CN101130442A - Method for desalinating sea water by using seawater source heat pump technology - Google Patents
Method for desalinating sea water by using seawater source heat pump technology Download PDFInfo
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- CN101130442A CN101130442A CNA2006101211378A CN200610121137A CN101130442A CN 101130442 A CN101130442 A CN 101130442A CN A2006101211378 A CNA2006101211378 A CN A2006101211378A CN 200610121137 A CN200610121137 A CN 200610121137A CN 101130442 A CN101130442 A CN 101130442A
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- sea water
- heat pump
- source heat
- seawater
- water source
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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
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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Abstract
The invention discloses a desalinating technique of seawater through water source heat pump under negative pressure condition, wherein the system is composed of seawater source heat pump, jet vacuum pump, generator and pump; a lower pressure condition is formed in the generator to evaporate the seawater with temperature elevated; the steam is leaded into next generator acted by jet vacuum pump to release potential heat and evaporate seawater, which realizes the utilization effectively; the steam condensate is extracted from the generator to product fresh water. The invention improves the energy utilizing efficiency as heat supplying equipment in winter, which releases the heat pollution of circulating condensate of electric factory due to low temperature of outlet water of seawater source heat pump evaporator and system generator.
Description
Affiliated technical field
The present invention is that a kind of employing circulating cooling water of power plant is as raw material and the thermal source of desalinizing seawater, utilize the sea water source heat pump technology in circulating cooling water of power plant, to extract heat at non-heating season (can heat to buildings) at heating season, the heat that utilization extracts, the method for sending out of carrying out the low-temperature multi-effect sea water by distillation after the circulating cooling water of power plant temperature increase with the part original state.
Background technology
Along with quick, the steady development of Chinese national economy, the situation of domestic shortage of fresh water presents severe situation, and the problem of shortage of fresh water has become the restraining factors of many coastlands rapid economic development.
At present, the sea water desaltination engineering has been set about greatly developing by government in the coastland.
Distillation method, reverse osmosis method and electroosmose process etc. are arranged in the method for sea water desaltination.The distillation type method for desalting seawater of widespread use at present mainly by combustion of fossil fuels, obtains the material heating nature seawater (or power plant's vapour cycle refrigerated sea water) based on the high calorie of steam, carries out sea water desaltination.It is big that this method consumes the primary energy source amount, and efficient not high (thermo-efficiency of boiler is 45.1%), and the energy consumption of preparation fresh water is higher relatively.
The engineering of utilizing sea water source heat pump technology preparation to desalinize seawater is also arranged, as be published in " process water and waste water " the 5th phase in 2003 " heat-pump-type naval vessel sea water desalinating plant ".
The ingenious heat pump techniques that utilized of this design obtains the utilization that moves in circles of energy by less energy supplement, but should design exist significantly not enough:
One, the latent heat of utilization evaporation gained steam not yet in effect, this steam can be as the evaporation of seawater thermal source of next effect.
Two, do not utilize the heat of boats and ships used heat material to heat the temperature that desalinizes seawater and expect, can have the heat supplement deficiency for low temperature seawater, the variation of envrionment temperature can make system's fluctuation of service, even can cause system throughput seriously to descend.
Three, adopt surface evaporation, do not utilize water ebullient physical property under low pressure, can't make full use of the compensation heat of heat pump.Velocity of evaporation is slow, and fresh water yield is low.
Four, heat utilization ratio is low in the system, and loop cycle is short, and the heat pump power consumption is big.
Overall efficiency based on above this sea water desalinating plant of reason is not high.
Summary of the invention
The desalinize seawater key of technology of evaporation is the Mi Yuan of the energy that operates and how improves the transformation efficiency of energy, and heat pump has obtained approval in society's circle scope as high-efficiency energy-saving technology, and has presented the trend that develops of popularizing.
Content of the present invention is: use the thermal source of part circulating cooling water of power plant as heat pump set, simultaneously on the temperature of original electric power plant circulating water, by the compression working medium in the heat pump set transfer of heat of extracting is arrived in it, can obtain the material that desalinizes seawater of comparatively high temps, can in bigger pressure range, realize the explosive evaporatoin of seawater, effectively improve the efficient of sea water desaltination.
The technical solution adopted in the present invention is: system is made up of sea water source heat pump unit, multiple-effect producer and jet vacuum pump etc.Operating pressure in the producer is controlled by jet vacuum pump.The seawater that system uses is divided into two portions, emits after the thermal source cooling of a part as sea water source heat pump; A part enters in the sea water source heat pump unit through after improving temperature as the material that desalinizes seawater, enter the multiple-effect producer, flowing into next in producer after the evaporation imitates in the producer, so being staged flows, the feed liquid seawater is through repeatedly evaporation, and the form with concentrated solution in the final producer is endways discharged system.After the material that desalinizes seawater evaporates, the steam that produces enters next by vapour pipe taking out of jet vacuum pump under the effect of drawing and imitates in the producer, in the condenser in this producer, vapor condensation discharges gasification latent heat and adds the interior seawater of heat(ing)generator, the evaporation that under the boiling pressure of correspondence, comes to life of producer maritime interior waters, constantly repeat this process, until system's end.Phlegma is taken out extraction system through jet vacuum pump behind the vapor condensation in every effect producer, and the producer internal pressure is in the working range all the time, has guaranteed the continuous operation of system.
The invention has the beneficial effects as follows: the circulating cooling water of power plant that utilizes temperature-stable will improve the working efficiency of heat pump to a great extent as thermal source; Utilize circulating cooling water of power plant as the material that desalinizes seawater, the heat that only needs to add a part on original temperature will obtain higher temperature, has also effectively utilized original heat in power plant's circulation refrigerated sea water simultaneously; The consumption energy is few, and the energy utilization coefficient of sea water source heat pump is
COA＝1+COP
The generating efficiency η of power plant
eBetween 0.35～0.41, the thermo-efficiency of boiler is about 0.45, and the COP of sea water source heat pump is 4～5.For obtaining equal heat, the efficiency far of sea water source heat pump reduces energy wastage to a great extent greater than other heat-supplying mode; System operation mode is flexible, and Various Seasonal can be adjusted the production run pattern, and winter, the sea water source heat pump unit can heat to buildings as heating plant; The water outlet of sea water source heat pump evaporator end and system's producer leaving water temperature(LWT) are all lower, can alleviate the thermal pollution of circulating cooling water of power plant to environment, and system efficiency is higher.
Embodiment:
Fig. 1 is a schematic diagram of the present invention.
Among Fig. 1,1. power plant steam turbine condenser circulation refrigerated sea water, 2. condenser, 3. compressor, 4. vaporizer, 5. water reservoir, 6. high-pressure hydraulic pump, 7. jet vacuum pump, 8. phlegma recovery tube, 9. condenser, 10. water pump, 11. vapor recovery pipes, 12. producers, 13. the sea water source heat pump unit, 14. building heating pipeline switching valves.
Among Fig. 1, power plant steam turbine condenser circulation refrigerated sea water (1) divides two-way, and one the tunnel enters the condenser (2) of sea water source heat pump unit (13), and one the tunnel enters the vaporizer (4) of sea water source heat pump; By compressor (3) acting will enter heat that the seawater of vaporizer (4) contains by working medium in the compressor phase transformation propose, transfer to the seawater temperature that will enter in the condenser (2) wherein and promote; Seawater after the temperature increase enters producer (12).High-pressure hydraulic pump (6) utilizes the high pressure water of the water generates in the water reservoir (5) to drive jet vacuum pump (7), the mode of connection of jet vacuum pump and all producer is for being connected in parallel, pressure under its effect in the producer drops under certain evaporating pressure value, seawater after this moment being heated in the producer comes to life, the steam that produces enters the vapour generator of next effect through vapor recovery pipe (11), will discharge latent heat evaporation seawater in the seawater in next imitates producer.Condensed steam is collected by phlegma recovery tube (8), takes phlegma out of desalination system by the effect of jet vacuum pump (7) and enters water reservoir (5); The steam that produces in the producer under the effect of jet vacuum pump (7) then enters next effect, constantly finish the process of evaporative condenser, imitate the steam deficiency that produces or lose utility value until end, attracted system by jet vacuum pump (7), enter water reservoir (5), desalting equipment is finished desalting process.Start building heating pipeline switching valve (14) in the time of must heating in the winter time and pipeline can be switched to the building heating pipeline, realize heat output the buildings heating.
Claims (5)
1. method of utilizing the sea water source heat pump technology to carry out sea water desaltination, system is by 1. power plant steam turbine condenser circulation refrigerated sea water, 2. condensers, 3. compressor, 4. vaporizer, 5. water reservoir, 6. high-pressure hydraulic pump, 7. jet vacuum pump, 8. phlegma recovery tube, 9. condenser, 10. water pump, 11. vapor recovery pipes, 12. producers, 13. the sea water source heat pump unit, compositions such as 14. building heating pipeline switching valves.
2. according to the right 1 described method of utilizing the sea water source heat pump technology to carry out sea water desaltination, be characterized in: power plant steam turbine condenser circulation refrigerated sea water (1) divides two-way, one the tunnel enters the condenser (2) of sea water source heat pump unit (13), and one the tunnel enters the vaporizer (4) of sea water source heat pump; Utilize the sea water source heat pump unit to extract low-grade exhaust heat in the seawater that enters vaporizer, the seawater that enters condenser is carried out temperature increase, carry out sea water desaltination at producer.
3. according to the right 1 described method of utilizing the sea water source heat pump technology to carry out sea water desaltination, be characterized in: the steam that will produce in producer through the seawater after the sea water source heat pump unit temperature increase is imitated the thermal source heating evaporation seawater of producer internal heating seawater as next, thereby obtains heat to imitate the operating mode that number utilizes.
4. according to the right 1 described method of utilizing the sea water source heat pump technology to carry out sea water desaltination, be characterized in: utilize jet vacuum pump in producer, to produce the negative pressure operating mode, water vapor, air and partially liq are taken out drawn simultaneously.
5. according to the right 1 described method of utilizing the sea water source heat pump technology to carry out sea water desaltination, be characterized in: the cold area of must heating of winter, the convertible production model of sea water source heat pump unit is as building heating system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101211378A CN101130442A (en) | 2006-08-25 | 2006-08-25 | Method for desalinating sea water by using seawater source heat pump technology |
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| CNA2006101211378A CN101130442A (en) | 2006-08-25 | 2006-08-25 | Method for desalinating sea water by using seawater source heat pump technology |
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| CN101130442A true CN101130442A (en) | 2008-02-27 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320672A (en) * | 2011-06-21 | 2012-01-18 | 中国神华能源股份有限公司 | Seawater desalination system and the method that desalinizes seawater in a kind of water power coproduction |
| CN102372329A (en) * | 2010-08-25 | 2012-03-14 | 益科博能源科技（上海）有限公司 | Multistage seawater desalting application system |
| CN101830541B (en) * | 2010-02-02 | 2012-11-07 | 张庆玉 | Underground reverse-osmosis seawater desalination vacuum plant system |
| CN103043737A (en) * | 2013-01-23 | 2013-04-17 | 林贤华 | Heat pump based all-weather sea water desalination system |
| CN103172131A (en) * | 2013-04-11 | 2013-06-26 | 南京航空航天大学 | Water-cooled sea water desalination flash system by thermoelectric heat pump and sea water desalination method |
| CN103204557A (en) * | 2012-01-16 | 2013-07-17 | 笹仓机械工程有限公司 | Vacuum evaporation desalination device |
| CN106855330A (en) * | 2017-01-04 | 2017-06-16 | 国网辽宁省电力有限公司本溪供电公司 | The filter method for being exchanged heat suitable for power plant and being purified |
| CN109269149A (en) * | 2018-07-23 | 2019-01-25 | 南京航空航天大学 | Coproduction electric system and method is concentrated in heat pump solution |
-
2006
- 2006-08-25 CN CNA2006101211378A patent/CN101130442A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830541B (en) * | 2010-02-02 | 2012-11-07 | 张庆玉 | Underground reverse-osmosis seawater desalination vacuum plant system |
| CN102372329A (en) * | 2010-08-25 | 2012-03-14 | 益科博能源科技（上海）有限公司 | Multistage seawater desalting application system |
| CN102320672A (en) * | 2011-06-21 | 2012-01-18 | 中国神华能源股份有限公司 | Seawater desalination system and the method that desalinizes seawater in a kind of water power coproduction |
| CN103204557A (en) * | 2012-01-16 | 2013-07-17 | 笹仓机械工程有限公司 | Vacuum evaporation desalination device |
| CN103204557B (en) * | 2012-01-16 | 2017-03-01 | 笹仓机械工程有限公司 | Vacuum evaporation desalination device |
| CN103043737A (en) * | 2013-01-23 | 2013-04-17 | 林贤华 | Heat pump based all-weather sea water desalination system |
| CN103043737B (en) * | 2013-01-23 | 2013-11-27 | 林贤华 | Heat pump based all-weather sea water desalination system |
| CN103172131A (en) * | 2013-04-11 | 2013-06-26 | 南京航空航天大学 | Water-cooled sea water desalination flash system by thermoelectric heat pump and sea water desalination method |
| CN106855330A (en) * | 2017-01-04 | 2017-06-16 | 国网辽宁省电力有限公司本溪供电公司 | The filter method for being exchanged heat suitable for power plant and being purified |
| CN106855330B (en) * | 2017-01-04 | 2020-01-31 | 国网辽宁省电力有限公司本溪供电公司 | Filtering method suitable for heat exchange and purification of power plant |
| CN109269149A (en) * | 2018-07-23 | 2019-01-25 | 南京航空航天大学 | Coproduction electric system and method is concentrated in heat pump solution |
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Open date: 20080227 |