CN104310687B - Efficient MVR integrated seawater desalination device and seawater desalination method - Google Patents
Efficient MVR integrated seawater desalination device and seawater desalination method Download PDFInfo
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- CN104310687B CN104310687B CN201410546383.2A CN201410546383A CN104310687B CN 104310687 B CN104310687 B CN 104310687B CN 201410546383 A CN201410546383 A CN 201410546383A CN 104310687 B CN104310687 B CN 104310687B
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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
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention relates to a high-efficiency MVR integrated seawater desalination device and a method, wherein the desalination device comprises a main cabinet, a pretreatment module, a heating and waste heat recovery module, a mechanical vapor recompression module and a PLC control cabinet which are arranged in the main cabinet, an evaporation module arranged outside the main cabinet and a connecting pipeline; the pretreatment module comprises a self-backwashing filter, a dosing device and a three-way control valve; the heating and waste heat recovery module comprises a condensed fresh water heat exchanger, a strong brine heat exchanger, a degassing device and a fresh water tank, and the connecting pipeline comprises a seawater pipeline, a condensed fresh water production pipe, a strong brine discharge pipe and a strong brine circulating pipe; each module is connected with and controlled by the PLC switch board. The device and the method have the advantages of compact equipment, small volume, high assembly precision, convenient field installation and disassembly, low energy consumption and simple operation, can process according to modules, can perform maintenance according to functional blocks, and can realize large-scale application and popularization.
Description
Technical field
The present invention relates to a kind of device and method utilizing mechanical vapor recompression technology to carry out desalinization.
Background technology
China is populous, and freshwater resources are increasingly in short supply, and the scarcity solving freshwater resources is had great importance by development desalination technology.Desalination technology based on method of evaporating has the advantages such as the product water water quality, cost that the method such as UF membrane, ion exchange do not has.But traditional single-action and multiple-effect evaporation technology need to provide a large amount of raw steam, and need to configure coal-burning boiler and cooling system, can cause the energy resource consumption being difficult to avoid that and produce substantial amounts of waste discharge.Causing overall system architecture complicated, bulky, operation and maintenance difficulty, operating cost steeply rises simultaneously.
Function of mechanical steam recompression is a kind of evaporation technology, is called for short MVR (Mechanical
Vapor Recompression ).Refer in evaporation, by indirect steam adiabatic compression, be sent to a kind of way that the heating chamber of evaporimeter is reused as thermal source subsequently.Indirect steam saturation temperature after compression raises, and forms enough heat transfer temperature differences with boiling liquid in device, therefore can again be used as heating agent.Therefore need only supplement a certain amount of work done during compression, just may utilize a large amount of latent heat of indirect steam.MVR method does not needs the thermal source of outside, and the energy consumption of system is only compressor and the energy consumption of all kinds of pump, so energy-saving effect is quite notable.Causing overall system architecture simple simultaneously, taking up an area volume little, operation and maintenance is simple, has considerable economic benefit.
Seawater also has substantial amounts of chlorion, at high temperature can cause serious corrosion to equipment.In addition, the equipment heat loss of low-temperature operation is relatively low, the substantial amounts of energy can be saved.Therefore, low-temp low-pressure desalinization side has significant advantage.
According to retrieving the patent information obtaining at present, Chinese invention patent the 201110104604.7th, 201010300875.5 and 200910138238.X, CN101591042A etc. be each provided with solar heat compression MVR sea water desalinating unit, but the solution gas in seawater is not all processed by these patents.The waste heat of 201010300875.5 pairs of strong brines and product fresh water does not also reclaim, and causes the significant wastage of the energy.Additionally, these patents are required for the requirement having harshness to working environment, equipment and equipment complexity, as a example by patent 200910138238.X, complete equipment is made up of large number quipments such as solar thermal collector, steam jet ejector, compressor, heating chamber, evaporimeter, heat exchangers, the complicated use limiting these techniques with floor space senior general of structure.
The technical scheme of the MVR sea water desalinating unit that Chinese invention patent 20031010755.7 is announced is to include steam mechanical compressor, multiple evaporimeter and the condenser pipe being placed in evaporimeter, spray system, fresh-water tank and foam removal net, the outlet of steam mechanical compressor is connected with the condenser pipe in the first single-effect evaporator in multiple evaporimeters, condenser pipe is connected with fresh-water tank, the steam (vapor) outlet of the first single-effect evaporator is connected with the condenser pipe in lower 1st effective evaporator, class is pushed into the last single-effect evaporator, and multiple evaporimeters realize multiple-effect stepped evaporation.This complex process equipment, and the waste heat of system generation is reclaimed.
To sum up, there is many deficiencies in current technology, at process aspect, does not considers the operating condition of desalinization, and the heat transfer that fixed gas causes hinders；Further, since substantial amounts of sea water desalinating unit is mounted in the big island of day and night temperature, outdoor, existing patent does not takes into account the operation stability of desalination system yet；In terms of device, there is not patent to propose integrated concept, be unfavorable for installing and using in the place of ship, limited floor space, and the pretreatment to seawater of traditional technique is carried out in sedimentation basin, it is impossible to realize integrated.
Content of the invention
The technical problem to be solved is to overcome the deficiencies in the prior art, provides the integrated sea water desalinating unit of efficient MVR that a kind of energy consumption is low, stable.
Present invention simultaneously provides low, stable, the easy to operate method for desalting seawater of a kind of energy consumption.
For solving problem above, a kind of technical scheme that the present invention takes is as follows:
A kind of efficient integrated sea water desalinating unit of MVR, it includes mainframe, pretreatment module, heating and waste heat recovery module, function of mechanical steam recompression module and the PLC control cabinet being arranged in mainframe, the evaporation module being arranged on outside mainframe, and connect pipeline；
Pretreatment module include connecting with seawater feed pipe from backwash filter, in seawater feed pipe, add the chemicals dosing plant of the required medicament of pretreatment, the seawater after filtering is divided into the three-way pilot valve on two tunnels；
Heating and waste heat recovery module include that the water side with three-way pilot valve passes through condensation fresh water heat exchanger and the strong brine heat exchanger of pipeline communication, the degasser that the seawater after heat exchanging is de-gassed respectively, and are used for storing the fresh water tank of condensation fresh water；
Evaporation module includes evaporimeter, for removing by the demister of the foam carried secretly in steam produced by evaporimeter；
Function of mechanical steam recompression module includes Mechanical Vapor Compression；
Connect pipeline and include the seawater pipeline that two ends connect with degasser and evaporimeter respectively, the condensation fresh water production water pipe that two ends connect with evaporimeter and condensation fresh water heat exchanger respectively, the strong brine discharge pipe that two ends connect with evaporimeter and strong brine heat exchanger respectively, the strong brine circulation pipe that two ends connect with seawater pipeline and strong brine discharge pipe respectively；
Described each module is all connected with PLC control cabinet and controlled.
Further, mainframe is cuboid, including inner frame and the panel being removably disposed on inner frame, panel built-in heat insulation material layer, panel is externally provided with sprayed coating, and panel offers air vent.
Further, the parts in described mainframe take piecemeal arrangement, and pretreatment module, heating and waste heat recovery module, function of mechanical steam recompression module and PLC control cabinet are set to one piece.
Preferably, described condensation fresh water heat exchanger, strong brine heat exchanger are plate type heat exchanger.
Preferably, described pretreatment module also includes being connected with PLC control cabinet and in check flow detection device, water temperature detection equipment and Turbidity measurement equipment.
Preferably, described degasser includes vacuum degassing tower.
Preferably, described evaporimeter is combined-type evaporator, and the evaporation cavity for evaporation of seawater and the condensation chamber for steam condensation of this combined-type evaporator combine in an equipment.This evaporimeter can reduce heat and dissipate the energy consumption brought, and by the tube wall heat transfer of heat-transfer pipe, can reduce heat transfer temperature difference, reduce the energy consumption of whole system.
Preferably, pressure checking device, water temperature detection equipment and brine strength detection equipment are installed in described evaporimeter.
Preferably, described compressor is VFC compressor, and detects equipment equipped with temperature and pressure.
Preferably, the described pipeline that connects also includes the recovery tube for the water that demister produces loops back evaporimeter.
Further, pretreatment module is additionally included on the pipeline between seawater chemicals dosing plant and seawater feed pipe the one-way control valve arranging.
Further, the one-way control valve that module also includes being arranged on strong brine circulation pipe is evaporated.
The another technical scheme that the present invention takes is:
A kind of method utilizing the integrated sea water desalinating unit of above-mentioned efficient MVR to carry out desalinization, it comprises the steps:
(1) sea water preprocessing: charging seawater is passed through and filters from backwash filter；
(2) seawater preheating: the seawater after filtering from backwash filter is divided into two tunnels by three-way pilot valve, preheats respectively through condensation fresh water heat exchanger and strong brine heat exchanger, makes seawater reach to evaporate temperature required；
(3) deaerate: the seawater after preheating enters degasser, remove room temperature incondensable gas；
(4) evaporating: the seawater after degassing enters evaporimeter together with the strong brine looping back, and seawater evaporates in evaporimeter, evaporation is carried out under negative pressure, and the vaporization of part seawater forms water vapour, and remaining seawater forms bittern；
(5) vapor recompression: the water vapour that seawater vaporization is formed enters mechanical vapor compressor after demister foam removal and is compressed, the steam that after compression, temperature and pressure improves enters in evaporimeter, condensation after discharging heat in vaporization chamber forms condensation fresh water, the condensation fresh water producing enters in condensation fresh water heat exchanger and delivers to fresh water tank with after charging seawater to make heat exchange, the water that foam removal produces enters seawater pipeline by recovery tube, sends in evaporimeter together with seawater；
(6) part circulation of the strong brine that evaporation produces, with sea water mixing, enters in evaporimeter, and remainder is passed in strong brine heat exchanger and carries out heat exchange with charging seawater.
According to the present invention, according to the actual conditions of seawater, medicament is added to process seawater optionally through chemicals dosing plant in charging seawater.Medicament is usually flocculant, antisludging agent, bactericide etc..
Preferably, in step (4), the operation pressure of evaporimeter is 9.6KPa ~ 84.5KPa, and evaporating temperature is 45 DEG C-95 DEG C.
Preferably, the temperature of the condensation fresh water entering condensation fresh water heat exchanger in step (2) is 60 ~ 100 DEG C, and the temperature of the strong brine entering strong brine heat exchanger is 45 ~ 95 DEG C.
Preferably, the seawater through condensation fresh water heat exchanger and the flow-rate ratio through the seawater of strong brine heat exchanger are 1:0.8 ~ 1.2.
Preferably, in step (6), loop back the 5% ~ 30% of the strong brine producing in evaporimeter.It is highly preferred that loop back the 8% ~ 15% of the strong brine producing in evaporimeter.It after will looping back the sea water mixing after the strong brine of evaporimeter and degassing, is passed through together in evaporimeter.It is highly preferred that squeezed into strong brine in seawater feed pipe by strong brine circulating pump, and strong brine circulation pump line is connected with strong brine discharge pipe, controlled the amount of circulation strong brine by controlling the flow of strong brine circulating pump.
Due to the employing of above technical scheme, the present invention compared with prior art has the advantage that
1st, the present invention is integrated device, facility compact, and volume is little, and assembly precision is high, can be processed according to module, can carry out according to function piecemeal, in-site installation and convenient disassembly when safeguarding；
2nd, the present invention uses and replaces traditional sedimentation basin to filter seawater from backwash filter; solve the deficiency that conventional apparatus cannot be integrated, meanwhile, substantially reduce pretreatment time; timing automatic can close from backwash filter and clean, decrease and safeguard and shut down brought impact；
3rd, being dissolved with the gas of certain ratio in seawater, these gases, when temperature raises and seawater salinity increases, can gradually separate out, be mixed in steam.When steam is when vaporization chamber condenses as heating medium, these steam will not condense, the existence of these fixed gases can make system condensing pressure raise, cause very big obstruction to diabatic process, apparatus of the present invention can be before the evaporation, by the solution gas removing in seawater, improve the heat-transfer effect of evaporimeter, reduce energy consumption；
4th, the present invention utilizes heat exchanger by the waste heat recovery of condensation fresh water out and strong brine in evaporimeter in order to pre-hot sea water, it is not necessary to carries out extra heat input to system, significantly reduces energy consumption；
5th, the present invention sets up strong brine circulation pipe, circulates part strong brine, can effectively maintain stablizing of system, has also reclaimed waste heat efficiently simultaneously, has reduced energy consumption.
6th, the energy consumption of the inventive method can be reduced to the 25% of tradition function of mechanical steam recompression method for desalting seawater and following, greatly reduces desalinization cost, and the present invention is relatively low to equipment and site requirements simultaneously, simple to operate, can realize applying on a large scale and popularizing.
Brief description
The present invention will be further described in detail with specific embodiment below in conjunction with the accompanying drawings:
Fig. 1 is the floor map of the integrated sea water desalinating unit of efficient MVR according to the present invention；
Fig. 2 is the structural representation of the integrated sea water desalinating unit of efficient MVR according to the present invention；
Wherein: A, mainframe；B, pretreatment module；C, heating and waste heat recovery module；D, evaporation module；E, function of mechanical steam recompression module；F, switch board；1st, chemicals dosing plant；2,8th, one-way control valve；3rd, from backwash filter；4th, three-way pilot valve；5th, fresh water heat exchanger is condensed；6th, strong brine heat exchanger；7th, vacuum degassing tower；9th, evaporimeter；10th, demister；11st, Mechanical Vapor Compression；12nd, fresh water tank；13rd, fresh water production water pipe is condensed；14th, strong brine discharge pipe；15th, strong brine circulation pipe；16th, seawater pipeline；17th, recovery tube.
Detailed description of the invention
Seeing Fig. 1, efficient mechanical vapor recompression sea water desalinating unit includes mainframe A, 5 modules and connects the connection pipeline of each module and provide extra large hydrodynamic pump.5 modules is respectively pretreatment module B；Heating and waste heat recovery module C；Evaporation module D；Function of mechanical steam recompression module E and switch board F.Each module produces according to same specification and assembles, it is achieved the versatility that product multi-series is arranged.In 5 modules in addition to evaporation module D, equal piecemeal is arranged in mainframe A, and the concrete arrangement of these modules is so that structure is the compactest is as the criterion.Evaporation module D is located at outside mainframe A, facilitates the clean and maintenance of evaporimeter.Mainframe A is cuboid, uses framework design, specifically includes inner frame, dismountable panel being arranged on inner frame, panel built-in heat insulation material layer, peripheral hardware sprayed coating.Air vent is offered on panel.
Pretreatment module B include connecting with seawater feed pipe from backwash filter 3, add the one-way control valve 2 that the 1st, the chemicals dosing plant of the required medicament of pretreatment is arranged on the pipeline between chemicals dosing plant 1 and seawater feed pipe in seawater feed pipe, and the seawater after filtering is divided into the three-way pilot valve 4 on two tunnels.In addition pretreatment module B also includes flow detection device, water temperature detection equipment and Turbidity measurement equipment; all detection equipment are all connected with PLC control cabinet F and controlled; when turbidity exceedes system thresholds; this equipment can be automatically turned off; to protect other modules to be contaminated, now need to change the filter assemblies from backwash filter 3.
Heating and waste heat recovery module C include the water side with three-way pilot valve 4 respectively by condensation fresh water heat exchanger 5 and the strong brine heat exchanger 6 of pipeline communication, vacuum degassing tower 7, and fresh water tank 12, outlet at condensation fresh water heat exchanger 5 and strong brine heat exchanger 6 is provided with temperature testing equipment, is connected and controlled with PLC control cabinet at condensation fresh water heat exchanger 5 and strong brine heat exchanger 6.Vacuum degassing tower 7 is arranged on the downstream of heat exchanger, the room temperature incondensable gas removing being used in the seawater after preheating, thus improves the heat-transfer effect of evaporimeter, reduces energy consumption.Taking vacuum outgas mode, equipment is simple, and during do not use any medicine.
Evaporation module D includes evaporimeter the 9th, demister the 10th, one-way control valve 8, and wherein evaporimeter 9 is the combined evaporative condenser that energy consumption is little.In evaporimeter 9, being used for operating pressure is negative pressure, and seawater seethes with excitement in evaporimeter and forms steam, and remaining seawater forms bittern.Pressure checking device, water temperature detection equipment and brine strength detection equipment are installed in evaporimeter 9.Steam is sucked compressor by mechanical commprssor 11 after being processed by demister 10 and is compressed.The steam re-enter evaporimeter 9 improving temperature and pressure is reused as heating medium.The recovered pipe of water 17 producing after foam removal comes back in evaporimeter 9.Function of mechanical steam recompression module includes Mechanical Vapor Compression 11, which is VFC compressor, and detects equipment equipped with temperature and pressure.
In this example, connect pipeline and mainly include the seawater pipeline 16 that two ends connect with vacuum degassing tower 7 and evaporimeter 9 respectively, the condensation fresh water production water pipe 13 that two ends connect with evaporimeter 9 and condensation fresh water heat exchanger 5 respectively, the strong brine discharge pipe 14 that two ends connect with evaporimeter 9 and strong brine heat exchanger 6 respectively, the strong brine circulation pipe 15 that two ends connect with seawater pipeline 16 and strong brine discharge pipe 14 respectively, the recovery tube 17 that two ends connect with the sea water conveying pipelines after demister 10 and preheating respectively, one-way control valve 8 is arranged on strong brine circulation pipe 15.
In this example, all movement parts and instrumentation in device are all to be carried out Automated condtrol by PLC control cabinet, and each module and control valve group are all connected and controlled with PLC switch board, it is achieved that the full automatic working of package unit and continuous prodution.
When the present invention carries out Seawater Treatment, the seawater first step is processed by chemicals dosing plant 1 with from backwash filter 3 in pretreatment module B, removes the impurity such as silt and adds necessary treatment agent.In heating and waste heat recovery module C, seawater reclaims strong brine and the waste heat of condensation fresh water through strong brine heat exchanger the 6th, condensed water heat exchanger 5, after temperature is improved, enter vacuum degassing tower 7 and remove incondensable gas, after then mixing with circulation strong brine, enter evaporation in evaporimeter 9.In evaporimeter 9, the seawater of spray absorbs heat boiling outside condenser pipe, and boiling seawater forms steam, and not boiling seawater forms strong brine.Steam is reused as heating medium by entering raising temperature and pressure re-enter evaporimeter after Mechanical Vapor Compression 11 compresses after demister 10 foam removal.The water that foam removal produces returns to evaporimeter 9 from recovery tube 17.A part for the strong brine that evaporation produces is circulated back in evaporimeter 9, and another part enters in strong brine heat exchanger 6 and discharges after heat exchange.
Application example
Using apparatus of the present invention to carry out desalinization, the water outlet ratio of fresh water is 50%, including the following step being carried out continuously:
(1), sea water preprocessing: add flocculant, antisludging agent etc. by chemicals dosing plant in charging seawater, and the seawater after agent-feeding treatment is passed through filters from backwash filter, remove the impurity such as silt；
(2), seawater preheating: the seawater of filtered about 20 DEG C is divided into two tunnels, enter strong brine heat exchanger 6 and condensation fresh water heat exchanger 5(flow rate ratio is 1:1), strong brine heat exchanger 6 and condensation fresh water heat exchanger 5 each lead into the strong brine of temperature about 75 DEG C and the condensation fresh water of temperature about 80 DEG C, pass through heat exchange, the temperature of seawater improves to about 70 DEG C, whole condensation fresh water that evaporation produces all are sent into condensation fresh water heat exchanger 5 and are carried out heat exchange, 90% feeding strong brine heat exchanger 6 of the strong brine that evaporation produces carries out heat exchange, the strong brine discharge after heat exchange.Condensation freshwater product after heat exchange is emitted into fresh water tank 12；
(3), deaerate: the seawater after preheating enters vacuum degassing tower 7, removes solution gas therein, and these solution gas are the incoagulable gas of room temperature, including oxygen, nitrogen, carbon dioxide etc.；
(4), evaporation, recompression: the seawater after degassing enters evaporimeter 9 after mixing with the strong brine accounting for strong brine total amount 10%, evaporation is carried out under temperature 70 C and pressure 45KPa, the steam being formed improves the condensation in-tube condensation that temperature to 85 DEG C and pressure is re-enter evaporimeter 9 after 57.8KPa and produces condensation fresh water after being compressed by Mechanical Vapor Compression 11 after demister 10 foam removal, the seawater simultaneously heating outside pipe forms steam.
Take this apparatus and method, produce 100m3Desalination water, required energy consumption is about 2000kW.h.
Comparative example
A kind of method for desalting seawater, the water outlet ratio of fresh water is 50%, and the method includes the following step being carried out continuously:
(1), seawater preheating: the seawater of about 20 DEG C carries out being preheated to 70 DEG C through the conventional seawater preheating device taking Electric heating；
(2), evaporation, recompression: seawater enters falling film evaporator, in falling film evaporator, evaporation is carried out under temperature 70 C and pressure 45KPa, seawater completes spray after distribution apparatus, the seawater of spray absorbs heat boiling outside condenser pipe, part forms steam, part forms strong brine, strong brine tank delivered to by strong brine, the steam being formed is produced condensation fresh water by improving the condensation in-tube condensation that temperature to 85 DEG C and pressure is re-enter evaporimeter after 57.8KPa after compressor compresses, condensation fresh water delivers to fresh water tank, and the seawater simultaneously heating outside pipe forms steam.Due to the existence of fixed gas, steam can discharge fixed gas gradually when condensation, can change the condensing pressure of steam, cause the fluctuation of system temperature after fixed gas is accumulative.
Produce 100m3Desalination water, required energy consumption is about 8000kW.h.
Above the present invention is described in detail; its object is to allow the personage being familiar with this art will appreciate that present disclosure and to be carried out; can not limit the scope of the invention with this; all equivalences made according to the Spirit Essence of the present invention change or modify, and all should cover within the scope of the present invention.
Claims (9)
1. the integrated sea water desalinating unit of an efficient MVR, it is characterized in that, including mainframe, it is arranged on the pretreatment module in described mainframe, heating and waste heat recovery module, function of mechanical steam recompression module and PLC control cabinet, the evaporation module being arranged on outside described mainframe, and connect pipeline；
Described pretreatment module include connecting with seawater feed pipe from backwash filter, in seawater feed pipe, add the chemicals dosing plant of the required medicament of pretreatment, the seawater after filtering is divided into the three-way pilot valve on two tunnels；
Described heating and waste heat recovery module include that the water side with described three-way pilot valve passes through condensation fresh water heat exchanger and the strong brine heat exchanger of pipeline communication, the degasser that the seawater after heat exchanging is de-gassed respectively, and are used for storing the fresh water tank of condensation fresh water；
Described evaporation module includes evaporimeter, for removing by the demister of the foam carried secretly in steam produced by evaporimeter；
Described function of mechanical steam recompression module includes Mechanical Vapor Compression；
Described connection pipeline includes the seawater pipeline that two ends connect respectively with described degasser and described evaporimeter, the condensation fresh water production water pipe that two ends connect with described evaporimeter and described condensation fresh water heat exchanger respectively, the strong brine discharge pipe that two ends connect with described evaporimeter and described strong brine heat exchanger respectively, the strong brine circulation pipe that two ends connect with described seawater pipeline and described strong brine discharge pipe respectively；
Described each module is all connected with PLC control cabinet and controlled；
Parts in described mainframe take piecemeal arrangement, and described pretreatment module, heating and waste heat recovery module, function of mechanical steam recompression module and PLC control cabinet are set to one piece.
2. the integrated sea water desalinating unit of efficient MVR according to claim 1, it is characterized in that, described mainframe is cuboid, including inner frame and the panel being removably disposed on described inner frame, described panel built-in heat insulation material layer, described panel is externally provided with sprayed coating, and described panel offers air vent.
3. the integrated sea water desalinating unit of efficient MVR according to claim 1, it is characterised in that described condensation fresh water heat exchanger, strong brine heat exchanger are plate type heat exchanger.
4. the integrated sea water desalinating unit of efficient MVR according to claim 1, it is characterised in that described pretreatment module also includes being connected with PLC control cabinet and in check flow detection device, water temperature detection equipment and Turbidity measurement equipment.
5. the integrated sea water desalinating unit of efficient MVR according to claim 1, it is characterised in that described degasser includes vacuum degassing tower.
6. the integrated sea water desalinating unit of efficient MVR according to claim 1, it is characterized in that, described evaporimeter is combined-type evaporator, the evaporation cavity for evaporation of seawater of this combined-type evaporator and the condensation chamber for steam condensation combine in an equipment, are provided with pressure checking device, water temperature detection equipment and brine strength detection equipment in described evaporimeter；Described compressor is VFC compressor, and detects equipment equipped with temperature and pressure.
7. one kind uses the method that the integrated sea water desalinating unit of efficient MVR as described in claim any one of claim 1 to 6 carries out desalinization, it is characterised in that comprise the steps:
(1) sea water preprocessing: charging seawater is passed through and filters from backwash filter；
(2) seawater preheating: the seawater after filtering from backwash filter is divided into two tunnels by three-way pilot valve, preheats respectively through condensation fresh water heat exchanger and strong brine heat exchanger, makes seawater reach to evaporate temperature required；
(3) deaerate: the seawater after preheating enters degasser, remove room temperature not aggegation gas；
(4) evaporating: the seawater after degassing enters evaporimeter together with the strong brine looping back, and seawater evaporates in evaporimeter, evaporation is carried out under negative pressure, and the vaporization of part seawater forms water vapour, and remaining seawater forms bittern；
(5) vapor recompression: the water vapour that seawater vaporization is formed enters mechanical vapor compressor after demister foam removal and is compressed, the steam that after compression, temperature and pressure improves enters in evaporimeter, condensation after discharging heat in vaporization chamber forms condensation fresh water, the condensation fresh water producing enters in condensation fresh water heat exchanger and delivers to fresh water tank with after charging seawater to make heat exchange, the water that foam removal produces enters seawater pipeline by recovery tube, sends in evaporimeter together with seawater；
(6) part circulation of the strong brine that evaporation produces, with sea water mixing, enters in evaporimeter, and remainder is passed in strong brine heat exchanger and carries out heat exchange with charging seawater.
8. method according to claim 7, it is characterized in that: in step (4), the operation pressure of evaporimeter is 9.6KPa ~ 84.5KPa, evaporating temperature is 45 DEG C-95 DEG C, the temperature of the condensation fresh water entering condensation fresh water heat exchanger in step (2) is 60 ~ 100 DEG C, the temperature of the strong brine entering strong brine heat exchanger is 45 ~ 95 DEG C, is 1:0.8 ~ 1.2 through condensing the seawater of fresh water heat exchanger and the flow-rate ratio of the seawater through strong brine heat exchanger.
9. the method according to claim 7 or 8, it is characterised in that: in step (6), loop back the 5% ~ 30% of the strong brine producing in evaporimeter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410546383.2A CN104310687B (en) | 2014-10-16 | 2014-10-16 | Efficient MVR integrated seawater desalination device and seawater desalination method |
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| CN201410546383.2A CN104310687B (en) | 2014-10-16 | 2014-10-16 | Efficient MVR integrated seawater desalination device and seawater desalination method |
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| CN104310687A CN104310687A (en) | 2015-01-28 |
| CN104310687B true CN104310687B (en) | 2016-11-23 |
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| CN104773779B (en) * | 2015-03-13 | 2017-06-30 | 沈阳航空航天大学 | Tide energy solar energy and mechanical steam recompression desalinization integrated system |
| CN104803538B (en) * | 2015-05-18 | 2017-01-04 | 山东豪迈化工技术有限公司 | A kind of low cost, low energy consumption process the process of sea water |
| CN105953625A (en) * | 2016-05-03 | 2016-09-21 | 武汉理工大学 | Waste heat utilization system and method for electromagnetic eddy current brake |
| CN106082375A (en) * | 2016-08-23 | 2016-11-09 | 轶为机电设备（上海）有限公司 | A kind of evaporation type sea water desalting plant |
| CN106938145A (en) * | 2017-03-16 | 2017-07-11 | 江苏乐科节能科技股份有限公司 | The direct driving machine tool vapor recompression evaporation drying system and method for wind-force |
| CN107651805A (en) * | 2017-11-21 | 2018-02-02 | 青岛新欧亚能源有限公司 | Press vapour method sea water desalinating unit and method |
| CN112794390A (en) * | 2020-12-31 | 2021-05-14 | 青海宜化化工有限责任公司 | Treatment device for chlor-alkali chemical wastewater and use method thereof |
| CN114956223B (en) * | 2021-09-14 | 2023-05-12 | 深圳市图灵科创产业发展有限公司 | Seawater concentration and desalination treatment system and treatment control method |
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| CN101759238B (en) * | 2009-12-16 | 2011-12-07 | 南京工业大学 | Ribbed plate type seawater desalinating device |
| CN102531256B (en) * | 2010-12-24 | 2013-09-04 | 中国石油天然气股份有限公司 | Process method and device for desalting seawater at low temperature |
| CN103806964A (en) * | 2012-11-06 | 2014-05-21 | 蓝瑚科技有限公司 | Method and system for comprehensively utilizing steam turbine dead steam latent heat |
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