CN102557350A - Purification system for micro-polluted raw water and purification method thereof - Google Patents
Purification system for micro-polluted raw water and purification method thereof Download PDFInfo
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- CN102557350A CN102557350A CN2012100166385A CN201210016638A CN102557350A CN 102557350 A CN102557350 A CN 102557350A CN 2012100166385 A CN2012100166385 A CN 2012100166385A CN 201210016638 A CN201210016638 A CN 201210016638A CN 102557350 A CN102557350 A CN 102557350A
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Abstract
The invention relates to a purification system for micro-polluted raw water, comprising a stripping oil separation tank, a coagulating sedimentation tank, a coagulating chemical dosing device, a first middle water tank, a water feeding pump, a biological aerated filter, a second middle water tank, a coagulating chemical dosing unit, a filtering lift pump, a multi-media filter, a manganese sand filter, an active carbon filter, an acid dosing device, a scale inhibitor dosing device, a mixer, a reverse osmosis device, an alkali dosing device, a disinfection device and an ultraviolet sterilization device. The purification system for micro-polluted raw water disclosed by the invention has the following advantages that: main pollutants are especially removed at first, and then a reverse osmosis technology is used as a safety guarantee; the reverse osmosis pre-treatment is designed adequately, and the operation of the system is safe and stable, so that the occurrence frequency of pollution and blockage phenomena is greatly decreased, chemical cleaning period is greatly prolonged, and the recycling rate of water is up to 75%; and the purification system is suitable for the occasions of treating the drinking water of municipal administration, villages, industrial enterprises and mine fields or for the occasions of reusing the reclaimed water which needs advanced treatment. The invention further refers to a purification method of the purification system for micro-polluted raw water.
Description
Technical field
The present invention relates to water treatment water purification field, relate in particular to a kind of water, surface water, pit water under micro-polluted are purified and be the micro-polluted raw purification system and the purifying method thereof of Drinking Water.
Background technology
The pollution that socioeconomic fast development, water resources suffer is also more and more serious, and especially drinking water pollution is particularly outstanding, and human daily life water safety receives more and more serious threat.In the area that some water resourcess lack; The area that remote districts, Rural areas and the water source that particularly economy is backward relatively polluted; Because the choosing, carry of good water sources needs a large amount of investments, local people and government be unable to bear this investment, and the people use behind surface water or the direct or simple clarification disinfecting of exploiting groundwater as Drinking Water in a large number; And the also unprocessed direct random discharging of sewage, a large amount of uses of rural area agricultural chemicals all bring surface water and phreatic pollution.Mining site generally all is positioned at mountain area or remote districts, does not have the water source supply of living on one's own life, and is basically to supply with use after adopting underground water or pit water simple process.These Drinking Waters of taking supply mode all are unsafe, have brought potential harm to the user is healthy.
The technological design of existing various micro-polluted raw purification techniques is single relatively, can not fully ensure the ability that the qualified tap water of safety is provided for the former water that source of pollution become increasingly complex, pollutant kind is more and more, the Pollutant levels fluctuation range is bigger.
The Application of membrane band revolution of water technology, but the membrane technique widespread use also shows the deficiency that exists in the method for use gradually, all is pressed in the removal of all contaminations load on ultrafiltration, nanofiltration, the reverse osmosis membrane; The pretreatment technology design can not be satisfied film fully and handle the water inlet requirement; And the impact that fluctuation brings for raw water quality does not possess adaptive faculty, and this dirt that has increased the weight of film is stifled, and has caused the water purification cost to increase; And the water cleaning systems fluctuation of service, water utilization rate is low.
Summary of the invention
In view of this; The present invention is necessary to provide a kind of stable, micro-polluted raw purification system and purifying method thereof that performance is preferable; It is to water, surface water, pit water under micro-polluted; Especially receive organism, nitrogen, phosphorus, hydrogen sulfide, iron, manganese, fluorochemical, petroleum-type pollution and the bigger former water of total hardness and carry out the technology that purifying treatment is a tap water, can be the user tap water that meets national hygiene standard for drinking water is provided.
Solving the problems of the technologies described above the technical scheme that is adopted is: a kind of micro-polluted raw purification system; It comprises the stripping oil trap; Coagulative precipitation tank; The coagulation dosing device; First intermediate pool; Service pump; BAF; Second intermediate pool; Flocculation dosing unit; Filter lift pump; More medium filter; The filtration with manganese sand device; Activated charcoal filter; The acid chemicals dosing plant; The Scale inhibitors chemicals dosing plant; Mixing tank; Reverse osmosis unit; The alkali chemicals dosing plant; Sterilizing unit and ultraviolet sterilization apparatus; Wherein
Said stripping oil trap is used for the non-oil in water emulsion of micro-polluted raw is separated from said micro-polluted raw;
Said coagulative precipitation tank is used for the colloid of the water outlet of said stripping oil trap, Fe
3+, suspended substance is gathered into flocs unit and therefrom separates under the flocculation of coagulating agent, bridging action, the phosphorus in the water is removed in said flocs unit absorption;
Said coagulation dosing unit is used for adding said coagulating agent toward said coagulative precipitation tank;
Said first intermediate pool is used to cushion the water outlet of said coagulative precipitation tank;
Said service pump is used to promote the water outlet of said first intermediate pool and its bottom from said BAF is got into;
Said BAF is used to carry out microvesicle aeration, biological degradation, oxidation adsorption filtration;
Said second intermediate pool is used to cushion the water outlet of said BAF;
Said filtration lift pump, the water outlet that is used to promote said second intermediate pool gets into its top from said more medium filter;
Said flocculation dosing unit is used for flocculation agent is added in the water outlet of said second intermediate pool;
Said more medium filter is used for suspended substance, the colloid of the water outlet of said second intermediate pool of filtering;
Said filtration with manganese sand device is used for reducing manganese, the iron ion content of the water outlet of said more medium filter;
Said activated charcoal filter reaches the requirement of said reverse osmosis unit influent quality after chlorine residue is removed in impurity such as peculiar smell, colourity, organism and the reduction that is used for the water outlet of the said filtration with manganese sand device of adsorption filtration;
Said sour chemicals dosing plant is used to reduce the pH value of the water outlet of said activated charcoal filter;
Said Scale inhibitors chemicals dosing plant is used for adding Scale inhibitors in the water outlet of said activated charcoal filter;
Said mixing tank is used in the water outlet of said activated charcoal filter said sour chemicals dosing plant being mixed with the medicine that said Scale inhibitors chemicals dosing plant adds;
Said reverse osmosis unit is used for separating inorganic salt, residual organic substances, ammonia nitrogen (the ionic state NH of the water outlet of tackling said activated charcoal filter
4 +), impurity such as total nitrogen, total phosphorus form fresh water and dense water;
Said alkali chemicals dosing plant is used to improve the suitable pH value of pH value to human body of the said fresh water of said reverse osmosis unit;
The sterilization that carries out disinfection forms domestic water to the said fresh water of said reverse osmosis unit for said sterilizing unit and said ultraviolet sterilization apparatus, and said sterilizing unit also adds sterilizing agent to the water outlet of said BAF.
Further improvement as such scheme; Said stripping oil trap is separated into first subpool, second subpool and rectification subpool successively, offers first channel between said first subpool and said second subpool, and the bottom between said second subpool and the said rectification subpool offers second passage; Be provided with water distributor, pre-exposure tracheae and mud drainage slot in said first subpool; Be provided with some swash plates that are parallel to each other and oil scupper in said second subpool, wherein
Said mud drainage slot is distributed in the bottom in said first subpool, is used for getting rid of said micro-polluted raw sedimentary foreign material in said first subpool,
Said water distributor is evenly distributed on the body bottom, pond in said first subpool, is used for said micro-polluted raw is uniformly distributed in first subpool;
Said pre-exposure tracheae is arranged on the bottom of said first subpool, is used for said micro-polluted raw is carried out preaeration;
Said some swash plates evenly spaced apart in said second subpool the middle part and be positioned under the said first channel; Said some swash plates favour the wall of said second subpool; And said first channel and said second passage are positioned at the two ends of said some swash plates, and said some swash plates are used for the non-oil in water emulsion of said micro-polluted raw is separated from said micro-polluted raw;
Said oil scupper is arranged on the top of said second subpool.
Further improvement as such scheme; The coagulating agent mixed aeration pipe that the top of said coagulative precipitation tank is provided with the water inlet of the water outlet that is used to receive said stripping oil trap and is used for being connected with said coagulation dosing unit; The bottom of said coagulative precipitation tank is provided with mud drainage slot; Said coagulative precipitation tank is separated into some flocculation reaction subpools, rectification subpool and deposition subpool successively, and wherein, the middle part of each flocculation reaction subpool is provided with the flocculation reaction case; Said rectification subpool is provided with the partition wall perpendicular to its bottom; Said partition wall is divided into two parts with the lower section of said rectification subpool, and the top of said deposition subpool is provided with water leg, and the middle part of said deposition subpool is provided with evenly some swash plates spaced apart; The bottom of said deposition subpool is set to water distributing area; The water outlet of said stripping oil trap mixes in the said some flocculation reaction subpools of back entering through said water inlet and with coagulating agent that said coagulating agent chemicals dosing plant adds carries out flocculation reaction, gets into said rectification subpool again and carries out rectification buffering, uniform water distribution, gets into said deposition subpool at last and carries out mud-water separation.
Further improvement as such scheme; Following three zones during said BAF is arranged to; Said lower area is water distributing area and is provided with water distributor in the bottom; The zone is provided with microporous aeration device in said for biological packing area and in the bottom, and the said zone of going up is for receiving the pool and being provided with water leg at the top.
Further improvement as such scheme; Said micro-polluted raw purification system also comprises air-blast device; Be used to send into air to said stripping oil trap, said coagulative precipitation tank and said BAF, said air-blast device adopts gas blower or the backwash blower fan that all communicates with said stripping oil trap, said coagulative precipitation tank and said BAF.
Further improvement as such scheme; Said micro-polluted raw purification system also comprises the high-order dense water tank that communicates with said reverse osmosis unit and be used to receive said dense water; The height of the dense water tank of a said high position is greater than the height of said more medium filter, said filtration with manganese sand device, said activated charcoal filter; Said elevated tank all is connected with said more medium filter, said filtration with manganese sand device, said activated charcoal filter, utilizes the water outlet of said elevated tank that said more medium filter, said filtration with manganese sand device, said activated charcoal filter are washed.
Further improvement as such scheme; Said micro-polluted raw purification system also comprises the chemically-cleaning device that is used for said reverse osmosis unit reverse-osmosis membrane element matting; Said chemically-cleaning device comprises matting water tank, flushing water pump and filter rinsed; Said matting water tank adopts the isolating said fresh water of said reverse osmosis unit to prepare matting solution; Said flushing water pump promotes in said cleaning solution to the said filter rinsed in the said cleaning water tank, and said strainer is connected in the cleaning inlet of said reverse osmosis unit.
The present invention also provides a kind of micro-polluted raw purifying method, and it is applied in the above-mentioned micro-polluted raw purification system, and it may further comprise the steps:
Through the stripping oil trap of said micro-polluted raw purification system, the non-oil in water emulsion in the micro-polluted raw is separated from said micro-polluted raw;
Through the coagulative precipitation tank of said micro-polluted raw purification system, with the colloid in the water outlet of said stripping oil trap, Fe
3+, suspended substance is gathered into flocs unit and therefrom separates the phosphorus in the said flocs unit planar water under the flocculation of coagulating agent, bridging action;
Through the coagulation dosing unit of said micro-polluted raw purification system, in said coagulative precipitation tank, add said coagulating agent;
First intermediate pool through said micro-polluted raw purification system cushions the water outlet of said coagulative precipitation tank;
Through the service pump of said micro-polluted raw purification system, promote the water outlet of said first intermediate pool;
Through the BAF of said micro-polluted raw purification system, microvesicle aeration, biological degradation, oxidation adsorption filtration are carried out in the water outlet of said first intermediate pool;
Second intermediate pool through said micro-polluted raw purification system cushions the water outlet of said BAF;
Through the sterilizing unit of said micro-polluted raw purification system, in the water outlet of said BAF, add sterilizing agent;
Filtration lift pump through said micro-polluted raw purification system promotes the water outlet of said second intermediate pool;
Flocculation dosing unit through said micro-polluted raw purification system adds flocculation agent in the water outlet of said second intermediate pool;
Through the more medium filter of said micro-polluted raw purification system, suspended substance, colloid in the water outlet of said second intermediate pool of filtering;
Through the filtration with manganese sand device of said micro-polluted raw purification system, reduce manganese, iron ion content in the water outlet of said more medium filter;
Through the activated charcoal filter of said micro-polluted raw purification system, reach the reverse osmosis unit influent quality requirement of said micro-polluted raw purification system after impurity such as the peculiar smell in the water outlet of the said filtration with manganese sand device of adsorption filtration, colourity, organism and the reduction removal chlorine residue;
Through the sour chemicals dosing plant of said micro-polluted raw purification system, reduce the pH value of the water outlet of said activated charcoal filter;
Scale inhibitors chemicals dosing plant through said micro-polluted raw purification system adds Scale inhibitors in the water outlet of said activated charcoal filter;
Through the mixing tank of said micro-polluted raw purification system, in the water outlet of said activated charcoal filter, said sour chemicals dosing plant is mixed with the medicine that said Scale inhibitors chemicals dosing plant adds;
Through said reverse osmosis unit, separate inorganic salt, residual organic substances, ammonia nitrogen (ionic state NH in the water outlet of tackling said activated charcoal filter
4 +), impurity such as total nitrogen, total phosphorus form fresh water and dense water;
Through the alkali chemicals dosing plant of said micro-polluted raw purification system, improve the suitable pH value of pH value to human body of the said fresh water of said reverse osmosis unit;
Through the sterilizing unit and the ultraviolet sterilization apparatus of said micro-polluted raw purification system, the sterilization that carries out disinfection forms domestic water to the said fresh water of said reverse osmosis unit.
As the further improvement of such scheme, said micro-polluted raw purification system also comprises air-blast device, and said micro-polluted raw purifying method is further comprising the steps of:
Through the said air-blast device of said micro-polluted raw purification system, send into bottom, the water inlet of said coagulative precipitation tank and the microporous aeration device inlet mouth of said BAF of air to said stripping oil trap.
As the further improvement of such scheme, said micro-polluted raw purification system also comprises high-order dense water tank, and said micro-polluted raw purifying method is further comprising the steps of:
Through the high-order dense water tank of said micro-polluted raw purification system, utilize the said dense water of said reverse osmosis unit that said more medium filter, said filtration with manganese sand device, said activated charcoal filter are washed.
Compared with prior art, the advantage of micro-polluted raw purification system provided by the invention and purifying method thereof is: technical process is equipped with rationally, and the impact adaptive faculty that raw water quality is changed is strong; The process combination science; Principal pollutant elder generation emphasis is removed, passed through reverse osmosis technology again, and r-o-pre-treatment design fully as safety control; Make the whole system operating safety stable; Greatly reduce dirty stifled phenomenon occurrence frequency, the matting cycle is prolonged greatly, the water recovery utilization rate is up to 75%.That this Technology is accomplished is energy-conservation, economize on water, be easy to robotization control, applicable to municipal administration, rural area, industrial enterprise, mining site drinking water treatment occasion or need the middle water reuse occasion of advanced treatment.
Description of drawings
The structural representation of the micro-polluted raw purification system that Fig. 1 provides for preferred embodiments of the present invention.
Fig. 2 is the schema of the micro-polluted raw purifying method of micro-polluted raw purification system among Fig. 1.
Fig. 3 is the stripping oil trap of micro-polluted raw purification system among Fig. 1 and the structural representation of coagulative precipitation tank.
Fig. 4 is the structural representation of the BAF of micro-polluted raw purification system among Fig. 1.
Fig. 5 is the structural representation of the pretreatment filters (more medium filter, filtration with manganese sand device, activated charcoal filter) of micro-polluted raw purification system among Fig. 1.
Fig. 6 is the structural representation of the reverse osmosis unit of micro-polluted raw purification system among Fig. 1.
Fig. 7 is the structural representation of the chemically-cleaning device of micro-polluted raw purification system among Fig. 1.
Nomenclature
Stripping oil trap 10
First intermediate pool 31
Second intermediate pool 33
More medium filter 36
Filtration with manganese sand device 37
Acid chemicals dosing plant 39
Scale inhibitors chemicals dosing plant 310
Alkali chemicals dosing plant 312
Air-blast device 314
Chemically-cleaning device 60
Swash plate 141,253
Water leg 251,410
Water distributing area 255
Under filter cap 430
Distribution endless tube 435
Single hole menbrane aerator 436
Security personnel's strainer 51
Reverse osmosis membrane assembly 53
High-order dense water tank 90
Flushing water pump 62
Filter rinsed 63
Working shaft 80
Clean inlet A
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Please consult Fig. 1 and Fig. 2 in the lump, the structural representation of the micro-polluted raw purification system that it provides for preferred embodiments of the present invention.The micro-polluted raw purification system is to water, surface water, pit water under micro-polluted; Especially receive organism, nitrogen, phosphorus, hydrogen sulfide, iron, manganese, fluorochemical, petroleum-type pollution and the bigger former water of total hardness and carry out the technology that purifying treatment is a tap water, can be the user tap water that meets national hygiene standard for drinking water is provided.
The micro-polluted raw purification system comprises stripping oil trap 10; Coagulative precipitation tank 20; Coagulation dosing unit 30; First intermediate pool 31; Service pump 32; BAF 40; Second intermediate pool 33; Flocculation dosing unit 34; Filter lift pump 35; More medium filter 36; Filtration with manganese sand device 37; Activated charcoal filter 38; Acid chemicals dosing plant 39; Scale inhibitors chemicals dosing plant 310; Mixing tank 311; Reverse osmosis unit 50; Alkali chemicals dosing plant 312; Sterilizing unit 313; Air-blast device 314; Chemically-cleaning device 60; Produce water tank 70 and ultraviolet sterilization apparatus 315.
Stripping oil trap 10 is used for the non-oil in water emulsion of micro-polluted raw is separated from said micro-polluted raw; Coagulative precipitation tank 20 is used for pathogeny biology, colloid, the Fe with the water outlet of stripping oil trap 10
3+, suspended substance is gathered into flocs unit and therefrom separates the phosphorus in the said flocs unit planar water under the flocculation of coagulating agent, bridging action; First intermediate pool 31 is used to cushion the water outlet of coagulative precipitation tank 20; Service pump 32 is used to promote the water outlet of first intermediate pool 31 and makes its bottom from BAF 40 get into BAF 40; BAF 40 is used to carry out microvesicle aeration, biological degradation, adsorption and oxidation filtration; Second intermediate pool 33 is used to cushion the water outlet of BAF 40; Filtering the water outlet that lift pump 35 is used to promote second intermediate pool 33 gets into its top from more medium filter 36; Flocculation dosing unit 34 is used for flocculation agent is added in the water outlet of second intermediate pool 33; More medium filter 36 is used for suspended substance, the colloid of the water outlet of filtering second intermediate pool 33; Filtration with manganese sand device 37 is used for reducing manganese, the iron ion content of the water outlet of more medium filter 36; Activated charcoal filter 38 is used for reaching reverse osmosis unit 50 influent quality requirements after chlorine residue is removed in impurity such as the peculiar smell, colourity, organism of the water outlet of adsorption filtration filtration with manganese sand device 37 and reduction; Acid chemicals dosing plant 39 is used to reduce the pH value of the water outlet of activated charcoal filter 38; Scale inhibitors chemicals dosing plant 310 is used for adding Scale inhibitors in the water outlet of activated charcoal filter 38; Mixing tank 311 is used in the water outlet of activated charcoal filter 38 sour chemicals dosing plant 39 being mixed with the medicine that Scale inhibitors chemicals dosing plant 310 adds; Reverse osmosis unit 50 is used for separating inorganic salt, residual organic substances, ammonia nitrogen (the ionic state NH of the water outlet of tackling activated charcoal filter 38
4 +), impurity such as total nitrogen, total phosphorus; Alkali chemicals dosing plant 312 is used to improve the suitable pH value of pH value to human body of the water outlet of reverse osmosis unit 50; The water outlet of sterilizing unit 313 and 315 pairs of reverse osmosis units 50 of the ultraviolet sterilization apparatus sterilization that carries out disinfection forms domestic water; Air-blast device 314 is used to send into the bottom of air to stripping oil trap 10, the bottom of coagulative precipitation tank 20 and the middle part of BAF 40; In this embodiment, air-blast device 314 adopts all gas blower or the backwash blower fan that communicates with the middle part of the bottom of the bottom of stripping oil trap 10, coagulative precipitation tank 20 and BAF 40; Chemically-cleaning device 60 utilizes the water outlet of reverse osmosis unit 50 that BAF 40, more medium filter 36, filtration with manganese sand device 37, activated charcoal filter 38 are washed.
Please combine Fig. 3, stripping oil trap 10 is separated into first subpool 12, second subpool 14 and rectification subpool 16 successively.Offer between first subpool 12 and second subpool 14 and make first channel 120, the second subpools 14 that first subpool 12 communicates with second subpool 14 offer the second passage 140 that second subpool 14 is communicated with rectification subpool 16 with bottom between the rectification subpool 16.Be provided with in first subpool 12 in water distributor 121 and mud drainage slot 123, the second subpools 14 and be provided with some swash plates that are parallel to each other 141 and oil scupper 142.Mud drainage slot 142 is distributed in the bottom in first subpool 12, is used for getting rid of said micro-polluted raw sedimentary foreign material in first subpool 12; Water distributor 121 is evenly distributed on the body bottom, pond in first subpool 12; Be used for said micro-polluted raw is uniformly distributed in first subpool 12; The bottom of said first subpool also is provided with pre-exposure tracheae (figure does not show), and said preaeration pipe is used for said micro-polluted raw is carried out preaeration; Swash plate 141 evenly spaced apart in second subpool 14 the middle part and be positioned at first channel 120 times; Swash plate 141 favours the wall of second subpool 14; And first channel 120 and second passage 140 are positioned at the two ends of swash plate 141, and swash plate 141 is used for the non-oil in water emulsion of said micro-polluted raw is separated from said micro-polluted raw; Oil scupper 142 is arranged on the top of second subpool 14, and oil scupper 142 opens and shuts off through draining valve control.
Said micro-polluted raw is removed sandstone through the eddy flow grit water separator earlier from elevated the back by drowned pump, sends into high-order raw water box and stores up temporarily.Raw water box water outlet flow by gravity is gone into stripping oil trap 12; Wherein be uniformly distributed in the body bottom, pond of first subpool 12 by water distributor 121; Earlier former water is carried out preaeration, when pending water flowed into last part technology through swash plate 141, swash plate 141 layered structuries and aeration effect made the non-oil in water emulsion in the water more be prone to desorption and from water, separate; The elaioleucite that gathers utilizes buoyancy to be collected to the water surface along moving on the swash plate face, forms oil slick.Oil slick is regularly opened draining valve by operator and is got rid of from oil scupper 142.The pending water of process oil removing carries out oxidation with some reducing substanceses in the water under the effect of preaeration, play certain effect of coagulating that helps.Like Fe
2+Be oxidized to Fe
3+↓ colloid is removed it through follow-up depositing technology again.The stripping effect of preaeration can be with hydrogen sulfide removal.
The top of coagulative precipitation tank 20 is provided with water inlet 21; Water inlet 21 is used to receive the water outlet of the rectification subpool 16 of stripping oil trap 10; The bottom of coagulative precipitation tank 20 is provided with mud drainage slot 22, and coagulative precipitation tank 20 is separated into some flocculation reaction subpools 23 (in this embodiment be that example carry out illustrated in greater detail with three flocculation reaction subpools 23), rectification subpool 24 and deposition subpool 25 successively.
The middle part of each flocculation reaction subpool 23 is provided with flocculation reaction case 230, and rectification subpool 24 is provided with the partition wall 240 perpendicular to its bottom, and partition wall 240 is divided into two parts with the lower section of rectification subpool 24.The top of deposition subpool 25 is provided with water leg 251, and the middle part of deposition subpool 25 is provided with evenly some swash plates 253 spaced apart, and the bottom of deposition subpool 25 is set to water distributing area 255.The water outlet of stripping oil trap 10 gets in the flocculation reaction subpool 23 through water inlet 21 carries out flocculation reaction, gets into rectification subpool 24 again and carries out rectification buffering, uniform water distribution, gets into deposition subpool 25 at last and carries out mud-water separation.
The pending water (being the water outlet of stripping oil trap 10) of removing oils flows into grid reaction pond (being coagulative precipitation tank 20) certainly; In the first segment mesh pond (is flocculation reaction subpool 23; With the second following segment mesh pond, the 3rd segment mesh pond) in agitaion mixes by the air bubble that blasts (utilizing air-blast device 314) with the coagulating agent of coagulation dosing unit 30 inputs; Again from flowing through second section and the 3rd segment mesh; Under the waterpower turbulent flow condition of setting, the pathogeny biology in the pending water, colloid, Fe
3+, suspended substance is gathered into the macrobead flocs unit under the flocculation of coagulating agent, bridging action, the phosphorus in flocs unit and the planar water is distributed in tube settler water distribution zone (promptly precipitating the water distributing area 255 of subpool 25) uniformly after the rectification canal is regulated waterpower.The flocs unit of this moment has formed fine and close macrobead; Proportion is bigger, when pending water is upwards flowed through inclined tube (being swash plate 253), because flocs unit is under action of gravity; And because the inclined tube structure forms extremely short waterpower settling height and enough low waterpower upflow velocity; Make flocs unit more be prone to, be prone to the fast inclined tube surface that falls to, slide to the mud drainage slot 22 at the bottom of the pond again along the inclined tube surface, regularly by outside the manual work discharge pond.The primary water of having removed most suspended substance, total phosphorus and part iron, manganese then upwards is collected to clear water zone (promptly precipitating the top of subpool 25), after water leg 251 is collected, flows into first intermediate pool 31.Reduce to below the 10NTU through clarifying pending water chaotic degree.
In this embodiment, the some swash plates 141 in the stripping oil trap 10 and structure, the shape of the some swash plates 253 in the coagulative precipitation tank 20 are basic identical, and its difference is: thickness between the two, some difference of spacing.Generally, some swash plates 141 thickness ranges in the stripping oil trap 10 are: 1～2mm, and the distance between plates scope is: 35～100mm; The thickness range of the some swash plates 253 in the coagulative precipitation tank 20 is: 0.5～2.0mm, the distance between plates scope is: 25～50mm.In other embodiments, swash plate 253 can also adopt the hexagon cellular inclined tube.
Please combine Fig. 4; Following three zones 41,42,43 during BAF 40 is arranged to; Lower area 43 is provided with water distributor (figure does not show) for water distributing area and in the bottom; Middle zone 42 is provided with microporous aeration device for biological packing area and in the bottom, last zone 41 is provided with water leg 410 for the receipts pool and at the top.The pending water of first intermediate pool 31 promotes through BAF service pump (being service pump 32) and gets into from BAF 40 bottoms; Distribute following filter cap 430, filter bar 431, upward filtration cap 432, the filter plate 433 that upwards passes through said microporous aeration device from water distributing area successively through said water distributor, get into the biologic packing material district then.Bottom in the biologic packing material district; The air that air-blast device 314 is sent into carries out the microvesicle aeration for each single hole menbrane aerator 436 through 435 uniformly distributings of distribution endless tube; Airborne oxygen is dissolved in the pending water efficiently; On biologic packing material, enclose a large amount of mikrobes admittedly, organism in the pending water of nationality and oxygen carry out metabolism and the breeding of self, have a kind of nitrifier in this biological flora simultaneously; With nitrated one-tenth nitrate salt of the ammonia nitrogen in the pending water or nitrite, thereby make pending water obtain biological degradation and purify; Biological flora also plays solid phosphorus effect simultaneously.Competent oxygen amount also can be carried out oxidation with the iron in the pending water, manganese in the BAF 40, generates the insolubles colloid of iron, manganese and is tackled by filtrate.The pore texture that the biologic packing material district forms and the adsorption of filter material surface can be tackled the suspended substance in the pending water, can reduce the opacity in the water outlet.Impurity such as suspended substance of tackling in the bacteria bed and deactivated mikrobe corpse then mix flushing by regular BAF 40 air waters discharges outside the pond, makes bacteria bed recover to cut dirty function.Up-flow pending waterborne through purifying goes into to receive the pool, collects from flowing into second intermediate pool 33 through water leg 410.
Please combine Fig. 5; The pending water of second intermediate pool 33 is through filtering lift pump 35 to 0.35～0.45MPa; And go into more medium filter 36 tops after utilizing flocculation dosing unit 34 to add flocculation agent (PAC) and sterilizing unit 313 adding sterilizing agents; Suspended substance, colloid in the pending water of filter bed filtering of hard coal and silica sand composition, the filter bottom water outlet gets into filtration with manganese sand device 37, and (manganese content is (with MnO to utilize natural manganese sand
2Meter) be not less than 35% natural manganese sand filtrate) the filter bed catalysed oxidn formed; Further reduce manganese, iron ion content in the pending water; Pending water behind demanganization, the iron gets into activated charcoal filter 38, reaches reverse osmosis unit 50 influent qualities after impurity such as the peculiar smell in the pending water of adsorption filtration, colourity, organism and the reduction removal chlorine residue and requires---SDI
15＜4.The pressure difference of stopping up filter bed to water-in and water outlet when the foul of each strainer interception reaches 0.03～0.05Mpa or effluent quality should switch the backwash that respective valves is carried out filter bed when defective.
Please combine Fig. 6, reverse osmosis unit 50 comprises security personnel's strainer 51, HPP 52 and the reverse osmosis membrane assembly 53 that connects successively.Activated charcoal filter 38 water outlet nationality overbottom pressure (0.25～0.35MPa) and the hydrochloric acid that adds with medicine system (being sour chemicals dosing plant 39, Scale inhibitors chemicals dosing plant 310) and Scale inhibitors security personnel's strainer 51 of after line mixer 311 mixes, getting into reverse osmosis unit 50; Hold back the granule foreign that possibly cause damage to the reverse osmosis membrane of reverse osmosis membrane assembly 53, security personnel's strainer 51 filter element filtering precision are 1um～5um; 51 water outlets of security personnel's strainer get into reverse osmosis membrane assembly 53 after HPP 52 boosts to 0.8～1.7MPa, the separation of the reverse osmosis membrane of process reverse osmosis membrane assembly 53, the most of inorganic salt in the pending water, residual organic substances, ammonia nitrogen (ionic state NH
4 +), impurity such as total nitrogen, total phosphorus all separate by interception, only contain a spot of inorganic salt etc. and see through in the pure water (accounting for pending water～75%) of reverse osmosis membrane, form fresh water and dense water respectively.Said fresh water through alkali chemicals dosing plant 312 add alkali regulate pH to human body suitable about 7.3 after; Add sterilizing agent through sterilizing unit 313 again and carry out disinfection, final specification product water (water-quality guideline is superior to " drinking water sanitary standard " GB5749-2006) flows in the stainless steel product water tank 70 and stores.Produce water tank 70 and the disinfection reactions time is provided.Product water flows into ultraviolet sterilizer 315 through rising pipe and sterilizes once more, guarantees qualified, the water supply security of hygiology index, supplies with the user by working shaft 80 again and uses.
Reverse osmosis concentrated shrink (being the dense water of reverse osmosis unit 50) utilizes higher surplus pressure to send into high-order dense water tank 90; Partly water (accounting for pending flooding quantity～25%) water quality is limpid for this; Opacity is lower than 1NTU; Remain the more excellent clear water of quality, can be with its backwash water source as pre-treatment tertiary filter (being more medium filter 36, filtration with manganese sand device 37, activated charcoal filter 38).High-order dense water tank 90 highly satisfies the required head of filter backwash, and (0.1～0.2MPa), volume satisfies 10～15 minutes required water yields of a strainer back flushing at least.The pre-treatment tertiary filter all adopts air water to mix the mode of cleaning, and the backwash source of the gas is provided by BAF 40 backwash blower fans.BAF 40 can be washed through BAF backwashing pump 432 by second intermediate pool 33, also can utilize reverse osmosis concentrated shrink to wash.
Please combine Fig. 7, when reverse osmosis unit 50 reaches the condition that needs matting (such as, the water production rate of device descended 5～10% o'clock than first or last cleaning back; When doubling after the salt transmitance of device was cleaned than first or last time; During the difference of pressure difference or pressure difference of installing each section 1～1.5 times after for first or last the cleaning; The device operation is in the time of 3-4 month; Device is before the long-term row of stopping transport is with the formaldehyde solution protection etc.), should utilize 60 pairs of reverse osmosis units of chemically-cleaning device 50 to carry out matting.Chemically-cleaning device 60 comprises matting water tank 61, flushing water pump 62 and filter rinsed 63; Matting water tank 62 adopts reverse osmosis unit 50 isolating fresh water to prepare matting solution; In cleaning solution to the filter rinsed 63 that flushing water pump 62 promotes in the matting water tank 60, filter rinsed 63 is connected in the cleaning inlet A of reverse osmosis unit 50.
Characteristics of the present invention have:
1, suitable pollutant kind scope is wide; Strong shock resistance to source of pollution; Process combination according to earlier targetedly emphasis remove principal pollutant, strengthen the r-o-preconditioning technique simultaneously, the high efficiency separation ability by the reverse osmosis membrane of reverse osmosis unit 50 makes the qualified water outlet of safety at last;
2, adopt BAF 40 as one of the main purifying treatment of this technology unit, can effectively prevent organism, iron, manganese colloid block up the dirt that follow-up deep purifying unit causes;
3, adopt and to add acid solution to regulate feed water by reverse osmosis pH be 6.0～7.1, increase into dirty substance dissolves degree, gaseous matter in the water such as NH
3Change NH into
4 +, can be removed by reverse osmosis membrane; And add high efficiency scale inhibitor special again, and be dispersed into dirty particulate; Two kinds of medicaments that add can prevent effectively that the dense water side of reverse osmosis concentrated water side, particularly latter end reverse osmosis membrane from producing concentration polarization and the scale effect membrane flux, increase operating pressure, the unfavorable phenomenon of waste electric energy;
4, adopt first aeration stripping inclined plate grease, the technology of coagulating sedimentation is as the pre-treatment of BAF again; Prevent that hydrogen sulfide, oils, arsenic, suspended substance from producing dirty stifled to the bio-carrier of BAF 40; And prevent that it from suppressing microbial growth, reaches chemistry, biological phosphate-eliminating and nitrogen ammonia nitrification simultaneously;
5, reverse osmosis high-pressure pump (being flushing water pump 62) adopts VFC, requires to regulate the best WP of reverse osmosis unit according to different inflow temperatures, water production rate, reaches the saves energy purpose;
6,40 water outlets add sterilant to BAF; Prevent that the mikrobe that contains in BAF 40 water outlets from causing microbial contamination to follow-up filter bed; And through activated charcoal filter 38 chlorine residue is reduced again, prevent that chlorine residue from causing oxidation to destroy to the reverse osmosis membrane of follow-up polyamide compoiste material;
7, collected the backwash water of reverse osmosis concentrated shrink as pretreatment filters (being more medium filter 36, filtration with manganese sand device 37, activated charcoal filter 38); And utilize the big characteristics of reverse osmosis concentrated water overbottom pressure; Can directly dense water be sent into high-order dense water tank 90; The volume of high-order dense water tank 90 is by satisfying 10～15 minutes required water yields of a strainer back flushing at least; High-order dense water tank 90 highly satisfy the required head of filter backwash (0.1～0.2MPa), thus save the filter backwash water pump, realize saving water and energy, practicing thrift the purpose of investment, convenient operating maintenance;
8, this Technology can be carried out the process combination adjustment to the contained pollutant kind of former water, when not containing iron, manganese, hydrogen sulfide, petroleum-type like former water pollutant, can cancel stripping oil trap 10 and filtration with manganese sand device 37;
9, the pre-treatment tertiary filter all adopts air water to mix the mode of cleaning, and makes backwash thoroughly clean more, saves the backwash water loss, and the backwash source of the gas is provided by BAF 40 backwash blower fans.
Application implementation example below in conjunction with this Technology is helped in the Nepal servant hospital domestic water system in China is described in detail the present invention.
Because no surface water is desirable, former water is 200 meters well water that deep-well is got up from the locality, and said engineering influent quality is seen table 1.
Table 1 influent quality
| Project name | Unit | Water inlet | Remarks | Project name | Unit | Water inlet | Remarks |
| CODcr | mg/L | 42.6 | Total hardness (in lime carbonate) | mg/L | 174 | ||
| Permanganate indices | mg/L | 15 | PH value | 6.54 | |||
| Iron | mg/L | 13.4 | Copper | mg/L | ＜0.04 | ||
| Manganese | mg/L | 0.81 | Zinc | mg/L | 0.07 | ||
| Ammonia nitrogen | mg/ |
40 | Vitriol | mg/L | 4 | ||
| Petroleum-type | mg/L | 2.32 | Muriate | mg/L | 5 | ||
| Total nitrogen | mg/L | 51.9 | Fluorochemical | mg/L | 0.89 | ||
| Total phosphorus | mg/L | 7.83 | Arsenic | mg/L | 0.00674 | ||
| Selenium | mg/L | ＜0.00025 | Prussiate | mg/L | ＜0.002 | ||
| Mercury | mg/L | 0.00054 | Nitrate nitrogen (in ammonia) | mg/L | 0.22 | ||
| Cadmium | mg/L | 0.0013 | Volatile phenol | mg/L | ＜0.002 |
After said engineering water inlet process micro-polluted raw purification system of the present invention and purifying method thereof purify, can obtain Pollutant Treatment effect prediction table as shown in table 2.
Table 2 Pollutant Treatment effect prediction table
In the operating process of reality, said engineering water inlet makes the Drinking Water that meets " drinking water sanitary standard " GB5749-2006 through (promptly purifying the back through micro-polluted raw purification system of the present invention and purifying method thereof) after the water purification facilities.
Table 3 is seen in this engineering effluent quality and hygienical evaluation report:
Table 3 Hefei City disease prevention and control center's examining report
In sum, advantage of the present invention is: technical process is equipped with rationally, and the impact adaptive faculty that raw water quality is changed is strong; The process combination science is removed principal pollutant elder generation emphasis, passes through reverse osmosis technology again as safety control; And r-o-pre-treatment design fully, makes the whole system operating safety stable, greatly reduces dirty stifled phenomenon occurrence frequency; The matting cycle is prolonged greatly, and the water recovery utilization rate is up to 75%.That this Technology is accomplished is energy-conservation, economize on water, be easy to robotization control, applicable to municipal administration, rural area, industrial enterprise, mining site drinking water treatment occasion or need the middle water reuse occasion of advanced treatment.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. micro-polluted raw purification system; It is characterized in that; It comprises stripping oil trap, coagulative precipitation tank, coagulation dosing device, first intermediate pool, service pump, BAF, second intermediate pool, flocculation dosing unit, filters lift pump, more medium filter, filtration with manganese sand device, activated charcoal filter, sour chemicals dosing plant, Scale inhibitors chemicals dosing plant, mixing tank, reverse osmosis unit, alkali chemicals dosing plant, sterilizing unit and ultraviolet sterilization apparatus; Wherein
Said stripping oil trap is used for the non-oil in water emulsion of micro-polluted raw is separated from said micro-polluted raw;
Said coagulative precipitation tank is used for the colloid of the water outlet of said stripping oil trap, Fe
3+, suspended substance is gathered into flocs unit and therefrom separates under the flocculation of coagulating agent, bridging action, the phosphorus in the water is removed in said flocs unit absorption;
Said coagulation dosing unit is used for adding said coagulating agent toward said coagulative precipitation tank;
Said first intermediate pool is used to cushion the water outlet of said coagulative precipitation tank;
Said service pump is used to promote the water outlet of said first intermediate pool and its bottom from said BAF is got into;
Said BAF is used to carry out microvesicle aeration, biological degradation, oxidation adsorption filtration;
Said second intermediate pool is used to cushion the water outlet of said BAF;
Said filtration lift pump, the water outlet that is used to promote said second intermediate pool gets into its top from said more medium filter;
Said flocculation dosing unit is used for flocculation agent is added in the water outlet of said second intermediate pool;
Said more medium filter is used for suspended substance, the colloid of the water outlet of said second intermediate pool of filtering;
Said filtration with manganese sand device is used for reducing manganese, the iron ion content of the water outlet of said more medium filter;
Said activated charcoal filter reaches the requirement of said reverse osmosis unit influent quality after chlorine residue is removed in impurity such as peculiar smell, colourity, organism and the reduction that is used for the water outlet of the said filtration with manganese sand device of adsorption filtration;
Said sour chemicals dosing plant is used to reduce the pH value of the water outlet of said activated charcoal filter;
Said Scale inhibitors chemicals dosing plant is used for adding Scale inhibitors in the water outlet of said activated charcoal filter;
Said mixing tank is used in the water outlet of said activated charcoal filter said sour chemicals dosing plant being mixed with the medicine that said Scale inhibitors chemicals dosing plant adds;
Said reverse osmosis unit is used for separating inorganic salt, residual organic substances, ammonia nitrogen (the ionic state NH of the water outlet of tackling said activated charcoal filter
4 +), impurity such as total nitrogen, total phosphorus form fresh water and dense water;
Said alkali chemicals dosing plant is used to improve the suitable pH value of pH value to human body of the said fresh water of said reverse osmosis unit;
The sterilization that carries out disinfection forms domestic water to the said fresh water of said reverse osmosis unit for said sterilizing unit and said ultraviolet sterilization apparatus, and said sterilizing unit also adds sterilizing agent to the water outlet of said BAF.
2. a kind of micro-polluted raw purification system as claimed in claim 1; It is characterized in that; Said stripping oil trap is separated into first subpool, second subpool and rectification subpool successively, offers first channel between said first subpool and said second subpool, and the bottom between said second subpool and the said rectification subpool offers second passage; Be provided with water distributor, pre-exposure tracheae and mud drainage slot in said first subpool; Be provided with some swash plates that are parallel to each other and oil scupper in said second subpool, wherein
Said mud drainage slot is distributed in the bottom in said first subpool, is used for getting rid of said micro-polluted raw sedimentary foreign material in said first subpool,
Said water distributor is evenly distributed on the body bottom, pond in said first subpool, is used for said micro-polluted raw is uniformly distributed in first subpool;
Said pre-exposure tracheae is arranged on the bottom of said first subpool, is used for said micro-polluted raw is carried out preaeration;
Said some swash plates evenly spaced apart in said second subpool the middle part and be positioned under the said first channel; Said some swash plates favour the wall of said second subpool; And said first channel and said second passage are positioned at the two ends of said some swash plates, and said some swash plates are used for the non-oil in water emulsion of said micro-polluted raw is separated from said micro-polluted raw;
Said oil scupper is arranged on the top of said second subpool.
3. a kind of micro-polluted raw purification system as claimed in claim 1; It is characterized in that; The coagulating agent mixed aeration pipe that the top of said coagulative precipitation tank is provided with the water inlet of the water outlet that is used to receive said stripping oil trap and is used for being connected with said coagulation dosing unit, the bottom of said coagulative precipitation tank is provided with mud drainage slot, and said coagulative precipitation tank is separated into some flocculation reaction subpools, rectification subpool and deposition subpool successively; Wherein, The middle part of each flocculation reaction subpool is provided with the flocculation reaction case, and said rectification subpool is provided with the partition wall perpendicular to its bottom, and said partition wall is divided into two parts with the lower section of said rectification subpool; The top of said deposition subpool is provided with water leg; The middle part of said deposition subpool is provided with evenly some swash plates spaced apart, and the bottom of said deposition subpool is set to water distributing area, and the water outlet of said stripping oil trap mixes in the said some flocculation reaction subpools of back entering through said water inlet and with coagulating agent that said coagulating agent chemicals dosing plant adds carries out flocculation reaction; Get into said rectification subpool again and carry out rectification buffering, uniform water distribution, get into said deposition subpool at last and carry out mud-water separation.
4. a kind of micro-polluted raw purification system as claimed in claim 1; It is characterized in that; Following three zones during said BAF is arranged to; Said lower area is water distributing area and is provided with water distributor in the bottom, said in the zone be provided with microporous aeration device for biological packing area and in the bottom, the said zone of going up is for receiving the pool and being provided with water leg at the top.
5. a kind of micro-polluted raw purification system as claimed in claim 1; It is characterized in that; Said micro-polluted raw purification system also comprises air-blast device; Be used to send into air to said stripping oil trap, said coagulative precipitation tank and said BAF, said air-blast device adopts gas blower or the backwash blower fan that all communicates with said stripping oil trap, said coagulative precipitation tank and said BAF.
6. a kind of micro-polluted raw purification system as claimed in claim 1; It is characterized in that; Said micro-polluted raw purification system also comprises the high-order dense water tank that communicates with said reverse osmosis unit and be used to receive said dense water; The height of the dense water tank of a said high position is greater than the height of said more medium filter, said filtration with manganese sand device, said activated charcoal filter; Said elevated tank all is connected with said more medium filter, said filtration with manganese sand device, said activated charcoal filter, utilizes the water outlet of said elevated tank that said more medium filter, said filtration with manganese sand device, said activated charcoal filter are washed.
7. a kind of micro-polluted raw purification system as claimed in claim 1; It is characterized in that; Said micro-polluted raw purification system also comprises the chemically-cleaning device that is used for said reverse osmosis unit reverse-osmosis membrane element matting; Said chemically-cleaning device comprises matting water tank, flushing water pump and filter rinsed; Said matting water tank adopts the isolating said fresh water of said reverse osmosis unit to prepare matting solution, and said flushing water pump promotes in said cleaning solution to the said filter rinsed in the said cleaning water tank, and said strainer is connected in the cleaning inlet of said reverse osmosis unit.
8. micro-polluted raw purifying method, it is applied to it is characterized in that as in any described micro-polluted raw purification system in the claim 1 to 7 it may further comprise the steps:
Through the stripping oil trap of said micro-polluted raw purification system, the non-oil in water emulsion in the micro-polluted raw is separated from said micro-polluted raw;
Through the coagulative precipitation tank of said micro-polluted raw purification system, with the colloid in the water outlet of said stripping oil trap, Fe
3+, suspended substance is gathered into flocs unit and therefrom separates the phosphorus in the said flocs unit planar water under the flocculation of coagulating agent, bridging action;
Through the coagulation dosing unit of said micro-polluted raw purification system, in said coagulative precipitation tank, add said coagulating agent;
First intermediate pool through said micro-polluted raw purification system cushions the water outlet of said coagulative precipitation tank;
Through the service pump of said micro-polluted raw purification system, promote the water outlet of said first intermediate pool;
Through the BAF of said micro-polluted raw purification system, microvesicle aeration, biological degradation, oxidation adsorption filtration are carried out in the water outlet of said first intermediate pool;
Second intermediate pool through said micro-polluted raw purification system cushions the water outlet of said BAF;
Through the sterilizing unit of said micro-polluted raw purification system, in the water outlet of said BAF, add sterilizing agent;
Filtration lift pump through said micro-polluted raw purification system promotes the water outlet of said second intermediate pool;
Flocculation dosing unit through said micro-polluted raw purification system adds flocculation agent in the water outlet of said second intermediate pool;
Through the more medium filter of said micro-polluted raw purification system, suspended substance, colloid in the water outlet of said second intermediate pool of filtering;
Through the filtration with manganese sand device of said micro-polluted raw purification system, reduce manganese, iron ion content in the water outlet of said more medium filter;
Through the activated charcoal filter of said micro-polluted raw purification system, reach the reverse osmosis unit influent quality requirement of said micro-polluted raw purification system after impurity such as the peculiar smell in the water outlet of the said filtration with manganese sand device of adsorption filtration, colourity, organism and the reduction removal chlorine residue;
Through the sour chemicals dosing plant of said micro-polluted raw purification system, reduce the pH value of the water outlet of said activated charcoal filter;
Scale inhibitors chemicals dosing plant through said micro-polluted raw purification system adds Scale inhibitors in the water outlet of said activated charcoal filter;
Through the mixing tank of said micro-polluted raw purification system, in the water outlet of said activated charcoal filter, said sour chemicals dosing plant is mixed with the medicine that said Scale inhibitors chemicals dosing plant adds;
Through said reverse osmosis unit, separate inorganic salt, residual organic substances, ammonia nitrogen (ionic state NH in the water outlet of tackling said activated charcoal filter
4 +), impurity such as total nitrogen, total phosphorus form fresh water and dense water;
Through the alkali chemicals dosing plant of said micro-polluted raw purification system, improve the suitable pH value of pH value to human body of the said fresh water of said reverse osmosis unit;
Through the sterilizing unit and the ultraviolet sterilization apparatus of said micro-polluted raw purification system, the sterilization that carries out disinfection forms domestic water to the said fresh water of said reverse osmosis unit.
9. micro-polluted raw purifying method as claimed in claim 8 is characterized in that, said micro-polluted raw purification system also comprises air-blast device, and said micro-polluted raw purifying method is further comprising the steps of:
Through the said air-blast device of said micro-polluted raw purification system, send into bottom, the water inlet of said coagulative precipitation tank and the microporous aeration device inlet mouth of said BAF of air to said stripping oil trap.
10. micro-polluted raw purifying method as claimed in claim 8 is characterized in that, said micro-polluted raw purification system also comprises high-order dense water tank, and said micro-polluted raw purifying method is further comprising the steps of:
Through the high-order dense water tank of said micro-polluted raw purification system, utilize the said dense water of said reverse osmosis unit that said more medium filter, said filtration with manganese sand device, said activated charcoal filter are washed.
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| CN115385516A (en) * | 2021-05-25 | 2022-11-25 | 南京溧水水务集团有限公司 | Water quality purification system and method |
| CN113429041A (en) * | 2021-06-23 | 2021-09-24 | 中石化宁波工程有限公司 | Water purification treatment system with double water sources for water supply |
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Application publication date: 20120711 |