CN110887059A - Gas fuel supply system applied to DLE type combustion cylinder - Google Patents
Gas fuel supply system applied to DLE type combustion cylinder Download PDFInfo
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- CN110887059A CN110887059A CN201911041748.5A CN201911041748A CN110887059A CN 110887059 A CN110887059 A CN 110887059A CN 201911041748 A CN201911041748 A CN 201911041748A CN 110887059 A CN110887059 A CN 110887059A
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- valve
- gas
- pneumatic
- duty
- fuel
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- 239000000446 fuel Substances 0.000 title claims abstract description 66
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 35
- 239000007789 gas Substances 0.000 claims abstract description 47
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003345 natural gas Substances 0.000 claims abstract description 5
- 230000007246 mechanism Effects 0.000 claims description 3
- 230000000740 bleeding effect Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a gas fuel supply system applied to a DLE type combustion cylinder, which relates to the field of gas turbines and comprises a gas filter, two pneumatic shutoff valves, a pneumatic blow-off valve, a main fuel valve, an on-duty fuel valve and a connecting pipeline; the pneumatic shutoff valve and the pneumatic blow-off valve are driven by an external air source, so that a secondary shutoff system consisting of two groups of pneumatic shutoff valves is formed, and the pneumatic shutoff valve is arranged between the two groups of pneumatic shutoff valves; the gas quantity in the natural gas main pipeline can be adjusted through the main fuel valve, the gas quantity in the on-duty pipeline can be adjusted through the on-duty fuel valve, and the on-duty fuel valve can also be used as a control device of a standby gas source in the DLE type combustion chamber. The invention can effectively improve the problem of easy flameout in the working state of the DLE combustion cylinder, realizes low emission of the gas turbine, can fully meet the requirements of different working conditions such as starting, full load, stopping and the like of the gas turbine, has simple system design and high reliability, and can be widely popularized and applied in the field of fuel supply of the gas turbine.
Description
Technical Field
The invention relates to the technical field of gas turbines, in particular to a gas fuel supply system applied to a DLE type combustion cylinder.
Background
The gas turbine is an important and core power plant, and the emission performance of the gas turbine is always an important index for measuring the performance of the gas turbine. DLE (Dry Low emission) combustion cylinders are mostly adopted in the industry, and low emission is realized in a premixed combustion mode. The most serious problem of the premixed combustion is easy flameout, so that the reliability of the operation of the combustion engine is greatly reduced. Therefore, the problem that premixed combustion is easy to extinguish is solved, and a matched fuel supply system is designed.
For example, patent No. JP2012-41882A discloses a burner fuel supply system and a fuel supply method thereof, which avoid unstable flame combustion caused by single fuel supply by matching a plurality of fuel supply cavities, realize sufficient fuel mixing and combustion, and effectively improve the combustion efficiency of the burner. However, the burner fuel supply system cannot effectively regulate the throughput of air and fuel, and there is a risk of over-burning or flameout in the combustion chamber of the burner.
Disclosure of Invention
The technical problems solved by the invention are as follows: the gas fuel supply system suitable for the DLE type combustion cylinder is provided, the problem that the gas turbine is easy to extinguish is solved, and stable operation of the gas turbine is better guaranteed.
In order to solve the problems, the invention adopts the following technical scheme:
the gas fuel supply system applied to the DLE type combustion cylinder comprises a gas filter, a pneumatic shutoff valve, a pneumatic blow-off valve, a pneumatic shutoff valve, a main fuel valve, an on-duty fuel valve and a connecting pipeline. The pneumatic shutoff valve and the pneumatic blow-off valve are driven by an external air source, the system is a two-stage shutoff system consisting of two groups of pneumatic shutoff valves, and the blow-off valve is arranged between the two-stage shutoff valves, so that the reliability and the safety are high. The main fuel valve is positioned on the natural gas main pipeline, the on-duty fuel valve is positioned on the on-duty pipeline, the main fuel valve and the on-duty valve respectively adjust the air inflow of the natural gas main pipeline and the air inflow of the on-duty pipeline, and the on-duty valve is used as an adjusting valve of a standby air source in the DLE combustion chamber, so that the fuel supply is stable and can be flexibly adjusted.
In a further improvement, the gas fuel supply system, the shutoff valve and the blow-off valve all adopt pneumatic actuating mechanisms, and the valve can be stably and rapidly switched on and off.
In a further improvement, the gas fuel supply system adopts two gas supply paths, namely a main fuel line controlled by a main fuel valve and an on-duty line controlled by an on-duty fuel valve, which are respectively connected to two groups of nozzles in the combustion cylinder, and the two groups of nozzles are respectively sprayed out for combustion by different nozzles. The flame supplied by the on-duty pipeline can be used as a standby flame after the flame supplied by the main fuel is extinguished, so that the combustion stability of the gas turbine is improved.
The invention has the beneficial effects that: the stability and the security of gas turbine system have been strengthened through the second grade break-make system that sets up, have increased the stability of system simultaneously through the independent design of main gas pipeline and gas pipeline on duty and control flap for the fuel supply lasts stably, has avoided whole system accident to flame out.
Drawings
FIG. 1 is a schematic diagram of the system architecture of the present invention;
the labels in the figure are: 1-filter, 2-pneumatic shut-off valve, 3-pneumatic blow-off valve, 5-main fuel valve and 6-duty fuel valve.
Detailed Description
The invention will be explained and explained in more detail below with reference to the figures and the embodiments.
Example 1: a gas fuel supply system for a DLE type combustor can, characterized by: the system comprises a gas filter 1, a pneumatic shutoff valve 2, a pneumatic blow-off valve 3, a pneumatic shutoff valve 4, a main fuel valve 5, an on-duty fuel valve 6 and a connecting pipeline. The pneumatic shutoff valve 2 and the pneumatic blow-off valve 3 are driven by an external air source, the system is a two-stage shutoff system consisting of two groups of pneumatic shutoff valves 2, and the blow-off valve 3 is arranged between the two-stage shutoff valves. The main fuel gas supply pipeline controlled by the main fuel valve 5 is used for adjusting the gas quantity of the natural gas main pipeline, and the on-duty fuel gas supply pipeline controlled by the on-duty fuel valve 6 is used for adjusting the gas quantity of the on-duty pipeline and can be used as a standby gas source in the DLE combustion chamber. In the gas fuel supply system, the shutoff valve 2 and the blow-off valve 3 adopt pneumatic actuating mechanisms, so that the on-off of the valves can be stably and rapidly realized.
The gas fuel supply system adopts two paths of gas supply, namely a main fuel line controlled by a main fuel valve 5 and an on-duty line controlled by an on-duty fuel valve 6, the two groups of independent nozzles are connected to the combustion cylinder, main fuel flames and on-duty flames are respectively sprayed out by different nozzles, and the on-duty flames can be used as standby flames after the main fuel flames are extinguished, so that the stability of the combustion process is improved.
The starting process of the combustion turbine comprises the following steps: when the combustion turbine is started up to be supplied with gas fuel, the instrument gas is turned on in advance, the pneumatic shutoff valve 2 is opened, and the pneumatic blow-off valve 3 is closed. When all the systems display normal, the pneumatic shutoff valve 4 is opened. At this time, the gas enters the pipeline through the filter, respectively enters the duty line after passing through the two-stage pneumatic shutoff valves 2, the flow rate of the gas fuel is controlled by the duty fuel valve 6, and then the gas sprayed out of the duty line nozzle is ignited and combusted. After the flame is stably burnt, the main fuel valve 5 is started, at the moment, the fuel is divided into two paths to be sprayed into the combustion cylinder, the low emission of tail gas is realized through the premixed combustion of the main fuel, and finally the fuel on duty is gradually diffused and combusted to form stable flame in the combustion chamber.
When the combustion turbine is shut down: firstly, the instrument gas of the pneumatic shutoff valve 2 and the pneumatic bleeding valve 3 is cut off, the former is in a normally closed state, the latter is in a normally open state, and then the pneumatic shutoff valve 4 is cut off, the main fuel valve 5 and the duty fuel valve 6 are closed in sequence, so that the residual gas in the pipeline is safely and stably discharged to a safe area from a bleeding port. Finally, the gas supply cutoff operation when the combustion engine is stopped is realized, and the combustion of the combustion chamber of the gas turbine is stopped.
While specific embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and all embodiments are not necessarily exhaustive. It will be appreciated by those skilled in the art that various changes, modifications and variations can be made without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (3)
1. A gas fuel supply system for a DLE type combustor can, characterized by: including gas filter (1), pneumatic shut-off valve (2), pneumatic valve (3), main fuel valve (5) of diffusing, fuel valve (6) and connecting line on duty, wherein pneumatic shut-off valve (2), pneumatic valve (3) of diffusing are by external air supply action, just the system is the second grade system of shutting off of constituteing by two sets of pneumatic shut-off valves (2), is equipped with pneumatic valve (3) of diffusing between the two-stage system of break-make, main fuel valve (5) are located the natural gas main line, and fuel valve (6) on duty are located the regulation line on duty, and just as the adjusting device of the reserve air supply in the DLE combustion chamber.
2. A gaseous fuel supply system according to claim 1, wherein: the shutoff valve (2) and the blow-off valve (3) both adopt pneumatic actuating mechanisms.
3. A gaseous fuel supply system according to claim 1, wherein: the structure form of two-way air supply is adopted, namely a main fuel circuit controlled by a main fuel valve (5) and an on-duty circuit controlled by an on-duty fuel valve (6) are connected to two groups of nozzles in the combustion cylinder finally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911041748.5A CN110887059A (en) | 2019-10-30 | 2019-10-30 | Gas fuel supply system applied to DLE type combustion cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911041748.5A CN110887059A (en) | 2019-10-30 | 2019-10-30 | Gas fuel supply system applied to DLE type combustion cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110887059A true CN110887059A (en) | 2020-03-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911041748.5A Pending CN110887059A (en) | 2019-10-30 | 2019-10-30 | Gas fuel supply system applied to DLE type combustion cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110887059A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594065A (en) * | 2020-12-07 | 2021-04-02 | 中国航发沈阳发动机研究所 | Gas fuel conditioning system for gas turbine engine and method of designing same |
| CN114704387A (en) * | 2022-05-10 | 2022-07-05 | 南京国电南自维美德自动化有限公司 | Fuel control method for gas turbine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH698408A2 (en) * | 2008-01-31 | 2009-07-31 | Gen Electric | Combined cycle power plant with Zwischenüberhitzungsgas- and Abgasregeneratorsystem. |
| CH709637A2 (en) * | 2014-05-28 | 2015-11-30 | Gen Electric | Systems and methods for variation of injectors for coherence reduction in a combustion system having first and second combustor of a gas turbine. |
| CN207647623U (en) * | 2017-11-16 | 2018-07-24 | 大连派思燃气系统股份有限公司 | Small size gas turbine gaseous fuel module |
| CN211316244U (en) * | 2019-10-30 | 2020-08-21 | 大连欧谱纳透平动力科技有限公司 | Gas fuel supply system applied to DLE type combustion cylinder |
-
2019
- 2019-10-30 CN CN201911041748.5A patent/CN110887059A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH698408A2 (en) * | 2008-01-31 | 2009-07-31 | Gen Electric | Combined cycle power plant with Zwischenüberhitzungsgas- and Abgasregeneratorsystem. |
| CH709637A2 (en) * | 2014-05-28 | 2015-11-30 | Gen Electric | Systems and methods for variation of injectors for coherence reduction in a combustion system having first and second combustor of a gas turbine. |
| CN207647623U (en) * | 2017-11-16 | 2018-07-24 | 大连派思燃气系统股份有限公司 | Small size gas turbine gaseous fuel module |
| CN211316244U (en) * | 2019-10-30 | 2020-08-21 | 大连欧谱纳透平动力科技有限公司 | Gas fuel supply system applied to DLE type combustion cylinder |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594065A (en) * | 2020-12-07 | 2021-04-02 | 中国航发沈阳发动机研究所 | Gas fuel conditioning system for gas turbine engine and method of designing same |
| CN114704387A (en) * | 2022-05-10 | 2022-07-05 | 南京国电南自维美德自动化有限公司 | Fuel control method for gas turbine |
| CN114704387B (en) * | 2022-05-10 | 2023-04-25 | 南京国电南自维美德自动化有限公司 | Fuel control method for gas turbine |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 116610 No. 73, Zhenpeng industrial city, Dalian Economic and Technological Development Zone, Liaoning Province Applicant after: Dalian oppner Turbine Power Technology Co.,Ltd. Address before: 116610 No. 73, Zhenpeng industrial city, Dalian Economic and Technological Development Zone, Liaoning Province Applicant before: DALIAN ENERGAS TURBINE POWER TECHNOLOGY Co.,Ltd. |
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| CB02 | Change of applicant information | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200317 |
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| WD01 | Invention patent application deemed withdrawn after publication |