CN105756732B - A kind of LNG/ liquid oxygen direct combustion Mixed working fluid cycle TRT - Google Patents

Abstract

A LNG/liquid oxygen direct combustion mixed working fluid power cycle power generation device is composed of a work subsystem, a heat recovery cycle subsystem, and an LNG and liquid oxygen supply and CO2 capture subsystem; a high-pressure combustor group and a reheat combustor A group replaces the boiler and reheater; LNG/liquid oxygen high-pressure high-temperature combustion products are mixed with feed water to generate H ₂ O/CO ₂ mixed steam, which is expanded in the turbine unit to generate electricity, and the exhaust steam of the mixed working medium is condensed in the condenser to separate water, CO2 is liquefied after being pre-cooled and pressurized. Due to the high inlet pressure and temperature of the turbine working fluid, the efficiency of the unit can be greatly improved by adopting the control strategy of combustion to adjust the load of the unit and decommissioning the low-pressure turbine during the valley power period; thus realizing large-scale energy storage and zero CO2 And NOx emission, high efficiency, peak shaving and other functions.

Description

A LNG/liquid oxygen direct combustion mixed working medium power cycle power generation device

technical field

The invention relates to a power generation device, in particular to an LNG/liquid oxygen direct combustion mixed working fluid power cycle power generation device.

Background technique

Large-scale energy storage has become a key link in the future smart grid to balance loads, reduce peak and valley load fluctuations, and ensure the safety and reliability of the power system in terms of consuming low-peak surplus nuclear power and accepting intermittent new energy such as wind power and solar power into the grid. However, pumped storage power plants are restricted by geographical factors, and other energy storage methods have problems in terms of economy. Liquefied natural gas is the main fuel for peak-shaving power generation because it is easy to transport and store. Gas peak-shaving power generation and large-scale energy storage will be the main means to balance the peak and valley of the power grid and stabilize the operation of the power grid. The emission of greenhouse gases, mainly CO2, and the resulting climate change and environmental problems have attracted worldwide attention. In 2008, the International Energy Agency proposed that CO2 capture and storage technology (CCS) is a necessary technology to solve the problem of climate change and should be actively promoted. Among them, CO2 capture is the primary technical link in the implementation of CCS. Existing CO2 capture schemes mainly deal with combustion products, and there is a problem that the cost of energy consumption in the capture process is too high.

Contents of the invention

The purpose of the present invention is to provide a power cycle power generation device which mixes combustion products and cycle working medium as working medium, and has the characteristics of high-density large-scale energy storage, zero carbon emission, zero nitrogen oxide emission, high efficiency, and peak regulation.

The present invention adopts following technical scheme for realizing above-mentioned object:

A LNG/liquid oxygen direct combustion mixed working medium power cycle power generation device, including a work subsystem, a heat recovery cycle subsystem, and a LNG and liquid oxygen supply and CO2 capture subsystem, wherein,

The working subsystem includes a high-pressure combustor group, a reheat combustor group, a high-pressure turbine, a medium-pressure turbine, a low-pressure turbine, a generator A, a generator B and a valve group; the working subsystem uses H2O /CO2 mixed working fluid as the working medium; the high-pressure combustion chamber components are divided into 4 groups, corresponding to the 4 steam inlet chambers of the high-pressure turbine, and each high-pressure combustion chamber group contains at least one high-pressure combustion chamber; the high-pressure combustion chamber The chamber consists of a high-pressure combustion chamber cylinder, a high-pressure combustion chamber burner, a high-pressure combustion chamber flame cylinder, a high-pressure combustion chamber spiral baffle group, a high-pressure combustion chamber annular end plate, a high-pressure combustion chamber atomizing nozzle group, a high-pressure combustion chamber left end plate, The high-pressure combustion chamber inlet pipe, the high-pressure combustion chamber contraction section and the outlet connection pipe are composed; the high-pressure combustion chamber spiral baffle group forms an annular space between the high-pressure combustion chamber cylinder body and the high-pressure combustion chamber flame cylinder, and the cross-sectional area of the flow gradually increases. Increased spiral channel; the high-pressure combustor burner is provided with a high-pressure combustor natural gas inlet and a high-pressure combustor oxygen inlet; The combustion chamber group includes at least one reheat combustion chamber; The reheat combustor left end plate, the reheat combustor working medium inlet connection pipe, the reheat combustion chamber contraction section and the outlet connection pipe; The annular space between the flame tubes forms a spiral channel with a gradually increasing cross-sectional area; the reheat combustor burner is provided with a reheat combustor natural gas inlet and a reheat combustor oxygen inlet; the valve group includes a high-pressure combustion chamber Chamber natural gas inlet valve group, high-pressure combustion chamber oxygen inlet valve group, high-pressure combustion chamber feed water inlet valve group, high-pressure turbine inlet valve group, reheat combustion chamber natural gas inlet valve group, reheat combustion chamber oxygen inlet valve group, medium pressure turbine Flat inlet valve group, medium-pressure turbine extraction valve A, medium-pressure turbine outlet bypass valve group and low-pressure turbine inlet valve group; the high-pressure combustion chamber contraction section and outlet connection of each high-pressure combustion chamber pass through the high-pressure turbine inlet valve 4 groups of steam inlet chambers connected to the high-pressure turbines, the outlets of the high-pressure turbines are respectively connected to the working fluid inlet pipes of the reheat combustors of the reheat combustor groups, and the reheat combustors of the reheat combustor groups The constriction section of the thermal combustion chamber and the outlet connecting pipe are connected to the inlet of the medium-pressure turbine through the inlet valve group of the medium-pressure turbine;

The regenerative circulation subsystem includes a condenser, a low-pressure heater group, a high-pressure heater group, a condensate pump, a feed water pump and a drain valve; the cooling water side of the condenser includes a water inlet and a water outlet, and the condensate outlet of the condenser passes through the condensate pump It is connected with the inlet of the low-pressure heater group, and the outlet of the low-pressure heater group is connected with the inlet of the high-pressure heater group through the feed water pump; the outlet of the high-pressure heater group is connected with the water inlet pipe of the high-pressure combustion chamber through the water supply inlet valve group of the high-pressure combustion chamber; the drain valve The inlet of the condensate pump is connected to the outlet pipeline;

The LNG and liquid oxygen supply and CO2 capture subsystem includes 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 Heater D; the outlet of the LNG storage tank is connected to the LNG side inlet of heat exchanger A through the LNG pump, the LNG side outlet of heat exchanger A is connected to the LNG inlet of heat exchanger D, and the LNG outlet of heat exchanger D The natural gas inlet valve group of the high-pressure combustor is connected with the natural gas inlet of each high-pressure combustor and the natural gas inlet of each reheat combustor is connected with the natural gas inlet of each reheat combustor through the natural gas inlet valve group of the reheat combustor; The liquid oxygen inlet of heat exchanger B is connected, the liquid oxygen outlet of heat exchanger B is connected with the liquid oxygen side inlet of heat exchanger D, and the liquid oxygen side outlet of heat exchanger D passes through the liquid oxygen inlet valve group of the high-pressure combustion chamber respectively It is connected with the liquid oxygen inlet of each high-pressure combustor and is connected with the liquid oxygen inlet of each reheat combustor through the liquid oxygen inlet valve group of the reheat combustor; the CO2 side inlet of heat exchanger A is located in the shell above the liquid level of the condenser In general, the CO2 side outlet of heat exchanger A is connected to the CO2 inlet of heat exchanger B through the CO2 compressor, and the CO2 outlet of heat exchanger B is connected to the CO2 inlet of heat exchanger C, and heat exchanger C includes CO2 Export;

The first-stage extraction port of the medium-pressure turbine is connected to the superheated steam inlet of the heat exchanger D through the medium-pressure turbine extraction valve A, and the superheated steam outlet of the heat exchanger D will be connected to the high-pressure heater group The steam inlet of the high-pressure heater is connected; the lower exhaust port of the medium-pressure turbine is connected with the steam inlet B of the condenser through the outlet bypass valve group of the medium-pressure turbine, and the upper exhaust port of the medium-pressure turbine is passed through The inlet valve group of the low-pressure turbine is connected with the inlet of the low-pressure turbine; the outlet of the low-pressure turbine is connected with the steam inlet A of the condenser; The ports are respectively connected to the steam inlets of the high-pressure heater group and the low-pressure heater group.

Further, the high-pressure turbine and the medium-pressure turbine are used to drive the generator A, and the low-pressure turbine is used to drive the generator B.

Further, what flows out of the CO2 outlet of the heat exchanger C is CO2 liquid.

Compared with prior art, the present invention has following advantage:

1. To meet the needs of grid-scale energy storage. The liquid oxygen required for LNG power generation is produced and stored during the off-peak period of the power grid. The storage space is small, and the investment in energy storage facilities can be greatly reduced. According to preliminary estimates, the energy consumption of oxygen production and storage accounts for roughly 25% to 35% of the generating capacity of the unit; while the cycle thermal efficiency of the generating unit can reach 60% to 65%. Since oxygen production consumes valley electricity, the cycle efficiency and economic benefits of its generator set are much higher than conventional power generation schemes.

2. The capture process of carbon dioxide is completed in combination with the condensation process of exhaust steam from the turbine, and the system is relatively simple. The LNG/liquid oxygen direct combustion feedwater mixed working fluid power cycle uses liquid oxygen instead of compressed air, so that the LNG/liquid oxygen high-pressure high-temperature combustion products and feedwater are mixed to generate H ₂ O/CO ₂ mixed steam, which expands in the turbine unit to generate electricity. After the exhaust steam is condensed and separated from water in the condenser, the carbon dioxide is pre-cooled by LNG and liquid oxygen, boosted by the compressor, and liquefied by part of the liquid nitrogen produced by the air separation unit, so as to realize the full capture and storage of carbon dioxide or be used for other Take advantage of occasions. As the combustion product is used as the working medium, it can expand to near the ambient temperature in the turbine, so the loss of exhaust smoke is eliminated, and the pure oxygen combustion avoids the formation of NOx, which has excellent environmental protection benefits.

3. Adopt the control strategy of regulating and controlling the power of the unit by combustion, that is, the high-pressure combustion chamber and the high-pressure turbine inlet chamber are regulated by unitization and grouping. Since the combustion chamber is designed according to the modularization of multiple combustion chambers, the combustion chamber of the present invention starts and stops Compared with the boiler, the regulation is more convenient. It can change the number of combustion chambers in operation and the amount of fuel to realize the regulation of the load of the unit.

4. Considering the material thickness of the turbine high-pressure cylinder required for 30MPa in terms of unit peak regulation, a complete shutdown of the gas turbine for peak regulation may be detrimental to its service life, so the method of decoupling the low-temperature turbine low-pressure cylinder The operation plan uses the bypass pipeline from the exhaust port of the medium-pressure cylinder to the condenser to exhaust steam, and can realize the high-efficiency operation of the unit under low load under the premise of ensuring the safety of the equipment. When the turbine low-pressure cylinder is decoupled, the reheat burner does not need to be put into operation, and the reheat combustion chamber is only used as a channel.

5. The thermal efficiency of the cycle is high. In addition to the above-mentioned measures that are beneficial to the improvement of cycle heat efficiency, it also benefits from the fact that the material consumption of the combustion chamber is far less than that of the boiler, and it is possible to use relatively expensive high-temperature resistant materials. Therefore, the operating parameters of the device of the present invention are the inlet of the turbine working fluid. The pressure and temperature are relatively high; in addition, the unit also has high efficiency at part load.

Description of drawings

Fig. 1 is a schematic flow chart of an embodiment of the present invention;

Fig. 2 is the schematic diagram of the high-pressure combustion chamber of the embodiment of the present invention;

Fig. 3 is a schematic diagram of a reheat combustor according to an embodiment of the present invention.

detailed description

Below in conjunction with Fig. 1 technical scheme of the present invention is described in detail:

Example:

A LNG/liquid oxygen direct combustion mixed working fluid power cycle power generation device, characterized in that it includes a work subsystem, a heat recovery cycle subsystem, and an LNG and liquid oxygen supply and CO2 capture subsystem, wherein,

The working subsystem includes a high-pressure combustor group 1-1, a reheat combustor group 1-2, a high-pressure turbine 1-3, a medium-pressure turbine 1-4, a low-pressure turbine 1-5, and a generator A 1 -6. Generator B 1-7 and valve group 1-8; the working subsystem uses H2O/CO2 mixed working fluid as the working fluid; the high-pressure combustion chamber group 1-1 is divided into 4 groups, corresponding to The four inlet chambers of the high-pressure turbine 1-3, each high-pressure combustor group 1-1 contains at least one high-pressure combustor 1-1-1; the high-pressure combustor 1-1-1 consists of a high-pressure combustor barrel 1-1-1-1, high-pressure combustion chamber burner 1-1-1-2, high-pressure combustion chamber flame tube 1-1-1-3, high-pressure combustion chamber spiral baffle group 1-1-1-4, High-pressure combustion chamber annular end plate 1-1-1-5, high-pressure combustion chamber atomization nozzle group 1-1-1-6, high-pressure combustion chamber left end plate 1-1-1-7, high-pressure combustion chamber water inlet connection 1- 1-1-8. The contraction section of the high-pressure combustion chamber and the outlet connecting pipe 1-1-1-9; The annular space between 1-1 and the high-pressure combustor flame tube 1-1-1-3 forms a spiral channel with a gradually increasing cross-sectional area; the high-pressure combustor burner 1-1-1-2 is equipped with a high-pressure Combustor natural gas inlet 1-1-1-10 and high-pressure combustor oxygen inlet 1-1-1-11; said reheat combustor groups 1-2 are grouped in the same number as high-pressure turbine exhaust ports, and each group is reheated The thermal combustor group 1-2 includes at least one reheat combustor 1-2-1; Chamber burner 1-2-1-2, reheat combustion chamber flame tube 1-2-1-3, reheat combustion chamber spiral baffle group 1-2-1-4, reheat combustion chamber left end plate 1- 2-1-7. Reheat combustion chamber working medium inlet connection 1-2-1-8, reheat combustion chamber contraction section and outlet connection 1-2-1-9; said reheat combustion chamber spiral baffle The group 1-2-1-4 forms an annular space between the reheating combustor barrel 1-2-1-1 and the reheating combustor flame barrel 1-2-1-3, and the flow cross-sectional area gradually increases Spiral passage; said reheat combustor burner 1-2-1-2 is provided with reheat combustor natural gas inlet 1-2-1-10 and reheat combustor oxygen inlet 1-2-1-11; said Valve group 1-8 includes high-pressure combustion chamber natural gas inlet valve group 1-8-1, high-pressure combustion chamber oxygen inlet valve group 1-8-2, high-pressure combustion chamber water supply inlet valve group 1-8-3, high-pressure turbine inlet valve group Group 1-8-4, reheat combustor natural gas inlet valve group 1-8-5, reheat combustor oxygen inlet valve group 1-8-6, medium pressure turbine inlet valve group 1-8-7, medium pressure Turbine extraction valve A 1-8-8, medium pressure turbine outlet bypass valve group 1-8-9 and low pressure turbine inlet valve group 1-8-10; each high pressure combustion chamber 1-1-1 high pressure The constriction section of the combustion chamber and the outlet connecting pipe 1-1-1-9 are imported through the high-pressure turbine Valve groups 1-8-4 are connected to 4 sets of steam inlet chambers of high-pressure turbines 1-3, and the outlets of high-pressure turbines are respectively connected to the working fluid inlets of reheat combustors of reheat combustor group 1-2 1-2- 1-8 are connected, the reheat combustor contraction section of each reheat combustor 1-2-1 of the reheat combustor group 1-2 and the outlet connecting pipe 1-2-1-9 pass through the inlet valve group of the medium pressure turbine 1-8-7 is connected with the inlet of medium pressure turbine 1-4;

The regenerative cycle subsystem includes a condenser 2-1, a low pressure heater group 2-2, a high pressure heater group 2-3, a condensate pump 2-4, a feed water pump 2-5 and a drain valve 2-6; 2-1 The cooling water side includes the water inlet 2-1-1 and the water outlet 2-1-2, the condenser condensate outlet 2-1-4 is connected to the inlet of the low-pressure heater group 2-2 through the condensate pump 2-4, The outlet of low-pressure heater group 2-2 is connected to the inlet of high-pressure heater group 2-3 through feed water pump 2-5; the outlet of high-pressure heater group 2-3 is connected to the high-pressure combustion chamber through high-pressure combustion chamber feedwater The water inlet connecting pipe 1-1-1-8 is connected; the inlet of the drain valve 2-6 is connected with the outlet pipeline of the condensate pump 2-4;

The LNG and liquid oxygen supply and CO2 capture subsystem includes LNG storage tank 3-1, liquid oxygen storage tank 3-2, LNG pump 3-3, liquid oxygen pump 3-4, CO2 compressor 3-5, Heater A3-6, heat exchanger B3-7, heat exchanger C3-8 and heat exchanger D3-9; the LNG from the outlet of LNG storage tank 3-1 passes through LNG pump 3-3 and heat exchanger A The side inlet 3-6-1 is connected, the LNG side outlet 3-6-2 of heat exchanger A is connected with the LNG inlet 3-9-1 of heat exchanger D, and the LNG outlet 3-9 of heat exchanger D -2 Connect the natural gas inlets 1-1-1-10 of the high-pressure combustors through the natural gas inlet valve group 1-8-1 of the high-pressure combustor and connect with the natural gas inlet valve group 1-8-5 of the reheating combustor respectively The natural gas inlet of the thermal combustion chamber is connected with 1-2-1-10; the outlet of liquid oxygen storage tank 3-2 is connected with the liquid oxygen inlet 3-7-1 of heat exchanger B through liquid oxygen pump 3-4, and the heat exchanger The liquid oxygen outlet 3-7-2 of B is connected to the liquid oxygen side inlet 3-9-3 of the heat exchanger D, and the liquid oxygen side outlet 3-9-4 of the heat exchanger D passes through the liquid oxygen inlet of the high-pressure combustion chamber respectively The valve group 1-8-2 is connected with the liquid oxygen inlet 1-1-1-11 of each high-pressure combustor and through the liquid oxygen inlet valve group 1-8-6 of the reheat combustor and the liquid oxygen inlet 1 of each reheat combustor -2-1-11 phase connection; the CO2 side inlet 3-6-3 of the heat exchanger A is set on the shell above the liquid level of the condenser 2-1, and the CO2 side outlet of the heat exchanger A 3-6-4 Connect the CO2 inlet 3-7-3 of the heat exchanger B through the CO2 compressor 3-5, and connect the CO2 outlet 3-7-4 of the heat exchanger B with the CO2 inlet 3-8-3 of the heat exchanger C , heat exchanger C includes CO2 outlet 3-8-4;

The first-stage steam extraction port of the medium-pressure turbine is connected to the superheated steam inlet 3-9-5 of the heat exchanger D 3-9 through the steam extraction valve A 1-8-8 of the medium-pressure turbine, and the heat exchanger D The superheated steam outlet 3-9-6 of the superheated steam will be connected with the steam inlet of a certain high-pressure heater of the high-pressure heater group 2-3; Road valve group 1-8-9 is connected to the condenser steam inlet B 2-1-5, and the upper exhaust port of the medium pressure turbine is connected to the low pressure turbine 1-8 through the low pressure turbine inlet valve group 1-8-10 5 inlets are connected; the outlets of the low-pressure turbine 1-5 are connected with the steam inlet A 2-1-3 of the condenser; the steam extraction ports of the high-pressure turbine and the low-pressure turbine and other steam extraction ports of the medium-pressure turbine The ports are respectively connected with the steam inlets of the high-pressure heater group 2-3 and the low-pressure heater group 2-2.

Preferably, the high-pressure turbine 1-3 and the medium-pressure turbine 1-4 of the described LNG/liquid oxygen direct combustion mixed working medium power cycle power generation device are used to drive the generator A 1-6, and the low-pressure turbine Flats 1-5 are used to drive generators B 1-7. What flows out of the CO2 outlet 3-8-4 of the heat exchanger C is CO2 liquid.

The working process of the present invention is as follows:

Run the air separation device to prepare liquid oxygen and liquid nitrogen during the off-peak period, and the generator set operates at the partial load (about 20%) of the low-pressure turbine 1-5 during the off-peak period; all turbines of the generator set during the peak period Putting into operation; when the generator set is running, LNG/liquid oxygen burns in the high-pressure combustor group 1-1 and heats the mixed feed water to generate H2O/CO2 mixed steam, which expands in stages in the turbine to generate power. Burning and reheating; when the turbine low-pressure cylinder is decommissioned, the reheating burner does not need to be put into operation, and the reheating combustion chamber is only used as a channel. The turbine exhaust steam is condensed in the condenser 2-1, and the water is separated from CO2. Most of the condensed water flows back to the high-pressure combustor group through the feed water recovery system, and part of the H2O corresponding to the amount of combustion products passes through the drain valve 2. -6 exhaust system. Gaseous CO2 is pre-cooled by LNG through the heat exchanger A 3-6 whose inlet is arranged on the condenser shell, and is further cooled by liquid oxygen in the heat exchanger B 3-7 after boosting in the compressor 3-5. The CO2 is then liquefied in heat exchanger C 3-8 using part of the liquid nitrogen produced by the air separation unit. In order to make natural gas and oxygen reach the inlet parameters of the burner, both are heated by the superheated steam section of the extraction steam drawn from the medium-pressure cylinder in the heat exchanger D 3-9, and then flow to each combustion chamber, where the superheated steam The pressure is low but the degree of superheat is high, and it is not economical to directly heat the feed water. A flame cylinder is set in the high-pressure combustion chamber 1-1-1, and the natural gas and oxygen are stably combusted in the flame cylinder to generate high-temperature and high-pressure mixed steam, and high-pressure feed water is injected into the annular space outside the flame cylinder of the high-pressure combustion chamber (cooling for the reheat combustion chamber) Reheating mixed steam), on the one hand, it cools the flame tube of the combustion chamber, on the other hand, it absorbs heat and evaporates itself, and the steam-water mixture is sprayed at the outlet of the flame area to mix and transfer heat with the combustion products, and the pressure and temperature of the mixed working medium steam are adjusted to the equipment within the safe operation range, and then sequentially enter the high-pressure turbine, reheat combustor, medium-pressure turbine and low-pressure turbine for expansion work and primary reheating; during off-peak hours, the generator set is de-loaded according to the low-pressure turbine part load During operation, the low-pressure turbine inlet valve group 1-8-10 is closed, the medium-pressure turbine outlet bypass valve group 1-8-9 is opened, and the exhausted mixed steam directly enters the condenser 2-1.

Claims (3)

1. a kind of LNG/ liquid oxygen direct combustion Mixed working fluid cycle TRT, it is characterised in that including acting subsystem, backheat Cycle subsystem and LNG and liquid oxygen supply trap subsystem with CO2, wherein,

The acting subsystem includes high compression combustion chamber group (1-1), reheat combustion chamber group (1-2), high pressure turbine (1-3), middle pressure Turbine (1-4), low pressure turbine (1-5), generator A (1-6), generator B (1-7) and valve group (1-8)；The acting subsystem is adopted Working medium is used as with H2O/CO2 mixed working fluids；The high compression combustion chamber group (1-1) is divided into 4 groups, corresponds respectively to high pressure turbine (1- 3) 4 air chambers, each high compression combustion chamber group (1-1) comprises at least a high compression combustion chamber (1-1-1)；The high-pressure combustion Room (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 ignition Burn room 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；The 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 through-flow The helical duct that sectional area gradually increases；The high compression combustion chamber burner (1-1-1-2) is entered provided with high compression combustion chamber natural gas Mouth (1-1-1-10) and high compression combustion chamber oxygen inlet (1-1-1-11)；Reheat combustion chamber group (1-2) number of packet and height Pressure turbine exhaust mouthful quantity is identical, and every group of reheat combustion chamber group (1-2) at least includes 1 reheat combustion chamber (1-2-1)；It is described again Hot chamber (1-2-1) is by 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), again Hot chamber working medium entrance sleeve (1-2-1-8), reheat combustion chamber contraction section and discharge connection (1-2-1-9) composition；It is described again Hot chamber helical baffles group (1-2-1-4) is in reheat combustion chamber cylinder (1-2-1-1) and reheat combustion chamber burner inner liner (1-2- The helical duct that annular space formation cross-sectional flow area between 1-3) gradually increases；Reheat combustion chamber burner (the 1-2- 1-2) it is provided with reheat combustion chamber Imported gas (1-2-1-10) and reheat combustion chamber oxygen inlet (1-2-1-11)；The 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 ignition Burn room feed-water inlet valve group (1-8-3), high pressure turbine import 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 import 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 import valve group (1-8-10)；Each high compression combustion chamber (1-1-1) High compression combustion chamber contraction section and discharge connection (1-1-1-9) pass through high pressure turbine import valve group (1-8-4) connect high pressure turbine 4 groups of air chambers of (1-3), each reheat combustion chamber working medium import of the outlet of high pressure turbine respectively with reheat combustion chamber group (1-2) Adapter (1-2-1-8) is connected, the reheat combustion chamber contraction section of each reheat combustion chamber (1-2-1) of reheat combustion chamber group (1-2) And discharge connection (1-2-1-9) is connected by intermediate pressure turbine import valve group (1-8-7) with the import of intermediate pressure turbine (1-4)；

The extraction cycle subsystem includes condenser (2-1), low-pressure heater group (2-2), high-pressure heater group (2-3), solidifying Bear water pump (2-4), feed pump (2-5) and draining valve (2-6)；Condenser (2-1) cooling water side includes water inlet (2-1-1) and gone out The mouth of a river (2-1-2), condenser condenses water out (2-1-4) and passes through condensate pump (2-4) and low-pressure heater group (2-2) import phase Even, low-pressure heater group (2-2) outlet is connected by feed pump (2-5) with high-pressure heater group (2-3) import；High-pressure heater Group (2-3) outlet passes through high compression combustion chamber feed-water inlet valve group (1-8-3) and high compression combustion chamber water inlet adapter (1-1-1-8) phase Even；The import of the draining valve (2-6) is connected with condensate pump (2-4) outlet line；

LNG and the liquid oxygen supply includes LNG storage tank (3-1), liquid oxygen storage tank (3-2), LNG pump (3- with CO2 trapping subsystems 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 by LNG pump (3-3) with heat exchanger A LNG side-entrances (3-6-1), heat exchanger A LNG side outlets (3-6-2) be connected with heat exchanger D LNG imports (3-9-1), heat exchanger D LNG outlet (3-9-2) point It is not connected by high compression combustion chamber Imported gas valve group (1-8-1) with each high compression combustion chamber Imported gas (1-1-1-10) It is connected with by reheat combustion chamber Imported gas valve group (1-8-5) with each reheat combustion chamber Imported gas (1-2-1-10) Connect；Liquid oxygen storage tank (3-2) outlet is connected by liquid oxygen pump (3-4) with heat exchanger B liquid oxygen import (3-7-1), heat exchanger B's Liquid oxygen outlet (3-7-2) is connected with heat exchanger D liquid oxygen side-entrance (3-9-3), heat exchanger D liquid oxygen side outlet (3-9-4) Be connected respectively with each high compression combustion chamber liquid oxygen import (1-1-1-11) by high compression combustion chamber liquid oxygen import valve group (1-8-2) and It is connected by reheat combustion chamber liquid oxygen import valve group (1-8-6) with each reheat combustion chamber liquid oxygen import (1-2-1-11)；Heat exchange Device A CO2 side-entrances (3-6-3) are located on housing more than condenser (2-1) liquid level, heat exchanger A CO2 side outlets (3-6- 4) be connected by CO2 compressor (3-5) with heat exchanger B CO2 imports (3-7-3), heat exchanger B CO2 outlet (3-7-4) with Heat exchanger C CO2 imports (3-8-3) are connected, and heat exchanger C includes CO2 outlets (3-8-4)；

Intermediate pressure turbine first order extraction opening is entered by intermediate pressure turbine extraction valve A (1-8-8) and heat exchanger D (3-9) superheated steam Steam ports (3-9-5) is connected, and heat exchanger D superheated steam venthole (3-9-6) adds the high pressure with high-pressure heater group (2-3) The steam inlet of hot device is connected；The lower steam drain of intermediate pressure turbine by intermediate pressure turbine outlet bypass valve group (1-8-9) with it is cold Condenser air intake B (2-1-5) is connected, and the upper steam drain of intermediate pressure turbine passes through low pressure turbine import valve group (1-8-10) and low pressure Turbine (1-5) import is connected；The outlet of low pressure turbine (1-5) is connected with condenser air intake A (2-1-3)；High pressure turbine, Each extraction opening of low pressure turbine and each extraction opening of intermediate pressure turbine respectively with high-pressure heater group (2-3) and low-pressure heater group Each steam inlet correspondence of (2-2) is connected.

2. a kind of LNG/ liquid oxygen direct combustion Mixed working fluid cycle TRT according to claim 1, it is characterised in that High pressure turbine (1-3) and intermediate pressure turbine (1-4) are used to drive generator A (1-6), and low pressure turbine (1-5) is used to drive generator 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 The CO2 outlets of the heat exchanger C（3-8-4）Outflow for CO2 liquid.