CN217300788U

CN217300788U - Reheating type photo-thermal and steam combined cycle power generation system

Info

Publication number: CN217300788U
Application number: CN202221197939.8U
Authority: CN
Inventors: 王于蓝; 束国刚; 米文真; 顾春伟; 吕煊; 田东旭
Original assignee: China United Heavy Gas Turbine Technology Co Ltd
Current assignee: China United Heavy Gas Turbine Technology Co Ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-08-26
Anticipated expiration: 2032-05-18

Abstract

The utility model provides a reheat formula light and heat and steam combined cycle power generation system, reheat formula light and heat and steam combined cycle power generation system includes: gas power generation facility, steam cycle power generation facility and light and heat transfer device, gas power generation facility includes first turbine, the second turbine, communicating pipe and first generator, communicating pipe intercommunication first pass through with the second turbine, communicating pipe includes first mouthful and second mouth, first pass through with the second pass through on average and link to each other with first generator, steam cycle power generation facility includes exhaust-heat boiler, steam turbine and second generator, exhaust-heat boiler includes inlet flue and steam outlet, inlet flue passes through vent line and links to each other with the second turbine, the steam outlet links to each other with the inlet flue of steam turbine, light and heat transfer device includes flue gas inlet and exhanst gas outlet, flue gas inlet links to each other with first mouthful, the exhanst gas outlet links to each other with the second import. The utility model discloses a reheating formula light and heat and steam combined cycle power generation system has simple structure, and fuel uses few advantage.

Description

Reheating type photo-thermal and steam combined cycle power generation system

Technical Field

The utility model relates to a gas-steam combined cycle power generation technical field specifically, relates to a reheat formula light and heat and steam combined cycle power generation system.

Background

In a gas-steam combined cycle power generation system, in order to improve the single-machine output power of a gas turbine in order to improve the power generation efficiency, a reheat combustion chamber is often added between a high-pressure turbine and a medium-pressure turbine in the related art, wherein the reheat combustion chamber mostly uses non-renewable energy such as natural gas as fuel, and the use of the fuel is increased. In addition, the gas turbine also complicates the power generation system too much for flow matching and balancing due to the addition of the combustor.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent.

Therefore, the embodiment of the present invention provides a reheating type photo-thermal and steam combined cycle power generation system, which has the advantages of simple structure and less fuel consumption.

The utility model discloses reheat formula light and heat and steam combined cycle power generation system includes: a gas power generation apparatus including a gas turbine assembly and a first generator, the gas turbine assembly including a first turbine, a second turbine, and a communication pipe connected between and communicating the first turbine and the second turbine, the communication pipe including a first port and a second port, the first port being located upstream of the second port, the first turbine and the second turbine being connected to the first generator so as to drive the first generator; the steam cycle power generation device comprises a waste heat boiler, a steam turbine and a second power generator, wherein the waste heat boiler comprises a smoke inlet and a steam outlet, the smoke inlet is connected with the second turbine through a ventilation pipeline so that smoke exhausted by the second turbine is introduced into the waste heat boiler, the ventilation pipeline is further provided with a first inlet and a second inlet, the first inlet is located at the upstream of the second inlet, the steam outlet is connected with the steam inlet of the steam turbine, and the steam turbine is used for driving the second power generator to generate power; and the photo-thermal heat exchange device comprises a smoke inlet and a smoke outlet, the smoke inlet is connected with the first port of the communicating pipe and one of the first inlets of the ventilation pipeline, and the smoke outlet is connected with the second port of the communicating pipe and one of the second inlets of the ventilation pipeline.

The utility model discloses reheating formula light and heat and steam combined cycle power generation system passes through light and heat transfer device, with in rethread gas power generation facility or the steam cycle power generation facility behind the flue gas heating to improve the generating efficiency, avoided increasing the combustion chamber, simplified this combined cycle power generation system. In addition, under the condition that the generated energy is the same, the utility model discloses the combined cycle power generation system of reheat formula light and heat and steam uses less fuel.

Therefore, the utility model discloses reheating formula light and heat and steam combined cycle power generation system has simple structure, and the fuel uses few advantage.

In some embodiments, the flue gas inlet is connected to the first port of the communication tube and the flue gas outlet is connected to the second inlet of the communication tube.

In some embodiments, the photothermal heat exchange device comprises a solar heat collecting assembly, the solar heat collecting assembly comprises a metal pipe, one end of the metal pipe is connected with the smoke inlet, the other end of the metal pipe is connected with the smoke outlet, and the outer wall surface of the metal pipe is coated with a selective absorption coating.

In some embodiments, the solar energy collection assembly further comprises a glass tube sleeved outside the metal tube.

In some embodiments, an annular cavity is provided between the glass tube and the metal tube, and the annular cavity is a vacuum cavity.

In some embodiments, the gas turbine assembly further comprises a compressor, a combustor, and the compressor, the combustor, and the first turbine are connected in series, the compressor is configured to absorb and compress air, and the combustor is configured to combust the compressed air with fuel and generate high-temperature and high-pressure gas.

In some embodiments, the compressor, the first turbine and the second turbine are co-rotating.

In some embodiments, the steam cycle power generation device further comprises a condenser and a water feed pump, the condenser comprises a steam inlet and a water discharge port, the waste heat boiler comprises a water injection port, the water feed pump comprises a water inlet and a water outlet, the steam inlet is connected with an exhaust port of the steam turbine, the water discharge port of the condenser is connected with the water inlet of the water feed pump, and the water discharge port of the condenser is connected with the water injection port.

Drawings

Fig. 1 is a schematic structural diagram of a reheat combined cycle solar-thermal and steam power generation system according to an embodiment of the present invention.

Reference numerals:

a vent line 100;

a gas power generation device 1; a compressor 11; a combustion chamber 12; a first turbine 13; a second turbine 14; a communicating pipe 15; a first port 151; a second port 152; a first generator 16;

a steam cycle power plant 2; a waste heat boiler 21; a smoke inlet 211; a steam discharge port 212; a water injection port 213; a smoke exhaust port 214; a steam turbine 22; a steam inlet 221; a vapor outlet 222; a second generator 23; a condenser 24; a steam inlet 241; a drain port 242; a feed pump 25; a water inlet 251; a water outlet 252;

a photothermal heat exchange device 3; a flue gas inlet 31; a flue gas outlet 32; a metal tube 33.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1, the utility model discloses reheat formula light and heat and steam combined cycle power generation system of embodiment includes: the system comprises a gas power generation device 1, a steam circulation power generation device 2 and a photo-thermal heat exchange device 3.

The gas power generation apparatus 1 includes a gas turbine assembly including a first turbine 13, a second turbine 14, and a connection pipe 15, the connection pipe 15 being connected between the first turbine 13 and the second turbine 14 and connecting the first turbine 13 and the second turbine 14, the connection pipe 15 including a first port 151 and a second port 152, the first port 151 being located upstream of the second port 152, the first turbine 13 and the second turbine 14 each being connected to the first power generator 16 so as to drive the first power generator 16.

Specifically, as shown in fig. 1, the first turbine 13 is a high-pressure turbine, and the second turbine 14 is a medium-pressure turbine, that is, the high-temperature flue gas firstly passes through the first turbine 13 to drive the first motor to generate power, and the flue gas after expansion work is introduced into the second turbine 14 through the communicating pipe 15 to drive the first generator 16 to generate power, so as to better utilize the flue gas at different temperatures to generate power.

It can be understood that the output shafts of the first turbine 13 and the second turbine 14 are connected to the rotating shaft of the first generator 16, so that when the output shafts of the first turbine 13 and the second turbine 14 are driven to rotate, the rotating shaft of the first generator 16 is driven to rotate, thereby realizing the power generation function

The steam cycle power generation device 2 comprises a waste heat boiler 21, a steam turbine 22 and a second power generator 23, wherein the waste heat boiler 21 comprises a smoke inlet 211 and a steam outlet 212, the smoke inlet 211 is connected with the second turbine 14 through a ventilation pipeline 100 so that smoke exhausted by the second turbine 14 is introduced into the waste heat boiler 21, the ventilation pipeline 100 is further provided with a first inlet and a second inlet, the first inlet is located at the upstream of the second inlet, the steam outlet 212 is connected with a steam inlet 221 of the steam turbine 22, and the steam turbine 22 is used for driving the second power generator 23 to generate power.

Specifically, the flue gas introduced into the waste heat boiler 21 is used for heating the water in the waste heat boiler 21 so as to heat the water into steam, and the steam enters the steam turbine 22 through the steam outlet 212 so as to drive the second generator 23 to generate electricity, so that the combined power generation of the gas turbine and the steam is realized. The exhaust-heat boiler 21 further includes a smoke outlet 214, and the smoke outlet 214 is used for discharging smoke, that is, the smoke in the exhaust-heat boiler 21 after exchanging heat with water is discharged through the smoke outlet 214.

The photothermal heat exchange device 3 comprises a flue gas inlet 31 and a flue gas outlet 32, wherein the flue gas inlet 31 is connected with one of the first port 151 of the communicating pipe 15 and the first inlet of the ventilation pipeline 100, and the flue gas outlet 32 is connected with one of the second port 152 of the communicating pipe 15 and the second inlet of the ventilation pipeline 100.

It will be appreciated that when the flue gas inlet 31 is connected to the first port 151 of the communicating tube 15, the flue gas outlet 32 is connected to the second port 152 of the communicating tube 15, or alternatively, the flue gas outlet 32 is connected to the second inlet of the ventilation circuit 100. When the smoke inlet 31 is connected to the first inlet of the ventilation duct 100, the smoke outlet 32 is connected to the second port 152 of the connection pipe 15, or alternatively, the smoke outlet 32 is connected to the second inlet of the ventilation duct 100.

Wherein, when the flue gas inlet 31 links to each other with the first mouth 151 of communicating pipe 15, the exhanst gas outlet 32 links to each other with the second mouth 152 of communicating pipe 15, or, when the flue gas inlet 31 links to each other with the first import of ventilation pipeline 100, the exhanst gas outlet 32 links to each other with the second mouth 152 of communicating pipe 15, the exhaust flue gas of first turbine 13 or second turbine 14 can be heated to light and heat transfer device 3 to the flue gas after will heating lets in second turbine 14 in order to drive first generator 16 electricity generation, that is to say, the flue gas after heating through light and heat transfer device 3 is more convenient for the inflation to do work and generate electricity, and then improve generating efficiency.

When the flue gas inlet 31 is connected to the first inlet of the ventilation pipeline 100, the flue gas outlet 32 is connected to the second inlet of the ventilation pipeline 100, or, when the flue gas inlet 31 is connected to the first port 151 of the communicating pipe 15, the flue gas outlet 32 is connected to the second inlet of the ventilation pipeline 100, the photothermal heat exchange device 3 can heat the flue gas exhausted by the first turbine 13 or the second turbine 14, and the heated flue gas is introduced into the exhaust-heat boiler 21, so that the efficiency of heating water into steam by the exhaust-heat boiler 21 is improved, and the power generation efficiency of the second power generator 23 is further improved.

Therefore, the utility model discloses reheating formula light and heat and steam combined cycle power generation system passes through light and heat transfer device 3, with in rethread gas power generation facility 1 or the steam cycle power generation facility 2 after the flue gas heating to improve generating efficiency, avoided increasing combustion chamber 12, simplified this combined cycle power generation system. In addition, under the same condition of generated energy, the utility model discloses the fuel that the combined cycle power generation system of reheat formula light and heat and steam used is less.

Preferably, the flue gas inlet 31 is connected to the first port 151 of the connection pipe 15, and the flue gas outlet 32 is connected to the second inlet of the connection pipe 15.

In some embodiments, as shown in fig. 1, the photothermal heat exchange device 3 comprises a solar heat collecting assembly, the solar heat collecting assembly comprises a metal pipe 33, one end of the metal pipe 33 is connected with the flue gas inlet 31, the other end of the metal pipe 33 is connected with the flue gas outlet 32, and the outer wall surface of the metal pipe 33 is coated with a selective absorption coating.

Specifically, the metal tube 33 communicates the flue gas inlet 31 and the flue gas outlet 32, so that the flue gas can enter the metal tube 33 through the flue gas inlet 31, that is, the photothermal heat exchange device 3 can heat the metal tube 33 by using sunlight, thereby heating the flue gas in the metal tube 33.

It is understood that the selective absorption coating layer coated on the outer wall surface of the metal tube 33 is more advantageous to heat the metal tube 33 by using sunlight to improve the heat absorption efficiency.

Optionally, the solar collector assembly further comprises a glass tube, which is sleeved outside the metal tube 33. It can be understood that the glass tube sleeved on the metal tube 33 can effectively inhibit heat conduction loss, thereby ensuring the self temperature of the metal tube 33 and avoiding the metal tube 33 from dissipating heat too fast.

Preferably, an annular cavity is formed between the glass tube and the metal tube 33, and the annular cavity is a vacuum cavity. That is, the annular cavity is in a vacuum state, and convection and conduction heat loss in the annular cavity can be suppressed, so that the self temperature of the metal pipe 33 can be further ensured, and heat loss of the metal pipe 33 can be reduced.

Furthermore, the utility model discloses reheating formula light and heat and steam combined cycle power generation system's light and heat transfer device 3 is used for collecting solar heat energy to heating tubular metal resonator 33. Wherein, the collection of solar heat energy can be carried out in various ways, such as: slot type, tower or butterfly etc. that is to say, the utility model discloses the light and heat transfer device 3 of reheat formula light and heat and steam combined cycle power generation system of embodiment can be according to actual environment to the form that adopts different settings is in order to carry out the collection of solar heat energy.

In some embodiments, the gas turbine assembly further comprises a compressor 11 and a combustor 12, the compressor 11, the combustor 12 and the first turbine 13 being connected in series, the compressor 11 being configured to absorb and compress air, and the combustor 12 being configured to combust the compressed air with fuel and generate high temperature and high pressure gas.

Specifically, as shown in fig. 1, a compressor 11 absorbs and compresses air, and then the compressed air is introduced into a combustion chamber 12 to provide air required for fuel combustion for the combustion chamber 12, after the fuel in the combustion chamber 12 is combusted, high-temperature and high-pressure gas is generated, and the gas is introduced into a first turbine 13 to be used for expansion work, so as to drive a first generator 16 to generate electricity.

Preferably, the compressor 11, the first turbine 13 and the second turbine 14 are arranged coaxially. It can be understood that the compressor 11, the first turbine 13 and the second turbine 14 are disposed on the same main shaft, that is, during operation, the compressor 11 is first driven by an external motor, the compressor 11 is started to provide compressed air to the combustion chamber 12, and then high-temperature gas is provided to the first turbine 13 and the second turbine 14, and the first turbine 13 and the second turbine 14 do work by expansion to drive the main shaft to rotate, that is, when the first turbine 13 and the second turbine 14 start to operate, the compressor 11 can be driven to rotate, so that long-term use of the external motor is avoided.

In some embodiments, the steam cycle power generating apparatus 2 further includes a condenser 24 and a feed water pump 25, the condenser 24 includes a steam inlet 241 and a water discharge port 242, the exhaust heat boiler 21 includes a water injection port 213, the feed water pump 25 includes a water inlet 251 and a water outlet 252, the steam inlet 241 is connected to an exhaust port of the steam turbine 22, the water discharge port 242 of the condenser 24 is connected to the water inlet 251 of the feed water pump 25, and the water discharge port 242 of the condenser 24 is connected to the water injection port 213.

Specifically, as shown in fig. 1, the steam turbine 22, the condenser 24, the feed water pump 25 and the exhaust heat boiler 21 are sequentially connected through a pipeline, that is, the steam outlet 222 of the steam turbine 22 is connected with the steam inlet 241 of the condenser 24 through a pipeline, the water outlet 242 of the condenser 24 is connected with the water inlet 251 of the feed water pump 25 through a pipeline, and the water outlet 252 of the condenser 24 is connected with the water injection port 213 of the exhaust heat boiler 21 through a pipeline.

That is to say, after the steam in the steam turbine 22 expands and works, the steam is discharged into the condenser 24 through the steam outlet 222, the condenser 24 can cool and liquefy the steam into condensed water, then the condensed water is introduced into the water feed pump 25, the condensed water in the water feed pump 25 can be introduced into the exhaust-heat boiler 21 through the water injection port 213 by the water feed pump 25, so as to exchange heat with the flue gas in the exhaust-heat boiler 21, and thus the steam cycle power generation is realized.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although the above embodiments have been shown and described, it should be understood that they are exemplary and should not be construed as limiting the present invention, and that many changes, modifications, substitutions and alterations to the above embodiments by those of ordinary skill in the art are intended to be within the scope of the present invention.

Claims

1. A reheat combined cycle solar-thermal and steam power generation system, comprising:

a gas power generation apparatus including a gas turbine assembly and a first generator, the gas turbine assembly including a first turbine, a second turbine, and a communication pipe connected between and communicating the first turbine and the second turbine, the communication pipe including a first port and a second port, the first port being located upstream of the second port, the first turbine and the second turbine being connected to the first generator so as to drive the first generator;

the steam cycle power generation device comprises a waste heat boiler, a steam turbine and a second power generator, wherein the waste heat boiler comprises a smoke inlet and a steam outlet, the smoke inlet is connected with the second turbine through a ventilation pipeline so that smoke exhausted by the second turbine is introduced into the waste heat boiler, the ventilation pipeline is further provided with a first inlet and a second inlet, the first inlet is located at the upstream of the second inlet, the steam outlet is connected with the steam inlet of the steam turbine, and the steam turbine is used for driving the second power generator to generate power; and

the photo-thermal heat exchange device comprises a smoke inlet and a smoke outlet, the smoke inlet is connected with the first port of the communicating pipe and one of the first inlets of the ventilating pipeline, and the smoke outlet is connected with the second port of the communicating pipe and one of the second inlets of the ventilating pipeline.

2. The combined reheated solar thermal and steam cycle power generating system of claim 1, wherein said flue gas inlet is connected to said first port of said communicating tube and said flue gas outlet is connected to said second inlet of said communicating tube.

3. The reheat combined cycle photothermal and steam power system of claim 2 wherein the photothermal heat exchange device comprises a solar heat collection assembly, the solar heat collection assembly comprises a metal tube, one end of the metal tube is connected to the flue gas inlet, the other end of the metal tube is connected to the flue gas outlet, and the outer wall surface of the metal tube is coated with a selective absorption coating.

4. The reheat combined heat and steam cycle power system of claim 3, wherein the solar collector assembly further comprises a glass tube sleeved outside the metal tube.

5. The reheat combined heat and steam cycle power system of claim 4, wherein an annular cavity is provided between the glass tube and the metal tube, the annular cavity being a vacuum cavity.

6. The reheat combined heat and steam cycle power system of claim 1, wherein the gas turbine assembly further comprises a compressor and a combustor, the compressor, the combustor and the first turbine being connected in series, the compressor being configured to absorb and compress air, and the combustor being configured to combust the compressed air with fuel and generate high temperature and high pressure gas.

7. The reheat combined heat and steam cycle power system of claim 6, wherein the compressor, the first turbine and the second turbine are co-rotating.

8. The combined reheated photothermal and steam power generation system according to claim 1, wherein said steam cycle power generation unit further comprises a condenser and a water feed pump, said condenser comprises a steam inlet and a water outlet, said waste heat boiler comprises a water injection port, said water feed pump comprises a water inlet and a water outlet, said steam inlet is connected to said exhaust port of said steam turbine, said water outlet of said condenser is connected to said water inlet of said water feed pump, and said water outlet of said condenser is connected to said water injection port.