CN104193086B - The apparatus and method of a kind of villages and small towns collective and distributive type sewage fast processing - Google Patents

The apparatus and method of a kind of villages and small towns collective and distributive type sewage fast processing Download PDF

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CN104193086B
CN104193086B CN201410361263.5A CN201410361263A CN104193086B CN 104193086 B CN104193086 B CN 104193086B CN 201410361263 A CN201410361263 A CN 201410361263A CN 104193086 B CN104193086 B CN 104193086B
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sewage
filler
screen
flow
sieving
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CN104193086A (en
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张列宇
王雷
席北斗
苏靖
李曹乐
李国文
余芃飞
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CNHOMELAND ENVIRONMENTAL PROTECTION Co Ltd
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CNHOMELAND ENVIRONMENTAL PROTECTION Co Ltd
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Abstract

A device for villages and small towns collective and distributive type sewage fast processing, comprising: two sections of grid makers, and the water outlet of this grid maker imports one-level surface turbulence screen apparatus, and the water outlet of one-level surface turbulence screen apparatus imports A 2/ O combined-flow flap soil oozes system, A 2the water outlet that/O combined-flow flap soil oozes system imports secondary surface turbulence screen apparatus, and the water outlet of secondary surface turbulence screen apparatus imports cyclone desanding device.The invention also discloses the method utilizing said apparatus to carry out villages and small towns collective and distributive type sewage fast processing.

Description

The apparatus and method of a kind of villages and small towns collective and distributive type sewage fast processing
Technical field
The present invention relates to the device of a kind of villages and small towns collective and distributive type sewage fast processing.
The invention still further relates to the method utilizing said apparatus to carry out sewage disposal.
Background technology
Villages and small towns Water Environment Status quo China of China is large agricultural country, and rural area area accounts for 57.59% of the national soil total area, but pays little attention to the improvement of Rural Water Pollution for various reasons always.Prevention and cure of pollution investment almost all throws into industry and city, and rural household biogas facility is almost nil.Rural Water Environment situation more and more worsens in recent years, and pollution incident happens occasionally.Its major cause: the pollutent of township and village enterprises's discharge causes water environment pollution; The a large amount of unreasonable use of agricultural chemicals, chemical fertilizer causes pollution of area source; The discharge of wastewater of plant pollutes water surrounding; Waste water injection causes water quality deterioration; The random discharge of resident living sewage and waste pollutes water surrounding.The deterioration of Rural Water Environment not only causes the underproduction to grain, and directly threatens and live in the healthy of vast Rural areas peasant.This has badly influenced the ecology in vast rural area, production and living safety and expanding economy.
Villages and small towns sewage feature and processing requirements:
(1) villages and small towns population is less, the wide and dispersion of distribution, and sewage quality, water yield fluctuation are large, and network of drains is very unsound, and therefore, selected sewage treatment process answers capacity of resisting impact load strong, and should individual curing nearby;
(2) villages and small towns economic force is weak, and therefore, sewage disposal should take into full account that cost is low, working cost is few, the technique of less energy-consumption or Non-energy-consumption;
(3) villages and small towns lack sewage disposal professional, and selected technique should manage simply, easy to maintenance.
Sewage disposal pattern in villages and small towns is in China's each region development imbalances, different villages and small towns difference is larger, in addition the difference such as Living Style, living habit that formed for a long time of Rural areas, should select applicable treatment process according to rural area particular case, its feature should meet the features such as treatment process is simple, construction cost is low, easy and simple to handle.
Summary of the invention
The object of the present invention is to provide the device of a kind of villages and small towns collective and distributive type sewage fast processing.
Another object of the present invention is to provide a kind of said apparatus that utilizes to carry out the method for fast processing to villages and small towns collective and distributive type sewage.
For achieving the above object, the device of villages and small towns provided by the invention collective and distributive type sewage fast processing, it comprises:
Two sections of grid makers, are laid with wide-meshed screen and fine screen mesh two sections of screen clothes in the framework of grid maker, the sewage through grid maker process imports in one-level surface turbulence screen apparatus by topping-up pump;
One-level surface turbulence screen apparatus is divided into upper and lower two parts by porous plate, and porous plate hole is skewed, lays quartz sand as sieving filler above porous plate; The bottom of sieving filler is provided with nanometer aeration head, and sieving filler internal skin is connected with two sections of grid makers by reducing water inlet pipe;
One-level surface turbulence screen apparatus is provided with reducing backwash pipe corresponding to below the opposite side of reducing water inlet pipe, and connect topping-up pump by back flush valves, the top of reducing backwash pipe is provided with backflash;
It is water tank below porous plate, water tank inwall uniform loading one deck nonmetal doping photocatalyst, be provided with ultraviolet sterilization lamp bottom water tank, arrange nanometer aeration head between the space of ultraviolet sterilization lamp, water tank remaining space inside is filled with semi-conductor load filler;
The water outlet of the water tank of one-level surface turbulence screen apparatus is by a hydro-pump and A 2the upper treatment zone that/O combined-flow flap soil oozes system lower part is connected, A 2the water outlet that/O combined-flow flap soil oozes system lower part lower treatment plot imports A 2/ O combined-flow flap soil oozes the lower treatment plot of system upper part;
A 2/ O combined-flow flap soil the system of oozing is divided into upper part and lower part, upper part forms upper and lower two treatment zones by flap, upper treatment zone uses pebbles to carry out Anoxic/Aerobic process and water outlet water guide to sewage, the mixed fillers that lower treatment plot adopts rubble and coarse sand to mix processes sewage under aerobic environment, and drainage flow direction is horizontal drowned flow; Lower part forms upper and lower two treatment zones by flap, the mixed fillers that upper treatment zone adopts rubble and coarse sand to mix processes sewage under anaerobic environment, drainage flow direction is horizontal drowned flow, lower treatment plot adopts pebbles to carry out anaerobic treatment and water outlet water guide to sewage, and drainage flow direction is vertical subsurface flow;
A 2the water outlet that/O combined-flow flap soil oozes system connects secondary surface turbulence screen apparatus;
Secondary surface turbulence screen apparatus is divided into upper and lower two parts by porous plate, and porous plate hole is skewed, lays modified manganese sand and natural zeolite molecular sieve mixture as sieving filler above porous plate; The bottom of sieving filler is provided with nanometer aeration head, and sieving filler internal skin is by reducing water inlet pipe and A 2the water outlet that/O combined-flow flap soil oozes system connects;
Secondary surface turbulence screen apparatus is provided with reducing backwash pipe corresponding to below the opposite side of reducing water inlet pipe, and connect topping-up pump by back flush valves, the top of reducing backwash pipe is provided with backflash;
It is water tank below porous plate, water tank inwall uniform loading one deck nonmetal doping photocatalyst, be provided with ultraviolet sterilization lamp bottom water tank, arrange nanometer aeration head between the space of ultraviolet sterilization lamp, water tank remaining space inside is filled with semi-conductor load filler;
Secondary surface turbulence screen apparatus is positioned at backflash side and is provided with aeration tube, and aeration tube is provided with multiple pore solarization air cap, and pore solarization air cap vertically upward; Above sieving filler, ultrasonic generator is installed;
The water outlet of the water tank of secondary surface turbulence screen apparatus connects cyclone desanding device by hydro-pump, and the top of cyclone desanding device is connected to the reducing backwash pipe of one-level surface turbulence screen apparatus and the reducing backwash pipe of secondary surface turbulence screen apparatus respectively;
The bottom of cyclone desanding device offers mud discharging mouth, top is provided with the motor of stirrer, and the impeller of stirrer is inclined upwardly, and sewage in pond will be made during rotation for the helical movement, the sand grains that density in sewage is larger is thrown toward the pool wall of cyclone desanding device, sinks to sand hopper under gravity.
In described device, the wide-meshed screen precision in two sections of grid makers is 21mm, and fine screen mesh precision is 8mm; Wide-meshed screen and fine screen mesh and level are that 60 degree of angles are laid.
In described device, the macrobead quartz sand of to be particle diameter the be 7-30mm of the sieving filler in one-level surface turbulence screen apparatus.
In described device, the modified manganese sand of to be particle diameter the be 0.5-1.0mm of the sieving filler in secondary surface turbulence screen apparatus and particle diameter are the natural zeolite molecular sieve mixture of 1.2-2.0mm.
In described device, water tank inwall equally loaded nonmetal doping photocatalyst is nano-TiO 2powder.
In described device, the semi-conductor load filler that water tank remaining space inside is filled is nano-TiO 2the filler that powder load is formed at solid netted polypropylene.
In described device, one-level surface turbulence screen apparatus is connected nanometer aeration machine respectively separately with the nanometer aeration head in secondary surface turbulence screen apparatus.
In described device, the stirrer rotating speed in cyclone desanding device is 10-30r/min.
The method utilizing said apparatus to carry out villages and small towns collective and distributive type sewage fast processing provided by the invention:
Sewage is under gravity by the solid granulates in two sections of screen cloth interception liquid, and the foreign material removed continuously in fluid, imported in one-level surface turbulence screen apparatus by the water inlet pipe being embedded in sieving filler top layer and carry out sieving, the surging force disturbance sieving filler top layer of water inlet cross-flow is utilized in water inlet process, form turbulent flow, preventing pollution material is piled up on sieving filler top layer and is formed resistance to smooth the passing through of current;
One-level surface turbulence screen apparatus carries out intermittent aeration, and bubble impact sieving filler during aeration, breaks up the pollution substance layer of sieving filling surface and make it float, and sewage can be filtered through sieving filler smoothly;
Sewage through the process of one-level surface turbulence screen apparatus enters A from the upper treatment zone of lower part 2after/O combined-flow flap soil oozes system, by A 2/ O combined-flow flap soil upper the treatment zone of oozing in lower part of system uses mixed fillers to process sewage under anaerobic environment, drainage flow direction is horizontal drowned flow, lower treatment plot adopts pebbles to carry out anaerobic treatment and water outlet water guide to sewage, and drainage flow direction is vertical subsurface flow; The water outlet lower treatment plot imported in upper part adopts mixed fillers to process sewage under aerobic environment, and drainage flow direction is horizontal drowned flow, and upper treatment zone uses pebbles to carry out Anoxic/Aerobic process and water outlet water guide to sewage;
From A 2/ O combined-flow flap soil oozes the sewage that system bottom enters and carries out preliminary treatment through horizontal drowned flow-vertical water guide, by using flap to extend anoxic-anaerobic part, being decomposed in a large number by hard-degraded substance in sewage, and water outlet is imported A 2/ O combined-flow flap soil oozes the up pond of undercurrent flap, system top, carries out anaerobic-aerobic process, processes under the synergy of microorganism-filler-plant to sewage, decomposes easily biodegradable organics wherein, and removes other pollution substances;
Through A 2the native sewage oozing system process of/O combined-flow flap is imported in secondary surface turbulence screen apparatus by the water inlet pipe being embedded in sieving filler top layer and carries out sieving, the surging force disturbance sieving filler top layer of water inlet cross-flow is utilized in water inlet process, form turbulent flow, preventing pollution material is piled up on sieving filler top layer and is formed resistance to smooth the passing through of current;
Secondary surface turbulence screen apparatus carries out intermittent aeration, and bubble impact sieving filler during aeration, breaks up the pollution substance layer of sieving filling surface and make it float, and sewage can be filtered through sieving filler smoothly; Above filler, right-hand member is provided with aeration tube, and aeration tube is provided with multiple pore solarization air cap, and solarization air cap vertically upward, the pollutent floated is pushed into the water surface by bubble, overflow, to backflash, mixes with water inlet and regulates influent quality, extend screen apparatus work-ing life and backwash cycle simultaneously;
Nanometer aeration head air inlet bottom one-level surface turbulence screen apparatus and secondary surface turbulence screen apparatus is O 2, for clean filler; In water tank, the air inlet of nanometer aeration head is O 3, obtain hydroxyl radical free radical in a large number by nanometer aeration, jointly improve oxidation effectiveness with ultraviolet sterilization lamp, semi-conductor load filler, be wherein rich in the water outlet of hydroxy radical qiao when device carries out backwash simultaneously, wash away sieving filler, make sieving filler obtain clean and regeneration;
The water outlet of secondary surface turbulence screen apparatus imports cyclone desanding device, and remove the sand grains in sewage, sewage is qualified discharge after above-mentioned process;
The water outlet of secondary surface turbulence screen apparatus is back to A simultaneously 2/ O combined-flow flap soil ooze system water inlet, regulating water quality and stimulating plant process of growth secretion secondary substance.
In described method, the ultraviolet sterilization lamp average shot dosage in one-level surface turbulence screen apparatus and secondary surface turbulence screen apparatus is at 300J/m 2above.
The present invention uses the large-scale floating matter in grid maker filter sewage, surface turbulence screen apparatus is used to reduce sewage inner suspension thing and colloid subsequently, to reduce the hydraulic load that follow-up soil oozes system, reduce the risk factor of system jams, re-use surface turbulence screen apparatus and advanced treatment is carried out to sewage, reduce turbidity of sewage, improve its transparency, make sewage reach discharging standards.Technological operation of the present invention is simple, successful, and capital cost is low, run simple, easy to operate, can to avoid secondary pollution in treating processes generation, lifting sewage effluent quality to recyclable resource reutilization.Wherein in surface turbulence screen apparatus, nano titanium dioxide crystal excites the free negative ion having oxidizing power under ultra violet lamp as photocatalyst, simultaneously in nanometer aeration process and the energy that excites of ultrasonic wave generating process also can occur and strengthen the generation of free negative ion, reach photocatalysis effect; And free negative ion and its break away from the constraint of covalent linkage after leave room, with nano bubble surface with electric charge produce light electrolysis effect simultaneously, intestinal bacteria, streptococcus aureus, virus etc. can be killed, decompose residual biodegradable organic compounds and toxic substance, lasting security sewage is carried out disinfection degraded.Process aspect for Environmental estrogen (as micro-harmful chemicals such as hormones agricultural chemicals, microbiotic, Dioxins, oestrogenic hormon and synthetic hormones) has very large advantage, most organic permineralization or decomposition can be made, go out Water warfare, sterilization to it while carrying out sieving process to sewage, water outlet reaches national requirements standard preferably.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram of villages and small towns of the present invention collective and distributive type sewage fast processing.
Primary clustering nomenclature in accompanying drawing:
1 wide-meshed screen; 2 two sections of grid makers; 3 fine screen mesh; 4 topping-up pumps; 5 reducing water inlet pipes; 6 sieving fillers; 7 one-level surface turbulence screen apparatus; 8 secondary surface turbulence screen apparatus; 9 reducing backwash pipes; 10 backwash valves; 11 botanical systems; 12 pebbless; 13 flaps; 14 mixed fillers; 15A 2/ O combined-flow flap soil oozes system; 16 motors; 17 cyclone desanding devices; 18 impellers; 19 hydro-pumps; 20 flowing water Valves; 21 ultraviolet sterilization lamps; 22 porous plates; 23 nanometer aeration heads; 24 semi-conductor load fillers; 25 water tanks; 26 nanometer aeration machines; 27 ultrasonic generators; 28 aeration tubes; 29 backflashes.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.It should be noted that, mention in the following description left and right, upper and lower etc. be all be as the criterion with direction shown in the drawings.
Refer to Fig. 1.
The device of villages and small towns provided by the invention collective and distributive type sewage fast processing, its primary structure comprises:
Two sections of grid makers 2, wide-meshed screen 1 (if precision is 21mm) and fine screen mesh 3 (if precision is 8mm) two sections of screen clothes are laid with in the framework of grid maker 2, wide-meshed screen 1 and fine screen mesh 3 are that 60 degree of angles are laid in framework and level, sewage is under gravity by thick, thin two sections of screen clothes, solid granulates in interception liquid, and remove the solid-liquid separating equipment of foreign material in fluid continuously; The sewage processed through grid maker 2 to import in one-level surface turbulence screen apparatus 7 by topping-up pump 4.
One-level surface turbulence screen apparatus 7 is divided into upper and lower two parts by porous plate 22.Porous plate 22 hole is skewed, lays one deck sieving filler 6 above porous plate 22, the macrobead quartz sand of sieving filler 6 to be particle diameters be 7-30mm.The bottom of sieving filler 6 is provided with nanometer aeration head 23, and sieving filler 6 internal skin is connected with two sections of grid makers 2 by reducing water inlet pipe 5.One-level surface turbulence screen apparatus 7 is provided with reducing backwash pipe 9 corresponding to below the opposite side of reducing water inlet pipe 5, connects topping-up pump 4 by back flush valves 10.Be water tank 25 below porous plate 22, water tank 25 inwall uniform loading one deck nonmetal doping photocatalyst is (as nano-TiO 2powder), be provided with ultraviolet sterilization lamp 21 bottom water tank 25, arrange nanometer aeration head 23 between the space of ultraviolet sterilization lamp 21, water tank 25 remaining space inside is filled with semi-conductor load filler 24 (as nano-TiO 2powder load is at solid netted polypropylene filler), semi-conductor load filler 24 is fixed on carrier by the present invention, solving conventional photocatalyst needs dispersion agent to work in coordination with the drawback of use, decreases the leakage of catalyzer, avoids the separating step that reaction terminates rear catalyst.
The water outlet of the water tank 25 of one-level surface turbulence screen apparatus 7 is by hydro-pump 19 and an A 2/ O combined-flow flap soil oozes system 15 and is connected.
A 2/ O combined-flow flap soil oozes system 15 and is divided into upper and lower two parts, upper part is divided into upper and lower two treatment zone A and B by flap 13, upper treatment zone A uses pebbles to carry out Anoxic/Aerobic process and water outlet water guide to sewage, the mixed fillers 14 that lower treatment plot B adopts rubble and coarse sand to mix processes sewage under aerobic environment, and drainage flow direction is horizontal drowned flow; Lower part is divided into upper and lower two treatment zones by flap 13 equally, the mixed fillers that upper treatment zone C adopts rubble and coarse sand to mix processes sewage under anaerobic environment, drainage flow direction is horizontal drowned flow, lower treatment plot D adopts pebbles to carry out anaerobic treatment and water outlet water guide to sewage, and drainage flow direction is vertical subsurface flow.
Sewage is intake from lower tip, preliminary treatment is carried out through horizontal drowned flow-vertical water guide, reasonable employment flap in treating processes, anoxic-anaerobic part in prolongation system, decomposes in a large number by hard-degraded substance in sewage, by topping-up pump, its water outlet is imported the up pond of undercurrent flap, top, carry out anaerobic-aerobic process, under the synergy of microorganism-filler-plant, sewage is processed, decompose easily biodegradable organics wherein, and remove other pollution substances.
A 2/ O combined-flow flap soil oozes system 15 and connects secondary surface turbulence screen apparatus 8, and structure, the principle of work of secondary surface turbulence screen apparatus 8 and one-level surface turbulence screen apparatus 7 are substantially identical.Difference is the natural zeolite molecular sieve mixture of 1.2-2.0mm at the modified manganese sand of the sieving filler 6 of secondary surface turbulence screen apparatus 8 to be particle diameters be 0.5-1.0mm and particle diameter, is the multi-functional mixed fillers integrating absorption, ion-exchange, coagulation and removal heavy metal.Above sieving filler 6, be positioned at backflash 29 side is provided with aeration tube 28 simultaneously, and aeration tube 28 is provided with multiple pore solarization air cap, and pore solarization air cap vertically upward; Ultrasonic generator 27 is installed above sieving filler 6.The water outlet of the water tank 25 of secondary surface turbulence screen apparatus 8 connects cyclone desanding device 17 by hydro-pump 19, the bottom of cyclone desanding device 17 offers mud discharging mouth (known technology, not shown in the figures), top is provided with the motor 16 of stirrer, the impeller 18 of stirrer is inclined upwardly, and will make sewage in pond (stirrer rotating speed can control at 10-30r/min) for the helical movement during rotation.Sand grains in sewage is due to suffered centrifugal force difference, and the sand grains that relative density is larger is thrown toward the pool wall of cyclone desanding device 17, sinks to sand hopper under gravity.The top of cyclone desanding device 17 is connected to the reducing backwash pipe 9 of one-level surface turbulence screen apparatus 7 and the reducing backwash pipe 9 of secondary surface turbulence screen apparatus 8 respectively.
One-level surface turbulence screen apparatus 7 and secondary surface turbulence screen apparatus 8 are when carrying out sieving, nanometer aeration intermittent aeration in tank, during aeration, tank internal gas pressure increases, air is cut into bubble by porous plate and heaves, impact sieving filler, break up the pollution substance layer of filling surface and make it float, sewage can be filtered through sieving filler smoothly; Above filler, right-hand member is provided with aeration tube, aeration tube is provided with multiple pore solarization air cap, solarization air cap vertically upward, the pollutent floated is pushed into the water surface by bubble, in right side overflow to backflash, mixes regulate influent quality with water inlet, extend screen apparatus work-ing life and backwash cycle simultaneously, for the situation that influent turbidity is lower, even without the need to back flushing, constantly can run and purify waste water.
Bottom sieving filler in one-level surface turbulence screen apparatus 7 and secondary surface turbulence screen apparatus 8, the air inlet of nanometer aeration head is O 2, for clean filler; In water tank, the air inlet of nanometer aeration head is O 3obtain hydroxyl radical free radical in a large number by nanometer aeration, jointly improve advanced oxidation effect with ultraviolet sterilization lamp and semi-conductor load filler, be wherein rich in the water outlet of hydroxy radical qiao when device carries out backwash simultaneously, wash away sieving filler, accomplish that filler is clean and regenerate preferably.Ultraviolet sterilization lamp average shot dosage is at 300J/m 2above.
The mode of nanometer aeration is used to improve -oH production rate, because microbubble has huge quantity, specific surface area, slowly lift velocity, considerably increases gas liquid interfacial area, duration of contact, is conducive to ozone soluble in water, overcomes the shortcoming that ozone is insoluble in water.Microbubble inside there is larger pressure and nano bubble breaks time interface disappear, the chemical energy that surrounding environment acutely changes generation impels and produces more hydroxyl radical free radical, strengthens the ability of ozone oxidation decomposing organic matter.
Ozone produces OH under the radiation of UV-light, and ozone takes away the electronics of titanium dioxide photoinduced electron hole centering, thus creates more hydroxyl radical free radical, accelerates organic degraded, is processed organic pollutant by the strong oxidation of OH.
The right-hand member of two sections of grid makers is by topping-up pump 4, grid maker water outlet is imported when one-level surface turbulence screen apparatus works, reducing water inlet pipe 5 is embedded in sieving filler 6 top layer, the surging force disturbance sieving filler top layer of water inlet cross-flow is utilized in water inlet process, form turbulent flow, prevent from piling up on sieving filler top layer due to pollution substance and forming resistance to smooth the passing through of current.During the work of secondary surface turbulence screen apparatus, import A 2/ O combined-flow flap soil oozes the water inlet of system 15, is formed and the state when one-level surface turbulence screen apparatus works.
Because the aeration head in I and II surface turbulence screen apparatus all connects a nanometer aeration machine, when I and II surface turbulence screen apparatus carries out back flushing, nanometer aeration head starts aeration, when high-temperature nano aeration, nanometer aeration process is carried out to sand grains, under the effect of the surging force produced in the shearing force and aeration process of high temperature, the small bubble of nanometer, impurity, colloid and epontic microbial film that cleaning filler dams.Carry out back flushing by the water outlet of topping-up pump importing cyclone desanding device simultaneously, reducing backwash pipe applies a direction force left to sieving filler, and water tank is in water filling process, air on liquid level is extruded by brute force, sieving packing layer is risen to by porous plate, sieving filler is made to present boiling flow state, in water tank air emptying after, current continue through porous plate hole right bank upwards flow at high speed, in whole backwash process, reducing backwash in-pipe flow rinses left simultaneously, whole sieving filler forms the turbulent flow of fast turn-around under the surging force of current, phase mutual friction in the counterclockwise micro cyclone that sieving filler is formed under the effect of different directions power, the organic pollutant of attachment is removed, be conducive to obtaining comparatively pure filler.
The present invention successively adopts three grades of backwashing technologies to carry out back flushing:
One-level back flushing is aeration cycle back flushing, because pollution substance is in the accumulation of filling surface, space infiltration between sewage is difficult to through filler is gone down, back flushing is carried out in sieving process, open nanometer aeration machine 26 above aeration tube 28 intermittently starting porous plate, the discontinuous work of nanometer aeration head in water collecting basin, air is upwards heaved from porous plate, be divided into small bubbles, interval breaks up the fine and close crud layer on sieving filler, pollution substance layer is broken into sheet and floats, when the buoyancy of aeration tube and necking pipe water inlet thrust to the right synergy under produce impeller effect, clean the fine and close pollutent of filler top layer sheet energetically, overflow is to backflash, the pollutent that filler is retained is concentrated outside remover, mix with water inlet and again process, sewage also can continue the infiltration from molecular sieve space and go down, one-level back flushing can extend screen apparatus work-ing life and backwash cycle, for the situation that influent turbidity is lower, even without the need to back flushing, device constantly can be run and purify waste water.
Secondary back flushing is air pulse back flushing, because turbidity of sewage is too high, causes pollution substance at the bulk deposition of filling surface, only still can not reach the effect continuing sieving by one-level backwash step.Now stopping is intake and is closed the flowing water Valve 20 of I and II surface turbulence screen apparatus, open topping-up pump 4 and backwash valve 10, start nanometer aeration machine 26 above porous plate, the water outlet in cyclone desanding device is imported the reducing water inlet pipe of I and II surface turbulence screen apparatus.Under the effect of pressure of return water, whole air in water tank are subject to crushing failure at high speed, rise along the pore on porous plate, under the impact force action of whole sieving packing layer nanometer aeration head under the impeller effect and filler of ascending air, swivel disturbance, the pollution substance fragmentation of filler space is floated, again under the buoyancy of aeration tube and water inlet impact the synergy of flow-stopping plate thrust to the right, overflow mixes to backflash with initially intaking, and treats that the water surface declines fast.After filtering rate is stablized again, close nanometer aeration machine 26 and backwash valve 10 below topping-up pump 4, porous plate, open flowing water Valve 20, recover water inlet and proceed sieving process.
Three grades of back flushinges are the back flushing of aeration turbulent flow, and now I and II back flushing has been not enough to covering, the obstructing problem of address contamination confrontation filler, and sewage must not gather in a large number and filtered.Now stop water inlet, open topping-up pump 4, backwash valve 10 and flowing water Valve 20, start ultrasonic generator 27 and nanometer aeration machine 26, reverse starting hydro-pump 19, imports in water collecting basin in a large number by water outlet:
(1) water collecting basin inner air stirs along the rising of porous plate pore, and bottom filler, nanometer aeration head starts aeration, and above filler, turbine constantly rotates;
(2) utilize the collaborative cleaning of nanometer aeration techno-shock, oxidation, air supporting and high temperature action, top filler presents turbulence state, carry out random high-speed motion state, filler phase mutual friction under the surging force of current vortex and the shear action of bubble, the organic pollutant that filler adheres to can be removed, and obtains comparatively pure filler;
(3) utilize ultrasonic generator to produce ultrasonic wave in liquid medium, cavitation effect is produced at sieving filling surface, the shockwave formed when cavitation steam bubble breaks in closing course, the surge pressure of thousands of air pressure can be produced around it, act on filling surface and destroy viscosity between dirt, and make them be dispersed in backwash liquor rapidly, thus reach the effect of filling surface cleaning.
(4), after air emptying, the water outlet of outlet sump continues to import, the water outlet of being rich in hydroxy radical qiao rinse turbulence state filler particles surface and micropore, peel off pollution substance, filler is regenerated.
And pollution substance under water flow impact pressure and right side aeration tube air supporting effect constantly to floating up to the water surface, flow out from left end influent weir and right-hand member backflash and mix with initially intaking.Through three grades of back flushinges, internal contamination thing by clean-drain totally.
Conventional sand filtration is not disturbance layer of sand in filtration procedure, and current are flow through between sand fine gap.Usual employing not disturbance layer of sand, compacting filler, increase hydraulic pressure, the means such as additional trellis improve sand filtration process on sand, allow current flow through between sand fine gap, and pollution substance rest on the top layer of layer of sand.The present invention utilizes necking pipe high-pressure water inlet disturbance filler top layer, smooth pass through of preventing pollution material buildup to current forms resistance, utilize the means modifying device such as surging force and shearing force of advanced oxidation, ultrasonic wave, nanometer aeration, bubble simultaneously, utilize the filler such as molecular sieve, manganese sand to be optimized design, finally use three grades of back flushinges etc. to improve treating processes.The rejection effect of this device to suspended substances such as colloid, fiber, algae is good, for the lower water quality of turbidity even without the need to back flushing, treating processes can be completed, there is removal stink simultaneously, kill the microorganism such as bacterium, pathogenic bacteria, decompose effect of the biodegradable organic compounds such as a small amount of remaining surface activator, polychlorobiphenyl of difficult degradation.
The nano-TiO of carbon doping of the present invention 2the preparation of powder:
Sluggish precipitation and hydrothermal method two step process is adopted to prepare the nano-TiO of carbon doping 2.With titanium sulfate and urea for forerunner, glucose is carbon source, concrete preparation process is as follows: get 6.48g27 titanium sulfate and 3.24g54 urea (mol ratio of titanium sulfate and urea is 1:2) is dissolved in deionized water, add appropriate glucose 0.6 again to stir, 1:2:0.023 reacts 2h under the condition of 90 DEG C.Question response terminates rear taking-up reactants dry, is repeatedly washed to neutrality, again dry, obtains the nano-TiO of carbon doping with ball mill grinding 2powder.
Nano-TiO 2the method of powder load on filler:
Adopt the tridimensional network filler of polypropylene material, by nano-TiO 2powder mixes with deionized water (powder is 1:20 with the mass ratio of water), emulsion is become with ultrasonic echography, the tridimensional network filler of cleaning is immersed the titanate coupling agent mixed with ethanol 1:1, slowly stir for some time, then filler is taken out and put into TiO 2continue in emulsion to stir for some time, put into dry (less than the 85 DEG C) 2h of baking oven after taking-up, i.e. obtained loaded with nano TiO 2polypropylene suspension filler, its outward appearance is faint yellow, and rete is more even.

Claims (10)

1. a device for villages and small towns collective and distributive type sewage fast processing, it comprises:
Two sections of grid makers, are laid with wide-meshed screen and fine screen mesh two sections of screen clothes in the framework of grid maker, the sewage through grid maker process imports in one-level surface turbulence screen apparatus by topping-up pump;
One-level surface turbulence screen apparatus is divided into upper and lower two parts by porous plate, and porous plate hole is skewed, lays quartz sand as sieving filler above porous plate; The bottom of sieving filler is provided with nanometer aeration head, and sieving filler internal skin is connected with two sections of grid makers by reducing water inlet pipe;
One-level surface turbulence screen apparatus is provided with reducing backwash pipe corresponding to below the opposite side of reducing water inlet pipe, and connect topping-up pump by back flush valves, the top of reducing backwash pipe is provided with backflash;
It is water tank below porous plate, water tank inwall uniform loading one deck nonmetal doping photocatalyst, be provided with ultraviolet sterilization lamp bottom water tank, arrange nanometer aeration head between the space of ultraviolet sterilization lamp, water tank remaining space inside is filled with semi-conductor load filler;
The water outlet of the water tank of one-level surface turbulence screen apparatus is by a hydro-pump and A 2the upper treatment zone that/O combined-flow flap soil oozes system lower part is connected, A 2the water outlet that/O combined-flow flap soil oozes system lower part lower treatment plot imports A 2/ O combined-flow flap soil oozes the lower treatment plot of system upper part;
A 2/ O combined-flow flap soil the system of oozing is divided into upper part and lower part, upper part forms upper and lower two treatment zones by flap, upper treatment zone uses pebbles to carry out Anoxic/Aerobic process and water outlet water guide to sewage, the mixed fillers that lower treatment plot adopts rubble and coarse sand to mix processes sewage under aerobic environment, and drainage flow direction is horizontal drowned flow; Lower part forms upper and lower two treatment zones by flap, the mixed fillers that upper treatment zone adopts rubble and coarse sand to mix processes sewage under anaerobic environment, drainage flow direction is horizontal drowned flow, lower treatment plot adopts pebbles to carry out anaerobic treatment and water outlet water guide to sewage, and drainage flow direction is vertical subsurface flow;
A 2the water outlet that/O combined-flow flap soil oozes system connects secondary surface turbulence screen apparatus;
Secondary surface turbulence screen apparatus is divided into upper and lower two parts by porous plate, and porous plate hole is skewed, lays modified manganese sand and natural zeolite molecular sieve mixture as sieving filler above porous plate; The bottom of sieving filler is provided with nanometer aeration head, and sieving filler internal skin is by reducing water inlet pipe and A 2the water outlet that/O combined-flow flap soil oozes system connects;
Secondary surface turbulence screen apparatus is provided with reducing backwash pipe corresponding to below the opposite side of reducing water inlet pipe, and connect topping-up pump by back flush valves, the top of reducing backwash pipe is provided with backflash;
It is water tank below porous plate, water tank inwall uniform loading one deck nonmetal doping photocatalyst, be provided with ultraviolet sterilization lamp bottom water tank, arrange nanometer aeration head between the space of ultraviolet sterilization lamp, water tank remaining space inside is filled with semi-conductor load filler;
Secondary surface turbulence screen apparatus is positioned at backflash side and is provided with aeration tube, and aeration tube is provided with multiple pore solarization air cap, and pore solarization air cap vertically upward; Above sieving filler, ultrasonic generator is installed;
The water outlet of the water tank of secondary surface turbulence screen apparatus connects cyclone desanding device by hydro-pump, and the top of cyclone desanding device is connected to the reducing backwash pipe of one-level surface turbulence screen apparatus and the reducing backwash pipe of secondary surface turbulence screen apparatus respectively;
The bottom of cyclone desanding device offers mud discharging mouth, top is provided with the motor of stirrer, and the impeller of stirrer is inclined upwardly, and sewage in pond will be made during rotation for the helical movement, the sand grains that density in sewage is larger is thrown toward the pool wall of cyclone desanding device, sinks to sand hopper under gravity.
2. device according to claim 1, wherein, the wide-meshed screen precision in two sections of grid makers is 21mm, and fine screen mesh precision is 8mm; Wide-meshed screen and fine screen mesh and level are that 60 degree of angles are laid.
3. device according to claim 1, wherein, the macrobead quartz sand of to be particle diameter the be 7-30mm of the sieving filler in one-level surface turbulence screen apparatus.
4. device according to claim 1, wherein, the modified manganese sand of to be particle diameter the be 0.5-1.0mm of the sieving filler in secondary surface turbulence screen apparatus and particle diameter are the natural zeolite molecular sieve mixture of 1.2-2.0mm.
5. device according to claim 1, wherein, water tank inwall equally loaded nonmetal doping photocatalyst is nano-TiO 2powder.
6. device according to claim 1, wherein, the semi-conductor load filler that water tank remaining space inside is filled is nano-TiO 2the filler that powder load is formed at solid netted polypropylene.
7. device according to claim 1, wherein, one-level surface turbulence screen apparatus is connected nanometer aeration machine respectively separately with the nanometer aeration head in secondary surface turbulence screen apparatus.
8. device according to claim 1, wherein, the stirrer rotating speed in cyclone desanding device is 10-30r/min.
9. utilize device described in claim 1 to carry out the method for villages and small towns collective and distributive type sewage fast processing:
Sewage is under gravity by the solid granulates in two sections of screen cloth interception liquid, and the foreign material removed continuously in fluid, imported in one-level surface turbulence screen apparatus by the water inlet pipe being embedded in sieving filler top layer and carry out sieving, the surging force disturbance sieving filler top layer of water inlet cross-flow is utilized in water inlet process, form turbulent flow, preventing pollution material is piled up on sieving filler top layer and is formed resistance to smooth the passing through of current;
One-level surface turbulence screen apparatus carries out intermittent aeration, and bubble impact sieving filler during aeration, breaks up the pollution substance layer of sieving filling surface and make it float, and sewage can be filtered through sieving filler smoothly;
Sewage through the process of one-level surface turbulence screen apparatus enters A from the upper treatment zone of lower part 2after/O combined-flow flap soil oozes system, by A 2/ O combined-flow flap soil upper the treatment zone of oozing in lower part of system uses mixed fillers to process sewage under anaerobic environment, drainage flow direction is horizontal drowned flow, lower treatment plot adopts pebbles to carry out anaerobic treatment and water outlet water guide to sewage, and drainage flow direction is vertical subsurface flow; The water outlet lower treatment plot imported in upper part adopts mixed fillers to process sewage under aerobic environment, and drainage flow direction is horizontal drowned flow, and upper treatment zone uses pebbles to carry out Anoxic/Aerobic process and water outlet water guide to sewage;
From A 2/ O combined-flow flap soil oozes the sewage that system bottom enters and carries out preliminary treatment through horizontal drowned flow-vertical water guide, by using flap to extend anoxic-anaerobic part, being decomposed in a large number by hard-degraded substance in sewage, and water outlet is imported A 2/ O combined-flow flap soil oozes the up pond of undercurrent flap, system top, carries out anaerobic-aerobic process, processes under the synergy of microorganism-filler-plant to sewage, decomposes easily biodegradable organics wherein, and removes other pollution substances;
Through A 2the native sewage oozing system process of/O combined-flow flap is imported in secondary surface turbulence screen apparatus by the water inlet pipe being embedded in sieving filler top layer and carries out sieving, the surging force disturbance sieving filler top layer of water inlet cross-flow is utilized in water inlet process, form turbulent flow, preventing pollution material is piled up on sieving filler top layer and is formed resistance to smooth the passing through of current;
Secondary surface turbulence screen apparatus carries out intermittent aeration, and bubble impact sieving filler during aeration, breaks up the pollution substance layer of sieving filling surface and make it float, and sewage can be filtered through sieving filler smoothly; Above filler, right-hand member is provided with aeration tube, and aeration tube is provided with multiple pore solarization air cap, and solarization air cap vertically upward, the pollutent floated is pushed into the water surface by bubble, overflow, to backflash, mixes with water inlet and regulates influent quality, extend screen apparatus work-ing life and backwash cycle simultaneously;
Nanometer aeration head air inlet bottom one-level surface turbulence screen apparatus and secondary surface turbulence screen apparatus is O 2, for clean filler; In water tank, the air inlet of nanometer aeration head is O 3, obtain hydroxyl radical free radical in a large number by nanometer aeration, jointly improve oxidation effectiveness with ultraviolet sterilization lamp, semi-conductor load filler, be wherein rich in the water outlet of hydroxy radical qiao when device carries out backwash simultaneously, wash away sieving filler, make sieving filler obtain clean and regeneration;
The water outlet of secondary surface turbulence screen apparatus imports cyclone desanding device, and remove the sand grains in sewage, sewage is qualified discharge after above-mentioned process;
The water outlet of secondary surface turbulence screen apparatus is back to A simultaneously 2/ O combined-flow flap soil ooze system water inlet, regulating water quality and stimulating plant process of growth secretion secondary substance.
10. method according to claim 9, wherein, the ultraviolet sterilization lamp average shot dosage in one-level surface turbulence screen apparatus and secondary surface turbulence screen apparatus is at 300J/m 2above.
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