CN114183249B - Fuel supply system of dual-fuel gas turbine - Google Patents
Fuel supply system of dual-fuel gas turbine Download PDFInfo
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- CN114183249B CN114183249B CN202111519904.1A CN202111519904A CN114183249B CN 114183249 B CN114183249 B CN 114183249B CN 202111519904 A CN202111519904 A CN 202111519904A CN 114183249 B CN114183249 B CN 114183249B
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- fuel
- pressure
- gas turbine
- pump
- valve
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Classifications
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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
-
- 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
- F02C7/232—Fuel valves; Draining valves or 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
- F02C7/22—Fuel supply systems
- F02C7/236—Fuel delivery systems comprising two or more pumps
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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
The present utility model provides a fuel supply system for a dual-fuel gas turbine, which is capable of operating with fuel oil and natural gas as fuel, respectively, and of achieving a mutual switching between the two fuels. According to the operation requirement of the gas turbine, in order to ensure that the supply pressure of the fuel can meet the ignition starting and normal operation requirements of a unit when the gas turbine operates by using the fuel, and optimize the preparation time of a fuel system, a fuel supply system is designed based on a serial pump system, the fuel in a fuel tank is pumped out by arranging a delivery pump and is delivered to a downstream pipeline, a bypass pipeline with a self-operated pressure regulating valve is arranged behind the pump, and the fuel pressure in the pipeline reaches the pressure requirement of an ignition branch of the gas turbine by controlling the bypass discharge quantity. The fuel oil after pressure regulation reaches the booster pump, and is boosted to a higher pressure required by the operation of the gas turbine through the booster pump. And filters are arranged at the upstream of the delivery pump and the booster pump to protect the pump body.
Description
Technical Field
The patent relates to the technical field of gas turbines, in particular to a fuel supply system for a dual-fuel gas turbine.
Background
1) A certain domestic 25MW dual-fuel gas turbine can use natural gas and fuel oil as fuels, and can realize the mutual switching of the two fuels.
2) The fuel supply system of the gas turbine is used for providing fuel meeting the starting and running requirements for the gas turbine. However, due to the special requirements of certain domestic 25MW dual fuel gas turbines, the required ignition fuel pressure at start-up is not the same as the fuel supply pressure requirement at run-up.
3) In order to solve the fuel supply requirement of the gas turbine, a mode of connecting pumps in series is used, a low-pressure delivery pump with matched flow is connected with a high-pressure booster pump in series, the pressure of the low-pressure delivery pump is used for meeting the ignition requirement, meanwhile, operating fuel is supplied to the high-pressure booster pump, and then the high-pressure booster pump is used for boosting, so that the fuel pressure reaches the operating requirement.
Disclosure of Invention
The utility model aims to provide a fuel supply system of a dual-fuel gas turbine, which is characterized in that a delivery pump with self-absorption capacity and a booster pump with higher output pressure are selected for realizing fuel supply of the gas turbine in the starting and running processes, and the two pumps are connected in series. The fuel in the fuel tank is sucked by the delivery pump and is initially pressurized, before being sent to the plunger pump, to a higher pressure required for the operation of the gas turbine.
The purpose of the utility model is realized in the following way: a first pneumatic ball valve is arranged at an inlet of the fuel system, a first manual ball valve and a third manual ball valve are respectively arranged at the upper and lower streams of the first pneumatic ball valve, a bypass pipeline with a fourth manual ball valve is arranged beside the first pneumatic ball valve, fuel is prefiltered through a Y-type filter after passing through the first pneumatic ball valve, and a delivery pump pressurizes the fuel and monitors the running state of the pump through a pressure gauge; after passing through the delivery pump, the fuel enters a duplex filter for fine filtration, the pressure guiding pipes of the differential pressure transmitter are respectively arranged at the upper and lower streams of the duplex filter, and a bypass with a self-operated pressure regulating valve and a one-way valve is arranged at the lower stream of the duplex filter; the temperature and pressure of the fuel oil subjected to pressure regulation by the self-operated pressure regulating valve are monitored by a thermal resistor and a pressure meter of a pressure transmitter; the fuel oil after pressure regulation enters a gas turbine ignition pipeline through a branch and is used for ignition of the gas turbine; the fuel oil after pressure regulation enters a booster pump for boosting, a metal hose is arranged at the downstream of the booster pump, a bypass channel with a pneumatic ball valve II is used for conveying the fuel oil to the downstream of the booster pump in the fuel switching preparation stage by a conveying pump, so that the advanced filling of the fuel oil is realized, and the pneumatic ball valve II is closed at the same time of starting the booster pump; the downstream of the booster pump is provided with an overflow valve, which is used for discharging the fuel oil output by the booster pump to the fuel tank when the system flow is blocked, the fuel oil discharged by the self-operated pressure regulating valve and the overflow valve is gathered to the same pipeline to return to the fuel tank, and a one-way valve is arranged on the pipeline; the fuel after booster pump pressure boost enters into basket filter, filters by basket filter, basket filter's the upper reaches is provided with thermal resistor, and the low reaches of basket filter is the system's export promptly and is provided with the manometer, and differential pressure transmitter's draw the pressure pipe to set up respectively in basket filter's upper and lower reaches for monitor the state of fence type filter, remind the user in time to change the filter core.
The utility model also includes such structural features:
1. the duplex filter is one-use and one-standby, and can realize real-time switching, so that the system can be ensured to normally operate.
2. The self-operated pressure regulating valve is used for taking pressure before the valve, monitoring the pressure at the downstream of the delivery pump, regulating the pressure in the process to 0.18-0.3 MPa by adjusting the opening of the valve, and returning the discharged fuel to the fuel tank through a pipeline.
Compared with the prior art, the utility model has the beneficial effects that: dual fuel gas turbines are typically capable of operating on fuel oil and natural gas, respectively, and of achieving a mutual switching between the two fuels. According to the operation requirement of the gas turbine, in order to ensure that the supply pressure of the fuel can meet the ignition starting and normal operation requirements of a unit when the gas turbine operates by using the fuel, and optimize the preparation time of a fuel system, a fuel supply system is designed based on a serial pump system, the fuel in a fuel tank is pumped out by arranging a delivery pump and is delivered to a downstream pipeline, a bypass pipeline with a self-operated pressure regulating valve is arranged behind the pump, and the fuel pressure in the pipeline reaches the pressure requirement of an ignition branch of the gas turbine by controlling the bypass discharge quantity. The fuel oil after pressure regulation reaches the booster pump, and is boosted to a higher pressure required by the operation of the gas turbine through the booster pump. And filters are arranged at the upstream of the delivery pump and the booster pump to protect the pump body.
Drawings
In order to clearly express the technical scheme of the utility model, the drawings required by the utility model are briefly described below. It should be noted that the drawings in the following description are only some embodiments of the present utility model, and further design considerations may be obtained by those skilled in the relevant art with reference to the drawings.
FIG. 1 is an exemplary illustration of a dual fuel gas turbine of the present utility model.
Part number description in the drawings: 1-a first manual ball valve; 2-a first pneumatic ball valve; 3-a manual ball valve III; 4-a manual ball valve IV; a 5-Y filter; 6-a delivery pump; 7-a pressure gauge; 8-duplex filter; 9-a differential pressure transmitter; 10-thermal resistance; 11-a pressure transmitter; 12-a pressure gauge; 13-a booster pump; 14-a metal hose; 15-a pneumatic ball valve II; 16-overflow valve; 17-thermal resistance; 18-basket filter; 19-a differential pressure transmitter; 20-a pressure gauge; 21-a manual ball valve; 22-pressure transmitter; 23-a pressure reducing valve; 24-a one-way valve; 25-self-operated pressure regulating valve.
Detailed Description
The following description of the embodiments of the present utility model will be made with reference to the accompanying drawings, in which it is to be noted that the embodiments described are some, but not all, embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive design, are intended to fall within the scope of the utility model.
When the two pumps are designed in series, the rated flow of the screw pump is higher than that of the plunger pump, and the coefficient can be 1.3-1.5; the outlet pressure of the delivery pump is 0.5MPa, a bypass pipeline is arranged behind the delivery pump, a self-operated pressure regulating valve for taking pressure before a valve is arranged, the pressure after the delivery pump is reduced to 0.18-0.3 MPa by regulating backflow, and an oil supply branch pipe of an ignition circuit of the gas turbine is led out from a pipeline after pressure regulation to supply fuel oil to the ignition circuit of the gas turbine. The fuel oil after pressure regulation enters the inlet of a main flow Cheng Zhusai pump, is pressurized to 8MPa, and is fed into an operating oil way of the gas turbine. Besides the delivery pump, the booster pump and the self-operated pressure regulating valve, necessary pressure and temperature meters are arranged in the system to monitor the running state of the system, and a filter is arranged in the system to protect the pump and ensure the fuel cleanliness requirement required by the gas turbine.
As shown in fig. 1, a first pneumatic ball valve 2 is arranged at the inlet of the fuel system and is used for cutting off the fuel supply in case of emergency such as fire and the like so as to realize isolation; the upper and lower streams of the pneumatic ball valve I2 are respectively provided with a manual ball valve I1 and a manual ball valve III 3, and the manual ball valves I1 are used for isolation during overhauling. A bypass pipeline with a manual ball valve IV 4 is arranged beside the pneumatic ball valve 1 and used for ensuring smooth fuel supply when the pneumatic ball valve overhauls or fails; after passing through the first pneumatic ball valve 1, the fuel is prefiltered through the Y-shaped filter 5 for protecting the delivery pump 6; the fuel is pressurized to 0.5MPa by the delivery pump 6, and the running state of the pump is monitored by the pressure gauge 7; after passing through the delivery pump, the fuel enters the duplex filter 8 for fine filtration, and pressure guiding pipes of the differential pressure transmitter 9 are respectively arranged at the upper and lower streams of the duplex filter 8 and used for monitoring the state of the duplex filter 8 and reminding a user to switch the filter or replace the filter element; the duplex filter 8 is one-by-one, can realize real-time switching, and ensures that the system can normally operate; downstream of the duplex filter 8, a bypass with a self-operated pressure regulating valve 25 and a one-way valve 24 is provided for regulating the supply pressure downstream of the delivery pump 6; the self-operated pressure regulating valve 25 is used for taking pressure before a valve, monitoring the pressure at the downstream of the delivery pump 6, regulating the pressure in the process to 0.18-0.3 MPa by adjusting the opening of the valve, and returning the discharged fuel to the fuel tank through a pipeline; the temperature and pressure of the fuel oil subjected to pressure regulation by the self-operated pressure regulating valve 25 are monitored by the thermal resistor 10 and the pressure gauge 12 of the pressure transmitter 11; the pressure gauge 12 is used for visually displaying the fuel pressure value after pressure regulation, and can be used for setting the set value of the self-operated pressure regulating valve 25; the fuel oil after pressure regulation enters a gas turbine ignition pipeline through a branch and is used for ignition of the gas turbine; the fuel oil after pressure regulation enters the booster pump 13 immediately, and is boosted to 8MPa by the booster pump 13; a metal hose 14 is arranged at the downstream of the booster pump 13 and used for absorbing pump operation vibration and protecting a system; the bypass channel with the pneumatic ball valve II 15 is used for conveying fuel to the downstream of the booster pump by the delivery pump in the fuel switching preparation stage, so that the advanced filling of the fuel is realized, the oiling time of a downstream pipeline after the booster pump is started is saved, and the time required by fuel switching is reduced; the pneumatic ball valve II 15 is closed when the booster pump is started; an overflow valve 16 is arranged at the downstream of the booster pump 13 and is used for discharging fuel output by the booster pump 13 to a fuel tank when the system flow is blocked, so that the downstream overpressure of the booster pump 13 is prevented, and equipment is prevented from being damaged; the fuel released by the self-operated pressure regulating valve 25 and the overflow valve 16 is collected to the same pipeline to return to the fuel tank, and a one-way valve 24 is arranged for avoiding the backflow of the high-pressure fuel released by the overflow valve 16; the fuel oil after being pressurized by the booster pump 25 enters the basket filter 18, and is filtered by the basket filter 18, so that the related equipment of the gas turbine is protected; a thermal resistor 17 is arranged at the upstream of the basket filter 18, and the temperature of the pressurized fuel is monitored; downstream of the basket filter 18, i.e. at the system outlet, a pressure gauge 20 is provided for monitoring the fuel pressure at the system outlet; the pressure guiding pipes of the differential pressure transmitter 19 are respectively arranged at the upper stream and the lower stream of the basket filter 18 and used for monitoring the state of the basket filter 18 and reminding a user of timely replacing the filter element.
Claims (3)
1. A dual fuel gas turbine fuel supply system characterized by: a first pneumatic ball valve is arranged at an inlet of the fuel system, a first manual ball valve and a third manual ball valve are respectively arranged at the upper and lower streams of the first pneumatic ball valve, a bypass pipeline with a fourth manual ball valve is arranged beside the first pneumatic ball valve, fuel is prefiltered through a Y-type filter after passing through the first pneumatic ball valve, and a delivery pump pressurizes the fuel and monitors the running state of the pump through a pressure gauge; after passing through the delivery pump, the fuel enters a duplex filter for fine filtration, the pressure guiding pipes of the differential pressure transmitter are respectively arranged at the upper and lower streams of the duplex filter, and a bypass with a self-operated pressure regulating valve and a one-way valve is arranged at the lower stream of the duplex filter; the temperature and pressure of the fuel oil subjected to pressure regulation by the self-operated pressure regulating valve are monitored by a thermal resistor and a pressure meter of a pressure transmitter; the fuel oil after pressure regulation enters a gas turbine ignition pipeline through a branch and is used for ignition of the gas turbine; the fuel oil after pressure regulation enters a booster pump for boosting, a metal hose is arranged at the downstream of the booster pump, a bypass channel with a pneumatic ball valve II is used for conveying the fuel oil to the downstream of the booster pump in the fuel switching preparation stage by a conveying pump, so that the advanced filling of the fuel oil is realized, and the pneumatic ball valve II is closed at the same time of starting the booster pump; the downstream of the booster pump is provided with an overflow valve, which is used for discharging the fuel oil output by the booster pump to the fuel tank when the system flow is blocked, the fuel oil discharged by the self-operated pressure regulating valve and the overflow valve is gathered to the same pipeline to return to the fuel tank, and a one-way valve is arranged on the pipeline; the fuel after booster pump pressure boost enters into basket filter, filters by basket filter, basket filter's the upper reaches is provided with thermal resistor, and the low reaches of basket filter is the system's export promptly and is provided with the manometer, and differential pressure transmitter's draw the pressure pipe to set up respectively in basket filter's upper and lower reaches for monitor basket filter's state, remind the user in time to change the filter core.
2. The dual fuel gas turbine fuel supply system of claim 1, wherein: the duplex filter is one-use and one-standby, and can realize real-time switching, so that the system can be ensured to normally operate.
3. The dual fuel gas turbine fuel supply system of claim 1, wherein: the self-operated pressure regulating valve is used for taking pressure before the valve, monitoring the pressure at the downstream of the delivery pump, regulating the pressure in the process to 0.18-0.3 MPa by adjusting the opening of the valve, and returning the discharged fuel to the fuel tank through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111519904.1A CN114183249B (en) | 2021-12-13 | 2021-12-13 | Fuel supply system of dual-fuel gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111519904.1A CN114183249B (en) | 2021-12-13 | 2021-12-13 | Fuel supply system of dual-fuel gas turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114183249A CN114183249A (en) | 2022-03-15 |
| CN114183249B true CN114183249B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111519904.1A Active CN114183249B (en) | 2021-12-13 | 2021-12-13 | Fuel supply system of dual-fuel gas turbine |
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| CN (1) | CN114183249B (en) |
Citations (13)
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| CN207786285U (en) * | 2017-12-25 | 2018-08-31 | 扬州电力设备修造厂有限公司 | Hydrogen cooled generator hydrogen dryer |
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| CN114183249A (en) | 2022-03-15 |
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