CN202107547U - Sea water desalination system in hydroelectric cogeneration - Google Patents
Sea water desalination system in hydroelectric cogeneration Download PDFInfo
- Publication number
- CN202107547U CN202107547U CN2011202099189U CN201120209918U CN202107547U CN 202107547 U CN202107547 U CN 202107547U CN 2011202099189 U CN2011202099189 U CN 2011202099189U CN 201120209918 U CN201120209918 U CN 201120209918U CN 202107547 U CN202107547 U CN 202107547U
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- China
- Prior art keywords
- sea water
- heat pump
- heat
- steam
- seawater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000013535 sea water Substances 0.000 title claims abstract description 81
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 4
- 239000013505 freshwater Substances 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 6
- 229940059936 lithium bromide Drugs 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 239000006200 vaporizer Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 239000004078 cryogenic material Substances 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011552 falling film Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Landscapes
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The utility model belongs to the field of sea water desalination and relates to a sea water desalination system in hydroelectric cogeneration. The sea water desalination system comprises a power station steam turbine, a heat pump and a sea water desalination unit, wherein the power station steam turbine is used for providing steam turbine exhaust steam and motive steam for the heat pump, the heat pump is driven by the motive steam, absorbs heat of steam turbine exhaust steam and transfers the heat to material sea water, and the sea water desalination unit receives the material sea water pre-heated by the heat pump and performs sea water desalination. The sea water desalination system absorbs the heat of steam turbine exhaust steam, pre-heats the material sea water, improves temperature of the material sea water and yield of fresh water and reduces energy waste.
Description
Technical field
The utility model belongs to the sea water desaltination field, relates to seawater desalination system in a kind of water power coproduction.
Background technology
Sea water desalinization is claimed in sea water desaltination again, is the technology and the process of separating salt and water in the seawater.
The development of desalination technology and industrial application, existing semicentennial history, having formed during this period with MSF, r-o-and multiple-effect evaporation is the industrial technology of main representative.From the area; Middle East Gulf states will be first-selected with the MSF, because it has and maximizes with large (the single device water production rate is at present up to daily output fresh water 4～50,000 ton), is adapted to pollute the bay water and the low advantage of pre-treatment expense of weight; Yet the area will be a first-selection with r-o-or embrane method beyond in the Middle East.
Consider that from the practical application of power sector hot method sea water desaltination has bright development prospect; Particularly in recent years, still in constantly development and perfect, Technological Economy property improves constantly the low-temperature multi-effect technology, especially as far as the large-scale sea water distiling plant of water power coproduction, has special advantages and characteristic.
The low-temperature multi-effect technology is to utilize used heat or power plant, the low-quality steam in chemical plant; In placed in-line a series of horizontal pipe falling film evaporation devices; With lower temperature (being lower than 70 ℃) with sea water by distillation; Pass through repeatedly evaporation and condensation with a certain amount of steam input, thereby obtain being multiple times than the desalination process of the zero(ppm) water of importing quantity of steam.Each vaporizer is called " effect " again.
At present, also there is very large space in the many-sides such as design optimization, the maximization of low-temperature multi-effect device, raising low-temperature multi-effect system economy and novel material use in the water power coproduction.As shown in Figure 1, the low-temperature multiple-effect seawater desalination system generally adopted HTHP (for example pressure is that 0.55MPa, temperature are 320 ℃) steam when having improved water generation ratio, to weaken power generation capacity as thermal source during produced the domestic water Electricity Federation, and operation cost is higher.And the steam discharge condensation (heat release) after turbine acting becomes condensed water in thermal power plant, and through boosting, sending boiler back to after the deoxygenation, heating, the steam that boiler produces does work in turbine more again; In the working cycle of this heating agent, a large amount of heat of condensation of emitting has caused the waste of mass energy because low being difficult to of article bit comparison utilized.
Summary of the invention
The purpose of the utility model provides seawater desalination system in a kind of water power coproduction, to cryogenic material seawater preheating, reduces material seawater condensate depression, improves the economy of fresh water yield and system, reduces energy dissipation.
Seawater desalination system comprises in the water power coproduction of the utility model:
Power station steam turbine is used for to heat pump power steam and steam discharge being provided;
Heat pump is driven with the heat of absorption turbine discharge and with heat transferred material seawater by power steam; With
The sea water desaltination unit receives by the material seawater of heat pump preheating and carries out sea water desaltination.
Preferably, said heat pump is an absorption heat pump; More preferably, be lithium bromide absorption type heat pump.The quantity of heat pump is 1～20; When the quantity of heat pump >=2, for being connected in parallel, promptly turbine discharge gets into many heat pumps respectively the seawater that gets into each heat pump is carried out preheating between the heat pump, and the seawater of preheating gathers the back and gets into the sea water desaltination unit, to satisfy the seawater amount of multiple-effect evaporator needs.
In the utility model, all sea water desaltination unit are desalting plants known in the art, comprise spray equipment, multiple-effect evaporator, fresh water TFL, salt solution TFL etc.
Employed lithium bromide absorption type heat pump is a prior art in the utility model, and its principle of work is as shown in Figure 3.This lithium bromide absorption type heat pump is to utilize water at low temperature to be thermal source; Lithium-bromide solution is an absorption agent; Under the effect of driving heat source, the heat extraction in the low-temperature heat source is come out, and high-qualityly can be transferred to high temperature heat source, and then obtain the heating agent of higher quality together with what consume.
In the seawater desalination system of the utility model, heat pump fully reclaims and utilizes the turbine discharge heat; Power steam is also reclaimed heat by heat pump in as the heat pump driving heat source; Two portions heat all by the material Absorption by Sea Water through heat pump, has improved the material seawater temperature, improves fresh water yield, reduces energy dissipation.
Description of drawings
Fig. 1 is a water power co-generation system synoptic diagram of the prior art;
Fig. 2 is the seawater desalination system synoptic diagram of the utility model;
Fig. 3 is heat absorption type heat pump principle figure.
Embodiment
Combine accompanying drawing and embodiment explanation the utility model, but the utility model is not limited to this embodiment at present.
As shown in Figure 2, seawater desalination system comprises power station steam turbine 1, heat pump 2 and sea water desaltination unit, and this sea water desaltination unit comprises seawater spraying device 3 and vaporizer 4.Power station steam turbine 1 provides turbine discharge and as the power steam of driving heat source to heat pump 2; It is extracted steam from turbine; Extracted steam from turbine pipe 6 is used for to the extracted steam from turbine of heat pump 2 conveyings as driving heat source, and turbine discharge pipe 5 is used for carrying turbine discharges to heat pump 2.The material seawater gets in the heat pump 2 and carries out preheating to absorb heat, through the material seawater entering sea water desaltination unit of preheating.Seawater spraying device 3 in the sea water desaltination unit receives to be sprayed to behind the material seawater and carries out sea water desaltination on the vaporizer 4.
When carrying out sea water desaltination, introducing HP steam (0.5Mpa, 320 ℃) from power station steam turbine 1 is driving heat source, and extracted steam from turbine gets into heat pump 2 from extracted steam from turbine pipe 6, drives heat pump 2 and carries out work; Turbine discharge gets into the heat pump 2 from turbine discharge pipe 5, and heat pump 2 absorbs the heat of turbine discharge and extracted steam from turbine, and turbine discharge and extracted steam from turbine are discharged after the condensation in heat pump 2.The material seawater gets into heat pump 2, and heat pump 2 makes the material seawater obtain preheating in the turbine discharge and the extracted steam from turbine heat transferred material seawater that absorb.Material seawater after the preheating gets into seawater spraying device 3, is sprayed on the heat-exchanging tube bundle of vaporizer 4, and fresh water is produced in evaporation through low-temperature multi-effect.
The principle of work of heat pump 2 is as shown in Figure 3.This lithium bromide absorption type heat pump is to utilize water at low temperature to be thermal source; Lithium-bromide solution is an absorption agent; Under the effect of driving heat source, the heat extraction in the low-temperature heat source is come out, and high-qualityly can be transferred to high temperature heat source, and then obtain the heating agent of higher quality together with what consume.
Those skilled in the art can know, can use 1～20 heat pump in the utility model, to satisfy the material seawater amount of multiple-effect evaporator needs in the sea water desaltination unit.When the heat pump quantity of using >=2, for being connected in parallel, promptly turbine discharge gets into many heat pumps respectively the material seawater that gets into each heat pump is carried out preheating between the heat pump, and the seawater of preheating gathers entering sea water desaltination unit, back and carries out sea water desaltination.
Embodiment:
The low-temperature multiple-effect seawater desalination project: it is 9 effects that fresh water estimated output 25000t/d, vaporizer are always imitated number; Extracted steam from turbine parameter: the about 42.2t/h of flow, pressure 0.55MPa, 320 ℃ of temperature, specific enthalpy 3105kJ/kg; Material seawater parameter: 3440t/h, 30 ℃ of temperature, salinity 35.6g/kg.
The setting of seawater desalination system as stated.
Introducing HP steam 10t/h (pressure 0.5MPa, 320 ℃ of temperature) from turbine is driving heat source, orders about heat pump and carries out work, makes turbine discharge (about 40 ℃ of temperature) condensation in heat pump, and temperature further reduces.
The waste heat that heat pump will drive steam and the about 70t/h turbine discharge of flow passes to seawater (seawater flow 3440t/h, 30 ℃ of temperature), and the material seawater is carried out preheating.
Material seawater after the preheating gets into 9 single-effect evaporators, is sprayed onto equably on the seawater desalination evaporators heat-exchanging tube bundle; Seawater evaporates through the mode of low-temperature multi-effect, produces fresh water at last.
With do not use heat pump before compare, practice thrift high-quality steam (pressure 0.55MPa, 320 ℃ of temperature) about 8%, water generation ratio can bring up to 16.5 from 15, has reduced and has made the water cost; A part of turbine discharge waste heat is fully used simultaneously, has reduced the usage quantity of energy dissipation and recirculated cooling water.
Claims (4)
1. seawater desalination system in the water power coproduction is characterized in that, comprising:
Power station steam turbine is used for to heat pump turbine discharge and power steam being provided;
Heat pump is driven with the heat of absorption turbine discharge and with heat transferred material seawater by power steam; With
The sea water desaltination unit receives by the material seawater of heat pump preheating and carries out sea water desaltination.
2. seawater desalination system according to claim 1 is characterized in that, said heat pump is an absorption heat pump, and quantity is 1～20.
3. seawater desalination system according to claim 2 is characterized in that, when the quantity of heat pump >=2, between the heat pump for being connected in parallel.
4. according to any described seawater desalination system of claim 1～3, it is characterized in that said sea water desaltination unit comprises seawater spraying device and multiple-effect evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202099189U CN202107547U (en) | 2011-06-21 | 2011-06-21 | Sea water desalination system in hydroelectric cogeneration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202099189U CN202107547U (en) | 2011-06-21 | 2011-06-21 | Sea water desalination system in hydroelectric cogeneration |
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| Publication Number | Publication Date |
|---|---|
| CN202107547U true CN202107547U (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202099189U Expired - Lifetime CN202107547U (en) | 2011-06-21 | 2011-06-21 | Sea water desalination system in hydroelectric cogeneration |
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Cited By (3)
| 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 |
| CN102797523A (en) * | 2012-08-16 | 2012-11-28 | 中国核电工程有限公司 | Bleeder steam and exhaust steam comprehensive utilization method for nuclear turbine |
| CN105895179A (en) * | 2016-04-13 | 2016-08-24 | 中国核电工程有限公司 | Method of using nuclear power plant cooling tower waste heat to heat sea light raw water and reduce warm water discharge |
-
2011
- 2011-06-21 CN CN2011202099189U patent/CN202107547U/en not_active Expired - Lifetime
Cited By (4)
| 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 |
| CN102797523A (en) * | 2012-08-16 | 2012-11-28 | 中国核电工程有限公司 | Bleeder steam and exhaust steam comprehensive utilization method for nuclear turbine |
| CN105895179A (en) * | 2016-04-13 | 2016-08-24 | 中国核电工程有限公司 | Method of using nuclear power plant cooling tower waste heat to heat sea light raw water and reduce warm water discharge |
| CN105895179B (en) * | 2016-04-13 | 2021-11-16 | 中国核电工程有限公司 | Method for heating sea fresh water by using waste heat of cooling tower of nuclear power plant and reducing warm water discharge |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120111 |