CN109133421B - A kind of advanced treatment of wastewater recycling system - Google Patents

A kind of advanced treatment of wastewater recycling system Download PDF

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Publication number
CN109133421B
CN109133421B CN201811108674.8A CN201811108674A CN109133421B CN 109133421 B CN109133421 B CN 109133421B CN 201811108674 A CN201811108674 A CN 201811108674A CN 109133421 B CN109133421 B CN 109133421B
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China
Prior art keywords
water
connect
membrane
desalination
pipeline
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CN109133421A (en
Inventor
张立伟
张明锐
赵玉东
张利珍
徐忠良
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Inner Mongolia Xing'an Silver And Lead Smelting Co Ltd
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Inner Mongolia Xing'an Silver And Lead Smelting 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • 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
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • 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
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • 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
    • C02F1/5281—Installations for water purification using chemical agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/06—Pressure conditions
    • C02F2301/066—Overpressure, high pressure
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y02A20/131—Reverse-osmosis

Abstract

The invention discloses a kind of advanced treatment of wastewater recycling systems, including press filtration unit, ultra filtration unit, nano-filtration unit, reverse osmosis units and sea water desalination unit, the press filtration unit, ultra filtration unit, nano-filtration unit and reverse osmosis units are sequentially connected by pipeline；The sea water desalination unit includes No. 1 sea water desalination unit and No. 2 sea water desalination units, No. 1 sea water desalination unit is connect by pipeline with the concentrated water of the reverse osmosis membrane, and No. 2 sea water desalination units are connect by pipeline with the concentrated water of the nanofiltration membrane.The invention has the benefit that realizing the innoxious and recycling of concentrated water in nanofiltration and reverse osmosis units, while processing cost is low, it is truly realized the zero-emission of sewage, reduces the waste of water resource, avoids pollution of the smelting wastewater to environment.

Description

A kind of advanced treatment of wastewater recycling system
Technical field
The invention belongs to sewage treatment fields, and in particular to a kind of advanced treatment of wastewater recycling system.
Background technique
In recent years, with the continuous development of Chinese society economy, metallurgy industry is grown rapidly, metallurgical industry water Amount increases also with continuous, becomes water consumption rich and influential family.
Currently, the work of smelting sewage reuse has been carried out in domestic many non-ferrous metal metallurgy enterprises, largely adopt With traditional processing technique, such as coagulating sedimentation, air bearing, filtering, but because of smelting sewage complicated component, after traditional handicraft is handled Water cannot be removed effectively pollutant therein, be unable to meet production with water requirement, limit the range of reuse, it is most of up to standard Discharge.Therefore, recycle-water can be made to meet each using effective advanced treatment process for the water quality condition of pollutant discharge of enterprise water It is final to realize recycling for water resource with the requirement of water spot.This demand promotes the hair of water treatment technology that is more, updating Exhibition.
In recent years, with the raising of country and local sewage drainage standard, membrane separation technique is increasingly becoming petrochemical industry, electricity The one preferred technique of industrial wastewater and recirculated water advanced treating in the industries such as power, metallurgy.Currently, common film in deep purification of waste water Mainly there are four class microfiltration membranes, ultrafiltration membrane, nanofiltration membrane, reverse osmosis membrane, the driving force of these four films during the separation process is pressure, Under pressure solvent and part solute can be through film and remaining component is trapped, they constitute one it is separable from from Son arrives the membrane separating process of particle.
CN101041485A discloses a kind of metal smelting factory sewage reclaiming method based on membrane filtration technique, including following Step: 1) sewage of energy qualified discharge adds water treatment coagulant after coagulation handles metallurgical works, makes the colloid in sewage Coagulation forms alumen ustum.2) sand filtration is filtered: the sewage after coagulation being filtered by sandfiltration pot, except consolidating for the bulky grain in decontaminated water The impurity such as body suspended matter, colloid.3) fabric filter element filters: will be filtered through the filtered sewage of sand filtration by fabric filter element, into one Step removes the suspended matter and lesser impurity in water body.4) ultra-filtration filters: ultrafiltration will be entered through the filtered sewage pump of fabric filter element System filtering, removes the substances such as small suspended matter, organic matter and bacterium, obtains ultrafiltration dialysis liquid and concentrate.5) nanofiltration is (or anti- Infiltration) filtering: the dialyzate after ultra-filtration filters is pumped into the filtering of nanofiltration (or reverse osmosis) system with booster pump, is gone in water removal Heavy metal, calcium ion plasma obtain nanofiltration (or reverse osmosis) dialyzate and concentrate.6) it the processing of concentrate: by ultrafiltration and receives The merging of concentrate obtained by filter (or reverse osmosis) is stored in sink, is discharged after lime coagulation precipitates, which uses membranous system Sewage treatment is carried out, reuse requirement is realized, reduces production cost, improve the utilization rate of water resource, but the invention is simultaneously The a large amount of concentrates not generated to membranous system carry out processing and are effectively treated, and only with discharging after coagulating sedimentation, not only cause water The waste of resource, while also causing greatly to pollute to environment.
CN102476885A discloses a kind of waste water treatment system, including for filtering out the heavy metal in metal smelt waste water Ion and the coagulation module for abolishing high concentration cyanide；For the water outlet of coagulation processing module to be carried out initial concentration, to reach The preprocessing module of reverse osmosis requirement；For carrying out the reverse osmosis module of secondary concentration processing；For carrying out depth concentration Evaporative crystallization module, the invention using evaporative crystallization method to after reverse osmosis treatment remaining concentrated water carry out depth it is net Change and be concentrated, the ion in remaining concentrated water is separated by way of crystallizing into solid, it is higher so as to obtain purity Using water quality, substantially increase recovery utilization rate, but the processing cost of the concentrated water is higher, be difficult to enterprise and received.
Application of membrane separation technology has become a kind of trend in the advanced treating of smelting wastewater, and reverse osmosis, nanofiltration by It is compact-sized in its, occupied area is small, safe operation, Yi Shixian automation control and stable effluent quality are reliable, it has also become grind Study carefully the hot spot of application.But membrane separation technique can generate a large amount of concentrated water, wherein contain various organic matters and inorganic pollution, if Direct emission both will cause the serious waste of water resource, can also bring serious pollution.
Summary of the invention
The object of the present invention is to provide a kind of advanced treatment of wastewater recycling systems, by the way that sea water desalination list is arranged Member realizes the innoxious and recycling of concentrated water in nanofiltration and reverse osmosis units, while processing cost is low, is truly realized waste water Zero-emission, reduce the waste of water resource, avoid pollution of the smelting wastewater to environment.
In order to solve the above technical problems, the present invention provides a kind of advanced treatment of wastewater recycling systems, including Press filtration unit, ultra filtration unit, nano-filtration unit, reverse osmosis units and sea water desalination unit, the press filtration unit, ultra filtration unit, Nano-filtration unit and reverse osmosis units are sequentially connected by pipeline.
The press filtration unit includes filter press, sedimentation basin and clear water reserviors, the water outlet of the filter press by pipeline with The sedimentation basin connection, the sedimentation basin are connect with the clear water reserviors.
The ultra filtration unit includes ultrafiltration raw water box, and ultrafiltration raw water pump, bag filter, ultrafiltration membrane and ultrafiltration produce water Case, the ultrafiltration raw water box are connect with the ultrafiltration raw water pump, and the ultrafiltration raw water pump and the bag filter connect It connects, the bag filter connection is connect with the ultrafiltration membrane, and the water outlet of the ultrafiltration membrane passes through pipeline and the ultrafiltration Water producing tank connection.
The nano-filtration unit includes No. 1 raw water pump, No. 1 cartridge filter, No. 1 high-pressure pump, nanofiltration membrane, nanofiltration production water Case, the ultrafiltration water producing tank are connect by No. 1 raw water pump with No. 1 cartridge filter, No. 1 cartridge filter It is connect with No. 1 high-pressure pump, No. 1 high-pressure pump is connect with the nanofiltration membrane, and the water outlet of the nanofiltration membrane is logical Piping is connect with the nanofiltration water producing tank.
The reverse osmosis units include No. 2 raw water pumps, No. 2 cartridge filters, No. 2 high-pressure pumps, reverse osmosis membrane and reuse The water outlet of water tank, the nanofiltration water producing tank is connect by No. 2 raw water pumps with No. 2 cartridge filters, No. 2 guarantors Peace filter is connect with No. 2 high-pressure pumps, and No. 2 high-pressure pumps connection is connect with the reverse osmosis membrane, described The water outlet of reverse osmosis membrane is connect by pipeline with the reuse water tank.
The sea water desalination unit includes No. 1 sea water desalination unit and No. 2 sea water desalination units, No. 1 seawater Desalination unit is connect by pipeline with the concentrated water of the reverse osmosis membrane, and No. 2 sea water desalination units pass through pipeline and institute The concentrated water for the nanofiltration membrane stated connects.
Further, the sedimentation basin is connect with sulfuric acid chemicals dosing plant.
Further, the ultrafiltration raw water box is connect with hydrochloric acid chemicals dosing plant.
Further, the cross-flow water of the ultrafiltration membrane enters aeration tank by pipeline, and the water outlet of the aeration tank is logical Piping enters the filter press.
Further, No. 1 sea water desalination unit includes No. 1 sea water desalination raw water box, No. 3 raw water pumps, No. 3 high pressures Pump, No. 3 cartridge filters and No. 1 sea water desalination membrane, the water outlet of No. 1 sea water desalination raw water box pass through No. 3 originals Water pump is connect with No. 3 cartridge filters, No. 3 cartridge filters and No. 3 high-pressure pump connections, No. 3 height Press pump is connect with No. 1 sea water desalination membrane
Further, No. 1 sea water desalination membrane water outlet by pipeline enter the reuse water tank, described No. 1 The concentrated water of sea water desalination membrane is connect by pipeline with the ultrafiltration raw water box.
Further, No. 2 sea water desalination units include No. 2 sea water desalination raw water boxs, No. 4 raw water pumps, multimedium Filter, No. 4 high-pressure pumps, No. 4 cartridge filters and No. 2 sea water desalination membranes, No. 2 sea water desalination raw water boxs and described No. 4 raw water pump connections, No. 4 raw water pumps connection are connect with the more medium filter, the more medium filter Water outlet connect with No. 4 cartridge filters, No. 4 cartridge filters are connect with No. 4 high-pressure pumps, described No. 4 high-pressure pumps and the connection of No. 2 sea water desalination membranes.
Further, the aperture of No. 1 sea water desalination membrane and No. 2 sea water desalination membranes is 0.001-0.0001 μm.
Further, No. 2 sea water desalination membranes water outlet by pipeline enter the reuse water tank, described No. 2 The concentrated water of sea water desalination membrane is connect by pipeline with the flushing cinder pond.
Further, No. 1 cartridge filter, No. 2 cartridge filters, No. 3 cartridge filters and No. 4 security personnel's filterings The water inlet of device adds antisludging agent.
The present invention also provides a kind of above-mentioned advanced treatment of wastewater recycling systems in smelting wastewater advanced treating Application.
Compared with prior art, the beneficial effects of the present invention are:
(1) for the present invention using ultrafiltration, nanofiltration and the reverse osmosis advanced treating for combining progress sewage, effluent quality is good, real The reuse for having showed middle water reduces the waste of water resource, improves water utilization rate.
(2) present invention utilizes sea water desalination unit, handles nanofiltration and reverse osmosis concentrated water, and operating cost is low, meanwhile, it realizes The harmless treatment and resource utilization of concentrated water, reduces the waste of water resource.
(3) investment of the invention is small, stable, is truly realized the zero-emission of sewage, reduces the waste of water resource, The utilization rate for improving water resource avoids pollution of the smelting wastewater to environment, while operating cost is low, wide market.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Fig. 2 is the process flow chart of No. 1 sea water desalination unit.
Fig. 3 is the process flow chart of No. 2 sea water desalination units.
Specific embodiment
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, below in conjunction with Fig. 1-3, to this hair Bright technical solution is described in detail, to facilitate the technical staff to understand.
A kind of advanced treatment of wastewater recycling system, including press filtration unit, it is ultra filtration unit, nano-filtration unit, reverse osmosis Unit and sea water desalination unit, the press filtration unit, ultra filtration unit, nano-filtration unit and reverse osmosis units are successively connected by pipeline It connects.
The press filtration unit includes filter press, sedimentation basin and clear water reserviors, the water outlet of the filter press by pipeline with The sedimentation basin connection, the sedimentation basin are connect with the clear water reserviors.
The ultra filtration unit includes ultrafiltration raw water box, and ultrafiltration raw water pump, bag filter, ultrafiltration membrane and ultrafiltration produce water Case, the ultrafiltration raw water box are connect with the ultrafiltration raw water pump, and the ultrafiltration raw water pump and the bag filter connect It connects, the bag filter connection is connect with the ultrafiltration membrane, and the water outlet of the ultrafiltration membrane passes through pipeline and the ultrafiltration Water producing tank connection；The large particle in waste water is removed by bag filter, meanwhile, it prevents ultrafiltration membrane from blocking, improves ultrafiltration membrane Working efficiency.
The nano-filtration unit includes No. 1 raw water pump, No. 1 cartridge filter, No. 1 high-pressure pump, nanofiltration membrane, nanofiltration production water Case, the ultrafiltration water producing tank are connect by No. 1 raw water pump with No. 1 cartridge filter, No. 1 cartridge filter It is connect with No. 1 high-pressure pump, No. 1 high-pressure pump is connect with the nanofiltration membrane, and the water outlet of the nanofiltration membrane is logical Piping is connect with the nanofiltration water producing tank.
The reverse osmosis units include No. 2 raw water pumps, No. 2 cartridge filters, No. 2 high-pressure pumps, reverse osmosis membrane and reuse The water outlet of water tank, the nanofiltration water producing tank is connect by No. 2 raw water pumps with No. 2 cartridge filters, No. 2 guarantors Peace filter is connect with No. 2 high-pressure pumps, and No. 2 high-pressure pumps connection is connect with the reverse osmosis membrane, described The water outlet of reverse osmosis membrane is connect by pipeline with the reuse water tank.
The sea water desalination unit includes No. 1 sea water desalination unit and No. 2 sea water desalination units, No. 1 seawater Desalination unit is connect by pipeline with the concentrated water of the reverse osmosis membrane, and No. 2 sea water desalination units pass through pipeline and institute The concentrated water for the nanofiltration membrane stated connects.
Further, the sedimentation basin is connect with sulfuric acid chemicals dosing plant.
Further, the ultrafiltration raw water box is connect with hydrochloric acid chemicals dosing plant.
Further, the cross-flow water of the ultrafiltration membrane enters aeration tank by pipeline, and the water outlet of the aeration tank is logical Piping enters the filter press and improves the chelating ability of heavy metal and organic matter in cross-flow water using Air Exposure, will Cross-flow water after aeration returns to press filtration unit, realizes the further removal of heavy metal and organic matter in cross-flow water.
Further, No. 1 sea water desalination unit includes No. 1 sea water desalination raw water box, No. 3 raw water pumps, No. 3 high pressures Pump, No. 3 cartridge filters and No. 1 sea water desalination membrane, the water outlet of No. 1 sea water desalination raw water box pass through No. 3 originals Water pump is connect with No. 3 cartridge filters, No. 3 cartridge filters and No. 3 high-pressure pump connections, No. 3 height Press pump is connect with No. 1 sea water desalination membrane.
Further, No. 1 sea water desalination membrane water outlet by pipeline enter the reuse water tank, described No. 1 The concentrated water of sea water desalination membrane is connect by pipeline with the ultrafiltration raw water box.
Using No. 1 sea water desalination unit by the further concentration of the concentrated water of reverse osmosis units, produces water and be stored in recycle-water Case, realizes the resource and minimizing of concentrated water, while the super concentrated water after concentration is returned to ultrafiltration raw water box, by chemicals dosing plant and Aeration adjusts the chelating ability of heavy metal and organic matter, removes the heavy metal and organic pollutant in concentrated water using press filtration unit, To realize the innoxious of concentrated water.
Further, No. 2 sea water desalination units include No. 2 sea water desalination raw water boxs, No. 4 raw water pumps, multimedium Filter, No. 4 high-pressure pumps, No. 4 cartridge filters and No. 2 sea water desalination membranes, No. 2 sea water desalination raw water boxs and described No. 4 raw water pump connections, No. 4 raw water pumps connection are connect with the more medium filter, the more medium filter Water outlet connect with No. 4 cartridge filters, No. 4 cartridge filters are connect with No. 4 high-pressure pumps, described No. 4 high-pressure pumps and the connection of No. 2 sea water desalination membranes.
Further, No. 2 sea water desalination membranes water outlet by pipeline enter the reuse water tank, described No. 2 The concentrated water of sea water desalination membrane is connect by pipeline with the flushing cinder pond.
The concentrated water of nano-filtration unit is further processed using No. 2 sea water desalination units, realizes being further purified for concentrated water, is produced With reuse water tank, the concentrated water after concentration enters flushing cinder pond for flushing cinder for water storage.
Further, the aperture of No. 1 sea water desalination membrane and No. 2 sea water desalination membranes is 0.001-0.0001 μm； Preferably 0.0005 μm.
Further, No. 1 cartridge filter, No. 2 cartridge filters, No. 3 cartridge filters and No. 4 security personnel's filterings The water inlet of device adds antisludging agent.
The present invention also provides a kind of above-mentioned advanced treatment of wastewater recycling systems in smelting wastewater advanced treating Application.
Smelting wastewater: water 310t/d, hardness < 10mmol/L, SiO2< 20mg/L, iron < 0.1mg/L, pH7-9, chlorine Ion≤2000mg/L.
By smelting wastewater after preaeration, by filter press filters pressing, slag charge is temporarily stored into slag bucket, and filtrate flows into precipitating certainly Pond, the pH value that waste water is adjusted using sulfuric acid chemicals dosing plant is 7-8, and after gravitational settling, supernatant flows into clear water reserviors and keeps in, clear water The waste water in pond enters ultrafiltration raw water box by pump, and adjustings pH value is 6-7, using ultra filtration unit, suspended matter in removal waste water, Grain, bacterium, virus, colloid, larger molecular organics, water, small molecule and solvent enter ultrafiltration water producing tank, and cross-flow water is through Air Exposure After return to press filtration unit；The water inlet of ultrafiltration water producing tank is through the further heavy-metal ion removal of nano-filtration unit and organic matter, water and one Valence ion enters nanofiltration water producing tank, and removing chloride, heavy metal ion are further removed in the water inlet that nanofiltration generates case through reverse osmosis units And organic matter, it produces water and enters reuse water tank.
The present invention adjusts the pH in water body using sulfuric acid and hydrochloric acid, prevents Heavy Metals in Waters iron from chelation occurs and generates Precipitating causes the dirt of film stifled, while reducing the maintenance cost of later period film.
In order to realize the minimizing of the present embodiment concentrated water, innoxious and recycling, be utilized respectively No. 1 sea water desalination unit and No. 2 sea water desalination units handle reverse osmosis concentrated water and nanofiltration concentrated water, the aperture of the sea water desalination membrane that the present invention selects for 0.0005μm；
Specification are as follows: length × outer diameter × internal diameter=1016mm × 201mm × 29mm；
Technological parameter:
Effective area 37m2；
Maximum operating pressure 83bar.
In order to reduce the pollutional load of subsequent membranous system, the chemical cleaning frequency of film is reduced, operating cost is reduced, described No. 1 cartridge filter, No. 2 cartridge filters, No. 3 cartridge filters and No. 4 cartridge filters water inlet add antisludging agent.
It is 280t/d, producing water water quality hardness < 2mmol/L, SiO that the embodiment of the present invention, which finally obtains gained and produces the water of water,2< 4mg/L, iron < 0.03mg/L, pH6-7, chloride ion≤30mg/L, the water of gained concentrated water are 20t/d, water hardness 38- 102mmol/L、SiO224-100mg/L, iron 0.31-3.32mg/L, pH6-7, chloride ion 4057-1528830mg/L.
Producing water can be used as softened water use, and then reach the zero-emission of waste water, and it is only 30 yuan that the operating cost of system is low/ Ton.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention rather than limits, although logical It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be Various changes are made to it in form and in details, without departing from claims of the present invention limited range.

Claims (5)

1. a kind of advanced treatment of wastewater recycling system, including press filtration unit, ultra filtration unit, nano-filtration unit, reverse osmosis list Member and sea water desalination unit, the press filtration unit, ultra filtration unit, nano-filtration unit and reverse osmosis units are successively connected by pipeline It connects, which is characterized in that the press filtration unit includes filter press, sedimentation basin and clear water reserviors, and the water outlet of the filter press passes through Pipeline is connect with the sedimentation basin, and the sedimentation basin is connect with the clear water reserviors；The ultra filtration unit includes ultrafiltration Raw water box, ultrafiltration raw water pump, bag filter, ultrafiltration membrane and ultrafiltration water producing tank, the ultrafiltration raw water box and the ultrafiltration Raw water pump connection, the ultrafiltration raw water pump connect with the bag filter, and the bag filter connects and described The water outlet of ultrafiltration membrane connection, the ultrafiltration membrane is connect by pipeline with the ultrafiltration water producing tank；The nano-filtration unit includes 1 Number raw water pump, No. 1 cartridge filter, No. 1 high-pressure pump, nanofiltration membrane, nanofiltration water producing tank, the ultrafiltration water producing tank pass through No. 1 original Water pump is connect with No. 1 cartridge filter, and No. 1 cartridge filter is connect with No. 1 high-pressure pump, described No. 1 high-pressure pump is connect with the nanofiltration membrane, and the water outlet of the nanofiltration membrane is connect by pipeline with the nanofiltration water producing tank； The reverse osmosis units include No. 2 raw water pumps, and No. 2 cartridge filters, No. 2 high-pressure pumps, reverse osmosis membrane and reuse water tank are described The water outlet of nanofiltration water producing tank connect with No. 2 cartridge filters by No. 2 raw water pumps, No. 2 cartridge filters It is connect with No. 2 high-pressure pumps, No. 2 high-pressure pumps connection is connect with the reverse osmosis membrane, the reverse osmosis membrane Water outlet connect with the reuse water tank by pipeline；The sea water desalination unit includes No. 1 sea water desalination unit and No. 2 Sea water desalination unit, No. 1 sea water desalination unit are connect by pipeline with the concentrated water of the reverse osmosis membrane, and described 2 Number sea water desalination unit is connect by pipeline with the concentrated water of the nanofiltration membrane；
The cross-flow water of the ultrafiltration membrane enters aeration tank by pipeline, and the water outlet of the aeration tank passes through described in pipeline entrance Filter press；
No. 1 sea water desalination unit include No. 1 sea water desalination raw water box, No. 3 raw water pumps, No. 3 high-pressure pumps, No. 3 ensured public security The water outlet of filter and No. 1 sea water desalination membrane, No. 1 sea water desalination raw water box passes through No. 3 raw water pumps and described 3 The connection of number cartridge filter, No. 3 cartridge filters and No. 3 high-pressure pumps connections, No. 3 high-pressure pumps and described 1 The connection of number sea water desalination membrane；The water outlet of No. 1 sea water desalination membrane enters the reuse water tank, No. 1 sea by pipeline The concentrated water of water desalination film is connect by pipeline with the ultrafiltration raw water box；
No. 2 sea water desalination units include No. 2 sea water desalination raw water boxs, No. 4 raw water pumps, more medium filter, No. 4 high pressures Pump, No. 4 cartridge filters and No. 2 sea water desalination membranes, No. 2 sea water desalination raw water boxs are connect with No. 4 raw water pumps, No. 4 raw water pumps connection is connect with the more medium filter, the water outlet of the more medium filter and described 4 The connection of number cartridge filter, No. 4 cartridge filters are connect with No. 4 high-pressure pumps, No. 4 high-pressure pumps and 2 The connection of number sea water desalination membrane；The water outlet of No. 2 sea water desalination membranes enters the reuse water tank, No. 2 seas by pipeline The concentrated water of water desalination film is connect by pipeline with flushing cinder pond；
The aperture of No. 1 sea water desalination membrane and No. 2 sea water desalination membranes is 0.0005 μm.
2. advanced treatment of wastewater recycling system according to claim 1, which is characterized in that the sedimentation basin with The connection of sulfuric acid chemicals dosing plant.
3. advanced treatment of wastewater recycling system according to claim 1, which is characterized in that the ultrafiltration raw water Case is connect with hydrochloric acid chemicals dosing plant.
4. advanced treatment of wastewater recycling system according to claim 1, which is characterized in that No. 1 security personnel Filter, No. 2 cartridge filters, No. 3 cartridge filters and No. 4 cartridge filters water inlet add antisludging agent.
5. advanced treatment of wastewater recycling system according to claim 1-4 is in smelting wastewater advanced treating In application.
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CN100450592C (en) * 2007-02-15 2009-01-14 三达膜科技（厦门）有限公司 Metal smelting factory sewage reclaiming method based on membrane filtering technique
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