water outlet pipe is communicated with the internal sliding limiting barrel, the circulating spray head is fixedly arranged at one end of the circulating water outlet pipe far away from the external sliding limiting barrel, the gas overflow pipe is fixedly arranged at the bottom of the external sliding limiting barrel, the liquid overflow pipe is fixedly arranged at one end of the internal sliding limiting barrel, the liquid suction pipe is arranged at one end of the internal sliding limiting barrel, the lower sliding limiting barrel, the internal sliding limiting barrel is fixedly arranged at the lower end of the internal sliding limiting barrel, the clear water discharge port is fixedly arranged on the side wall above the sewage treatment barrel, the magnetic floater type side-mounted floating ball liquid level switch is fixedly arranged on the inner wall of the clear water discharge port, when the liquid level rises to a designed value, the magnetic floater type side-mounted floating ball liquid level switch is opened, clear water on the upper layer of the single-layer sewage treatment barrel is discharged from the clear water discharge port, and when the liquid level falls to the clear water discharge port, the magnetic floater type side-mounted floating ball liquid level switch is closed, and the liquid level begins to rise.

The invention with the structure has the following beneficial effects:

(1) The scheme provides a sewage pretreatment system for river drain, multilayer sewage dispersion awl structure has been designed, make sewage flow from the vertical layering that makes progress down, the rivers impact of flow is structural at the toper of slope, the evenly distributed of organic matter in the water body has been realized, rivers flow to upper strata top trompil awl from lower floor top trompil awl top aperture, because the cone structure of upper strata top trompil awl, rivers slope downward flow, make inside attached anaerobe mud granule of anaerobe sludge inslot contact rivers uniformly, sewage is behind the anaerobe sludge groove of evenly spreading bottom floor top trompil awl body outside side, the preliminary purification of sewage has been realized.

(2) The scheme provides a sewage pretreatment system for a river drain outlet, and a gas-liquid separation circulating device is designed, when gas generated by decomposing organic matters by anaerobic bacteria causes the pressure increase in a single-layer sewage treatment barrel, the pressure increase pushes a lower spring gas compression sliding part to slide, the lower spring gas compression sliding part upwards stretches a suction cavity built-in spring when sliding, so that sewage is sucked into a liquid suction cavity, when a pressure relief switch is opened, the pressure in a methane compression cavity is reduced, the suction cavity built-in spring contracts, the lower spring gas compression sliding part presses the sewage into a circulating water outlet pipe, the sewage continuously flows into a continuous flow such as a multi-layer sewage dispersion cone from a circulating nozzle, the height of the circulating nozzle is designed above a clear water outlet pipe, the sewage is conveniently discharged from the circulating nozzle after entering from a circulating water inlet pipe, the water inlet of the circulating water inlet pipe is designed at the bottom of the single-layer sewage treatment barrel, the sewage is conveniently drawn from the bottom, the circulating nozzle is designed in a sludge particle feeding pipe, the sewage is conveniently flows into the multi-layer sewage dispersion cone from the sludge particle feeding pipe, external power input is not required in the process, the circulating purification of the sewage is realized, and the problem that the organic matters in the short contact time of the anaerobic bacteria and the organic matters in the water is not degraded completely is solved.

(3) The scheme provides a sewage pretreatment system for a river drain outlet, the filtration of toxic heavy metal ions which are difficult to dissolve in water in sewage is realized by designing a carbonized surface high-content cotton shell cellulose filter layer, the toxic heavy metal ions are retained in a high-content cotton shell cellulose filter tank, the high-content cotton shell cellulose is applied by the method, functional groups such as hydroxyl groups in the cellulose have rich adsorption pore sizes, the filter layer is low in cost, green and pollution-free biomass materials, especially heavy metal chromium ions, copper ions and lead ion adsorption are good, and the application of the carbonized surface high-content cotton shell cellulose filter layer realizes the non-toxic treatment of the toxic sewage.

(4) This scheme provides a sewage pretreatment systems for river drain, anaerobic environment has been built to nitrogen exposure and oxygen reduction pond, the principle of the accessory substance hydrogen sulfide reduction hexavalent chromium ion that application anaerobe decomposed the organic matter and produced, hexavalent chromium ion is reduced to trivalent chromium ion, and the toxicity of hexavalent chromium ion is nearly hundredfold of trivalent chromium ion toxicity, thereby turn into the hexavalent chromium ion in the sewage and sulphide the chromium deposit, it is inside organic matter purifier to sulphide the chromium deposit, the toxic substance content in the sewage has greatly been reduced, the water source has been protected.

(5) The scheme provides a sewage pretreatment systems for river drain, nitrogen purification device has been designed, application compressed air is injected into the hollow fiber separation membrane, oxygen molecule and other molecules that are less than the nitrogen molecule pass the separation membrane easily, oxygen is the same time outside the continuous play separation membrane, the interior nitrogen gas of hollow fiber alright reach the principle of ideal purity, direct compressed air obtains pure nitrogen gas at normal atmospheric temperature, this process application solar cell panel provides can the electric energy, it has accomplished green to need not to consume fossil energy.

(6) Compared with the traditional sewage treatment method, the sewage pretreatment system has the outstanding characteristics that a carbonized surface high-content cotton shell cellulose filter layer which is easily obtained by adopting materials is adopted, the cotton shell cellulose contains rich C-OH, C-C and C-H functional groups, and a structure formed by the C-OH, C-C and C-H functional groups has the characteristic of porosity, can adsorb heavy metal ions to form sulfide and hydroxide precipitates, and the recyclable biomass material has great market value.

(7) Compared with the existing method for treating heavy metal ions in the aspect of removing metal chromium ions, the method has the advantages that the vibrio sulfate reducing bacteria are added into anaerobic bacteria sludge particles, the vibrio sulfate reducing bacteria reduce sulfate radicals to generate an intermediate product hydrogen sulfide when organic matters pass through, the hydrogen sulfide can be used as a reducing agent to reduce hexavalent chromium ions, the hydrogen sulfide reduces the hexavalent chromium ions into trivalent chromium ions, the existing device can only filter the trivalent chromium ions which are insoluble in water, but can not filter the hexavalent chromium ions which are soluble in water.

The cellulose in the powder in the cotton hull of the agricultural and forestry biomass material is creatively purified to prepare a high-content cotton hull cellulose filter layer, the surface of the high-content cotton hull cellulose filter layer on the carbonized surface is carbonized, the cotton hull powder contains abundant cellulose, functional groups such as C-OH, C-C, C-H and the like in the cellulose have abundant adsorption pore diameters, and the cellulose has a good adsorption effect on heavy metal ions (chromium ions, copper ions and lead ions), the high-content cotton hull cellulose can remarkably improve the adsorption efficiency of the heavy metal ions in the wastewater, the adsorption efficiency on the heavy metal ions (chromium ions, copper ions and lead ions) in the industrial wastewater reaches more than 96%, and the carbonized cotton hull cellulose still has similar adsorption characteristics and can realize non-toxic treatment of the industrial wastewater; creatively uses the desulfurated vibrio sulfate reducing bacteria to reduce sulfate radicals into hydrogen sulfide in the presence of organic matters, and the hydrogen sulfide is used as a reducing agent to ensure that heavy metal hexavalent chromium ions (Cr) in the wastewater ⁶⁺ ) Reduced to trivalent chromium ions (Cr) ³⁺ ) Trivalent chromium ion (Cr) ³⁺ ) And the sulfate ions are combined and converted into sulfide for precipitation, so that the toxic industrial wastewater can be subjected to nontoxic treatment.

Drawings

Fig. 1 is a schematic diagram of an overall structure of a sewage pretreatment system for a drain outlet of a river provided by the invention;

FIG. 2 is a sectional view of a bidirectional circulation organic matter purification device of a sewage pretreatment system for a drain outlet of a river, according to the present invention;

fig. 3 is a schematic view of an installation position of a translational garbage filtering basket of a sewage pretreatment system for a drain outlet of a river provided by the invention;

fig. 4 is a schematic structural view of a translational garbage filtering basket of a sewage pretreatment system for a drain outlet of a river channel, provided by the invention;

fig. 5 is a schematic structural diagram of a nitrogen aeration and oxygen reduction tank of a sewage pretreatment system for a drain outlet of a river provided by the invention;

FIG. 6 is a schematic structural view of a polyimide hollow fiber gas separation mechanism of a sewage pretreatment system for a drain outlet of a river, provided by the invention;

fig. 7 is a schematic structural diagram of a nitrogen pressure tank of a sewage pretreatment system for a drain outlet of a river provided by the invention;

FIG. 8 is a partial enlarged view of portion A of FIG. 5;

fig. 9 is a sectional view of a multi-layer sewage dispersion cone structure of a sewage pretreatment system for a drain outlet of a river provided by the present invention;

FIG. 10 is a sectional view of a top opening cone structure of a sludge tank arranged outside a sewage pretreatment system for a drain outlet of a river channel, provided by the invention;

fig. 11 is a schematic view of the installation position of a biogas treatment and collection device of a sewage pretreatment system for a drain outlet of a river channel, provided by the invention;

FIG. 12 is a schematic view of a top opening cone structure of a sludge tank arranged outside a biogas processing and collecting device of a sewage pretreatment system for a drain outlet of a river channel, provided by the invention;

fig. 13 is a schematic structural view of a gas-liquid separation and circulation device of a sewage pretreatment system for a drain outlet of a river provided by the invention;

fig. 14 is a schematic view of the installation position of a liquid one-way suction valve of a sewage pretreatment system for a drain outlet of a river channel, provided by the invention;

FIG. 15 is a sectional view of a liquid one-way suction valve of a sewage pretreatment system for a drain outlet of a river according to the present invention;

fig. 16 is a schematic structural view of a liquid one-way outflow valve of the sewage pretreatment system for a drain outlet of a river channel, provided by the invention;

fig. 17 is a sectional view of an internal sliding limiting cylinder of the sewage pretreatment system for a drain outlet of a river channel, provided by the invention;

fig. 18 is a schematic diagram of the operation of an electrical device in a sewage pretreatment system for a drain outlet of a river channel, provided by the invention;

fig. 19 is a circuit diagram of a time controller of a sewage pretreatment system for a drain outlet of a river according to the present invention;

fig. 20 is a circuit diagram of a micro submersible pump of a sewage pretreatment system for a drain outlet of a river provided by the invention.

Wherein, 1, a river wastewater drain outlet, 2, a wastewater suspended matter filtering tank, 3, a translational garbage filtering basket, 4, a nitrogen aeration and oxygen reduction tank, 5, a high-content cotton hull cellulose filtering tank, 6, an organic matter wastewater tank, 7, a bidirectional circulation organic matter purifying device, 8, a methane treatment and collection device, 9, a cotton hull cellulose filtering tank bottom plate, 10, a cotton hull cellulose filtering tank porous side wall, 11, a carbonized surface high-content cotton hull cellulose filtering layer, 12, a single-layer sewage treatment barrel, 13, a multi-layer sewage dispersion cone, 14, a gas-liquid separation and circulation device, 15, a fixed base with a bearing rotating handle, 16, a long screw rod rotating handle, 17, a garbage filtering basket sliding cantilever, 18, a hollow screw-thread screwing rod with a built-in screw thread, 19, an end cantilever pulley, 20, a garbage filtering basket body, 21, a garbage filtering basket lifting ring, 22, a cantilever pulley bearing rope, 23, a base of the oxygen reduction tank body, 24, a side wall of the oxygen reduction tank body, 25, a solar cell panel, 26, an electricity storage power supply, 27, a time controller, 28, a nitrogen purification device, 29, an intermittent nitrogen injection device, 30, an air compressor, 31, a nitrogen pressure tank, 32, a nitrogen inlet pipe, 33, a polyimide hollow fiber gas separation mechanism, 34, an outer pipe of the gas separation mechanism, 35, other gas separation ports, 36, a polyimide hollow fiber gas separation membrane, 37, a nitrogen outlet pipe, 38, a densely distributed underwater nitrogen nozzle, 39, a miniature submersible pump, 40, a sewage inflow pipe, 41, an external opening cone at the top of a sludge tank, 42, an upper cone supporting block, 43, an upper opening cone, 44, a sludge particle feeding pipe, 45, internally attached anaerobic sludge particles, 46, a biogas purifier, 47, a biogas collection tank, 48 and a biogas inlet pipe I, 49. a second biogas inlet pipe, 50, a one-way air guide valve, 51, a pressure release valve, 52, a lower layer top opening cone body, 53, a lower layer top opening cone top small hole, 54, an anaerobic bacteria sludge groove, 55, an external sliding limiting cylinder, 56, an internal sliding limiting cylinder, 57, a circulating water inlet pipe, 58, a circulating water outlet pipe, 59, a circulating spray head, 60, a gas overflow pipe, 61, a liquid one-way suction valve, 62, a liquid one-way outflow valve, 63, a biogas compression cavity, 64, a liquid suction cavity, 65, a suction cavity built-in spring, 66, a lower connecting spring gas compression sliding part, 67, a clean water outlet, 68 and a magnetic float type side-mounted floating ball level switch.

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "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 only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.

As shown in fig. 1, the invention provides a sewage pretreatment system for a river drain, which comprises a river wastewater drain 1, a wastewater suspended matter filtering tank 2, a translation type garbage filtering basket 3, a nitrogen and oxygen aeration and reduction tank 4, a high-content cotton hull cellulose filtering tank 5, an organic matter wastewater tank 6, a bidirectional circulation organic matter purification device 7 and a biogas treatment and collection device 8, wherein the wastewater suspended matter filtering tank 2 is fixedly arranged on one side of the river wastewater drain 1, the translation type garbage filtering basket 3 is fixedly arranged on one side of the sidewall of the wastewater suspended matter filtering tank 2 close to the river wastewater drain 1 and arranged below the river wastewater drain 1, the nitrogen and oxygen aeration and reduction tank 4 is fixedly arranged on one side of the wastewater suspended matter filtering tank 2 and arranged on one side far away from the river wastewater drain 1, the high-content cotton hull cellulose filtering tank 5 is fixedly arranged on one side of the nitrogen and oxygen aeration and reduction tank 4 and arranged on one side far away from the river wastewater drain 1, the organic matter tank 6 is fixedly arranged on one side of the sewage tank 5, the side of the sewage tank 6 is far away from the river wastewater drain 1, the sewage treatment and the bidirectional circulation organic matter purification device 7 is suitable for collecting the organic matter contained in the biogas and purifying device.

As shown in fig. 1, the high content cotton hull cellulose filtering tank 5 comprises a cotton hull cellulose filtering tank bottom plate 9, a cotton hull cellulose filtering tank porous side wall 10 and a carbonized surface high content cotton hull cellulose filtering layer 11, the cotton hull cellulose filtering tank bottom plate 9 is fixedly arranged between the nitrogen aeration and oxygen reduction tank 4 and the organic matter wastewater tank 6, the cotton hull cellulose filtering tank porous side wall 10 is fixedly arranged on the upper wall of the cotton hull cellulose filtering tank bottom plate 9, and the carbonized surface high content cotton hull cellulose filtering layer 11 is fixedly arranged in the middle of the cotton hull cellulose filtering tank porous side wall 10.

As shown in fig. 1-2, the bidirectional circulation organic matter purification device 7 includes a single-layer sewage treatment tank 12, a multi-layer sewage dispersion cone 13, and a gas-liquid separation circulation device 14, the single-layer sewage treatment tank 12 is fixedly disposed on one side of the organic matter wastewater pond 6, the multi-layer sewage dispersion cone 13 is fixedly disposed in the single-layer sewage treatment tank 12 and disposed on the upper wall of the bottom of the single-layer sewage treatment tank 12, and the gas-liquid separation circulation device 14 is fixedly disposed above the single-layer sewage treatment tank 12.

As shown in fig. 1-3, the translational garbage filter basket 3 includes a fixed base 15 with a bearing rotating handle, a long screw rotating handle 16, a garbage filter basket sliding cantilever 17, a built-in threaded hollow precession rod 18, an end cantilever pulley 19, a garbage filter basket body 20, a garbage filter basket suspension ring 21 and a cantilever pulley bearing rope 22, the fixed base 15 with the bearing rotating handle is fixedly arranged above the side wall of the wastewater suspension filtering tank 2, the long screw rotating handle 16 is rotatably arranged on the fixed base 15 with the bearing rotating handle, the garbage filter basket sliding cantilever 17 is slidably arranged above the side wall of the wastewater suspension filtering tank 2, the built-in threaded hollow precession rod 18 is fixedly arranged on the bottom side wall of the garbage filter basket sliding cantilever 17, the end cantilever pulley 19 is rotatably arranged on the garbage filter basket sliding cantilever 17, the garbage filter basket body 20 is movably arranged under the garbage filter basket sliding cantilever 17, the garbage filter basket suspension ring 21 is fixedly arranged on the upper portion of the garbage filter basket body 20, and the cantilever pulley bearing rope 22 is arranged on the end portion of the fixed suspension ring 21.

As shown in fig. 1 and 4, the nitrogen-aeration oxygen-reduction cell 4 includes an oxygen-reduction cell body base 23, an oxygen-reduction cell body side wall 24, a solar cell panel 25, an electricity-storage power supply 26, a time controller 27, a nitrogen purification device 28 and an intermittent nitrogen injection device 29, wherein the oxygen-reduction cell body base 23 is fixedly disposed between the wastewater suspended matter filtering cell 2 and the high-content cotton hull cellulose filtering cell 5, the oxygen-reduction cell body side wall 24 is fixedly disposed on the upper wall of the oxygen-reduction cell body base 23, the solar cell panel 25 is fixedly disposed on one side of the oxygen-reduction cell body base 23, the electricity-storage power supply 26 is fixedly disposed on one side of the solar cell panel 25, the solar cell panel 25 is electrically connected with the electricity-storage power supply 26, the time controller 27 is fixedly disposed on the solar cell panel 25, the time controller 27 is electrically connected with the electricity-storage power supply 26, the nitrogen purification device 28 is fixedly disposed on one side of the oxygen-reduction cell body side wall 24, and the intermittent nitrogen injection device 29 penetrates through the oxygen-reduction cell body side wall 24 and is fixedly disposed on the oxygen-reduction cell body base 23.

As shown in fig. 1 and 5, the nitrogen purification device 28 includes an air compressor 30, a nitrogen pressure tank 31, a nitrogen inlet pipe 32 and a polyimide hollow fiber gas separation mechanism 33, the air compressor 30 is fixedly disposed on one side of the high content cotton hull cellulose filtration pool 5, the air compressor 30 is electrically connected to the time controller 27, the nitrogen pressure tank 31 is fixedly disposed on one side of the nitrogen aeration and oxygen reduction pool 4, one end of the nitrogen inlet pipe 32 is fixedly disposed on the nitrogen pressure tank 31 in a penetrating manner, and the polyimide hollow fiber gas separation mechanism 33 is fixedly disposed between the air compressor 30 and the nitrogen inlet pipe 32.

As shown in fig. 5 to fig. 6, the polyimide hollow fiber gas separation mechanism 33 includes a gas separation mechanism outer tube 34, a remaining gas separation port 35, and a polyimide hollow fiber gas separation membrane 36, the gas separation mechanism outer tube 34 is fixedly disposed between the air compressor 30 and the nitrogen gas inlet tube 32, the remaining gas separation port 35 is disposed on the gas separation mechanism outer tube 34, and the polyimide hollow fiber gas separation membrane 36 is fixedly disposed in the gas separation mechanism outer tube 34.

As shown in fig. 1 and 5, the intermittent nitrogen spraying device 29 includes a nitrogen outlet pipe 37 and a densely-distributed underwater nitrogen nozzle 38, one end of the nitrogen outlet pipe 37 is fixedly connected with the nitrogen pressure tank 31, a pipe body part of the nitrogen outlet pipe 37 penetrates through the side wall 24 of the oxygen reduction pool body and is fixedly arranged on the upper wall of the base 23 of the oxygen reduction pool body, and the densely-distributed underwater nitrogen nozzle 38 is fixedly arranged on the nitrogen outlet pipe 37.

As shown in fig. 1 and 9, the multi-layer sewage dispersion cone 13 comprises a micro submersible pump 39, a sewage inflow pipe 40, an external sludge tank top opening cone 41, an upper cone supporting block 42, an upper top opening cone 43, a sludge particle throwing pipe 44 and an internal anaerobic bacteria sludge particle 45, the micro submersible pump 39 is fixedly arranged on the inner side wall of the organic matter wastewater pond 6 far away from the river wastewater discharge outlet 1, the micro submersible pump 39 is electrically connected with the electricity storage power supply 26, one end of the sewage inflow pipe 40 penetrates through the side wall of the organic matter wastewater pond 6 and is fixedly arranged on the micro submersible pump 39, the external sludge tank top opening cone 41 is fixedly arranged on the inner upper wall of the single-layer sewage treatment barrel 12, the other end of the sewage inflow pipe 40 penetrates through the single-layer sewage treatment barrel 12 and is fixedly arranged on an external sludge tank top opening cone 41, the sewage inflow pipe 40 extends into the external sludge tank top opening cone 41, the upper-layer cone supporting block 42 is fixedly arranged on the inner upper wall of the single-layer sewage treatment barrel 12, the upper-layer top opening cone 43 is fixedly arranged on the upper-layer cone supporting block 42, the sludge particle throwing pipe 44 is fixedly arranged on the upper portion of the upper-layer top opening cone 43, the internal anaerobic bacteria sludge particles 45 are arranged between the upper-layer top opening cone 43 and the external sludge tank top opening cone 41, and the anaerobic bacteria of the internal anaerobic bacteria sludge particles 45 comprise methanogenic bacilli, methanogenic cocci, methanogenic sarcina, methanogenic myces, desulfurization vibrio sulfate reducing bacteria and the like.

As shown in fig. 1-2 and 11, the biogas processing and collecting device 8 includes a biogas purifier 46, a biogas collecting tank 47, a first biogas inlet pipe 48, a second biogas inlet pipe 49, a one-way air guide valve 50 and a pressure release valve 51, the biogas purifier 46 is fixedly disposed on one side of the single-layer sewage treatment tank 12, the biogas collecting tank 47 is fixedly disposed on one side of the biogas purifier 46 far away from the gas-liquid separation and circulation device 14, the first biogas inlet pipe 48 is fixedly disposed between the gas-liquid separation and circulation device 14 and the biogas purifier 46, the second biogas inlet pipe 49 is fixedly disposed between the biogas purifier 46 and the biogas collecting tank 47, and the pressure release valve 51 is fixedly disposed on the first biogas inlet pipe 48.

As shown in fig. 1 and 11-12, the peripheral sludge tank top opening cone 41 comprises a lower layer top opening cone body 52, a lower layer top opening cone top small hole 53 and an anaerobic sludge tank 54, the lower layer top opening cone body 52 is fixedly arranged in the single-layer sewage treatment barrel 12 and arranged on the bottom upper wall, the lower layer top opening cone top small hole 53 is arranged on the upper part of the lower layer top opening cone body 52, and the anaerobic sludge tank 54 is arranged on the outer side wall of the lower layer top opening cone body 52.

As shown in fig. 2, 9, and 13-17, the gas-liquid separation and circulation device 14 includes an external sliding limiting cylinder 55, an internal sliding limiting cylinder 56, a circulation water inlet pipe 57, a circulation water outlet pipe 58, a circulation nozzle 59, a gas overflow pipe 60, a liquid one-way suction valve 61, a liquid one-way outflow valve 62, a biogas compression chamber 63, a liquid suction chamber 64, a lower spring gas compression sliding member 65, a suction chamber built-in spring 66, a clear water outlet 67, and a magnetic float side float liquid level switch 68, the external sliding limiting cylinder 55 is fixedly disposed above the single-layer sewage treatment tank 12, the internal sliding limiting cylinder 56 is fixedly disposed inside the external sliding limiting cylinder 55, the circulation water inlet pipe 57 is fixedly disposed on the external sliding limiting cylinder 55, the circulation water inlet pipe 57 extends into the internal sliding limiting cylinder 56 from the bottom, the circulation water inlet pipe 57 is communicated with the internal sliding limiting cylinder 56, the circulation water outlet pipe 58 is fixedly disposed on the internal sliding limiting cylinder 56 from the side wall, the circulation water outlet pipe 58 is fixedly disposed on the internal sliding limiting cylinder 56, the circulation water outlet pipe 58 is fixedly disposed on the internal sliding limiting cylinder 55, the inner sliding limiting cylinder 55, the circulation water outlet pipe 58 is fixedly disposed on the inner sliding limiting cylinder 55, the inner sliding limiting cylinder 60 is fixedly disposed on the inner sliding limiting cylinder 55, the circulation water inlet pipe 58, the circulation water inlet pipe 55, the circulation water outlet pipe 58 is fixedly disposed on the inner sliding limiting cylinder 55, the circulation water inlet pipe 60 is fixedly disposed on the inner sliding limiting cylinder 55, the circulation water inlet pipe 56 is fixedly disposed on the inner sliding limiting cylinder 55, the one-way sliding limiting cylinder 60 is fixedly disposed on the inner sliding limiting cylinder 55, the one-way sliding limiting cylinder 55, the one end of the one-way sliding limiting cylinder 55, the lower end of the suction cavity built-in spring 66 is fixedly arranged on the bottom surface in the inner sliding limiting cylinder 56, the upper end of the suction cavity built-in spring 66 is fixedly arranged on the lower end of the lower spring gas compression sliding part 65, the clean water outlet 67 is fixedly arranged on the side wall above the sewage treatment barrel 12, and the magnetic float type side-mounted float liquid level switch 68 is fixedly arranged in the clean water outlet 67.

When the device is used specifically, firstly, the pressure value of the nitrogen pressure tank 31 is set, the opening and closing liquid level of the magnetic float type side-mounted float liquid level switch 68 is set, the pressure value of the pressure release valve 51 is set, the time controller 27 is opened, the time controller 27 controls the air compressor 30 to be opened, the air compressor 30 pumps air into the polyimide hollow fiber gas separation mechanism 33, small molecule gases such as oxygen and the like overflow through the polyimide hollow fiber gas separation membrane 36 through the rest gas separation ports 35, large molecule gases such as nitrogen and the like continue to stay in the polyimide hollow fiber gas separation membrane 36, then the separated nitrogen enters the nitrogen gas inlet pipe 32, the nitrogen enters the nitrogen pressure tank 31 through the nitrogen gas inlet pipe 32, and the pressure of the nitrogen pressure tank 31 is increased; when sewage that carries poisonous heavy metal ion flows into translation formula rubbish filter basket 3, translation formula rubbish filter basket 3 carries out the prefiltration to levitate solid rubbish in the sewage such as plastic bag, branch, foam, the sewage that carries poisonous heavy metal ion flows into waste water suspended solid filtering ponds 2 after the prefiltration, waste water suspended solid filtering ponds 2 are like silt, the water-insoluble inorganic matter in the sewage of poisonous heavy metal ion, clay, little suspended solid filtering ponds 2 are to the suspended solid in the poisonous heavy metal ion sewageFiltering organisms and the like, when sewage carrying toxic heavy metal ions flows into the nitrogen aeration and oxygen reduction tank 4, nitrogen begins to be released when the pressure of the nitrogen pressure tank 31 is increased to a designed pressure value, the nitrogen is injected into the toxic sewage through the densely distributed underwater nitrogen nozzle 38, when the air compressor 30 stops, the nitrogen is stopped to be released when the pressure of the nitrogen pressure tank 31 reaches a designed value or below, the nitrogen aeration and oxygen reduction tank 4 is in an anaerobic environment, when the sewage carrying the toxic heavy metal ions passes through the high-content cotton hull cellulose filtering tank 5, the high-content cotton hull cellulose filtering layer 11 on the carbonized surface adsorbs the heavy metal ions, the toxic heavy metal ions in the sewage are retained in the high-content cotton hull cellulose filtering tank 5, and micro-toxic organic matter-containing sewage is obtained, and at the moment, the oxygen content in the micro-toxic organic matter-containing sewage is still in the anaerobic environment when the oxygen content in the micro-toxic organic matter-containing sewage is extremely low; organic matter sewage flows into an organic matter wastewater pond 6 and then is pumped into an external sludge tank top perforated cone 41 through a miniature submersible pump 39, the sewage is uniformly dispersed in the external sludge tank top perforated cone 41 due to the impact effect of water flow, the water flow flows out to an upper layer top perforated cone 43 through a lower layer top perforated cone top small hole 53 of the external sludge tank top perforated cone 41, internal anaerobic bacteria sludge particles 45 are thrown into a space between the upper layer top perforated cone 43 and the external sludge tank top perforated cone 41 through a sludge particle throwing pipe 44, the anaerobic bacteria of the internal anaerobic bacteria sludge particles 45 are selected from methanogen, methanogen sarcina, methanogen and desulfurization vibrio sulfate reducing bacteria and the like, and due to the driving effect of the water flow, the internal anaerobic bacteria sludge particles 45 are uniformly distributed in an anaerobic bacteria sludge tank 54, and the anaerobic bacteria decompose the organic matter to generate CH ₄ 、CO ₂ 、N ₂ 、H ₂ 、O ₂ 、H ₂ S, etc. gas, H ₂ S is used as a reducing agent to reduce hexavalent chromium ions still remaining in the water, the hexavalent chromium ions are reduced into trivalent chromium ions, and the trivalent chromium ions are combined with sulfate ions in the water to generate cadmium sulfide precipitate; when the pressure relief valve 51 is closed, the pressure in the single-layer sewage treatment barrel 12 is increased, the gas upwards extrudes the lower spring gas compression sliding piece 66, the lower spring gas compression sliding piece 66 upwards slides, the suction cavity built-in spring 65 stretches, the liquid one-way suction valve 61 is opened, the liquid one-way outflow valve 62 is closed, and the sewage is dischargedWhen the pressure relief valve 51 is opened, the internal pressure of the single-layer sewage treatment barrel 12 is reduced, a spring 65 arranged in the suction cavity is stretched, a gas compression sliding part 66 connected with a spring is connected below the suction cavity to downwards extrude sewage, a one-way liquid suction valve 61 is closed, a one-way liquid outflow valve 62 is opened, the sewage enters a circulating water inlet pipe 57, the sewage is sprayed out from a circulating spray head 59, flows into a sludge particle throwing pipe 44 and flows through an anaerobic sludge tank 54 of an opening cone 41 at the top of the peripheral sludge tank again, the treated clean water is arranged at the upper part of the single-layer sewage treatment barrel 12, when the liquid level rises to the opening position designed by the magnetic float type side float liquid level switch 68, the magnetic float type side float liquid level switch 68 is opened, the clean water is discharged from a clean water outlet 67, when the liquid level drops to the closing position of the magnetic float type side float liquid level switch 68, the liquid level switch 68 is closed, the liquid level of the sewage in the single-layer sewage treatment barrel 12 begins to rise, wherein the liquid level of the sewage at the upper end of the sewage enters a methane treatment barrel 12 through a gas compression relief valve 43 arranged at the top of an opening of the single-layer sewage treatment barrel 12, the gas pressure relief valve 51 is increased, the methane gas collection tank 51 is collected by a methane gas collection pressure of a methane gas collection tank 48, and the methane collection tank 51, and the methane collection tank 51; when the inside rubbish of translation formula rubbish filtration basket 3 needs to be cleared up, the rotatory handle 16 of clockwise rotation long screw, the rotatory handle 16 of long screw stimulate built-in screw thread cavity precession pole 18 towards take bearing rotation handle unable adjustment base 15 one side, the rotatory handle 16 of workman anticlockwise rotation long screw after the rubbish clearance is accomplished, built-in screw thread cavity precession pole 18 promotes rubbish filtration basket slip cantilever 17 to river course waste water drain 11 position department can.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Claims

1. The utility model provides a sewage pretreatment systems for river drain which characterized in that: comprises a river wastewater discharge outlet (1), a wastewater suspended matter filtering tank (2), a translation type garbage filtering basket (3), a nitrogen aeration and oxygen reduction tank (4), a high-content cotton hull cellulose filtering tank (5), an organic matter wastewater tank (6), a bidirectional circulation organic matter purifying device (7) and a methane treatment and collection device (8), the wastewater suspension filtering tank (2) is fixedly arranged on one side of the river wastewater discharge outlet (1), the translation type garbage filtering basket (3) is fixedly arranged on one side of the side wall of the wastewater suspension filtering tank (2) close to the river wastewater discharge outlet (1), and is arranged below the wastewater discharge outlet (1) of the river channel, the nitrogen aeration and oxygen reduction tank (4) is fixedly arranged at one side of the wastewater suspended matter filtering tank (2), and is arranged at one side far away from the wastewater discharge outlet (1) of the river channel, the high-content cotton hull cellulose filter tank (5) is fixedly arranged at one side of the nitrogen aeration and oxygen reduction tank (4), and is arranged at one side far away from the river wastewater discharge outlet (1), the organic wastewater tank (6) is fixedly arranged at one side of the high-content cotton hull cellulose filter tank (5), and is arranged at one side far away from the river wastewater discharge outlet (1), the bidirectional circulating organic matter purification device (7) is fixedly arranged at one side of the organic matter wastewater pool (6), the bidirectional circulating organic matter purification device (7) contains anaerobic bacteria, the biogas treatment and collection device (8) is fixedly arranged on one side of the bidirectional circulation organic matter purification device (7);

the high-content cotton hull cellulose filtering tank (5) comprises a cotton hull cellulose filtering tank bottom plate (9), a cotton hull cellulose filtering tank porous side wall (10) and a carbonized surface high-content cotton hull cellulose filtering layer (11), wherein the cotton hull cellulose filtering tank bottom plate (9) is fixedly arranged between the nitrogen aeration and oxygen reduction tank (4) and the organic matter wastewater tank (6), the cotton hull cellulose filtering tank porous side wall (10) is fixedly arranged on the upper wall of the cotton hull cellulose filtering tank bottom plate (9), and the carbonized surface high-content cotton hull cellulose filtering layer (11) is fixedly arranged in the middle of the cotton hull cellulose filtering tank porous side wall (10);

the bidirectional circulation organic matter purification device (7) comprises a bottom sewage treatment barrel (12), a plurality of layers of sewage dispersion cones (13) and a gas-liquid separation circulation device (14), wherein the bottom sewage treatment barrel (12) is fixedly arranged on one side of the organic matter wastewater pond (6), the plurality of layers of sewage dispersion cones (13) are fixedly arranged in the bottom sewage treatment barrel (12) and are arranged on the upper wall of the bottom sewage treatment barrel (12), and the gas-liquid separation circulation device (14) is fixedly arranged above the bottom sewage treatment barrel (12);

the translation type garbage filtering basket (3) comprises a fixed base (15) with a bearing rotating handle, a long screw rod rotating handle (16), a garbage filtering basket sliding cantilever (17), a built-in threaded hollow precession rod (18), an end cantilever pulley (19), a garbage filtering basket body (20), a garbage filtering basket lifting ring (21) and a cantilever pulley bearing rope (22), wherein the fixed base (15) with the bearing rotating handle is fixedly arranged above the side wall of the wastewater suspended matter filtering pool (2), the long screw rod rotating handle (16) is rotatably arranged on the fixed base (15) with the bearing rotating handle, the garbage filtering basket sliding cantilever (17) is slidably arranged above the side wall of the wastewater suspended matter filtering pool (2), the built-in threaded hollow precession rod (18) is fixedly arranged on the side wall of the bottom of the garbage filtering basket sliding cantilever (17), the end cantilever pulley (19) is rotatably arranged on the garbage filtering basket sliding cantilever (17), the garbage filtering basket body (20) is movably arranged under the sliding cantilever (17), the garbage filtering basket body (20) is fixedly arranged on the garbage filtering basket body, and the end cantilever pulley bearing rope (22) is designed on the upper portion of the garbage filtering basket sliding cantilever lifting ring (21);

the nitrogen exposure and oxygen reduction tank (4) comprises an oxygen reduction tank body base (23), an oxygen reduction tank body side wall (24), a solar cell panel (25), an electricity storage power supply (26), a time controller (27), a nitrogen purification device (28) and an intermittent nitrogen injection device (29), wherein the oxygen reduction tank body base (23) is fixedly arranged between a wastewater suspended matter filtering tank (2) and a high-content cotton hull cellulose filtering tank (5), the oxygen reduction tank body side wall (24) is fixedly arranged on the upper wall of the oxygen reduction tank body base (23), the solar cell panel (25) is fixedly arranged on one side of the oxygen reduction tank body base (23), the electricity storage power supply (26) is fixedly arranged on one side of the solar cell panel (25), the time controller (27) is fixedly arranged on the solar cell panel (25), the nitrogen purification device (28) is fixedly arranged on one side of the oxygen reduction tank body side wall (24), and the intermittent nitrogen injection device (29) is fixedly arranged on the oxygen reduction tank body base (23);

the nitrogen purification device (28) comprises an air compressor (30), a nitrogen pressure tank (31), a nitrogen inlet pipe (32) and a polyimide hollow fiber gas separation mechanism (33), wherein the air compressor (30) is fixedly arranged on one side of the high-content cotton hull cellulose filter tank (5), the nitrogen pressure tank (31) is fixedly arranged on one side of the nitrogen aeration and oxygen reduction tank (4), one end of the nitrogen inlet pipe (32) is fixedly arranged on the nitrogen pressure tank (31) in a penetrating manner, and the polyimide hollow fiber gas separation mechanism (33) is fixedly arranged between the air compressor (30) and the nitrogen inlet pipe (32);

the polyimide hollow fiber gas separation mechanism (33) comprises a gas separation mechanism outer pipe (34), other gas separation ports (35) and a polyimide hollow fiber gas separation membrane (36), wherein the gas separation mechanism outer pipe (34) is fixedly arranged between an air compressor (30) and a nitrogen gas inlet pipe (32), the other gas separation ports (35) are arranged on the gas separation mechanism outer pipe (34), and the polyimide hollow fiber gas separation membrane (36) is fixedly arranged in the gas separation mechanism outer pipe (34);

the intermittent nitrogen spraying device (29) comprises a nitrogen outlet pipe (37) and densely-distributed underwater nitrogen nozzles (38), one end of the nitrogen outlet pipe (37) is fixedly connected with the nitrogen pressure tank (31), the body part of the nitrogen outlet pipe (37) penetrates through the side wall (24) of the oxygen reduction pool body and is fixedly arranged on the upper wall of the base (23) of the oxygen reduction pool body, and the densely-distributed underwater nitrogen nozzles (38) are fixedly arranged on the nitrogen outlet pipe (37);

the multi-layer sewage dispersion cone (13) comprises a micro submersible pump (39), a sewage inflow pipe (40), an external sludge tank top perforated cone (41), an upper cone supporting block (42), an upper top perforated cone (43), a sludge particle throwing pipe (44) and internal attached anaerobic bacteria sludge particles (45), the micro submersible pump (39) is fixedly arranged on the inner side wall of the organic matter wastewater pond (6) far away from the river wastewater discharge outlet (1), the micro submersible pump (39) is electrically connected with an electricity storage power supply (26), one end of the sewage inflow pipe (40) is fixedly arranged on the micro submersible pump (39), the external sludge tank top perforated cone (41) is fixedly arranged on the inner upper wall of the bottom sewage treatment barrel (12), the sewage inflow pipe (40) extends into the external sludge tank top opening cone (41), the upper cone supporting block (42) is fixedly arranged on the inner upper wall of the bottom sewage treatment barrel (12), the upper top opening cone (43) is fixedly arranged on the upper cone supporting block (42), the sludge particle throwing pipe (44) is fixedly arranged on the upper part of the upper top opening cone (43), the internal anaerobic bacteria sludge particles (45) are arranged between the upper top opening cone (43) and the external sludge tank top opening cone (41), and the anaerobic bacteria of the internal anaerobic bacteria sludge particles (45) comprise methanogenic bacilli, methanogenic cocci, methanogenic sarcina, the methane producing bacteria and the desulfurization vibrio sulfate reducing bacteria are produced, the peripheral sludge tank top opening cone (41) comprises a lower layer top opening cone body (52), a lower layer top opening cone top small hole (53) and an anaerobic bacteria sludge tank (54), the lower layer top opening cone body (52) is fixedly arranged in the bottom layer sewage treatment barrel (12) and is arranged on the upper wall of the bottom, the lower layer top opening cone top small hole (53) is arranged on the upper part of the lower layer top opening cone body (52), and the anaerobic bacteria sludge tank (54) is arranged on the outer side wall of the lower layer top opening cone body (52);

the gas-liquid separation circulating device (14) comprises an external sliding limiting cylinder (55), an internal sliding limiting cylinder (56), a circulating water inlet pipe (57), a circulating water outlet pipe (58), a circulating spray head (59), a gas overflow pipe (60), a liquid one-way suction valve (61), a liquid one-way outflow valve (62), a methane compression cavity (63), a liquid suction cavity (64), a lower spring gas compression sliding part (65), a suction cavity built-in spring (66), a clear water outlet (67) and a magnetic float type side-mounted float ball liquid level switch (68), wherein the external sliding limiting cylinder (55) is fixedly arranged above the single-layer sewage treatment barrel (12), the internal sliding limiting cylinder (56) is fixedly arranged inside the external sliding limiting cylinder (55), the circulating water inlet pipe (57) is fixedly arranged on the external sliding limiting cylinder (55), the circulating water outlet pipe (58) is fixedly arranged on the internal sliding limiting cylinder (56), the circulating spray head (59) is fixedly arranged at one end of the circulating water outlet pipe (58), the gas outlet pipe (60) is fixedly arranged at the bottom of the external sliding limiting cylinder (55), the liquid one-way suction valve (61) is fixedly arranged on the internal sliding limiting cylinder (57), the liquid outlet pipe (58) is fixedly arranged in the circulating water inlet pipe (62), the liquid one-way outflow limiting cylinder (61) and the liquid outlet pipe (64) is fixedly arranged in the internal sliding limiting cylinder (58), the lower spring-connected gas compression sliding part (65) is arranged in the inner sliding limiting cylinder (56) in a sliding mode, the suction cavity built-in spring (66) is fixedly arranged between the inner sliding limiting cylinder (56) and the lower spring-connected gas compression sliding part (65), the clear water outlet (67) is fixedly arranged on the side wall above the sewage treatment barrel (12), and the magnetic float type side-mounted float liquid level switch (68) is fixedly arranged in the clear water outlet (67).