CN220135438U - Coal gas power generation device coupling coal gas cabinet and fused salt energy storage - Google Patents

Abstract

The utility model relates to a coal gas power generation device coupling a coal gas cabinet and fused salt energy storage, and belongs to the field of power generation peak shaving. The system comprises a gas system, a power generation system and a molten salt system; the power generation system comprises a gas boiler, a steam turbine and a generator, wherein steam generated by the gas boiler drives the generator to generate power; the molten salt system takes molten salt and water as media to store energy and release energy to match working conditions; a gas tank adjusting control valve group is arranged between the gas system and the power generation system; the gas boiler is connected to the steam turbine through a main steam regulating control valve group. The system can effectively participate in peak regulation of the whole plant power grid, takes the high-parameter gas generator set as a peak regulation power station, timely regulates the peak according to peak-valley electricity price difference and gas production and marketing characteristics, increases the power generation quantity of the plant in the peak period and the power consumption quantity of the plant in the off-peak period, and reduces the power consumption quantity of the plant in the peak period and the power generation quantity of the plant in the off-peak period, so that the power consumption economy of the whole plant is improved.

Description

Coal gas power generation device coupling coal gas cabinet and fused salt energy storage

Technical Field

The utility model belongs to the field of power generation peak shaving, and relates to a coal gas power generation device coupling a coal gas cabinet and fused salt energy storage.

Background

As a large power consumption user, the self-powered rate of the iron and steel enterprises is less than 70%, and a large amount of power purchase is still needed each year. With the gradual application of a series of new energy technologies such as photovoltaic power generation, wind power and the like in iron and steel enterprises and the increasing peak-to-valley electricity price difference in various areas, the energy storage peak regulation and peak staggering power generation can bring great economic benefits for the iron and steel enterprises. The gas is used as an accessory product produced by the whole plant process, and the high-efficiency peak-shifting power generation can ensure that the whole plant can obtain higher economic value while the self-generated power of the whole plant meets the production requirement.

The capacity of the traditional gas tank is generally configured according to the production requirement of the front-end process, and the traditional gas tank can be used as a buffer facility for gas quantity fluctuation and also can be used as a gas pipe network voltage stabilizing device of a whole plant, and less energy storage function is involved in application, so that even if energy storage is only carried out for a short time, the energy storage cannot be regulated for a long time. The intermittent production and equipment overhaul of the process production are unavoidable, so that a certain amount of gas is dispersed, and resources are wasted.

Disclosure of Invention

In view of the above, the utility model aims to provide a gas power generation device for coupling a gas tank and fused salt energy storage, which integrates a gas system and a fused salt system to realize more flexible energy storage adjustment and realize decoupling of gas yield and generated energy.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a coal gas power generation device for coupling a coal gas cabinet and fused salt energy storage comprises a coal gas system, a power generation system and a fused salt system; the gas system comprises at least one gas tank; the power generation system comprises a gas boiler, a steam turbine and a generator, wherein steam generated by the gas boiler is sent to the steam turbine and then drives the generator to generate power; the molten salt system takes molten salt and water as media to store energy and release energy to match working conditions; the gas system and the molten salt system are coupled with the power generation system through the gas boiler; a gas tank adjusting control valve group is arranged between the gas system and the power generation system; the gas boiler is connected to the steam turbine through a main steam regulating control valve group.

Optionally, the steam turbine comprises a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder, the steam from the gas boiler returns to the gas boiler after working by the high-pressure cylinder, is sent to the medium-pressure cylinder and the low-pressure cylinder after reheating, is condensed by a condenser after working, is sequentially connected with a low-pressure heater and a deaerator by a condensate pump, is sequentially connected to a water supply pump and the high-pressure heater after deaeration, and is finally connected back to the gas boiler.

Optionally, 4 low-pressure heaters are continuously arranged, 3 high-pressure heaters are continuously arranged, the middle stage and the last stage steam extraction pipeline of the high-pressure cylinder of the steam turbine are respectively connected with the steam side inlets of 2 high-pressure heaters, and the middle stage and the last stage steam extraction pipeline of the medium-pressure cylinder of the steam turbine are respectively connected with the steam side inlets of 1 high-pressure heater, 1 deaerator and 4 low-pressure heaters in sequence; and 3 high-pressure heaters, 1 deaerator and 4 low-pressure heaters are sequentially used for dewatering, and finally the final-stage air extraction dewatering is connected with the condenser.

Optionally, the molten salt system comprises a molten salt steam generation system, a cold molten salt storage tank, a molten salt steam cooling system and a hot molten salt storage tank which are sequentially connected, wherein the hot molten salt storage tank is connected to the molten salt steam generation system; the steam outlet of the gas boiler is connected to the molten salt steam cooling system, and the molten salt steam generating system is connected to the steam outlet of the gas boiler.

Optionally, 1 path of water supply is led out after the deaerator, is connected with a fused salt steam generation system through a fused salt energy release water supply regulation control valve group and a fused salt energy release water supply pump, and is converged into a steam outlet of the gas boiler after superheated steam is generated; after the energy of the feed water extracted by the deaerator is released by the molten salt system, the temperature and the pressure of the feed water are raised to be superheated steam, and the steam pressure temperature meets the parameter requirements of the superheated steam at the outlet of the gas boiler.

Optionally, the gas boiler draws 1 way steam to link to each other with fused salt steam cooling system through fused salt energy storage extraction regulation valve group, and the feedwater after the cooling is gone into through fused salt energy storage feed water pump the entry water supply pipe network of gas boiler, comes from the superheated steam condensation of gas boiler is the feedwater after fused salt system energy storage, and its pressure temperature satisfies the feedwater parameter demand of gas boiler.

Optionally, a molten salt electric heating unit is arranged between the molten salt steam cooling system and the hot molten salt storage tank, and a molten salt electric heating unit bypass valve is connected in parallel with the molten salt electric heating unit; and a molten salt electric heating unit shutoff valve is arranged on the molten salt electric heating unit.

Optionally, the molten salt steam generation system comprises a preheater, an evaporator and a first superheater which are sequentially connected.

Optionally, the molten salt steam cooling system comprises a second superheater, a condensation deaerator and a hot water heat exchanger which are sequentially connected.

The utility model has the beneficial effects that:

the utility model provides a technical scheme for organically combining molten salt energy storage with gas power generation, which can intelligently allocate the operation modes of different working conditions, provide a more flexible and longer-time energy storage solution for a whole plant power system, realize decoupling of gas yield and generated energy, effectively regulate and control a generator set according to the maximum electric economic benefit of the whole plant, realize cooperative optimization of 'source network charge storage' of a plant area by exploiting the great potential and technical advantage of deep participation of the gas generator set in whole plant power grid peak regulation, reasonably utilize the peak Gu Pingdian price difference, reduce the outsourcing electricity cost and provide service for enterprises.

The system can effectively participate in peak regulation of the whole plant power grid, takes the high-parameter gas generator set as a peak regulation power station, timely regulates the peak according to peak-valley electricity price difference and gas production and marketing characteristics, increases the power generation quantity of the plant in the peak period and the power consumption quantity of the plant in the off-peak period, and reduces the power consumption quantity of the plant in the peak period and the power generation quantity of the plant in the off-peak period, so that the power consumption economy of the whole plant is improved.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:

fig. 1 is a system diagram of the present utility model.

Reference numerals: the system comprises a steam turbine 1, a generator 2, a gas boiler 3, a condenser 4, a low-pressure heater 5, a high-pressure heater 6, a deaerator 7, a gas cabinet group 8, a hot molten salt tank 9, a cold molten salt tank 10, a molten salt steam generating system 11, a molten salt steam cooling system 12, a condensate pump 13, a water feeding pump 14, a high-temperature molten salt conveying pump 15, a low-temperature molten salt conveying pump 16, a molten salt energy-releasing water feeding pump 17, a molten salt energy-storing water feeding pump 18, a molten salt energy-releasing water feeding regulation control valve group 19, an energy-storing steam extraction regulation control valve group 20, a gas cabinet regulation control valve group 21, a main steam regulation control valve group 22, a molten salt electric heating unit 23, a molten salt electric heating unit bypass valve 24 and a molten salt electric heating unit shutoff valve 25.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, the utility model designs a gas power generation device coupling a gas tank and molten salt energy storage, which comprises a steam turbine 1, a generator 2, a gas boiler 3, a condenser 4, a low-pressure heater 5, a high-pressure heater 6, a deaerator 7, a gas tank group 8, a hot molten salt tank 9, a cold molten salt tank 10, a molten salt steam generation system 11, a molten salt steam cooling system 12, a condensate pump 13, a water feed pump 14, a high-temperature molten salt delivery pump 15, a low-temperature molten salt delivery pump 16, a molten salt energy-releasing water feed pump 17, an energy-storing water feed pump 18, a molten salt energy-releasing water feed regulating and controlling valve group 19, a molten salt energy-storing steam extraction regulating and controlling valve group 20, a gas tank regulating and controlling valve group 21, a main steam regulating and controlling valve group 22, a molten salt electric heating unit 23, a molten salt electric heating unit bypass valve 24 and a molten salt electric heating unit shutoff valve 25.

The system comprises 3 subsystems:

(1) gas system

The gas tank group 8 is connected with the gas boiler 3 through a gas pipeline, and the gas tank adjusting and controlling valve group 21 is arranged on the connecting pipeline to adjust the gas quantity.

(2) Power generation system

The gas boiler 3 generates main steam and sends the main steam to the high-parameter steam turbine 1 through a pipeline, a connecting pipeline is provided with a main steam regulating control valve group 22, the steam is sent back to the gas boiler 3 through a pipeline after the high-pressure cylinder does work, the steam is sent to the low-pressure cylinder in the steam turbine 1 after reheating, the steam is condensed in a condenser 4 after doing work, the condenser 4 is sequentially connected with a condensate pump 13, a shaft seal heater, 4 low-pressure heaters 5 and a deaerator 7 through pipelines, and the water supply after deaeration is sequentially connected with a water supply pump 14 and 3 high-pressure heaters 6 and finally is sent to the gas boiler 3 through pipeline connection.

The middle stage and the final stage steam extraction pipeline of the high-pressure cylinder of the steam turbine 1 are respectively connected with the steam side inlets of the 2 high-pressure heaters 6, and the middle stage and the final stage steam extraction pipeline of the high-pressure cylinder of the steam turbine 1 are respectively connected with the steam side inlets of the 1 high-pressure heater 6, the 1 deaerator 7 and the 4 low-pressure heaters 5 in sequence. The 3 high-pressure heaters 6, the 1 deaerators 7 and the 4 low-pressure heaters 5 are sequentially drained from left to right according to the sequence of the drawing, and finally the final-stage steam extraction drain is connected with the condenser 4 to form a traditional gas generator 2-group thermodynamic system.

And 1 path of water supply is led out after the deaerator 7 and is connected with a fused salt energy release system through a pipeline, the pipeline passes through a fused salt energy release water supply regulating and controlling valve group 19, then passes through a fused salt energy release water supply pump 17 and is connected with a fused salt steam generation system 11, and the system generates superheated steam and then is gathered into a main steam pipeline network of a boiler outlet through the pipeline.

The main steam pipe network at the outlet of the gas boiler 3 is connected with the fused salt steam cooling system 12 by leading 1 path of steam, the main steam is connected to the fused salt steam cooler 12 after passing through the fused salt energy storage and steam extraction regulating and controlling valve group 20, and the cooled water supply is connected to the fused salt energy storage water supply pump 18 through a pipeline and finally is collected into the boiler inlet water supply pipe network.

In the present embodiment, a structure of a steam turbine 1 with a high pressure cylinder, a medium pressure cylinder and a low pressure cylinder is specifically disclosed, and the embodiment is disclosed as an alternative of the present utility model, and the present utility model does not exclude other technical implementation forms of the steam turbine structure adopting single cylinder, double cylinder or other structural forms. Similarly, in the present embodiment, the arrangement positions and the arrangement number of the low-pressure heater 5 and the high-pressure heater 6 are specifically disclosed, and this implementation form is also only an alternative of the present utility model, and the present utility model does not exclude other technical implementation forms.

(3) Molten salt system

(1) Molten salt energy storage: the cold molten salt tank 10 is connected with a low-temperature molten salt conveying pump 16 through a pipeline, the low-temperature molten salt conveying pump 16 conveys low-temperature molten salt to the molten salt steam cooling system 12 for heating, and the molten salt is conveyed to the molten salt electric heating unit 23 through the pipeline after being heated. When the feed water is heated by the fused salt steam cooling system 12, the main steam parameters meet the generating requirements of the unit, the fused salt electric heating unit shutoff valve 25 is closed, and the fused salt electric heating unit bypass valve 24 is opened. When the water supply is heated by the fused salt steam cooling system 12, the main steam parameter is lower than the generating requirement of the unit, the fused salt electric heating unit shutoff valve 25 is opened, the fused salt electric heating unit bypass valve 24 is closed, and the fused salt is sent to the hot fused salt tank 9 for storage through a pipeline after the electric heating unit supplements heat.

(2) Molten salt energy release: the hot molten salt tank 9 is connected with a high-temperature molten salt conveying pump 15 through a pipeline, the high-temperature molten salt conveying pump 15 conveys molten salt to the molten salt steam generation system 11 for cooling, and the cooled molten salt is conveyed to the cold molten salt tank 10 through a pipeline for storage.

The gas medium stored in the energy storage gas tank group 8 can be blast furnace gas, coke oven gas, converter gas, natural gas or a mixture of two or more gas mediums. The energy storage gas tank group 8 is provided with an independent gas inlet and a gas outlet, and the working pressure of the gas tank is lower than the gas diffusing pressure of the whole plant and higher than the normal working pressure of the gas main network. An adjusting control valve group is arranged between the gas tank group 8 and the high-parameter gas boiler 3, and the gas supply quantity can be adjusted according to the load demand (whole plant power demand) of the gas generator 2 group and the fused salt energy storage demand. The main steam pressure parameter of the high-parameter steam turbine 1 and the gas boiler 3 is more than or equal to 13.2MPa, and the temperature parameter is more than or equal to 540 ℃. The high-parameter steam turbine 1 can be a high-temperature ultrahigh-pressure, ultrahigh-temperature ultrahigh-pressure, subcritical ultrahigh-temperature and supercritical ultrahigh-temperature steam turbine 1, and a reheating technology is adopted; the high-parameter gas boiler 3 can be a high-temperature ultrahigh-pressure, ultrahigh-temperature ultrahigh-pressure, subcritical ultrahigh-temperature and supercritical ultrahigh-temperature gas boiler 3, and a reheating technology is adopted.

And the high-parameter steam turbine generator 2 groups are connected with a factory area power grid through a transformer. The gas boiler 3, the high-parameter steam turbine 1 and the high-parameter generator 2 are all wide-load peak regulating units. The fused salt system (fused salt energy storage and fused salt energy release) is coupled with the power generation system, and can select to perform fused salt energy storage or fused salt energy release according to the actual power generation requirement, and the fused salt energy release adjusting and controlling valve group 19 or the fused salt energy storage and steam extraction adjusting and controlling valve group 20 is respectively opened or closed. The gas cabinet regulating control valve group 21, the fused salt energy storage system regulating fused salt energy storage and steam extraction regulating control valve group 20 and the fused salt energy release water supply regulating control valve group 19 are intelligently connected, so that the gas supply quantity, the steam extraction quantity and the water supply conveying quantity can be intelligently regulated and controlled according to the actual power generation requirements.

The molten salt steam generating system 11 is a preheater, an evaporator and a superheater which are connected in sequence. The molten salt steam cooling system 12 is a superheater, a condensation deaerator and a hot water heat exchanger which are connected in sequence. The fused salt electric heating unit 23 can realize flexible operation of the electric heating system by adjusting the fused salt electric heating unit bypass valve 24 and the fused salt electric heating unit shutoff valve 25. The molten salt used in the molten salt system is a multi-element mixed inorganic salt, and the using temperature is 150-800 ℃. Superheated steam from the main steam extraction is condensed into feed water after energy storage of a molten salt system, and the pressure and temperature of the regulated feed water meet the requirements of the feed water parameters of the inlet of the gas boiler 3. After the energy of the water supply extracted from the deaerator 7 is released through the molten salt system, the water supply is heated and boosted into superheated steam, and the pressure and the temperature of the superheated steam after the heat supplement adjustment meet the requirements of the superheated steam parameters of the outlet of the gas boiler 3.

In this embodiment, the present utility model provides the following three modes of operation:

(1) Non-energy-storage energy-release working mode

The fused salt energy-releasing water supply regulating and controlling valve group 19 and the fused salt energy-storing steam extraction regulating and controlling valve group 20 are closed, and the fused salt energy-storing system and the fused salt energy-releasing system are closed. The gas tank regulating and controlling valve group 21 is opened, the gas is sent to the gas tank group 8 for storage through the whole plant gas pipe network, and then is sent to the gas boiler 3 through a pipeline, the gas tank regulating and controlling valve group 21 can be automatically regulated according to the power load of the whole plant to regulate the gas inflow of the gas boiler 3, related equipment of a power generation system normally operates, and the gas produced by the gas boiler 3 is sent to the high-parameter steam turbine 1 through a pipeline, so that the high-parameter generator 2 is driven to generate power.

(2) Energy storage operation mode

In the electricity consumption valley period, the fused salt energy storage system is started, meanwhile, the power generation load of the 2 groups of gas generators is adjusted to be minimum through adjusting the gas holder adjusting control valve group 21, and on the premise of guaranteeing the balance and voltage stabilization of the whole plant gas, the maximum gas holder energy storage and fused salt energy storage are realized through adjusting the fused salt energy storage and extraction adjusting control valve group 20 and the fused salt energy release and water supply adjusting control valve group 19, and the fused salt energy storage priority in the adjusting and controlling process is higher than that of the gas holder.

Specifically, the fused salt energy storage and steam extraction regulating control valve group 20 is opened, the fused salt energy release water supply regulating control valve group 19 is closed, the opening sizes of the gas tank regulating control valve group 21, the fused salt energy storage and steam extraction regulating control valve group 20 and the main steam regulating control valve group 22 are regulated, and the gas boiler 3 produces steam, extracts steam and removes a fused salt energy storage system. The load of the power generation system can be adjusted to the minimum by regulation and control, and the maximum molten salt energy storage and gas tank energy storage are realized, wherein the priority of the molten salt energy storage is higher than that of the gas energy storage.

After the gas boiler 3 produces steam and extracts steam and exchanges heat in the fused salt steam cooling system 12, the temperature is reduced to the water supply temperature of the boiler, and then the water supply is conveyed and converged into a water supply inlet of the gas boiler 3 through the pressure rise of the fused salt energy storage water supply pump 18.

And starting a low-temperature molten salt conveying pump 16, conveying cold molten salt into a molten salt steam cooling system 12 for heat exchange, and selectively starting a molten salt electric heating system for heat compensation according to the outlet parameter requirement of the gas boiler 3. When the fused salt heat exchange load does not meet the main steam parameter requirement, the fused salt can be supplemented by closing the fused salt electric heating unit bypass valve 24 and opening the fused salt electric heating unit shutoff valve 25. When the fused salt heat exchange heat load meets the main steam parameter requirement, the fused salt electric heating unit bypass valve 24 is opened, the fused salt electric heating unit shutoff valve 25 is closed, and the heat supplement is stopped. After the temperature of the fused salt is raised, the fused salt is conveyed to a hot fused salt tank 9 for storage.

(3) Energy release operation mode

In the electricity consumption peak period, the fused salt energy release system is started, meanwhile, the load of the group 2 of the gas generator is adjusted to the maximum through adjusting the gas tank adjusting and controlling valve group 21, and on the premise of guaranteeing the balance and pressure stabilization of the whole plant gas, the maximum gas tank energy release and fused salt energy release are realized through adjusting the fused salt energy storage and extraction adjusting and controlling valve group 20 and the fused salt energy release water supply adjusting and controlling valve group 19, and the fused salt energy release priority in the adjusting and controlling process is higher than that of the gas tank.

Specifically, the fused salt energy storage and steam extraction regulating control valve group 20 is closed, the fused salt energy release water supply regulating control valve group 19 is opened, the opening sizes of the gas tank regulating control valve group 21, the fused salt energy release water supply regulating control valve group 19 and the main steam regulating control valve group 22 are regulated, and the water supply and fused salt energy release system after the deaerator 7 is regulated. The regulation and control can adjust the power generation load of the power generation system to the maximum, and realize the maximum fused salt energy release and gas tank energy release, wherein the fused salt energy release priority is higher than the gas energy release.

After being regulated by a fused salt energy-releasing water supply regulating control valve group 19, the water supply is conveyed to a fused salt steam generation system 11 for absorbing heat through a fused salt energy-releasing water supply pump 17, a fused salt electric heating system is selectively started for supplementing heat according to the lifted steam parameters after heating, and the superheated steam after heating is conveyed to a main steam outlet of a gas boiler 3 through a pipeline for merging, is conveyed to a high-parameter steam turbine 1 through a pipeline, and then drives a high-parameter generator 2 for generating power.

Starting a high-temperature molten salt conveying pump 15, conveying the high-temperature molten salt to a molten salt steam generating system 11 for heat exchange, and conveying the cooled molten salt to a cold molten salt tank 10 for storage.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.

Claims (9)

1. A coal gas power generation device coupling a gas holder and fused salt energy storage is characterized in that:

the system comprises a gas system, a power generation system and a molten salt system;

the gas system comprises at least one gas tank;

the power generation system comprises a gas boiler (3), a steam turbine (1) and a generator (2), wherein steam generated by the gas boiler (3) is sent to the steam turbine (1) and then drives the generator (2) to generate power;

the molten salt system takes molten salt and water as media to store energy and release energy to match working conditions;

the gas system and the molten salt system are coupled with the power generation system through the gas boiler (3);

a gas tank adjusting control valve group (21) is arranged between the gas system and the power generation system;

the gas boiler (3) is connected to the steam turbine (1) by a main steam regulating control valve group (22).

2. The gas power generation device coupled with a gas holder and molten salt energy storage according to claim 1, wherein: the steam turbine (1) comprises a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder, steam from the gas boiler (3) returns to the gas boiler (3) after acting through the high-pressure cylinder, is sent to the medium-pressure cylinder and the low-pressure cylinder through reheating, is condensed through a condenser (4) after acting, is sequentially connected with a low-pressure heater (5) and a deaerator (7) through a condensate pump (13), is sequentially connected to a water supply pump (14) and a high-pressure heater (6) after deaerating, and is finally connected back to the gas boiler (3).

3. The gas power generation device coupled with a gas holder and molten salt energy storage according to claim 2, wherein: the low-pressure heaters (5) are continuously arranged in 4, the high-pressure heaters (6) are continuously arranged in 3, the middle stage and the last stage steam extraction pipeline of the high-pressure cylinder of the steam turbine (1) are respectively connected with the steam side inlets of the 2 high-pressure heaters (6), the middle stage and the last stage steam extraction pipeline of the medium-pressure cylinder of the steam turbine (1) are respectively connected with the 1 deaerator (7) of the 1 high-pressure heater (6) in sequence, and the 4 low-pressure heaters (5) are respectively connected with the steam side inlets of the 1 high-pressure heater (6); and 3 high-pressure heaters (6), 1 deaerator (7) and 4 low-pressure heaters (5) are sequentially subjected to water drainage, and finally the final-stage air suction water drainage is connected with the condenser (4).

4. The gas power generation device coupled with a gas holder and molten salt energy storage according to claim 2, wherein: the molten salt system comprises a molten salt steam generation system (11), a cold molten salt storage tank, a molten salt steam cooling system (12) and a hot molten salt storage tank which are sequentially connected, wherein the hot molten salt storage tank is connected to the molten salt steam generation system (11) in a back-connection mode; the steam outlet of the gas boiler (3) is connected to the molten salt steam cooling system (12), and the molten salt steam generating system (11) is connected to the steam outlet of the gas boiler (3).

5. The gas power generation device coupled with a gas holder and molten salt energy storage of claim 4, wherein: the deaerator (7) is provided with a 1-path water supply, which is connected with a fused salt steam generation system (11) through a fused salt energy release water supply regulating and controlling valve group (19) and a fused salt energy release water supply pump (17), and is converged into a steam outlet of the gas boiler (3) after generating superheated steam; after the energy of the feed water extracted by the deaerator (7) is released by the molten salt system, the temperature and the pressure of the feed water are raised to be superheated steam, and the steam pressure temperature meets the parameter requirements of the superheated steam at the outlet of the gas boiler (3).

6. The gas power generation device coupled with a gas holder and molten salt energy storage of claim 4, wherein: the gas boiler (3) draws 1 way steam to link to each other with fused salt steam cooling system (12) through fused salt energy storage extraction regulation valve group (20), and the feedwater after the cooling is passed through fused salt energy storage feed water pump (18) and is assembled to gas boiler (3) entry feed water pipe network, come from superheated steam of gas boiler (3) condenses into the feedwater after fused salt system energy storage, and its pressure temperature satisfies gas boiler (3) feedwater parameter demand.

7. The gas power generation device coupled with a gas holder and molten salt energy storage of claim 4, wherein: a molten salt electric heating unit (23) is arranged between the molten salt steam cooling system (12) and the hot molten salt storage tank, and a molten salt electric heating unit bypass valve (24) is connected on the molten salt electric heating unit (23) in parallel; and a fused salt electric heating unit shutoff valve (25) is arranged on the fused salt electric heating unit (23).

8. The gas power generation device coupled with a gas holder and molten salt energy storage of claim 4, wherein: the molten salt steam generation system (11) comprises a preheater, an evaporator and a first superheater which are connected in sequence.

9. The gas power generation device coupled with a gas holder and molten salt energy storage of claim 4, wherein: the molten salt steam cooling system (12) comprises a second superheater, a condensation deaerator (7) and a hot water heat exchanger which are connected in sequence.