CN109534568A - Integrated seawater resources utilization system - Google Patents
Integrated seawater resources utilization system Download PDFInfo
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- CN109534568A CN109534568A CN201710872519.2A CN201710872519A CN109534568A CN 109534568 A CN109534568 A CN 109534568A CN 201710872519 A CN201710872519 A CN 201710872519A CN 109534568 A CN109534568 A CN 109534568A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/09—Bromine; Hydrogen bromide
- C01B7/096—Bromine
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/06—Preparation by working up brines; seawater or spent lyes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/26—Magnesium halides
- C01F5/30—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/40—Magnesium sulfates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/4604—Treatment of water, waste water, or sewage by electrochemical methods for desalination of seawater or brackish water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The application discloses a kind of integrated seawater resources utilization system, including pretreatment system, the first counter-infiltration system, mechanical compression evaporation concentration system and salt manufacturing and salt chemical engineering system, pretreatment system is for pre-processing seawater, and be connected to the first counter-infiltration system, the first counter-infiltration system is used to implement reverse osmosis treatment to by pretreated seawater to obtain desalination water and strong brine；First counter-infiltration system has desalination water output and strong brine delivery outlet, and desalination water output is connected with the first desalination waterpipe, and the first desalination waterpipe passes through pretreatment system, and can be with the seawater to make heat exchange in pretreatment system；Mechanical compression evaporation concentration system is connect with strong brine delivery outlet, and for strong brine to be concentrated, salt manufacturing and salt chemical engineering system are used to prepare refined salt and salt chemical product using the strong brine after concentration.Above scheme, which can solve the strong brine that current sea water desalination has that resource utilization is low and sea water desalination is discharged, will affect marine ecology.
Description
Technical field
This application involves seawater treatment technologies field more particularly to a kind of integrated seawater resources utilization systems.
Background technique
Currently, shortage of water resources problem is increasingly prominent, one of some countries and regions socio-economic developments is become
Restraining factors.As the open source increment technique of freshwater resources, sea water desalination has become the weight for solving global freshwater resources crisis
Want approach.It follows that desalination technology has obtained significant progress.
Multi-stage flash evaporation technology, low temperature multiple-effect distillation technology and reverse osmosis technology are three big mainstream skills of current sea water desalination
Art, wherein reverse osmosis technology is due to having many advantages, such as that energy consumption is low, construction period is short, it has also become widely used one
Kind desalination technology.The higher strong brine of concentration can be generated using the process that reverse osmosis technology desalinates seawater, these
Twice of the salinity of the salinity of strong brine even natural sea-water.It will be apparent that the strong brine discharge that sea water desalination generates will lead to
The salinity of seawater increases, and in such cases, the seawater salinity in local sea area is excessively high to generate fatal harm to biology in ocean.
It will be apparent that current sea water desalination work can have adverse effect on ecological environment.While greatly developing sea water desalination,
Protecting marine ecology and carrying out the comprehensive utilization of seawater resources is the key that current development sea water desalination industry.But current seawater
Desalinate work and not up to above-mentioned requirements.
Summary of the invention
The application provides a kind of integrated seawater resources utilization system, and to solve current sea water desalination, there are resource benefits
The problem of will affect marine ecology with the strong brine that rate is low and sea water desalination is discharged.
To solve the above-mentioned problems, the application adopts the following technical solutions:
Integrated seawater resources utilization system, including the evaporation of pretreatment system, the first counter-infiltration system, mechanical compression
Concentration systems and salt manufacturing and salt chemical engineering system, wherein for the pretreatment system for pre-processing to seawater, described first is anti-
Osmosis system is connected with the pretreatment system, and first counter-infiltration system is used for anti-to implementing by pretreated seawater
Infiltration processing is to obtain desalination water and strong brine；First counter-infiltration system has desalination water output and strong brine output
Mouthful, the desalination water output is connected with the first desalination waterpipe, and the first desalination waterpipe passes through the pretreatment system,
And it can be with the seawater to make heat exchange in the pretreatment system；The mechanical compression evaporation concentration system and the salt manufacturing and salt chemical engineering system
System connection, the mechanical compression evaporation concentration system is connect with the strong brine delivery outlet, for strong brine to be concentrated；Institute
It states salt manufacturing and salt chemical engineering system is used to prepare refined salt and salt chemical product using the strong brine after concentration.
Preferably, in above system, the pretreatment system includes coagulative precipitation device, heat exchanger and ultrafiltration apparatus；Its
In, the coagulative precipitation device is used to carry out coagulating sedimentation to seawater, and the heat exchanger and the ultrafiltration apparatus are connected in turn
The outlet of the coagulative precipitation device；The heat exchanger is for realizing the desalination water in the first desalination waterpipe and through overmulling
The seawater to make heat exchange that retrogradation is formed sediment；The ultrafiltration apparatus is used to implement hyperfiltration treatment to the seawater after heat exchange.
Preferably, in above system, the pretreatment system further includes ultrafiltration cold water tank and ultrafiltration hot-water cylinder, the ultrafiltration
Cold water tank and the ultrafiltration hot-water cylinder are connected in turn between the heat exchanger and the ultrafiltration apparatus, the ultrafiltration cold water tank with
Secondary steam caused by water pipeline and the salt manufacturing and salt chemical engineering system between the ultrafiltration hot-water cylinder exchanges heat.
Preferably, in above system, the integration seawater resources utilization system further includes deionized water system, institute
It states deionized water system and is connect with the desalination water output by the second desalination waterpipe, the second desalination waterpipe and institute
It is in parallel to state the first desalination waterpipe；The deionized water system is used to carry out the desalination water of the second desalination waterpipe discharge
Deionization processing is to obtain deionized water.
Preferably, in above system, the deionized water system includes the second counter-infiltration system and continuous electric desalination system,
Wherein, second counter-infiltration system and continuous electric desalination the system successively cloth in the water (flow) direction of the second desalination waterpipe
It sets.
Preferably, in above system, the salt manufacturing and salt chemical engineering system include the mechanical compression evaporation salt manufacturing being sequentially connected
System, multiple-effect evaporation potassium chloride system, bromine system and evaporation magnesium chloride system；The mechanical compression evaporates salt making system
It is connected with the mechanical compression evaporation concentration system, and for producing purified salt and calcium sulfate；The multiple-effect evaporation potassium chloride
System is for producing potassium chloride and magnesium sulfate；The bromine system is used for for producing bromine, the evaporation magnesium chloride system processed
Produce magnesium chloride；
Mechanical compression evaporation salt making system, the multiple-effect evaporation potassium chloride system, the bromine system and described
The secondary steam for evaporating magnesium chloride system processed respectively enters respective heat exchanger, and with it is pretreated through the pretreatment system
Seawater to make heat exchange, the condensed water after heat exchange import the condensing water conduit of the salt manufacturing Yu salt chemical engineering system；
Mechanical compression evaporation salt making system, the multiple-effect evaporation potassium chloride system, the bromine system and described
The condensation-water drain for evaporating magnesium chloride system processed is connected to the condensing water conduit of the salt manufacturing and salt chemical engineering system.
Preferably, in above system, the condensing water conduit of the salt manufacturing and salt chemical engineering system is steamed across the mechanical compression
Concentration systems are sent out to exchange heat, the condensing water conduit is connected to second counter-infiltration system, is used for the condensed water
Input the deionized water system.
Preferably, in above system, mechanical compression evaporation salt making system include heat-exchanger rig, evaporator, flash vessel,
Centrifuge, settler, compressor, pump and aeration tower；Wherein, the heat-exchanger rig with the strong brine Jing Guo concentration for changing
Heat；The evaporator is connected to the mechanical compression evaporation concentration system, for receiving after exchanging heat with the heat-exchanger rig
The strong brine；The evaporator is for being evaporated with precipitated sodium chloride crystal the strong brine；The centrifuge is logical
It crosses the pump to be connected with the evaporator, to receive the sodium chloride salt slurry that the evaporator generates, and sodium chloride salt slurry be carried out
Centrifugal dehydration obtains purification product salt；
The settler is connected with the evaporator, for receiving the brine containing calcium sulfate of the evaporator discharge,
And calcium sulfate is isolated, and obtain clarified solution；The flash tank is connected with the settler, for analysing from the clarified solution
Sodium chloride crystal out；The flash tank is connected with the centrifuge, and the centrifuge is for separating preparation purification product salt.
The application use at least one above-mentioned technical solution can reach it is following the utility model has the advantages that
Integration seawater resources utilization system disclosed in the present application at work, locate in advance by pretreatment system by seawater
It is entered after reason in the first counter-infiltration system, the first counter-infiltration system implements reverse osmosis treatment to seawater, obtains strong brine and light
Change water, desalination water can by the first desalination water pipeline to user, the desalination coolant-temperature gage that obtains by reverse osmosis treatment compared with
Height, first desalination waterpipe with pass through pretreatment system, and with after the seawater to make heat exchange in pretreatment system, by heat exchange after, in advance
Ocean temperature in processing system increases, and then can improve pretreating effect, while realizing making full use of for desalination water energy.System
Salt and salt chemical engineering system can carry out preparing refined salt and salinization using the strong brine after the concentration of mechanical compression evaporation concentration system
Chemical product.As it can be seen that disclosed system is able to achieve sea water desalination, at the same can also make full use of the by-product of sea water desalination into
The preparation of row refined salt and salt chemical product, entire treatment process can be realized the comprehensive utilization of seawater, reached and make full use of
The purpose of seawater resources, and basically reach zero-emission.Therefore, integrated seawater resources comprehensive utilization system disclosed in the present application
System, can solve current sea water desalination, to will affect ocean raw there are the strong brine that resource utilization is lower and sea water desalination is discharged
The problem of state.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of integration seawater resources utilization system disclosed in the embodiment of the present application；
Fig. 2 is the structural schematic diagram of pretreatment system disclosed in the embodiment of the present application.
The reference numerals are as follows:
10- pretreatment system, 11- coagulative precipitation device, 12- heat exchanger, 13- ultrafiltration apparatus, 14- ultrafiltration cold water tank, 15-
Ultrafiltration hot-water cylinder, the first counter-infiltration system of 20-, 21- first desalinate waterpipe, 22- second desalinates waterpipe, 30- mechanical compression
Evaporation concentration system, 40- salt manufacturing and salt chemical engineering system, 41- mechanical compression evaporate salt making system, 42- multiple-effect evaporation potassium chloride
System, 43- bromine system, 44- evaporate magnesium chloride system processed, 45- pipeline, 46- condensing water conduit, 50- deionized water system,
The second counter-infiltration system of 51-, 52- continuous electric desalination system.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.
Below in conjunction with attached drawing, the technical scheme provided by various embodiments of the present application will be described in detail.
Referring to FIG. 1, the embodiment of the present application discloses a kind of integrated seawater resources utilization system, disclosed system
Including pretreatment system 10, the first counter-infiltration system 20 and mechanical compression evaporation concentration system 30 and salt manufacturing and salt chemical engineering system
40。
Pretreatment system 10 is for pre-processing seawater, so that seawater can satisfy the processing requirement of system.Pre- place
Reason includes the filter operation to seawater, to reduce the impurity in seawater.In a kind of specific embodiment, pretreatment system 10 can
To include coagulation and filtration system, ultrafiltration membrane system, backwashing system, medicine system, air supply system, chemical cleaning system and automatic control system
System.In general, through precipitating removal colloid, suspended matter etc. after coagulant is added during pretreatment operation into seawater.
First counter-infiltration system 20 is connected with pretreatment system 10, and the first counter-infiltration system 20 is used for by pretreated
Seawater implements reverse osmosis treatment, and then obtains desalination water and strong brine.In the embodiment of the present application, the first counter-infiltration system 20 can be with
For level-one two-part counter-infiltration system, the water rate of recovery is up to 65%.In a kind of specific embodiment, the first counter-infiltration system
20 may include cartridge filter, high-pressure pump, first-stage reverse osmosis membrane module, energy recycle device, medicine system, flushing cleaning system
System, blind controller system etc..
In the application, the first counter-infiltration system 20 has desalination water output and strong brine delivery outlet.Desalinate water output
Be connected with the first desalination waterpipe 21, the first desalination waterpipe 21 passes through pretreatment system 10, and can in pretreatment system 10
Seawater to make heat exchange.
Mechanical compression evaporation concentration system 30 is connect with strong brine delivery outlet, for strong brine to be concentrated.Salt manufacturing and
Salt chemical engineering system 40 is connect with mechanical compression evaporation concentration system 30, for preparing refined salt and salinization using the strong brine after concentration
Chemical product.
At work, seawater is by pretreatment system for integration seawater resources utilization system disclosed in the embodiment of the present application
It is entered in the first counter-infiltration system 20 after 10 pretreatment of system, the first counter-infiltration system 20 implements reverse osmosis treatment to seawater, obtains
To strong brine and desalination water, desalination water can be conveyed to user by the first desalination waterpipe 21, obtain by reverse osmosis treatment
Desalination coolant-temperature gage it is higher, first desalination waterpipe 21 can pass through pretreatment system 10, and with the sea in pretreatment system 10
After water heat exchange, after heat exchange, the ocean temperature in pretreatment system 10 is increased, and then improves ultrafiltration and subsequent counter-infiltration system
Operational efficiency, while realizing making full use of for desalination water energy.Salt manufacturing and salt chemical engineering system 40 can be utilized through mechanical compression
Strong brine after evaporation concentration system 30 is concentrated carries out preparing refined salt and salt chemical product.As it can be seen that disclosed in the embodiment of the present application
System is able to achieve sea water desalination, while can also make full use of the by-product progress refined salt of sea water desalination and the system of salt chemical product
Standby, entire treatment process can be realized the comprehensive utilization of seawater, achieve the purpose that make full use of seawater resources, and basic
Reach zero-emission.Therefore, integration seawater resources utilization system disclosed in the embodiment of the present application, can solve current seawater
The strong brine that desalination has that resource utilization is lower and sea water desalination is discharged will affect marine ecology.
As described above, pretreatment includes filter operation, and correspondingly, pretreatment system 10 includes filter device, filtering dress
Set to be the various common filters for being suitable for sea water filter.Pretreatment can also include what other pairs of seawater were handled
Operation, such as coagulation operation, sterilizing operation etc..Referring to FIG. 2, the embodiment of the present application discloses a kind of pretreatment system of specific structure
System 10, pretreatment system 10 may include coagulative precipitation device 11, heat exchanger 12 and ultrafiltration apparatus 13.Coagulative precipitation device 11 is used
In carrying out coagulating sedimentation to seawater, heat exchanger 12 and ultrafiltration apparatus 13 are connected to the outlet of coagulative precipitation device 11 in turn.Heat exchange
For realizing the desalination water in the first desalination waterpipe 21 and by the seawater to make heat exchange of coagulating sedimentation, ultrafiltration apparatus 13 is used for device 12
Hyperfiltration treatment is implemented to the seawater after heat exchange.
Heat exchanger 12 can be by the thermal energy conduction of the desalination water in the first desalination waterpipe 21 to the sea of pretreatment system 10
It in water, and then can be improved the operational efficiency of ultrafiltration apparatus 13 and the first counter-infiltration system 20, reduce the energy consumption of whole system.One
In kind application scenarios, temperature is able to ascend 13 DEG C after the seawater to make heat exchange in pretreatment system 10.
Ultrafiltration apparatus 13 can prevent the inorganic or organic impurities greater than 0.01 μm by ultrafiltration membrane using physical method, can
For removing the suspended particulates in seawater, colloid, microorganism etc..Hydrone and small-molecule substance can be saturating in the presence of hydraulic pressure
Ultrafiltration membrane is crossed, suspended particulates, colloid, microorganism in seawater etc. are then trapped within the inner surface of ultrafiltration membrane.Ultrafiltration apparatus 13 has
Have and efficiently separate performance, the security performance of height, reliability, therefore is applied more and more widely in reverse osmosis pretreatment.It adopts
It uses ultrafiltration as reverse osmosis pretreatment, traditional multistage filtering technique can be acted on behalf of, and then reverse osmosis pollution pressure can be mitigated
Power.
In preferred scheme, pretreatment system 10 can also include ultrafiltration cold water tank 14 and ultrafiltration hot-water cylinder 15, and ultrafiltration is cold
Water pot 14 and ultrafiltration hot-water cylinder 15 are connected in turn between heat exchanger 12 and ultrafiltration apparatus 13, ultrafiltration cold water tank 14 and ultrafiltration hot water
Water pipeline between tank 15 can exchange heat with salt manufacturing and salt chemical engineering system 40.Salt manufacturing and salt making system 40 are in the process of work
Secondary steam can be generated, which further heats pre- place using the secondary steam that salt manufacturing and salt chemical engineering system 40 generate
Seawater in reason system 10, and then can be further improved the operational efficiency of pretreatment system 10 and the first counter-infiltration system 20, together
When also can be further improved making full use of for the energy.
Integration seawater resources utilization system disclosed in the embodiment of the present application can also include deionized water system 50,
Deionized water system 50 connect with desalination water output by the second desalination waterpipe 22, and second desalinates waterpipe 22 and first light
It is in parallel to change waterpipe 21.Deionized water system 50 is used to carry out at deionization the desalination water that the second desalination waterpipe 22 is discharged
Reason, and then obtain deionized water.As it can be seen that desalination water a part that the first counter-infiltration system 20 generates can pass through the first desalination water
After pipeline 21 and pretreatment system 10 are exchanged heat, it is delivered directly to user.Another part can pass through the second desalination waterpipe
22 obtain deionized water after the processing of deionized water system 50.
A kind of specific embodiment are as follows: deionized water system 50 may include that the second counter-infiltration system 51 and continuous electricity remove
Salt system 52, as shown in Figure 1.The water flow that second counter-infiltration system 51 and continuous electric desalination system 52 desalinate waterpipe 22 second
It is sequentially arranged on direction.In the application, the second counter-infiltration system 51 can use level-one three-stage counter-infiltration system, the water rate of recovery
Up to 95% or more.Example is largely removed in the desalination water handled by the second counter-infiltration system 51, and the water of generation reaches
The water inlet requirement of continuous electric desalination system 52.
Continuous electric desalination system 52 uses continuous electric desalination technology, and continuous electric desalination technology is a kind of by ion exchange skill
The pure water manufacturing technology that art, ion exchange membrane technology and ion electromigration techniques combine, it is cleverly by electrodialysis and ion
Switching technology combines, and keeps band ion in water mobile using two end electrodes high pressure, and cooperate exchanger resin and selective membrane to add
The mobile removal of fast ion, to achieve the purpose that water purifies.During continuous electric desalination, ion under electric field action by from
Proton exchange is removed.Meanwhile hydrone generates hydrogen ion and hydroxide ion under electric field action, these ion pair ions are handed over
It changes resin and carries out continuity regeneration, so that ion exchange resin keeps optimum state.The desalination rate of continuous electric desalination system 52 can
To be up to 99% or more, just one-step desalting is carried out to water using reverse osmosis equipment before the processing of continuous electric desalination system 52, then through even
Continuous 52 desalination of electrodeionization can produce resistivity up into the ultrapure water of 18M.cm or more.
Referring again to Fig. 1, in system disclosed in the embodiment of the present application, salt manufacturing and salt chemical engineering system 40 may include and machine
The sequentially connected mechanical compression of tool Compression Evaporation concentration systems 30 evaporate salt making system 41, multiple-effect evaporation potassium chloride system 42,
Bromine system 43 and evaporation magnesium chloride system 44.
Mechanical compression evaporation concentration system (i.e. MVR system) 30 is used to carry out Compression Evaporation processing to strong brine, using machine
Tool vapor recompression technique, it is therefore an objective to strong brine is further concentrated, in a kind of application scenarios, mechanical compression evaporation concentration system
The strong brine (being referred to as brine) of 8.9 ° of B é is concentrated into the strong brine of 25 ° of B é by 30, and then is supplied to mechanical compression evaporation
Salt making system 41.Mechanical compression evaporation concentration system 30 can use downward film evaporator, and be recycled by mechanical vapor-compression
Heat.Specifically, mechanical compression evaporation concentration system 30 may include heat-exchanger rig, degassing tower, compressor, circulating pump, waterpower
The equipment such as cyclone.Before being initiated, calcium sulfate crystal seed can be added to entering in MVR system in brine therein, the purpose is to
To ensure that environment is precipitated in a controllable calcium sulphate crystal, prevent crystal in scaling of heat transfer pipe.In the process of running, Ke Yili
It is controlled with hydrocyclone inside evaporator in a stable TSS level, guarantees that MVR system can transport steadily in the long term
Row.
Mechanical compression evaporation salt making system 41 is connected with mechanical compression evaporation concentration system 30, for producing calcium sulfate and essence
Salt manufacturing.Enter in mechanical compression evaporation salt making system 41 by the strong brine that mechanical compression evaporation concentration system 30 is handled, uses
Mechanical compression evaporation, crystallization processes prepare purified salt, obtain refined salt, isolate calcium sulfate, obtain the higher brine of concentration.It is a kind of
In application scenarios, the brine of 25 ° of B é that mechanical compression evaporation salt making system 41 produces mechanical compression evaporation concentration system 30 into
Row processing, obtains purified salt and calcium sulfate, and the strong brine (being properly termed as bittern) of 31.5 ° of B é of output is to be transported to multiple-effect evaporation
In potassium chloride system 42 processed.
It includes heat-exchanger rig, evaporator, flash tank, centrifuge, settler, centrifugation that mechanical compression, which evaporates salt making system 41,
Machine, compressor, pump and aeration tower.Heat-exchanger rig is used to exchange heat with the strong brine Jing Guo concentration, 25 ° after concentration
The brine (strong brine) of B é exchanges heat by heat-exchanger rig and time condensation water to boiling temperature, into evaporator.Evaporator with
Mechanical compression evaporation concentration system connection, for receiving the strong brine after exchanging heat with heat-exchanger rig；Evaporator is used for dense
Salt water is evaporated with precipitated sodium chloride crystal；Centrifuge is connected by pump with evaporator, to receive the chlorination of evaporator generation
Sodium salt slurry, and sodium chloride salt slurry is subjected to centrifugal dehydration, obtain purification product salt；Settler is connected with evaporator, for receiving
The brine containing calcium sulfate of evaporator discharge, and calcium sulfate is isolated, and obtain clarified solution；Flash tank and settler phase
Even, for the precipitated sodium chloride crystal from clarified solution；Flash tank is connected with the centrifuge, and centrifuge is for separating preparation purification
Product salt.
It flashes 31.5 ° of obtained B é bitterns and enters subsequent multiple-effect evaporation potassium chloride system.The steam generated from evaporator
Into the brine drop of gas washing tower apparatus removal entrainment, subsequently into compressor, the steam after compressor compresses enters
In evaporator.The secondary steam that evaporator generates recycles to evaporator after compressor compresses and provides heat, to can be reduced
Mechanical compression evaporates demand of the salt making system 41 to extra power.
Multiple-effect evaporation potassium chloride system 42 uses adding halogen method and triple effect evaporation technique preparing potassium chloride, while by-product sulfuric acid
Magnesium.The carnallite mother solution that high content of magnesium chloride is mixed in bittern is mixed than obtaining clear Mixed bittern by control, into three
Vaporising device is imitated, large quantity of moisture is evaporated under high-boiling state, sodium chloride is precipitated sufficiently with magnesium sulfate, through centrifugation apparatus
Isolated sodium chloride and magnesium sulfate.Carnallite (KClMgCl is further precipitated through cooling and crystallizing process for clarified solution2·6H2O),
Carnallite hydrolyzable obtains product potassium chloride.
Bromine system 43 is for producing bromine, specifically, bromine system 43 can be using air blowout alkaline process by bromine and dense
Thick halogen separation.Contain a certain amount of bromide ion in dense halogen, it can be by obtaining bromine simple substance after being acidified, aoxidizing.After acidification, oxidation
Dense halogen obtain certain density absorption rich in dissolubility bromide through stripping tower and complete liquid, enter destilling tower and acid reaction afterwards
Bromine simple substance is obtained, the preferable bromine simple substance of quality can finally obtained by condensation, separation, rectifying, it is dense after separating bromine simple substance
Halogen is delivered in evaporation magnesium chloride system 44 as mother liquid of magnesium processed by pump.
Magnesium chloride system 44 processed is evaporated for producing magnesium chloride, and the mother liquid of magnesium processed from bromine system 43 is unsaturated
MgCl2Solution.The disclosed evaporation magnesium chloride system 44 processed of the embodiment of the present application carries out magnesium chloride using single-action negative pressure evaporation technique
Preparation, evaporation complete after enter pelletizer prepare magnesium chloride product.
In the embodiment of the present application, mechanical compression evaporates salt making system 41, multiple-effect evaporation potassium chloride system 42, bromine system
43 and evaporation magnesium chloride system 44 be main salt chemical engineering equipment, mechanical compression evaporates salt making system 41, multiple-effect evaporation chlorine
Change potassium system 42, bromine system 43 and evaporation magnesium chloride system 44 due to working mechanism, two can be generated in the process of work
Secondary steam, these secondary steams respectively enter in the above-mentioned respective heat exchanger of each system, and with by pretreatment system 10
Seawater to make heat exchange, the condensed water after heat exchange import in the condensing water conduit 46 of salt manufacturing and salt chemical engineering system 40.Above-mentioned secondary steam
The heat exchange with the former seawater in pretreatment system 10 is realized under the guidance of pipeline 45.
Mechanical compression evaporates salt making system 41, multiple-effect evaporation potassium chloride system 42, bromine system 43 and evaporation chlorination
The condensation-water drain of magnesium system 44 is connected to the condensing water conduit 46 of salt manufacturing and salt chemical engineering system 40.
Pipeline 45 can pass through pretreatment system 10 and exchange heat with it, be connected to after heat exchange with condensing water conduit 46, condensate pipe
Road 46 exchanges heat with mechanical compression evaporation concentration system 30, and condensing water conduit 46 is connected to the second counter-infiltration system 51, is used for
Condensed water after heat exchange is input in deionized water system 50.Pipeline 45 passes through pretreatment system 10 and exchanges heat, Jin Erneng
The ocean temperature in pretreatment system 10 is improved, pretreating effect is improved.
The condensed water that pipeline 45 and pretreatment system 10 generate after exchanging heat can also be by condensing water conduit 46 and machinery pressure
Contracting evaporation concentration system 30 exchanges heat, and then the brine at the charging of heated mechanical Compression Evaporation concentration systems 30, Jin Erti
The efficiency of high mechanical compression evaporation concentration system 30, so that the heat of secondary steam and each system condensing water out in pipeline 45
Derived condensed water heat is fully used.Condensed water after above-mentioned heat exchange can enter in the second counter-infiltration system 51 to be used to
Prepare deionized water.The condensate pipe of mechanical compression evaporation concentration system 30 itself can also be connected with deionized water system 50,
The condensed water that mechanical compression evaporation concentration system 30 generates can also input in deionized water system 50.This can improve entire one again
Change the water rate of recovery of seawater resources utilization system.In the preferred embodiment, the desalination water source of deionized water system 50 can be with
For the part desalination water of the first counter-infiltration system 20, the condensed water of mechanical compression evaporation concentration system 30 and salt chemical engineering system
Pipeline 45 by heat exchange generate condensed water.
Integration seawater resources utilization system disclosed in the embodiment of the present application can be realized the zero-emission of sea water desalination,
It not only can solve influence problem of the sea water desalination to environment, but also there is quite high economic benefit.
Herein, only emphasis describes the difference with other preferred embodiments, each preferred embodiment to each preferred embodiment
As long as not conflicting, can any combination, embodiment is formed by after combination also within scope disclosed in this specification, is examined
It is succinct to consider text, is individually described with regard to being no longer formed by embodiment to combination herein.
The above description is only an example of the present application, is not intended to limit this application.For those skilled in the art
For, various changes and changes are possible in this application.All any modifications made within the spirit and principles of the present application are equal
Replacement, improvement etc., should be included within the scope of the claims of this application.
Claims (8)
1. integrated seawater resources utilization system, which is characterized in that including pretreatment system, the first counter-infiltration system, machine
Tool Compression Evaporation concentration systems and salt manufacturing and salt chemical engineering system, wherein the pretreatment system is used to pre-process seawater,
First counter-infiltration system is connected with the pretreatment system, and first counter-infiltration system is used for by pretreated
Seawater implements reverse osmosis treatment to obtain desalination water and strong brine；First counter-infiltration system has desalination water output and dense
Salt water output, the desalination water output are connected with the first desalination waterpipe, and the first desalination waterpipe passes through described pre-
Processing system, and can be with the seawater to make heat exchange in the pretreatment system；The mechanical compression evaporation concentration system and the salt manufacturing
It is connect with salt chemical engineering system, the mechanical compression evaporation concentration system is connect with the strong brine delivery outlet, for strong brine
It is concentrated；The salt manufacturing and salt chemical engineering system are used to prepare refined salt and salt chemical product using the strong brine after concentration.
2. system according to claim 1, which is characterized in that the pretreatment system includes coagulative precipitation device, heat exchange
Device and ultrafiltration apparatus；Wherein, the coagulative precipitation device is used to carry out coagulating sedimentation, the heat exchanger and the ultrafiltration to seawater
Device is connected to the outlet of the coagulative precipitation device in turn；The heat exchanger is for realizing in the first desalination waterpipe
Desalination water and the seawater to make heat exchange for passing through coagulating sedimentation；The ultrafiltration apparatus is used to implement at ultrafiltration the seawater after heat exchange
Reason.
3. system according to claim 2, which is characterized in that the pretreatment system further includes ultrafiltration cold water tank and ultrafiltration
Hot-water cylinder, the ultrafiltration cold water tank and the ultrafiltration hot-water cylinder are connected in turn between the heat exchanger and the ultrafiltration apparatus,
Two caused by water pipeline and the salt manufacturing and salt chemical engineering system between the ultrafiltration cold water tank and the ultrafiltration hot-water cylinder
Secondary steam heat-exchanging.
4. system according to claim 3, which is characterized in that it is described integration seawater resources utilization system further include
Deionized water system, the deionized water system and the desalination water output are connect by the second desalination waterpipe, and described the
Two desalination waterpipes are in parallel with the first desalination waterpipe；The deionized water system is used for the second desalination waterpipe
The desalination water of discharge carries out deionization and handles to obtain deionized water.
5. system according to claim 4, which is characterized in that the deionized water system include the second counter-infiltration system and
Continuous electric desalination system, wherein second counter-infiltration system and continuous electric desalination system are in the second desalination waterpipe
It is sequentially arranged in water (flow) direction.
6. system according to claim 5, which is characterized in that the salt manufacturing and salt chemical engineering system include the machine being sequentially connected
Tool Compression Evaporation salt making system, multiple-effect evaporation potassium chloride system, bromine system and evaporation magnesium chloride system；The machinery pressure
Contracting evaporation salt making system is connected with the mechanical compression evaporation concentration system, and for producing purified salt and calcium sulfate；It is described more
Effect evaporates potassium chloride system processed for producing potassium chloride and magnesium sulfate；The bromine system is for producing bromine, the evaporation system
Magnesium chloride system is for producing magnesium chloride；
The mechanical compression evaporation salt making system, the multiple-effect evaporation potassium chloride system, the bromine system and the evaporation
The secondary steam of magnesium chloride system processed respectively enters respective heat exchanger, and with through the pretreated seawater of the pretreatment system
Heat exchange, the condensed water after heat exchange import the condensing water conduit of the salt manufacturing Yu salt chemical engineering system；
The mechanical compression evaporation salt making system, the multiple-effect evaporation potassium chloride system, the bromine system and the evaporation
The condensation-water drain of magnesium chloride system processed is connected to the condensing water conduit of the salt manufacturing and salt chemical engineering system.
7. system according to claim 6, which is characterized in that the salt manufacturing and the condensing water conduit of salt chemical engineering system pass through
To exchange heat, the condensing water conduit is connected to the mechanical compression evaporation concentration system with second counter-infiltration system, is used
In the condensed water is inputted the deionized water system.
8. system according to claim 6, which is characterized in that the mechanical compression evaporation salt making system includes heat exchange dress
It sets, evaporator, flash vessel, centrifuge, settler, compressor, pump and aeration tower；Wherein, the heat-exchanger rig is used for and process
The strong brine of concentration exchanges heat；The evaporator is connected to the mechanical compression evaporation concentration system, for receive by with
The strong brine after the heat-exchanger rig heat exchange；The evaporator is for being evaporated with precipitated sodium chloride the strong brine
Crystal；The centrifuge is connected by the pump with the evaporator, to receive the sodium chloride salt slurry that the evaporator generates, and
Sodium chloride salt slurry is subjected to centrifugal dehydration, obtains purification product salt；
The settler is connected with the evaporator, for receiving the brine containing calcium sulfate of the evaporator discharge, and divides
Calcium sulfate is separated out, and obtains clarified solution；The flash tank is connected with the settler, for chlorine to be precipitated from the clarified solution
Change sodium crystal；The flash tank is connected with the centrifuge, and the centrifuge is for separating preparation purification product salt.
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