CN107555555A - One kind is based on the positive infiltration technology high salt process for treating high-COD waste water of electrodialysis and its device - Google Patents
One kind is based on the positive infiltration technology high salt process for treating high-COD waste water of electrodialysis and its device Download PDFInfo
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- CN107555555A CN107555555A CN201710926548.2A CN201710926548A CN107555555A CN 107555555 A CN107555555 A CN 107555555A CN 201710926548 A CN201710926548 A CN 201710926548A CN 107555555 A CN107555555 A CN 107555555A
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- 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
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- 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 one kind to be based on the positive infiltration technology high salt process for treating high-COD waste water of electrodialysis, is specially：Pretreatment unit water outlet is transported to electrodialysis plant desalting chamber, a liquid part of drawing after dilution is transported to electrodialysis plant enriched chamber, the requirement drawn liquid concentration and reach concentrating regenerative after dilution, liquid circulation will be drawn to be passed through forward osmosis membrane component and draw liquid side, desalting chamber's water outlet simultaneously is transported to forward osmosis membrane component material liquid side, until material liquid side solution concentration is close with drawing liquid side solution concentration, positive permeability apparatus is stopped；Another part for drawing liquid after dilution is transported to and draws liquid regenerating unit progress concentrating regenerative, it is to draw liquid to draw the water outlet of liquid regenerating unit and the water outlet of electrodialysis plant enriched chamber.Also disclose the device used in the above method.Liquid is drawn in reclaiming while it innovatively carries out pro desalting using electrodialytic technique to waste water, is reduced process costs, is shortened technological process, and operating efficiency is fast, and the rate of recovery is high.
Description
Technical field
The invention belongs to Membrane Separation for Water Treatment field, and in particular to one kind is high based on electrodialysis-positive infiltration technology high salt
COD method of wastewater treatment and its equipment therefor, by the way that electrodialysis and positive infiltration technology are coupled, reducing high salt high-COD waste water
Liquid concentrating regenerative is drawn into positive infiltration while concentration, realizes the efficient process of high salt high-COD waste water.
Background technology
Water is Source of life, is the indispensable that the mankind depend on for existence and development.It is but industrialized with expanding economy
Carry out, the process problem of industrial wastewater increasingly highlights, such as the processing of high salt high-COD waste water.High salt high-COD waste water refers in water body
Waste water when salt content is more than 1000mg/L, it is mainly derived from the chemical industry draining such as petrochemical industry, coal chemical industry.It is unprocessed
High salt high-COD waste water be discharged into natural water, not only can polluted-water, cause environmental pollution, and to aqueous bio and the mankind
Health will also result in certain threat.The method for high salt high-COD waste water desalination mainly includes heating power desalination method, changed at present
Desalination process, Electro Sorb desalination process and embrane method etc. are learned, compared with embrane method, it is tediously long multiple that other techniques have high energy consumption, handling process
It is miscellaneous, processing cost is big, the shortcomings such as salt rejection rate is low.Therefore, embrane method processing high salt high-COD waste water turns into its important research direction,
For example, Chinese Patent Application No. 201610948290.1 discloses a kind of circulating positive infiltration high salt organic waste operated continuously
Water treatment system, liquid is drawn to reclaim come deep-treating organic waste water, reverse osmosis technology using positive infiltration technology, realizes waste water
Continuous processing and the recovery for drawing liquid.Above-mentioned patent is when handling high salt high-COD waste water, because positive infiltration is to use concentration drive
The isolation technics of type, the concentration difference of the solution based on forward osmosis membrane both sides is motive force, realizes material liquid to the mass transfer for drawing liquid
Process, so when handling high salt high-COD waste water, what it was required, which draws liquid concentration, certainly will be far longer than 1000mg/L, so not
Corrosive pipeline is only easily caused, and also increases cost of material, on the other hand, liquid concentrating regenerative is drawn in the prior art and typically adopts
With reverse osmosis technology, the higher pressure drawn liquid concentration and substantially increase the work of reverse osmosis unit, aggravation reverse osmosis membrane pollutes,
High salt high-COD waste water is particularly handled there is machine pollution, the service life of film is greatly shortened, increases operating cost.
The content of the invention
It is an object of the invention to provide one kind based on electrodialysis-positive infiltration technology high salt process for treating high-COD waste water and
Its equipment therefor, it is existing to draw liquid concentration height when solving existing embrane method technology high salt high-COD waste water processing, draw liquid concentration
The problems such as regenerative process, operating cost is high, and fouling membrane is serious.
To achieve these goals, the present invention is a kind of based on electrodialysis-positive infiltration technology high salt high-COD waste water processing side
Method, specifically include following steps：
（1）Solid particle in high salt high-COD waste water is removed by pretreatment unit；
（2）Pretreatment unit water outlet is transported to electrodialysis plant desalting chamber, the liquid part of drawing after dilution is transported to electricity
Electrodialysis apparatus enriched chamber, with the progress of electrodialysis plant circulation work, liquid is drawn after being diluted in electrodialysis plant enriched chamber
Concentration raises, and high salt high-COD waste water concentration reduces in desalting chamber, and the liquid concentration of drawing after dilution reaches wanting for concentrating regenerative
Ask, electrodialysis plant is stopped；
（3）Liquid circulation will be drawn to be passed through forward osmosis membrane component and draw liquid side, while desalting chamber's water outlet is transported to forward osmosis membrane component
Material liquid side, forward osmosis membrane component material liquid side moisture constantly draw liquid side, high salt high-COD waste water amount into forward osmosis membrane component
Gradually decrease, draw liquid and gradually dilute, as dilute after draw liquid, until forward osmosis membrane component material liquid side solution concentration with
Forward osmosis membrane component draw liquid side solution concentration it is close when, positive permeability apparatus is stopped, described to draw a part in liquid and come from
Step（2）The water outlet of middle electrodialysis plant enriched chamber；
（4）Another part for drawing liquid after dilution is transported to and draws liquid regenerating unit progress concentrating regenerative, draws liquid regeneration
Device water outlet and the water outlet of electrodialysis plant enriched chamber are to draw liquid.
It is of the invention a kind of based on electrodialysis-positive infiltration technology high salt high-COD waste water processing unit, including pretreatment unit,
Electrodialysis cell, positive permeation unit and liquid regeneration unit is drawn, specifically, the material liquid that pretreatment unit includes being sequentially connected enters
Expect regulating valve, material liquid feed pump and cartridge filter；Electrodialysis cell include desalting chamber's feed storage tank, desalting chamber's feed pump,
Desalting chamber's feed rate regulating valve, enriched chamber's feed rate regulating valve, enriched chamber's feed pump, enriched chamber's feed storage tank, desalting chamber
Discharging flow regulating valve, electrodialysis discharging pump, enriched chamber's discharging flow regulating valve, enriched chamber's discharging pump and by electrodialytic membranes
What heap, desalting chamber's water tank, pole room water tank, enriched chamber's water tank, desalting chamber's circulating pump, pole room circulating pump and enriched chamber's circulating pump were formed
Electrodialysis plant, desalting chamber's feed storage tank pass sequentially through desalting chamber's feed pump and desalting chamber's feed rate regulating valve and desalting chamber's water
It is connected, enriched chamber's feed storage tank passes sequentially through enriched chamber's feed pump and enriched chamber's feed rate regulating valve and connected with enriched chamber's water tank
Connect, desalting chamber's water tank, pole room water tank and enriched chamber's water tank are circulated by desalting chamber's circulating pump, pole room circulating pump and enriched chamber respectively
Pump forms circulation line with the desalting chamber in electrodialysis membrane stack, pole room and enriched chamber；Positive permeation unit includes positive infiltration material liquid
Storage tank, positive infiltration material liquid feed pump, material liquid flow control valve, forward osmosis membrane component are just being permeated, liquid circulating pump is being drawn, draws
Liquid circulating storage tank, liquid stream adjustable valve is drawn, liquid feed rate regulating valve is drawn, draws liquid feed pump, draw liquid discharging pump, draw
Take liquid discharging regulating valve and draw liquid storage tank, desalting chamber's water tank passes sequentially through desalting chamber's discharging flow regulating valve and electrodialysis discharging
The positive infiltration raw material liquid storage tank water inlet of pump connection, positive raw material liquid storage tank, positive infiltration raw material pump, the positive infiltration raw material flow quantity of permeating are adjusted
Save valve, forward osmosis membrane component feed side and positive infiltration raw material liquid storage tank and form circulation line, enriched chamber's water tank passes sequentially through concentration
Room discharging flow regulating valve connects with enriched chamber's discharging pump draws liquid storage tank water inlet, draws liquid storage tank delivery port and passes sequentially through and draws
Take liquid feed pump and draw liquid feed rate regulating valve and connected with drawing liquid circulating storage tank, draw liquid circulating storage tank, draw liquid and follow
Ring pump and forward osmosis membrane component, which draw liquid side and draw liquid circulating storage tank, is sequentially connected composition circulation line, is drawing liquid circulation storage
On the pipeline of tank delivery port front end set draw liquid stream adjustable valve, draw liquid discharging pump and draw liquid discharge regulating valve successively with
Draw liquid circulating storage tank to be connected, draw liquid regeneration unit water inlet and be connected with drawing liquid discharging pump delivery port, it is described to draw liquid
The single one kind in reverse osmosis unit, electrodialysis plant, distillation device of regeneration.
Further, desalting chamber's feed storage tank, desalting chamber's water tank, enriched chamber's water tank, positive infiltration raw material liquid storage tank, enriched chamber
Feed storage tank, draw liquid storage tank and draw in liquid circulating storage tank and be equipped with liquid level sensor；Desalting chamber's water tank, enriched chamber's water tank and
Draw and conductivity sensor is set in liquid circulating storage tank.
Further, the liquid that draws is NaCl, Mg2Cl、MgSO4And Na2SO4Deng inorganic salt solution.
Compared with prior art, the present invention has advantages below：1. the present invention is innovatively using electrodialytic technique to height
Liquid is drawn in reclaiming while salt high-COD waste water carries out pro desalting, and the dense of high salt high-COD waste water is reduced by electrodialysis
Degree, the high salt high-COD waste water concentration for making to enter the processing of positive osmosis system reduce, and reduce process costs, while electrodialysis will be drawn
Liquid concentrating regenerative is taken, shortens technological process, has operating efficiency fast, the rate of recovery is high；2. because positive infiltration is spontaneous process,
Compared with techniques such as counter-infiltrations with environmental protection, low stain, without pressure or low pressure operation and the advantage high to pollutant rejection；3. by
It is the process without phase transformation in positive infiltration and electrodialytic technique, there is energy compared to traditional separating proces such as distillation, crystallizations
Consume low, separative efficiency is high, save entreprise cost.
Brief description of the drawings
Fig. 1 is a kind of based on electrodialysis-positive infiltration technology high salt high-COD waste water processing device structure diagram for invention.
In figure：1 material liquid charging regulating valve, 2 cartridge filters, 3 material liquid feed pumps, 4 desalting chamber's feed storage tanks, 5 take off
Salt room feed pump, 6 desalting chamber's feed rate regulating valves, 7 desalting chamber's water tanks, 8 desalting chamber's discharging flow regulating valves, 9 desalting chamber follow
Ring pump, 10 pole room circulating pumps, 11 pole room water tanks, 12 enriched chamber's circulating pumps, 13 enriched chamber's discharging flow regulating valves, 14 enriched chamber's water
Case, 15 electrodialysis membrane stacks, 16 enriched chamber's feed rate regulating valves, 17 enriched chamber's feed pumps, 18 electrodialysis discharging pumps, 19 positive infiltrations
Raw material liquid storage tank, 20 positive infiltration material liquid feed pumps, 21 positive infiltration material liquid flow control valves, 22 draw liquid storage tank, 23 just oozed
Permeable membrane component, 24 draw liquid circulating pump, 25 draw liquid circulating storage tank, 26 draw liquid stream adjustable valve, 27 draw liquid feed rate
Regulating valve, 28 draw liquid feed pump, 29 draw liquid discharging pump, 30 draw liquid discharging regulating valve, 31 enriched chamber's feed storage tanks, 32 dense
Contracting room discharging pump.
Embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description：
Embodiment 1：
It is of the invention a kind of based on electrodialysis-positive infiltration technology high salt process for treating high-COD waste water, specifically include following steps：
（1）Solid particle in high salt high-COD waste water is removed by pretreatment unit；
（2）Pretreatment unit water outlet is transported to electrodialysis plant desalting chamber, the liquid part of drawing after dilution is transported to electricity
Electrodialysis apparatus enriched chamber, with the progress of electrodialysis plant circulation work, liquid is drawn after being diluted in electrodialysis plant enriched chamber
Concentration raises, and high salt high-COD waste water concentration reduces in desalting chamber, and the liquid concentration of drawing after dilution reaches wanting for concentrating regenerative
Ask, electrodialysis plant is stopped；
（3）Liquid circulation will be drawn to be passed through forward osmosis membrane component and draw liquid side, while desalting chamber's water outlet is transported to forward osmosis membrane component
Material liquid side, forward osmosis membrane component material liquid side moisture constantly draw liquid side, high salt high-COD waste water amount into forward osmosis membrane component
Gradually decrease, draw liquid and gradually dilute, as dilute after draw liquid, until forward osmosis membrane component material liquid side solution concentration with
Forward osmosis membrane component draw liquid side solution concentration it is close when, positive permeability apparatus is stopped, described to draw a part in liquid and come from
Step（2）The water outlet of middle electrodialysis plant enriched chamber；
（4）Another part for drawing liquid after dilution is transported to and draws liquid regenerating unit progress concentrating regenerative, draws liquid regeneration
Device water outlet and the water outlet of electrodialysis plant enriched chamber are to draw liquid.
As shown in figure 1, the present invention is a kind of to be based on electrodialysis-positive infiltration technology high salt high-COD waste water processing unit, including it is pre-
Processing unit, electrodialysis cell, positive permeation unit and draw liquid regeneration unit（It is not drawn into figure）, specifically, pretreatment unit
Including material liquid charging regulating valve 1, material liquid feed pump 2 and the cartridge filter 3 being sequentially connected；Electrodialysis cell includes desalination
Room feed storage tank 4, desalting chamber's feed pump 5, desalting chamber's feed rate regulating valve 6, enriched chamber's feed rate regulating valve 16, enriched chamber
Feed pump 17, enriched chamber's feed storage tank 31, desalting chamber's discharging flow regulating valve 8, electrodialysis discharging pump 18, enriched chamber's discharging flow
Regulating valve 13, enriched chamber's discharging pump 32 and by electrodialysis membrane stack 15, desalting chamber's water tank 7, pole room water tank 11, enriched chamber's water tank
14th, the electrodialysis plant that desalting chamber's circulating pump 9, pole room circulating pump 10 and enriched chamber's circulating pump 12 are formed, desalting chamber's feed storage tank 4
Pass sequentially through desalting chamber's feed pump 5 and desalting chamber's feed rate regulating valve 6 with desalting chamber water tank 7 to be connected, enriched chamber's feed storage tank
31 pass sequentially through enriched chamber's feed pump 17 and enriched chamber's feed rate regulating valve 16 is connected with enriched chamber's water tank 14, desalting chamber's water tank
7th, pole room water tank 11 and enriched chamber's water tank 14 pass through desalting chamber's circulating pump 9, pole room circulating pump 10 and enriched chamber's circulating pump 12 respectively
Circulation line is formed with the desalting chamber in electrodialysis membrane stack 15, pole room and enriched chamber；Positive permeation unit includes positive infiltration material liquid
Storage tank 19, positive infiltration material liquid feed pump 20, positive infiltration material liquid flow control valve 21, forward osmosis membrane component 23, draw liquid and follow
Ring pump 24, liquid circulating storage tank 25 is drawn, liquid stream adjustable valve 26 is drawn, draws liquid feed rate regulating valve 27, draws liquid charging
Pump 28, liquid discharging pump 29 is drawn, liquid discharging regulating valve 30 is drawn and draws liquid storage tank 22, desalting chamber's water tank 7 passes sequentially through desalination
Room discharging flow regulating valve 8 and electrodialysis discharging pump 18 connect the positive water inlet of infiltration raw material liquid storage tank 19, positive to permeate material liquid storage
Tank 19, positive infiltration raw material pump 20, just permeating material liquid flow control valve 21, forward osmosis membrane component feed side and just permeating material liquid
Storage tank 19 forms circulation line, and enriched chamber's water tank 14 passes sequentially through enriched chamber's discharging flow regulating valve 13 and enriched chamber's discharging pump 32
The water inlet of liquid storage tank 22 is drawn in connection, is drawn the delivery port of liquid storage tank 22 and is passed sequentially through to draw liquid feed pump 28 and draw liquid and enters stream
Adjustable valve 27 connects with drawing liquid circulating storage tank 25, draws liquid circulating storage tank 25, draws liquid circulating pump 24 and forward osmosis membrane group
Part 23, which draws liquid side and draws liquid circulating storage tank 25, is sequentially connected composition circulation line, before the delivery port of liquid circulating storage tank 25 is drawn
Set on the pipeline at end and draw liquid stream adjustable valve 26, drawn liquid discharging pump 29 and draw liquid discharging regulating valve 30 successively with drawing
Liquid circulating storage tank 25 is connected, and draws liquid regeneration unit water inlet and is connected with drawing the delivery port of liquid discharging pump 29, described to draw liquid
The single one kind in reverse osmosis unit, electrodialysis plant, distillation device of regeneration.
Further, desalting chamber's feed storage tank 4, desalting chamber's water tank 7, enriched chamber's water tank 14, positive infiltration raw material liquid storage tank 19,
Enriched chamber's feed storage tank 31, draw liquid storage tank 22 and draw in liquid circulating storage tank 25 and be equipped with liquid level sensor；Desalting chamber's water tank
7th, enriched chamber's water tank 14 and draw conductivity sensor is set in liquid circulating storage tank 25.
Further, the liquid that draws is NaCl, Mg2Cl、MgSO4And Na2SO4Deng inorganic salt solution.
Of the invention a kind of based on electrodialysis-positive infiltration technology high salt high-COD waste water processing unit, specific work process is such as
Under：
1st, the aperture that regulating valve 1 is fed by adjusting material liquid adjusts liquid inventory, then makes high salt by material liquid feed pump 2
High-COD waste water is injected into standby in desalting chamber's feed storage tank 4 after cartridge filter 3 is filtered to remove more than 5um particle；
2nd, when the liquid level in desalting chamber's feed storage tank 4 reaches certain value, desalting chamber's feed pump 5 and enriched chamber's feed pump are started
17, open desalting chamber's feed rate regulating valve 6 and enriched chamber's feed rate regulating valve 16 adjusts flow, respectively feed desalting chamber
High salt high-COD waste water in storage tank 4 is injected into desalting chamber's water tank 7, and liquid note is drawn after the dilution in enriched chamber's feed storage tank 34
Enter into enriched chamber's water tank 14, while the injector water into pole room water tank 11, treat the liquid of desalting chamber's water tank 7 and enriched chamber's water tank 14
When position reaches certain value, desalting chamber's feed rate regulating valve 6 and desalting chamber's feed pump 5, enriched chamber's feed rate regulating valve are closed
16 and enriched chamber's feed pump 17；
3rd, desalting chamber circulating pump 9, pole room circulating pump 10 and enriched chamber's circulating pump 12 are opened, by be arranged on pole room, enriched chamber and
Flowmeter on desalting chamber's pipeloop adjusts respective flow, and after stability of flow, electrodialysis membrane stack is passed through into dc source,
Electrodialysis plant is started working, and in the presence of electric field force, anion and cation in desalting chamber enter enriched chamber, with following
Ring is constantly carried out, and the salinity in high salt high-COD waste water gradually reduces, and the liquid concentration of drawing after dilution gradually rises, and works as concentration
Electrical conductivity in room water tank 14 reaches certain numerical value（5ms/cm-15ms/cm）When, the completion of liquid concentrating regenerative is drawn after dilution,
Desalting chamber circulating pump 9, pole room circulating pump 10 and enriched chamber's circulating pump 12 are closed, opens desalting chamber's discharging flow regulating valve 8 and dense
Contracting room discharging flow regulating valve 13 adjusts flow, electrodialysis discharging pump 18 and enriched chamber's discharging pump 32 is opened, respectively by desalting chamber
Waste water in water tank 7 is injected into positive infiltration raw material liquid storage tank 19, is injected into and draws liquid storage tank the liquid that draws in enriched chamber 14
In 22；
4th, when just liquid level reaches certain numerical value in infiltration raw material liquid storage tank 19, the He of desalting chamber's discharging flow regulating valve 8 is closed
Electrodialysis discharging pump 18, opening draw liquid stream adjustable valve 26 and adjust flow, and liquid storage tank will be drawn by drawing liquid circulating pump 24
The liquid that draws in 25 is recycled into forward osmosis membrane component and draws liquid side, while opens positive infiltration material liquid flow control valve 21 and adjust
Amount of restriction, start positive infiltration material liquid feed pump 20, the high salt high-COD waste water that concentration reduces in positive infiltration raw material liquid storage tank is followed
Ring is driven into forward osmosis membrane component material liquid side, and the water in high salt high-COD waste water in the presence of osmotic pressure passes through forward osmosis membrane
Into drawing in liquid, so as to which high salt high-COD waste water is concentrated, liquid dilution is drawn；
5th, with the continuous progress of circulation, when conductivity sensor in just infiltration raw material liquid storage tank 19 and liquid storage tank electrical conductivity is drawn
When the registration of sensor instrument is close（If difference is 5ms/cm）When, it is former to close just infiltration material liquid flow control valve 21, positive infiltration
Feed liquid feed pump 20 and draw liquid circulating pump 24, opening draws liquid discharging pump 29 and draws liquid discharging regulating valve 30 and will draw liquid and follows
A liquid part of drawing after dilution in ring storage tank 25 is transported in enriched chamber's feed storage tank 31, so that electrodialysis concentrating regenerative is drawn
Liquid is taken, another part, which is transported to, draws liquid regeneration unit, and when it is 0 to draw the liquid level in liquid circulating storage tank 25, liquid is drawn in closing
Discharging pump 29 draws liquid feed pump 28 and draws liquid feed rate regulating valve 27, will draw with liquid discharging regulating valve 30, opening is drawn
The liquid that draws of concentrating regenerative in liquid storage tank 22 is taken to be transported to and draw in liquid circulating storage tank 25, when drawing the liquid in liquid circulating storage tank 25
Position reaches certain numerical value（During such as 80%）, close and draw liquid feed rate regulating valve 27 and draw liquid feed pump 28, draw fluid exchange
Finish.
Claims (4)
1. one kind is based on electrodialysis-positive infiltration technology high salt process for treating high-COD waste water, it is characterised in that specifically includes following
Step：
（1）Solid particle in high salt high-COD waste water is removed by pretreatment unit；
（2）Pretreatment unit water outlet is transported to electrodialysis plant desalting chamber, the liquid part of drawing after dilution is transported to electricity
Electrodialysis apparatus enriched chamber, with the progress of electrodialysis plant circulation work, liquid is drawn after being diluted in electrodialysis plant enriched chamber
Concentration raises, and high salt high-COD waste water concentration reduces in desalting chamber, and the liquid concentration of drawing after dilution reaches wanting for concentrating regenerative
Ask, electrodialysis plant is stopped；
（3）Liquid circulation will be drawn to be passed through forward osmosis membrane component and draw liquid side, while desalting chamber's water outlet is transported to forward osmosis membrane component
Material liquid side, forward osmosis membrane component material liquid side moisture constantly draw liquid side, high salt high-COD waste water amount into forward osmosis membrane component
Gradually decrease, draw liquid and gradually dilute, as dilute after draw liquid, until forward osmosis membrane component material liquid side solution concentration with
Forward osmosis membrane component draw liquid side solution concentration it is close when, positive permeability apparatus is stopped, described to draw a part in liquid and come from
Step（2）The water outlet of middle electrodialysis plant enriched chamber；
（4）Another part for drawing liquid after dilution is transported to and draws liquid regenerating unit progress concentrating regenerative, draws liquid regeneration
Device water outlet and the water outlet of electrodialysis plant enriched chamber are to draw liquid.
2. electrodialysis-positive infiltration technology high salt process for treating high-COD waste water equipment therefor is based on described in a kind of claim 1, its
It is characterised by, including pretreatment unit, electrodialysis cell, positive permeation unit and draws liquid regeneration unit, specifically, pretreatment is single
Member includes material liquid charging regulating valve, material liquid feed pump and the cartridge filter being sequentially connected；Electrodialysis cell includes desalination
Room feed storage tank, desalting chamber's feed pump, desalting chamber's feed rate regulating valve, enriched chamber's feed rate regulating valve, enriched chamber's charging
Pump, enriched chamber's feed storage tank, desalting chamber's discharging flow regulating valve, electrodialysis discharging pump, enriched chamber's discharging flow regulating valve, concentration
Room discharging pump and by electrodialysis membrane stack, desalting chamber's water tank, pole room water tank, enriched chamber's water tank, desalting chamber's circulating pump, pole room circulate
The electrodialysis plant that pump and enriched chamber's circulating pump are formed, desalting chamber's feed storage tank passes sequentially through desalting chamber's feed pump and desalting chamber enters
Stream adjustable valve passes sequentially through enriched chamber's feed pump and enriched chamber's feed rate with aqueous phase company of desalting chamber, enriched chamber's feed storage tank
Regulating valve is connected with enriched chamber's water tank, and desalting chamber's water tank, pole room water tank and enriched chamber's water tank pass through desalting chamber's circulating pump, pole respectively
Room circulating pump and enriched chamber's circulating pump form circulation line with the desalting chamber in electrodialysis membrane stack, pole room and enriched chamber；Positive infiltration
Unit includes positive infiltration raw material liquid storage tank, positive infiltration material liquid feed pump, positive infiltration material liquid flow control valve, forward osmosis membrane group
Part, liquid circulating pump is drawn, liquid circulating storage tank is drawn, draws liquid stream adjustable valve, draws liquid feed rate regulating valve, liquid is drawn and enters
Material pump, liquid discharging pump is drawn, liquid discharging regulating valve is drawn and draws liquid storage tank, desalting chamber's water tank passes sequentially through desalting chamber's reactor effluent stream
Adjustable valve connects positive infiltration raw material liquid storage tank water inlet with electrodialysis discharging pump, positive to permeate raw material liquid storage tank, just permeate raw material
Pump, positive infiltration material liquid flow control valve, forward osmosis membrane component feed side and positive infiltration raw material liquid storage tank form circulation line, dense
Contracting room water tank, which passes sequentially through enriched chamber's discharging flow regulating valve and connected with enriched chamber's discharging pump, draws liquid storage tank water inlet, draws liquid
Storage tank delivery port is passed sequentially through to draw liquid feed pump and draw liquid feed rate regulating valve and connected with drawing liquid circulating storage tank, is drawn
Liquid circulating storage tank, draw liquid circulating pump and forward osmosis membrane component draws liquid side and draws liquid circulating storage tank and is sequentially connected composition circulation
Pipeline, set on the pipeline for drawing liquid circulating storage tank delivery port front end and draw liquid stream adjustable valve, drawn liquid discharging pump and draw
Take liquid discharging regulating valve to be connected successively with drawing liquid circulating storage tank, draw liquid regeneration unit water inlet and pumped out with drawing liquid discharging
The mouth of a river connects, described to draw the single one kind in reverse osmosis unit, electrodialysis plant, distillation device of liquid regeneration.
3. according to claim 2 based on electrodialysis-positive infiltration technology high salt high-COD waste water processing unit, it is characterised in that
Desalting chamber's feed storage tank, desalting chamber's water tank, enriched chamber's water tank, positive infiltration raw material liquid storage tank, enriched chamber's feed storage tank, draw liquid storage
Tank and draw in liquid circulating storage tank and be equipped with liquid level sensor；Desalting chamber's water tank, enriched chamber's water tank and draw in liquid circulating storage tank
Conductivity sensor is set.
4. according to claim 3 based on electrodialysis-positive infiltration technology high salt high-COD waste water processing unit, it is characterised in that
The liquid that draws is NaCl, Mg2Cl、MgSO4And Na2SO4Deng inorganic salt solution.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113795328A (en) * | 2019-02-28 | 2021-12-14 | 水通道蛋白有限公司 | Generation of concentrated spent dialysate |
| CN115490308A (en) * | 2022-10-25 | 2022-12-20 | 北控水务(中国)投资有限公司 | Reverse osmosis concentrated water regeneration treatment equipment and method |
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| US9427705B1 (en) * | 2015-05-22 | 2016-08-30 | Basel Abusharkh | Method of solvent recovery from a dilute solution |
| CN105417801A (en) * | 2016-01-18 | 2016-03-23 | 青岛理工大学 | Method and system for extracting fresh water from sewage with synergy of forward osmosis and electrodialysis |
| CN105712560A (en) * | 2016-04-13 | 2016-06-29 | 北京新源国能科技集团股份有限公司 | Device and method for treating high-salinity wastewater with forward osmosis technique |
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| CN113795328A (en) * | 2019-02-28 | 2021-12-14 | 水通道蛋白有限公司 | Generation of concentrated spent dialysate |
| CN115490308A (en) * | 2022-10-25 | 2022-12-20 | 北控水务(中国)投资有限公司 | Reverse osmosis concentrated water regeneration treatment equipment and method |
| CN115490308B (en) * | 2022-10-25 | 2023-11-10 | 北控水务(中国)投资有限公司 | Reverse osmosis concentrated water regeneration treatment equipment and method |
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