阅读说明：本技术 一种天然气压差能压缩空气储能系统 (Natural gas pressure difference energy compressed air energy storage system ) 是由 蔡亮 徐啸 于 2020-05-08 设计创作，主要内容包括：本发明公开了一种天然气压差能压缩空气储能系统,包括天然气涡轮、电机及空压机,所述天然气涡轮与所述电机相连接,所述空压机与所述电机相连接,所述天然气涡轮出气端依次连接有冷热交换器、锅炉、燃气轮机及发电机,所述天然气涡轮进气端外接蓄热器,所述蓄热器与所述燃气轮机相连接,所述空压机出口依次连接有冷却除湿器、过滤干燥器及高压储气罐,所述高压储气罐与所述锅炉相连接。本发明利用天然气的压差能来发电并同时获得压缩空气能、冷能、热能。(The invention discloses a natural gas pressure difference energy compressed air energy storage system which comprises a natural gas turbine, a motor and an air compressor, wherein the natural gas turbine is connected with the motor, the air compressor is connected with the motor, the air outlet end of the natural gas turbine is sequentially connected with a cold-heat exchanger, a boiler, a gas turbine and a generator, the air inlet end of the natural gas turbine is externally connected with a heat accumulator, the heat accumulator is connected with the gas turbine, the outlet of the air compressor is sequentially connected with a cooling dehumidifier, a filtering dryer and a high-pressure air storage tank, and the high-pressure air storage tank is connected with the boiler. The invention utilizes the pressure difference energy of the natural gas to generate electricity and obtain compressed air energy, cold energy and heat energy at the same time.)

1. The utility model provides a natural gas pressure differential can compressed air energy storage system, its characterized in that, includes natural gas turbine (1), motor (6) and air compressor machine (8), natural gas turbine (1) with motor (6) are connected, air compressor machine (8) with motor (6) are connected, natural gas turbine (1) give vent to anger the end and have connected gradually cold and hot exchanger (2), boiler (17), gas turbine (18) and generator (19), natural gas turbine (1) external heat accumulator (11) of inlet end, heat accumulator (11) with gas turbine (18) are connected, air compressor machine (8) export has connected gradually cooling dehumidifier (9), filter drier (12) and high-pressure gas holder (14), high-pressure gas holder (14) with boiler (17) are connected.

2. The natural gas pressure difference energy compressed air energy storage system according to claim 1, wherein: the motor (6) is a permanent magnet motor, a first clutch (4) is arranged between the motor (6) and the natural gas turbine (1), a second clutch (5) is arranged between the motor (6) and the air compressor (8), and the motor (6) is externally connected with a power supply (7).

3. The natural gas pressure difference energy compressed air energy storage system according to claim 1, wherein: a first stop valve (13) is arranged between the filtering dryer (12) and the high-pressure air storage tank (14), a reversing valve (15) is arranged between the high-pressure air storage tank (14) and the boiler (17), and the reversing valve (15) is additionally connected with a second stop valve (16).

4. The natural gas pressure difference energy compressed air energy storage system according to claim 1, wherein: a flow dividing valve (3) is arranged between the cold-heat exchanger (2) and the boiler (17).

5. The natural gas pressure difference energy compressed air energy storage system according to claim 1, wherein: the cooling dehumidifier (9) is externally connected with a hot water heater (10).

6. A natural gas pressure differential energy compressed air energy storage system as claimed in claim 5, wherein: the heat accumulator (11) is connected with the hot water heater (10).

Technical Field

The invention relates to the field of natural gas pressure difference energy and energy storage, in particular to a cold, heat and electricity triple supply system for natural gas pressure difference energy.

Background

In recent years, a throttling valve adopted in a natural gas pressure regulating process has the problem of energy waste, and an existing natural gas cooling, heating and power triple supply system also has the problem of low energy utilization rate. Therefore, a new solution is now needed.

Disclosure of Invention

In order to solve the problems, the invention discloses a natural gas pressure difference energy compressed air energy storage system, wherein a natural gas turbine replaces a throttle valve to recover pressure difference energy of natural gas and is used for generating power and obtaining compressed air energy, and the system is different from a traditional natural gas cooling, heating and power triple supply system, can generate cold, heat and power and can supply compressed air to industrial users, and the energy utilization rate is improved.

In order to achieve the above purpose, the invention provides the following technical scheme: the utility model provides a natural gas pressure differential can compressed air energy storage system, includes natural gas turbine, motor and air compressor machine, natural gas turbine with the motor is connected, the air compressor machine with the motor is connected, natural gas turbine gives vent to anger the end and has connected gradually cold and hot exchanger, boiler, gas turbine and generator, the external heat accumulator of natural gas turbine inlet end, the heat accumulator with gas turbine is connected, the air compressor machine export has connected gradually cooling dehumidifier, filter drier and high-pressure gas holder, high-pressure gas holder with the boiler is connected. The inlet of the natural gas turbine is connected with the outlet at one end of the heat accumulator, and the outlet of the gas turbine is connected with the inlet at one end of the heat accumulator.

As an improvement of the invention, the motor is a permanent magnet motor, a first clutch is arranged between the motor and the natural gas turbine, a second clutch is arranged between the motor and the air compressor, and the motor is externally connected with a power supply. The power supply is a storage battery.

As an improvement of the invention, a first stop valve is arranged between the filter dryer and the high-pressure gas storage tank, a reversing valve is arranged between the high-pressure gas storage tank and the boiler, and the reversing valve is additionally connected with a second stop valve.

As an improvement of the present invention, a flow dividing valve is provided between the cold heat exchanger and the boiler.

As an improvement of the invention, the cooling dehumidifier is externally connected with a hot water heater.

As a refinement of the invention, the heat accumulator is connected to the hot water heater.

Compared with the prior art, the invention has the following advantages: the invention is suitable for natural air pressure difference energy recovery and energy storage, the generated compressed air can be directly canned for sale on one hand, and on the other hand, the compressed air can be mixed with high-pressure natural gas of a door station and then enters a boiler for combustion, and then enters a gas turbine for expansion and work application to drive a generator to generate electricity, the generated electric energy is sold to a power grid, and the energy utilization rate is improved.

Drawings

FIG. 1 is a schematic diagram of a natural gas pressure differential energy compressed air energy storage system according to the present invention;

list of reference numerals: 1. a natural gas turbine; 2. a cold-heat exchanger; 3. a flow divider valve; 4. a first clutch; 5. a second clutch; 6. a motor; 7. a power source; 8. an air compressor; 9. cooling the dehumidifier; 10. a hot water heater; 11. a heat accumulator; 12. a filter dryer; 13. a first shut-off valve; 14. a high pressure gas storage tank; 15. a diverter valve; 16. a second stop valve; 17. a boiler; 18. a gas turbine; 19. an electric generator.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

Referring to fig. 1, the natural gas expansion process is as follows: the high-pressure natural gas is preheated by the heat accumulator 11 and then enters the natural gas turbine 1 to be expanded, and the expanded low-temperature natural gas is heated by the cooling heat exchanger 2 and then flows out.

Referring to fig. 1, the flow of the compressed air is as follows: the air at normal temperature and normal pressure is compressed by an air compressor 8, cooled and dehumidified by a cooling dehumidifier 9, and then enters a high-pressure air storage tank 14 for storage after passing through a filter dryer 12.

Referring to fig. 1, there are two ways of releasing energy from the compressed air in the high pressure air tank 14: one is directly canned and sold through a reversing valve 15 and a second stop valve 16; the other is that the high-pressure natural gas is mixed with the high-pressure natural gas of the door station through a reversing valve 15, enters a boiler 17 for combustion, then enters a gas turbine 18 for expansion and work doing, drives a generator 19 for power generation, and sells the generated electric energy to a power grid.

Referring to fig. 1, the heating process is as follows: the cooling water absorbs the heat of the high-temperature compressed air at the outlet of the air compressor 8 in the cooling dehumidifier 9, then enters the heater 10, is heated by the tail gas of the gas turbine 18 at the outlet of the heat accumulator 11, and then is sent to a user for heat supply.

Referring to fig. 1, the cooling process is: the cooling water is cooled by the expanded natural gas in the cooling heat exchanger 2, and then is sent to a user for refrigeration.

The inlet of the natural gas turbine 1 is connected with the outlet at one end of the heat accumulator 11, the outlet of the gas turbine 18 is connected with the inlet at one end of the heat accumulator 11, and the high-pressure natural gas entering the natural gas turbine 1 is preheated by utilizing the waste heat of the gas turbine 18.

The motor 6 is externally connected with a power supply 7, and the motor 6 can drive the natural gas turbine 1 and the air compressor 8 to operate respectively through the first clutch 4 and the second clutch 5.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.