CN103073077B - Multi-process, low-temperature and multiple-effect distilled seawater desalination system - Google Patents
Multi-process, low-temperature and multiple-effect distilled seawater desalination system Download PDFInfo
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- CN103073077B CN103073077B CN201310007965.9A CN201310007965A CN103073077B CN 103073077 B CN103073077 B CN 103073077B CN 201310007965 A CN201310007965 A CN 201310007965A CN 103073077 B CN103073077 B CN 103073077B
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Abstract
The invention relates to the technical field of seawater desalination, in particular to a multi-process, low-temperature and multiple-effect distilled seawater desalination system to improve the adaptability of the multi-process, low-temperature and multiple-effect distilled seawater desalination system. The multi-process, low-temperature and multiple-effect distilled seawater desalination system comprises a condenser, at least two evaporators connected in series, heat pumps connected with the evaporators, at least one seawater pre-heater which is arranged at a feed seawater pipeline connected between a water outlet of the condenser and water inlets of effect evaporators in a first evaporation group, a steam pipeline, a feed seawater pipeline, a concentrated seawater discharge pipeline, a product water discharge pipeline, a seawater delivery pipeline and a seawater countercurrent delivery pipeline connecting a material steam source, a material seawater source, the effect evaporators with the condenser and control valves which are arranged on the pipelines.
Description
Technical field
The present invention relates to field of sea water desalting technology, specially refer to a kind of multipaths low temperature multiple-effect distillation seawater desalination system.
Background technology
The high evaporation temperature that low temperature multiple-effect distillation sea water desalting technology typically refers to seawater is lower than the desalination techniques of 70 ℃, low temperature multiple-effect distillation seawater desalination system is by a series of evaporator series, with a certain amount of steam and seawater, be input in the vaporizer of series connection, in vaporizer, steam and seawater carry out heat exchange, make seawater evaporation and condensation repeatedly, thereby obtain being multiple times than the desalination process of the distilled water of quantity of steam.The low temperature multiple-effect distillation sea water system adopting at present can be divided into by flow process: following current, adverse current and advection flow process.Seawater adds from high temperature effect, and successively through each effect, and concentrated seawater is discharged as following current flow process from lowest temperature effect; Seawater adds from low temperature effect, and each effect is crossed in reverse flow, and concentrated seawater is discharged as countercurrent flow from high temperature effect; Seawater adds from each effect respectively, and concentrated seawater is discharged as advection flow process from this effect.
The defect that prior art exists is, what existing low temperature multiple-effect distillation seawater desalination system adopted is single flow process, cannot adapt to multiple treatment scheme, when Production Flow Chart need to change, can only reconstruct new low temperature multiple-effect distillation seawater desalination system, adaptability is lower.
Summary of the invention
The object of the present invention is to provide a kind of multipaths low temperature multiple-effect distillation seawater desalination system, in order to improve the adaptability of low temperature multiple-effect distillation seawater desalination system.
To achieve these goals, the invention provides following technical scheme:
A multipaths low temperature multiple-effect distillation seawater desalination system, comprising:
The condenser being communicated with raw material seawater source;
The evaporation group of connecting with described condenser, evaporation group comprises the vaporizer of at least two effect series connection; Wherein, be positioned at one end of described evaporation group and the vaporizer that is communicated with described condenser inlet mouth is tail vaporizer; Be positioned at vaporizer headed by the vaporizer of the described evaporation group the other end;
The steam-pipe being communicated with raw material vapour source and first vaporizer, and be arranged on the heat pump on steam-pipe;
Imitate with each the charging seawater pipeline that described vaporizer seawater water inlet and described condenser seawater water outlet are communicated with respectively, be arranged at least one the seawater preheating device on described charging seawater pipeline, and be arranged on described charging seawater pipeline and the control valve corresponding with every 1st effective evaporator seawater water inlet except first vaporizer;
Imitate with each the product water discharge tube that described vaporizer product water water outlet and described condenser product water water outlet are communicated with respectively;
Imitate with each the concentrated seawater discharge tube that described vaporizer seawater water outlet is communicated with respectively, and be arranged on the control valve on each described concentrated seawater discharge tube;
Imitate the charging seawater pipeline at described vaporizer seawater water inlet place and the sea water conveying pipelines that concentrated seawater discharge tube is communicated with each except first vaporizer respectively; And be arranged on two control valves on each described sea water conveying pipelines;
Imitate described vaporizer seawater water outlet with each respectively and imitate described vaporizer along the seawater adverse current transport pipe of the seawater water inlet connection of the tail vaporizer vaporizer that extremely first vaporizer direction is connected with this, and be arranged on the control valve on each seawater adverse current transport pipe, and each the seawater adverse current transfer lime except the corresponding seawater adverse current of first vaporizer transport pipe is all connected on the sea water conveying pipelines between two control valves corresponding with it.
Imitate described vaporizer seawater water outlet with each respectively and imitate described vaporizer along the seawater adverse current transport pipe of the seawater water inlet connection of the tail vaporizer vaporizer that extremely first vaporizer direction is connected with this, and be arranged on the control valve on each seawater adverse current transport pipe, and each the seawater adverse current transfer lime except the corresponding seawater adverse current of first vaporizer transport pipe is all connected on the sea water conveying pipelines between two control valves corresponding with it.
Preferably, described multipaths low temperature multiple-effect distillation seawater desalination system also comprises: be communicated with described condenser air outlet, for carrying out degassed vacuum extractor to entering the raw material seawater of described condenser.
Preferably, described vaporizer is tube and shell heat exchanger.
Preferably, described seawater preheating device is for steaming steam water heat exchanger.
Preferably, the inlet mouth of described seawater preheating device is communicated with described vaporizer, and the product water water outlet of described seawater preheating device is communicated with described product water discharge tube.
Preferably, described heat pump is thermo compression injector.
Preferably, described heat pump is also communicated with the air outlet of described tail vaporizer.
Preferably, above-mentioned multipaths low temperature multiple-effect distillation seawater desalination system also comprises: the Mare Frigoris water discharge spout road being communicated with described condenser seawater water outlet and described charging seawater pipeline.
Preferably, above-mentioned multipaths low temperature multiple-effect distillation seawater desalination system also comprises: be arranged on the middle charge pump on each described seawater adverse current transport pipe;
Be arranged on the concentrated seawater pump on described concentrated seawater discharge tube;
Be arranged on the product water pump on described product water discharge tube;
Be arranged on the sea-water pump of the seawater water inlet of described condenser;
Be arranged on the pan feeding sea-water pump on described charging seawater pipeline;
Be arranged on the cooling sea water pump on described Mare Frigoris water discharge spout road.
Preferably, the respectively corresponding fresh water flash tank of each single-effect evaporator and described condenser, described in each, fresh water flash tank water-in is communicated with the product water outlet of corresponding vaporizer and condenser, and all fresh water flash tanks are connected by described product water discharge tube.
Preferably, the respectively corresponding concentrated seawater flash tank of each single-effect evaporator and described condenser, and described concentrated seawater flash tank is connected by described concentrated seawater discharge tube.
Multipaths low temperature multiple-effect distillation seawater desalination system provided by the invention, comprise: each single-effect evaporator of connecting successively, steam-pipe, charging seawater pipeline, concentrated seawater discharge tube, product water discharge tube, sea water conveying pipelines, seawater adverse current transport pipe that each single-effect evaporator and condenser are coupled together, and the control valve on each pipeline being arranged on.In use, by opening and closing the control valve on each pipeline, the steam and the seawater that enter into each single-effect evaporator are circulated with different directions, realized the mixture length that advection flow process, following current flow process, countercurrent flow and the above-mentioned several flow process of low temperature multiple-effect distillation seawater desalination system when processing seawater is arbitrarily made with.Therefore, multipaths low temperature multiple-effect distillation seawater desalination system provided by the invention can adapt to different brine disposal flow processs, has improved the adaptability of low temperature multiple-effect distillation seawater desalination system.
Accompanying drawing explanation
The structure iron of the multipaths low temperature multiple-effect distillation seawater desalination system that Fig. 1 provides for one embodiment of the invention;
Fig. 2 is the equivalent schematic that multipaths low temperature multiple-effect distillation seawater desalination system of the present invention adopts following current flow process;
Fig. 3 is the equivalent schematic that multipaths low temperature multiple-effect distillation seawater desalination system of the present invention adopts countercurrent flow;
Fig. 4 is the equivalent schematic that multipaths low temperature multiple-effect distillation seawater desalination system of the present invention adopts advection flow process;
Fig. 5 is the equivalent schematic that multipaths low temperature multiple-effect distillation seawater desalination system of the present invention adopts following current-advection mixture length.
Reference numeral:
1～5:1 to 5 vaporizer; 6: condenser; 7～11:7 to 11 concentrated seawater flash tank;
12～16:12 to 16 fresh water flash tank; 17～18:17 to 18 seawater preheating device; 19: heat pump;
20: pan feeding sea-water pump; Charge pump in the middle of 21～24:21 to 24; 25: cooling sea water pump;
26: sea-water pump; 27: concentrated seawater pump; 28: product water pump;
29～53: control valve; 54: raw material seawater source; 55: raw material vapour source;
56: concentrated seawater discharge tube; 57: Mare Frigoris water discharge spout road; 58; Charging seawater pipeline;
59: product water discharge tube; 60: sea water conveying pipelines; 61: steam-pipe;
62: seawater adverse current transport pipe.
Embodiment
Existing low temperature multiple-effect distillation seawater desalination system flow process is single, just can only adopt fixing flow process to process seawater after low temperature multiple-effect distillation seawater desalination system assembles, the flow process of changed handling seawater more, and the scope of application is smaller.
In view of this, the invention provides a kind of improved technical scheme, by increasing the connecting pipe of each single-effect evaporator and corresponding control valve is set on connecting pipe in low temperature multiple-effect distillation seawater desalination system, control between each single-effect evaporator and the different connections of each single-effect evaporator and charging seawater pipeline, thereby realize and can after assembling, adopt as required following current flow process at multipaths low temperature multiple-effect distillation seawater desalination system, countercurrent flow, the mixture length that advection flow process or above-mentioned several flow process are mixed arbitrarily, expanded the scope of application of low temperature multiple-effect distillation seawater desalination system.
In order to make those skilled in the art better understand technical scheme of the present invention, below in conjunction with Figure of description, the embodiment of the present invention is described in detail.
As shown in Figure 1, the embodiment of the present invention provides a kind of multipaths low temperature multiple-effect distillation seawater desalination system, comprising:
The condenser 6 being communicated with raw material seawater source 54;
With the evaporation group that described condenser 6 is connected, evaporation group comprises the vaporizer of at least two effect series connection; Wherein, be positioned at one end of described evaporation group and the vaporizer that is communicated with described condenser 6 inlet mouths is tail vaporizer; Be positioned at vaporizer headed by the vaporizer of the described evaporation group the other end;
The steam-pipe 61 being communicated with raw material vapour source 55 and first vaporizer, and be arranged on the heat pump 19 on steam-pipe 61;
Imitate with each the charging seawater pipeline 58 that described vaporizer seawater water inlet and described condenser 6 seawater water outlets are communicated with respectively, be arranged at least one the seawater preheating device on described charging seawater pipeline 58, and be arranged on described charging seawater pipeline 58 and the control valve corresponding with every 1st effective evaporator seawater water inlet except first vaporizer;
Imitate with each the product water discharge tube 59 that described vaporizer product water water outlet and described condenser 6 product water water outlets are communicated with respectively;
Imitate with each the concentrated seawater discharge tube 56 that described vaporizer seawater water outlet is communicated with respectively, and be arranged on the control valve on each described concentrated seawater discharge tube 56;
Imitate the charging seawater pipeline 58 at described vaporizer seawater water inlet place and the sea water conveying pipelines 60 that concentrated seawater discharge tube 56 is communicated with each except first vaporizer respectively; And be arranged on two control valves on each described sea water conveying pipelines 60;
Imitate described vaporizer seawater water outlet with each respectively and imitate described vaporizer along the seawater adverse current transport pipe 62 of the seawater water inlet connection of the tail vaporizer vaporizer that extremely first vaporizer direction is connected with this, and be arranged on the control valve on each seawater adverse current transport pipe 62, and each the seawater adverse current transfer lime except the corresponding seawater adverse current of first vaporizer transport pipe 62 is all connected on the sea water conveying pipelines 60 between two control valves corresponding with it.
Multipaths low temperature multiple-effect distillation seawater desalination system provided by the invention can adopt according to the concrete condition of production different flow processing seawater, the mixture length that can adopt following current flow process, countercurrent flow, advection flow process and above-mentioned two or more flow process is mixed.Concrete working process is as follows:
(1) following current flow process
Open control valve 33,34,35,36,37,38,39,40,41,46,47,48, close all the other control valves, form the pipeline of the multipaths low temperature multiple-effect distillation seawater desalination system that adopts following current flow process, as shown in Figure 2, Fig. 2 is the equivalent schematic that multipaths low temperature multiple-effect distillation seawater desalination system of the present invention adopts following current flow process.In this following current flow process, steam-pipe 61 is connected with the inlet mouth of first vaporizer, condenser 6 is connected with first vaporizer by charging seawater pipeline 58, each single-effect evaporator is connected successively along first vaporizer to the direction of tail vaporizer, the product water water outlet of each single-effect evaporator is connected with product water discharge tube 59 respectively, the concentrated seawater discharge tube 56 that the seawater water outlet of tail vaporizer is communicated with.In following current flow process, flowing to of raw material seawater and raw material steam is identical.
Utilize the working process of following current flow processing seawater of the multipaths low temperature multiple-effect distillation seawater desalination system that the embodiment of the present invention provides as follows:
First, a raw material seawater part enters preheating in condenser 6, enters the further preheating of at least one seawater preheating device, parallel the entering in first vaporizer of raw material seawater after preheating.The unwanted raw material seawater of another part vaporizer is by refrigerated sea water discharge tube 57 discharge systems.
Raw material steam enters in first vaporizer after heat pump 19, with and the seawater that is advanced into first vaporizer carry out heat exchange, the product water water outlet by first vaporizer after vapour condensation enters in product water discharge tube 59.One of raw material seawater after heat exchange flashes to the preliminary concentrated seawater of secondary steam and remaining warp and enters respectively in the heat-exchanging tube bundle of the lower 1st effective evaporator being adjacent and in shell, seawater after secondary steam and preliminary concentrating again carries out heat exchange in this vaporizer, seawater is further evaporated, concentrated, and the product water water outlet by this effect after secondary steam condensation enters in product water discharge tube 59.The rest may be inferred, and extra large water and steam carries out heat exchange in every single-effect evaporator, and seawater is further concentrated, and the product water of formation collects in discharge system in product water discharge tube 59.The concentrated seawater being condensed in tail vaporizer is by concentrated seawater discharge tube 56 discharge systems.A secondary steam part in tail vaporizer enters into condenser 6 and is used for raw material seawater to carry out preheating, and the product water forming after secondary steam condensation enters in product water discharge tube 59; Another part enters into steam-pipe 61, and after raw material vapor mixing, again enters into first vaporizer, carries out heat exchange with raw material seawater.
(2) countercurrent flow
The working process that the countercurrent flow of the multipaths low temperature multiple-effect distillation seawater desalination system providing by the embodiment of the present invention is processed seawater is as follows:
First, a raw material seawater part enters preheating in condenser 6, and the raw material seawater after preheating enters in tail vaporizer, and is full of successively each single-effect evaporator.The unwanted raw material seawater of another part vaporizer is by refrigerated sea water discharge tube 57 discharge systems.
Raw material steam enters in first vaporizer after heat pump 19.Raw material steam and seawater in first vaporizer carry out heat exchange, after raw material steam heat-exchanging, are condensed into product water, and the product water water outlet by first vaporizer enters in product water discharge tube 59.After the seawater to make heat exchange of first vaporizer, a part flashes to secondary steam and enters in the heat-exchanging tube bundle of lower 1st effective evaporator, and the seawater in continuation and this single-effect evaporator carries out heat exchange, the rest may be inferred, the secondary steam steam that evaporation of seawater goes out will be full of in each single-effect evaporator, and carry out heat exchange with the seawater entering in each single-effect evaporator, raw material seawater is evaporated successively along the flow process from tail vaporizer to first vaporizer, concentrated, finally from the seawater water outlet of first vaporizer, be discharged into 56 discharges of concentrated seawater discharge tube, the product water that the secondary steam that raw material steam and seawater produce forms after heat exchange collects in discharge system in product water discharge tube 59.A secondary steam part after heat exchange in tail vaporizer enters into condenser 6 and is used for raw material seawater to carry out preheating, enters in product water discharge tube 59 after secondary steam condensation; Another part enters into steam-pipe 61, and after raw material vapor mixing, again enters into first vaporizer, carries out heat exchange with seawater.
(3) advection flow process
Utilize the working process of advection flow processing seawater of the multipaths low temperature multiple-effect distillation seawater desalination system that the embodiment of the present invention provides as follows:
First, a raw material seawater part enters preheating in condenser 6, and the raw material seawater after preheating enters in each single-effect evaporator.The unwanted raw material seawater of another part vaporizer is by refrigerated sea water discharge tube 57 discharge systems.
Raw material steam enters in first vaporizer after heat pump 19, carry out heat exchange with the raw material seawater in first vaporizer, raw material vapor condensation after heat exchange becomes product water, product water water outlet by first vaporizer is discharged in product water discharge tube 59, raw material seawater in first vaporizer flashes to secondary steam in heat exchange rear portion, seawater water outlet by first vaporizer after a part is concentrated is discharged in concentrated seawater discharge tube 56, the secondary steam that raw material seawater forms is full of each single-effect evaporator successively, and carry out heat exchange with the raw material seawater in each single-effect evaporator, the product water forming after secondary steam heat exchange is pooled to the interior discharge system of product water discharge tube 59 by the product water water outlet of each effect, a secondary steam part in tail vaporizer enters into condenser 6 and is used for raw material seawater to carry out preheating, the product water forming after secondary steam condensation enters in product water discharge tube 59, another part enters into steam-pipe 61, and after raw material vapor mixing, again enters into first vaporizer, carries out heat exchange with raw material seawater.The seawater being concentrated in each single-effect evaporator enters in concentrated seawater discharge tube 56 by the seawater water outlet of each single-effect evaporator.
(4) mixture length
There is multiple mixing situation in mixture length, can adopt according to the different conditions of production different mixture lengths.The mixture length of the various combinations such as following current-advection, adverse current-advection, following current-adverse current.As: open control valve 29,30,31,32,33,34,35,36,37,38,39,40,41,46,47,48,50,51,52,53, close all the other control valves, form the mixture length of following current-advection; Open control valve 29,30,31,32,33,34,35,36,37,39,40,41,42,43,44,45,50,51,52,53, close all the other control valves, form the mixture length of adverse current-advection.
The mixture length of following current-advection of take is example, as shown in Figure 5, utilizes the mixture length of the multipaths low temperature multiple-effect distillation seawater desalination system that the embodiment of the present invention provides to process the working process of seawater as follows:
First, raw material seawater enters preheating in condenser 6, and the raw material seawater after preheating enters in each single-effect evaporator.
Raw material steam enters in first vaporizer after heat pump 19.And carry out heat exchange with the raw material seawater in first vaporizer, raw material vapor condensation after heat exchange becomes product water to pass through product water discharge tube 59 discharge systems, a seawater part after heat exchange flashes to secondary steam, the remaining seawater being concentrated is by concentrated seawater discharge tube 56 discharge systems, the secondary steam producing enters into lower 1st effective evaporator, and carries out heat exchange with the seawater in this single-effect evaporator.The seawater that enters into each single-effect evaporator moves along two pipelines, seawater after a part is evaporated, concentrated enters in concentrated seawater discharge tube 56 by the seawater water outlet of this single-effect evaporator, another part evaporation, the seawater after concentrated enter into lower 1st effective evaporator, and continue to carry out heat exchange with the secondary steam entering in this single-effect evaporator after the sea water mixing of this single-effect evaporator.The seawater entering in concentrated seawater discharge tube 56 is directly discharged.The product water that the product water that each effect produces and condenser 6 produce is by product water discharge tube 59 discharge systems.
Therefore, multipaths low temperature multiple-effect distillation seawater desalination system of the present invention can adopt according to the different conditions of production different brine disposal flow processs, has improved the adaptability that multipaths low temperature multiple-effect distillation seawater desalination system meets different need of productions.
Take quintuple effect evaporator and two seawater preheating devices is below example, the multipaths low temperature multiple-effect distillation seawater desalination system that the embodiment of the present invention of further explaining provides.
Continuation is referring to Fig. 1, multipaths low temperature multiple-effect distillation seawater desalination system comprises: vaporizer 1, vaporizer 2, vaporizer 3, vaporizer 4, the vaporizer 5 of connecting successively, vaporizer headed by vaporizer 1 wherein, vaporizer 5 is tail vaporizer, vaporizer is tube and shell heat exchanger in the present embodiment; The condenser 6 being communicated with raw material seawater source 54; The steam-pipe 61 being communicated with raw material vapour source 55 and first vaporizer, and be arranged on the heat pump 19 on steam-pipe 61, heat pump 19 is also communicated with the air outlet of tail vaporizer; The charging seawater pipeline 58 being communicated with each single-effect evaporator seawater water inlet and condenser 6 seawater water outlets, be arranged on seawater preheating device 17 and seawater preheating device 18 on the charging seawater pipeline 58 that is communicated with condenser 6 and each single-effect evaporator, seawater preheating device 17 and seawater preheating device 18 are steaming steam water heat exchanger; The inlet mouth that steams steam water heat exchanger is communicated with steam-pipe 61, and the product water water outlet that steams steam water heat exchanger is communicated with product water discharge tube 59.The concentrated seawater discharge tube 56 being communicated with each single-effect evaporator seawater water outlet, the Mare Frigoris water discharge spout road 57 being communicated with described condenser 6 seawater water outlets and described charging seawater pipeline 58, the product water discharge tube 59 being communicated with each single-effect evaporator product water water outlet; The sea water conveying pipelines 60 that the seawater water outlet of each single-effect evaporator is communicated with seawater water inlet along first vaporizer to the adjacent vaporizer of tail vaporizer direction; The seawater adverse current transport pipe 62 that the seawater water outlet of each single-effect evaporator is communicated with seawater water inlet along tail vaporizer to the adjacent vaporizer of first vaporizer direction, and be separately positioned on each control valve on steam-pipe 61, charging seawater pipeline 58, concentrated seawater discharge tube 56, product water discharge tube 59, sea water conveying pipelines 60, seawater adverse current transport pipe 62.
In above-described embodiment, the principle of work of multipaths low temperature multiple-effect distillation seawater desalination system is as follows, by condenser 6, raw material seawater is transported in each single-effect evaporator, and carry out heat exchange with the steam in each single-effect evaporator, the seawater that makes to enter in each single-effect evaporator evaporates, concentrates, the product water obtaining is by product water discharge tube 59 discharge systems, and the seawater after evaporating, concentrating is by concentrated seawater discharge tube 59 discharge systems.According to the different situations of actual production, multipaths low temperature multiple-effect distillation seawater desalination system of the present invention can provide different processing seawater flow processs, as the mixture length of following current flow process, countercurrent flow, advection flow process and above-mentioned several flow processs.In order to understand more easily the technical program, the principle of work of following current flow process of multipaths low temperature multiple-effect distillation seawater desalination system of the present invention of take below describes as example.
Open control valve 33,34,35,36,37,38,39,40,41,46,47,48, close all the other control valves, as shown in Figure 2, part concentrated seawater discharge tube 56 and sea water conveying pipelines 60 series connection of the direction along first vaporizer to tail vaporizer by each single-effect evaporator.
Raw material seawater enters into charging seawater pipeline 58 by condenser 6, and a part is discharged through Mare Frigoris water discharge spout road 57, and a part also heats through seawater preheating device 17 and seawater preheating device 18, and the raw material seawater after heating enters in the shell of vaporizer 1.Simultaneously, raw material steam enters in the heat-exchanging tube bundle of vaporizer 1 after heat pump 19, with and the raw material seawater that is advanced in vaporizer 1 shell carry out heat exchange, the raw material vapor condensation after heat exchange becomes product water, the product water water outlet by vaporizer 1 enters in product water discharge tube 59.A raw material seawater part after heat exchange is evaporated into secondary steam, a part is concentrated, in the heat-exchanging tube bundle that the secondary steam forming and concentrated seawater enter into respectively vaporizer 2 and in shell, and in vaporizer 2, again carry out heat exchange, seawater is further evaporated, concentrated, and the product water of generation enters in product water discharge tube 59 by the product water water outlet of vaporizer 2.Seawater and secondary steam carry out successively heat exchange in vaporizer 3, vaporizer 4 and vaporizer 5, and seawater is further concentrated.The product water forming collects in discharge system in product water discharge tube 59, and the concentrated seawater being condensed in vaporizer 5 is by concentrated seawater discharge tube 56 discharge systems.A secondary steam part in vaporizer 5 enters into condenser 6 and is used for raw material seawater to carry out preheating, and the product water forming after secondary steam condensation enters in product water discharge tube 59; Another part secondary steam enters into steam-pipe 61, and after raw material vapor mixing, again enters into vaporizer 1, carries out heat exchange with raw material seawater.
Except above-mentioned following current flow process, the multipaths low temperature multiple-effect distillation seawater desalination system that this embodiment provides can also be selected other different flow processing seawater, as: advection flow process, countercurrent flow and various mixture length.
Preferably, multipaths low temperature multiple-effect distillation seawater desalination system also comprises: be communicated with described condenser 6 air outlets, for carrying out degassed vacuum extractor (not shown in FIG.) to entering the raw material seawater of described condenser 6.Vacuum extractor can be extracted non-condensable gases in seawater out, and the non-condensable gases that prevents from being blended in raw material seawater causes damage to the equipment of multipaths low temperature multiple-effect distillation seawater desalination system.
Preferably, multipaths low temperature multiple-effect distillation seawater desalination system also comprises: be arranged on the middle charge pump on each described seawater adverse current transport pipe 62, except first vaporizer, each single-effect evaporator is a corresponding middle charge pump respectively, charge pump 24 in the middle of vaporizer 2 is corresponding, charge pump 23 in the middle of vaporizer 3 is corresponding, charge pump 22 in the middle of vaporizer 4 is corresponding, charge pumps 21 in the middle of vaporizer 5 is corresponding, in the middle of each, charge pump provides transmitting power to interior seawater for seawater adverse current transfer lime; Be arranged on the concentrated seawater pump 27 on described concentrated seawater discharge tube 56; Be arranged on the product water pump 28 on described product water discharge tube 59; Be arranged on the sea-water pump 26 of the seawater water inlet of described condenser 6; Be arranged on the pan feeding sea-water pump 20 on described charging seawater pipeline 58; Be arranged on the cooling sea water pump 25 on described Mare Frigoris water discharge spout road 57.On each pipeline, set up the pump of obstructed purposes, can be convenient to the circulation of the liquid in pipeline, improve the working efficiency of native system.
Continuation is referring to Fig. 1, in order to make full use of steam heat, in above-mentioned multipaths low temperature multiple-effect distillation seawater desalination system, the respectively corresponding fresh water flash tank of each single-effect evaporator, described in each, fresh water flash tank water-in is communicated with the product water outlet of corresponding vaporizer, and all fresh water flash tanks are by described product water discharge tube 59 series connection, the vaporizer that described fresh water flash tank air outlet is adjacent with corresponding vaporizer or the inlet mouth of condenser 6 are communicated with, and all fresh water flash tanks are connected successively by described product water discharge tube.In the present embodiment, fresh water flash tank 12 is communicated with corresponding vaporizer 1, fresh water flash tank 13 is communicated with corresponding vaporizer 2, fresh water flash tank 14 is communicated with corresponding vaporizer 3, fresh water flash tank 15 is communicated with corresponding vaporizer 4, fresh water flash tank 16 is communicated with corresponding vaporizer 5, and above-mentioned fresh water flash tank is by 59 series connection of product water discharge tube.The water of condensation producing in vaporizer 1 enters fresh water flash tank 12 as product water and carries out flash distillation, and flash steam enters vaporizer 2; Complete mixing evaporator 2 produces after flash distillation product water and enter fresh water flash tank 13 and carry out flash distillation, flash steam enters vaporizer 3, the like, final all product waters are pooled to after flash tank 16, by product water pump 28, are promoted and are discharged system as product water.
Continuation is referring to Fig. 1, in order to make full use of steam heat, in above-mentioned multipaths low temperature multiple-effect distillation seawater desalination system, each single-effect evaporator and the respectively corresponding concentrated seawater flash tank of described condenser 6, and described concentrated seawater flash tank is by described concentrated seawater discharge tube 56 series connection.And described in each, the inlet mouth of the concentrated seawater flash tank air outlet vaporizer adjacent with corresponding vaporizer or condenser 6 is communicated with.In the present embodiment, concentrated seawater flash tank 7 is communicated with corresponding vaporizer 1, concentrated seawater flash tank 8 is communicated with corresponding vaporizer 2, concentrated seawater flash tank 9 is communicated with corresponding vaporizer 3, concentrated seawater flash tank 10 is communicated with corresponding vaporizer 4, concentrated seawater flash tank 11 is communicated with corresponding vaporizer 5, and above-mentioned concentrated seawater flash tank is by 56 series connection of concentrated seawater discharge tube.The concentrated seawater producing in vaporizer 1 enters concentrated seawater flash tank 7 and carries out flash distillation, and flash steam enters vaporizer 2; Complete mixing evaporator 2 produces after flash distillation concentrated seawater and enter concentrated seawater flash tank 8 and carry out flash distillation, flash steam enters vaporizer 3, the like, final all concentrated seawaters are pooled to after flash tank 11, by concentrated seawater pump 27, are promoted and are discharged system as concentrated seawater.
In sum, utilize multipaths low temperature multiple-effect distillation seawater desalination system provided by the invention, when seawater being desalinated to processing, can select different processing seawater flow processs by the control valve on pipeline.Meanwhile, utilize multipaths low temperature multiple-effect distillation seawater desalination system provided by the invention to improve and can access the concentrated seawater that concentration is higher; Therefore, adopt multipaths low temperature multiple-effect distillation seawater desalination system provided by the invention, improved seawater enrichment factor, improved the utilization ratio of steam energy, reduced the fouling of seawater in each single-effect evaporator shell simultaneously.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (11)
1. a multipaths low temperature multiple-effect distillation seawater desalination system, is characterized in that, comprising:
The condenser being communicated with raw material seawater source;
The evaporation group of connecting with condenser, evaporation group comprises the vaporizer of at least two effect series connection; Wherein, be positioned at one end of evaporation group and the vaporizer that is communicated with condenser inlet mouth is tail vaporizer; Be positioned at vaporizer headed by the vaporizer of the evaporation group the other end;
The steam-pipe being communicated with raw material vapour source and first vaporizer, and be arranged on the heat pump on steam-pipe;
The charging seawater pipeline being communicated with every 1st effective evaporator seawater water inlet and condenser seawater water outlet respectively, be arranged at least one the seawater preheating device on charging seawater pipeline, and be arranged on charging seawater pipeline and the control valve corresponding with every 1st effective evaporator seawater water inlet except first vaporizer;
The product water discharge tube being communicated with every 1st effective evaporator product water water outlet and condenser product water water outlet respectively;
The concentrated seawater discharge tube being communicated with every 1st effective evaporator seawater water outlet respectively, and be arranged on the control valve on each concentrated seawater discharge tube;
Respectively with the charging seawater pipeline at every 1st effective evaporator seawater water inlet place except first vaporizer and the sea water conveying pipelines that concentrated seawater discharge tube is communicated with; And be arranged on two control valves on each sea water conveying pipelines;
The seawater adverse current transport pipe that the seawater water inlet of the vaporizer being connected along tail vaporizer to first vaporizer direction with this single-effect evaporator with every 1st effective evaporator seawater water outlet is respectively communicated with, and be arranged on the control valve on each seawater adverse current transport pipe, and each the seawater adverse current transfer lime except the corresponding seawater adverse current of first vaporizer transport pipe is all connected on the sea water conveying pipelines between two control valves corresponding with it.
2. multipaths low temperature multiple-effect distillation seawater desalination system as claimed in claim 1, is characterized in that, also comprises: be communicated with condenser air outlet, for carrying out degassed vacuum extractor to entering the raw material seawater of condenser.
3. multipaths low temperature multiple-effect distillation seawater desalination system as claimed in claim 1, is characterized in that, vaporizer is tube and shell heat exchanger.
4. multipaths low temperature multiple-effect distillation seawater desalination system as claimed in claim 1, is characterized in that, seawater preheating device is for steaming steam water heat exchanger.
5. multipaths low temperature multiple-effect distillation seawater desalination system as claimed in claim 1, is characterized in that, the inlet mouth of seawater preheating device is communicated with vaporizer, and the product water water outlet of seawater preheating device is communicated with product water discharge tube.
6. multipaths low temperature multiple-effect distillation seawater desalination system as claimed in claim 1, is characterized in that, heat pump is thermo compression injector.
7. multipaths low temperature multiple-effect distillation seawater desalination system as claimed in claim 6, is characterized in that, heat pump is also communicated with the air outlet of tail vaporizer.
8. multipaths low temperature multiple-effect distillation seawater desalination system as claimed in claim 1, is characterized in that, also comprises: the Mare Frigoris water discharge spout road being communicated with condenser seawater water outlet and charging seawater pipeline.
9. the multipaths low temperature multiple-effect distillation seawater desalination system as described in claim 1～8 any one, is characterized in that, also comprises: be arranged on the middle charge pump on each seawater adverse current transport pipe;
Be arranged on the concentrated seawater pump on concentrated seawater discharge tube;
Be arranged on the product water pump on product water discharge tube;
Be arranged on the sea-water pump of the seawater water inlet of condenser;
Be arranged on the pan feeding sea-water pump on charging seawater pipeline;
Be arranged on the cooling sea water pump on Mare Frigoris water discharge spout road.
10. multipaths low temperature multiple-effect distillation seawater desalination system as claimed in claim 9, it is characterized in that, the respectively corresponding fresh water flash tank of each single-effect evaporator and condenser, each fresh water flash tank water-in is communicated with the product water outlet of corresponding vaporizer and condenser, and all fresh water flash tanks are connected by product water discharge tube.
11. multipaths low temperature multiple-effect distillation seawater desalination systems as claimed in claim 10, is characterized in that, the respectively corresponding concentrated seawater flash tank of each single-effect evaporator and condenser, and concentrated seawater flash tank is connected by concentrated seawater discharge tube.
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| CN201310007965.9A CN103073077B (en) | 2013-01-09 | 2013-01-09 | Multi-process, low-temperature and multiple-effect distilled seawater desalination system |
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| CN104860363A (en) * | 2014-02-26 | 2015-08-26 | 上海鸿宝医疗器械有限公司 | Distilled water preparation technology and equipment |
| CN105712423B (en) * | 2016-03-04 | 2018-07-31 | 华北电力大学 | Utilize the MED-TVC seawater desalination combined systems of surplus heat of power plant |
| CN105692750B (en) * | 2016-03-04 | 2018-07-31 | 华北电力大学 | A kind of multiple-effect distillation seawater desalination system using surplus heat of power plant |
| CN112759011A (en) * | 2020-12-31 | 2021-05-07 | 中谷宏(海南)实业有限公司 | Low-temperature evaporation seawater desalination device without vacuum pump |
| CN113880172A (en) * | 2021-09-23 | 2022-01-04 | 华电水务工程有限公司 | Low-temperature multi-effect evaporation seawater desalination energy utilization system and method |
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| JP4984017B2 (en) * | 2005-03-23 | 2012-07-25 | 栗田工業株式会社 | Fresh water generation method |
| CN201325879Y (en) * | 2008-02-29 | 2009-10-14 | 北京博奇电力科技有限公司 | Shell-and-tube heat exchanger type liquid-ammonia evaporator |
| CN201413058Y (en) * | 2009-06-09 | 2010-02-24 | 南京高捷轻工设备有限公司 | Plate-type evaporator |
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