CN1302828C - Apparatus for heat recoverin multigrade flash desalting of sea water - Google Patents

Apparatus for heat recoverin multigrade flash desalting of sea water Download PDF

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Publication number
CN1302828C
CN1302828C CNB2005100428405A CN200510042840A CN1302828C CN 1302828 C CN1302828 C CN 1302828C CN B2005100428405 A CNB2005100428405 A CN B2005100428405A CN 200510042840 A CN200510042840 A CN 200510042840A CN 1302828 C CN1302828 C CN 1302828C
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China
Prior art keywords
heat
flash
flash chamber
section
recovery section
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Expired - Fee Related
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CNB2005100428405A
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Chinese (zh)
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CN1724394A (en
Inventor
严俊杰
王金华
邵树峰
刘继平
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Xian Jiaotong University
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Xian Jiaotong University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The present invention relates to a heat return type multi-stage flash evaporation sea water desalination device which comprises a circulating salt water pipeline at a heat discharge section and a plurality of sets of flash chambers at a heat recovery section and flash chambers which are at the heat discharge section and are communicated with each other, wherein the circulating salt water pipeline at the heat discharge section penetrates through the upper ends of the flash chambers at the heat discharge section, and an outlet of the circulating salt water pipeline at the heat discharge section is communicated with the bottom end of the final stage of flash chamber at the heat discharge section; a steam outlet of the previous stage of the flash chamber at the heat discharge section is communicated with the lower end of next stage of flash chamber at the heat discharge section. Flash salt water in the bottom part of the final stage of flash chamber at the heat discharge section is communicated with a circulating salt water pipeline which is at the heat recovery section and penetrates the upper ends of the flash chambers at the heat recovery section and is provided with a condensing pipe; the circulating salt water pipeline at the heat recovery section is also provided with a salt water heater, circulating salt water flowing out of the circulating salt water pipeline at the heat recovery section is communicated with the lower part of the first stage of flash chamber of the flash chambers at the heat recovery section after heated by the salt water heater, and a steam outlet of the previous flash chamber at the heat recovery section is communicated with the lower end of the next stage of flash chamber at the heat recovery section by a pipeline.

Description

Apparatus for heat recoverin multigrade flash desalting of sea water
Technical field
The invention belongs to the processing technology field of water, waste water, sewage or mud, be specifically related to the apparatus for heat recoverin multigrade flash desalting of sea water that a kind of heat energy is repeatedly recycled.
Background technology
The multistage flash evaporation seawater desalination system is hot salt brine is flowed through successively a flash chamber that several pressure reduce gradually, because this moment, environmental pressure was lower than the pairing saturated vapor pressure of temperature of hot salt brine, hot salt brine part vaporization hastily produces steam, becomes fresh water through condensation.It has equipment simple and reliable, be easy to maximize, operating flexibility is big and can utilize advantages such as Lowlevel thermal energy and used heat, be with a wide range of applications.Because the latent heat that flash-off steam discharges all is used for heating the circulating brine in the condenser pipe at the corresponding levels, therefore there is the too high problem of device water generation ratio flash distillation brine strengths less than normal and at different levels in existing multistage flash evaporation seawater desalination system but in actual applications.The device water generation ratio is less than normal, with the heat-economy of impair system; Flash distillation brine strengths at different levels are too high, with the corrosion and the fouling of aggravation system, influence the security of system's operation.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of water generation ratio that can improve system is provided, the flash distillation brine strengths at different levels of reduction system, and can avoiding, thereby stable more, the reliable apparatus for heat recoverin multigrade flash desalting of sea water of the system aquifer yield of making because the water generation ratio that the supplementing water variations in temperature causes descends.
For achieving the above object, the technical solution used in the present invention is: comprise heat-discharging section circulating brine pipeline, and some groups of heat-recovery section flash chamber and the heat-discharging section flash chambers that have condenser pipe and fresh-water tank that are interconnected, be characterized in, heat-discharging section circulating brine pipeline is connected with condenser and passes from the upper end of heat-discharging section flash chamber, the outlet of heat-discharging section circulating brine pipeline is connected with the bottom of heat-discharging section final stage flash chamber, and the steam (vapor) outlet of upper level heat-discharging section flash chamber is connected with next stage heat-discharging section flash chamber lower end by pipeline, the flash distillation salt solution of heat-discharging section final stage flash chamber bottom is connected with the heat-recovery section circulating brine pipeline that is provided with condenser pipe that passes heat-recovery section flash chamber upper end by salt water circulating pump, also be provided with brine heater on the pipeline of heat-recovery section circulating brine pipeline, be connected with the first order flash chamber bottom of heat-recovery section flash chamber after the brine heater heating from the circulating brine that heat-recovery section circulating brine pipeline comes out, and the steam (vapor) outlet of upper level heat-recovery section flash chamber is connected with next stage heat-recovery section flash chamber lower end by pipeline.
Another characteristics of the present invention are: the exit of fresh-water tank also is provided with the product water pump; The bottom of heat-discharging section final stage flash chamber also is provided with a salt solution dredge pump that is connected with the salt solution dredge pump; Also be provided with face formula heater in the lower end flash distillation salt solution of heat-recovery section flash chamber and heat-discharging section flash chamber; The lower end of fresh-water tank also is provided with Si Wang Chu Droplets device in heat-recovery section flash chamber and the heat-discharging section flash chamber.
The present invention is on the basis of existing multistage flash evaporation seawater desalination system, the part of the indirect steam that flashes off in the flash chambers at different levels guided to be used for heating flash evaporation salt solution in the next stage flash chamber, simultaneously replace former seawater as system's supplementing water with the plant condenser circulating seawer, thereby improve the water generation ratio of system, the flash distillation brine strengths at different levels of reduction system, and can avoid because the supplementing water variations in temperature causes the shortcoming of water generation ratio decline, thereby the system aquifer yield of making is stable more, reliable.
Description of drawings
Fig. 1 is a system schematic of the present invention;
Fig. 2 is the structural representation of flash chamber of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are described in further detail.
Referring to Fig. 1,2, the present invention includes the heat-discharging section circulating brine pipeline 12 that inlet is connected with condenser 11, heat-discharging section circulating brine pipeline 12 passes from the upper end of heat-discharging section flash chamber 2, and also be respectively arranged with condenser 3 on the circulating brine pipeline 12 in heat-discharging section flash chamber 2, the outlet of heat-discharging section circulating brine pipeline 12 is connected with the bottom of heat-discharging section final stage flash chamber 2-1, and the steam (vapor) outlet of upper level heat-discharging section flash chamber 2 is connected with next stage heat-discharging section flash chamber 2 lower ends by pipeline, the flash distillation salt solution of heat-discharging section final stage flash chamber 2-1 bottom is connected with the heat-recovery section circulating brine pipeline 13 that is provided with condenser pipe 3-1 that passes heat-recovery section flash chamber 1 upper end by salt water circulating pump 6, and also be provided with a salt solution dredge pump 5 that is connected with the salt solution dredge pump in the bottom of heat-discharging section final stage flash chamber 2-1, also be provided with brine heater 9 on the export pipeline of heat-recovery section circulating brine pipeline 13, be connected with the first order flash chamber bottom of heat-recovery section flash chamber 1 after brine heater 9 heating from the circulating brine that heat-recovery section circulating brine pipeline 13 comes out, also be provided with face formula heater 7 in the lower end flash distillation salt solution of heat-recovery section flash chamber 1 and heat-discharging section flash chamber 2, and the steam (vapor) outlet of upper level heat-recovery section flash chamber 1 is connected by the lower end of pipeline with next stage heat-recovery section flash chamber, and in each heat-recovery section flash chamber 1 and heat-discharging section flash chamber 2, also be provided with the fresh-water tank 10 that is connected with product water pump 4, also be provided with wire mesh demister 8 in the lower end of fresh-water tank 10.
At heat-discharging section flash chamber 2, the circulating seawer of heat supply unit condenser 11 at first is used for a part of flash-off steam of 2 li generations of condensation heat discharge section flash chamber by heat-discharging section circulating brine pipeline 12 through condenser pipe 3, circulating seawer is heated simultaneously, flash-off steam in another part heat-discharging section flash chamber 2 is introduced in the next stage heat-discharging section flash chamber 2 and comes heating flash evaporation salt solution by 7 heat exchange of face formula heater, and is condensed into product fresh water.Return the sea from the seawater part that heat-discharging section flash chamber 2 comes out, part is through adding acid, mixing with flash distillation salt solution in the heat-discharging section final stage flash chamber 2-1 after with antifoaming agent in addition, send into the heat-recovery section circulating brine pipeline 13 that passes heat-recovery section flash chamber 1 through salt water circulating pump 6, the a part of steam that flashes off in each heat-recovery section flash chamber 1 of condensation successively, equally, another part flash-off steam is introduced to through pipeline and is used for heating flash evaporation salt solution in the next stage flash chamber.After circulating brine reclaims the part heat of flash-off steam, enter brine heater 9, further be heated, reach the maximum temperature of technological requirement, enter heat-recovery section first order flash chamber bottom then, because its temperature is greater than the saturation temperature of first order flash chamber vacuum correspondence at this moment, flash distillation salt solution begins flash distillation, and upwards enter condensing zone after silk screen demister 8 is removed salt water droplet and foam is condensed into product fresh water to the steam that flashes off.Repeat said process later on step by step to the last level, a part of flash distillation salt solution is by 5 dischargings of salt solution dredge pump, and product fresh water is sent into the product water tank by product water pump 4.
The present invention guides to the part of the indirect steam that flashes off in the flash chambers at different levels and is used for heating flash evaporation salt solution in the next stage flash chamber, and according to quality, momentum, conservation of energy principle, the water generation ratio of device obviously increases.

Claims (5)

1, apparatus for heat recoverin multigrade flash desalting of sea water, comprise heat-discharging section circulating brine pipeline [12], and some groups of heat-recovery section flash chamber [1] and the heat-discharging section flash chambers [2] that have condenser pipe [3] and fresh-water tank [10] that are interconnected, it is characterized in that: heat-discharging section circulating brine pipeline [12] is connected with condenser [11] and passes from the upper end of heat-discharging section flash chamber [2], the outlet of heat-discharging section circulating brine pipeline [12] is connected with the bottom of heat-discharging section final stage flash chamber [2-1], and the steam (vapor) outlet of upper level heat-discharging section flash chamber [2] is connected with next stage heat-discharging section flash chamber [2] lower end by pipeline, the flash distillation salt solution of heat-discharging section final stage flash chamber [2-1] bottom is connected with the heat-recovery section circulating brine pipeline [13] that is provided with condenser pipe [3-1] that passes heat-recovery section flash chamber [1] upper end by salt water circulating pump [6], also be provided with brine heater [9] on the pipeline of heat-recovery section circulating brine pipeline [13], be connected with the first order flash chamber bottom of heat-recovery section flash chamber [1] after brine heater [9] heating from the circulating brine that heat-recovery section circulating brine pipeline [13] comes out, and the steam (vapor) outlet of upper level heat-recovery section flash chamber [1] is connected with next stage heat-recovery section flash chamber [1] lower end by pipeline.
2, apparatus for heat recoverin multigrade flash desalting of sea water according to claim 1 is characterized in that: the exit of said fresh-water tank [10] also is provided with product water pump [4].
3, apparatus for heat recoverin multigrade flash desalting of sea water according to claim 1 is characterized in that: the bottom of said heat-discharging section final stage flash chamber [2-1] also is provided with a salt solution dredge pump [5] that is connected with the salt solution dredge pump.
4, apparatus for heat recoverin multigrade flash desalting of sea water according to claim 1 is characterized in that: also be provided with face formula heater [7] in the lower end flash distillation salt solution of said heat-recovery section flash chamber [1] and heat-discharging section flash chamber [2].
5, apparatus for heat recoverin multigrade flash desalting of sea water according to claim 1 is characterized in that: the lower end of said heat-recovery section flash chamber [1] and the interior fresh-water tank of heat-discharging section flash chamber [2] [10] also is provided with Si Wang Chu Droplets device [8].
CNB2005100428405A 2005-06-23 2005-06-23 Apparatus for heat recoverin multigrade flash desalting of sea water Expired - Fee Related CN1302828C (en)

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CN102502902B (en) * 2011-11-10 2013-07-03 集美大学 New multistage flash evaporation seawater desalting system of thermal power plant
JP5804931B2 (en) * 2011-12-22 2015-11-04 日立造船株式会社 Multi-effect evaporation method and multi-effect evaporation apparatus
CN102580334B (en) * 2012-01-18 2014-08-13 赵云松 Flash evaporator
CN103115457B (en) * 2013-02-26 2015-05-20 集美大学 Cooling, heating, water supplying and power supplying combined system with flue gas heat gradient utilization function coupled with seawater desalination technology
CN103304089B (en) * 2013-04-15 2014-11-19 浙江大学 Multistage flash evaporation seawater desalting device with multiple-effect heat utilization
CN104089276A (en) * 2014-06-24 2014-10-08 首钢京唐钢铁联合有限责任公司 Multi-stage flash treatment system utilizing exhaust gas and circulating cooling water
CN105776391A (en) * 2016-05-18 2016-07-20 桑夏太阳能股份有限公司 Solar-powered seawater desalination device
CN106348372A (en) * 2016-09-22 2017-01-25 侴乔力 Multistage flash evaporation process independently driven by recycled heat of steam condensation source heat pump
CN108147608B (en) * 2018-03-07 2023-10-13 华北电力大学(保定) Multi-effect evaporation crystallization system and method for treating power plant brine wastewater by using compressed air and heat pump
CN111186950B (en) * 2020-01-13 2020-12-08 西安交通大学 High-yield seawater desalination system and operation method
CN111559770A (en) * 2020-05-08 2020-08-21 李方 Heat pipe type seawater desalination device
CN112010380B (en) * 2020-06-19 2023-12-01 北京清建能源技术有限公司 Preparation device and preparation method of hot purified water

Citations (5)

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CN87214093U (en) * 1987-10-05 1988-08-17 大连工学院 Multiple-stage flash tower type multiple-effect evaporator
CN1125692A (en) * 1994-12-31 1996-07-03 北京市西城区新开通用试验厂 Solar-energy stepped squential flashing sea-water desalination device
JP2000107502A (en) * 1998-10-02 2000-04-18 Hitachi Zosen Corp Multistage flash evaporator
CN1380257A (en) * 2001-04-13 2002-11-20 北京华瑞投资管理有限公司 Integrated multistage and multieffect desalination method and its equipment
CN1554589A (en) * 2003-12-26 2004-12-15 国家海洋局天津海水淡化与综合利用研 High efficiency sea water desalination device and method by distillation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87214093U (en) * 1987-10-05 1988-08-17 大连工学院 Multiple-stage flash tower type multiple-effect evaporator
CN1125692A (en) * 1994-12-31 1996-07-03 北京市西城区新开通用试验厂 Solar-energy stepped squential flashing sea-water desalination device
JP2000107502A (en) * 1998-10-02 2000-04-18 Hitachi Zosen Corp Multistage flash evaporator
CN1380257A (en) * 2001-04-13 2002-11-20 北京华瑞投资管理有限公司 Integrated multistage and multieffect desalination method and its equipment
CN1554589A (en) * 2003-12-26 2004-12-15 国家海洋局天津海水淡化与综合利用研 High efficiency sea water desalination device and method by distillation

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