CN110469408B - Digital gas system - Google Patents
Digital gas system Download PDFInfo
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- CN110469408B CN110469408B CN201910817843.3A CN201910817843A CN110469408B CN 110469408 B CN110469408 B CN 110469408B CN 201910817843 A CN201910817843 A CN 201910817843A CN 110469408 B CN110469408 B CN 110469408B
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- valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/26—Starting; Ignition
- F02C7/264—Ignition
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
A digital gas system comprises a working nozzle connected with a peripheral fuel system through a main gas path, wherein a bypass is led out from the main gas path and is used as an ignition gas path, and the ignition gas path is connected with an ignition nozzle; the main air passage is communicated with low-pressure instrument air and is connected with a gas emptying pipeline, and a gas emptying valve is arranged on the gas emptying pipeline; low pressure instrument wind draw forth four branch roads altogether, be provided with check valve, atmospheric valve and quick cut-off valve on four branch roads, the gas evacuation pipeline is drawn forth two branch roads and is linked to each other with main gas circuit, first, two quick cut-off valves are installed on the main road, third, four quick cut-off valve are located two branch roads of gas evacuation pipeline respectively, the ignition gas is equipped with ignition solenoid valve on the road, main gas circuit install the natural gas governing valve after the intercommunication point with the ignition gas circuit. The fuel supply and flow regulation of the gas system are stable, and the fuel supply of normal work and shutdown of the gas turbine can be effectively guaranteed.
Description
Technical Field
The invention belongs to the field of fuel digital control type system design, and particularly relates to a digital gas system.
Background
The gas turbine adopts natural gas as fuel, requires reasonable configuration of an applicable control system, adopts an electronic data control mode, and has the functions of regulation, monitoring, protection, information acquisition, processing, recording, storage, display and communication.
The control system mainly comprises an electronic controller, control software, a sensor, a signaler, a valve, an actuator, an electric mechanism, an electric box (cabinet), a main control console and a machine-side control panel. The control scheme mainly comprises control logic, fault alarm and fault processing strategies. The main valve equipment should be able to meet the requirements of the unit from start ignition to full load of the grid-connected to the whole process of natural gas fuel supply, and ensure the normal operation of the gas turbine and the fuel supply and control of the shutdown.
The model selection design of key components such as a sensor, a regulating valve and the like in the fuel system needs to strictly meet the control precision requirement and the response time requirement of a control system, and the fuel metering device has the advantages of accurate metering, stable fuel supply and regulating flow, safety, reliability, small maintenance workload and long service life. The selected parts or components should have good interchangeability, and important parts such as valves, sensors and the like in the system are imported products. Auxiliary equipment attached to the fuel system is reasonable in design, small in size, light in weight, high in integration level and reliability, supplied components have good operation performance when power plants of the same type are successfully used, and the requirement of long-time continuous operation of the system can be met.
Disclosure of Invention
The present invention is directed to solve the above problems in the prior art, and an object of the present invention is to provide a digital gas combustion system, which can meet design requirements, and is safe and reliable in operation, and is convenient for supplying and adjusting fuel during the operation of a gas turbine.
In order to achieve the purpose, the invention adopts the technical scheme that: the ignition device comprises a working nozzle connected with a peripheral fuel system through a main gas path, wherein a bypass is led out from the main gas path to serve as an ignition gas path, and the ignition gas path is connected with an ignition nozzle;
the main gas path is introduced into low-pressure instrument wind and connected with a gas emptying pipeline, and a gas emptying valve is arranged on the gas emptying pipeline; the low-pressure instrument wind leads out four branches, the first branch is connected with a first quick cut-off valve arranged on the main path through a first check valve and a first emptying valve, the second branch is connected with a second quick cut-off valve arranged on the main path through a second check valve and a second emptying valve, the first quick cut-off valve is positioned in front of a communication point of the main gas path and the ignition gas path, and the second quick cut-off valve is positioned behind the communication point of the main gas path and the ignition gas path; the third branch is connected with a third quick cut-off valve through a third check valve and a third emptying valve, the fourth branch is connected with a fourth quick cut-off valve through a fourth check valve and a fourth emptying valve, two branches are led out from the gas emptying pipeline and are connected with the main gas path, the third quick cut-off valve and the fourth quick cut-off valve are respectively positioned on the two branches of the gas emptying pipeline, the communication point of the branch where the third quick cut-off valve is positioned and the main gas path is positioned in front of the communication point of the main gas path and the ignition gas path, and the communication point of the branch where the fourth quick cut-off valve is positioned and the main gas path is positioned behind the communication point of the main gas path and the ignition gas path;
an ignition electromagnetic valve is arranged on the ignition gas path, and a natural gas regulating valve is arranged behind the communicating point of the main gas path and the ignition gas path. An ignition gas path behind the ignition solenoid valve is divided into two branches, and the two branches are respectively connected with the first ignition nozzle and the second ignition nozzle.
The main gas path is provided with an oil filter which is arranged in front of a communication point of the main gas path and the ignition gas path.
The gas evacuation pipeline set up the branch road of third quick cut-off valve and the intercommunication point of main gas circuit lie in between the intercommunication point and the first quick cut-off valve of main gas circuit and ignition gas circuit, oil is strained and is arranged before first quick cut-off valve. The main air path is provided with a main air path temperature sensor which is arranged in front of the oil filter. The gas emptying pipeline is provided with a branch of a fourth quick cut-off valve, and a communication point of the branch and the main gas circuit is positioned between the natural gas regulating valve and the working nozzle. And the second quick cut-off valve is positioned between the communication point of the main gas path and the ignition gas path and the natural gas regulating valve. A first main air path pressure sensor and a second main air path pressure sensor are arranged on the main air path; the first main gas circuit pressure sensor is arranged between a communication point of a branch of the third quick cut-off valve arranged on the gas emptying pipeline and the main gas circuit and the first quick cut-off valve, and the second main gas circuit pressure sensor is arranged between a communication point of a branch of the fourth quick cut-off valve arranged on the gas emptying pipeline and the main gas circuit and the natural gas regulating valve.
The ignition gas path is sequentially provided with a first-stage pressure reducing valve and a second-stage throttle valve, and the second-stage throttle valve is positioned in front of the ignition electromagnetic valve.
And an ignition gas path pressure sensor is arranged between the secondary throttle valve and the ignition solenoid valve in the ignition gas path.
Compared with the prior art, the invention has the following beneficial effects: the main gas circuit is connected with low-pressure instrument wind and a gas evacuation pipeline, the emptying valve, the quick cut-off valve and the check valve are communicated to be used as a working group, the low-pressure instrument wind enters the check valve and reaches the upper cavity of the quick cut-off valve through the emptying valve, after the fuel is quickly cut off, the pressure increase of the fuel is greater than the upper cavity pressure of the quick cut-off valve, and the fuel in the pipeline is discharged into the atmosphere from the quick cut-off valve through the emptying valve. The low-pressure instrument wind is used for controlling air pressure to control whether the quick cut-off valve is opened or not, four branches are led out from the low-pressure instrument wind, the front and the back of a communication point of a main gas path and an ignition gas path are respectively controlled, the flow of gas is adjusted through a natural gas adjusting valve, the adjusted gas is combusted from a working nozzle to a combustion chamber, when an engine is stopped, the first quick cut-off valve and the second quick cut-off valve are closed, the gas is discharged into the atmosphere from a pipeline, the third quick cut-off valve and the fourth quick cut-off valve are opened, and residual gas is discharged from the pipeline. The fuel supply and flow regulation of the gas system are stable, the gas system works safely and reliably, the maintenance workload is small, the service life is long, the parts have good interchangeability, and the digital control is adopted, so that the fuel supply of the normal work and the stop of the gas turbine can be effectively guaranteed.
Furthermore, the main gas path is provided with a main gas path temperature sensor, the main gas path pressure sensors are arranged at different positions to sense the gas temperature and the gas pressure of the working pipeline, and the ignition gas path is provided with an ignition gas path pressure sensor to prevent abnormity.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the digital gas combustion system of the present invention;
in the drawings: 1-low pressure instrument wind; 2-peripheral fuel system; 3-a gas evacuation valve; 4-oil filtration; 5-a first quick cut-off valve; 6-a second quick cut-off valve; 7-natural gas regulating valve; 8-a working nozzle; 9-a primary pressure reducing valve; 10-a two-stage throttle valve; 11-ignition solenoid valve; 12-a first ignition nozzle; 13-a second ignition nozzle; 14-a first vent valve; 15-a second vent valve; 16-a third vent valve; 17-a fourth vent valve; 18-a first check valve; 19-a second check valve; 20-pressure sensor line valves; 21-a third check valve; 22-a fourth check valve; 23-a third quick shut-off valve; 24-a fourth quick shut-off valve; a-a main gas path temperature sensor; b-a first main gas line pressure sensor; c-a second main gas line pressure sensor; d-ignition gas path pressure sensor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the digital gas system of the present invention includes a working nozzle 8 connected to a peripheral fuel system 2 through a main gas path, a bypass is led out from the main gas path as an ignition gas path, the main gas path is led into a low pressure instrument wind 1 and connected to a gas evacuation line, and a gas evacuation valve 3 is disposed on the gas evacuation line. Four branches are led out from the low-pressure instrument wind 1, the first branch is connected with a first quick cut-off valve 5 installed on a main path through a first check valve 18 and a first emptying valve 14, the second branch is connected with a second quick cut-off valve 6 installed on the main path through a second check valve 19 and a second emptying valve 15, the first quick cut-off valve 5 is located in front of a communication point of the main gas path and an ignition gas path, and the second quick cut-off valve 6 is located behind the communication point of the main gas path and the ignition gas path. The third branch is connected with a third quick cut-off valve 23 through a third check valve 21 and a third emptying valve 16, the fourth branch is connected with a fourth quick cut-off valve 24 through a fourth check valve 22 and a fourth emptying valve 17, the gas emptying pipeline leads out two branches to be connected with the main gas circuit, the third quick cut-off valve 23 and the fourth quick cut-off valve 24 are respectively positioned on the two branches of the gas emptying pipeline, the communication point of the branch where the third quick cut-off valve 23 is positioned and the main gas circuit is positioned before the communication point of the main gas circuit and the ignition gas circuit, and the communication point of the branch where the fourth quick cut-off valve 24 is positioned and the main gas circuit is positioned after the communication point of the main gas circuit and the ignition gas circuit. An ignition electromagnetic valve 11 is arranged on the ignition gas path, and a natural gas regulating valve 7 is arranged behind the communication point of the main gas path and the ignition gas path. An ignition gas path behind the ignition solenoid valve 11 is divided into two branches, and the two branches are respectively connected with a first ignition nozzle 12 and a second ignition nozzle 13.
An oil filter 4 is arranged on the main gas path, and the oil filter 4 is arranged in front of a communication point of the main gas path and the ignition gas path. The branch of the gas emptying pipeline provided with the third quick cut-off valve 23 and the communication point of the main gas circuit are positioned between the communication point of the main gas circuit and the ignition gas circuit and the first quick cut-off valve 5, and the oil filter 4 is arranged in front of the first quick cut-off valve 5. The main gas path is provided with a main gas path temperature sensor a, which is arranged in front of the oil filter 4. The communication point of the branch of the gas emptying pipeline provided with the fourth quick cut-off valve 24 and the main gas circuit is positioned between the natural gas regulating valve 7 and the working nozzle 8. And the second quick cut-off valve 6 is positioned between the communication point of the main gas path and the ignition gas path and the natural gas regulating valve 7. Be equipped with first main gas circuit pressure sensor b and the main gas circuit pressure sensor c of second on the main gas circuit, first main gas circuit pressure sensor b arranges between the branch road that gas evacuation pipeline set up third quick shut-off valve 23 and the intercommunication point and the first quick shut-off valve 5 of main gas circuit, and second main gas circuit pressure sensor c sets up between the branch road that gas evacuation pipeline set up fourth quick shut-off valve 24 and the intercommunication point and the natural gas control valve 7 of main gas circuit. A primary pressure reducing valve 9 and a secondary throttle valve 10 are sequentially arranged on the ignition gas path, and the secondary throttle valve 10 is positioned in front of an ignition electromagnetic valve 11. An ignition gas path pressure sensor d is arranged in the ignition gas path between the secondary throttle valve 10 and the ignition solenoid valve 11.
The working principle and the working process of the invention are as follows:
when the engine begins work, the gas gets into oil from peripheral fuel system 2 and strains 4, first quick cut-off valve 5 is opened, the gas is through first quick cut-off valve 5, ignition solenoid valve 11 opens, one-level relief valve 9 and second grade choke valve 10 two-stage adjustment gas flow get into combustion chamber and air mixing, one-level relief valve 9 carries out the coarse pressure regulating, then carry out the fine pressure regulating through second grade choke valve 10, first ignition nozzle 12 and second ignition nozzle 13 ignite, after the ignition is successful, second quick cut-off valve 6 is opened, the gas carries out the gas flow adjustment through natural gas governing valve 7, the gas after the adjustment is burnt by working nozzle 8 to the combustion chamber. When the engine is stopped, the first quick cut-off valve 5 and the second quick cut-off valve 6 are closed, gas is discharged to the atmosphere from the pipeline, the third quick cut-off valve 23 and the fourth quick cut-off valve 24 are opened, and residual gas is discharged from the pipeline.
For the sake of safety, the invention is provided with four quick cut-off valves which work simultaneously, the quick cut-off valves are three-way pipelines, one of the quick cut-off valves is connected with a working gas path, the emptying valve, the quick cut-off valve and the check valve are communicated into a working group, and the other end of the quick cut-off valve is connected with low-pressure instrument wind to be used as control air pressure to control whether the quick cut-off valve is opened or not. Temperature and pressure sensors are arranged at different positions of the main gas path and the ignition gas path, fuel parameters at corresponding positions are collected through the sensors, and each valve is adjusted to realize digital control.
The above description is only a preferred embodiment of the present invention and should not be taken as limiting the technical solution of the present invention in any way, and it should be understood by those skilled in the art that the present invention can be modified and replaced by other simple modifications and replacements without departing from the spirit and principle of the present invention, and the modifications and replacements also fall within the protection scope defined by the claims.
Claims (10)
1. A digital gas system, its characterized in that: the ignition device comprises a working nozzle (8) connected with a peripheral fuel system (2) through a main gas path, wherein a bypass is led out from the main gas path to serve as an ignition gas path, and the ignition gas path is connected with the ignition nozzle;
the main gas path is introduced into low-pressure instrument wind (1) and is connected with a gas evacuation pipeline, and a gas evacuation valve (3) is arranged on the gas evacuation pipeline; the low-pressure instrument wind (1) leads out four branches in total, the first branch is connected with a first quick cut-off valve (5) arranged on a main path through a first check valve (18) and a first emptying valve (14), the second branch is connected with a second quick cut-off valve (6) arranged on the main path through a second check valve (19) and a second emptying valve (15), the first quick cut-off valve (5) is positioned in front of a communication point of a main gas path and an ignition gas path, and the second quick cut-off valve (6) is positioned behind the communication point of the main gas path and the ignition gas path; the third branch is connected with a third quick cut-off valve (23) through a third check valve (21) and a third emptying valve (16), the fourth branch is connected with a fourth quick cut-off valve (24) through a fourth check valve (22) and a fourth emptying valve (17), two branches are led out from the gas emptying pipeline and are connected with the main gas path, the third quick cut-off valve (23) and the fourth quick cut-off valve (24) are respectively positioned on the two branches of the gas emptying pipeline, the communication point of the branch where the third quick cut-off valve (23) is positioned and the main gas path is positioned in front of the communication point of the main gas path and the ignition gas path, and the communication point of the branch where the fourth quick cut-off valve (24) is positioned and the main gas path is positioned and behind the communication point of the main gas path and the ignition gas path; an ignition electromagnetic valve (11) is arranged on the ignition gas path, and a natural gas regulating valve (7) is arranged behind the communicating point of the main gas path and the ignition gas path.
2. A digital gas fired system according to claim 1 wherein: an ignition gas path behind the ignition solenoid valve (11) is divided into two branches, and the two branches are respectively connected with a first ignition nozzle (12) and a second ignition nozzle (13).
3. A digital gas fired system according to claim 1 wherein: the ignition device is characterized in that an oil filter (4) is arranged on the main gas path, and the oil filter (4) is arranged in front of a communication point of the main gas path and the ignition gas path.
4. A digital gas fired system according to claim 3 wherein: the gas emptying pipeline is provided with a branch of a third quick cut-off valve (23) and a communication point of a main gas circuit, the branch is positioned between the communication point of the main gas circuit and an ignition gas circuit and the first quick cut-off valve (5), and the oil filter (4) is arranged in front of the first quick cut-off valve (5).
5. A digital gas system according to claim 4, characterized in that: the main gas path is provided with a main gas path temperature sensor (a), and the main gas path temperature sensor (a) is arranged in front of the oil filter (4).
6. A digital gas system according to claim 4, characterized in that: the gas emptying pipeline is provided with a communication point of a branch of a fourth quick cut-off valve (24) and a main gas circuit and is positioned between the natural gas regulating valve (7) and the working nozzle (8).
7. A digital gas combustion system according to claim 6, characterized in that: and the second quick cut-off valve (6) is positioned between a communication point of the main gas path and the ignition gas path and the natural gas regulating valve (7).
8. A digital gas fired system according to claim 7 wherein: a first main air path pressure sensor (b) and a second main air path pressure sensor (c) are arranged on the main air path;
the first main gas circuit pressure sensor (b) is arranged, the gas emptying pipeline is provided with a branch of a third quick cut-off valve (23) and a communication point of a main gas circuit, and between the first quick cut-off valve (5), the second main gas circuit pressure sensor (c) is arranged, and the gas emptying pipeline is provided with a branch of a fourth quick cut-off valve (24) and a communication point of the main gas circuit, and between the natural gas regulating valve (7).
9. A digital gas fired system according to claim 1 wherein: the ignition gas path is sequentially provided with a primary pressure reducing valve (9) and a secondary throttle valve (10), and the secondary throttle valve (10) is positioned in front of an ignition electromagnetic valve (11).
10. A digital gas fired system according to claim 9 wherein: and an ignition gas path pressure sensor (d) is arranged between the secondary throttle valve (10) and the ignition solenoid valve (11) in the ignition gas path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910817843.3A CN110469408B (en) | 2019-08-30 | 2019-08-30 | Digital gas system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910817843.3A CN110469408B (en) | 2019-08-30 | 2019-08-30 | Digital gas system |
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| Publication Number | Publication Date |
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| CN110469408A CN110469408A (en) | 2019-11-19 |
| CN110469408B true CN110469408B (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910817843.3A Active CN110469408B (en) | 2019-08-30 | 2019-08-30 | Digital gas system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927444A (en) * | 2012-11-05 | 2013-02-13 | 陈玲海 | Control type pressure regulating system of compressed natural gas |
| CN203102036U (en) * | 2013-01-28 | 2013-07-31 | 中国石油天然气股份有限公司 | Temperature control device for natural gas triethylene glycol dehydration sledge |
| CN205261207U (en) * | 2015-08-27 | 2016-05-25 | 天津安耐吉燃气技术有限公司 | Novel instrument wind sled at liquefied natural gas filling station |
| CN105716278A (en) * | 2014-12-23 | 2016-06-29 | 重庆恬愉石油技术有限公司 | Water jacket heater based on non-electric control |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100051110A1 (en) * | 2008-09-04 | 2010-03-04 | Ch2M Hill, Inc. | Gas actuated valve |
| US9541210B2 (en) * | 2012-10-23 | 2017-01-10 | Fluor Technologies Corporation | Pipeline pressure isolation systems and devices |
-
2019
- 2019-08-30 CN CN201910817843.3A patent/CN110469408B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927444A (en) * | 2012-11-05 | 2013-02-13 | 陈玲海 | Control type pressure regulating system of compressed natural gas |
| CN203102036U (en) * | 2013-01-28 | 2013-07-31 | 中国石油天然气股份有限公司 | Temperature control device for natural gas triethylene glycol dehydration sledge |
| CN105716278A (en) * | 2014-12-23 | 2016-06-29 | 重庆恬愉石油技术有限公司 | Water jacket heater based on non-electric control |
| CN205261207U (en) * | 2015-08-27 | 2016-05-25 | 天津安耐吉燃气技术有限公司 | Novel instrument wind sled at liquefied natural gas filling station |
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| CN110469408A (en) | 2019-11-19 |
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