CN110104741A - Double film room membrane capacitance demineralizers with continuous water-yielding capacity - Google Patents

Double film room membrane capacitance demineralizers with continuous water-yielding capacity Download PDF

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Publication number
CN110104741A
CN110104741A CN201910479412.0A CN201910479412A CN110104741A CN 110104741 A CN110104741 A CN 110104741A CN 201910479412 A CN201910479412 A CN 201910479412A CN 110104741 A CN110104741 A CN 110104741A
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China
Prior art keywords
water
film room
membrane capacitance
room
double film
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Pending
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CN201910479412.0A
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Chinese (zh)
Inventor
张海丰
王胜利
鲁斌
薛志英
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Northeast Electric Power University
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Northeast Dianli University
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Priority to CN201910479412.0A priority Critical patent/CN110104741A/en
Publication of CN110104741A publication Critical patent/CN110104741A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • C02F1/4691Capacitive deionisation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • C02F1/4693Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/002Construction details of the apparatus
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/14Maintenance of water treatment installations
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/16Regeneration of sorbents, filters

Abstract

The invention discloses a kind of double film room membrane capacitance demineralizers with continuous water-yielding capacity, structure is: double film room membrane capacitance components set that there are two film room, graphite electrode, active carbon fiber fabrics, cation-exchange membrane and anion-exchange membranes etc..Raw water box connects intake pump, and the outlet of intake pump is connected with two film rooms of double film room membrane capacitance components respectively, and water after processing enters water exit converter and is divided into water purification and condensed water.Water exit converter is set there are two water outlet, and water purification is discharged by fresh water mouth;Condensed water is discharged by concentrated water spout and is back to raw water box.Water exit converter is equipped with signal wire and connects with the time relay, and time signal is passed to the device of falling pole, and the device of falling pole controls the conversion of two graphite electrode positive-negative polarities according to the signal.System combined ion concentration Polarization technique and membrane capacitance desalination technology, it is synchronous to realize freshwater room desalination and concentrated water room regenerative process, so as to continuous effluent;The electric energy of concentrated water room regenerative process release can recycle in situ, effectively reach energy saving purpose.

Description

Double film room membrane capacitance demineralizers with continuous water-yielding capacity
Technical field
The invention belongs to water treatment technologies, and in particular to a kind of demineralizer for handling brackish water.
Background technique
With the development of industry and rural urbanization, freshwater resources crisis is got worse.The one side mankind can utilize fresh water Resource reserve is reduced;Another aspect great lot of water resources is since artificial origin is contaminated, thus sea water desalination becomes solution and works as The important channel of preceding shortage of fresh water.The desalination technology of water and corresponding efficiently demineralizer exploitation have become domestic and international water Handle professional's focus of attention.Currently, the typical technique of water desalination technology include: ion exchange, multistage flash distillation (MSF), Multi-effect distilling (MED), reverse osmosis (RO) etc., above-mentioned desalination technology although obtain relatively broad application, so in practical projects And the defects of there is secondary pollution, high energy consumption, poor efficiency.Therefore, a kind of environmental-friendly, energy-efficient desalination skill is developed Art has become the field urgent problem to be solved.
There is environmental-friendly, without secondary pollution, easy to operate, land occupation less with the electric desalination technology that electrodialysis (ED) is representative The advantages that, by extensive concern both domestic and external.Compared with reverse osmosis (RO), electrodialysis (ED) technology removing for low saline salinity water Salt odds for effectiveness is obvious, and especially recent someone constructs novel electrodialysis desalination plant (ICP- using concentration polarization theoretical (ICP) ED).New device have the advantages that current utilization efficiency it is high, to treating nature water require it is low (Scientific Reports, 2016,25349) it is 1.5 times of sodium ion that, mechanism, which is chloride ion migration rate under phase same electric field, thus according to concentration polarization Change theory, as long as removing sodium ion, chloride ion can be automatically removed.Novel demineralization plant (ICP-ED) uses cation-exchange membrane structure Electrodialysis plant is built, current utilization efficiency is effectively increased.However, the polarization phenomena and faraday in electrodialysis (ED) technology are anti- It answers, significantly impacts the large-scale application of the technique.
The advantages that membrane capacitance desalination technology (MCDI) is due to its low cost, energy conservation and environmental protection has developed into a kind of emerging Desalting technology.Lee et al. is improved on the basis of capacitor desalination technology (CDI), constructs membrane capacitance demineralizer for the first time (Desalination,2006,196:125-134).Compared with capacitor desalination technology, due to being covered each by positive and negative electrode Anion and cation exchange membrane has obstructed jack per line ionic adsorption, thus significantly improves the adsorption capacity of membrane capacitance demineralizer and remove Salt efficiency.Although to be regenerated after there are membrane capacitance desalination technology many merits, two lateral electrodes to be saturated to ionic adsorption Process causes technique interval to be discharged, and this strongly limits the application of the technique in practical projects.Membrane capacitance desalination is substantially It is capacitor charge and discharge process, during electrode regeneration, how to recycle the energy of storage is the energy-efficient demineralizer of exploitation It is crucial.
The invention proposes a kind of demineralizers can be satisfied in conjunction with membrane capacitance desalination mechanism with lower cost Production water effect.
Summary of the invention
The object of the present invention is to propose a kind of double film room membrane capacitance demineralizers with continuous water-yielding capacity, Electro Sorb And it is electrically regenerative synchronously complete, reach continuous and produce water and energy-efficient purpose.
Double film room membrane capacitance demineralizers with continuous water-yielding capacity, including raw water box, intake pump, double film rooms membrane capacitance Component, the time relay, the device of falling pole, water exit converter and DC power supply etc., demineralizer is by desalination and automatic control two System is constituted.For realize goal of the invention, adopted the technical scheme that: double film room membrane capacitance components set there are two film room, a pair Graphite electrode, a pair of of active carbon fiber fabrics, a pair of of cation-exchange membrane and an anion-exchange membrane.Raw water box connection water inlet Pump, the outlet of intake pump are connected with the first film room of double film room membrane capacitance components, the second film room respectively, after two film rooms are handled Water enter water exit converter and be converted into water purification and condensed water.Water exit converter is set there are two water outlet, and water purification is arranged by fresh water mouth Out;Condensed water is discharged by concentrated water spout and is back to raw water box.Water exit converter is equipped with signal wire and connects with the time relay, the time Signal is passed to the device of falling pole, and the device of falling pole controls the conversion of two graphite electrode positive-negative polarities according to the signal.
Double film room membrane capacitance components use symmetric design, by graphite electrode, active carbon fiber fabrics, cation-exchange membrane, yin Amberplex composition, wherein a pair of cation-exchange membrane disposed in parallel and intermediate anion-exchange membrane form double film rooms, That is freshwater room and concentrated water room.
Raw water passes through double film rooms of membrane capacitance component when operation, and the cation permeable cation in freshwater room in raw water is handed over It changes film to be adsorbed by active carbon fiber fabrics, anion-permeable anion-exchange membrane enters concentrated water room, and raw water is purified in freshwater room. When active carbon fiber fabrics Liquidity limit saturation, by the robot control system(RCS) operation of falling pole, the active carbon fiber fabrics of adsorption saturation are real Now regenerate, and corresponding concentrated water room is converted into freshwater room, thus realize continuous production water.In addition, being regenerated in active carbon fiber fabrics Process, its essence is discharge process, the electric energy of release, which can realize the ion in freshwater room, to be migrated, can in-situ accomplishes energy time It receives.
The present invention has combined ion concentration Polarization technique and membrane capacitance desalination technology, and coupling technique has synergistic effect, tool Body shows themselves in that under applying direct current electric field effect, double film room membrane capacitance components form freshwater room and concentrated water room, and wherein freshwater room is sent out To concentrated water room transition process, cationic desorption process occurs for concentrated water room, synchronous to realize freshwater room for raw Cation adsorption and anion Desalination and concentrated water room regenerative process, to complete continuous effluent;The electric energy of concentrated water room regenerative process release can recycle in situ, realize Energy-efficient purpose.
The features of the present invention and the beneficial effect of generation are that (1) is based on ion concentration polarization desalination theory, input Electric energy is only used to migrate cation, to improve current efficiency;(2) same while freshwater room desalination using double film room designs Step completes the electrically regenerative process in concentrated water room, realizes continuous production water;(3) electric energy that the electrically regenerative process in concentrated water room is discharged can realize original position Recycling, reaches energy-efficient purpose.
Detailed description of the invention
Shown attached drawing 1 is the principle and each component connection schematic diagram of present system.Solid line in figure indicates equipment connection Pipeline;Dotted line indicates electric wire or control signal lines.
Implement concrete mode
Structure of the invention is described further below in conjunction with attached drawing and by specific embodiment.
Double film room membrane capacitance demineralizers with continuous water-yielding capacity, by desalting system and automatic control system two parts It constitutes, desalting system is made of raw water box, intake pump, double film room membrane capacitance components;Automatic control system by the time relay, fall Pole device, water exit converter, DC power supply composition.Its specific structure composition is: double film room membrane capacitance components are equipped with the first film room 3-1 With the second film room 3-2, a pair of of graphite electrode 4, a pair of of active carbon fiber fabrics 5, a pair of of cation-exchange membrane 6 and an anion Exchange membrane 7.Raw water box 1 connects intake pump 2, and intake pump exports the first, second film room with double film room membrane capacitance components respectively It is connected, through treated for two film rooms, water enters water exit converter 8 is divided into water purification and condensed water.Water exit converter goes out there are two setting The mouth of a river, water purification are discharged by fresh water mouth 9-1;Condensed water is discharged by concentrated water spout 9-2 and is back to raw water box.Water exit converter is equipped with letter Number line connects with the time relay 10, and time signal is passed to the device of falling pole 11, and the device of falling pole controls two graphite electrodes according to the signal The conversion of positive-negative polarity.The device of falling pole is connected with DC power supply 12, and the voltage of DC power supply output is 0.8-1.2V.
The flow velocity of two water outlets of water exit converter is identical, is 1-5mL/min.
Gap is equipped between cation-exchange membrane and anion-exchange membrane, the spacing in gap is 0.5-1.0mm.
Embodiment 1:
Embodiment raw water is tap water, and conductivity is 158~170 μ S/cm, turbidity 0.8-1.1NTU.Double film rooms film electricity Hold desalination modular construction parameter: cation-exchange membrane is 0.5mm, two sides active carbon fiber fabrics quality with anion-exchange membrane spacing It is 2.0g;Fresh water and the flow velocity of concentrated water are 1mL/min, and the voltage of DC power supply output is 0.8V;Time relay control is fallen The pole time is 90min.
Results of experimental operation shows: current efficiency >=106%, and the electric energy rate of recovery is 58%, water purification conductivity≤0.1 μ S/ Cm, turbidity are not detected, and device water outlet fully meets " thermal power generation unit and apparatus of steam power plants Water Vapor Quality " (GB/ T12145-2016) standard.
Embodiment 2:
Embodiment raw water is tap water, and conductivity is 145~160 μ S/cm, turbidity 1.0-1.5NTU.Double film rooms film electricity Hold desalination modular construction parameter: cation-exchange membrane is 0.7mm, two sides active carbon fiber fabrics quality with anion-exchange membrane spacing It is 2.0g;Fresh water and the flow velocity of concentrated water are 3mL/min, and the voltage of DC power supply output is 1.0V;Time relay control is fallen The pole time is 90min.
Results of experimental operation shows: current efficiency >=108%, and the electric energy rate of recovery is 43%, water purification conductivity≤0.1 μ S/ Cm, turbidity are not detected, and device water outlet fully meets " thermal power generation unit and apparatus of steam power plants Water Vapor Quality " (GB/ T12145-2016) standard.
Embodiment 3:
Embodiment raw water is tap water, and conductivity is 157~183 μ S/cm, turbidity 1.2-1.5NTU.Double film rooms film electricity Hold desalination modular construction parameter: cation-exchange membrane is 1.0mm, two sides active carbon fiber fabrics quality with anion-exchange membrane spacing It is 2.0g;Fresh water and the flow velocity of concentrated water are 5mL/min, and the voltage of DC power supply output is 1.2V;Time relay control is fallen The pole time is 90min.
Results of experimental operation shows: current efficiency >=104%, and the electric energy rate of recovery is 37%, water purification conductivity≤0.1 μ S/ Cm, turbidity are not detected, and device water outlet fully meets " thermal power generation unit and apparatus of steam power plants Water Vapor Quality " (GB/ T12145-2016) standard.
The system and device has fully considered that conventional film capacitive means are discharged discontinuous feature, double film rooms film electricity in design Hold component and use symmetric design, application time relay is to the device of falling pole and water exit converter centralized control.In addition, being based on concentration polarization Change theory, uses a pair of of cation-exchange membrane and anion-exchange membrane constructs pair film rooms, so effectively increasing current efficiency.

Claims (4)

1. double film room membrane capacitance demineralizers with continuous water-yielding capacity, including raw water box, intake pump, double film room membrane capacitance groups Part, the time relay, the device of falling pole, water exit converter and DC power supply, it is characterized in that: the demineralizer is by desalination and automatic control Two systems processed are constituted, and double film room membrane capacitance components set that there are two film room (3-1,3-2), a pair of of graphite electrode (4), a pair of of activity Carbon fiber sheet (5), a pair of of cation-exchange membrane (6) and an anion-exchange membrane (7), raw water box (1) connect intake pump (2), the outlet of intake pump is connected with the first film room of double film room membrane capacitance components, the second film room respectively, handles through two film rooms Water afterwards enters water exit converter (8) and is divided into water purification and condensed water, and water exit converter sets that there are two water outlets, and water purification is by fresh water mouth (9-1) discharge;Condensed water is discharged by concentrated water spout (9-2) and is back to raw water box, water exit converter be equipped with signal wire and time after Electric appliance (10) connects, and time signal is passed to the device of falling pole (11), and the device of falling pole controls two graphite electrode positive-negative polarities according to the signal Conversion.
2. according to described in claim 1 with continuous water-yielding capacity double film room membrane capacitance demineralizers, it is characterized in that: it is described out The flow velocity of two water outlets of water converter is identical, is 1-5mL/min.
3. according to double film room membrane capacitance demineralizers described in claim 1 with continuous water-yielding capacity, it is characterized in that: the sun Gap is equipped between amberplex and anion-exchange membrane, the spacing in gap is 0.5-1.0mm.
4. according to described in claim 1 with continuous water-yielding capacity double film room membrane capacitance demineralizers, it is characterized in that: it is described Pole device is connected with DC power supply (12), and the voltage of DC power supply output is 0.8-1.2V.
CN201910479412.0A 2019-06-04 2019-06-04 Double film room membrane capacitance demineralizers with continuous water-yielding capacity Pending CN110104741A (en)

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CN110627170A (en) * 2019-10-09 2019-12-31 东北电力大学 Defluorination device without concentrated water discharge

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110627170A (en) * 2019-10-09 2019-12-31 东北电力大学 Defluorination device without concentrated water discharge
CN110627170B (en) * 2019-10-09 2022-03-15 东北电力大学 Defluorination device without concentrated water discharge

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