CN216894645U - Ignition pressure stabilizing device of IGCC power station gas turbine, fuel gas system, gas turbine and IGCC power station - Google Patents
Ignition pressure stabilizing device of IGCC power station gas turbine, fuel gas system, gas turbine and IGCC power station Download PDFInfo
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- CN216894645U CN216894645U CN202220788482.1U CN202220788482U CN216894645U CN 216894645 U CN216894645 U CN 216894645U CN 202220788482 U CN202220788482 U CN 202220788482U CN 216894645 U CN216894645 U CN 216894645U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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Abstract
The utility model provides an ignition pressure stabilizing device of a gas turbine of an IGCC power station, a fuel gas system, the gas turbine and the IGCC power station, wherein the ignition pressure stabilizing device comprises a pressure stabilizing pump and a pressure stabilizing tank which are arranged in the fuel gas system, a fuel gas cylinder, the pressure stabilizing pump, an evaporator and the pressure stabilizing tank are sequentially communicated through a communicating pipeline in the fuel gas system, an automatic pressure regulating system for conveying the fuel gas in the pressure stabilizing tank to a combustion chamber of the gas turbine in a constant pressure mode is arranged on the pressure stabilizing tank, and the pressure stabilizing pump is connected into the automatic pressure regulating system in an electric connection mode. The ignition pressure stabilizing device of the gas turbine of the IGCC power station, the fuel gas system, the gas turbine and the IGCC power station solve the problems of low utilization rate of a fuel gas bottle of the gas turbine of the IGCC power station, unstable pressure of fuel gas in winter and low ignition success reliability in the prior art.
Description
Technical Field
The utility model relates to the technical field of energy and power engineering, in particular to an ignition pressure stabilizing device of an IGCC power station gas turbine, a fuel gas system, the gas turbine and the IGCC power station.
Background
The IGCC (integrated gasification combined cycle) technology is that coal powder is combusted in a gasification furnace to prepare crude synthesis gas with medium and low heat value, the crude synthesis gas is changed into clean synthesis gas through a purification device, and the clean synthesis gas enters a gas turbine to do work. Compared with the traditional natural gas, the synthetic gas has the characteristic of low heat value, an IGCC power station needs to be matched with a low heat value gas turbine, the low heat value gas turbine needs to be started under the working condition of fuel oil, and the fuel oil is required to be ignited by utilizing fuel gas to realize the starting due to the fact that the volatility of the fuel oil is low. According to the design specification GB50028-2006 for town gas, a general fuel gas system needs to be provided with a fuel gas cylinder with the total volume less than 1m3, and an evaporator and a pressure regulating device are arranged at the same time.
In the prior art, a fuel gas system of an IGCC power station combustion engine has the following defects:
1) from the economical point of view, when the fuel gas cylinder is in a gas deficiency state, the minimum pressure value of the ignition of the combustion engine cannot be met, and the fuel gas cylinder with the gas deficiency needs to be frequently checked and replaced, so that the utilization rate of the fuel gas cylinder is low, and waste is caused;
2) from the perspective of safety, when the environmental temperature is low, the pressure of the fuel gas bottle is unstable, the minimum pressure value for ignition of the combustion engine cannot be maintained, the fuel gas bottle needs to be watered manually by hot water, and the manual watering behavior has certain potential safety hazards;
3) from the viewpoint of reliability, the success of the ignition start of the internal combustion engine cannot be reliably ensured because the fuel cylinder needs to be frequently replaced or because the fuel cylinder is affected by the ambient temperature.
SUMMERY OF THE UTILITY MODEL
In view of this, the technical problem to be solved by the present invention is: the first aspect is to provide an ignition pressure stabilizing device of an IGCC power station gas turbine, which solves the problems of low utilization rate of a fuel gas cylinder of the IGCC power station gas turbine, unstable pressure of fuel gas in winter and low reliability of successful ignition in the prior art.
In order to solve the technical problem of the first aspect, the utility model provides an ignition pressure stabilizing device of an IGCC power station gas turbine, which comprises a pressure stabilizing pump and a pressure stabilizing tank which are arranged in a fuel gas system, wherein in the fuel gas system, a fuel gas cylinder, the pressure stabilizing pump, an evaporator and the pressure stabilizing tank are sequentially communicated through a communicating pipeline, an automatic pressure regulating system used for conveying fuel gas in the pressure stabilizing tank to a combustion chamber of the gas turbine in a constant pressure mode is arranged on the pressure stabilizing tank, and the pressure stabilizing pump is electrically connected with the automatic pressure regulating system.
Preferably, the automatic pressure regulating system comprises a pressure switch for regulating the pressure of the fuel gas in the pressure stabilizing tank, and the pressure switch is in communication connection with the pressure stabilizing pump.
Preferably, the pressure switch is a digital display pressure switch.
Preferably, on the outlet pipeline of surge tank, automatic pressure regulating system includes self-excitation formula pressure-regulating valve, the surge tank pass through self-excitation formula pressure-regulating valve with the combustion engine combustion chamber switches on.
Preferably, the outlet pipeline is further provided with a first check valve located at the downstream of the self-excitation type pressure regulating valve.
Preferably, be provided with on the surge tank with the outlet pipeline is the diffuse pipeline of parallelly connected setting, automatic pressure regulating system still including set up in diffuse the automatic pressure regulating valve on the pipeline.
Preferably, the pressure stabilizing pump adopts a positive displacement sliding vane pump.
The technical problems to be solved by the utility model are as follows: the second aspect provides a fuel gas system of an IGCC power station gas turbine, and/or the third aspect provides an IGCC power station gas turbine, and/or the fourth aspect provides an IGCC power station, which solves the problems of low utilization rate of fuel gas cylinders of the IGCC power station gas turbine, unstable pressure of fuel gas in winter and low reliability of ignition success in the prior art.
In order to solve the technical problem of the second aspect, the utility model provides a fuel gas system of an IGCC power station combustion engine, which comprises the ignition pressure stabilizing device of the IGCC power station combustion engine according to any one of the embodiments of the first aspect.
In order to solve the technical problem of the third aspect, the utility model provides an IGCC power plant combustion engine, which comprises the ignition pressure stabilizing device of the IGCC power plant combustion engine described in any one of the embodiments of the first aspect.
In order to solve the technical problem of the fourth aspect, the utility model provides an IGCC power plant, which comprises the ignition pressure stabilizing device of the combustion engine of the IGCC power plant according to any one of the embodiments of the first aspect.
Compared with the prior art, the ignition pressure stabilizing device of the gas turbine of the IGCC power station, the fuel gas system, the gas turbine and the IGCC power station have the following beneficial effects:
1) the problems of low utilization rate of a fuel gas cylinder of the gas turbine of the IGCC power station, unstable pressure of fuel gas in winter and low reliability of successful ignition in the prior art are fundamentally solved;
2) the utilization rate of the fuel gas cylinder is improved from economy, and meanwhile, the frequent inspection and replacement of the fuel gas cylinder are reduced;
3) the influence of the environmental temperature is not needed, and the potential safety hazard of watering the fuel gas bottle in cold weather is avoided from the aspect of safety;
4) the success rate of ignition and ignition starting of the low-heat-value gas turbine of the IGCC power station is improved from the reliability, and efficient and reliable operation of the IGCC power station is facilitated.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model, illustrate embodiments of the utility model and together with the description serve to explain the utility model and are not to limit the utility model. In the drawings:
FIG. 1 is a schematic diagram of the installation structure of an ignition pressure stabilizing device of an IGCC power station combustion engine in a fuel gas system of the ignition pressure stabilizing device in embodiment 1 of the utility model;
FIG. 2 is a schematic diagram of the operation of a fuel gas system for an IGCC power plant combustion engine as described in FIG. 1.
Description of reference numerals:
1-a fuel gas bottle, 2-a pressure stabilizing pump, 3-an evaporator, 4-a pressure stabilizing tank, 5-a pressure switch, 6-an automatic pressure regulating valve, 7-a self-excitation pressure regulating valve, 81-a first check valve and 82-a second check valve.
Detailed Description
In order to make the aforementioned objects, technical solutions and advantages of the present invention more comprehensible, the present invention is described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only some of the embodiments constituting the present invention, and are not intended to limit the present invention, and the embodiments and features of the embodiments may be combined with each other without conflict.
Example 1
Referring to fig. 1-2, the utility model provides an ignition pressure stabilizing device of an IGCC power station gas turbine, which comprises a pressure stabilizing pump 2 and a pressure stabilizing tank 4 which are arranged in a fuel gas system, wherein in the fuel gas system, a fuel gas cylinder 1, the pressure stabilizing pump 2, an evaporator 3 and the pressure stabilizing tank 4 are sequentially communicated through a communicating pipeline, an automatic pressure regulating system for conveying fuel gas in the pressure stabilizing tank 4 to a combustion chamber of the gas turbine in a constant pressure manner is arranged on the pressure stabilizing tank 4, and the pressure stabilizing pump 2 is electrically connected to the automatic pressure regulating system.
Specifically, in the utility model, by additionally arranging an ignition pressure stabilizing device in a fuel gas system of a gas turbine of an IGCC power station, even if the current environment temperature is low or even if the fuel gas cylinder 1 is in a proper gas shortage state, the pressure stabilizing pump 2 can automatically suck and pressurize the fuel gas in the fuel gas cylinder 1 under the feedback action of an automatic pressure regulating system, the automatically sucked and pressurized fuel gas then enters an evaporator 3 for evaporation, and the fuel gas is changed from liquid to gas in the evaporator 3 and then enters a pressure stabilizing tank 4.
In the process, the automatic pressure regulating system monitors the fuel gas pressure in the pressure stabilizing tank 4 and regulates the pressure by controlling the automatic start and stop of the pressure stabilizing pump 2, so that the fuel gas pressure in the pressure stabilizing tank 4 is always controlled to be PConstant temperatureTo a set pressure range ofEven if the current environment temperature is low or the fuel gas bottle 1 is in a proper gas shortage state, the automatic pressure regulating system can realize that the fuel gas in the pressure stabilizing tank 4 is conveyed to the combustion chamber of the combustion engine in a constant pressure mode, so that the success of pilot ignition of the low-heat-value gas turbine of the IGCC power station is ensured. Wherein P is also understood herein by those skilled in the artConstant temperatureAs a "P1～P2"pressure setting range of minimum value P1Will be equal to or greater than the minimum pressure value required for the fuel gas during ignition of the combustion engine.
Therefore, in the ignition and ignition process of the low-heat-value gas turbine of the IGCC power station, the ignition pressure stabilizing device does not need to be influenced by the environmental temperature, and the potential safety hazard of watering the fuel gas bottle 1 in cold weather is avoided from the aspect of safety; meanwhile, the frequent inspection and replacement of the fuel gas cylinder 1 are reduced from the economical aspect, and the utilization rate of the fuel gas cylinder 1 is improved; and finally, the success rate of the ignition and ignition starting of the combustion engine is improved from the reliability. The problems of low utilization rate of the fuel gas cylinder of the gas turbine of the IGCC power station, unstable fuel gas pressure in winter and low ignition success reliability in the prior art are solved fundamentally.
Preferably, the automatic pressure regulating system comprises a pressure switch 5 for regulating the pressure of the fuel gas in the pressure stabilizing tank 4, and the pressure switch 5 is in communication connection with the pressure stabilizing pump 2.
Specifically, the pressure switch 5 automatically exhibits two states of on and off according to the fuel gas pressure value P monitored in the surge tank 4, so that the surge pump 2 is automatically started and stopped, and the fuel gas pressure in the surge tank 4 is always controlled to be PConstant temperatureThe set pressure range of (1). Wherein P isConstant temperatureFor example, the pressure switch 5 can be set to 0.6 to 1.2MPa or any interval value of 0.6 to 1.2MPa, for example, 0.6 to 0.9MPa, so that when P is less than or equal to 0.6MPa, the pressure stabilizing pump 2 is started automatically; otherwise, when P is more than or equal to 0.9MPa, the pressure switch 5 is switched off, and the pressure stabilizing pump 2 stops running automatically.
As one preferred example of the present invention, the pressure switch 5 is a digital display pressure switch, so that the pressure switch 5 integrates pressure measurement, display and control, which greatly facilitates people to observe the fuel gas pressure value P monitored in the surge tank 4.
Preferably, on an outlet pipeline of the surge tank 4, the automatic pressure regulating system comprises a self-excitation type pressure regulating valve 7, and the surge tank 4 is communicated with the combustion chamber of the combustion engine through the self-excitation type pressure regulating valve 7.
Particularly, during the ignition process of the low-heat-value gas turbine of the IGCC power station, the self-excitation pressure regulating valve 7 can conveniently regulate the fuel gas in the pressure stabilizing tank 4 to be PConstant temperatureIs conveyed to a combustion chamber of the combustion engine in a constant pressure mode; after ignition is finished, the self-excitation pressure regulating valve 7 is disconnected, and the low-heat value gas turbine can be pushed to do work only by the working condition of fuel oil or even clean synthetic gas.
As one preferred example of the present invention, the surge tank 4 has a vertical structure, and the outlet pipe is opened along a lower end of the surge tank 4.
Preferably, the outlet pipeline is further provided with a first check valve 81 located downstream of the self-excited pressure regulating valve 7.
Specifically, the first check valve 81 prevents air from back mixing into the fuel gas, thereby ensuring the purity of the fuel gas in the outlet line upstream of the first check valve 81 and in the surge tank 4.
Preferably, be provided with on the surge tank 4 with the outlet pipeline is the diffuse pipeline of parallelly connected setting, automatic pressure regulating system still including set up in automatic pressure regulating valve 6 on the diffuse pipeline.
Specifically, when P isConstant temperatureWhen the pressure setting range of (1) is 0.6-0.9 MPa, even if P is more than or equal to 0.9MPa, the pressure switch 5 is switched off, and the pressure stabilizing pump 2 stops operating automatically, but in reality, the pressure value P of the fuel gas in the pressure stabilizing tank 4 at the later stage is probably far more than 0.9MPa, even 1.0MPa, 1.1MPa and 1.2MPa because of various objective factor interferences, such as hysteresis influence from the working procedure of the evaporator 3, or sudden change of the ambient temperature, and for example, when P is more than or equal to P3At the critical pressure value, the surge tank 4 may have a certain overpressure hidden trouble, and at this time, the automatic pressure regulating valve6, the overpressure fuel gas in the surge tank 4 will be automatically diffused by the automatic pressure regulating valve 6 to prevent overpressure of the surge tank 4, wherein P3For example, it can be set to 1.2 MPa.
As one preferable example of the present invention, the bleeding pipeline is opened along the upper end near the surge tank 4.
As another preferable example of the present invention, a second check valve 82 is further provided on the purge line downstream of the automatic pressure regulating valve 6.
Preferably, the pressure stabilizing pump 2 adopts a positive displacement sliding vane pump.
Specifically, when the pressure stabilizing pump 2 adopts a positive displacement sliding vane pump, the ignition pressure stabilizing device has better comprehensive performance, such as better control on the operation efficiency, energy conservation, operation reliability and maintenance cost.
Example 2
Referring to fig. 1-2, the present invention also provides a fuel gas system for an IGCC power plant combustion engine, having the ignition pressure stabilizer for the IGCC power plant combustion engine described in embodiment 1.
The utility model also provides an IGCC power station combustion engine which is provided with the ignition pressure stabilizing device of the IGCC power station combustion engine in the embodiment 1.
The utility model also provides an IGCC power station which is provided with the ignition pressure stabilizing device of the combustion engine of the IGCC power station in the embodiment 1.
Specifically, it can be understood by those skilled in the art that, when the fuel gas system and/or the combustion engine and/or the IGCC power station provided in embodiment 2 has the ignition pressure stabilizing device of the combustion engine of the IGCC power station described in embodiment 1, the solution of the corresponding technical problem and the achievement of the technical effect thereof can be referred to the description of the ignition pressure stabilizing device of the combustion engine of the IGCC power station in embodiment 1, and are not described in detail herein.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. The ignition pressure stabilizing device of the gas turbine of the IGCC power station is characterized by comprising a pressure stabilizing pump (2) and a pressure stabilizing tank (4) which are arranged in a fuel gas system, wherein in the fuel gas system, a fuel gas cylinder (1), the pressure stabilizing pump (2), an evaporator (3) and the pressure stabilizing tank (4) are sequentially communicated through a communicating pipeline, an automatic pressure regulating system which is used for conveying the fuel gas in the pressure stabilizing tank (4) to a combustion chamber of the gas turbine in a constant pressure mode is arranged on the pressure stabilizing tank (4), and the pressure stabilizing pump (2) is connected into the automatic pressure regulating system in an electric connection mode.
2. An ignition pressure stabilizing device of an IGCC power plant combustion engine according to claim 1, characterized in that the automatic pressure regulating system comprises a pressure switch (5) for regulating the pressure of the fuel gas in the pressure stabilizing tank (4), and the pressure switch (5) is connected with the pressure stabilizing pump (2) in communication.
3. An ignition pressure stabilizing device of an IGCC power plant combustion engine according to claim 2, characterized in that the pressure switch (5) is a digital display pressure switch.
4. An ignition pressure stabilizing device of an IGCC power plant combustion engine according to claim 1, characterized in that, on the outlet pipeline of the pressure stabilizing tank (4), the automatic pressure regulating system comprises a self-excitation type pressure regulating valve (7), and the pressure stabilizing tank (4) is communicated with the combustion engine combustion chamber through the self-excitation type pressure regulating valve (7).
5. The ignition and pressure stabilizing apparatus of an IGCC power plant combustion engine as claimed in claim 4, wherein said outlet conduit is further provided with a first check valve (81) located downstream of said self-excited pressure regulating valve (7).
6. The ignition pressure stabilizing device of an IGCC power station combustion engine as claimed in claim 4, wherein the pressure stabilizing tank (4) is provided with a bleeding pipeline which is arranged in parallel with the outlet pipeline, and the automatic pressure regulating system further comprises an automatic pressure regulating valve (6) which is arranged on the bleeding pipeline.
7. The ignition pressure stabilizing device of the IGCC power plant combustion engine as claimed in any one of claims 1-6, characterized in that the pressure stabilizing pump (2) adopts a positive displacement sliding vane pump.
8. A fuel gas system of a combustion engine of an IGCC power station, characterized by comprising the ignition pressure stabilizing device of the combustion engine of the IGCC power station as claimed in any one of claims 1-7.
9. An IGCC power plant combustion engine, characterized in that, the ignition pressure stabilizing device of the IGCC power plant combustion engine is included in any one of the claims 1-7.
10. An IGCC plant, characterized in that it comprises an ignition pressure stabilizing device for an IGCC plant combustion engine as claimed in any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220788482.1U CN216894645U (en) | 2022-04-06 | 2022-04-06 | Ignition pressure stabilizing device of IGCC power station gas turbine, fuel gas system, gas turbine and IGCC power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220788482.1U CN216894645U (en) | 2022-04-06 | 2022-04-06 | Ignition pressure stabilizing device of IGCC power station gas turbine, fuel gas system, gas turbine and IGCC power station |
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| Publication Number | Publication Date |
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| CN216894645U true CN216894645U (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220788482.1U Active CN216894645U (en) | 2022-04-06 | 2022-04-06 | Ignition pressure stabilizing device of IGCC power station gas turbine, fuel gas system, gas turbine and IGCC power station |
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| CN (1) | CN216894645U (en) |
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- 2022-04-06 CN CN202220788482.1U patent/CN216894645U/en active Active
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