CN104478142B - A kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution - Google Patents
A kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution Download PDFInfo
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- CN104478142B CN104478142B CN201410735546.1A CN201410735546A CN104478142B CN 104478142 B CN104478142 B CN 104478142B CN 201410735546 A CN201410735546 A CN 201410735546A CN 104478142 B CN104478142 B CN 104478142B
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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
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- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The present invention relates to a kind of method that in containing alcohol waste water reverse osmosis concentrated solution, monovalence salts substances is removed, belong to field of environment protection.This method achieves separating of alcohol and monovalent salt in containing alcohol waste water by electrodialytic mode, and advantage is mainly reflected in and adopts reverse osmosis water outlet to carry out ion exchange as the dense water of electrodialysis system with containing alcohol waste water, it is not necessary to uses tap water or pure water, has saved water resource；Containing alcohol waste water loss rate of alcohol in desalination processes is very low, and the response rate is up to 95%；After electrodialysis process, dense water can directly discharge；The corrosion of evaporation equipment, in follow-up distillation and concentration process, is substantially reduced by the containing alcohol waste water after electrodialysis process.
Description
Technical field
The invention belongs to environmental protection technical field, be specially and a kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution.
Background technology
For safeguarding the flight safety of airborne vehicle in winter, airport needs to adopt the deicing liquid using dihydroxylic alcohols as freezing point depressing agent that aircraft and runway are carried out deicing, thus substantial amounts of containing alcohol waste water can be produced.Containing the high alcohols material of chemical oxygen consumption (COC) (waste water COD of 1% alcohol content > 10000mg/L), surfactant and substantial amounts of salts substances in this kind of waste water, directly the ecological environment of serious harm airport periphery is understood in discharge.
Currently mainly adopt distillating method that containing alcohol waste water is processed.Owing in the waste water of collection, determining alcohol is about 1 ~ 2%, need substantial amounts of energy consumption during waste water evaporation, in order to reduce the energy consumption of waste water subsequent evaporation, generally after containing alcohol waste water remove impurity, carry out reverse-osmosis treated, make the determining alcohol in waste water reach 10% or higher.But in reverse osmosis process, the monovalence salts substances in waste water still remains in concentrated solution after being retained by reverse osmosis membrane so that containing substantial amounts of monovalent ion in concentrated solution, its electrical conductivity is about 2000 ~ 4000 μ s/cm.The existence of salt can cause that follow-up vapo(u)rizing temperature constantly raises, and energy consumption increases, and increases wastewater treatment expense, and evaporation equipment is at high temperature easily produced corrosion by the chloride ion in waste water.
Conventional monovalent ion minimizing technology mainly has ion exchange and electroosmose process.Ion exchange is when processing containing alcohol waste water reverse osmosis concentrated solution, and resin regeneration needs the soda acid of consumption 3 ~ 5 times and substantial amounts of water, and the containing alcohol waste water of generation and acid-base waste fluid easily cause environmental pollution.
Electroosmose process is the effective ways of a kind of separate electrolyte and non-electrolyte, utilize the selective penetrated property of ion exchange membrane, under the effect of extra electric field, ion is moved in another part water from a part of water, be widely used in the aspect such as desalinization, fresh water purification.
Patent CN1522997A and CN101117306B all discloses the electroosmose process desalinating process for 1,3-propanediol fermentation liquor.This technique can effectively remove acylate and inorganic salt in 1.3-propylene glycol, is substantially reduced the loss rate of product.Although this technique can effectively remove the salts substances in fermentation liquid, reduce its electrical conductivity, but the processing procedure of fermentation liquid need nonetheless remain for acid-base solution, film is carried out.
A kind of electrodialysis described in patent CN102351352A-high-efficiency evaporating processes the method that mining and metallurgy waste water is film filtration concentrated, enters into and enter back into vapo(u)rization system after electrodialysis system carries out concentration further and process after being collected by the concentrated solution obtained in membrane filtration by the mining and metallurgy waste water containing heavy metal.Although the method is capable of film filtration concentrated process, but need to add antisludging agent to prevent the flux of ion exchange membrane from declining in processing procedure, therefore operation stability is not high, the electrodialysis concentrated solution simultaneously obtained still needs to carry out high-efficiency evaporating process, and the corrosion of evaporation equipment is still unavoidable from by its high-concentration chlorine ion.
In order to realize the recycling of containing alcohol waste water, reduce evaporating concentration process containing alcohol waste water to the corrosion of equipment and harm, in the urgent need to the technique of monovalent ion in a kind of effective removal containing alcohol waste water and method.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of reverse osmosis produced water removes the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution as the exchanged water in electrodialysis process process.
The concrete technical scheme of the present invention is as follows:
A kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution, it is characterized in that: the steps include: that reverse osmosis charging obtains having the reverse osmosis concentrated liquid of monovalent ion containing alcohol waste water and reverse osmosis to pass through liquid through reverse osmosis unit, containing monovalent ion in described reverse osmosis concentrated liquid, described reverse osmosis concentrated liquid enters into the freshwater room of first order electrodialysis plant, described part reverse osmosis enters into the dense hydroecium of first order electrodialysis plant by liquid, through first order electrodialysis process, monovalent ion in reverse osmosis concentrated liquid carries out ion exchange through the selective penetrated property of electrodialysis system intermediate ion exchange membrane and obtains one-level electrodialysis fresh water, monovalent ion in reverse osmosis concentrated liquid then moves to reverse osmosis and obtains the dense water of one-level electrodialysis by liquid；The dense water of one-level electrodialysis enters into the freshwater room in the electrodialysis system of the second level, the reverse osmosis of another part then enters into the dense hydroecium of second level electrodialysis plant by liquid, the dense water of one-level electrodialysis and reverse osmosis carry out ion exchange by liquid, finally give two grades of electrodialysis fresh water and two grades of dense water of electrodialysis；Two grades of dense water of electrodialysis containing monovalent ion meet discharging standards requirement, it is possible to directly discharge.
Being also associated with at least one electrodialysis plant after described two grades of electrodialysis plants, form multistage electrodialysis structure, the electrodialysis plant that the electrodialysis plant of upper level and reverse osmosis enter to next stage by liquid carries out ion exchange.
Described reverse osmosis concentrated liquid, after the filtration of accurate filter, enters into the freshwater room of first order electrodialysis plant.
Described one-level electrodialysis fresh water enters into first order electrodialysis fresh-water tank, carries out follow-up distillation process, and the alcohol obtained carries out regeneration.
Described two grades of electrodialysis fresh water are back to the entrance of reverse osmosis unit.
Determining alcohol in described containing alcohol waste water reverse osmosis concentrated solution is 5 ~ 20%, and electrical conductivity is 2000 ~ 4000 μ s/cm, pH is 7.0 ~ 8.5；Reverse osmosis is 5 ~ 20 μ s/cm, pH by the electrical conductivity of liquid is 7.0 ~ 7.5.
The described light electrical conductivity of water of one-level electrodialysis is 10 ~ 100 μ s/cm, pH is 7.0 ~ 8.0, and the determining alcohol in one-level electrodialysis fresh water is about 5 ~ 19%.
The described dense electrical conductivity of water of one-level electrodialysis is 2000 ~ 4000 μ s/cm, and the determining alcohol in the dense water of one-level electrodialysis is 0.5 ~ 1.5%.
Described two grades of light electrical conductivity of waters of electrodialysis are 10 ~ 100 μ s/cm, and the determining alcohol in two grades of electrodialysis fresh water is 0.5 ~ 1.5%.
Containing monovalent ion in described two grades of dense water of electrodialysis, electrical conductivity is 2000 ~ 4000 μ s/cm, and in two grades of dense water of electrodialysis, determining alcohol is 100 ~ 500mg/L.
Electrodialysis system includes first order electrodialysis plant and second level electrodialysis plant, and the operation pressure of electrodialysis system is 0.1 ~ 0.4bar, and operation voltage is 100 ~ 200V, and operation electric current is 2 ~ 4A, and operation temperature is 5 ~ 40 DEG C.
Compared with prior art, the invention have the advantage that
1, the electrodialysis process process of this method can directly utilize reverse osmosis by liquid as the exchanged water in electrodialysis process process, without using tap water or pure water, save water resource, and in the dense water after processing, the concentration of alcohol is less than 500mg/L, it is possible to directly discharged.
2, the accurate filter that the present invention adopts is title, uses accurate filter can prevent electrodialytic membranes from being polluted by solid impurity.
3, the containing alcohol waste water of present invention loss rate of alcohol in desalination processes is very low, loss rate≤10% of alcohol.
4, in the dense water after electrodialysis process of the present invention, alcohol content is very low, it is possible to directly discharge.
5, the useless electrical conductivity of water of the containing alcohol after electrodialysis process is down to 100 below μ s/cm, is substantially reduced in follow-up distillation and concentration process the waste water corrosion to evaporation equipment.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
Wherein 1 is reverse osmosis unit, and 2 is accurate filter, and 3 is first order electrodialysis plant, and 4 is first order electrodialysis fresh-water tank, and 5 is second level electrodialysis plant.
Detailed description of the invention
Below in conjunction with accompanying drawing 1, embodiments of the invention are specifically described.
Embodiment 1
A kind of remove the step of the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution and be: reverse osmosis charging obtains having the reverse osmosis concentrated liquid of monovalent ion containing alcohol waste water and reverse osmosis to pass through liquid through reverse osmosis unit 1, containing monovalent ion in described reverse osmosis concentrated liquid, described reverse osmosis concentrated liquid enters into the freshwater room of first order electrodialysis plant 3, described part reverse osmosis enters into the dense hydroecium of first order electrodialysis plant 3 by liquid, through first order electrodialysis process, monovalent ion in reverse osmosis concentrated liquid carries out ion exchange through the selective penetrated property of electrodialysis system intermediate ion exchange membrane and obtains one-level electrodialysis fresh water, monovalent ion in reverse osmosis concentrated liquid then moves to reverse osmosis and obtains the dense water of one-level electrodialysis by liquid；The dense water of one-level electrodialysis enters into the freshwater room in the electrodialysis system of the second level, the reverse osmosis of another part then enters into the dense hydroecium of second level electrodialysis plant 5 by liquid, the dense water of one-level electrodialysis and reverse osmosis carry out ion exchange by liquid, finally give two grades of electrodialysis fresh water and two grades of dense water of electrodialysis；Two grades of dense water of electrodialysis containing monovalent ion meet discharging standards requirement, it is possible to directly discharge.
The electrodialysis process process of this method can directly utilize reverse osmosis by liquid as the exchanged water in electrodialysis process process, without using tap water or pure water, save water resource, and in the dense water after processing, the concentration of alcohol is less than 500ppm, it is possible to directly discharged.
Embodiment 2
A kind of remove the step of the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution and be: reverse osmosis charging obtains having the reverse osmosis concentrated liquid of monovalent ion containing alcohol waste water and reverse osmosis to pass through liquid through reverse osmosis unit 1, containing monovalent ion in described reverse osmosis concentrated liquid, described reverse osmosis concentrated liquid enters into the freshwater room of first order electrodialysis plant 3, described part reverse osmosis enters into the dense hydroecium of first order electrodialysis plant 3 by liquid, through first order electrodialysis process, monovalent ion in reverse osmosis concentrated liquid carries out ion exchange through the selective penetrated property of electrodialysis system intermediate ion exchange membrane and obtains one-level electrodialysis fresh water, monovalent ion in reverse osmosis concentrated liquid then moves to reverse osmosis and obtains the dense water of one-level electrodialysis by liquid；The dense water of one-level electrodialysis enters into the freshwater room in the electrodialysis system of the second level, the reverse osmosis of another part then enters into the dense hydroecium of second level electrodialysis plant 5 by liquid, the dense water of one-level electrodialysis and reverse osmosis carry out ion exchange by liquid, finally give two grades of electrodialysis fresh water and two grades of dense water of electrodialysis；Two grades of dense water of electrodialysis containing monovalent ion meet discharging standards requirement, it is possible to directly discharge.Being also associated with at least one electrodialysis plant after described two grades of electrodialysis plants 5, form multistage electrodialysis structure, the electrodialysis plant that the electrodialysis plant of upper level and reverse osmosis enter to next stage by liquid carries out ion exchange.
Reverse osmosis concentrated liquid, after the filtration of accurate filter 2, enters into the freshwater room of first order electrodialysis plant 3.One-level electrodialysis fresh water enters into first order electrodialysis fresh-water tank 4, carries out follow-up distillation process, and the alcohol obtained carries out regeneration.Two grades of electrodialysis fresh water are back to the entrance of reverse osmosis unit 1.
The electrodialysis process process of this method can directly utilize reverse osmosis by liquid as the exchanged water in electrodialysis process process, without using tap water or pure water, save water resource, and in the dense water after processing, the concentration of alcohol is less than 500ppm, it is possible to directly discharged.The accurate filter 2 that the present invention adopts is title, uses accurate filter 2 can prevent electrodialytic membranes from being polluted by solid impurity.
Embodiment 3
A kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution and the steps include: that reverse osmosis charging obtains having the reverse osmosis concentrated liquid of monovalent ion containing alcohol waste water and reverse osmosis to pass through liquid through reverse osmosis unit 1, containing monovalent ion in described reverse osmosis concentrated liquid, described reverse osmosis concentrated liquid enters into the freshwater room of first order electrodialysis plant 3, described part reverse osmosis enters into the dense hydroecium of first order electrodialysis plant 3 by liquid, through first order electrodialysis process, monovalent ion in reverse osmosis concentrated liquid carries out ion exchange through the selective penetrated property of electrodialysis system intermediate ion exchange membrane and obtains one-level electrodialysis fresh water, monovalent ion in reverse osmosis concentrated liquid then moves to reverse osmosis and obtains the dense water of one-level electrodialysis by liquid；The dense water of one-level electrodialysis enters into the freshwater room in the electrodialysis system of the second level, the reverse osmosis of another part then enters into the dense hydroecium of second level electrodialysis plant 5 by liquid, the dense water of one-level electrodialysis and reverse osmosis carry out ion exchange by liquid, finally give two grades of electrodialysis fresh water and two grades of dense water of electrodialysis；Two grades of dense water of electrodialysis containing monovalent ion meet discharging standards requirement, it is possible to directly discharge.Being also associated with at least one electrodialysis plant after described two grades of electrodialysis plants 5, form multistage electrodialysis structure, the electrodialysis plant that the electrodialysis plant of upper level and reverse osmosis enter to next stage by liquid carries out ion exchange.
Reverse osmosis concentrated liquid, after the filtration of accurate filter 2, enters into the freshwater room of first order electrodialysis plant 3.One-level electrodialysis fresh water enters into first order electrodialysis fresh-water tank 4, carries out follow-up distillation process, and the alcohol obtained carries out regeneration.Two grades of electrodialysis fresh water are back to the entrance of reverse osmosis unit 1.
Determining alcohol in containing alcohol waste water reverse osmosis concentrated solution is 5 ~ 20%, and electrical conductivity is 2000 ~ 4000 μ s/cm, pH is 7.0 ~ 8.5；Reverse osmosis is 5 ~ 20 μ s/cm, pH by the electrical conductivity of liquid is 7.0 ~ 7.5.
The light electrical conductivity of water of one-level electrodialysis is 10 ~ 100 μ s/cm, pH is 7.0 ~ 7.5, and the determining alcohol in one-level electrodialysis fresh water is about 5 ~ 19%.
The dense electrical conductivity of water of one-level electrodialysis is 2000 ~ 4000 μ s/cm, and the determining alcohol in the dense water of one-level electrodialysis is 0.5 ~ 1.5%.
Two grades of light electrical conductivity of waters of electrodialysis are 10 ~ 100 μ s/cm, and the determining alcohol in two grades of electrodialysis fresh water is 0.5 ~ 1.5%.
Containing monovalent ion in two grades of dense water of electrodialysis, electrical conductivity is 2000 ~ 4000 μ s/cm, and in two grades of dense water of electrodialysis, determining alcohol is 100 ~ 500ppm.
Electrodialysis system includes first order electrodialysis plant 3 and second level electrodialysis plant 5, and the operation pressure of electrodialysis system is 0.1 ~ 0.4bar, and operation voltage is 100 ~ 200V, and operation electric current is 2 ~ 4A, and operation temperature is 5 ~ 40 DEG C.
The electrodialysis process process of this method can directly utilize reverse osmosis by liquid as the exchanged water in electrodialysis process process, without using tap water or pure water, save water resource, and in the dense water after processing, the concentration of alcohol is less than 500ppm, it is possible to directly discharged.The accurate filter 2 that the present invention adopts is title, uses accurate filter 2 can prevent electrodialytic membranes from being polluted by solid impurity.The containing alcohol waste water of present invention loss rate of alcohol in desalination processes is very low, loss rate≤10% of alcohol.In dense water after electrodialysis process of the present invention, alcohol content is very low, its COD < 500mg/L, it is possible to directly discharge.The useless electrical conductivity of water of containing alcohol after electrodialysis process is down to 100 below μ s/cm, is substantially reduced in follow-up distillation and concentration process the waste water corrosion to evaporation equipment.
Embodiment 4
A kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution and the steps include: that reverse osmosis charging obtains having the reverse osmosis concentrated liquid of monovalent ion containing alcohol waste water and reverse osmosis to pass through liquid through reverse osmosis unit 1, containing monovalent ion in described reverse osmosis concentrated liquid, described reverse osmosis concentrated liquid enters into the freshwater room of first order electrodialysis plant 3, described part reverse osmosis enters into the dense hydroecium of first order electrodialysis plant 3 by liquid, through first order electrodialysis process, monovalent ion in reverse osmosis concentrated liquid carries out ion exchange through the selective penetrated property of electrodialysis system intermediate ion exchange membrane and obtains one-level electrodialysis fresh water, monovalent ion in reverse osmosis concentrated liquid then moves to reverse osmosis and obtains the dense water of one-level electrodialysis by liquid；The dense water of one-level electrodialysis enters into the freshwater room in the electrodialysis system of the second level, the reverse osmosis of another part then enters into the dense hydroecium of second level electrodialysis plant 5 by liquid, the dense water of one-level electrodialysis and reverse osmosis carry out ion exchange by liquid, finally give two grades of electrodialysis fresh water and two grades of dense water of electrodialysis；Two grades of dense water of electrodialysis containing monovalent ion meet discharging standards requirement, it is possible to directly discharge.
Being also associated with at least one electrodialysis plant after described two grades of electrodialysis plants 5, form multistage electrodialysis structure, the electrodialysis plant that the electrodialysis plant of upper level and reverse osmosis enter to next stage by liquid carries out ion exchange.
Reverse osmosis concentrated liquid, after the filtration of accurate filter 2, enters into the freshwater room of first order electrodialysis plant 3.One-level electrodialysis fresh water enters into first order electrodialysis fresh-water tank 4, carries out follow-up distillation process, and the alcohol obtained carries out regeneration.Two grades of electrodialysis fresh water are back to the entrance of reverse osmosis unit 1.
Determining alcohol in containing alcohol waste water reverse osmosis concentrated solution is 5%, and electrical conductivity is 4000 μ s/cm, pH is 7.0；Reverse osmosis is 20 μ s/cm, pH by the electrical conductivity of liquid is 7.0.
The light electrical conductivity of water of one-level electrodialysis is 10 ~ 100 μ s/cm, pH is 7.0, and the determining alcohol in one-level electrodialysis fresh water is about 5%.
The dense electrical conductivity of water of one-level electrodialysis is 4000 μ s/cm, and the determining alcohol in the dense water of one-level electrodialysis is 0.5%.
Two grades of light electrical conductivity of waters of electrodialysis are 100 μ s/cm, and the determining alcohol in two grades of electrodialysis fresh water is 0.4%.
Containing monovalent ion in two grades of dense water of electrodialysis, electrical conductivity is 4000 μ s/cm, and in two grades of dense water of electrodialysis, determining alcohol is 100mg/L.
Electrodialysis system includes first order electrodialysis plant 3 and second level electrodialysis plant 5, and the operation pressure of electrodialysis system is 0.4bar, and operation voltage is 100V, and operation electric current is 4A, and operation temperature is 5 DEG C.
The electrodialysis process process of this method can directly utilize reverse osmosis by liquid as the exchanged water in electrodialysis process process, without using tap water or pure water, save water resource, and in the dense water after processing, the concentration of alcohol is less than 500ppm, it is possible to directly discharged.The accurate filter 2 that the present invention adopts is title, uses accurate filter 2 can prevent electrodialytic membranes from being polluted by solid impurity.The containing alcohol waste water of present invention loss rate of alcohol in desalination processes is very low, loss rate≤10% of alcohol.In dense water after electrodialysis process of the present invention, alcohol content is very low, its COD < 500mg/L, it is possible to directly discharge.The useless electrical conductivity of water of containing alcohol after electrodialysis process is down to 100 below μ s/cm, is substantially reduced in follow-up distillation and concentration process the waste water corrosion to evaporation equipment.
Embodiment 5
A kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution and the steps include: that reverse osmosis charging obtains having the reverse osmosis concentrated liquid of monovalent ion containing alcohol waste water and reverse osmosis to pass through liquid through reverse osmosis unit 1, containing monovalent ion in described reverse osmosis concentrated liquid, described reverse osmosis concentrated liquid enters into the freshwater room of first order electrodialysis plant 3, described part reverse osmosis enters into the dense hydroecium of first order electrodialysis plant 3 by liquid, through first order electrodialysis process, monovalent ion in reverse osmosis concentrated liquid carries out ion exchange through the selective penetrated property of electrodialysis system intermediate ion exchange membrane and obtains one-level electrodialysis fresh water, monovalent ion in reverse osmosis concentrated liquid then moves to reverse osmosis and obtains the dense water of one-level electrodialysis by liquid；The dense water of one-level electrodialysis enters into the freshwater room in the electrodialysis system of the second level, the reverse osmosis of another part then enters into the dense hydroecium of second level electrodialysis plant 5 by liquid, the dense water of one-level electrodialysis and reverse osmosis carry out ion exchange by liquid, finally give two grades of electrodialysis fresh water and two grades of dense water of electrodialysis；Two grades of dense water of electrodialysis containing monovalent ion meet discharging standards requirement, it is possible to directly discharge.
Reverse osmosis concentrated liquid, after the filtration of accurate filter 2, enters into the freshwater room of first order electrodialysis plant 3.One-level electrodialysis fresh water enters into first order electrodialysis fresh-water tank 4, carries out follow-up distillation process, and the alcohol obtained carries out regeneration.Two grades of electrodialysis fresh water are back to the entrance of reverse osmosis unit 1.
Determining alcohol in containing alcohol waste water reverse osmosis concentrated solution is 20%, and electrical conductivity is 2000 μ s/cm, pH is 8.5；Reverse osmosis is 5 μ s/cm, pH by the electrical conductivity of liquid is 7.3.
The light electrical conductivity of water of one-level electrodialysis is 10 μ s/cm, pH is 7.0, and the determining alcohol in one-level electrodialysis fresh water is about 18.7%.
The dense electrical conductivity of water of one-level electrodialysis is 4000 μ s/cm, and the determining alcohol in the dense water of one-level electrodialysis is 0.5%.
Two grades of light electrical conductivity of waters of electrodialysis are 100 μ s/cm, and the determining alcohol in two grades of electrodialysis fresh water is 1.3%.
Containing monovalent ion in two grades of dense water of electrodialysis, electrical conductivity is 4000 μ s/cm, and in two grades of dense water of electrodialysis, determining alcohol is 450mg/L.
Electrodialysis system includes first order electrodialysis plant 3 and second level electrodialysis plant 5, and the operation pressure of electrodialysis system is 0.4bar, and operation voltage is 100V, and operation electric current is 4A, and operation temperature is 5 DEG C.
The electrodialysis process process of this method can directly utilize reverse osmosis by liquid as the exchanged water in electrodialysis process process, without using tap water or pure water, save water resource, and in the dense water after processing, the concentration of alcohol is less than 500ppm, it is possible to directly discharged.The accurate filter 2 that the present invention adopts is title, uses accurate filter 2 can prevent electrodialytic membranes from being polluted by solid impurity.The containing alcohol waste water of present invention loss rate of alcohol in desalination processes is very low, loss rate≤10% of alcohol.In dense water after electrodialysis process of the present invention, alcohol content is very low, its COD < 500mg/L, it is possible to directly discharge.The useless electrical conductivity of water of containing alcohol after electrodialysis process is down to 100 below μ s/cm, is substantially reduced in follow-up distillation and concentration process the waste water corrosion to evaporation equipment.
Embodiment 6
A kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution and the steps include: that reverse osmosis charging obtains having the reverse osmosis concentrated liquid of monovalent ion containing alcohol waste water and reverse osmosis to pass through liquid through reverse osmosis unit 1, containing monovalent ion in described reverse osmosis concentrated liquid, described reverse osmosis concentrated liquid enters into the freshwater room of first order electrodialysis plant 3, described part reverse osmosis enters into the dense hydroecium of first order electrodialysis plant 3 by liquid, through first order electrodialysis process, monovalent ion in reverse osmosis concentrated liquid carries out ion exchange through the selective penetrated property of electrodialysis system intermediate ion exchange membrane and obtains one-level electrodialysis fresh water, monovalent ion in reverse osmosis concentrated liquid then moves to reverse osmosis and obtains the dense water of one-level electrodialysis by liquid；The dense water of one-level electrodialysis enters into the freshwater room in the electrodialysis system of the second level, the reverse osmosis of another part then enters into the dense hydroecium of second level electrodialysis plant 5 by liquid, the dense water of one-level electrodialysis and reverse osmosis carry out ion exchange by liquid, finally give two grades of electrodialysis fresh water and two grades of dense water of electrodialysis；Two grades of dense water of electrodialysis containing monovalent ion meet discharging standards requirement, it is possible to directly discharge.
Being also associated with at least one electrodialysis plant after described two grades of electrodialysis plants 5, form multistage electrodialysis structure, the electrodialysis plant that the electrodialysis plant of upper level and reverse osmosis enter to next stage by liquid carries out ion exchange.
Reverse osmosis concentrated liquid, after the filtration of accurate filter 2, enters into the freshwater room of first order electrodialysis plant 3.One-level electrodialysis fresh water enters into first order electrodialysis fresh-water tank 4, carries out follow-up distillation process, and the alcohol obtained carries out regeneration.Two grades of electrodialysis fresh water are back to the entrance of reverse osmosis unit 1.
Determining alcohol in containing alcohol waste water reverse osmosis concentrated solution is 15%, and electrical conductivity is 3000 μ s/cm, pH is 7.5；Reverse osmosis is 12 μ s/cm, pH by the electrical conductivity of liquid is 7.2.
The light electrical conductivity of water of one-level electrodialysis is 80 μ s/cm, pH is 7.4, and the determining alcohol in one-level electrodialysis fresh water is about 14%.
The dense electrical conductivity of water of one-level electrodialysis is 2800 μ s/cm, and the determining alcohol in the dense water of one-level electrodialysis is 1%.
Two grades of light electrical conductivity of waters of electrodialysis are 30 μ s/cm, and the determining alcohol in two grades of electrodialysis fresh water is 1%.
Containing monovalent ion in two grades of dense water of electrodialysis, electrical conductivity is 2400 μ s/cm, and in two grades of dense water of electrodialysis, determining alcohol is 300mg/L.
Electrodialysis system includes first order electrodialysis plant 3 and second level electrodialysis plant 5, and the operation pressure of electrodialysis system is 0.3bar, and operation voltage is 150V, and operation electric current is 3A, and operation temperature is 25 DEG C.
The electrodialysis process process of this method can directly utilize reverse osmosis by liquid as the exchanged water in electrodialysis process process, without using tap water or pure water, save water resource, and in the dense water after processing, the concentration of alcohol is less than 500ppm, it is possible to directly discharged.The accurate filter 2 that the present invention adopts is title, uses accurate filter 2 can prevent electrodialytic membranes from being polluted by solid impurity.The containing alcohol waste water of present invention loss rate of alcohol in desalination processes is very low, loss rate≤10% of alcohol.In dense water after electrodialysis process of the present invention, alcohol content is very low, its COD < 500mg/L, it is possible to directly discharge.The useless electrical conductivity of water of containing alcohol after electrodialysis process is down to 100 below μ s/cm, is substantially reduced in follow-up distillation and concentration process the waste water corrosion to evaporation equipment.
Embodiment 7
A kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution, it is characterized in that: the freshwater room that the containing alcohol Waste water concentrating liquid after reverse-osmosis treated enters in electrodialysis system, reverse osmosis is simultaneously into the dense hydroecium in two-stage electrodialysis system by liquid.In first order electrodialysis system, monovalent ion in reverse osmosis concentrated liquid utilizes the selective penetrated property of electrodialysis system intermediate ion exchange membrane to realize ion exchange, move to reverse osmosis and obtain one-level electrodialysis fresh water by liquid, one-level electrodialysis fresh water is carried out follow-up distillation process, and the alcohol obtained carries out regeneration；Reverse osmosis after ion exchange contains a small amount of alcohol and monovalent ion by liquid, is called the dense water of one-level electrodialysis.
The dense water of one-level electrodialysis enters into the freshwater room in two grades of electrodialysis systems, then carries out ion exchange with reverse osmosis by liquid, finally gives two grades of electrodialysis fresh water and two grades of dense water of electrodialysis.Containing only there being a small amount of alcohol in two grades of electrodialysis fresh water, return to counter-infiltration system entrance；Two grades of dense water of electrodialysis containing monovalent ion meet discharging standards requirement, it is possible to directly discharge.
In order to better solve above-mentioned technical problem, the further technical scheme of the present invention is:
The described determining alcohol in the containing alcohol waste water reverse osmosis concentrated solution of airport is 0.5 ~ 20%, electrical conductivity is 2000 ~ 4000 μ s/cm, pH is 7.0 ~ 8.5；Reverse osmosis is 5 ~ 20 μ s/cm, pH by the electrical conductivity of liquid is 7.0 ~ 7.5.
Reverse osmosis concentrated liquid enters into the freshwater room of one-level electrodialysis system, obtains one-level electrodialysis fresh water and the dense water of one-level electrodialysis after process.Reverse osmosis simultaneously enters the dense hydroecium of two-stage electrodialysis system by liquid.
The dense water of one-level electrodialysis enters into two grades of electrodialysis freshwater rooms and processes, and obtains two grades of electrodialysis fresh water and two grades of dense water of electrodialysis.
Described one-level electrodialysis fresh water electrical conductivity is 10 ~ 100 μ s/cm, pH is 7.0 ~ 8.0, and the determining alcohol in water is about 5 ~ 19%, reaches the level of regeneration after carrying out distillation and concentration；
The described dense electrical conductivity of water of one-level electrodialysis is 2000 ~ 4000 μ s/cm, and the determining alcohol in water is 0.5 ~ 1.5%.
Two grades of described light electrical conductivity of waters of electrodialysis are 10 ~ 100 μ s/cm, and the determining alcohol in water is 0.5 ~ 1.5%, and the water inlet returning to counter-infiltration system carries out reverse osmosis concentration；
Containing monovalent ion in described two grades of dense water of electrodialysis, electrical conductivity is 2000 ~ 4000 μ s/cm, and in two grades of dense water of electrodialysis, determining alcohol is 100 ~ 500mg/L, and its COD is lower than 500mg/L, it is possible to directly discharge.
Electrodialysis system includes first order electrodialysis plant 3 and second level electrodialysis plant 5, and the operation pressure of described electrodialysis system is 0.1 ~ 0.4bar, and operation voltage is 100 ~ 200V, and operation electric current is 2 ~ 4A, and operation temperature is 5 ~ 40 DEG C.
Embodiment 8
A kind of airport containing alcohol waste water is after reverse-osmosis treated, and the determining alcohol in its concentrated solution is 5%, and electrical conductivity is 2000 μ s/cm, and pH value is 8.3, and reverse osmosis is 5 μ s/cm, pH by the electrical conductivity of liquid is 7.2.Reverse osmosis concentrated liquid enters into the freshwater room of one-level electrodialysis system after accurate filter 2, and reverse osmosis enters dense hydroecium by liquid, and the feed liquid flow of freshwater room and dense hydroecium is 300L/H, and temperature is 10 ~ 20 DEG C.The operation voltage of electrodialysis system is 200V, and operation electric current is 2A.After process, the electrical conductivity of freshwater room liquid is 30 μ s/cm, and determining alcohol is 4.7%, enters in fresh-water tank；The dense water of one-level electrodialysis enters two grades of freshwater rooms, and reverse osmosis water outlet enters two grades of dense hydroeciums.In two grades of fresh water after process, determining alcohol is about 0.3%, returns to reverse osmosis charging place, and two grades of dense electrical conductivity of waters of electrodialysis are 2000 μ s/cm, and determining alcohol is about 50 ~ 100ppm, COD < 100mg/L, it is possible to directly discharge.
Embodiment 9
Determining alcohol in a kind of containing alcohol waste water reverse osmosis concentrated solution is 20%, and electrical conductivity is 4000 μ s/cm, and pH value is 8.0, and the electrical conductivity in reverse osmosis water outlet is 10 μ s/cm.Reverse osmosis concentrated liquid enters into the freshwater room of one-level electrodialysis system after accurate filter 2, and reverse osmosis water outlet enters dense hydroecium, and the feed liquid flow of freshwater room and dense hydroecium is 300L/H, and temperature is 10 ~ 20 DEG C.The operation voltage of electrodialysis system is 250V, and operation electric current is 3A.After process, the electrical conductivity of freshwater room liquid is 90 μ s/cm, and determining alcohol is about 18.8%, enters in fresh-water tank；The dense water of one-level electrodialysis enters two grades of freshwater rooms, and reverse osmosis water outlet enters two grades of dense hydroeciums.In two grades of fresh water after process, determining alcohol is about 1.2%, returns to reverse osmosis charging place, and two grades of dense electrical conductivity of waters of electrodialysis are 4000 μ s/cm, and determining alcohol is about 250 ~ 400ppm, COD < 400mg/L, it is possible to directly discharge.
Embodiment 10
On the basis of embodiment 1, the operation voltage controlling electrodialysis system is 200V, and operation electric current is 3A.After process, the electrical conductivity of freshwater room liquid is 15 μ s/cm, and determining alcohol is about 4.8%, enters in fresh-water tank；The dense water of one-level electrodialysis enters two grades of freshwater rooms, and reverse osmosis water outlet enters two grades of dense hydroeciums.In two grades of fresh water after process, determining alcohol is about 0.2%, returns to reverse osmosis charging place, and the conductance of two grades of dense water of electrodialysis is 2000 μ s/cm, and determining alcohol is about 100 ~ 200ppm, COD < 200mg/L, it is possible to directly discharge.
Embodiment 11
On the basis of embodiment 9, the operation voltage controlling electrodialysis system is 200V, and operation electric current is 4A.After process, the electrical conductivity of freshwater room liquid is 70 μ s/cm, and determining alcohol is about 18.5%, enters in fresh-water tank；And the dense water of one-level electrodialysis enters two grades of freshwater rooms, reverse osmosis water outlet enters two grades of dense hydroeciums.In two grades of fresh water after process, determining alcohol is about 1.5%, returns to reverse osmosis charging place, and two grades of dense electrical conductivity of waters of electrodialysis are 2000 ~ 4000 μ s/cm, and determining alcohol is about 400 ~ 500ppm, COD < 500mg/L, it is possible to directly discharge.
Patent of the present invention is not limited to above-mentioned disclosed embodiment, and every content described in the claims and combination broadly fall into present invention protection.
Claims (10)
1. remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution for one kind, it is characterized in that: the steps include: that reverse osmosis charging obtains having the reverse osmosis concentrated liquid of monovalent ion containing alcohol waste water and reverse osmosis to pass through liquid through reverse osmosis unit (1), containing monovalent ion in described reverse osmosis concentrated liquid, described reverse osmosis concentrated liquid enters into the freshwater room of first order electrodialysis plant (3), part reverse osmosis enters into the dense hydroecium of first order electrodialysis plant (3) by liquid, through first order electrodialysis process, monovalent ion in reverse osmosis concentrated liquid carries out ion exchange through the selective penetrated property of electrodialysis system intermediate ion exchange membrane and obtains one-level electrodialysis fresh water, monovalent ion in reverse osmosis concentrated liquid then moves to reverse osmosis and obtains the dense water of one-level electrodialysis by liquid；The dense water of one-level electrodialysis enters into the freshwater room in the electrodialysis system of the second level, the reverse osmosis of another part then enters into the dense hydroecium of second level electrodialysis plant (5) by liquid, the dense water of one-level electrodialysis and reverse osmosis carry out ion exchange by liquid, finally give two grades of electrodialysis fresh water and two grades of dense water of electrodialysis；Two grades of dense water of electrodialysis containing monovalent ion meet discharging standards requirement.
2. according to claim 1 a kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution, it is characterized in that: after described two grades of electrodialysis plants (5), be also associated with at least one electrodialysis plant, forming multistage electrodialysis structure, the electrodialysis plant that the electrodialysis plant of upper level and reverse osmosis enter to next stage by liquid carries out ion exchange.
3. according to claim 1 a kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution, it is characterised in that: described reverse osmosis concentrated liquid, after the filtration of accurate filter (2), enters into the freshwater room of first order electrodialysis plant (3)；Described one-level electrodialysis fresh water enters into first order electrodialysis fresh-water tank (4), carries out follow-up distillation process, and the alcohol obtained carries out regeneration.
4. according to claim 1 a kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution, it is characterised in that: described two grades of electrodialysis fresh water are back to the entrance of reverse osmosis unit (1).
5. a kind of according to claim 1-4 any one removes the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution, it is characterized in that: the determining alcohol in described containing alcohol waste water reverse osmosis concentrated solution is 5 ~ 20%, electrical conductivity is 2000 ~ 4000 μ s/cm, pH is 7.0 ~ 8.5；Reverse osmosis is 5 ~ 20 μ s/cm, pH by the electrical conductivity of liquid is 7.0 ~ 7.5.
6. according to claim 5 a kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution, it is characterized in that: the described light electrical conductivity of water of one-level electrodialysis is 10 ~ 100 μ s/cm, pH is 7.0 ~ 8.0, and the determining alcohol in one-level electrodialysis fresh water is 5 ~ 19%.
7. according to claim 6 a kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution, it is characterised in that: the described dense electrical conductivity of water of one-level electrodialysis is 2000 ~ 4000 μ s/cm, and the determining alcohol in the dense water of one-level electrodialysis is 0.5 ~ 1.5%.
8. according to claim 7 a kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution, it is characterised in that: described two grades of light electrical conductivity of waters of electrodialysis are 10 ~ 100 μ s/cm, and the determining alcohol in two grades of electrodialysis fresh water is 0.5 ~ 1.5%.
9. according to claim 8 a kind of remove the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution, it is characterized in that: containing monovalent ion in described two grades of dense water of electrodialysis, electrical conductivity is 2000 ~ 4000 μ s/cm, in two grades of dense water of electrodialysis, determining alcohol is 100 ~ 500ppm, COD < 500mg/L.
10. a kind of according to claim 1-4,6-9 any one removes the method for monovalent ion in containing alcohol waste water reverse osmosis concentrated solution, it is characterized in that: electrodialysis system includes first order electrodialysis plant (3) and second level electrodialysis plant (5), the operation pressure of electrodialysis system is 0.1 ~ 0.4bar, operation voltage is 100 ~ 250V, operation electric current is 2 ~ 4A, and operation temperature is 5 ~ 40 DEG C.
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Effective date of registration: 20171222 Address after: 610041 Sichuan City, Chengdu Province, No. two ring road, south section of No. two, No. 17 Patentee after: Chengdu Newave Aerochemical Co., Ltd. Address before: 610041 Sichuan City, Chengdu Province, No. two ring road, south section of No. two, No. 17 Patentee before: No.2 Inst, China Civil Aviation General Bureau |