CN203906025U - Island energy supply system - Google Patents

Island energy supply system Download PDF

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Publication number
CN203906025U
CN203906025U CN201420274099.XU CN201420274099U CN203906025U CN 203906025 U CN203906025 U CN 203906025U CN 201420274099 U CN201420274099 U CN 201420274099U CN 203906025 U CN203906025 U CN 203906025U
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China
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described
energy
power generation
island
heat
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CN201420274099.XU
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Chinese (zh)
Inventor
许剑
陈仕卿
张新敬
徐玉杰
纪律
陈海生
谭春青
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鄂尔多斯大规模储能技术研究所
中国科学院工程热物理研究所
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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
    • Y02A20/10Relating to general water supply, e.g. municipal or domestic water supply
    • 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
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/10Relating to general water supply, e.g. municipal or domestic water supply
    • Y02A20/124Water desalination
    • Y02A20/138Water desalination powered by a renewable energy source
    • Y02A20/141Water desalination powered by a renewable energy source the source being wind power
    • 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
    • Y02A20/10Relating to general water supply, e.g. municipal or domestic water supply
    • Y02A20/124Water desalination
    • Y02A20/138Water desalination powered by a renewable energy source
    • Y02A20/144Water desalination powered by a renewable energy source the source being wave energy
    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/30Energy from the sea
    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy
    • Y02E10/46Conversion of thermal power into mechanical power, e.g. Rankine, Stirling solar thermal engines
    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • 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
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy

Abstract

The utility model relates to an island energy supply system. The island energy supply system comprises an LNG power generation system unit, a renewable energy power generation and energy storage unit and a low-temperature multi-effect distillation sea water desalination system. The island energy supply system is a combined island energy supply system formed by a renewable energy power generation and energy storage system based on an LNG generator and unstable energy such as wind energy, solar energy and wave energy, waste heat of the system serves as a heat source of a sea water desalination unit. In the energy storage process, stored LNG is converted into high-pressure NG through cold storage gasification, and enters an NG storage tank and a pipe network system to be stored for use; secondly, energy of indirect cold of air compression is recycled through cold accumulation, throttling is carried out, and then compressed air is liquefied and stored. In the electricity utilization process, the high-pressure NG enters a turbine expander to do work after absorbing heat to be warmer, and then the high-temperature NG enters a small gas turbine combustion chamber to combust with the compressed air so as to drive a gas turbine to do work; liquid air enters the turbine expander to do work after being processed through cold accumulation and gradually absorbing heat to be warmer. The island energy supply system can supply electric energy and fresh water to an island at the same time, the unstable renewable energy is converted into stable controllable power generation output, the purposes of improving system efficiency and reducing electricity utilization cost are achieved, and the island energy supply system has great advantages compared with a traditional island energy supply system.

Description

A kind of island energy supplying system

Technical field

The utility model belongs to renewable energy power generation energy storage and intelligent energy systems technology field, specifically a kind of efficient associating island energy supplying system based on LNG (LNG Liquefied natural gas) generating and unsettled renewable energy power generation and energy-storage system composition.

Background technique

Contain the island of enriching renewable energy sources due to away from land, the cost and the maintenance cost that are connected with large electrical network are high, face the energy/electricity shortage problem always.In recent years, utilize renewable energy sources to solve island energy supply shortage problem, promote island and Regional Economic Development, protect the day by day fragile ecotope in island, obtain the extensive concern of whole world engineering field.

Present stage, the existing energy supplying system in island is mainly taking conventional power generation usage equipment as main,, latitude Sansha City southernmost strategically located and difficult of access taking China strategic location is example, on island, electric power total installation of generating capacity is 2000kW, is respectively the office of Dao Shang government and has two 500kW diesel generators with coastal guard area, Xisha 1000kW diesel generator and the army stationed on the island of resident living power utility.There is the problems such as generated energy is little, cost high, discharge existence pollution in conventional power generation usage equipment, certainly will affect sea island ecosystem if increase merely generator installation, seriously restricts Island Economy development.So adopting renewable energy system conventional power generation usage system to be supplemented or replace is the trend of the times of island energy supply.But renewable energy sources provides unstable power, become with flowing size, on island, user power utilization is also unstable, so it is the main method addressing this problem that renewable energy system combines with small-sized conventional power generation usage equipment and energy storage device, " the renewable energy sources plan of Crete " of Greece, the renewable energy sources plan of Spain Elhierro island and island, China Dan Gan island separate energy source system all attempt to address this problem.

In view of the unstable period of regenerative resource power supply system, energy storage has become the indispensable link of island energy supplying system.Conventional storage battery, due to its low energy densities, high maintenance cost, short working life and material contamination problem, has brought risk to the large-scale promotion of island energy supplying system.Compare with accumulation of energy means such as storage battery, pumped storage, super capacitors, compressed-air energy-storage system has that storage volume is large, the energy storage cycle is long, efficiency is high (50%-70%) and free of contamination advantage, can be used as the new direction of solution island regenerative resource power supply problem.

For this reason, this patent adopts LNG (LNG Liquefied natural gas) generating and renewable energy power generation and energy storage coupled system, first the pollutant load of rock gas NG fire emission is very low, next cold energy that utilizes LNG vaporization to discharge contributes to compressed-air actuated liquefaction, reduce liquefaction loss, air compressing liquefaction thermal energy storage process can change unsettled renewable energy power generation to stablize controlled electric power output into, then the waste heat that system produces just in time meets the waste heat supply temperature demand of desalination of sea water, can be used as the thermal source of low-temperature multi-effect sea water by distillation system.Introduce renewable energy sources and be conducive to reduce Fossil fuel consumption, and when renewable energy power generation power hour, LNG can meet need for electricity completely.Finally, LNG has lower price compared to diesel oil, and average price per ton is its 0.56 times, can amplitude peak reduction islander use energy cost.

Summary of the invention

The utility model proposes a kind of taking LNG (LNG Liquefied natural gas) cold energy use and power generation system as main, to be equipped with the renewable energy power generation of compressed-air energy storage and energy-storage system as auxiliary island energy supplying system, and add the low temperature multiple-effect distillation system that desalinizes seawater and realize desalination of sea water with the low grade heat energy that utilizes gas turbine exhaust gas waste heat and compression waste heat.

For realizing above-mentioned object, the technological scheme of the island energy supplying system that the utility model provides is:

A kind of island energy supplying system, comprising: LNG power generation system unit, renewable energy power generation and energy-storage units, low temperature multiple-effect distillation seawater desalination system, it is characterized in that,

--described LNG power generation system unit, comprise the LNG storage tank, cryopump I, cold-storage heat-exchanger, NG (rock gas) storage tank, regenerator, NG decompressor and the gas turbine that connect successively by pipeline, described cryopump I is introduced described cold-storage heat-exchanger by LNG from described LNG storage tank, and LNG enters in described NG storage tank after changing NG into absorb heat in described cold-storage heat-exchanger after; NG in described NG storage tank enters described NG decompressor through after the cold side pressure build up of described regenerator, in described NG decompressor, after expansion acting, enter the firing chamber of described gas turbine and promote described gas turbine acting, described gas turbine drives generator with pressurized air mixing after-combustion;

--described renewable energy power generation and energy-storage units, comprise renewable energy power generation device, drive unit, multistage cold compression unit, thermal accumulator I, throttle valve, liquid air low-temperature storage tank, cryopump II, thermal accumulator II, air expander group, described renewable energy power generation device connects described multistage cold compression unit by drive unit; In described multistage cold compression unit, the pressurized air that each stage compressor produces is all by entering in next stage compressor and further compress after described thermal accumulator I release heat, and the pressurized air that afterbody compressor produces enters described cold-storage heat-exchanger after by described thermal accumulator I release heat imports described liquid air low-temperature storage tank through throttle valve after further lowering the temperature; The bottom of described liquid air low-temperature storage tank arranges liquid air exhaust port, described liquid air exhaust port is connected with described cryopump II, described cold-storage heat-exchanger, thermal accumulator II, air expander group successively by pipeline, described liquid air exhaust port place arranges control valve, and described air expander group drives another generator work;

--described low temperature multiple-effect distillation sea water desalting subtense angle, comprise flash vessel, a condenser and the fresh-water pool of plural serial stage, the tail gas of described gas turbine passes into described thermal accumulator II release heat through the hot rear flank of described regenerator, pass into by the road afterwards described thermal accumulator I and absorb heat, enter atmosphere after passing into afterwards the evaporating pipe release heat of the first order flash vessel in the flash vessel of described plural serial stage; In the flash vessel of described plural serial stage, the water vapor that upper level produces passes in the evaporating pipe of next stage, the hot rear flank that the water vapor that afterbody flash vessel produces passes into described condenser with pass into the seawater to make heat exchange of this condenser cold side after pass into described fresh-water pool, the water vapor in the evaporating pipe of afterbody flash vessel passes into fresh water flash drum.

Island of the present utility model energy supplying system comprises energy storage and two working procedure of electricity consumption: in thermal energy storage process, first storage LNG enters cold-storage heat-exchanger released cold quantity and is gasificated as high-pressure natural gas NG after described cryopump I pressurization, enters NG storage tank and pipe network system and stores for future use; Secondly, the electric power that utilizes multistage cold compression unit of described renewable energy power generation unit that renewable energy power generation device is produced is converted into high-pressure air, and by described thermal accumulator I, the heat of compression is stored, cooled high-pressure air absorbs the cold of LNG cold energy and liquid air gasification cold-storage through described cold-storage heat-exchanger, then through throttle valve, high-pressure air is liquefied and stored in atmospheric pressure or under pressure liquid air storage tank.

Preferably, described renewable energy power generation device utilizes wind energy, solar energy, tidal energy or wave-energy power generation.

Further, described renewable energy power generation unit is equipped with battery pack simultaneously.

Island of the present utility model energy supplying system is in use electric process, first high-pressure natural gas NG enters the acting of NG turbo-expander after described regenerator heat absorption heats up, after enter the burning of described gas-turbine combustion chamber and pressurized air and drive the acting of combustion machine turbine, the common generator that drives produces electric energy, and combustion gas that regenerator discharges enters described thermal accumulator II and continues to discharge heat energy; Open described control valve, first liquid air in described liquid air low-temperature storage tank enters described cold-storage heat-exchanger and discharges, stores cold after described cryopump II pressurization, then progressively absorb heat to heat up through described thermal accumulator II and enter described air turbine decompressor acting, output power.

In energy storage and with in electric process, utilize the stored compression heat energy of thermal accumulator I and thermal accumulator II to arrange low temperature gas thermal energy and enter described low temperature multiple-effect distillation seawater desalination system, realize fresh water supply on island.

Preferably, described gas turbine is small size gas turbine.

Preferably, the suction port place of the first order compressor of described multistage cold compression unit arranges air filter.

Preferably, described multistage cold compression unit Placement can be coaxial series connection form or split axle parallel form.

The generated energy of described LNG power generation system unit regulates can be by regulating high-pressure natural gas NG flow to realize, and the generated energy of described renewable energy power generation unit regulates and can, by regulating liquid air mass flow to realize, meet the unstable need for electricity in island.

Liquid air in described low-temperature storage tank also can be used as emergent oxygen, nitrogen raw material processed on island.

The liquid air being extracted by cryopump II can be used as the refrigeration agent of central air-conditioner, thereby cold energy is provided, and reduces power load on island.

Therefore, the solution of a kind of island energy supplying system that the utility model provides, comprising:

LNG stores;

NG stores;

Storage NG electricity generating device;

Renewable energy power generation device;

Utilize this device and LNG vaporization to produce liquid air;

Store the liquid air of producing;

Utilize LNG generating to produce high-temperature fuel gas this liquid air that expands;

Reclaim and store this inflation process cold energy;

Use this expanded air to drive turbo machine;

Adopt compression waste heat and low temperature waste heat gas to carry out desalination of sea water.

After liquefied air gasification, be direct expansion acting, instead of enter gas-turbine combustion chamber as oxygenant.

According to the utility model embodiment, the production of liquid air also can utilize present stage technology maturation be widely used in industrial air liquefaction equipment, realizes in the time that the energy is superfluous the liquid air of producing with energy storage more.

The utility model provides island energy supplying system, can realize electric energy by LNG power generation system and renewable renewable energy system and supply with; Utilizing the heat of compression and low temperature combustion gas to realize fresh water by low temperature multiple-effect distillation seawater desalination system supplies with.

Particularly, renewable energy power generation and energy storage device in this island energy supplying system.Energy storage can (generating) process moves can be different time from releasing.In the time of low power consumption, can be powered separately by LNG power generation system, and renewable energy system mainly provides power generation pressurized air, and prepare liquefied air after absorbing LNG release cold energy; In the time of peak of power consumption, the liquefied air in renewable energy system can enter cold storage apparatus by cryopump pressurization and discharge cold energy, and after thermal accumulator 2 heat temperature raisings, enters air expander acting generating.

The utility model island energy supplying system has advantages of following compared with existing conventional power generation usage energy supplying system: the utility model for reducing island energy supply cost with reduce disposal of pollutants utilize technology and system.The utility model is supplied with for island fresh water, the storage of cold energy and heat energy and the technology of supply and system.Using energy source meets cascaded utilization of energy principle.LNG cold energy use, compression heat energy utilization, liquefied air cold energy use and NG combustion tail gas heat energy utilization, make this energy supplying system capacity usage ratio reach maximum.Realize the continual and steady generating of renewable energy sources.Be that stable liquid air is realized continuing, stablizing and export of electric energy with this by the renewable energy conversion that affected by weather, environment, and ensure higher transformation efficiency, good economy performance.Low pollution island energy supplying system.Compared with conventional diesel power generating equipment, the advantage such as LNG power generating equipment effulent is pollution-free, low noise, economic performance are good, is coordinating renewable energy system, can realize energy supplying system to island environment without injury.Island described in the utility model energy supplying system, has each start and stop simple and reliable, and each subtense angle independence is strong, and flexibility is good, can be convenient to install, safeguard and the transfer under condition is slightly disliked in extreme ocean.

Brief description of the drawings

Fig. 1 is the utility model embodiment's system diagram.

Embodiment

For making the purpose of this utility model, technological scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.

As shown in Figure 1, a kind of island energy supplying system that the utility model provides, comprising: LNG power generation system unit, renewable energy power generation and energy-storage units, low temperature multiple-effect distillation seawater desalination system.

Described LNG power generation system unit, comprise the LNG storage tank 1, cryopump I 2, cold-storage heat-exchanger 3, NG (rock gas) storage tank 4, regenerator 5, NG decompressor 6 and the gas turbine 7 that connect successively by pipeline, described cryopump I 2 is introduced described cold-storage heat-exchanger 3 by LNG from described LNG storage tank 1, and LNG enters in described NG storage tank 4 after changing NG into absorb heat in described cold-storage heat-exchanger 3 after; NG in described NG storage tank 4 enters described NG decompressor 6 through after the cold side pressure build up of described regenerator 5, in described NG decompressor 6, after expansion acting, enter the firing chamber 71 of described gas turbine 7 and promote described gas turbine 7 with pressurized air mixing after-combustion and do work, described gas turbine 7 drives generator 8;

--described renewable energy power generation and energy-storage units, comprise renewable energy power generation device 11, drive unit 12, multistage cold compression unit 13, thermal accumulator I 14, throttle valve 15, liquid air low-temperature storage tank 16, cryopump II 17, thermal accumulator II 18, air expander group 19, described renewable energy power generation device 11 connects described multistage cold compression unit 13 by drive unit 12; In described multistage cold compression unit 13, the pressurized air that each stage compressor produces is all by entering in next stage compressor and further compress after described thermal accumulator I 14 release heat, and the pressurized air that afterbody compressor produces enters after described cold-storage heat-exchanger 3 is further lowered the temperature after by described thermal accumulator I 14 release heat and imports described liquid air low-temperature storage tank 16 through throttle valve 15; The bottom of described liquid air low-temperature storage tank 16 arranges liquid air exhaust port, described liquid air exhaust port is connected with described cryopump II 17, described cold-storage heat-exchanger 3, thermal accumulator II 18, air expander group 19 successively by pipeline, described liquid air exhaust port place arranges control valve, and described air expander group 19 drives another generator work;

--described low temperature multiple-effect distillation sea water desalting subtense angle, comprise flash vessel 21, a condenser 22 and the fresh-water pool 23 of plural serial stage, the tail gas of described gas turbine 7 passes into described thermal accumulator II 18 release heat through the hot rear flank of described regenerator 5, pass into by the road afterwards described thermal accumulator I 14 and absorb heat, enter atmosphere after passing into afterwards the evaporating pipe release heat of the first order flash vessel in the flash vessel 21 of described plural serial stage; In the flash vessel 21 of described plural serial stage, the water vapor that upper level produces passes in the evaporating pipe of next stage, the hot rear flank that the water vapor that afterbody flash vessel produces passes into described condenser 22 with pass into the seawater to make heat exchange of these condenser 22 cold sides after pass into described fresh-water pool 23, the water vapor in the evaporating pipe of afterbody flash vessel passes into fresh water flash drum 24.

Island of the present utility model energy supplying system comprises energy storage and two working procedure of electricity consumption: in thermal energy storage process, first storage LNG enters cold-storage heat-exchanger 3 released cold quantities and is gasificated as high-pressure natural gas NG after described cryopump I 2 pressurizations, enters NG storage tank 4 and pipe network system and stores for future use; Secondly, the electric power that utilizes multistage cold compression unit 13 of described renewable energy power generation unit that renewable energy power generation device is produced is converted into high-pressure air, and by described thermal accumulator I 14 by heat of compression storage, cooled high-pressure air absorbs the cold of LNG cold energy and liquid air through described cold-storage heat-exchanger 3, then high-pressure air is liquefied and store in atmospheric pressure or under pressure liquid air storage tank 16 through throttle valve 15.

Preferably, described renewable energy power generation device 22 utilizes the unsettled renewable energy power generations such as wind energy, solar energy or wave energy.

Further, the described renewable energy power generation unit battery pack that equipped capacitor ratio is less is simultaneously to improve system loading adaptive capacity, and optimization system cost of investment.

Further, island of the present utility model energy supplying system is in use electric process, first high-pressure natural gas NG enters NG turbo-expander 6 and does work after described regenerator 5 heat absorptions heat up, after enter described gas-turbine combustion chamber 71 and drive combustion machine turbine 7 to do work with pressurized air burning, the common generator 8 that drives produces electric energy, and regenerator 5 combustion gas of discharging enters described thermal accumulator II 18 and continues to discharge heat energy; Open described control valve, first liquid air in described liquid air low-temperature storage tank 16 enters described cold-storage heat-exchanger 3 and discharges, stores cold after described cryopump II 17 pressurizations, then through described thermal accumulator II 18, the intensification of progressively absorb heat enters described air turbine decompressor 19 and does work, output power.

In energy storage and with in electric process, utilize the stored compression heat energy of thermal accumulator I 14 and the thermal accumulator II 18 low temperature gas thermal energy of arranging to enter described low temperature multiple-effect distillation seawater desalination system, realize fresh water supply on island.

Described gas turbine 7 is small size gas turbine, can be the gas turbine with methods for cooling in the middle of backheat, implements spatial scalable compression.

Described renewable electricity generating device 11 refers to one or more devices compound of wind-power electricity generation, solar electrical energy generation or tidal power generation.

In described compression, cooling procedure, also comprise the purification of air, remove airborne solid matter, its purification plant is filter.The suction port place that is the first order compressor of described multistage cold compression unit arranges air filter.

Described multistage cold compression unit Placement can be coaxial series connection form or split axle parallel form; In parallel form, each split axle and main driving axle are dynamically connected; Compressor air-dischargings at different levels all pass through thermal accumulator 1.

The generated energy of described LNG power generation system unit regulates can be by regulating high-pressure natural gas NG flow to realize, and the generated energy of described renewable energy power generation unit regulates and can, by regulating liquid air mass flow to realize, meet the unstable need for electricity in island.

Liquid air in described low-temperature storage tank also can be used as emergent oxygen, nitrogen raw material processed on island.

The liquid air being extracted by cryopump II can be used as the refrigeration agent of central air-conditioner, thereby cold energy is provided, and reduces power load on island.

The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment of making, be equal to replacement, improvement etc., within all should being included in scope of the present utility model.

Claims (6)

1. an island energy supplying system, comprising: LNG power generation system unit, renewable energy power generation and energy-storage units, low temperature multiple-effect distillation seawater desalination system, it is characterized in that,
--described LNG power generation system unit, comprise the LNG storage tank, cryopump I, cold-storage heat-exchanger, NG storage tank, regenerator, NG decompressor and the gas turbine that connect successively by pipeline, described cryopump I is introduced described cold-storage heat-exchanger by LNG from described LNG storage tank, and LNG enters in described NG storage tank after changing NG into absorb heat in described cold-storage heat-exchanger after; NG in described NG storage tank enters described NG decompressor through after the cold side pressure build up of described regenerator, in described NG decompressor, after expansion acting, enter the firing chamber of described gas turbine and promote described gas turbine acting, described gas turbine drives generator with pressurized air mixing after-combustion;
--described renewable energy power generation and energy-storage units, comprise renewable energy power generation device, drive unit, multistage cold compression unit, thermal accumulator I, throttle valve, liquid air low-temperature storage tank, cryopump II, thermal accumulator II, air expander group, described renewable energy power generation device connects described multistage cold compression unit by drive unit; In described multistage cold compression unit, the pressurized air that each stage compressor produces is all by entering in next stage compressor and further compress after described thermal accumulator I release heat, and the pressurized air that afterbody compressor produces enters described cold-storage heat-exchanger after by described thermal accumulator I release heat imports described liquid air low-temperature storage tank through throttle valve after further lowering the temperature; The bottom of described liquid air low-temperature storage tank arranges liquid air exhaust port, described liquid air exhaust port is connected with described cryopump II, described cold-storage heat-exchanger, thermal accumulator II, air expander group successively by pipeline, described liquid air exhaust port place arranges control valve, and described air expander group drives another generator work;
--described low temperature multiple-effect distillation sea water desalting subtense angle, comprise the flash vessel of plural serial stage, condenser, fresh water evaporating pot, brine trap, fresh water pump and fresh-water pool, the tail gas of described gas turbine passes into described thermal accumulator II through the hot rear flank of described regenerator and further discharges heat of high temperature, after passing into by the road afterwards described thermal accumulator I and absorbing heat or after directly passing into the evaporating pipe release heat of the first order flash vessel in the flash vessel of described plural serial stage, enter atmosphere, the flash distillation of flash vessel mesolow seawater generates fresh water steam and enters next evaporating pipe of imitating flash vessel as thermal source, make the seawater flash distillation that this flash vessel pressure is lower, simultaneously in evaporating pipe, water vapour heat release is condensed and is entered fresh water flash drum and collect fresh water, the fresh water steam of flash distillation converges the evaporating pipe that enters next effect flash vessel, brine after seawater flash distillation enters brine trap and collects, in the flash vessel of described plural serial stage, the water vapor that upper level produces passes in the evaporating pipe of next stage, the hot rear flank that the water vapor that afterbody flash vessel produces passes into described condenser with pass into the seawater to make heat exchange of this condenser cold side after pass into described fresh-water pool, water vapor in the evaporating pipe of afterbody flash vessel passes into fresh water flash drum, enters fresh-water pool after fresh water pump converges.
2. island according to claim 1 energy supplying system, is characterized in that, described renewable energy power generation device utilizes wind energy, solar energy, wave energy or tidal power.
3. island according to claim 1 energy supplying system, is characterized in that, described renewable energy power generation unit is equipped with battery pack.
4. island according to claim 1 energy supplying system, is characterized in that, described gas turbine is small size gas turbine.
5. island according to claim 1 energy supplying system, is characterized in that, the suction port place of the first order compressor of described multistage cold compression unit arranges air filter.
6. island according to claim 1 energy supplying system, is characterized in that, described multistage cold compression unit Placement is coaxial series connection form or split axle parallel form.
CN201420274099.XU 2014-05-27 2014-05-27 Island energy supply system CN203906025U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103993920A (en) * 2014-05-27 2014-08-20 鄂尔多斯大规模储能技术研究所 Island energy supply system with cold energy
CN104402159A (en) * 2014-11-28 2015-03-11 浙江大学 Plate type multistage flash evaporation desulfurization wastewater treatment and recovery device and method
CN105401989A (en) * 2015-12-10 2016-03-16 华电电力科学研究院 System and method for comprehensively utilizing liquefied natural gas (LNG) energy
CN105888742A (en) * 2016-06-02 2016-08-24 成都深冷液化设备股份有限公司 Efficient liquid air energy storage/release system
CN106830193A (en) * 2017-02-08 2017-06-13 广州中国科学院先进技术研究所 Island generates electricity and sea water desalting integral system and method
CN107777747A (en) * 2017-09-29 2018-03-09 江苏科技大学 A kind of LNG cold energy is used to generate electricity and seawater desalination system and its method of comprehensive utilization
WO2018119920A1 (en) * 2016-12-29 2018-07-05 深圳智慧能源技术有限公司 Lng gas turbine and starting system thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103993920A (en) * 2014-05-27 2014-08-20 鄂尔多斯大规模储能技术研究所 Island energy supply system with cold energy
CN104402159A (en) * 2014-11-28 2015-03-11 浙江大学 Plate type multistage flash evaporation desulfurization wastewater treatment and recovery device and method
CN104402159B (en) * 2014-11-28 2016-01-27 浙江大学 A kind of board-like multistage flash evaporation desulfurization wastewater disposal and recovery devices and methods therefor
CN105401989A (en) * 2015-12-10 2016-03-16 华电电力科学研究院 System and method for comprehensively utilizing liquefied natural gas (LNG) energy
CN105888742A (en) * 2016-06-02 2016-08-24 成都深冷液化设备股份有限公司 Efficient liquid air energy storage/release system
WO2018119920A1 (en) * 2016-12-29 2018-07-05 深圳智慧能源技术有限公司 Lng gas turbine and starting system thereof
CN106830193A (en) * 2017-02-08 2017-06-13 广州中国科学院先进技术研究所 Island generates electricity and sea water desalting integral system and method
CN107777747A (en) * 2017-09-29 2018-03-09 江苏科技大学 A kind of LNG cold energy is used to generate electricity and seawater desalination system and its method of comprehensive utilization

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