CN112460637A - Dual-fuel gas turbine bleed purging system - Google Patents
Dual-fuel gas turbine bleed purging system Download PDFInfo
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- CN112460637A CN112460637A CN202011162286.5A CN202011162286A CN112460637A CN 112460637 A CN112460637 A CN 112460637A CN 202011162286 A CN202011162286 A CN 202011162286A CN 112460637 A CN112460637 A CN 112460637A
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- purging
- fuel
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- gas
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- 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
- F23R3/36—Supply of different fuels
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
The invention aims to provide a dual-fuel gas turbine bleed air purging system which comprises a dual-fuel nozzle, a fuel oil purging pipeline and a gas purging pipeline, wherein a throttling component is sequentially arranged on the fuel oil purging pipeline, the fuel purging device comprises a first-stage fuel purging way cut-off valve, a first branch pipeline of fuel and a second branch pipeline of fuel are connected at the outlet of the first-stage fuel purging way cut-off valve, a second-stage fuel purging way cut-off valve and a first check valve are sequentially installed on the first branch pipeline of fuel, a dual-fuel nozzle is connected at the rear of the first check valve, a first-stage fuel purging way cut-off valve is installed on the fuel purging pipeline, a first branch pipeline of fuel and a second branch pipeline of fuel are connected at the outlet of the first-stage fuel purging way cut-off valve, a second-stage fuel purging way cut-off valve and a second check valve are sequentially installed on the first branch pipeline of. The invention can switch on line, meet the requirements of different purging gas sources and operate continuously and stably.
Description
Technical Field
The invention relates to a gas turbine purging system, in particular to a dual-fuel gas turbine purging system.
Background
In the process of extracting crude oil, a large amount of petroleum associated gas is often produced, the associated gas has the characteristics of inflammability, explosiveness and difficulty in storage and transportation, and can be directly combusted and treated from the beginning of extraction due to safety consideration, so that serious energy waste is caused. The dual-fuel gas turbine is power equipment capable of effectively solving the problem, not only can provide power for crude oil development, but also can adopt petroleum associated gas to work as gaseous fuel, and under the condition of no shutdown, undisturbed on-line switching between the original liquid fuel and the petroleum associated gas is realized, so that the adaptability of the gas turbine to the fuel is improved, the petroleum associated gas is effectively utilized, and the requirements of various fuels in different states in the crude oil development process are met.
The bleed air purging system is one of important auxiliary systems of the dual-fuel gas turbine, and is used for meeting purging requirements of fuel channels of the dual-fuel nozzle, ensuring stable, reliable and efficient use of the dual-fuel nozzle and indirectly ensuring stable operation of the dual-fuel gas turbine. The bleed air purging system needs to meet the requirements of stable operation of equipment in the system when different purging air sources are used, the requirements of online switching of two purging air circuits when a dual-fuel gas turbine carries out online switching of different fuels, and the requirements of quick switching, emptying and the like for the system during operation and switching, and the requirements directly relate to performance parameters, reliability and service life of a dual-fuel nozzle and indirectly relate to safe and stable operation of the gas turbine.
Disclosure of Invention
The invention aims to provide a dual-fuel gas turbine bleed air purging system which can be switched on line, meets the requirements of different purge air sources and can continuously and stably operate.
The purpose of the invention is realized as follows:
the invention discloses a gas-entraining purging system of a dual-fuel gas turbine, which is characterized in that: the fuel oil purging device comprises a dual-fuel nozzle, a fuel oil purging pipeline and a fuel gas purging pipeline, wherein a throttling assembly and a first-stage fuel oil purging pipeline cut-off valve are sequentially installed on the fuel oil purging pipeline, the outlet of the first-stage fuel oil purging pipeline cut-off valve is connected with a first branch pipeline of fuel oil and a second branch pipeline of fuel oil, a second-stage fuel oil purging pipeline cut-off valve and a first check valve are sequentially installed on the first branch pipeline of fuel oil, the first branch pipeline of fuel oil is connected with the fuel oil channel interface of the dual-fuel nozzle, the fuel oil purging pipeline emptying valve is installed on the second branch pipeline of fuel oil, the first-stage fuel gas purging pipeline cut-off valve is installed on the fuel gas purging pipeline, the outlet of the first-stage fuel gas purging pipeline cut-off valve is connected with the first branch pipeline of fuel gas and the second branch pipeline of fuel gas, the second-stage fuel gas purging pipeline cut-off valve and, and a gas purging pipeline exhaust valve is arranged on the gas second branch pipeline.
The invention discloses a dual-fuel gas turbine bleed air purging system, which also comprises:
1. the fuel oil purging pipeline causes purging to use gaseous fuel as a purging air source, and the fuel gas purging pipeline causes purging to use bleed air at the outlet of the high-pressure compressor as the purging air source.
The invention has the advantages that: the invention can meet the requirement of each fuel channel of the dual-fuel nozzle on the purge gas, improve the reliability of the dual-fuel nozzle and prolong the service life; the invention can ensure that two purging gas sources (gaseous fuel and bleed air at the outlet of the high-pressure compressor) are used for stable operation; the gaseous fuel is provided by a unit fuel system, the equipment investment is reduced by utilizing the existing system of the unit, and the reliability of the system is improved by stable gas source supply; high-pressure gas is led out from the unit by the high-pressure gas compressor outlet bleed air, and the self-sufficiency rate of the unit is enhanced by utilizing the gas generated by the unit; the fuel oil channel is purged by utilizing the gaseous fuel, and the pressure and the flow are adjusted by a throttling component system in the bleed air purging system due to the high pressure of the gaseous fuel, so that the pressure and flow change requirements of the unit on the purging gas during different working conditions are met; the high-pressure air-entraining system has the advantages that the outlet of the high-pressure air-entraining system is used for entraining air to purge the gas channel, and the high-pressure air-entraining system has the characteristic of good matching between the pressure and the working condition of the unit, so that the high-pressure air-entraining system does not need to be subjected to pressure regulation treatment and can be directly supplied to the gas channel for use through the air; the invention is provided with two evacuation lines and a check valve at the system outlet to restrict the flow direction of the fluid.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:
with reference to fig. 1, a specific embodiment of a fuel passage bleed air purge system: the fuel purging pipeline 1 is sequentially connected with the throttling component 2 and the 1 st stage fuel purging pipeline cut-off valve 3; the outlet of the 1 st-stage fuel oil sweeping stop valve 3 is connected with the 2 nd-stage fuel oil sweeping stop valve 4 through a first branch pipeline and is connected with a fuel oil sweeping exhaust valve 5 through a second branch pipeline; the 2 nd-stage fuel oil scavenging path cut-off valve 4 is connected with a check valve 6; the check valve 6 is connected to a fuel passage connection 13 on the dual fuel nozzle 12.
The specific implementation mode of the gas channel bleed air purging system is as follows: the gas purging pipeline 7 is connected with a 1 st stage gas purging pipeline cut-off valve 8; the outlet of the 1 st stage gas purging circuit cut-off valve 8 is connected with the 2 nd stage gas purging circuit cut-off valve 9 through a first branch pipeline, and is connected with the gas purging circuit exhaust valve 10 through a second branch pipeline; the 2 nd stage gas purging circuit cut-off valve 9 is connected with a check valve 11; the check valve 11 is connected to a gas port 14 on the dual fuel nozzle 12.
The fuel oil channel is used for air entraining and purging to use gaseous fuel as a purging air source, and the throttling component 2 is used for adjusting the purging air, so that the flow and the pressure of the purging air can meet the requirements of the dual-fuel nozzle.
The gas channel bleed purging uses the bleed gas at the outlet of the high-pressure compressor as a purging gas source, and the high-temperature characteristic of the gas source is considered when the pipeline and the equipment are selected, so that the stable operation of the purging system is ensured.
An emptying pipeline is arranged between two-stage cut-off valves in the two-way bleed air purging, and purging emptying valves 5 and 10 are added in the pipeline, so that when the two-way bleed air purging pipeline is not used, no residual purging gas exists in the corresponding pipeline, and the safety of a purging system is ensured.
According to the invention, the fuel purge circuit cut-off valves 3 and 4, the fuel purge circuit cut-off valves 8 and 9 and the purge emptying valves 5 and 10 are all connected with a PLC control system, and an operator can control in real time through the PLC control system.
Claims (2)
1. A dual-fuel gas turbine bleed air purging system is characterized in that: the fuel oil purging device comprises a dual-fuel nozzle, a fuel oil purging pipeline and a fuel gas purging pipeline, wherein a throttling assembly and a first-stage fuel oil purging pipeline cut-off valve are sequentially installed on the fuel oil purging pipeline, the outlet of the first-stage fuel oil purging pipeline cut-off valve is connected with a first branch pipeline of fuel oil and a second branch pipeline of fuel oil, a second-stage fuel oil purging pipeline cut-off valve and a first check valve are sequentially installed on the first branch pipeline of fuel oil, the first branch pipeline of fuel oil is connected with the fuel oil channel interface of the dual-fuel nozzle, the fuel oil purging pipeline emptying valve is installed on the second branch pipeline of fuel oil, the first-stage fuel gas purging pipeline cut-off valve is installed on the fuel gas purging pipeline, the outlet of the first-stage fuel gas purging pipeline cut-off valve is connected with the first branch pipeline of fuel gas and the second branch pipeline of fuel gas, the second-stage fuel gas purging pipeline cut-off valve and, and a gas purging pipeline exhaust valve is arranged on the gas second branch pipeline.
2. The dual fuel gas turbine bleed air purge system of claim 1, wherein: the fuel oil purging pipeline causes purging to use gaseous fuel as a purging air source, and the fuel gas purging pipeline causes purging to use bleed air at the outlet of the high-pressure compressor as the purging air source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011162286.5A CN112460637A (en) | 2020-10-27 | 2020-10-27 | Dual-fuel gas turbine bleed purging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011162286.5A CN112460637A (en) | 2020-10-27 | 2020-10-27 | Dual-fuel gas turbine bleed purging system |
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| Publication Number | Publication Date |
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| CN112460637A true CN112460637A (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011162286.5A Pending CN112460637A (en) | 2020-10-27 | 2020-10-27 | Dual-fuel gas turbine bleed purging system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104345A (en) * | 2011-11-10 | 2013-05-15 | 通用电气公司 | System for purging gas fuel circuit for a gas turbine engine |
| JP2013231415A (en) * | 2012-05-02 | 2013-11-14 | Mitsubishi Heavy Ind Ltd | Purge method and purge unit for gas turbine combustor |
| CN107949696A (en) * | 2015-09-11 | 2018-04-20 | 日立汽车系统株式会社 | Control device |
| CN108375081A (en) * | 2018-03-06 | 2018-08-07 | 哈尔滨广瀚燃气轮机有限公司 | It is a kind of to fire double fuel ring-pipe type combustion chamber of the oil and gas as fuel |
| CN110513720A (en) * | 2019-08-30 | 2019-11-29 | 中国航发动力股份有限公司 | A kind of bifuel system |
-
2020
- 2020-10-27 CN CN202011162286.5A patent/CN112460637A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104345A (en) * | 2011-11-10 | 2013-05-15 | 通用电气公司 | System for purging gas fuel circuit for a gas turbine engine |
| JP2013231415A (en) * | 2012-05-02 | 2013-11-14 | Mitsubishi Heavy Ind Ltd | Purge method and purge unit for gas turbine combustor |
| CN107949696A (en) * | 2015-09-11 | 2018-04-20 | 日立汽车系统株式会社 | Control device |
| CN108375081A (en) * | 2018-03-06 | 2018-08-07 | 哈尔滨广瀚燃气轮机有限公司 | It is a kind of to fire double fuel ring-pipe type combustion chamber of the oil and gas as fuel |
| CN110513720A (en) * | 2019-08-30 | 2019-11-29 | 中国航发动力股份有限公司 | A kind of bifuel system |
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Application publication date: 20210309 |
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