CN104445747B - A kind of composite wastewater process for reclaiming of garbage incinerating power plant - Google Patents

A kind of composite wastewater process for reclaiming of garbage incinerating power plant Download PDF

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CN104445747B
CN104445747B CN201410812387.0A CN201410812387A CN104445747B CN 104445747 B CN104445747 B CN 104445747B CN 201410812387 A CN201410812387 A CN 201410812387A CN 104445747 B CN104445747 B CN 104445747B
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sewage
pool
connects
treatment
pipeline
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CN104445747A (en
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王昕彤
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China First Heavy Industries Co Ltd
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China First Heavy Industries Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The invention discloses a kind of garbage incinerating power plant composite wastewater process for reclaiming, comprise the following steps: production waste pre-treatment, flue gas Wastewater Pretreatment, sanitary sewage pre-treatment, percolate pre-treatment; Reverse osmosis advanced process; Processed.The present invention carries out double oxygen, aerobic treatment by after percolate and sanitary sewage mixing, effectively can reduce COD, NH in percolate 3-N, the ratio of balanced dirty water pollutant, mixed solution biochemical is better, and effluent quality is better.Percolate after pretreated factory effluent, biochemical treatment and sanitary sewage are carried out combined depth process by the present invention, only need a set for the treatment of unit, expense of reducing investment outlay.The present invention adopts sewage combination treatment, effectively can reduce the COD entered in the sewage of reverse osmosis system, heavy metal ion content, can effectively alleviate reverse osmosis membrane blockage problem, reduces matting frequency, extends reverse osmosis membrane work-ing life.

Description

A kind of composite wastewater process for reclaiming of garbage incinerating power plant
Technical field
The present invention relates to a kind of composite wastewater process for reclaiming of garbage incinerating power plant, belong to technical field of sewage.
Background technology
In recent years, along with the raising of China's urban development and economic level, living standards of the people improve gradually, and domestic waste calorific value raises gradually.Enter stove refuse thermal value and reach 5000kJ/kg, possess the condition of burning disposal completely.And the service experience in other cities domestic shows, adopt burning disposal domestic refuse to be feasible, and there is considerable economic benefit.
Garbage incinerating power plant stain disease mainly comprises: refuse chute percolate, boiler blowdown water, circulating cooling system sewerage, workshop sewer, wet flue gas process waste water, sanitary sewage etc., current most of garbage burning factory is by above classification of waste process, discharges after reaching discharging standards.The domestic and international patent about garbage burning factory composite wastewater process for reclaiming and technical literature also do not find so far.
In the stain disease of garbage burning factory, the percolate containing a large amount of high density chemical oxygen demand (COD) (COD) is one of waste water that current international intractability is larger.CalaceN., LiberatoriA., PetronioB.M. wait at " Characteristicsofdifferentmolecularweightfractionsoforga nicmatterinlandfillleachateandtheirroleinsoilsorptionofh eavymetals [J] .Environ.Pollut " (" characteristic of the different organic pollutant of refuse landfill and the effect of heavy metal contaminants in soil ") [2001,113 (3): 331-339] this has been special discussion.In general, its pH value is between 4 ~ 9, and COD is between 20000 ~ 80000mg/L, and BOD5 is between 10000 ~ 35000mg/L, and NH3-N is from 500 ~ 1500mg/L, and heavy metal concentration is higher.The improvement of percolate become China current and from now on quite over a long time environment pollution control key subjects (Dai Jinguo, Song Qianwu, Wang Hongyu, Wang Yanjie:. " China's landfill leachate treatment Problems and countermeasures is analyzed " [J]. environmental engineering, 2011, S1:185-188).
Application number is 201110260937.9 and is called " a kind of percolate and excrement and urine water combination treatment method ", two kinds of waste water are mixed after pre-treatment, again through biochemical treatment+membrane separation+reverse osmosis advanced process, water outlet meets the primary standard requirement of GB8978-1996 " integrated wastewater discharge standard ".But percolate and excrement and urine water all belong to high organic polluting water, outlet water organic substance content through biochemical treatment still remains high, such sewage enters reverse osmosis system, the problem such as there will be that reverse osmosis membrane blocking is serious, matting frequency is high, film work-ing life is short.
Application number is 201110443600.1 " working method of a kind of garbage burning factory percolate and municipal effluent merging treatment ", also do not deal with problems well, due to the process of municipal effluent carbon N∶P ratio suitable micro-organisms, and the carbon concentration of percolate is higher, ammonia nitrogen concentration is lower, lacks phosphorus, so percolate is joined in municipal effluent, carbon N∶P ratio can be caused to lack of proper care, have a strong impact on treatment effect, make water outlet not up to standard.
Summary of the invention
In order to overcome above-mentioned technical deficiency, the object of the present invention is to provide a kind of composite wastewater process for reclaiming of garbage incinerating power plant, this inventive method can reduce the intractability of percolate, improve the rate of recovery and the work-ing life of reverse osmosis unit, reduce the quantity of wastewater effluent of garbage burning factory simultaneously.
The technical solution adopted for the present invention to solve the technical problems is: a kind of garbage incinerating power plant composite wastewater process for reclaiming, comprises the following steps:
One, pre-treatment
Pre-treatment comprises production waste pre-treatment, flue gas Wastewater Pretreatment, sanitary sewage pre-treatment and leachate pretreatment;
(1), production waste pre-treatment
First boiler blowdown water, circulating cooling system sewerage, workshop sewer is entered the pump well one near boiler, cooling tower, workshop, sewage collecting pool A is promoted to by submersible sewage pump, by lift pump, sewage is squeezed into coagulation basin one again and carry out coagulating, then tubular membrane is utilized to carry out solid-liquid separation, remove suspended solid and impurity, enter intermediate pool by the sewage of tubular membrane, do not enter dense water collecting tank by the sewage of tubular membrane;
(2), flue gas Wastewater Pretreatment
Flue gas waste water is introduced sewage collecting pool two through pump well two, by adding in alkali and flue gas waste water in Neutralization settlement pond, and make the most of heavy metal in waste water form throw out, by lift pump, sewage is squeezed into coagulation basin two again, in coagulation basin two, add coagulating agent make that throw out is concentrated becomes mud, then utilize tubular membrane to carry out solid-liquid separation, remove suspended solid and impurity, enter intermediate pool by the waste water of tubular membrane, do not enter dense water collecting tank by the waste water of tubular membrane;
(3), sanitary sewage pre-treatment
Common sanitary sewage is introduced sewage collecting pool three through grid one, then utilizes lift pump sanitary sewage to be delivered to oxygen compatibility pool and carry out denitrification process; Enter through the sewage of nitration treatment the membrane bioreactor (MBR) be made up of Aerobic Pond and external placed type Ultra filtration membrane system to process, the clear water after process enters intermediate pool, and dense water section is back to oxygen compatibility pool, and remainder drains into dense water collecting tank;
(4), percolate pre-treatment
First percolate is entered equalizing tank after grid two processes, then enter coagulation basin three and preliminary sedimentation tank, to remove macrobead foreign material, and precipitation removes most suspended substance; Then percolate is introduced anaerobic pond, the various complicated organic molecule in percolate is changed into methane and carbon dioxide, finally the percolate being completed anaerobic reaction by anaerobic pond is introduced oxygen compatibility pool and carry out denitrification process; Enter through the sewage of nitration treatment the membrane bioreactor (MBR) be made up of Aerobic Pond and external placed type Ultra filtration membrane system to process, the clear water after process enters intermediate pool, and dense water section is back to oxygen compatibility pool, and remainder drains into dense water collecting tank;
Two, reverse osmosis advanced process
The sewage entered in intermediate pool introduces reverse osmosis advanced treatment system through topping-up pump, described reverse osmosis advanced treatment system comprises cartridge filter, high-pressure pump and reverse osmosis membrane, in reverse osmosis advanced treatment system, under the driving of pressure, except water molecules, in water, other ions and the organism overwhelming majority are trapped within dense water side, are trapped in the concentrate recirculation of dense water side to intermediate pool, by the freshwater storage of reverse osmosis membrane in fresh water reuse tank, be directly used in production;
Three, processed
Sewage in dense water collecting tank, through coagulating kinetics, then enter dewatering unit dehydration through lift pump, the clear water deviate from is back to intermediate pool and proceeds process, sludge quality water ratio after dehydration is less than 60%, landfill disposal or send aerobic compost factory to carry out compost.
The material of tubular membrane of the present invention is organic polyvinylidene difluoride (PVDF), polysulfones, polyethersulfone, polypropylene or inorganic ceramic.
Tubular membrane film bore of the present invention is 5-20mm.
The fenestra aperture of tubular membrane of the present invention is 20 ~ 200nm.
In sewage collecting pool one of the present invention, diving mixing device is housed, to be mixed by sewage.
Described flue gas waste water of the present invention is the waste water that wet flue gas process produces.
In sewage collecting pool three of the present invention, diving mixing device is housed, to be mixed by sewage.
Anaerobic pond of the present invention installs flow lifting type anaerobic biological reactor.
The Water Sproading rate of reverse osmosis advanced Processing System Design of the present invention is 60% ~ 90%, and the ratio of desalinization selecting reverse osmosis membrane is more than 99%.
Principal facility of the present invention and equipment comprise: sewage collecting pool one, sewage collecting pool two, sewage collecting pool three, coagulation basin one, coagulation basin two, tubular membrane, intermediate pool, percolate equalizing tank, flow lifting type anaerobe (UASB) reactor, oxygen compatibility pool (A section), membrane bioreactor (MBR), reverse osmosis advanced treatment system (RO) and filter-pressing device etc.Wherein sewage collecting pool one, sewage collecting pool two, sewage collecting pool three, coagulation basin one, coagulation basin two, intermediate pool, percolate equalizing tank, flow lifting type anaerobic biological reactor (UASB), oxygen compatibility pool, Aerobic Pond adopt skeleton construction, Anti-seeping technology is done in reaction tank outside, and WATER REPELLENT is done in inside;
Its order of connection of comprehensive sewage treating device is: point four tunnels connect: first via sanitary sewage: pump well one connects sewage collecting pool one by pipeline, sewage collecting pool one connects coagulation basin one by pipeline, coagulation basin one is by connecting pipe of pipeline formula film, tubular membrane connects intermediate pool by pipeline one tunnel, tubular membrane connects dense water collecting tank by another road of pipeline, and dense water collecting tank connects dewatering unit by pipeline; Second road flue gas sewage: pump well two-way piping connects sewage collecting pool two, sewage collecting pool two-way piping connects Neutralization settlement pond, and Neutralization settlement pond connects coagulation basin two by pipeline, and coagulation basin two-way piping connects tubular membrane; 3rd road sanitary sewage: grid one connects sewage collecting pool three by pipeline, sewage collecting pool threeway piping connects oxygen compatibility pool, oxygen compatibility pool connects Aerobic Pond by pipeline, Aerobic Pond connects external placed type Ultra filtration membrane system by pipeline, external placed type Ultra filtration membrane system one tunnel connects intermediate pool, another road connects dense water collecting tank, and intermediate pool connects reverse osmosis advanced treatment system, and reverse osmosis advanced treatment system connects fresh water reuse tank; 4th road refuse leachate: grid two-way piping connects equalizing tank, equalizing tank connects coagulation basin three, and coagulation basin three connects preliminary sedimentation tank, and preliminary sedimentation tank connects anaerobic pond, and anaerobic pond connects oxygen compatibility pool.
Concrete treatment step of the present invention is as follows:
1, first boiler blowdown water, circulating cooling system sewerage, workshop sewer enter the pump well near boiler, cooling tower, workshop, sewage collecting pool one is promoted to by submersible sewage pump, then by lift pump, sewage is squeezed into coagulation basin one, NaOH, polyaluminium sulfate is added in coagulation basin one, utilize the abundant stirring reaction of agitator, then utilize lift pump to send into tubular membrane 4 and carry out solid-liquid separation, remove suspended solid and impurity, the water outlet SS of film is 0mg/L, the producing water ratio of film is 95%, film water outlet enters intermediate pool, and dense water enters dense water collecting tank.
2, flue gas waste water, enters sewage collecting pool two, by adding Ca (OH) in neutralization tank 2in and flue gas waste water, and make the most of heavy metal in waste water form throw out, add organic sulfide and make most of heavy metal form throw out, FeClSO in coagulation basin B10 4make precipitation concentration become mud, then utilize tubular membrane to carry out solid-liquid separation, remove suspended solid and impurity, the water outlet SS of film is 0mg/L, and the producing water ratio of film is 95%, and film water outlet enters intermediate pool, and dense water enters dense water collecting tank.
3, the sewage of the sanitary sewage of common living drainage through grid one, toilet through septic tank, dining room is after oil trap air supporting pre-treatment, enters sewage collecting pool three, then utilizes lift pump pump to the oxygen compatibility pool of percolation liquid treating system.
4, percolate is first through grid two, coagulation basin three, preliminary sedimentation tank, to remove macrobead foreign material.Landfill leachate treatment water, after grid two, removes most suspended substance with coagulating sedimentation.Then enter anaerobic pond, anaerobic reaction adopts flow lifting type anaerobic biological reactor (UASB), and sewage is from bottom to top by flow lifting type anaerobic biological reactor (UASB).Have a high density, highly active Sludge Bed bottom UASB, the majority of organic pollutants in sewage is degraded to methane and carbon dioxide through anaerobically fermenting here.Because of the stirring of current and bubble, on UASB, there is a sludge suspension layer.UASB top is provided with triphase separator, in order to be separated nitrated gas, nitrification liquid and mud granule.Nitrated gas is derived from UASB top; The automatic landing of mud granule is settled down to bottom UASB; Digestive system is from settling section water outlet.Anaerobic sludge concentration can reach 20 ~ 30g/L, and the volumetric loading of chemical oxygen demand is 25 ~ 35kg/m 3d.In anaerobic pond, the clearance of COD can reach 60 ~ 70%, and anaerobic pond water outlet enters double oxygen (A section)+Membrane Bioreactor for Wastewater Treatment system (MBR).
5, oxygen compatibility pool (A section)+membrane bioreactor (MBR) process will be proceeded through pretreated sanitary sewage and percolate.This section is made up of oxygen compatibility pool (A section) and membrane bioreactor (MBR) system, be called for short A+MBR system, MBR system comprises aerobic biochemical conversion zone and external placed type Ultra filtration membrane system, due to the interception capacity that Ultra filtration membrane system is superpower, MBR system has activated sludge concentration far above common biochemical system and mud age, in the present invention, A+MBR systemic organic contaminants is removed and is removed the main place of ammonia nitrogen.The feature that A+MBR system parameter is chosen is, oxygen compatibility pool dissolved oxygen concentration is less than 0.5mg/L, MBR system sludge concentration can reach 10 ~ 15g/L, Aerobic Pond dissolved oxygen concentration 2 ~ 4mg/L, higher mixed liquid recycle ratio (can more than 20Q be reached) and less COD, ammonia nitrogen loading (generally not higher than 0.04kgNH3-N/kgMLSSd).A+MBR system can remove nitrate, nitrite, the organism of more than 95%, and the ultra-filtration membrane water outlet after process enters intermediate pool, and dense water section is back to oxygen compatibility pool, and remainder drains into dense water collecting tank.
6, the sewage in intermediate pool enters reverse osmosis advanced treatment system through topping-up pump, and adopt one-level two-piece design, producing water ratio 80%, ratio of desalinization 99.5%, organic removal rate is greater than 95%.Through the water direct reuse of reverse osmosis advanced treatment system process in flushing the toilet, between cleaning Vehicle, greening, fire-fighting, dry method flue gas process etc., concentrate recirculation continues process to intermediate pool.
7, the sewage in dense water collecting tank, add the coagulating agent such as alkali, PAC and carry out coagulating, then enter plate-and-frame filter press through lift pump, filtrate is back to intermediate pool 5 and proceeds process, and the mud (water ratio is less than 70%) after dehydration send aerobic compost factory to carry out compost.
The invention has the beneficial effects as follows:
1, the present invention carries out double oxygen, aerobic treatment by after percolate and sanitary sewage mixing, and effectively can reduce COD, NH3-N in percolate, the ratio of balanced dirty water pollutant, mixed solution biochemical is better, and effluent quality is better;
2, the percolate after pretreated factory effluent, biochemical treatment and sanitary sewage are carried out combined depth process by the present invention, only need a set for the treatment of unit, expense of reducing investment outlay;
3, the present invention adopts sewage combination treatment, effectively can reduce the COD entered in the sewage of reverse osmosis system, heavy metal ion content, can effectively alleviate reverse osmosis membrane blockage problem, extends matting frequency, film work-ing life.
4, the water after process of the present invention meets requirement, GB/T18920-2002 " the urban sewage reutilization urban reclaimed water water quality " requirement of GB16889-2008 " household refuse landfill sites Environmental capacity standard ", can be back to flush the toilet, between cleaning Vehicle, greening, fire-fighting, dry method flue gas process etc.
5, the present invention effectively reduces the quantity of wastewater effluent more than 60% of garbage burning factory, realizes the target of industrial water saving.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
In figure: 1, pump well one, 2, sewage collecting pool one, 3, coagulation basin one, 4, tubular membrane, 5, intermediate pool, 6, dense water collecting tank, 7, pump well two, 8, sewage collecting pool two, 9, Neutralization settlement pond, 10, coagulation basin two, 11, grid one, 12, sewage collecting pool three, 13, grid two, 14, equalizing tank, 15, coagulation basin three, 16, preliminary sedimentation tank, 17, anaerobic pond, 18, oxygen compatibility pool, 19, Aerobic Pond, 20, external placed type Ultra filtration membrane system, 21, reverse osmosis advanced treatment system, 22, fresh water reuse tank, 23, dewatering unit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
As shown in Figure 1, principal facility of the present invention and equipment comprise: sewage collecting pool 1, sewage collecting pool 28, sewage collecting pool 3 12, coagulation basin 1, coagulation basin 2 10, tubular membrane 4, intermediate pool 5, percolate equalizing tank 14, flow lifting type anaerobe (UASB) reactor, oxygen compatibility pool 18(A section), membrane bioreactor (MBR), reverse osmosis advanced treatment system 21(RO) and filter-pressing device etc.Wherein sewage collecting pool 1, sewage collecting pool 28, sewage collecting pool 3 12, coagulation basin 1, coagulation basin 2 10, intermediate pool 5, percolate equalizing tank 14, flow lifting type anaerobic biological reactor (UASB), oxygen compatibility pool 18, Aerobic Pond 19 adopt skeleton construction, Anti-seeping technology is done in reaction tank outside, and WATER REPELLENT is done in inside;
Its order of connection of comprehensive sewage treating device is: point four tunnels connect: first via sanitary sewage: pump well 1 connects sewage collecting pool 1 by pipeline, sewage collecting pool 1 connects coagulation basin 1 by pipeline, coagulation basin 1 is by connecting pipe of pipeline formula film 4, tubular membrane 4 connects intermediate pool 5 by pipeline one tunnel, tubular membrane 4 connects dense water collecting tank 6 by another road of pipeline, and dense water collecting tank 6 connects dewatering unit 23 by pipeline; Second road flue gas sewage: pump well 27 connects sewage collecting pool 28 by pipeline, sewage collecting pool 28 connects Neutralization settlement pond 9 by pipeline, and Neutralization settlement pond 9 connects coagulation basin 2 10 by pipeline, and coagulation basin 2 10 is by connecting pipe of pipeline formula film 4; 3rd road sanitary sewage: grid 1 connects sewage collecting pool 3 12 by pipeline, sewage collecting pool 3 12 connects oxygen compatibility pool 18 by pipeline, oxygen compatibility pool 18 connects Aerobic Pond 19 by pipeline, Aerobic Pond 19 connects external placed type Ultra filtration membrane system 20 by pipeline, external placed type Ultra filtration membrane system 20 1 tunnel connects intermediate pool 5, another road connects dense water collecting tank 6, and intermediate pool 5 connects reverse osmosis advanced treatment system 21, and reverse osmosis advanced treatment system 21 connects fresh water reuse tank 22; 4th road refuse leachate: grid 2 13 connects equalizing tank 14 by pipeline, and equalizing tank 14 connects coagulation basin 3 15, coagulation basin 3 15 connects preliminary sedimentation tank 16, and preliminary sedimentation tank 16 connects anaerobic pond 17, and anaerobic pond 17 connects oxygen compatibility pool 18.
Membrane module in described tubular membrane 4 can select the HyperFlux series of tubular hyperfiltration membrane assembly of German BERGHOF company, the pollution-resistant brackish water film that the reverse osmosis membrane in reverse osmosis unit can select the company such as Hydranautics, beautiful, the Tao Shi in east to produce.
Filter-pressing device can select plate-and-frame filter press or other form pressure filter.
Concrete treatment step of the present invention is as follows:
1, first boiler blowdown water, circulating cooling system sewerage, workshop sewer enter the pump well near boiler, cooling tower, workshop, sewage collecting pool 1 is promoted to by submersible sewage pump, then by lift pump, sewage is squeezed into coagulation basin 1, NaOH, polyaluminium sulfate is added in coagulation basin 1, utilize the abundant stirring reaction of agitator, then utilize lift pump to send into tubular membrane 4 and carry out solid-liquid separation, remove suspended solid and impurity, the water outlet SS of film is 0mg/L, the producing water ratio of film is 95%, film water outlet enters intermediate pool 5, and dense water enters dense water collecting tank 6.
2, flue gas waste water, enters sewage collecting pool 28, by adding Ca (OH) in neutralization tank 2in and flue gas waste water, and make the most of heavy metal in waste water form throw out, add organic sulfide and make most of heavy metal form throw out, FeClSO in coagulation basin B10 4make precipitation concentration become mud, then utilize tubular membrane 4 to carry out solid-liquid separation, remove suspended solid and impurity, the water outlet SS of film is 0mg/L, and the producing water ratio of film is 95%, and film water outlet enters intermediate pool 5, and dense water enters dense water collecting tank 6.
3, the sewage of the sanitary sewage of common living drainage through grid 1, toilet through septic tank, dining room is after oil trap air supporting pre-treatment, enters sewage collecting pool 3 12, then utilizes lift pump pump to the oxygen compatibility pool 18 of percolation liquid treating system.
4, percolate is first through grid 2 13, coagulation basin 3 15, preliminary sedimentation tank 16, to remove macrobead foreign material.Landfill leachate treatment water, after grid 2 13, removes most suspended substance with coagulating sedimentation.Then enter anaerobic pond 17, anaerobic reaction adopts flow lifting type anaerobic biological reactor (UASB), and sewage is from bottom to top by flow lifting type anaerobic biological reactor (UASB).Have a high density, highly active Sludge Bed bottom UASB, the majority of organic pollutants in sewage is degraded to methane and carbon dioxide through anaerobically fermenting here.Because of the stirring of current and bubble, on UASB, there is a sludge suspension layer.UASB top is provided with triphase separator, in order to be separated nitrated gas, nitrification liquid and mud granule.Nitrated gas is derived from UASB top; The automatic landing of mud granule is settled down to bottom UASB; Digestive system is from settling section water outlet.Anaerobic sludge concentration can reach 20 ~ 30g/L, and the volumetric loading of chemical oxygen demand is 25 ~ 35kg/m 3d.In anaerobic pond 17, the clearance of COD can reach 60 ~ 70%, and anaerobic pond 17 water outlet enters double oxygen (A section)+Membrane Bioreactor for Wastewater Treatment system (MBR).
5, oxygen compatibility pool 18(A section will be proceeded through pretreated sanitary sewage and percolate)+membrane bioreactor (MBR) process.This section is by oxygen compatibility pool 18(A section) and membrane bioreactor (MBR) system form, be called for short A+MBR system, MBR system comprises aerobic biochemical conversion zone and external placed type Ultra filtration membrane system 20, due to the interception capacity that Ultra filtration membrane system is superpower, MBR system has activated sludge concentration far above common biochemical system and mud age, in the present invention, A+MBR systemic organic contaminants is removed and is removed the main place of ammonia nitrogen.The feature that A+MBR system parameter is chosen is, oxygen compatibility pool 18 dissolved oxygen concentration is less than 0.5mg/L, MBR system sludge concentration can reach 10 ~ 15g/L, Aerobic Pond 19 dissolved oxygen concentration 2 ~ 4mg/L, higher mixed liquid recycle ratio (can more than 20Q be reached) and less COD, ammonia nitrogen loading (generally not higher than 0.04kgNH3-N/kgMLSSd).A+MBR system can remove nitrate, nitrite, the organism of more than 95%, and the ultra-filtration membrane water outlet after process enters intermediate pool 5, and dense water section is back to oxygen compatibility pool 18, and remainder drains into dense water collecting tank 6.
6, the sewage in intermediate pool 5 enters reverse osmosis advanced treatment system 21 through topping-up pump, and adopt one-level two-piece design, producing water ratio 80%, ratio of desalinization 99.5%, organic removal rate is greater than 95%.The water direct reuse processed through reverse osmosis advanced treatment system 21 in flushing the toilet, between cleaning Vehicle, greening, fire-fighting, dry method flue gas process etc., concentrate recirculation processes to intermediate pool 5 continuation.
7, the sewage in dense water collecting tank 6, add the coagulating agent such as alkali, PAC and carry out coagulating, then enter plate-and-frame filter press through lift pump, filtrate is back to intermediate pool 5 and proceeds process, and the mud (water ratio is less than 70%) after dehydration send aerobic compost factory to carry out compost.

Claims (6)

1. a garbage incinerating power plant composite wastewater process for reclaiming, is characterized in that: comprise the following steps:
One, pre-treatment
Pre-treatment comprises production waste pre-treatment, flue gas Wastewater Pretreatment, sanitary sewage pre-treatment and leachate pretreatment;
(1), production waste pre-treatment
First boiler blowdown water, circulating cooling system sewerage, workshop sewer is entered the pump well one (1) near boiler, cooling tower, workshop, sewage collecting pool one (2) is promoted to by submersible sewage pump, by lift pump, sewage is squeezed into coagulation basin one (3) again and carry out coagulating, then tubular membrane (4) is utilized to carry out solid-liquid separation, remove suspended solid and impurity, enter intermediate pool (5) by the sewage of tubular membrane (4), do not enter dense water collecting tank (6) by the sewage of tubular membrane (4);
(2), flue gas Wastewater Pretreatment
Flue gas waste water is introduced sewage collecting pool two (8) through pump well two (7), by adding in alkali and flue gas waste water in Neutralization settlement pond (9), and make the most of heavy metal in waste water form throw out, by lift pump, sewage is squeezed into coagulation basin two (10) again, in coagulation basin two (10), add coagulating agent make that throw out is concentrated becomes mud, then tubular membrane (4) is utilized to carry out solid-liquid separation, remove suspended solid and impurity, intermediate pool (5) is entered by the waste water of tubular membrane (4), do not enter dense water collecting tank (6) by the waste water of tubular membrane (4),
(3), sanitary sewage pre-treatment
Common sanitary sewage is introduced sewage collecting pool three (12) through grid one (11), then utilizes lift pump sanitary sewage to be delivered to oxygen compatibility pool (18) and carry out denitrification process; Enter through the sewage of nitration treatment the membrane bioreactor be made up of Aerobic Pond (19) and external placed type Ultra filtration membrane system (20) to process, clear water after process enters intermediate pool (5), dense water section is back to oxygen compatibility pool (18), and remainder drains into dense water collecting tank (6);
(4), percolate pre-treatment
First percolate is entered equalizing tank (14) after grid two (13) processes, then enter coagulation basin three (15) and preliminary sedimentation tank (16), to remove macrobead foreign material, and precipitation removes most suspended substance; Then percolate is introduced anaerobic pond (17), various complicated organic molecule in percolate is changed into methane and carbon dioxide, finally the percolate being completed anaerobic reaction by anaerobic pond (17) is introduced oxygen compatibility pool (18) and carry out denitrification process; Enter through the sewage of nitration treatment the membrane bioreactor be made up of Aerobic Pond (19) and external placed type Ultra filtration membrane system (20) to process, clear water after process enters intermediate pool (5), dense water section is back to oxygen compatibility pool (18), and remainder drains into dense water collecting tank (6);
Two, reverse osmosis advanced process
The sewage entered in intermediate pool (5) introduces reverse osmosis advanced treatment system (21) through topping-up pump, described reverse osmosis advanced treatment system (21) comprises cartridge filter, high-pressure pump and reverse osmosis membrane, in reverse osmosis advanced treatment system (21), under the driving of pressure, except water molecules, in water, other ions and the organism overwhelming majority are trapped within dense water side, be trapped in the concentrate recirculation of dense water side to intermediate pool (5), by the freshwater storage of reverse osmosis membrane in fresh water reuse tank (22), be directly used in production;
Three, processed
Sewage in dense water collecting tank (6), through coagulating kinetics, then dewatering unit (23) dehydration is entered through lift pump, the clear water deviate from is back to intermediate pool (5) and proceeds process, sludge quality water ratio after dehydration is less than 60%, landfill disposal or send aerobic compost factory to carry out compost.
2. a kind of garbage incinerating power plant composite wastewater process for reclaiming according to claim 1, is characterized in that: described tubular membrane (4) film bore is 5-20mm.
3. a kind of garbage incinerating power plant composite wastewater process for reclaiming according to claim 1, is characterized in that: the fenestra aperture of described tubular membrane (4) is 20 ~ 200nm.
4. a kind of garbage incinerating power plant composite wastewater process for reclaiming according to claim 1, is characterized in that: respectively diving mixing device is housed in described sewage collecting pool one (2) and sewage collecting pool three (12).
5. a kind of garbage incinerating power plant composite wastewater process for reclaiming according to claim 1, is characterized in that: described anaerobic pond (17) installs flow lifting type anaerobic biological reactor.
6. a kind of garbage incinerating power plant composite wastewater process for reclaiming according to claim 1, it is characterized in that: its order of connection of comprehensive sewage treating device is: point four tunnels connect: first via sanitary sewage: pump well one (1) connects sewage collecting pool one (2) by pipeline, sewage collecting pool one (2) connects coagulation basin one (3) by pipeline, coagulation basin one (3) is by connecting pipe of pipeline formula film (4), tubular membrane (4) connects intermediate pool (5) by pipeline one tunnel, tubular membrane (4) connects dense water collecting tank (6) by another road of pipeline, dense water collecting tank (6) connects dewatering unit (23) by pipeline, second road flue gas sewage: pump well two (7) connects sewage collecting pool two (8) by pipeline, sewage collecting pool two (8) connects Neutralization settlement pond (9) by pipeline, Neutralization settlement pond (9) connects coagulation basin two (10) by pipeline, and coagulation basin two (10) is by connecting pipe of pipeline formula film (4), 3rd road sanitary sewage: grid one (11) connects sewage collecting pool three (12) by pipeline, sewage collecting pool three (12) connects oxygen compatibility pool (18) by pipeline, oxygen compatibility pool (18) connects Aerobic Pond (19) by pipeline, Aerobic Pond (19) connects external placed type Ultra filtration membrane system (20) by pipeline, external placed type Ultra filtration membrane system (20) one tunnel connects intermediate pool (5), another road connects dense water collecting tank (6), intermediate pool (5) connects reverse osmosis advanced treatment system (21), reverse osmosis advanced treatment system (21) connects fresh water reuse tank (22), 4th road refuse leachate: grid two (13) connects equalizing tank (14) by pipeline, equalizing tank (14) connects coagulation basin three (15), coagulation basin three (15) connects preliminary sedimentation tank (16), and preliminary sedimentation tank (16) connects anaerobic pond (17), and anaerobic pond (17) connects oxygen compatibility pool (18).
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