CN102910692A - Device and method for realizing sea water desalination and heat supply by utilizing open-type absorption heat pump - Google Patents
Device and method for realizing sea water desalination and heat supply by utilizing open-type absorption heat pump Download PDFInfo
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- CN102910692A CN102910692A CN2012103977368A CN201210397736A CN102910692A CN 102910692 A CN102910692 A CN 102910692A CN 2012103977368 A CN2012103977368 A CN 2012103977368A CN 201210397736 A CN201210397736 A CN 201210397736A CN 102910692 A CN102910692 A CN 102910692A
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Abstract
The invention discloses a device and a method for realizing sea water desalination and heat supply by utilizing an open-type absorption heat pump, wherein the device comprises a multi-effect sea water evaporation device which is provided with a high-temperature steam inlet and a low-pressure steam outlet, an absorber of the open-type absorption heat pump, a generator of the open-type absorption heat pump, a heat supply network pipeline and a heat exchanger; the generator of the open-type absorption heat pump comprises a generator shell which is internally provided with a driving steam pipeline; the absorber of the open-type absorption heat pump comprises an absorber shell which is internally provided with the heat supply network pipeline; the low-pressure steam outlet is connected with a low-pressure steam inlet; and a high-temperature steam outlet is connected with the high-temperature steam inlet. The device is capable of reducing the heat loss in the sea water desalination process, and simultaneously utilizing the heat to supply heat for a heat supply network, so that the energy utilization rate is improved.
Description
Technical field
The invention belongs to energy technology field, relate to a kind of open absorption heat pump that utilizes and realize the water cogeneration, realize the device and method of heat recovery.
Background technology
Along with the rapid increase of high speed development and the population of economic society, water resources crisis has become the second-biggest-in-the-world environmental problem that is only second to global warming.Worldwide general lack of water makes desalination technology desert area from middle-east expand to the main maritime nation in the whole world.In the face of the resource-type lack of water of northern China coastland and Southern Coast periphery water quality type lack of water, water resources are demanded urgently protecting and the severe situation of scientific utilization; when taking a series of effective measure such as retaining, interbasin water transfer, reclaimed wastewater reuse; use for reference international advanced experience; the seawater development desalination techniques wants fresh water to become the important channel that solves the coastland water scarcity to the sea.Sea water desaltination is the inevitable choice that solves water resources crisis, opens up new safe water source.2009, the whole world had 150 countries use desalination technologies, and several hundred million people drink or use desalination water, and desalination water increases with the speed of annual growth 10%～12%.It is reported, sea water desaltination " 12 " planning and the ad hoc planning of sea water desaltination industry that present National Development and Reform Committee is losing no time in formulating together with 11 departments, the coming five years China sea water desaltination scale of investment will reach about hundred million yuan of 2OO.
Current desalination technology is mainly take Re Fa and embrane method as main, embrane method is because its initial investment is less and the technical qualification advantage, more and more favored, but producing fresh water qualitatively not as hot method, and hot method is to processing fairly simple the early stage of water quality, power plant's steam heat is realized cogeneration around can considering to utilize, and greatly reduces the thermal source loss of power plant.And the embrane method operating process is to the negative impact of environment day by day obviously and outstanding, 21 century the energy and environmental problem day by day be subject to national governments and pay attention to.Hot method mainly contains 2 kinds of flash distillation and multiple-effect evaporations according to the mode that the obtains difference of its fresh water, and flash evaporation technology is because the large excessive defective of power consumption, usefulness fewer and feweri.Because the multiple-effect evaporation technology is more energy-conservation, is more and more favored.Along with developing rapidly of multiple-effect evaporation technology, also be convenient to realize water-electricity cogeneration with peripheral power plant that it uses the scale expanding day, can realize the comprehensive cyclic utilization of the energy simultaneously.
But inevitably have at present the inadequate problem of Btu utilization of end effect steam in the desalting seawater through multi-effect evaporation process, seriously restricted the desalination output of this technology, as shown in Figure 1, the driving heat source of multiple-effect seawater evaporator directly adopts steam turbine, and the steam of multiple-effect steam device end is then by discharging fresh water after the steamer cooling.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, a kind of device and method that utilizes open absorption heat pump to realize sea water desaltination and heat supply is provided, the present invention can reduce power loss, improve the comprehensive utilization ratio of the energy, is convenient to realize the recycle of energy.
Technical solution of the present invention is:
A kind of device that utilizes open absorption heat pump to realize sea water desaltination and heat supply, comprise the multiple-effect seawater evaporator, be provided with high-temperature steam entrance and low-pressure steam outlet at the multiple-effect seawater evaporator, it is characterized in that: the resorber that also comprises open absorption heat pump, the producer of open absorption heat pump, heat-net-pipeline and heat exchanger, the producer of described open absorption heat pump comprises generator body and is arranged on the interior absorbent solution of generator body, in described generator body, also be provided with one and drive vapour line, this pipeline is arranged in described absorbent solution, be provided with strong solution outlet and dilute solution inlet in the generator body lower end, be provided with the high-temperature steam outlet in the upper end of generator body; The resorber of described open absorption heat pump comprises absorber shell, in absorber shell, also be provided with absorbent solution, in described absorber shell, also be provided with a heat supply network pipeline, this heat supply network pipeline is positioned at described absorbent solution, be provided with the outlet of strong solution import and dilute solution in the absorber shell lower end, be provided with the low-pressure steam entrance in the upper end of absorber shell; Described strong solution outlet is connected by the first pipeline with the strong solution import, described dilute solution outlet is connected by the second pipeline with dilute solution inlet, described heat exchanger is arranged on described the first pipeline and the second pipeline, also is provided with a solution pump on the second pipeline; Described low-pressure steam outlet is connected with described low-pressure steam entrance; Described high-temperature steam outlet is connected with described high-temperature steam entrance.
The low-pressure steam that the last evaporator of multiple-effect seawater evaporator produces directly passes into the resorber of open absorption heat pump, absorbed by the absorption agent strong solution of the inside (such as LiBr etc.), heat-net-pipeline is linked to each other with the resorber of described open absorption heat pump, and the absorption process liberated heat is used for heating heat supply network hot water.
The mesolow cylinder steam discharge of steam turbine is connected to the producer of described open absorption heat pump by pipeline, as its driving heat source, the condensed water that finishes from described multiple-effect seawater evaporator heat release is sent into the moisturizing entrance of boiler by pipeline, as the moisturizing of boiler; The steam that the generator exports of open absorption heat pump produces is connected to the multiple-effect seawater evaporator by pipeline, as the heat source of sea water desaltination flow process.
The absorption agent dilute solution of the resorber of open absorption heat pump outlet is transported to the producer of open absorption heat pump by solution pump, and carries out heat exchange with the absorption agent strong solution of the generator exports of open absorption heat pump in heat exchanger.
A kind of method of utilizing open absorption heat pump to realize sea water desaltination and heat supply of the present invention may further comprise the steps:
The mesolow cylinder steam discharge of A, steam turbine heats the absorption agent dilute solution in the producer of described open absorption heat pump by driving vapour line, the high-temperature steam of emitting is passed into described multiple-effect seawater evaporator;
B, as the high-temperature steam of heat source after described multiple-effect seawater evaporator is emitted heat, become condensed water, can be used as the moisturizing of boiler;
The low-pressure steam that C, described multiple-effect seawater evaporator end effect produce directly absorbs in the resorber of described open absorption heat pump, emits simultaneously amount of heat;
D, the hot water pipe net of heat supply network is connected to the resorber of described open absorption heat pump, absorbs the heat in its absorption process;
E, heat exchanger, finish a heat exchange with the dilute solution that enters the producer of described open absorption heat pump from the absorption agent strong solution of the generator exports of described open absorption heat pump;
F, be transported to the producer of described open absorption heat pump from the resorber absorption agent dilute solution out of described open absorption heat pump by solution pump, finish the once circulation of absorbent solution.
The present invention compared with prior art has following advantage:
(1) the present invention is shown in Figure 1 at present directly draws gas more energy-conservation for sea water desaltination from steam turbine mesolow cylinder, the Btu utilization of the end effect steam that produces as shown in Figure 1 is very insufficient, directly discharge as desalination water after the preheating, and the present invention extracts this part heat by described open absorption heat pump system, utilize this part heat to be used for the heating hot net water, avoided a large amount of losses of end effect steam energy in the desalting process.
(2) the present invention has utilized the energy of end effect steam in the seawater desalination system to be used for heat supply, and more single compare from the extracted steam from turbine heat supply, and heat capacity has significantly and promotes, and the unit generation ability increases.
(3) the present invention compares single than sea water desaltination with heat supply, increased the open absorption heat pump system, mainly comprise the resorber of open absorption heat pump, producer and the relevant auxiliary of open absorption heat pump, the sea water desaltination that its comprehensive energy consumption level is more single or central heating have been compared and have been declined to a great extent, and can realize simultaneously heat supply and sea water desaltination.
(4) the present invention also replenishes for boiler provides certain moisturizing, sea water desalinating plant, become condensed water after the heat release from the producer steam out of described open absorption heat pump, this part water can be used as the supplementary feed of boiler, can greatly reduce the water loss of power plant.
Description of drawings
Fig. 1 is the multi-effect sea water desalting synoptic diagram of prior art.
Fig. 2 is that the present invention utilizes open absorption heat pump to realize the synoptic diagram of sea water desalinating plant.
1, the multiple-effect seawater evaporator, 11, last evaporator, 12, the high-temperature steam entrance, 13, the low-pressure steam outlet, 14, the condensed water outlet, 15, the strong brine outlet, 16, water outlet, 17, sea intake, 2, the resorber of open absorption heat pump, 21, the strong solution import, 22, the dilute solution outlet, 23, the low-pressure steam entrance, 3, the producer of open absorption heat pump, 31, the strong solution outlet, 32, dilute solution inlet, 33, the high-temperature steam outlet, 4, heat exchanger, 5, solution pump, 6, drive vapour line, 7, the heat supply network pipeline, 8, the first pipeline, 9, the second pipeline, 10, condenser.
Embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated: as shown in Figure 1, the present invention utilizes open absorption heat pump to realize the device of sea water desaltination and heat supply, comprise multiple-effect seawater evaporator 1, the resorber 2 of open absorption heat pump, the producer 3 of open absorption heat pump, heat supply network pipeline 7 and heat exchanger 4, be provided with high-temperature steam entrance 12 and low-pressure steam outlet 13 at multiple-effect seawater evaporator 1, the producer 3 of open absorption heat pump comprises generator body and is arranged on the interior absorbent solution of generator body, in generator body, also be provided with one and drive vapour line 6, this pipeline is arranged in absorbent solution, be provided with strong solution outlet 31 and dilute solution inlet 32 in the generator body lower end, be provided with high-temperature steam outlet 33 in the upper end of generator body; The resorber 2 of open absorption heat pump comprises absorber shell, in absorber shell, also be provided with absorbent solution, in absorber shell, also be provided with a heat supply network pipeline 7, this heat supply network pipeline 7 is positioned at described absorbent solution, be provided with strong solution import 21 and dilute solution outlet 22 in the absorber shell lower end, be provided with low-pressure steam gangway 23 in the upper end of absorber shell; Strong solution outlet 31 is connected by the first pipeline 8 with strong solution import 21, and dilute solution exports 22 and is connected by the second pipeline 9 with dilute solution inlet 32, and heat exchanger 4 is arranged on the first pipeline and the second pipeline, also is provided with a solution pump 5 on the second pipeline; Low-pressure steam outlet 13 is connected with low-pressure steam entrance 23; High-temperature steam outlet 33 is connected with high-temperature steam entrance 12.The thermal source that drives vapour line 6 is from the mesolow cylinder steam discharge of steam turbine and heat absorption agent dilute solution in the producer of open absorption heat pump, and the high-temperature steam of emitting is passed into described multiple-effect seawater evaporator.
The inventive method may further comprise the steps:
The mesolow cylinder steam discharge of A, steam turbine heats the absorption agent dilute solution in the producer of described open absorption heat pump by driving vapour line, the high-temperature steam of emitting is passed into described multiple-effect seawater evaporator;
B, as the high-temperature steam of heat source after described multiple-effect seawater evaporator is emitted heat, become condensed water, can be used as the moisturizing of boiler;
The low-pressure steam that C, described multiple-effect seawater evaporator end effect produce directly absorbs in the resorber of described open absorption heat pump, emits simultaneously amount of heat;
D, the hot water pipe net of heat supply network is connected to the resorber of described open absorption heat pump, absorbs the heat in its absorption process;
E, heat exchanger, finish a heat exchange with the dilute solution that enters the producer of described open absorption heat pump from the absorption agent strong solution of the generator exports of described open absorption heat pump;
F, be transported to the producer of described open absorption heat pump from the resorber absorption agent dilute solution out of described open absorption heat pump by solution pump, finish the once circulation of absorbent solution.
Claims (2)
1. device that utilizes open absorption heat pump to realize sea water desaltination and heat supply, comprise the multiple-effect seawater evaporator, be provided with high-temperature steam entrance and low-pressure steam outlet at the multiple-effect seawater evaporator, it is characterized in that: the resorber that also comprises open absorption heat pump, the producer of open absorption heat pump, heat-net-pipeline and heat exchanger, the producer of described open absorption heat pump comprises generator body and is arranged on the interior absorbent solution of generator body, in described generator body, also be provided with one and drive vapour line, this pipeline is arranged in described absorbent solution, be provided with strong solution outlet and dilute solution inlet in the generator body lower end, be provided with the high-temperature steam outlet in the upper end of generator body; The resorber of described open absorption heat pump comprises absorber shell, in absorber shell, also be provided with absorbent solution, in described absorber shell, also be provided with a heat supply network pipeline, this heat supply network pipeline is positioned at described absorbent solution, be provided with the outlet of strong solution import and dilute solution in the absorber shell lower end, be provided with the low-pressure steam entrance in the upper end of absorber shell; Described strong solution outlet is connected by the first pipeline with the strong solution import, described dilute solution outlet is connected by the second pipeline with dilute solution inlet, described heat exchanger is arranged on described the first pipeline and the second pipeline, also is provided with a solution pump on the second pipeline; Described low-pressure steam outlet is connected with described low-pressure steam entrance; Described high-temperature steam outlet is connected with described high-temperature steam entrance.
2. a method of utilizing device claimed in claim 1 to realize sea water desaltination and heat supply is characterized in that, may further comprise the steps:
The mesolow cylinder steam discharge of A, steam turbine heats the absorbent solution in the producer of described open absorption heat pump by driving vapour line, the high-temperature steam of emitting is passed into described multiple-effect seawater evaporator;
B, as the high-temperature steam of heat source after described multiple-effect seawater evaporator is emitted heat, become condensed water, as the moisturizing of boiler;
The low-pressure steam that C, described multiple-effect seawater evaporator end effect produce directly absorbs in the resorber of described open absorption heat pump, emits simultaneously amount of heat;
D, the hot water pipe net of heat supply network is connected to the resorber of described open absorption heat pump, absorbs the heat in its absorption process;
E, heat exchanger, finish a heat exchange with the dilute solution that enters the producer of described open absorption heat pump from the absorption agent strong solution of the generator exports of described open absorption heat pump;
F, be transported to the producer of described open absorption heat pump from the resorber absorption agent dilute solution out of described open absorption heat pump by solution pump, finish the once circulation of absorbent solution.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103977368A CN102910692A (en) | 2012-10-18 | 2012-10-18 | Device and method for realizing sea water desalination and heat supply by utilizing open-type absorption heat pump |
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| CN2012103977368A CN102910692A (en) | 2012-10-18 | 2012-10-18 | Device and method for realizing sea water desalination and heat supply by utilizing open-type absorption heat pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104724776A (en) * | 2015-01-22 | 2015-06-24 | 北京和默能源技术有限公司 | Device and method for mixing secondary steam into pressurized water in pressurized evaporation |
| CN106219855A (en) * | 2016-09-06 | 2016-12-14 | 大唐环境产业集团股份有限公司 | Direct Air-cooled Unit recuperation of heat and water treatment facilities and recuperation of heat and method for treating water |
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| CN1224697A (en) * | 1998-01-28 | 1999-08-04 | 三菱重工业株式会社 | Evaporative concentration apparatus for waste water |
| CN1967055A (en) * | 2006-08-25 | 2007-05-23 | 李华玉 | Backheating and heating technology by using residual heat of exhaust steam in steam power cycle |
| CN102287957A (en) * | 2011-07-18 | 2011-12-21 | 清华大学 | Open absorption heat pump |
| 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 |
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2012
- 2012-10-18 CN CN2012103977368A patent/CN102910692A/en active Pending
Patent Citations (4)
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| CN1224697A (en) * | 1998-01-28 | 1999-08-04 | 三菱重工业株式会社 | Evaporative concentration apparatus for waste water |
| CN1967055A (en) * | 2006-08-25 | 2007-05-23 | 李华玉 | Backheating and heating technology by using residual heat of exhaust steam in steam power cycle |
| 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 |
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Non-Patent Citations (1)
| Title |
|---|
| 苏庆善等: "LiBr吸收式热泵海水淡化工艺流程的研究", 《清华大学学报(自然科学版)》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104724776A (en) * | 2015-01-22 | 2015-06-24 | 北京和默能源技术有限公司 | Device and method for mixing secondary steam into pressurized water in pressurized evaporation |
| CN104724776B (en) * | 2015-01-22 | 2018-04-03 | 北京和默能源技术有限公司 | Devices and methods therefor in pressure evaporating indirect steam incorporation press water |
| CN106219855A (en) * | 2016-09-06 | 2016-12-14 | 大唐环境产业集团股份有限公司 | Direct Air-cooled Unit recuperation of heat and water treatment facilities and recuperation of heat and method for treating water |
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Application publication date: 20130206 |