CN218721413U - Coal-fired boiler quick start-up system of coupling gas turbine drive electric heating - Google Patents
Coal-fired boiler quick start-up system of coupling gas turbine drive electric heating Download PDFInfo
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- CN218721413U CN218721413U CN202222915587.1U CN202222915587U CN218721413U CN 218721413 U CN218721413 U CN 218721413U CN 202222915587 U CN202222915587 U CN 202222915587U CN 218721413 U CN218721413 U CN 218721413U
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Abstract
The application discloses coupling gas turbine drives coal fired boiler quick start-up system of electric heating includes: the coal-fired boiler equipment comprises a boiler body, and a steam-water separator and a low-temperature superheater header which are respectively connected with the boiler body; the gas turbine driving electric heating equipment is connected between the outlet of the steam-water separator and the inlet of the low-temperature superheater header through a pipeline, the gas turbine driving electric heating equipment is suitable for heating separated water separated from the steam-water separator, and the heated separated water enters the low-temperature superheater header. The separated water separated by the steam-water separator is driven by the gas turbine to be rapidly heated into steam by the electric heating equipment, so that the steam quantity required by the starting of the coal-fired boiler starting system can be rapidly supplemented, the dry-wet state conversion speed of the coal-fired boiler starting system is improved, the coal-fired boiler starting system can be rapidly started, and the flexibility of the coal-fired gas turbine generator set is improved.
Description
Technical Field
The application relates to the technical field of coal-fired boilers, in particular to a coal-fired boiler quick start-up system with coupling gas turbine driving electric heating.
Background
Under the background of green and low-carbon transformation of energy, new energy enters a large-scale rapid development stage, and the access of high-proportion new energy becomes the development trend and important characteristics of future electric power systems in China. However, as the proportion of wind power and photovoltaic power generation in the power system is increased day by day and becomes a main part, the obvious characteristics of randomness, intermittency and volatility of renewable energy sources bring great challenges to the stability and safety of the power system. Coal-fired power generation is the main body of the peak regulation power supply in China, and the improvement of the operation flexibility is the most urgent technical requirement for coal-fired power generation.
In the starting process of the supercritical coal-fired boiler, the supercritical coal-fired boiler is required to be subjected to working medium wet-state operation working conditions from ultra-low load to high load. At present, a supercritical coal-fired boiler starting system is generally provided with a boiler water circulating pump and is used for conveying unsaturated water in a separator water tank to an inlet of a boiler water-cooled wall for reheating in the boiler starting process, however, a steam-water circulating flow is increased, so that the dry-wet conversion speed of the coal-fired boiler starting system is low, and the flexibility of a coal-fired gas turbine generator set is limited.
In view of the deficiencies in the prior art, there is a need for a rapid start-up system for coal fired boilers.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the application is to overcome the defects that the dry-wet state conversion speed of the coal-fired boiler starting system in the prior art is slow, and the flexibility of a coal-fired gas turbine generator set is limited, so that the coal-fired boiler quick starting system with coupling gas turbine driving electric heating is provided.
In order to solve the technical problem, the technical scheme of the application is as follows:
a coupled gas turbine driven electrically heated coal fired boiler rapid start system comprising:
the coal-fired boiler equipment comprises a boiler body, and a steam-water separator and a low-temperature superheater header which are respectively connected with the boiler body;
the gas turbine driving electric heating equipment is connected between the outlet of the steam-water separator and the inlet of the low-temperature superheater header through a pipeline, the gas turbine driving electric heating equipment is suitable for heating separated water separated from the steam-water separator, and the heated separated water enters the low-temperature superheater header.
Further, the gas turbine driven electric heating apparatus includes a compressor, a gas turbine, a combustion chamber between the compressor and the gas turbine, a generator connected to the gas turbine and driven by the gas turbine to generate electricity, and an electric boiler electrically connected to the generator, the electric boiler being adapted to heat the separated water.
Furthermore, the pipeline comprises a main pipeline, an electric heating water inlet pipeline and an electric heating water outlet pipeline which are connected with the main pipeline, the main pipeline is suitable for providing a channel for the separated water to enter the low-temperature superheater header from the steam-water separator, and the electric boiler is connected between the electric heating water inlet pipeline and the electric heating water outlet pipeline.
Furthermore, be equipped with the electrical heating control valve on the electric heater inlet channel, the trunk line on in the entry of electrical heating inlet channel with be equipped with the ooff valve between the export of electrical heating outlet conduit, the electrical heating control valve with the ooff valve alternative is opened.
Furthermore, a waste heat exchanger is connected between the steam-water separator and the inlet of the water inlet pipeline of the heater on the main pipeline, and the waste heat exchanger is connected with a steam extraction port of the gas turbine through a steam pipeline.
Furthermore, a bypass valve and a bypass water pump are sequentially connected between the steam-water separator and the waste heat exchanger on the main pipeline, and the bypass valve is close to the steam-water separator compared with the bypass water pump.
This application technical scheme has following advantage:
1. the application provides a pair of coal fired boiler quick start system of coupling gas turbine drive electric heating, the separation water that the catch water separated is driven electric heating equipment rapid heating by gas turbine and becomes steam, and then can supply coal fired boiler starting system required steam volume when starting fast, has improved coal fired boiler starting system's wet-dry state's slew velocity for coal fired boiler starting system can quick start, and then has improved coal fired gas turbine generating set's flexibility.
2. The application provides a pair of coal fired boiler quick start system of coupling gas turbine drive electric heating, gas turbine's extraction steam outlet exhaust steam heatable passes through waste heat exchanger's separation water, lets the separation water obtain the primary heating, has further improved the rate of heating of separation water.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a rapid start-up system of a coal-fired boiler coupled with gas turbine driven electric heating according to the present application.
Description of reference numerals:
11. a boiler body; 12. a steam-water separator; 13. a low temperature superheater; 21. a bypass valve; 22. a bypass water pump; 23. a compressor; 24. a combustion chamber; 25. a gas turbine; 26. a waste heat exchanger; 27. a generator; 31. an electric boiler; 32. an electrically heated control valve; 33. an on-off valve; 34. a low temperature superheater header; a. a main pipeline; b. electrically heating the water inlet pipe; c. an electrically heated water outlet pipe; d. a steam pipeline.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.
Examples
As shown in fig. 1, the present embodiment provides a rapid start-up system of a coal-fired boiler coupled with gas turbine driven electric heating, adapted to increase the start-up speed of the coal-fired boiler, particularly of a supercritical pi-type coal-fired boiler, comprising a coal-fired boiler plant and a gas turbine driven electric heating plant.
The coal-fired boiler equipment comprises a boiler body 11, a steam-water separator 12 and a low-temperature superheater header 34 which are respectively connected with the boiler body 11, wherein the low-temperature superheater header 34 is connected with a low-temperature superheater 13. The steam-water separator 12 is used to separate water entrained in the steam. For the sake of convenience of the following description, in the present embodiment, the water separated by the steam separator 12 is referred to as separated water.
The gas turbine driving electric heating equipment is connected between the outlet of the steam-water separator 12 and the inlet of the low-temperature superheater header 34 through a pipeline, the gas turbine driving electric heating equipment is suitable for heating the separated water separated from the steam-water separator 12, and the heated separated water enters the low-temperature superheater header 34. Specifically, the gas turbine driven electric heating apparatus includes a light duty gas turbine including a compressor 23, a gas turbine 25, and a combustor 24 between the compressor 23 and the gas turbine 25, a generator 27, and an electric boiler 31. The generator 27 is connected to the gas turbine 25 and driven by the gas turbine to generate electricity, and the electric boiler 31 is electrically connected to the generator 27, the electric boiler 31 being adapted to heat and separate water.
The pipelines comprise a main pipeline a, an electric heating water inlet pipeline b and an electric heating water outlet pipeline c, wherein the electric heating water inlet pipeline b and the electric heating water outlet pipeline c are respectively connected with the main pipeline a. The main pipeline a is suitable for providing a passage for separated water to enter the low-temperature superheater header 34 from the steam-water separator 12, the electric heating water inlet pipeline b and the electric heating water outlet pipeline c are located on the same side of the main pipeline a, and the electric boiler 31 is conveniently connected between the electric heating water inlet pipeline b and the electric heating water outlet pipeline c. The electric heater water inlet pipe b is provided with an electric heating control valve 32, and the electric heating control valve 32 is opened when needed, so that the separated water enters the electric boiler 31 through the electric heating water inlet pipe b to be heated. And a switch valve 33 is arranged on the main pipeline a between the inlet of the electric heating water inlet pipeline b and the outlet of the electric heating water outlet pipeline c, the switch valve 33 is in a normally open state, and the switch valve 33 is closed only when the electric heating control valve 32 is opened.
In addition, be connected with waste heat exchanger 26 between the entry of steam-water separator 12 and electrical heating inlet channel b on trunk line a, waste heat exchanger 26's steam inlet passes through steam conduit d with gas turbine 25's steam extraction mouth and links to each other, steam from gas turbine 25's steam extraction mouth exhaust gets into waste heat exchanger 26 via steam conduit d, the separation water is heated by the steam primary who gets into waste heat exchanger 26, the separation water through primary heating continues to heat in trunk line a and the electrical heating inlet channel b gets into electric boiler 31, can further improve the rate of heating of separation water. Furthermore, a bypass valve 21 and a bypass water pump 22 are connected in sequence between the steam-water separator 12 and the waste heat exchanger 26 in the main pipe a, and the bypass valve 21 is closer to the steam-water separator 12 than the bypass water pump 22.
The operation of the coal-fired boiler rapid start-up system coupled with the gas turbine driving electric heating in this embodiment is described as follows:
in a normal working state, steam from the boiler body 11 enters the steam-water separator 12, and water in the steam is separated to form separated water;
separated water sequentially passes through a bypass valve 21, a bypass water pump 22, a waste heat exchanger 26 and a switch valve 33 along a main pipeline a and enters a low-temperature superheater header 34;
when a peak load is encountered and the coal-fired boiler equipment needs to be started quickly, a gas turbine is started to drive electric heating equipment, specifically, a light gas turbine is started, a gas compressor 23 supplies gas to a combustion chamber 24, fuel is combusted in the combustion chamber 24, the gas turbine 25 rotates, the gas turbine 25 drives a generator 27 to generate electricity, the generator 27 supplies power to an electric boiler 31, an electric heating control valve 32 is opened, and meanwhile, a switch valve 33 is closed;
the separated water passes through the bypass valve 21 and the bypass water pump 22 in sequence along the main pipeline a, then is primarily heated by steam exhausted from a steam extraction port of the gas turbine 25 in the waste heat exchanger 26, the separated water after primary heating continues to flow along the main pipeline a, then enters the electric boiler 31 along the electric heating water inlet pipeline b, flows out through the electric heating water outlet pipeline c after being heated by the electric boiler 31 and enters the main pipeline a again, and then enters the low-temperature superheater header tank 34.
In this embodiment, the separated water is not required to enter the water wall inlet of the coal-fired boiler for reheating, but is quickly heated by the electric boiler 31 to become steam, so that the amount of steam required by the starting system of the coal-fired boiler during starting can be quickly supplemented, the dry-wet state conversion speed of the starting system of the coal-fired boiler is increased, the starting speed of the coal-fired boiler is increased, and finally the flexibility of the coal-fired gas turbine generator set is increased.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications of the invention are intended to be covered by the present invention.
Claims (6)
1. A coupled gas turbine driven electrically heated coal fired boiler rapid start system comprising:
the coal-fired boiler equipment comprises a boiler body (11), and a steam-water separator (12) and a low-temperature superheater header (34) which are respectively connected with the boiler body (11);
the gas turbine drives the electric heating equipment, connect through the pipeline between the export of catch water (12) and the entry of low temperature over heater collection case (34), gas turbine drives the electric heating equipment and is suitable for heating from the separation water that catch water (12) separated, after the heating separation water is suitable for entering in low temperature over heater collection case (34).
2. A rapid start-up system of a coal-fired boiler coupled with electric heating of gas turbine driving according to claim 1, characterized in that the gas turbine driving electric heating apparatus comprises a compressor (23), a gas turbine (25), a combustion chamber (24) between the compressor (23) and the gas turbine (25), a generator (27) connected with the gas turbine (25) and driven by it to generate electricity, and an electric boiler (31) electrically connected with the generator (27), the electric boiler (31) being adapted to heat the separated water.
3. A rapid start-up system of a coal-fired boiler coupled with electric heating of gas turbine driving according to claim 2, characterized in that the pipeline comprises a main pipeline (a), an electric heating water inlet pipeline (b) and an electric heating water outlet pipeline (c) respectively connected with the main pipeline (a), the main pipeline (a) is suitable for providing a passage for the separated water from the steam-water separator (12) to enter the low-temperature superheater header tank (34), and the electric boiler (31) is connected between the electric heating water inlet pipeline (b) and the electric heating water outlet pipeline (c).
4. A rapid start-up system of a coal-fired boiler coupled with electric heating of a gas turbine drive according to claim 3, characterized in that an electric heating control valve (32) is provided on the electric heating water inlet pipe (b), a switch valve (33) is provided on the main pipe (a) between the inlet of the electric heating water inlet pipe (b) and the outlet of the electric heating water outlet pipe (c), and the electric heating control valve (32) and the switch valve (33) are alternatively opened.
5. The system for rapidly starting the coal-fired boiler by coupling the electric heating of the gas turbine driving according to claim 3, wherein a waste heat exchanger (26) is connected to the main pipeline (a) between the steam-water separator (12) and the inlet of the electric heating water inlet pipeline (b), and a steam inlet of the waste heat exchanger (26) is connected with a steam extraction port of the gas turbine (25) through a steam pipeline (d).
6. The system for rapidly starting the coal-fired boiler by coupling the electric heating of the gas turbine driving according to claim 5, characterized in that a bypass valve (21) and a bypass water pump (22) are sequentially connected on the main pipeline (a) between the steam-water separator (12) and the waste heat exchanger (26), and the bypass valve (21) is closer to the steam-water separator (12) than the bypass water pump (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222915587.1U CN218721413U (en) | 2022-11-02 | 2022-11-02 | Coal-fired boiler quick start-up system of coupling gas turbine drive electric heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222915587.1U CN218721413U (en) | 2022-11-02 | 2022-11-02 | Coal-fired boiler quick start-up system of coupling gas turbine drive electric heating |
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| Publication Number | Publication Date |
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| CN218721413U true CN218721413U (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222915587.1U Active CN218721413U (en) | 2022-11-02 | 2022-11-02 | Coal-fired boiler quick start-up system of coupling gas turbine drive electric heating |
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| CN (1) | CN218721413U (en) |
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- 2022-11-02 CN CN202222915587.1U patent/CN218721413U/en active Active
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