CN202465430U - Seawater desalination device - Google Patents

Seawater desalination device Download PDF

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Publication number
CN202465430U
CN202465430U CN201220123365XU CN201220123365U CN202465430U CN 202465430 U CN202465430 U CN 202465430U CN 201220123365X U CN201220123365X U CN 201220123365XU CN 201220123365 U CN201220123365 U CN 201220123365U CN 202465430 U CN202465430 U CN 202465430U
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reverse osmosis
water
import
low pressure
connects
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张世文
宁鹏
秦婧
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Boying Xiamen Science and Technology Co Ltd
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Boying Xiamen Science and Technology Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination
    • Y02A20/131Reverse-osmosis

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Abstract

The utility model discloses a seawater desalination device, which relates to a seawater device combining an electrolysis technology, a capacitive adsorption deionization technology and a low pressure reverse osmosis technology. The device is provided with an electrolytic purification system, a capacitive adsorption deionization system and a low pressure reverse osmosis system, wherein the electrolytic purification system is provided with a cut-off valve, a water supply pump, an electrolysis machine, a setting tank and a micro-filtration device; the capacitive adsorption deionization system is provided with a cut-off valve, a lifting pump, a cartridge filter, a water supply pump, a capacitive adsorption deionization device, a primary fresh water storage tank and a concentrated water booster pump; and the low pressure reverse osmosis system is provided with a cut-off valve, a water supply pump, a cartridge filter, a high pressure pump, a low pressure reverse osmosis membrane component and a fresh water storage tank. Electrolysis is firstly performed; then primary desalination of capacitive adsorption deionization is performed; and finally, low pressure reverse osmosis desalination is performed. The seawater desalination device has the advantages of short process flow, less investment, less environmental pollution, low requirement on reverse osmosis system materials, low cost, capability of solving the problem of domestication, high desalination efficiency, low energy consumption, low production cost, high equipment integration, small size, easiness in operation and the like.

Description

A kind of sea water distiling plant
Technical field
The utility model relates to a kind of sea water distiling plant, particularly relates to the seawater device that a kind of electrolysis tech, capacitive adsorption deionizing technology and low pressure reverse osmosis technology combine.
Background technology
The total reserves of water globe is 13.86 hundred million km 3, seawater just occupies 96.5%, and face of land fresh water and shallow-layer fresh groundwater that the mankind can take are merely 0.79%, and inhomogeneous with region and seasonal variation distributed pole.Shortage of fresh water has become one of three overall situation problems of 21 century.Want water, want resource to the sea; It is the Real Choice that solves coastal (coastal waters) regional shortage of fresh water; Also be to realize sustainable utilization of water resource, ensure the vital measure of the coastland sustainable development of socio-economy, be of great immediate significance and strategic importance.Therefore, sea water desaltination and direct seawater utilization technology become the new and high technology that various countries pay much attention to, and also are one of important measures that solve China's water resources crisis.
Contain a large amount of salt in the seawater, from seawater, remove salt, extracting fresh water is the dream that the mankind have pursued the centuries.As far back as the epoch of the big navigation in the world, British royal family was just once put on someone's head and was solicited economical method for desalting seawater.Even to this day; More than the method for sea water desaltination both at home and abroad is existing hundreds of, mainly contain distillation method, cold method, reverse osmosis method, sun power method, low-temperature multi-effect, MSF, electroosmose process, pressure steam distillation, circulation electric capacity absorption method, dew point method of evaporation, water power coproduction, hotting mask coproduction etc.These methods, otherwise efficient is not high, otherwise energy consumption is big, and uneconomical.In these methods, reverse osmosis method has been obtained very big technical progress through the development of decades, and its advantage is that the efficient of sea water desaltination is higher, and scale can be carried out personalized design as required, and throughput is big; But its weak point is also more outstanding: the one, and cost is high, if adopt the single-stage desalination by reverse osmosis, the boron and the bromide of product (desalination water) exceed standard, and do not meet GB5749-2006 " drinking water sanitary standard ", can not be as Drinking Water; If adopt secondary or multistage desalination by reverse osmosis, product (desalination water) is though can reach GB5749-2006 " drinking water sanitary standard ", and production cost is again than higher.The 2nd, energy consumption is big (generally greater than 3KWh/m 3, how at 4 ~ 4.5KWh/m 3).The 3rd, also big to the degree of dependence of film, the life-span is lacked (general about 2 years), needs the periodic replacement membrane module, weighs from economical standard, and is still not fully up to expectations.The 4th, high to pretreated requirement, the reverse osmosis membrane technology that generally uses adopts the interpolation flocculation agent to carry out pre-treatment, not only increases cost, and has added new chemical substance, thereby the risk that causes the secondary chemical pollution is arranged.
Thereby for satisfying growing water needs, but a kind of heavy-duty service for a long time of research and development, output height, energy consumption is little, cost is low, the desalination technology of long large-scale application of life-span and equipment thereof are extremely urgent.
The utility model content
The purpose of the utility model is the deficiency that exists to existing sea water distiling plant, and the sea water distiling plant that a kind of desalting efficiency is high, energy consumption is low, material is cheap, the life-span is long, production cost is low, environmental pollution is little, device integration is high, simple to operate is provided.
The said sea water distiling plant of the utility model is provided with electrolytic purification system, capacitive adsorption deionizing system and low pressure reverse osmosis system.
Said electrolytic purification system is used for that seawater is carried out electrolytic cleaning and handles; Electrolytic purification system is provided with stopping valve, working shaft, electrolysis machine, setting tank and micro-filtration; The external seawater water storing tank of the import of stopping valve; The import of working shaft connects the outlet of stopping valve; The water supply pump outlet connects the import of electrolysis machine; The outlet of electrolysis machine connects the import of setting tank, and the outlet of setting tank connects the import of micro-filtration, and the outlet of micro-filtration connects with the water-in of capacitive adsorption deionizing system;
Said electrolysis machine is provided with power supply and electrolyzer; Electrode materials in the said electrolyzer is a kind of in alloy and the nano-catalytic noble electrode of graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, metal.The top layer of said nano-catalytic noble electrode is coated with the MOX inertia catalyst coatings that crystal grain is 10~35nm; The substrate of said nano-catalytic noble electrode can be titanium plate or plastic plate etc.; It is active that kind electrode has higher electrocatalytic reaction; Can reduce electrolytic overpotential significantly, reduce the generation of side reaction.
Said capacitive adsorption deionizing system is used for electrolytic purification system is handled the purifying sea water of gained and further handles, and is 110V/m ~ 2 * 10 at volts DS 6Under the condition of V/m, realizing preliminary desalination, is that the sea water desalinization of 20000~35000 μ s/cm is 2000~5000 μ s/cm to specific conductivity with specific conductivity, obtains elementary fresh water; The capacitive adsorption deionizing system is provided with stopping valve, lift pump, security personnel's strainer, working shaft, capacitive adsorption deionizing apparatus, elementary fresh water basin and condensed water topping-up pump; The import of said stopping valve connects the outlet of the electrolysis machine of electrolytic purification system; The stopping valve outlet connects the import of lift pump; Promote the import that pump outlet connects security personnel's strainer, the outlet of security personnel's strainer connects the import of working shaft, and the import of working shaft connects the import of capacitive adsorption deionizing apparatus; The dialysis water out of capacitive adsorption deionizing apparatus connects the import of elementary fresh water basin, and the outlet of elementary fresh water basin connects with the import of low pressure reverse osmosis system; The capacitive adsorption deionizing system with working shaft pumps into capacitive adsorption deionizing apparatus through security personnel behind the strainer with electrolytic purification system gained purifying sea water, through capacitive adsorption deionizing apparatus handle dialysis water and condensed water, dialysis water gets into basin and gets elementary fresh water; Condensed water recycles through condensed water topping-up pump backflow entering electrolytic purification system;
It is the titanium-base anode of the coating of metal oxides of 10~35nm that the anode of said capacitive adsorption deionizing apparatus adopts surface coverage that crystal grain is arranged; Said anode is tabular anode, circular-arc anode, cylindric anode or meshed anode; The negative electrode of said capacitive adsorption deionizing apparatus is titanium negative electrode, iron cathode, aluminium negative electrode, stainless steel cathode, zinc negative electrode, cathode, nickel cathode, lead electrode or graphite cathode, and said negative electrode is circular-arc negative electrode, cylindric negative electrode or mesh cathode; Said capacitive adsorption deionizing apparatus leaves standstill through short circuit, makes electrode regeneration, realizes back flushing; Said back flushing can require to select one-level backwash, secondary backwash, three grades of backwashes or level Four backwash according to water inlet condition and producing water ratio.
Said low pressure reverse osmosis system is used for the elementary fresh water of specific conductivity 2000~5000 μ s/cm of capacitive adsorption deionizing system handles gained is filtered, separates; Must dialyse water and condensed water; The low pressure reverse osmosis system is provided with stopping valve, working shaft, security personnel's strainer, HPP, low pressure reverse osmosis membrane module and fresh water basin; The import of stopping valve connects the outlet of the elementary fresh water basin of capacitive adsorption deionizing system; The outlet of stopping valve gets into the low pressure reverse osmosis membrane module through working shaft, security personnel's strainer and HPP successively; The dialysis water out of low pressure reverse osmosis membrane module connects the import of fresh water basin; The low pressure reverse osmosis system with HPP pumps into low pressure reverse osmosis membrane filtration system through security personnel behind the strainer with the elementary fresh water of capacitive adsorption deionizing system gained, through reverse osmosis membrane filtration separate dialysis water and condensed water, dialysis water gets into basin and gets fresh water; A condensed water part is separated through the reflux membrane filtration that circulates of condensed water topping-up pump, and a part refluxes and gets into the electrolytic purification system recycle, the redundance discharging;
Said low pressure reverse osmosis system also comprises the reverse osmosis concentration water reclamation system; The reverse osmosis concentration water reclamation system is used for system that the condensed water of reverse osmosis membrane filtration is recycled; The reverse osmosis concentration water reclamation system is provided with backflow condensed water topping-up pump, valve and stopping valve; The condensed water of low pressure reverse osmosis system exports one the tunnel and is back to low pressure reverse osmosis filtering membrane system through backflow condensed water topping-up pump, refluxes and connect the electrolytic purification system recycling in another road;
Said low pressure reverse osmosis system also comprises a reverse osmosis membrane cleaning and regeneration system; Reverse osmosis membrane cleaning and regeneration system is used to clean low pressure reverse osmosis filtering membrane system; Reverse osmosis membrane cleaning and regeneration system is provided with cleaning fluid tank, backwashing pump and stopping valve; The import of cleaning fluid tank connects low pressure reverse osmosis system dialysis water out through stopping valve, and a way outlet of cleaning fluid tank connects the outlet of reverse osmosis system condensed water, and another way outlet of cleaning fluid tank connects the working shaft outlet through backwashing pump.
The workflow of the utility model is: seawater → electrolytic purification system → capacitive adsorption deionizing system → low pressure reverse osmosis system → fresh water, fresh water meets GB5749-2006 " drinking water standard ".
Adopt this technological line to solve an existing desalination technology difficult problem, have following advantage:
1, the utility model adopts electrolytic method as the sea water desaltination pre-treatment; Have following outstanding effect: the strong oxidizing property material through electrolytic electric field and electrolysis generate is killed mikrobe such as bacterium, virus, algae and planktonic organism in the seawater; Eliminate the pollution of mikrobe, algae and planktonic organism to film; Organism in again can oxidizing water reduces the COD in the water.In addition; Under electrolytic electric field action; Destroy colloidal stability and other charged solia particle; Water body is taken off surely, finally impel mikrobe, bacterium, algae, the planktonic organism corpse of killing in the suspended solid that is present in the water, the water and be dissolved in colloid in the water to produce flocculation sediment and be removed, reach the target of rough purification.
2, short, the less investment of technical process: compare with used conventional reverse osmosis desalination process; Present technique has been simplified the pretreatment technology of seawater; When pre-treatment, without flocculation process, make the pretreatment technology process simplification, disposable facility investment reduces about more than 1/3rd.
4, environmental pollution is little: substitute flocculation with electrolysis and remove impurity, need not add chemical substance, not only reduced the consumption to chemical substance, and reduce the generation of mud, both reduced the pollution to environment, reduced cost again.
5, the reverse osmosis system material requirements low, cheap, solved DOMESTICATION PROBLEM: the conventional reverse osmosis method will be passed through multistage high pressure reverse osmosis desalination, produces just to meet GB5749-2006 " drinking water standard ", not only desalinates the flow process complicacy, invests also big.And the utility model is after pre-treatment; Elder generation's employing capacitive adsorption deionizing is that the seawater of 20000~35000 μ s/cm obtains the elementary fresh water that specific conductivity is 2000~5000 μ s/cm through desalting treatment with specific conductivity; Then as long as pass through the low pressure reverse osmosis desalination of one-level; Its fresh water just meets GB5749-2006 " drinking water standard "; Significantly reduced dependence, solved the problem of production domesticization, helped revitalizing national industry imported materials and items such as HPP, high pressure reverse osmosis membrane assembly and putaminas.
6, desalination efficient is high, energy consumption is low, production cost is low: the one, owing to do not add flocculation agent such as polymeric aluminum, the burden of reverse osmosis membrane is alleviated; The 2nd, elder generation's employing capacitive adsorption deionizing is that the seawater of 20000~35000 μ s/cm obtains the elementary fresh water that specific conductivity is 2000~5000 μ s/cm through desalting treatment with specific conductivity; Then as long as pass through the low pressure reverse osmosis desalination of one-level; Its fresh water just meets GB5749-2006 " drinking water standard ", makes the seawater utilization rate increase, and facility investment reduces; The energy that operational process consumes is also corresponding to descend, thereby significantly reduces production cost.
7, device integration is high, volume is little, simple to operate: the more used desalination process process simplification of the utility model technological line; And through rigorous perfect technological design, structural entity design and electric automatization design; To compare the dispersive unit originally and be integrated in one, and make compact equipment, the pipeline promulgation is more reasonable; Equipment volume is little, is convenient to little spatial operation.Control is automatically adopted in production control, and a key operation as long as start power supply, is just accomplished the integrated operation process, and is simple to operate.In addition, also be provided with fresh water automatic quality control system, when fresh water was off quality, system used auditory tone cues and reports to the police, and the latching operation.
Description of drawings
Fig. 1 is that the structure of the said a kind of sea water distiling plant embodiment of the utility model is formed synoptic diagram.
Embodiment
The utility model is the design of a kind of desalination process of completion after the comparative study of composition, character and the existing sea water desaltination scheme of seawater being goed deep into system; Through the combination utilization of technologies such as electrolytic purification system, capacitive adsorption deionizing system, low pressure reverse osmosis system, thereby form a kind of sea water distiling plant.
Following embodiment will combine accompanying drawing that the utility model is further described.
As shown in Figure 1, the said a kind of sea water distiling plant of the utility model is provided with:
Electrolytic purification system: electrolytic purification system is used for that seawater is carried out electrolytic cleaning and handles.Electrolytic purification system is provided with stopping valve 11, working shaft 12 electrolysis machines 13, setting tank 14, stopping valve 15, working shaft 16 and micro-filtration 17.The external seawater water storing tank of the import of stopping valve 11; The import of working shaft 12 connects the outlet of stopping valve 11; The outlet of working shaft 12 connects the import of electrolysis machine 13; The outlet of electrolysis machine 13 connects the import of setting tank 14, and the outlet of setting tank 14 connects the import of micro-filtration 17 successively through stopping valve 15, working shaft 16, and the outlet of micro-filtration 17 connects with the water-in of capacitive adsorption deionizing system.
The capacitive adsorption deionizing system: the capacitive adsorption deionizing system is used for electrolytic purification system is handled the purifying sea water of gained and further handles, and is 110V/m ~ 2 * 10 at volts DS 6Under the condition of V/m, realizing preliminary desalination, is that the sea water desalinization of 20000~35000 μ s/cm is 2000~5000 μ s/cm to specific conductivity with specific conductivity, obtains elementary fresh water.The capacitive adsorption deionizing system is provided with stopping valve 21, lift pump 22, stopping valve 23, security personnel's strainer 24, working shaft 25, capacitive adsorption deionizing apparatus 26, elementary fresh water basin 27 and condensed water topping-up pump 28.The import of stopping valve 21 connects the outlet of the electrolysis machine 13 of electrolytic purification system; Stopping valve 21 outlets connect the import of lift pump 22; The outlet of lift pump 22 connects the import of security personnel's strainer 24 through stopping valve 23; The outlet of security personnel's strainer 24 connects the import of working shaft 25, and the import of working shaft 25 connects the import of capacitive adsorption deionizing apparatus 26, and the dialysis water out of capacitive adsorption deionizing apparatus 26 connects the import of elementary fresh water basin 27; The outlet of elementary fresh water basin 27 connects with the import of low pressure reverse osmosis system, and condensed water recycles through condensed water topping-up pump 28 backflow entering electrolytic purification system;
The low pressure reverse osmosis system: the low pressure reverse osmosis system is used for the elementary fresh water of specific conductivity 2000~5000 μ s/cm of capacitive adsorption deionizing system handles gained is filtered, separates must dialyse water and condensed water.The low pressure reverse osmosis system is provided with stopping valve 31, working shaft 32, stopping valve 33, security personnel's strainer 34, HPP 35, low pressure reverse osmosis membrane module 36, stopping valve 37 and fresh water basin 38.The import of stopping valve 31 connects the outlet of the elementary fresh water basin 27 of capacitive adsorption deionizing system; The outlet of stopping valve 31 gets into low pressure reverse osmosis membrane module 36 through working shaft 32, stopping valve 33, security personnel's strainer 34 and HPP 35 successively, and the dialysis water out of low pressure reverse osmosis membrane module 36 connects the import of fresh water basin 38.
The reverse osmosis concentration water reclamation system: the reverse osmosis concentration water reclamation system is used for system that the condensed water of reverse osmosis membrane filtration is recycled.The reverse osmosis concentration water reclamation system is provided with backflow condensed water topping-up pump 41, valve 42, stopping valve 43 and valve 44.The import of backflow condensed water topping-up pump 41 connects the condensed water outlet of low pressure reverse osmosis filtering membrane system 36, and the outlet of backflow condensed water topping-up pump 41 connects the import of low pressure reverse osmosis filtering membrane system 36; Another road of condensed water outlet of low pressure reverse osmosis filtering membrane system 36 is back to electrolysis machine 13 recyclings through valve 42, stopping valve 43, valve 44.
Reverse osmosis membrane cleaning and regeneration system: reverse osmosis membrane cleaning and regeneration system is used to clean low pressure reverse osmosis filtering membrane system.Reverse osmosis membrane cleaning and regeneration system is provided with stopping valve 51, cleaning fluid tank 52, stopping valve 53, stopping valve 54, backwashing pump 55 and stopping valve 56.The import of cleaning fluid tank 52 connects low pressure reverse osmosis filtering membrane system 36 dialysis water outs through stopping valve 51; One way outlet of cleaning fluid tank 52 connects the 36 condensed water outlet of low pressure reverse osmosis filtering membrane system through stopping valve 53, valve 42, and another way outlet of cleaning fluid tank 52 connects working shaft 32 outlets through stopping valve 54, backwashing pump 55 and stopping valve 56 successively.
Below in conjunction with the specific embodiment that provides method for desalting seawater below Fig. 1.
Embodiment 1
The sea water desaltination engineering of 600 ton per days.
The water quality situation of said seawater is as shown in table 1.
The undressed seawater quality index of table 1
Sequence number Project Index Sequence number Project Index
1 Smelly and the flavor No odor smell 5 COD(mg/L) 10
2 pH 8.0 6 Ammonia nitrogen (mg/L) 0.3
3 SS (mg/L) 16 7 Algae (individual/L) 1.9×10 2
4 Opacity/NTU 4.0 8 Total plate count (individual/L) 5.4×10 3
Step 1, electrolysis: the starting working shaft 12, with seawater with 30m 3The flow velocity of/h is killed the mikrobes such as planktonic organism, bacterium and virus in the seawater through carrying out electrolysis in the stopping valve 11 warp input electrolysis machines 13, again through deposition and micro-filtration, removes mikrobe corpse, suspended substance and colloidalmaterial, gets purifying sea water.Said electrolysis is the nano-catalytic electrolysis, and two interpolar voltages are 3~5V, and current density is 10 ~ 260mA/cm 2The electrocatalysis of the coating through being covered in the anode top layer reduces electrolytic overpotential, thereby makes seawater, electrolysis under lower voltage conditions; The chlorine [Cl] of the status nascendi that electrolysis produces can be killed mikrobe, algae and planktonic organism in the water; Eliminate the pollution to film of mikrobe, algae and planktonic organism, the organism in again can oxidizing water reduces the COD in the water.In addition, under electrolytic electric field action, water body is taken off surely, impel mikrobe, bacterium, algae, the planktonic organism corpse of killing in the suspended solid that is present in the water, the water and the colloid that is dissolved in the water produces flocculation sediment.
Step 2, capacitive adsorption deionizing: the purifying sea water of handling gained through electrolytic purification system gets into capacitive adsorption deionizing apparatus 26 through stopping valve 21, lift pump 22, stopping valve 23, security personnel's strainer 24, working shaft 25 successively; In strength of electric field is under the effect of 110V/m; Realize purification of water quality; Dialysis water is stored in the elementary fresh water basin 27 and obtains elementary fresh water, and condensed water then recycles through condensed water topping-up pump 28 backflow entering electrolytic purification system.
The ratio of desalinization of described capacitive adsorption deionizing system reaches 83%.
Step 3, low pressure reverse osmosis desalination: the elementary fresh water of capacitive adsorption deionizing system gained gets into filtering separation in the low pressure reverse osmosis membrane filtration system 36 through stopping valve 31, working shaft 32, stopping valve 33, security personnel's strainer 34 and HPP 35 successively; Dialysis water is stored in the fresh water basin 38 through stopping valve 37; Obtain fresh water; A condensed water part is separated through the reflux membrane filtration that circulates of condensed water topping-up pump 41; A part is back to the electrolytic purification system recycle through valve 42, stopping valve 43, valve 44 successively, the redundance discharging.
The membrane module of said low pressure reverse osmosis system is for to the sodium-chlor rejection being 98% r-o-rolled membrane module, and mould material is the aromatic polyamides composite package, and working conditions is: 25~45 ℃, working pressure is 1.0MPa.
Table 2 fresh water water-quality guideline
Sequence number Project Index Sequence number Project Index
1 Smelly and the flavor No odor smell 5 COD(mg/L)≤ 1
2 pH 8.0 6 Ammonia nitrogen (mg/L)<= Do not detect
3 SS (mg/L)≤ 1 7 Algae (individual/L) Do not detect
4 Opacity/NTU<= 1 8 Total plate count (individual/L)<= 1
Embodiment 2
The sea water desaltination engineering of 1500 ton per days.
The water quality situation of said seawater is as shown in table 3.
The undressed seawater quality index of table 3
Sequence number Project Index Sequence number Project Index
1 Smelly and the flavor No odor smell 5 COD(mg/L) 8
2 pH 8.1 6 Ammonia nitrogen (mg/L) 0.5
3 SS (mg/L) 20 7 Algae (individual/L) 1.1×10 2
4 Opacity/NTU 3.5 8 Total plate count (individual/L) 3.6×10 3
Step 1, electrolysis: the starting working shaft 12, with seawater with 75m 3The flow velocity of/h is killed the mikrobes such as planktonic organism, bacterium and virus in the seawater through carrying out electrolysis in the stopping valve 11 warp input electrolysis machines 13, again through deposition and micro-filtration, removes mikrobe corpse, suspended substance and colloidalmaterial, gets purifying sea water.Said electrolysis is the nano-catalytic electrolysis, and two interpolar voltages are 2~15V, and current density is 10 ~ 260mA/cm 2The electrocatalysis of the coating through being covered in the anode top layer reduces electrolytic overpotential, thereby makes seawater, electrolysis under lower voltage conditions; The chlorine [Cl] of the status nascendi that electrolysis produces can be killed mikrobe, algae and planktonic organism in the water; Eliminate the pollution to film of mikrobe, algae and planktonic organism, the organism in again can oxidizing water reduces the COD in the water.In addition, under electrolytic electric field action, water body is taken off surely, impel mikrobe, bacterium, algae, the planktonic organism corpse of killing in the suspended solid that is present in the water, the water and the colloid that is dissolved in the water produces flocculation sediment.
Step 2, capacitive adsorption deionizing: the purifying sea water of handling gained through electrolytic purification system gets into capacitive adsorption deionizing apparatus 26 through stopping valve 21, lift pump 22, stopping valve 23, security personnel's strainer 24, working shaft 25 successively, is 1 * 10 in strength of electric field 6Under the effect of V/m, realize purification of water quality, dialysis water is stored in the elementary fresh water basin 27 and obtains elementary fresh water, and condensed water then recycles through condensed water topping-up pump 28 backflow entering electrolytic purification system.
The ratio of desalinization of described capacitive adsorption deionizing system reaches 87%.
Step 3, low pressure reverse osmosis desalination: the elementary fresh water of capacitive adsorption deionizing system gained gets into filtering separation in the low pressure reverse osmosis membrane filtration system 36 through stopping valve 31, working shaft 32, stopping valve 33, security personnel's strainer 34 and HPP 35 successively; Dialysis water is stored in the fresh water basin 38 through stopping valve 37; Obtain fresh water; A condensed water part is separated through the reflux membrane filtration that circulates of condensed water topping-up pump 41; A part is back to the electrolytic purification system recycle through valve 42, stopping valve 43, valve 44 successively, the redundance discharging.
The membrane module of said low pressure reverse osmosis system is for to the sodium-chlor rejection being 98% r-o-rolled membrane module, and mould material is the aromatic polyamides composite package, and working conditions is: 25~45 ℃, working pressure is 2.0MPa.
Table 4 fresh water water-quality guideline
Sequence number Project Index Sequence number Project Index
1 Smelly and the flavor No odor smell 5 COD(mg/L)≤ 1
2 pH 8.1 6 Ammonia nitrogen (mg/L)<= Do not detect
3 SS (mg/L)≤ 1 7 Algae (individual/L) Do not detect
4 Opacity/NTU<= 1 8 Total plate count (individual/L)<= 1
Embodiment 3
The sea water desaltination engineering of 4000 ton per days.
The water quality situation of said seawater is as shown in table 5.
The undressed seawater quality index of table 5
Sequence number Project Index Sequence number Project Index
1 Smelly and the flavor No odor smell 5 COD(mg/L) 14
2 pH 8.0 6 Ammonia nitrogen (mg/L) 0.9
3 SS (mg/L) 19 7 Algae (individual/L) 2.3×10 2
4 Opacity/NTU 4.7 8 Total plate count (individual/L) 8.5×10 3
Step 1, electrolysis: the starting working shaft 12, with seawater with 200m 3The flow velocity of/h is killed the mikrobes such as planktonic organism, bacterium and virus in the seawater through carrying out electrolysis in the stopping valve 11 warp input electrolysis machines 13, again through deposition and micro-filtration, removes mikrobe corpse, suspended substance and colloidalmaterial, gets purifying sea water.Said electrolysis two interpolar voltages are 2~18V, and current density is 10 ~ 300mA/cm 2Strong oxidizing property material through electrolysis produces is killed mikrobe, algae and planktonic organism in the water, eliminates the pollution to film of mikrobe, algae and planktonic organism, and the organism in again can oxidizing water reduces the COD in the water.In addition, under electrolytic electric field action, water body is taken off surely, impel mikrobe, bacterium, algae, the planktonic organism corpse of killing in the suspended solid that is present in the water, the water and the colloid that is dissolved in the water produces flocculation sediment.
Step 2, capacitive adsorption deionizing: the purifying sea water of handling gained through electrolytic purification system gets into capacitive adsorption deionizing apparatus 26 through stopping valve 21, lift pump 22, stopping valve 23, security personnel's strainer 24, working shaft 25 successively, is 2 * 10 in strength of electric field 6Under the effect of V/m, realize purification of water quality, dialysis water is stored in the elementary fresh water basin 27 and obtains elementary fresh water, and condensed water then recycles through condensed water topping-up pump 28 backflow entering electrolytic purification system.
The ratio of desalinization of described capacitive adsorption deionizing system reaches 90%.
Step 3, low pressure reverse osmosis desalination: the elementary fresh water of capacitive adsorption deionizing system gained gets into filtering separation in the low pressure reverse osmosis membrane filtration system 36 through stopping valve 31, working shaft 32, stopping valve 33, security personnel's strainer 34 and HPP 35 successively; Dialysis water is stored in the fresh water basin 38 through stopping valve 37; Obtain fresh water; A condensed water part is separated through the reflux membrane filtration that circulates of condensed water topping-up pump 41; A part is back to the electrolytic purification system recycle through valve 42, stopping valve 43, valve 44 successively, the redundance discharging.
The membrane module of said low pressure reverse osmosis system is for to the sodium-chlor rejection being 98% r-o-rolled membrane module, and mould material is the aromatic polyamides composite package, and working conditions is: 25~45 ℃, working pressure is 3.5 MPa.
Table 6 fresh water water-quality guideline
Sequence number Project Index Sequence number Project Index
1 Smelly and the flavor No odor smell 5 COD(mg/L)≤ 1
2 pH 8.0 6 Ammonia nitrogen (mg/L)<= Do not detect
3 SS (mg/L)≤ 1 7 Algae (individual/L) Do not detect
4 Opacity/NTU<= 1 8 Total plate count (individual/L)<= 1

Claims (4)

1. a sea water distiling plant is characterized in that being provided with electrolytic purification system, capacitive adsorption deionizing system and low pressure reverse osmosis system;
Said electrolytic purification system is provided with stopping valve, working shaft, electrolysis machine, setting tank and micro-filtration; The external seawater water storing tank of the import of stopping valve; The import of working shaft connects the outlet of stopping valve; The water supply pump outlet connects the import of electrolysis machine; The outlet of electrolysis machine connects the import of setting tank, and the outlet of setting tank connects the import of micro-filtration, and the outlet of micro-filtration connects with the water-in of capacitive adsorption deionizing system; Said electrolysis machine is provided with power supply and electrolyzer;
Said capacitive adsorption deionizing system is provided with stopping valve, lift pump, security personnel's strainer, working shaft, capacitive adsorption deionizing apparatus, elementary fresh water basin and condensed water topping-up pump; The import of said stopping valve connects the outlet of the micro-filtration membrane module of electrolytic purification system; The stopping valve outlet connects the import of lift pump; Promote the import that pump outlet connects security personnel's strainer, the outlet of security personnel's strainer connects the import of working shaft, and the import of working shaft connects the import of capacitive adsorption deionizing apparatus; The dialysis water out of capacitive adsorption deionizing apparatus connects the import of elementary fresh water basin, and the outlet of elementary fresh water basin connects with the import of low pressure reverse osmosis system;
Said low pressure reverse osmosis system is provided with stopping valve, working shaft, security personnel's strainer, HPP, low pressure reverse osmosis membrane module and fresh water basin; The import of stopping valve connects the outlet of the elementary fresh water basin of capacitive adsorption deionizing system; Through working shaft, security personnel's strainer, HPP, entering low pressure reverse osmosis membrane module, the dialysis water out of low pressure reverse osmosis membrane module connects the import of fresh water basin successively in the outlet of stopping valve;
Said low pressure reverse osmosis system also comprises the reverse osmosis concentration water reclamation system; The reverse osmosis concentration water reclamation system is provided with backflow condensed water topping-up pump, valve and stopping valve; The condensed water of low pressure reverse osmosis system exports one the tunnel and is back to low pressure reverse osmosis filtering membrane system through backflow condensed water topping-up pump, refluxes and connect electrolytic purification system in another road;
Said low pressure reverse osmosis system also comprises a reverse osmosis membrane cleaning and regeneration system; Reverse osmosis membrane cleaning and regeneration system is provided with cleaning fluid tank, backwashing pump and stopping valve; The import of cleaning fluid tank connects low pressure reverse osmosis system dialysis water out through stopping valve; One way outlet of cleaning fluid tank connects the outlet of reverse osmosis system condensed water, and another way outlet of cleaning fluid tank connects the working shaft outlet through backwashing pump.
2. a kind of sea water distiling plant as claimed in claim 1 is characterized in that electrode in the said electrolyzer is a kind of in alloy and the nano-catalytic noble electrode of Graphite Electrodes, titanium electrode, the ferroelectric utmost point, aluminium electrode, zinc electrode, copper electrode, lead electrode, nickel electrode, molybdenum electrode, chromium electrode, metal; The top layer of said nano-catalytic noble electrode is coated with the MOX inertia catalyst coatings that crystal grain is 10~35nm; The substrate of said nano-catalytic noble electrode is titanium plate or plastic plate.
3. a kind of sea water distiling plant as claimed in claim 1, it is the titanium-base anode of the coating of metal oxides of 10~35nm that the anode that it is characterized in that said capacitive adsorption deionizing apparatus adopts surface coverage that crystal grain is arranged; Said anode is tabular anode, circular-arc anode, cylindric anode or meshed anode.
4. like claim 1 or 3 described a kind of sea water distiling plants; The negative electrode that it is characterized in that said capacitive adsorption deionizing apparatus is titanium negative electrode, iron cathode, aluminium negative electrode, stainless steel cathode, zinc negative electrode, cathode, nickel cathode, lead electrode or graphite cathode, and said negative electrode is circular-arc negative electrode, cylindric negative electrode or mesh cathode.
CN201220123365XU 2012-03-29 2012-03-29 Seawater desalination device Expired - Fee Related CN202465430U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013143505A1 (en) * 2012-03-29 2013-10-03 波鹰(厦门)科技有限公司 Seawater desalination device and method
CN107746097A (en) * 2017-09-29 2018-03-02 江苏科技大学 A kind of reverse osmosis membrane and capacitance method desalinization combined system
CN110316884A (en) * 2019-07-02 2019-10-11 江苏科技大学 SWRO with energy regenerating and MCDI coupling seawater desalination plant system
CN113493239A (en) * 2021-08-23 2021-10-12 中国科学院生态环境研究中心 Electrochemical treatment device, seawater desalination system and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013143505A1 (en) * 2012-03-29 2013-10-03 波鹰(厦门)科技有限公司 Seawater desalination device and method
CN107746097A (en) * 2017-09-29 2018-03-02 江苏科技大学 A kind of reverse osmosis membrane and capacitance method desalinization combined system
CN110316884A (en) * 2019-07-02 2019-10-11 江苏科技大学 SWRO with energy regenerating and MCDI coupling seawater desalination plant system
CN110316884B (en) * 2019-07-02 2021-06-01 江苏科技大学 SWRO and MCDI coupling seawater desalination device system with energy recovery function
CN113493239A (en) * 2021-08-23 2021-10-12 中国科学院生态环境研究中心 Electrochemical treatment device, seawater desalination system and method

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