CN110285636A - A kind of simultaneous cold supply system of LNG cold energy and waste heat boiler utilizing waste heat for refrigeration - Google Patents
A kind of simultaneous cold supply system of LNG cold energy and waste heat boiler utilizing waste heat for refrigeration Download PDFInfo
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- CN110285636A CN110285636A CN201910645194.3A CN201910645194A CN110285636A CN 110285636 A CN110285636 A CN 110285636A CN 201910645194 A CN201910645194 A CN 201910645194A CN 110285636 A CN110285636 A CN 110285636A
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- lng
- water
- waste heat
- cold energy
- heat
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- 239000002918 waste heat Substances 0.000 title claims abstract description 79
- 238000005057 refrigeration Methods 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 121
- 238000001816 cooling Methods 0.000 claims abstract description 73
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000003546 flue gas Substances 0.000 claims abstract description 43
- 238000003860 storage Methods 0.000 claims abstract description 30
- 238000002309 gasification Methods 0.000 claims abstract description 18
- 239000000446 fuel Substances 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 10
- 238000003032 molecular docking Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000009833 condensation Methods 0.000 claims description 11
- 230000005494 condensation Effects 0.000 claims description 11
- IPLONMMJNGTUAI-UHFFFAOYSA-M lithium;bromide;hydrate Chemical compound [Li+].O.[Br-] IPLONMMJNGTUAI-UHFFFAOYSA-M 0.000 claims description 11
- 239000003507 refrigerant Substances 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 210000000582 semen Anatomy 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 239000002826 coolant Substances 0.000 claims description 4
- 239000003345 natural gas Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims 1
- 229910052794 bromium Inorganic materials 0.000 claims 1
- 229910052744 lithium Inorganic materials 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000006392 deoxygenation reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000036642 wellbeing Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D16/00—Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery
-
- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
A kind of simultaneous cold supply system of LNG cold energy and waste heat boiler utilizing waste heat for refrigeration of the present invention, LNG gasification system is arranged in by LNG storage tank, parallel way docking is used with LNG cold energy use system, when LNG cold energy use, part LNG enter in high pressure water bath type gasifier gasify after, enter in gas turbine as fuel；LNG cold energy use system recycles the cold energy of LNG gasification by two-stage heat-exchange system, and is used to be made 5 DEG C of cold water for the part cold energy, and be delivered to cooling supply pipe-line system；12 DEG C of the water returned from cooling supply pipe-line system, is back to LNG cold energy use system；Exhaust-heat boiler flue gas utilizing waste heat for refrigeration system is for being made 5 DEG C of cold water and being delivered to cooling supply pipe-line system；5 DEG C of the cold water that cooling supply pipe-line system is used to come from LNG cold energy use system and exhaust-heat boiler flue gas utilizing waste heat for refrigeration system is through pipeline to each with colod-application family, 12 DEG C of the water after being heated up with the heat exchange of colod-application family, distribution forms circulation to LNG cold energy use system and exhaust-heat boiler flue gas utilizing waste heat for refrigeration system.
Description
Technical field
The invention belongs to residual heat of electric power plant, waste colds to utilize field, and in particular to a kind of LNG cold energy and waste heat boiler utilizing waste heat for refrigeration
Simultaneous cold supply system.
Background technique
LNG is natural gas by dehydration desulfurization process, the cryogenic liquid mixtures formed by low temperature process cryogenic liquefaction,
Temperature is -162 DEG C.LNG acts not only as fuel use, while self-contained a large amount of high-grade cold energy.During LNG gasification
Cold energy reach about 830kJ/kg (gasification latent heat including LNG and the sensible heat for being warming up to environment temperature).Currently, power station is using
When LNG is as fuel, it usually needs heating of first gasifying to it.In this process, the cooling capacity that LNG is carried is usually by secondary water band
It walks.Not only gas fuel itself is not consumed by recycling LNG cold energy, but also it is dirty to generate additional environment
Dye.Meanwhile air conditioner cold water is made in the LNG cold energy of recycling, realize central cooling, it may have preferable economic benefit.
The waste heat boiler exhaust gas temperature of F grades of combined cycle units of current large size is generally 90 DEG C or so.As power plant uses
The problems such as fuel is LNG, then not sulfur-bearing in propellant composition, acid corrosion without considering waste heat boiler, corresponding waste heat boiler row
Cigarette dew-point temperature is equal to the aqueous dew point temperature of flue gas.Therefore, theoretically, the limiting temperature that exhaust-heat boiler flue gas can be down to is about 60
DEG C (consider flue-gas temperature should be higher by 10 DEG C of dew-point temperature).As can the waste heat in smoke evacuation is passed through the side of increase back-end surfaces
Formula is converted into hot water, and air conditioner cold water is made by hot water lithium bromide water cooler, realizes central cooling, not only conforms with energy
The target of source cascade utilization can also bring considerable economic well-being of workers and staff for power plant.
Summary of the invention
The purpose of the present invention is propose the LNG cold energy and exhaust-heat boiler flue gas of a kind of power plant for the cold needs of user
The simultaneous cold supply system of utilizing waste heat for refrigeration, it is contemplated that the growing cold demand in city from realization energy cascade utilization, promotes electricity
The target of factory's economic benefit is set out, which is suitable for using combined-cycle power plant of the LNG as fuel.By using the system
The LNG cold energy and exhaust-heat boiler flue gas utilizing waste heat for refrigeration that power plant can be made full use of, make power plant become the central cooling center in region.
The present invention adopts the following technical scheme that realize:
A kind of simultaneous cold supply system of LNG cold energy and waste heat boiler utilizing waste heat for refrigeration, including LNG gasification system, LNG cold energy benefit
With system, exhaust-heat boiler flue gas utilizing waste heat for refrigeration system and cooling supply pipe-line system；Wherein,
LNG gasification system is arranged in by LNG storage tank, uses parallel way docking, including high pressure with LNG cold energy use system
Water bath type gasifier, when LNG cold energy use, part LNG enters in high pressure water bath type gasifier after gasification, enters as fuel
In gas turbine；
LNG cold energy use system recycles the cold energy of LNG gasification by two-stage heat-exchange system, and the part cold energy is used to make
5 DEG C of cold water is obtained, and is delivered to cooling supply pipe-line system；12 DEG C of the water returned from cooling supply pipe-line system is back to LNG cold energy benefit
With system, circulation is formed；
Exhaust-heat boiler flue gas utilizing waste heat for refrigeration system is for being made 5 DEG C of cold water and being delivered to cooling supply pipe-line system；
5 DEG C for will come from LNG cold energy use system and exhaust-heat boiler flue gas utilizing waste heat for refrigeration system of cooling supply pipe-line system
Cold water through pipeline to each with colod-application family, from 12 DEG C of water after the heat exchange heating of colod-application family, distribution to LNG cold energy use
System and exhaust-heat boiler flue gas utilizing waste heat for refrigeration system form circulation.
A further improvement of the present invention lies in that LNG cold energy use system includes two-stage heat-exchange system, when work, level-one is changed
Refrigerant in the coolant storage tank of hot systems enters in the heat exchanger of level-one heat-exchange system and after LNG heat exchange, cooling, changes by level-one
The refrigerant pump of hot systems is re-fed into the heat exchanger of secondary heat exchange system；LNG after heat exchange, heating, which enters in auxiliary heating apparatus, to be heated,
Fuel is re-used as to enter in gas turbine；12 DEG C of water enter the heat exchanger of secondary heat exchange system in the water storage tank of secondary heat exchange system
It exchanges heat with refrigerant, after being cooled to 5 DEG C of cold water, the water pump through secondary heat exchange system enters cooling supply pipe-line system；From cooling supply pipeline
12 DEG C of the water that system returns is delivered in the water storage tank of secondary heat exchange system, is entered back into the heat exchanger of secondary heat exchange system and is changed
Heat drop temperature forms refrigeration cycle.
A further improvement of the present invention lies in that exhaust-heat boiler flue gas utilizing waste heat for refrigeration system includes the heating of waste heat boiler condensed water
The water pump of device, hot water lithium bromide refrigeration machine and afterheat boiler system, when work, the waste heat boiler in exhaust-heat boiler flue gas exit
The hot water that the exit of condensation water heater is drawn is sent into hot water lithium bromide refrigeration machine, and it is solidifying that waste heat boiler is back to after heat exchange
The entrance of heater is born water, its remaining hot water in the exit of condensation water heater, which then enters, removes oxygen evaporator and deoxygenation drum
In, it is heated to be saturated vapor；Hot water lithium bromide refrigeration mechanism obtains 5 DEG C of cold water, and the water through afterheat boiler system is pumped to
Cooling supply pipe-line system；12 DEG C of the water returned from cooling supply pipe-line system, which is delivered in hot water lithium bromide refrigeration machine, to freeze, and is formed
Circulation.
A further improvement of the present invention lies in that cooling supply pipe-line system includes the first water storage tank, the second water storage tank and cooling supply
The water pump of pipe-line system, when work, 5 DEG C made from the LNG cold energy use system and exhaust-heat boiler flue gas utilizing waste heat for refrigeration system
Cold water imports in the first water storage tank, and the water pump through cooling supply pipe-line system, by lay to be supplied to each pipeline with colod-application family defeated
It send to each with colod-application family；Second is back to through each pipeline returned with colod-application family with 12 DEG C of water after the heat exchange heating of colod-application family
In water storage tank, then it is delivered to LNG cold energy use system and exhaust-heat boiler flue gas utilizing waste heat for refrigeration system progress refrigeration cool-down, shape respectively
At circulation.
A further improvement of the present invention lies in that being opened when the semen donors of LNG cold energy use system are unable to satisfy cooling needs
It opens exhaust-heat boiler flue gas utilizing waste heat for refrigeration system to freeze, to meet cooling needs；When the semen donors of LNG cold energy use system are super
When crossing cooling needs, then exhaust-heat boiler flue gas utilizing waste heat for refrigeration system is closed, LNG cold energy use system is used only and carries out cooling supply.
A further improvement of the present invention lies in that when power plant does not use LNG but pipe natural gas is used only as fuel,
Then cooling supply is carried out using exhaust-heat boiler flue gas utilizing waste heat for refrigeration system.
The present invention has following beneficial technical effect:
The simultaneous cold supply system of a kind of LNG cold energy and waste heat boiler utilizing waste heat for refrigeration provided by the invention, including LNG gasification system
System, LNG cold energy use system, exhaust-heat boiler flue gas utilizing waste heat for refrigeration system and cooling supply pipe-line system, wherein LNG gasification system with
LNG cold energy use system does not influence technique on main pipeline when LNG cold energy use system is not run using parallel way docking
The normal production of equipment；When emergency occurs, the LNG stream amount of LNG cold energy use system can be reduced by robot control system(RCS),
LNG gasifies the gasification system.
LNG cold energy use system recycles the cold energy of LNG gasification by two-stage heat-exchange system, and the part cold energy is used to make
5 DEG C of cold water is obtained, and is delivered to cooling supply pipe-line system.12 DEG C of the water returned from cooling supply pipe-line system is back to by water pump
LNG cold energy use system forms circulation.When cooling needs are smaller or are not necessarily to cooling supply, can be decreased or turned off by robot control system(RCS)
LNG cold energy use system.
Exhaust-heat boiler flue gas utilizing waste heat for refrigeration system extracts one hot water out from the condensation water heater of waste heat boiler tail portion, passes through
Water supply line is delivered to lithium bromide cooling-water machine group, hot water in refrigeration unit after cooling forms warm water, by water return pipeline and
Force (forcing) pump is back to condensate pump outlet conduit, forms circulation.Meanwhile 5 DEG C of cold water and conveying is made in lithium bromide cooling-water machine group
To cooling supply pipe-line system.12 DEG C of the water returned from cooling supply pipe-line system is back to fume afterheat refrigeration system by water pump,
Form circulation.When cooling needs are smaller or are not necessarily to cooling supply, can be decreased or turned off by robot control system(RCS) from waste heat boiler tail portion
The hot water amount of condensation water heater extraction is decreased or turned off cooling supply.
5 DEG C of the cold water that cooling supply pipe-line system is come from LNG cold energy use system and exhaust-heat boiler flue gas utilizing waste heat for refrigeration system
Be introduced into water storage tank, then through pipeline to each with colod-application family.12 DEG C of the water after being heated up with the heat exchange of colod-application family is back to another
One water storage tank, and distribute to LNG cold energy use system and exhaust-heat boiler flue gas utilizing waste heat for refrigeration system, form circulation.
Detailed description of the invention
Fig. 1 is total system schematic diagram of the invention.
Fig. 2 is LNG cold energy use system schematic.
Fig. 3 is exhaust-heat boiler flue gas utilizing waste heat for refrigeration system schematic.
Fig. 4 is cooling supply schematic piping diagram.
Description of symbols:
1 is LNG storage tank；2 be high pressure water bath type gasifier；3 be LNG cold energy use system；3A is level-one heat-exchange system
Coolant storage tank；3B is the heat exchanger of level-one heat-exchange system；3C is the refrigerant pump of level-one heat-exchange system；3D is secondary heat exchange system
Heat exchanger；3E is the water pump of secondary heat exchange system；3F is the water storage tank of secondary heat exchange system；4 be auxiliary heating apparatus；5 be gas turbine；
6 be exhaust-heat boiler flue gas utilizing waste heat for refrigeration system；6A is waste heat boiler condensation water heater；6B is hot water lithium bromide refrigeration machine；
6C is the water pump of utilizing waste heat for refrigeration system；7 be cooling supply pipe-line system；7A is the first water storage tank；7B is the second water storage tank；7C is to be supplied to
Respectively with the pipeline at colod-application family；7D is each pipeline returned with colod-application family；7E is the water pump of cooling supply pipe-line system, and 8 be deoxygenation drum,
9 is except oxygen evaporators.
Specific embodiment
Below in conjunction with attached drawing and example, the present invention will be described in detail:
As shown in Figure 1, the simultaneous cooling supply system of a kind of LNG cold energy provided by the invention and exhaust-heat boiler flue gas utilizing waste heat for refrigeration
System, comprising: be arranged in the LNG gasification system on 1 side of LNG storage tank.The LNG gasification system is with LNG cold energy use system 3 using in parallel
Mode docking.When LNG cold energy use, part LNG enter in high pressure water bath type gasifier 2 gasify after, enter combustion as fuel
In gas-turbine 5.
As shown in Fig. 2, being LNG cold energy use system 3.The system includes two-stage heat-exchange system.Under normal operating conditions,
Refrigerant in the coolant storage tank 3A of level-one heat-exchange system enters in the heat exchanger 3B of level-one heat-exchange system and after LNG heat exchange, cooling,
By the refrigerant pump 3C of level-one heat-exchange system, it is re-fed into the heat exchanger 3D of secondary heat exchange system；Heat exchange, heating after LNG into
Enter and heated in auxiliary heating apparatus 4, is re-used as fuel and enters in gas turbine 5；12 DEG C of water enter in the water storage tank 3F of secondary heat exchange system
The heat exchanger 3D and refrigerant of secondary heat exchange system exchange heat, and after being cooled to 5 DEG C of cold water, the water pump 3E through secondary heat exchange system enters
Cooling supply pipe-line system 7.In the water storage tank 3F that 12 DEG C of the water returned from cooling supply pipe-line system 7 is delivered to secondary heat exchange system, then
Into the cooling that exchanges heat in the heat exchanger 3D of secondary heat exchange system, refrigeration cycle is formed.
As shown in figure 3, being exhaust-heat boiler flue gas utilizing waste heat for refrigeration system 6.Under normal operating conditions, exhaust-heat boiler flue gas goes out
The hot water that the exit of waste heat boiler condensation water heater 6A at mouthful is drawn is sent into hot water lithium bromide refrigeration machine 6B, is exchanged heat
It is back to the entrance of waste heat boiler condensation water heater 6A afterwards；Its remaining hot water in the exit of condensation water heater 6A then enters
Except being heated to be saturated vapor in oxygen evaporator 9 and deoxygenation drum 8.5 DEG C of cold water is made in hot water lithium bromide refrigeration machine 6B,
Water pump 6C through afterheat boiler system is sent to cooling supply pipe-line system 7.12 DEG C of the water returned from cooling supply pipe-line system 7 is delivered to heat
Freeze in water type lithium bromide refrigerator 6B, forms circulation.
As shown in figure 4, being cooling supply pipe-line system 7.From LNG cold energy use system 3 and exhaust-heat boiler flue gas utilizing waste heat for refrigeration system
5 DEG C of cold water made from system 6 imports in the first water storage tank 7A, and the water pump 7E through cooling supply pipe-line system, is supplied to by what is laid
Respectively each colod-application family is delivered to the pipeline 7C at colod-application family.12 DEG C of water after being heated up with the heat exchange of colod-application family, through each with colod-application family
The pipeline 7D of return is back in the second water storage tank 7B, then be delivered to respectively LNG cold energy use system 3 and with waste heat boiler cigarette
Gas utilizing waste heat for refrigeration system 6 carries out refrigeration cool-down, forms circulation.
When the semen donors of LNG cold energy use system 3 are unable to satisfy cooling needs, exhaust-heat boiler flue gas utilizing waste heat for refrigeration is opened
System 6 is freezed, to meet cooling needs；When the semen donors of LNG cold energy use system 3 are more than cooling needs, then close
Exhaust-heat boiler flue gas utilizing waste heat for refrigeration system 6 is used only LNG cold energy use system 3 and carries out cooling supply；When power plant without using LNG but
When using only pipe natural gas as fuel, then cooling supply is carried out using exhaust-heat boiler flue gas utilizing waste heat for refrigeration system 6.
Claims (6)
1. the simultaneous cold supply system of a kind of LNG cold energy and waste heat boiler utilizing waste heat for refrigeration, which is characterized in that including LNG gasification system,
LNG cold energy use system (3), exhaust-heat boiler flue gas utilizing waste heat for refrigeration system (6) and cooling supply pipe-line system (7)；Wherein,
LNG gasification system is arranged in LNG storage tank (1) side, uses parallel way docking, including height with LNG cold energy use system (3)
It presses water bath type gasifier (2), when LNG cold energy use, part LNG enters in high pressure water bath type gasifier (2) after gasification, as
Fuel enters in gas turbine (5)；
LNG cold energy use system (3) recycles the cold energy of LNG gasification by two-stage heat-exchange system, and the part cold energy is used to make
5 DEG C of cold water is obtained, and is delivered to cooling supply pipe-line system (7)；12 DEG C of the water returned from cooling supply pipe-line system (7), is back to LNG
Cold energy use system (3) forms circulation；
Exhaust-heat boiler flue gas utilizing waste heat for refrigeration system (6) is for being made 5 DEG C of cold water and being delivered to cooling supply pipe-line system (7)；
Cooling supply pipe-line system (7) from LNG cold energy use system (3) and exhaust-heat boiler flue gas utilizing waste heat for refrigeration system (6) for that will come
5 DEG C of cold water through pipeline to each with colod-application family, from 12 DEG C of water after the heat exchange heating of colod-application family, distribute cold to LNG
System (3) and exhaust-heat boiler flue gas utilizing waste heat for refrigeration system (6) can be utilized, circulation is formed.
2. the simultaneous cold supply system of a kind of LNG cold energy and waste heat boiler utilizing waste heat for refrigeration according to claim 1, feature exist
In, LNG cold energy use system (3) include two-stage heat-exchange system, it is cold in the coolant storage tank (3A) of level-one heat-exchange system when work
Matchmaker enters in the heat exchanger (3B) of level-one heat-exchange system and after LNG heat exchange, cooling, by the refrigerant pump of level-one heat-exchange system
(3C) is re-fed into the heat exchanger (3D) of secondary heat exchange system；LNG after heat exchange, heating enters heating in auxiliary heating apparatus (4), then
Enter in gas turbine (5) as fuel；12 DEG C of water enter secondary heat exchange system in the water storage tank (3F) of secondary heat exchange system
Heat exchanger (3D) and refrigerant exchange heat, and after being cooled to 5 DEG C of cold water, the water pump (3E) through secondary heat exchange system enters cooling supply pipeline system
It unites (7)；In the water storage tank (3F) that 12 DEG C of the water returned from cooling supply pipe-line system (7) is delivered to secondary heat exchange system, enter back into
Heat exchange cooling in the heat exchanger (3D) of secondary heat exchange system, forms refrigeration cycle.
3. the simultaneous cold supply system of a kind of LNG cold energy and waste heat boiler utilizing waste heat for refrigeration according to claim 1, feature exist
In exhaust-heat boiler flue gas utilizing waste heat for refrigeration system (6) includes waste heat boiler condensation water heater (6A), hot water lithium bromide refrigeration machine
The water pump (6C) of (6B) and afterheat boiler system, when work, the waste heat boiler condensation water heater in exhaust-heat boiler flue gas exit
The hot water that the exit of (6A) is drawn is sent into hot water lithium bromide refrigeration machine (6B), and waste heat boiler condensed water is back to after heat exchange
The entrance of heater (6A), its remaining hot water in the exit of condensation water heater (6A) then enter except oxygen evaporator (9) and remove
In oxygen drum (8), it is heated to be saturated vapor；5 DEG C of cold water is made in hot water lithium bromide refrigeration machine (6B), through waste heat boiler system
The water pump (6C) of system is sent to cooling supply pipe-line system (7)；12 DEG C of the water returned from cooling supply pipe-line system (7) is delivered to hot-water type bromine
Change refrigeration in lithium refrigeration machine (6B), forms circulation.
4. the simultaneous cold supply system of a kind of LNG cold energy and waste heat boiler utilizing waste heat for refrigeration according to claim 1, feature exist
In cooling supply pipe-line system (7) includes the water pump of the first water storage tank (7A), the second water storage tank (7B) and cooling supply pipe-line system
(7E), when work, 5 DEG C of the cold water made from the LNG cold energy use system (3) and exhaust-heat boiler flue gas utilizing waste heat for refrigeration system (6)
It imports in the first water storage tank (7A), and the water pump (7E) through cooling supply pipe-line system, is supplied to each pipe with colod-application family by what is laid
Road (7C) is delivered to each colod-application family；12 DEG C of water after being heated up with the heat exchange of colod-application family, through each pipeline returned with colod-application family
(7D) is back in the second water storage tank (7B), then be delivered to respectively LNG cold energy use system (3) and with exhaust-heat boiler flue gas more than
Refrigeration heat system (6) carries out refrigeration cool-down, forms circulation.
5. the simultaneous cold supply system of a kind of LNG cold energy and waste heat boiler utilizing waste heat for refrigeration according to claim 1, feature exist
In, when the semen donors of LNG cold energy use system (3) are unable to satisfy cooling needs, unlatching exhaust-heat boiler flue gas utilizing waste heat for refrigeration system
System (6) freezes, to meet cooling needs；When the semen donors of LNG cold energy use system (3) are more than cooling needs, then close
Exhaust-heat boiler flue gas utilizing waste heat for refrigeration system (6) is closed, LNG cold energy use system (3) is used only and carries out cooling supply.
6. the simultaneous cold supply system of a kind of LNG cold energy and waste heat boiler utilizing waste heat for refrigeration according to claim 1, feature exist
In when power plant is without using LNG but when pipe natural gas is used only as fuel, then using exhaust-heat boiler flue gas utilizing waste heat for refrigeration system
System (6) carries out cooling supply.
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Cited By (1)
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| CN110285636B (en) | 2024-05-14 |
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