CN105756732A - LNG (Liquefied Natural Gas)/liquid oxygen direct combustion mixed working medium power cycle generation device - Google Patents
LNG (Liquefied Natural Gas)/liquid oxygen direct combustion mixed working medium power cycle generation device Download PDFInfo
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- CN105756732A CN105756732A CN201610144314.8A CN201610144314A CN105756732A CN 105756732 A CN105756732 A CN 105756732A CN 201610144314 A CN201610144314 A CN 201610144314A CN 105756732 A CN105756732 A CN 105756732A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 216
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 239000003949 liquefied natural gas Substances 0.000 title abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000006835 compression Effects 0.000 claims description 100
- 238000007906 compression Methods 0.000 claims description 100
- 230000008676 import Effects 0.000 claims description 34
- 239000007789 gas Substances 0.000 claims description 27
- 238000000605 extraction Methods 0.000 claims description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 15
- 239000001301 oxygen Substances 0.000 claims description 15
- 229910052760 oxygen Inorganic materials 0.000 claims description 15
- 230000008602 contraction Effects 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 abstract description 8
- 238000010248 power generation Methods 0.000 abstract description 3
- 238000011217 control strategy Methods 0.000 abstract description 2
- 230000001172 regenerating effect Effects 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 74
- 229910002092 carbon dioxide Inorganic materials 0.000 description 38
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K21/00—Steam engine plants not otherwise provided for
- F01K21/04—Steam engine plants not otherwise provided for using mixtures of steam and gas; Plants generating or heating steam by bringing water or steam into direct contact with hot gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1853—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines coming in direct contact with water in bulk or in sprays
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- 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
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0027—Oxides of carbon, e.g. CO2
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
Abstract
The invention provides an LNG (Liquefied Natural Gas)/liquid oxygen direct combustion mixed working medium power cycle generation device. The device is composed of an acting subsystem, a regenerative cycle subsystem, and an LNG and liquid oxygen supply and CO2 capturing subsystem; a high-pressure combustion room set and a reheat combustion chamber set are used for replacing a boiler and a re-heater; a LNG/liquid oxygen high-pressure and high-temperature combustion product is mixed with supplied water to generate H2O/CO2 mixed steam for realizing expansion power generation in a turbine set; and after a mixed working medium steam exhaust is condensed in a condenser to separate moisture, CO2 is pre-cooled and pressurized and then is liquefied. Inlet pressure and temperature of a turbine working medium are relatively high, a control strategy of a load of a combustion adjuster set is adopted and a low-pressure turbine is disconnected and operated at an off-peak power period, so that the efficiency of the set can be greatly improved; and therefore, functions of large-scale energy storage, zero emission of CO2 and NOx, high efficiency, peak adjustment and the like are realized.
Description
Technical field
The present invention relates to a kind of TRT, especially a kind of LNG/ liquid oxygen direct combustion Mixed working fluid cycle TRT.
Background technology
Scale energy storage has become as following intelligent grid balanced load, abatement peak load fluctuation, the guarantee reliable key link of power system security in ebb of dissolving nuclear power more than needed and intermittent new forms of energy networking such as receiving wind-powered electricity generation, solar electrical energy generation etc..But hydroenergy storage station is restricted by geographic factor, other energy storage methods all have problems in economy.Liquefied natural gas is the main fuel of peaking generation because being readily transported and storing, and gas peak regulation generating and scale energy storage will be electrical network peak valley balance, stablize the Main Means of operation of power networks.Greenhouse gas emission based on CO2 and the climate change that brings are subject to the common concern in the whole world with environmental problem.Within 2008, International Energy Agency proposes, and CO2 trapping is the necessary technology solving climate change problem with Plugging Technology Applied (CCS), should be actively pushed forward.Wherein CO2 trapping is the CCS primary sport technique segment implemented.Existing CO2 traps scheme and mainly combustion product is processed, and there is the problem that trapping process energy resource consumption cost is too big.
Summary of the invention
It is an object of the present invention to provide a kind of mixing with cycle fluid by combustion product as working medium, there is the power cycle TRT of the features such as high density scale energy storage, zero carbon row, zero discharged nitrous oxides, efficient, peak regulation.
The present invention adopts the following technical scheme that for achieving the above object
A kind of LNG/ liquid oxygen direct combustion Mixed working fluid cycle TRT, supplies including work done subsystem, extraction cycle subsystem and LNG and liquid oxygen and traps subsystem with CO2, wherein,
Described work done subsystem includes high compression combustion chamber group, reheat combustion chamber group, high pressure turbine, intermediate pressure turbine, low pressure turbine, electromotor A, electromotor B and valve group；Described work done subsystem adopts H2O/CO2 mixed working fluid as working medium；Described high compression combustion chamber component is 4 groups, corresponds respectively to 4 air chambers of high pressure turbine, and each high compression combustion chamber group includes at least a high compression combustion chamber；Described high compression combustion chamber is made up of high compression combustion chamber cylinder, high compression combustion chamber burner, high compression combustion chamber burner inner liner, high compression combustion chamber helical baffles group, high compression combustion chamber annular endplate, high compression combustion chamber atomizer group, high compression combustion chamber first member plate, high compression combustion chamber water inlet adapter, high compression combustion chamber contraction section and discharge connection；Described high compression combustion chamber helical baffles group annular space between high compression combustion chamber cylinder and high compression combustion chamber burner inner liner forms the helical duct that cross-sectional flow area is gradually increased；Described high compression combustion chamber burner is provided with high compression combustion chamber Imported gas and high compression combustion chamber oxygen inlet；Described reheat combustion chamber group number of packet is identical with high pressure turbine air vent quantity, and often group reheat combustion chamber group at least includes 1 reheat combustion chamber；Described reheat combustion chamber is made up of reheat combustion chamber cylinder, reheat combustion chamber burner, reheat combustion chamber burner inner liner, reheat combustion chamber helical baffles group, reheat combustion chamber first member plate, reheat combustion chamber working medium entrance sleeve, reheat combustion chamber contraction section and discharge connection；Described reheat combustion chamber helical baffles group annular space between reheat combustion chamber cylinder and reheat combustion chamber burner inner liner forms the helical duct that cross-sectional flow area is gradually increased；Described reheat combustion chamber burner is provided with reheat combustion chamber Imported gas and reheat combustion chamber oxygen inlet；Described valve group includes high compression combustion chamber Imported gas valve group, high compression combustion chamber oxygen inlet valve group, high compression combustion chamber feed-water inlet valve group, high pressure turbine inlet valve group, reheat combustion chamber Imported gas valve group, reheat combustion chamber oxygen inlet valve group, intermediate pressure turbine inlet valve group, intermediate pressure turbine extraction valve A, intermediate pressure turbine outlet bypass valve group and low pressure turbine inlet valve group；The high compression combustion chamber contraction section of each high compression combustion chamber and discharge connection connect 4 groups of air chambers of high pressure turbine by high pressure turbine inlet valve group, the outlet of high pressure turbine is connected with each reheat combustion chamber working medium entrance sleeve of reheat combustion chamber group respectively, and the reheat combustion chamber contraction section of each reheat combustion chamber of reheat combustion chamber group and discharge connection are connected with the import of intermediate pressure turbine by intermediate pressure turbine inlet valve group；
Described extraction cycle subsystem includes condenser, low-pressure heater group, high-pressure heater group, condensate pump, feed pump and drain valve；Condenser cooling water side includes water inlet and outlet, and condenser is condensed water out and is connected with low-pressure heater group import by condensate pump, and the outlet of low-pressure heater group is connected with high-pressure heater group import by feed pump；The outlet of high-pressure heater group is connected with high compression combustion chamber water inlet adapter by high compression combustion chamber feed-water inlet valve group；The import of described drain valve is connected with condensate pump outlet line；
Described LNG and liquid oxygen supply trap subsystem with CO2 and include LNG storage tank, liquid oxygen storage tank, LNG pump, liquid oxygen pump, CO2 compressor, heat exchanger A, heat exchanger B, heat exchanger C and heat exchanger D；LNG storage tank outlet is connected with the LNG side-entrance of heat exchanger A by LNG pump, the LNG side outlet of heat exchanger A is connected with the LNG import of heat exchanger D, and the outlet of the LNG of heat exchanger D is connected with each high compression combustion chamber Imported gas respectively through high compression combustion chamber Imported gas valve group and is connected with each reheat combustion chamber Imported gas by reheat combustion chamber Imported gas valve group；Liquid oxygen storage tank outlet is connected with the liquid oxygen import of heat exchanger B by liquid oxygen pump, the liquid oxygen outlet of heat exchanger B is connected with the liquid oxygen side-entrance of heat exchanger D, and the liquid oxygen side outlet of heat exchanger D is connected with each high compression combustion chamber liquid oxygen import respectively through high compression combustion chamber liquid oxygen inlet valve group and is connected with each reheat combustion chamber liquid oxygen import by reheat combustion chamber liquid oxygen inlet valve group；The CO2 side-entrance of heat exchanger A is located on the housing of more than condenser liquid level, the CO2 side outlet of heat exchanger A is connected with the CO2 import of heat exchanger B by CO2 compressor, the CO2 outlet of heat exchanger B is connected with the CO2 import of heat exchanger C, and heat exchanger C includes CO2 outlet；
Intermediate pressure turbine first order extraction opening is connected by the superheated steam air intake of intermediate pressure turbine extraction valve A and heat exchanger D, and the steam inlet with the high-pressure heater of high-pressure heater group is connected by the superheated steam venthole of heat exchanger D；The lower steam drain of intermediate pressure turbine exports bypass valve group by intermediate pressure turbine and is connected with condenser air intake B, and the upper steam drain of intermediate pressure turbine is connected with low pressure turbine import by low pressure turbine inlet valve group；The outlet of low pressure turbine is connected with condenser air intake A；High pressure turbine, low pressure turbine each extraction opening with each extraction opening of intermediate pressure turbine all respectively corresponding with each steam inlet of high-pressure heater group and low-pressure heater group connect.
Further, high pressure turbine and intermediate pressure turbine are used for driving electromotor A, and low pressure turbine is used for driving electromotor B.
Further, what the CO2 outlet of described heat exchanger C was flowed out is CO2 liquid.
Compared with prior art, present invention have the advantage that
1. meet the needs of electrical network scale energy storage.The required liquid oxygen of LNG generating produces in the electric-net valley-electricity period and stores, and storage space is little, and energy storage facility investment can be greatly reduced.According to preresearch estimates, oxygen energy storage wasted work substantially accounts for the 25%～35% of unit generation amount；The thermal efficiency of cycle of generating set then can reach 60%～65%.Due to oxygen consumption is paddy electricity, and the cycle efficieny of its generating set and economic benefit are far above conventional power generation usage scheme.
2. the trapping process of carbon dioxide is to complete in conjunction with the condensation process of turbine exhaust steam, and system is simpler.LNG/ liquid oxygen direct combustion feedwater Mixed working fluid cycle adopts liquid oxygen to substitute compression air, makes LNG/ liquid oxygen high pressure-temperature combustion product and feedwater mixing produce H2O/CO2Mixed vapour is expansion power generation in turbine set, after mixed working fluid exhaust steam condenses separation moisture within the condenser, the part liquid nitrogen liquefaction that carbon dioxide successively utilizes LNG and the pre-cold-peace compressor of liquid oxygen to boost and utilizes air separation unit to produce, thus the full trapping realizing carbon dioxide is sealed up for safekeeping or be can be used for other and utilizes occasion.Owing to combustion product is as working medium, it is possible to expand near ambient temperature in turbine, it is thus eliminated that flue gas loss, and pure oxygen burning avoids the generation of NOx, has excellent environmental benefit.
3. adopt the control strategy with the combustion control power of the assembling unit, blocking packet is adopted to regulate by high compression combustion chamber and high pressure turbine air chamber, owing to combustor designs by multiple combustor moduleization, the combustor start and stop regulation and control of the present invention are compared boiler and are had very strong convenience, thus it is possible to vary put into operation quantity and the fuel quantity of combustor are to realize the adjustment of unit load.
4. consider from the material thickness of the turbine high pressure cylinder needed for 30MPa in peak load regulation; as gas turbine, dead halt peak regulation is likely to be unfavorable for its service life; therefore adopt the operating scheme of turbine low pressure (LP) cylinder off-the-line relatively low for operating temperature; utilize intermediate pressure cylinder steam drain to the by-pass line steam discharge of condenser, unit greater efficiency at low load can be realized under the premise of support equipment safety and run.When turbine low pressure (LP) cylinder off-the-line is run, reheat combustion chamber need not put into operation, and reheat combustion chamber is only used as passage.
5. thermal efficiency of cycle is higher.Except the above-mentioned measure being of value to thermal efficiency of cycle raising, also have benefited from combustor few more than boiler in material consumption, have ready conditions and use exotic material costly, so the inlet pressure of the operational factor of apparatus of the present invention and turbine working medium and temperature are higher；In addition during sub-load, unit also has higher efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the embodiment of the present invention；
Fig. 2 is the high compression combustion chamber schematic diagram of the embodiment of the present invention；
Fig. 3 is the reheat combustion chamber schematic diagram of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with Fig. 1, technical scheme is described in detail:
Embodiment:
A kind of LNG/ liquid oxygen direct combustion Mixed working fluid cycle TRT, it is characterised in that include work done subsystem, extraction cycle subsystem and LNG and liquid oxygen supply traps subsystem with CO2, wherein,
Described work done subsystem includes high compression combustion chamber group 1-1, reheat combustion chamber group 1-2, high pressure turbine 1-3, intermediate pressure turbine 1-4, low pressure turbine 1-5, electromotor A1-6, electromotor B1-7 and valve group 1-8；Described work done subsystem adopts H2O/CO2 mixed working fluid as working medium；Described high compression combustion chamber group 1-1 is divided into 4 groups, corresponds respectively to 4 air chambers of high pressure turbine 1-3, and each high compression combustion chamber group 1-1 includes at least a high compression combustion chamber 1-1-1；Described high compression combustion chamber 1-1-1 is made up of high compression combustion chamber cylinder 1-1-1-1, high compression combustion chamber burner 1-1-1-2, high compression combustion chamber burner inner liner 1-1-1-3, high compression combustion chamber helical baffles group 1-1-1-4, high compression combustion chamber annular endplate 1-1-1-5, high compression combustion chamber atomizer group 1-1-1-6, high compression combustion chamber first member plate 1-1-1-7, high compression combustion chamber water inlet adapter 1-1-1-8, high compression combustion chamber contraction section and discharge connection 1-1-1-9；Described high compression combustion chamber helical baffles group 1-1-1-4 annular space between high compression combustion chamber cylinder 1-1-1-1 and high compression combustion chamber burner inner liner 1-1-1-3 forms the helical duct that cross-sectional flow area is gradually increased；Described high compression combustion chamber burner 1-1-1-2 is provided with high compression combustion chamber Imported gas 1-1-1-10 and high compression combustion chamber oxygen inlet 1-1-1-11；Described reheat combustion chamber group 1-2 number of packet is identical with high pressure turbine air vent quantity, and often group reheat combustion chamber group 1-2 at least includes 1 reheat combustion chamber 1-2-1；Described reheat combustion chamber 1-2-1 is made up of reheat combustion chamber cylinder 1-2-1-1, reheat combustion chamber burner 1-2-1-2, reheat combustion chamber burner inner liner 1-2-1-3, reheat combustion chamber helical baffles group 1-2-1-4, reheat combustion chamber first member plate 1-2-1-7, reheat combustion chamber working medium entrance sleeve 1-2-1-8, reheat combustion chamber contraction section and discharge connection 1-2-1-9；Described reheat combustion chamber helical baffles group 1-2-1-4 annular space between reheat combustion chamber cylinder 1-2-1-1 and reheat combustion chamber burner inner liner 1-2-1-3 forms the helical duct that cross-sectional flow area is gradually increased；Described reheat combustion chamber burner 1-2-1-2 is provided with reheat combustion chamber Imported gas 1-2-1-10 and reheat combustion chamber oxygen inlet 1-2-1-11；Described valve group 1-8 includes high compression combustion chamber Imported gas valve group 1-8-1, high compression combustion chamber oxygen inlet valve group 1-8-2, high compression combustion chamber feed-water inlet valve group 1-8-3, high pressure turbine inlet valve group 1-8-4, reheat combustion chamber Imported gas valve group 1-8-5, reheat combustion chamber oxygen inlet valve group 1-8-6, intermediate pressure turbine inlet valve group 1-8-7, intermediate pressure turbine extraction valve A1-8-8, intermediate pressure turbine outlet bypass valve group 1-8-9 and low pressure turbine inlet valve group 1-8-10；The high compression combustion chamber contraction section of each high compression combustion chamber 1-1-1 and discharge connection 1-1-1-9 connect 4 groups of air chambers of high pressure turbine 1-3 by high pressure turbine inlet valve group 1-8-4, the outlet of high pressure turbine is connected with each reheat combustion chamber working medium entrance sleeve 1-2-1-8 of reheat combustion chamber group 1-2 respectively, and reheat combustion chamber contraction section and the discharge connection 1-2-1-9 of each reheat combustion chamber 1-2-1 of reheat combustion chamber group 1-2 are connected by the import of intermediate pressure turbine inlet valve group 1-8-7 and intermediate pressure turbine 1-4；
Described extraction cycle subsystem includes condenser 2-1, low-pressure heater group 2-2, high-pressure heater group 2-3, condensate pump 2-4, feed pump 2-5 and drain valve 2-6；Condenser 2-1 cooling water side includes water inlet 2-1-1 and outlet 2-1-2, condenser is condensed water out 2-1-4 and is connected with low-pressure heater group 2-2 import by condensate pump 2-4, and low-pressure heater group 2-2 outlet is connected with high-pressure heater group 2-3 import by feed pump 2-5；High-pressure heater group 2-3 outlet is connected with high compression combustion chamber water inlet adapter 1-1-1-8 by high compression combustion chamber feed-water inlet valve group 1-8-3；The import of described drain valve 2-6 is connected with condensate pump 2-4 outlet line；
Described LNG and liquid oxygen supply trap subsystem with CO2 and include LNG storage tank 3-1, liquid oxygen storage tank 3-2, LNG pump 3-3, liquid oxygen pump 3-4, CO2 compressor 3-5, heat exchanger A3-6, heat exchanger B3-7, heat exchanger C3-8 and heat exchanger D3-9；LNG storage tank 3-1 outlet is connected by the LNG side-entrance 3-6-1 of LNG pump 3-3 and heat exchanger A, the LNG import 3-9-1 of LNG side outlet 3-6-2 and the heat exchanger D of heat exchanger A is connected, and the outlet 3-9-2 of the LNG of heat exchanger D is connected with each high compression combustion chamber Imported gas 1-1-1-10 respectively through high compression combustion chamber Imported gas valve group 1-8-1 and is connected with each reheat combustion chamber Imported gas 1-2-1-10 by reheat combustion chamber Imported gas valve group 1-8-5；Liquid oxygen storage tank 3-2 outlet is connected by the liquid oxygen import 3-7-1 of liquid oxygen pump 3-4 and heat exchanger B, the liquid oxygen side-entrance 3-9-3 of liquid oxygen outlet 3-7-2 and the heat exchanger D of heat exchanger B is connected, and the liquid oxygen side outlet 3-9-4 of heat exchanger D is connected with each high compression combustion chamber liquid oxygen import 1-1-1-11 respectively through high compression combustion chamber liquid oxygen inlet valve group 1-8-2 and is connected with each reheat combustion chamber liquid oxygen import 1-2-1-11 by reheat combustion chamber liquid oxygen inlet valve group 1-8-6；The CO2 side-entrance 3-6-3 of heat exchanger A is located on the housing of more than condenser 2-1 liquid level, the CO2 side outlet 3-6-4 of heat exchanger A is connected by the CO2 import 3-7-3 of CO2 compressor 3-5 and heat exchanger B, the CO2 of heat exchanger B exports the CO2 import 3-8-3 of 3-7-4 and heat exchanger C and is connected, and heat exchanger C includes CO2 and exports 3-8-4；
Intermediate pressure turbine first order extraction opening is connected by the superheated steam air intake 3-9-5 of intermediate pressure turbine extraction valve A1-8-8 and heat exchanger D3-9, and the steam inlet with certain high-pressure heater of high-pressure heater group 2-3 is connected by the superheated steam venthole 3-9-6 of heat exchanger D；The lower steam drain of intermediate pressure turbine exports bypass valve group 1-8-9 by intermediate pressure turbine and is connected with condenser air intake B2-1-5, and the upper steam drain of intermediate pressure turbine is connected with low pressure turbine 1-5 import by low pressure turbine inlet valve group 1-8-10；The outlet of low pressure turbine 1-5 is connected with condenser air intake A2-1-3；High pressure turbine, each extraction opening of low pressure turbine and other each extraction openings of intermediate pressure turbine are corresponding with each steam inlet of high-pressure heater group 2-3 and low-pressure heater group 2-2 all respectively to be connected.
Reasonable, the high pressure turbine 1-3 and intermediate pressure turbine 1-4 of described a kind of LNG/ liquid oxygen direct combustion Mixed working fluid cycle TRT are used for driving electromotor A1-6, low pressure turbine 1-5 to be used for driving electromotor B1-7.What the CO2 of described heat exchanger C exported 3-8-4 outflow is CO2 liquid.
The workflow of the present invention is as follows:
Running air-separating plant in the paddy electricity period and prepare liquid oxygen and liquid nitrogen, the sub-load (about 20%) pressing low pressure turbine 1-5 off-the-line at non-peak electricity period generating set is run；Put into operation at the peak electricity whole turbine of period generating set；When generating set runs, LNG/ liquid oxygen burns in high compression combustion chamber group 1-1 and heats mixing feedwater, produces H2O/CO2 mixed vapour, and segmentation expansion working generating in turbine, expansion process arranges an afterburning reheating；When turbine low pressure (LP) cylinder off-the-line is run, reheat combustion chamber need not put into operation, and reheat combustion chamber is only used as passage.Turbine exhaust steam condenses in condenser 2-1, and is separated with CO2 by moisture, and major part condenses water and flows back to high compression combustion chamber group through water supply heat back system circulation, and the part H2O corresponding with combustion product quantity then discharges system by drain valve 2-6.Gaseous state CO2 is arranged in the heat exchanger A3-6 on condenser shell by LNG pre-cooling by import, compressor 3-5 is cooled by liquid oxygen further after boosting in heat exchanger B3-7, then utilizes the part liquid nitrogen that air separation unit produces to be liquefied by CO2 in heat exchanger C3-8.For making natural gas and oxygen respectively reach combustor inlet parameter, each combustor it is flow to again after the superheated steam section the drawn gas heating both drawn from intermediate pressure cylinder in heat exchanger D3-9, superheated steam pressure herein is relatively low but the degree of superheat is relatively big, directly heats feedwater and uneconomical.High compression combustion chamber 1-1-1 arranges burner inner liner, in burner inner liner, natural gas surely fires generation High Temperature High Pressure mixed vapour with oxygen, annular space outside high compression combustion chamber burner inner liner injects high-pressure feed water (being cold reheating mixed vapour for reheat combustion chamber), on the one hand combustion chamber flame drum is cooled down, self heat absorption evaporation on the other hand, steam water interface is at flame zone outlet spraying and combustion product contact heat transfer, pressure by mixed working fluid steam, temperature adjusts in the safe operation confinement of equipment, then high pressure turbine is sequentially entered, reheat combustion chamber, expansion working and single reheat in intermediate pressure turbine and low pressure turbine；When the operation at part load of low pressure turbine off-the-line pressed by non-peak electricity period generating set, low pressure turbine inlet valve group 1-8-10 closes, and intermediate pressure turbine outlet bypass valve group 1-8-9 opens, and mixed vapour exhaust steam is directly entered condenser 2-1.
Claims (3)
1. a LNG/ liquid oxygen direct combustion Mixed working fluid cycle TRT, it is characterised in that include work done subsystem, extraction cycle subsystem and LNG and liquid oxygen supply traps subsystem with CO2, wherein,
Described work done subsystem includes high compression combustion chamber group (1-1), reheat combustion chamber group (1-2), high pressure turbine (1-3), intermediate pressure turbine (1-4), low pressure turbine (1-5), electromotor A (1-6), electromotor B (1-7) and valve group (1-8)；Described work done subsystem adopts H2O/CO2 mixed working fluid as working medium；Described high compression combustion chamber group (1-1) is divided into 4 groups, corresponds respectively to 4 air chambers of high pressure turbine (1-3), and each high compression combustion chamber group (1-1) is including at least a high compression combustion chamber (1-1-1)；Described high compression combustion chamber (1-1-1) is by high compression combustion chamber cylinder (1-1-1-1), high compression combustion chamber burner (1-1-1-2), high compression combustion chamber burner inner liner (1-1-1-3), high compression combustion chamber helical baffles group (1-1-1-4), high compression combustion chamber annular endplate (1-1-1-5), high compression combustion chamber atomizer group (1-1-1-6), high compression combustion chamber first member plate (1-1-1-7), high compression combustion chamber water inlet adapter (1-1-1-8), high compression combustion chamber contraction section and discharge connection (1-1-1-9) composition；Described high compression combustion chamber helical baffles group (1-1-1-4) annular space between high compression combustion chamber cylinder (1-1-1-1) and high compression combustion chamber burner inner liner (1-1-1-3) forms the helical duct that cross-sectional flow area is gradually increased；Described high compression combustion chamber burner (1-1-1-2) is provided with high compression combustion chamber Imported gas (1-1-1-10) and high compression combustion chamber oxygen inlet (1-1-1-11)；Described reheat combustion chamber group (1-2) number of packet is identical with high pressure turbine air vent quantity, and often group reheat combustion chamber group (1-2) at least includes 1 reheat combustion chamber (1-2-1)；Described reheat combustion chamber (1-2-1) is made up of reheat combustion chamber cylinder (1-2-1-1), reheat combustion chamber burner (1-2-1-2), reheat combustion chamber burner inner liner (1-2-1-3), reheat combustion chamber helical baffles group (1-2-1-4), reheat combustion chamber first member plate (1-2-1-7), reheat combustion chamber working medium entrance sleeve (1-2-1-8), reheat combustion chamber contraction section and discharge connection (1-2-1-9)；Described reheat combustion chamber helical baffles group (1-2-1-4) annular space between reheat combustion chamber cylinder (1-2-1-1) and reheat combustion chamber burner inner liner (1-2-1-3) forms the helical duct that cross-sectional flow area is gradually increased；Described reheat combustion chamber burner (1-2-1-2) is provided with reheat combustion chamber Imported gas (1-2-1-10) and reheat combustion chamber oxygen inlet (1-2-1-11)；Described valve group (1-8) includes high compression combustion chamber Imported gas valve group (1-8-1), high compression combustion chamber oxygen inlet valve group (1-8-2), high compression combustion chamber feed-water inlet valve group (1-8-3), high pressure turbine inlet valve group (1-8-4), reheat combustion chamber Imported gas valve group (1-8-5), reheat combustion chamber oxygen inlet valve group (1-8-6), intermediate pressure turbine inlet valve group (1-8-7), intermediate pressure turbine extraction valve A (1-8-8), intermediate pressure turbine outlet bypass valve group (1-8-9) and low pressure turbine inlet valve group (1-8-10)；The high compression combustion chamber contraction section of each high compression combustion chamber (1-1-1) and discharge connection (1-1-1-9) connect 4 groups of air chambers of high pressure turbine (1-3) by high pressure turbine inlet valve group (1-8-4), the outlet of high pressure turbine is connected with each reheat combustion chamber working medium entrance sleeve (1-2-1-8) of reheat combustion chamber group (1-2) respectively, and reheat combustion chamber contraction section and the discharge connection (1-2-1-9) of each reheat combustion chamber (1-2-1) of reheat combustion chamber group (1-2) are connected by the import of intermediate pressure turbine inlet valve group (1-8-7) with intermediate pressure turbine (1-4)；
Described extraction cycle subsystem includes condenser (2-1), low-pressure heater group (2-2), high-pressure heater group (2-3), condensate pump (2-4), feed pump (2-5) and drain valve (2-6)；Condenser (2-1) cooling water side includes water inlet (2-1-1) and outlet (2-1-2), condenser is condensed water out (2-1-4) and is connected with low-pressure heater group (2-2) import by condensate pump (2-4), and low-pressure heater group (2-2) outlet is connected with high-pressure heater group (2-3) import by feed pump (2-5)；High-pressure heater group (2-3) outlet is connected with high compression combustion chamber water inlet adapter (1-1-1-8) by high compression combustion chamber feed-water inlet valve group (1-8-3)；The import of described drain valve (2-6) is connected with condensate pump (2-4) outlet line；
Described LNG and liquid oxygen supply trap subsystem with CO2 and include LNG storage tank (3-1), liquid oxygen storage tank (3-2), LNG pump (3-3), liquid oxygen pump (3-4), CO2 compressor (3-5), heat exchanger A (3-6), heat exchanger B (3-7), heat exchanger C (3-8) and heat exchanger D (3-9)；LNG storage tank (3-1) outlet is connected with the LNG side-entrance (3-6-1) of heat exchanger A by LNG pump (3-3), the LNG side outlet (3-6-2) of heat exchanger A is connected with the LNG import (3-9-1) of heat exchanger D, and the outlet (3-9-2) of the LNG of heat exchanger D is connected with each high compression combustion chamber Imported gas (1-1-1-10) respectively through high compression combustion chamber Imported gas valve group (1-8-1) and is connected with each reheat combustion chamber Imported gas (1-2-1-10) by reheat combustion chamber Imported gas valve group (1-8-5)；Liquid oxygen storage tank (3-2) outlet is connected with the liquid oxygen import (3-7-1) of heat exchanger B by liquid oxygen pump (1-4), liquid oxygen outlet (3-7-2) of heat exchanger B is connected with the liquid oxygen side-entrance (3-9-3) of heat exchanger D, and the liquid oxygen side outlet (3-9-4) of heat exchanger D is connected with each high compression combustion chamber liquid oxygen import (1-1-1-11) respectively through high compression combustion chamber liquid oxygen inlet valve group (1-8-2) and is connected with each reheat combustion chamber liquid oxygen import (1-2-1-11) by reheat combustion chamber liquid oxygen inlet valve group (1-8-6)；The CO2 side-entrance (3-6-3) of heat exchanger A is located on the housing of more than condenser (2-1) liquid level, the CO2 side outlet (3-6-4) of heat exchanger A is connected with the CO2 import (3-7-3) of heat exchanger B by CO2 compressor (3-5), CO2 outlet (3-7-4) of heat exchanger B is connected with the CO2 import (3-8-3) of heat exchanger C, and heat exchanger C includes CO2 outlet (3-8-4)；
Intermediate pressure turbine first order extraction opening is connected with the superheated steam air intake (3-9-5) of heat exchanger D (3-9) by intermediate pressure turbine extraction valve A (1-8-8), and the steam inlet with the high-pressure heater of high-pressure heater group (2-3) is connected by the superheated steam venthole (3-9-6) of heat exchanger D；The lower steam drain of intermediate pressure turbine is connected with condenser air intake B (2-1-5) by intermediate pressure turbine outlet bypass valve group (1-8-9), and the upper steam drain of intermediate pressure turbine is connected with low pressure turbine (1-5) import by low pressure turbine inlet valve group (1-8-10)；The outlet of low pressure turbine (1-5) is connected with condenser air intake A (2-1-3)；High pressure turbine, low pressure turbine each extraction opening with each extraction opening of intermediate pressure turbine respectively corresponding with each steam inlet of high-pressure heater group (2-3) and low-pressure heater group (2-2) connect.
2. a kind of LNG/ liquid oxygen direct combustion Mixed working fluid cycle TRT according to claim 2, it is characterized in that, high pressure turbine (1-3) and intermediate pressure turbine (1-4) are used for driving electromotor A (1-6), low pressure turbine (1-5) to be used for driving electromotor B (1-7).
3. a kind of LNG/ liquid oxygen direct combustion Mixed working fluid cycle TRT according to claim 2, it is characterised in that what CO2 outlet (3-8-4) of described heat exchanger C flowed out is CO2 liquid.
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| CN109854381A (en) * | 2019-02-19 | 2019-06-07 | 东南大学 | A kind of existing power plant CO2Trap the Mixed working fluid cycle electricity generation system of transformation |
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