CN1724394A - 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
CN1724394A
CN1724394A CNA2005100428405A CN200510042840A CN1724394A CN 1724394 A CN1724394 A CN 1724394A CN A2005100428405 A CNA2005100428405 A CN A2005100428405A CN 200510042840 A CN200510042840 A CN 200510042840A CN 1724394 A CN1724394 A CN 1724394A
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Prior art keywords
heat
flashing chamber
discharging section
pipeline
flash
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CNA2005100428405A
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CN1302828C (en
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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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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse 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

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  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

A heat return type multi-stage flash evaporation apparatus for desalinating seawater is composed of the circulating saline pipeline in heat releasing segment, mutually communicated several flash evaporation chambers in heat-recovering segment and heat-releasing segment respectively, and the circulating saline pipeline with condensing tube and saline heater in the heat-recovering segment. Their connection scheme is also disclosed.

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 flashing chamber that several pressure reduce gradually, because this moment, environmental stress 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, turndown ratio 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 prolong at the corresponding levels, therefore there is the too high problem of device water generation ratio flash distillation brine concentrations 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 concentrations 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 concentrations 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 water production rate of making because the water generation ratio that the make up water temperature variation 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 flashing chamber and the heat-discharging section flashing chambers that have prolong 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 flashing chamber, the outlet of heat-discharging section circulating brine pipeline is connected with the bottom of heat-discharging section final stage flashing chamber, and the vapour outlet of upper level heat-discharging section flashing chamber is connected with next stage heat-discharging section flashing chamber lower end by pipeline, the flash distillation salt solution of heat-discharging section final stage flashing chamber bottom is connected with the heat-recovery section circulating brine pipeline that is provided with prolong that passes heat-recovery section flashing 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 step flashing chamber bottom of heat-recovery section flashing chamber after the brine heater heating from the circulating brine that heat-recovery section circulating brine pipeline comes out, and the vapour outlet of upper level heat-recovery section flashing chamber is connected with next stage heat-recovery section flashing 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 flashing chamber also is provided with a salt solution residual sea water pump that is connected with the salt solution residual sea water pump; Also be provided with face formula well heater in the lower end flash distillation salt solution of heat-recovery section flashing chamber and heat-discharging section flashing chamber; The lower end of fresh-water tank also is provided with Si Wang Chu Droplets device in heat-recovery section flashing chamber and the heat-discharging section flashing chamber.
The present invention is on the basis of existing multistage flash evaporation seawater desalination system, the part of the secondary steam that flashes off in the flashing chambers at different levels guided to be used for heating flash evaporation salt solution in the next stage flashing chamber, simultaneously replace former seawater as system's make up water with the plant condenser circulating seawer, thereby improve the water generation ratio of system, the flash distillation brine concentrations at different levels of reduction system, and can avoid because the make up water temperature variation causes the shortcoming of water generation ratio decline, thereby the system water production rate 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 flashing chamber of the present invention.
Embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and principle of work 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 flashing chamber 2, and also be respectively arranged with condenser 3 on the circulating brine pipeline 12 in heat-discharging section flashing chamber 2, the outlet of heat-discharging section circulating brine pipeline 12 is connected with the bottom of heat-discharging section final stage flashing chamber 2-1, and the vapour outlet of upper level heat-discharging section flashing chamber 2 is connected with next stage heat-discharging section flashing chamber 2 lower ends by pipeline, the flash distillation salt solution of heat-discharging section final stage flashing chamber 2-1 bottom is connected with the heat-recovery section circulating brine pipeline 13 that is provided with prolong 3-1 that passes heat-recovery section flashing chamber 1 upper end by salt water circulating pump 6, and also be provided with a salt solution residual sea water pump 5 that is connected with the salt solution residual sea water pump in the bottom of heat-discharging section final stage flashing 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 step flashing chamber bottom of heat-recovery section flashing 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 well heater 7 in the lower end flash distillation salt solution of heat-recovery section flashing chamber 1 and heat-discharging section flashing chamber 2, and the vapour outlet of upper level heat-recovery section flashing chamber 1 is connected by the lower end of pipeline with next stage heat-recovery section flashing chamber, and in each heat-recovery section flashing chamber 1 and heat-discharging section flashing 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 flashing 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 heat of condensation discharge section flashing chamber by heat-discharging section circulating brine pipeline 12 through prolong 3, circulating seawer is heated simultaneously, flash-off steam in another part heat-discharging section flashing chamber 2 is introduced in the next stage row discharge section flashing chamber 2 and comes heating flash evaporation salt solution by 7 heat exchange of face formula well heater, and is condensed into product fresh water.Return the sea from the seawater part that heat-discharging section flashing chamber 2 comes out, part is through adding acid, mixing with flash distillation salt solution in the heat-discharging section final stage flashing chamber 2-1 after with foam preventer in addition, send into the heat-recovery section circulating brine pipeline 13 that passes heat-recovery section flashing chamber 1 through salt water circulating pump 6, the a part of steam that flashes off in each heat-recovery section flashing 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 flashing chamber.After circulating brine reclaims the part heat of flash-off steam, enter brine heater 9, further be heated, reach the top temperature of processing requirement, enter heat-recovery section first step flashing chamber bottom then, because its temperature is greater than the temperature of saturation of first step flashing chamber vacuum correspondence at this moment, flash distillation salt solution begins flash distillation, and upwards enter condensing zone after silk screen scum dredger 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 residual sea water 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 secondary steam that flashes off in the flashing chambers at different levels and is used for heating flash evaporation salt solution in the next stage flashing chamber, and according to quality, momentum, principle of conservation of energy, 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 flashing chamber [1] and the heat-discharging section flashing chambers [2] that have prolong [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 flashing chamber [2], the outlet of heat-discharging section circulating brine pipeline [12] is connected with the bottom of heat-discharging section final stage flashing chamber [2-1], and the vapour outlet of upper level heat-discharging section flashing chamber [2] is connected with next stage heat-discharging section flashing chamber [2] lower end by pipeline, the flash distillation salt solution of heat-discharging section final stage flashing chamber [2-1] bottom is connected with the heat-recovery section circulating brine pipeline [13] that is provided with prolong [3-1] that passes heat-recovery section flashing 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 step flashing chamber bottom of heat-recovery section flashing chamber [1] after brine heater [9] heating from the circulating brine that heat-recovery section circulating brine pipeline [13] comes out, and the vapour outlet of upper level heat-recovery section flashing chamber [1] is connected with next stage heat-recovery section flashing chamber [2] 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 flashing chamber [2-1] also is provided with a salt solution residual sea water pump [5] that is connected with the salt solution residual sea water 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 well heater [7] in the lower end flash distillation salt solution of said heat-recovery section flashing chamber [1] and heat-discharging section flashing 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 flashing chamber [1] and the interior fresh-water tank of heat-discharging section flashing 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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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102502902A (en) * 2011-11-10 2012-06-20 集美大学 New multistage flash evaporation seawater desalting system of thermal power plant
CN102580334A (en) * 2012-01-18 2012-07-18 张家港市孚优工程咨询服务有限公司 Flash evaporator
CN103115457A (en) * 2013-02-26 2013-05-22 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
CN103170149A (en) * 2011-12-22 2013-06-26 日立造船株式会社 Multi-effect type evaporation method and multi-effect type evaporation device
CN103304089A (en) * 2013-04-15 2013-09-18 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
CN108147608A (en) * 2018-03-07 2018-06-12 华北电力大学（保定） It is a kind of to utilize compressed air and the multiple-effect evaporation crystal system and method for heat pump treatment of Power brine waste
CN111186950A (en) * 2020-01-13 2020-05-22 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
CN112010380A (en) * 2020-06-19 2020-12-01 北京清建能源技术有限公司 Preparation device and preparation method of hot purified water

Family Cites Families (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
CN1058471C (en) * 1994-12-31 2000-11-15 北京市西城区新开通用试验厂 Solar-energy stepped squential flashing sea-water desalination device
JP3831830B2 (en) * 1998-10-02 2006-10-11 日立造船株式会社 Multistage flash evaporator
CN1158220C (en) * 2001-04-13 2004-07-21 北京瑞勤新技术有限公司 Integrated multistage and multieffect desalination method and its equipment
CN1554589A (en) * 2003-12-26 2004-12-15 国家***天津海水淡化与综合利用研 High efficiency sea water desalination device and method by distillation

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102502902A (en) * 2011-11-10 2012-06-20 集美大学 New multistage flash evaporation seawater desalting system of thermal power plant
CN102502902B (en) * 2011-11-10 2013-07-03 集美大学 New multistage flash evaporation seawater desalting system of thermal power plant
CN103170149A (en) * 2011-12-22 2013-06-26 日立造船株式会社 Multi-effect type evaporation method and multi-effect type evaporation device
CN103170149B (en) * 2011-12-22 2015-12-09 日立造船株式会社 Multiple effectiveness formula method of evaporating and multiple effectiveness formula vaporising device
CN102580334A (en) * 2012-01-18 2012-07-18 张家港市孚优工程咨询服务有限公司 Flash evaporator
CN102580334B (en) * 2012-01-18 2014-08-13 赵云松 Flash evaporator
CN103115457A (en) * 2013-02-26 2013-05-22 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
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
CN103304089A (en) * 2013-04-15 2013-09-18 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
CN108147608A (en) * 2018-03-07 2018-06-12 华北电力大学（保定） It is a kind of to utilize compressed air and the multiple-effect evaporation crystal system and method for heat pump treatment of Power brine waste
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
CN111186950A (en) * 2020-01-13 2020-05-22 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
CN112010380A (en) * 2020-06-19 2020-12-01 北京清建能源技术有限公司 Preparation device and preparation method of hot purified water
CN112010381A (en) * 2020-06-19 2020-12-01 北京清建能源技术有限公司 Device and method for preparing hot distilled water through multistage flash evaporation

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