CN102115221B - Low-temperature multi-effect seawater desalination device capable of achieving on-line water yield adjustment - Google Patents
Low-temperature multi-effect seawater desalination device capable of achieving on-line water yield adjustment Download PDFInfo
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- CN102115221B CN102115221B CN2011100276338A CN201110027633A CN102115221B CN 102115221 B CN102115221 B CN 102115221B CN 2011100276338 A CN2011100276338 A CN 2011100276338A CN 201110027633 A CN201110027633 A CN 201110027633A CN 102115221 B CN102115221 B CN 102115221B
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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
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- Y02A20/124—Water desalination
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Abstract
The invention relates to a low-temperature multi-effect seawater desalination device capable of achieving the effect of on-line water yield adjustment, which comprises a steam system, a main body system, a condensed water system, a material seawater system, an evacuation system, a concentrated seawater system and a finished water system, wherein the steam system comprises a heating steam supply device (1), a heating steam flow control valve (2), a first-stage spray-type desuperheater (3), a steam jet compressor (4) and a second-stage spray-type desuperheater (5); the main body system comprises a multi-effect evaporation/condensation device (6); the condensed water system comprises a condensed water pump (7), a desuperheating water pump (8) and a condensed water collecting device (9); the material seawater system comprises a material seawater supply device (10) and a material water pump (11); the evacuation system comprises an evacuation device (12); the concentrated seawater system comprises a concentrated seawater pump (13) and a concentrated seawater treatment device (15); and the finished water system comprises a finished water pump (14) and a finished water collecting device (16). The low-temperature multi-effect seawater desalination device achieves the function of on-line water yield adjustment and has low cost and high reliability.
Description
Technical field
The present invention relates to a kind of sea water distiling plant.Belong to sea water distiling plant process control technology field.
Background technology
Sea water desaltination is the process with salt in the seawater and water sepn, realizes through physics, chemistry or physico-chemical process, claims sea water desalinization again.The used former water of sea water desaltination mainly is seawater, also has brackish water etc. in addition, and its technological kind is a lot, but form industry size mainly contain reverse osmosis method and distillation method.Distillation method utilizes heat energy that seawater is converted into high-quality fresh water, and it is divided into low-temperature multi-effect, MSF and three kinds of major techniques of pressure steam distillation again.Low temperature multiple-effect distillation technology (LT-MED); The temperature control of concentrated seawater top is in 65～70 ℃ of scopes; Make the outer fouling of heat-transfer pipe reduce greatly; Having overcome the serious problem of early stage multi-effect distilling fouling, made multi-effect distilling recover mainstream technology status in the sea water desaltination field, is one of method for saving energy in the distillation method.
Low-temperature multiple-effect seawater desalination evaporator becomes the evaporation and the condensation process of a plurality of evaporator series operations according to process parameters design such as water production rate, water generation ratios.External heating steam is through getting into behind the steam-jet ejector in the first evaporator heat transfer tube; The material seawater gets into vaporizer through spray equipment from the vaporizer top; Then get into the tube bank zone; Steam in the heat transfer tube is with the heating of material seawater, and the secondary steam that the material seawater is produced by thermal evaporation gets into 1st effective evaporator down, and heating steam is discharged separately through condensing into water after the heat exchange.The first outer secondary steam that produces of heat-transfer pipe of imitating gets into 1st effective evaporator down; Heating steam as next effect; Spray material seawater to next effect heats, and the distillation back produces new steam and gets into the back single-effect evaporator, and obtains desalination water after the steam condensation simultaneously from preceding effect.By that analogy, by imitating spray material water is added thermal distillation.In last evaporator, add steam that thermal distillation produces and get into condenser and be condensed into desalination water, all desalination waters through pipe finally from the last evaporator discharger.Each effect material seawater passes through connecting pipe through the concentrated seawater that the distillation back forms, and gets into 1st effective evaporator down successively, finally discharges from last evaporator.
The water production rate of sea water distiling plant is an output of distill water, is meant finished product aquatic products amount and the condensed water output sum removed behind the heating steam consumption, can be by following formula calculating:
Water production rate=finished product aquatic products amount+condensed water output-heating steam consumption.
In practical engineering application, user's water load is constantly to change, and particularly when winter and summer, demand changes greatly.Adopt the different many Taiwan Straits water desalination apparatus of water production rate; Cost is high; Plant factor is low, and the storage of product water need take a large amount of spaces, and this just need carry out necessary adjusting to water production rate; Make in the water production rate certain limit according to water load respective change, rationally adjust the desalination system operating parameter easily and promptly regulate generation and just become the key subject in sea water desaltination field.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, a kind of online regulatory function of water production rate that has is provided, and low-temperature multi-effect seawater desalination device with low cost, that safety is high.
The objective of the invention is to realize like this: a kind of low-temperature multi-effect seawater desalination device that can online adjusting water production rate; Said device comprises: steam system, main body system, condensate system, material sea water system, pumped vacuum systems, concentrated seawater system and finished product water system; Said steam system comprises heating steam feeding mechanism, heating steam regulating valve, one-level direct-contact desuperheater, steam-jet ejector and secondary direct-contact desuperheater; Main body system comprises multiple-effect evaporation/condensing surface; Condensate system comprises condensate pump, desuperheat water pump and condensed water collection device, and the material sea water system comprises material seawater generator and material water pump, and pumped vacuum systems comprises vacuum extractor; The concentrated seawater system comprises concentrated seawater pump and concentrated seawater treatment unit, and the finished product water system comprises finished product water pump and finished product water collecting device; The vapour outlet of said heating steam feeding mechanism links to each other through the steam inlet of heating steam regulating valve with the one-level direct-contact desuperheater; The vapour outlet of one-level direct-contact desuperheater links to each other with the power steam import of steam-jet ejector, and the vapour outlet of steam-jet ejector links to each other with secondary direct-contact desuperheater steam inlet; Secondary direct-contact desuperheater vapour outlet links to each other with the first evaporator steam inlet of multiple-effect evaporation/condensing surface; The head of multiple-effect evaporation/condensing surface is imitated the condensed water outlet and is linked to each other with the condensate pump import; The condensate pump outlet inserts the import of secondary direct-contact desuperheater desuperheating water, desuperheating water pump inlet and condensed water collection device respectively, and the desuperheating water pump discharge links to each other with the desuperheating water import of one-level direct-contact desuperheater; The part secondary steam of certain single-effect evaporator gets into the jetting steam caused import of steam-jet ejector in multiple-effect evaporation/condensing surface; Material seawater generator links to each other with the material sea intake of multiple-effect evaporation/condensing surface through the material water pump; The noncondensable gas pipeline of taking out of multiple-effect evaporation/condensing surface links to each other with vacuum extractor; The concentrated seawater of multiple-effect evaporation/condensing surface links to each other with the concentrated seawater treatment unit through the concentrated seawater pump; The last evaporator finished product water of multiple-effect evaporation/condensing surface links to each other with the finished product water collecting device through the finished product water pump.
The invention has the beneficial effects as follows:
The present invention can make the water production rate of low-temperature multi-effect seawater desalination device in 40～100% scopes of its rated output, regulate as required, also allows device in a short time to exert oneself to be 110% sh production in addition.And with low cost, safety is high.
Description of drawings
Fig. 1 for the present invention can online adjusting water production rate the low-temperature multi-effect seawater desalination device synoptic diagram.
Reference numeral among the figure:
Heating steam feeding mechanism 1, heating steam regulating valve 2, one-level direct-contact desuperheater 3, steam-jet ejector 4, secondary direct-contact desuperheater 5, multiple-effect evaporation/condensing surface 6, condensate pump 7, desuperheat water pump 8, condensed water collection device 9, material seawater generator 10, material water pump 11, vacuum extractor 12, concentrated seawater pump 13, finished product water pump 14, concentrated seawater treatment unit 15, finished product water collecting device 16.
Embodiment
Referring to Fig. 1, the low-temperature multi-effect seawater desalination device synoptic diagram that the present invention can online adjusting water production rate.Can find out by Fig. 1, the present invention includes: the steam system of forming by heating steam feeding mechanism 1, heating steam regulating valve 2, one-level direct-contact desuperheater 3, steam-jet ejector 4, secondary direct-contact desuperheater 5 and front and back connecting pipeline, valve and system etc.; The main body system of forming by multiple-effect evaporation/condensing surface 6 and front and back connecting pipeline, system etc.; The condensate system of forming by condensate pump 7, desuperheat water pump 8, condensed water collection device 9 and front and back connecting pipeline, valve and system etc.; The material sea water system of forming by material seawater generator 10, material water pump 11 and front and back connecting pipeline, valve and system etc.; The pumped vacuum systems of forming by vacuum extractor 12 and front and back connecting pipeline, valve and system etc.; The concentrated seawater system that forms by concentrated seawater pump 13, concentrated seawater treatment unit 15 and front and back connecting pipeline, valve and system etc.; And form by the finished product water system that finished product water pump 14, finished product water collecting device 16 and front and back connecting pipeline, valve and system etc. are formed.
The vapour outlet of said heating steam feeding mechanism 1 links to each other through the steam inlet of heating steam regulating valve 2 with one-level direct-contact desuperheater 3; The vapour outlet of one-level direct-contact desuperheater 3 links to each other with the power steam import of steam-jet ejector 4, and the vapour outlet of steam-jet ejector 4 links to each other with secondary direct-contact desuperheater 5 steam inlets; Secondary direct-contact desuperheater 5 vapour outlets link to each other with the first evaporator steam inlet of multiple-effect evaporation/condensing surface 6; The head of multiple-effect evaporation/condensing surface 6 is imitated the condensed water outlet and is linked to each other with condensate pump 7 imports; Condensate pump 7 outlets insert the 5 desuperheating water imports of secondary direct-contact desuperheater, 8 imports of desuperheat water pump and condensed water collection device 9 respectively, and 8 outlets of desuperheat water pump link to each other with the desuperheating water import of one-level direct-contact desuperheater 3; The part secondary steam of certain single-effect evaporator gets into steam-jet ejector 4 jetting steam caused imports in multiple-effect evaporation/condensing surface 6; Material seawater generator 10 links to each other with the material sea intake of multiple-effect evaporation/condensing surface 6 through material water pump 11; The noncondensable gas pipeline of taking out of multiple-effect evaporation/condensing surface 6 links to each other with vacuum extractor 12; The concentrated seawater of multiple-effect evaporation/condensing surface 6 links to each other with concentrated seawater treatment unit 15 through concentrated seawater pump 13; The last evaporator finished product water of multiple-effect evaporation/condensing surface 6 links to each other with finished product water collecting device 16 through finished product water pump 14.
During startup, drop into material seawater generator 10, material water pump 11, concentrated seawater pump 13 and concentrated seawater treatment unit 15 earlier and set up the cold conditions circulation; Drop into vacuum extractor 12 and desuperheat water pump 8 (adopting external moisturizing when not having condensed water) again, when vacuum reaches operating requirement, drop into heating steam feeding mechanism 1, condensate pump 7 and condensed water collection device 9, and close external moisturizing; , drops in finished product water finished product water pump 14 and finished product water collecting device 16 when reaching certain output; After the sea water distiling plant operation is normal, can slowly regulate heating steam regulating valve 2, realize the online adjusting of water production rate according to the water production rate needs.
Above scheme is applicable to the low-temperature multi-effect seawater desalination device that all need online adjusting water production rate.
Claims (1)
- One kind can online adjusting water production rate low-temperature multi-effect seawater desalination device; It is characterized in that: said device comprises: steam system, main body system, condensate system, material sea water system, pumped vacuum systems, concentrated seawater system and finished product water system; Said steam system comprises heating steam feeding mechanism (1), heating steam regulating valve (2), one-level direct-contact desuperheater (3), steam-jet ejector (4) and secondary direct-contact desuperheater (5); Main body system comprises multiple-effect evaporation/condensing surface (6); Condensate system comprises condensate pump (7), desuperheat water pump (8) and condensed water collection device (9); The material sea water system comprises material seawater generator (10) and material water pump (11); Pumped vacuum systems comprises vacuum extractor (12), and the concentrated seawater system comprises concentrated seawater pump (13) and concentrated seawater treatment unit (15), and the finished product water system comprises finished product water pump (14) and finished product water collecting device (16); The vapour outlet of said heating steam feeding mechanism (1) links to each other through the steam inlet of heating steam regulating valve (2) with one-level direct-contact desuperheater (3); The vapour outlet of one-level direct-contact desuperheater (3) links to each other with the power steam import of steam-jet ejector (4), and the vapour outlet of steam-jet ejector (4) links to each other with secondary direct-contact desuperheater (5) steam inlet; Secondary direct-contact desuperheater (5) vapour outlet links to each other with the first evaporator steam inlet of multiple-effect evaporation/condensing surface (6); The head of multiple-effect evaporation/condensing surface (6) is imitated the condensed water outlet and is linked to each other with condensate pump (7) import; Condensate pump (7) outlet inserts secondary direct-contact desuperheater (5) desuperheating water import, (8) import of desuperheat water pump and condensed water collection device (9) respectively, and desuperheat water pump (8) outlet links to each other with the desuperheating water import of one-level direct-contact desuperheater (3); The part secondary steam of certain single-effect evaporator gets into the jetting steam caused import of steam-jet ejector (4) in multiple-effect evaporation/condensing surface (6); Material seawater generator (10) links to each other with the material sea intake of multiple-effect evaporation/condensing surface (6) through material water pump (11); The noncondensable gas pipeline of taking out of multiple-effect evaporation/condensing surface (6) links to each other with vacuum extractor (12); The concentrated seawater of multiple-effect evaporation/condensing surface (6) links to each other with concentrated seawater treatment unit (15) through concentrated seawater pump (13); The last evaporator finished product water of multiple-effect evaporation/condensing surface (6) links to each other with finished product water collecting device (16) through finished product water pump (14).
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| CN2011100276338A CN102115221B (en) | 2011-01-26 | 2011-01-26 | Low-temperature multi-effect seawater desalination device capable of achieving on-line water yield adjustment |
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| CN2011100276338A CN102115221B (en) | 2011-01-26 | 2011-01-26 | Low-temperature multi-effect seawater desalination device capable of achieving on-line water yield adjustment |
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| CN102115221B true CN102115221B (en) | 2012-07-25 |
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| CN116395898B (en) * | 2023-04-28 | 2024-01-16 | 青岛华丰伟业电力科技工程有限公司 | Automatic start-stop control system of sea water desalination plant |
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| CN201952319U (en) * | 2011-01-26 | 2011-08-31 | 双良节能系统股份有限公司 | Low-temperature multiple-effect seawater desalination device with online adjustable water yield |
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