CN113700559A - Dual-fuel gas turbine generator set of offshore facility - Google Patents
Dual-fuel gas turbine generator set of offshore facility Download PDFInfo
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- CN113700559A CN113700559A CN202111081815.3A CN202111081815A CN113700559A CN 113700559 A CN113700559 A CN 113700559A CN 202111081815 A CN202111081815 A CN 202111081815A CN 113700559 A CN113700559 A CN 113700559A
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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
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
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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
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
- F02C3/22—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being gaseous at standard temperature and pressure
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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
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
- F02C3/24—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being liquid at standard temperature and pressure
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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
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/045—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for noise suppression
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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
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/05—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles
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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
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/05—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles
- F02C7/052—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles with dust-separation devices
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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
- F02C7/06—Arrangements of bearings; Lubricating
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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
- F02C7/24—Heat or noise insulation
- F02C7/25—Fire protection or prevention
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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
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
- F02C9/26—Control of fuel supply
- F02C9/40—Control of fuel supply specially adapted to the use of a special fuel or a plurality of fuels
Abstract
The invention belongs to the technical field of energy power equipment, and particularly relates to a dual-fuel gas turbine generator set of an offshore facility. The invention realizes that the gas turbine generator set can be started and operated by any fuel of natural gas or fuel oil, and completes the non-disturbance switching and switching suspension function operation between double fuels in the operation process. In the running process of the unit, when the supply of fuel (such as natural gas) of offshore facilities is insufficient, the invention can complete the stable switching of standby fuel (such as fuel oil) without stopping and throwing load, thereby ensuring the stable running of an offshore power grid and electric equipment. The invention adopts the modular design and the integration technology, can meet the limitation and the requirement of the offshore platform on the arrangement of the unit and the size of the prying body, can be widely applied to offshore platform facilities and other places and facilities which use gas turbine generator sets and have higher requirements on dual fuel supply, power generation stability and reliability.
Description
Technical Field
The invention belongs to the technical field of energy power equipment, and particularly relates to a dual-fuel gas turbine generator set of an offshore facility.
Background
The dual-fuel gas turbine generator set refers to a gas turbine generator set which can use liquid (fuel oil)/gas (natural gas) fuel simultaneously by using a dual-fuel combustion technology. By implementing the dual-fuel combustion technology in the gas turbine, the adaptability of the gas turbine generator set to the fuel can be improved, the application field of the gas turbine generator set is widened, and the gas turbine generator set is widely applied to facilities and places with higher requirements on the fuel adaptability, such as offshore platforms, FPSOs and the like.
At present, the field of the domestic dual-fuel gas turbine generator set is still blank, and no engineering application success case exists. Domestic main offshore facilities such as various platforms, FPSOs and the like all adopt imported generator sets, once international disputes occur, the power supply of the offshore platforms is directly threatened, and great influence is caused on upstream oil and gas production.
Disclosure of Invention
The invention aims to provide a dual-fuel gas turbine generator set of offshore facilities, which can realize the starting and stable operation of the gas turbine generator set by using any one fuel of natural gas or fuel oil.
The purpose of the invention is realized by the following technical scheme: the skid-mounted engine comprises a main engine skid body, an air intake, exhaust and ventilation system, a fuel system, an oil system and a control system; the main engine pry body comprises a dual-fuel gas turbine (1) and a generator (2); the dual-fuel gas turbine (1) is integrally packaged in the box body (7), and a combustion air inlet, a ventilation air inlet and an air outlet are formed in the top surface of the box body (7); the generator (2) and the box body (7) are both arranged on the underframe (3), and the generator (2) is connected with the dual-fuel gas turbine (1) in the box body (7) through a coupler; the air intake, exhaust and ventilation system comprises an air intake and filtration chamber (4) and a ventilation fan (6); the air inlet filter chamber (4) divides the entering air flow into combustion air inlet and ventilation air inlet, and is respectively connected with the combustion air inlet and the ventilation air inlet of the box body (7) through air inlet channels; the ventilating fan (6) is integrated and arranged in the air inlet filtering chamber (4); the fuel system comprises a diesel pry (11), a natural gas pry (12) and a switching valve group (13); the diesel pry (11), the natural gas pry (12) and the switching valve bank (13) are installed in an independent pry body supply mode, and each pry body is connected with the main machine pry body through a pipeline between prys; the diesel pry (11) and the natural gas pry (12) carry out pre-treatment on input fuel, so that the fuel meets the use requirement of the dual-fuel gas turbine (1), meanwhile, the fuel flow is adjusted according to the power requirement, the metering feedback is completed, and the fuel switching is completed by matching with dual-fuel system equipment; the switching valve group (13) manages the purge gas from the dual-fuel gas turbine (1) again according to the setting of a control system and supplies the purge gas to the dual-fuel system equipment; the lubricating oil system is used for supplying lubricating oil to each bearing component of the dual-fuel gas turbine (1) and the generator (2).
The present invention may further comprise:
the lubricating oil system comprises a gas turbine lubricating oil skid (14), a gas turbine lubricating oil air cooler (15), a gas turbine oil-gas separator (16), a generator lubricating oil skid (17), a generator lubricating oil air cooler (18) and a generator oil-gas separator (19); the gas turbine lubricating oil air cooler (15), the gas turbine oil-gas separator (16), the generator lubricating oil skid (17), the generator lubricating oil air cooler (18) and the generator oil-gas separator (19) are installed in an independent skid manner, and all skids are connected with the main engine skid through pipelines between skids; the gas turbine lubricating oil skid (14) supplies lubricating oil to each bearing part of the dual-fuel gas turbine (1), and the lubricating oil returns to an oil tank after being cooled to the set temperature of a control system through a gas turbine lubricating oil air cooler (15) during oil return; lubricating oil supplied to the front and rear bearings of the generator (2) by the generator lubricating oil skid (17) is cooled to a set temperature of a control system by a generator lubricating oil air cooler (18) and then is supplied to the front and rear bearings of the generator (2); the gas-oil separator (16) and the generator gas-oil separator (19) are used for recovering lubricating oil after separating air from the lubricating oil.
The air-water separation stage, the F7 stage filter and the E12 stage filter are arranged in the air inlet filter chamber (4); the ventilation air enters from the ventilation air inlet of the box body (7) through the air inlet silencer (8) and the first air inlet channel under the action of the air inlet filtering chamber (4) and the ventilation fan (6) after passing through an air-water separation stage and an F7 stage filter; the combustion air enters from the combustion air inlet of the box body (7) through the air inlet silencer (5) and the second air inlet channel after sequentially passing through a gas-water separation stage, an F7 stage filter and an E12 stage filter; an air exhaust silencer (9) is arranged at an air exhaust opening of the box body (7).
The fire-gas system is also included; the fire gas system comprises a baffle valve (10) and CO2Release lever (2)0) (ii) a The baffle valve (10) is arranged at a combustion air inlet, a ventilation air inlet and an air outlet of the box body (7); said CO2The release pry (20) is arranged outside the box body (7) and is communicated with the inside of the box body (7) through a pipeline; when a fire occurs, the flapper valve (10) is closed and CO is discharged2The releasing pry (20) releases CO to the box body (7)2A gas.
The main machine prying body adopts a three-point supporting vibration isolation structure, so that the mutual influence of vibration between the machine set and facilities is reduced; the rear end of the box body (7) provides space for installing the coupler through a detachable half-moon wall plate form.
The invention has the beneficial effects that:
the invention realizes that the gas turbine generator set can be started and operated by any fuel of natural gas or fuel oil, and completes the non-disturbance switching and switching suspension function operation between double fuels in the operation process. In the running process of the unit, when the supply of fuel (such as natural gas) of offshore facilities is insufficient, the invention can complete the stable switching of standby fuel (such as fuel oil) without stopping and throwing load, thereby ensuring the stable running of an offshore power grid and electric equipment. The invention adopts the modular design and the integration technology, can meet the limitation and the requirement of the offshore platform on the arrangement of the unit and the size of the prying body, can be widely applied to offshore platform facilities and other places and facilities which use gas turbine generator sets and have higher requirements on dual fuel supply, power generation stability and reliability.
Drawings
FIG. 1 is a schematic diagram of the composition framework of the present invention.
Fig. 2 is a schematic diagram of the arrangement of the main pry bodies in the invention.
FIG. 3 is a top schematic view of the top half primary pry arrangement of FIG. 2.
Fig. 4 is a top view of the main pry arrangement of the lower half of fig. 2.
Fig. 5 is a general schematic of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention provides a dual-fuel gas turbine generator set which can be widely applied to offshore facilities, and aims to solve the blank in the field of the dual-fuel gas turbine generator set and provide a reliable and effective replacement for the dual-fuel gas turbine generator set in the application places with higher requirements on fuel supply adaptability, such as offshore platforms.
The invention aims to realize that a gas turbine generator set can be started and operated by any fuel of natural gas or fuel oil, and complete the non-disturbance switching and switching suspension function operation between double fuels in the operation process. The dual-fuel gas turbine generator set can effectively deal with the following steps: in the unit operation process, when the supply of offshore facility fuel (such as natural gas) is insufficient, the stable switching of standby fuel (such as fuel oil) is completed under the conditions of no shutdown and no load shedding, and the stable operation of an offshore power grid and electric equipment is ensured. The invention can be widely applied to offshore platform facilities and other places and facilities which use gas turbine generator sets and supply dual fuel to the offshore platform facilities and have higher requirements on power generation stability and reliability.
The invention successfully applies the self-developed dual-fuel combustion technology to the gas turbine generator set, and designs a combustion chamber and a fuel system which are suitable for the dual-fuel generator set in a brand-new way. The following breakthroughs and problems are realized and solved:
1) the gas turbine generator set can be started and stably operated by any fuel of natural gas or fuel oil.
2) The switching and supplying problems of gas/liquid two fuels in the running process of the unit are solved, and the non-disturbance switching and stopping functions of the two fuels in the running process are realized.
3) The technical breakthrough that the switching time is not more than 60s in the dual-fuel switching process is realized.
4) According to the requirements of space, bearing and arrangement of offshore facilities, a modular high-integration design is adopted, and all systems of the gas turbine generator set are integrated into a prying arrangement.
The dual-fuel gas turbine generator set mainly comprises the following components: the system comprises a dual-fuel gas turbine, a generator, an air inlet and exhaust system, a ventilation system, a fuel system, a lubricating oil system, a control system, an electrical system and a fire gas system.
The dual-fuel gas turbine 1 and the generator 2 are installed on the same underframe 3 as core equipment to jointly form a main engine prying body of the unit, so that integration, transportation and maintenance are facilitated. In order to adapt to the use environment of offshore facilities, the main machine prying body adopts a three-point supporting vibration isolation structure, and the mutual influence of vibration between the machine set and the facilities is reduced. The dual-fuel gas turbine applies dual-fuel combustion technology and adopts independently developed key components of combustion chambers such as dual-fuel nozzles, flame tubes and the like. The gas turbine generator set can be started and operated by any fuel of natural gas or fuel oil, and the undisturbed switching and switching suspension between the double fuels are completed according to the instruction of an operator in the operation process.
The air intake and exhaust system mainly comprises an air intake filter chamber 4, an air intake silencer 5 and an air intake channel. The air inlet filter chamber is provided with three stages of filtering (a gas-water separation stage, an F7 stage filter and an E12 stage filter) so as to adapt to the working environment with high humidity and high salt at sea. The air inlet silencer and the air inlet channel provide a sealed, noise-reducing and reliable channel for filtered air flow to enter the gas turbine. The main structure of the exhaust system is composed of an exhaust channel and an upper interface thereof, and different devices (such as waste heat boilers) can be adapted or exhausted according to the requirements of an operation site.
The ventilation system mainly comprises a ventilation fan 6, a box body 7, an air inlet silencer 8 and an air exhaust silencer 9. In order to improve the integration level of the whole pry, the ventilation fan 6 is integrally arranged in the air inlet filter chamber 4, and ventilation air inlet needs to be purified through a filter. The ventilation system of the unit adopts a positive pressure ventilation mode, and air after being filtered is continuously sent into the box body, so that heat on the surface of the gas turbine 1 and in the box body is taken away, and the air is discharged out of the box body 7. The baffle valve 10 is arranged at the air inlet and exhaust interface position of the box body, and when a fire disaster happens to the unit, the baffle valve is closed and the fire system is matched to realize the emergency treatment in the box body. Silencers 8 and 9 are arranged in the air inlet and outlet channel to reduce noise.
The fuel system mainly comprises the following components due to the fuel adaptability requirement of the dual-fuel unit: diesel skid 11, natural gas skid 12, switching valve group 13 and on-board dual-fuel system equipment. The diesel skid 11 and the natural gas skid 12 have the main functions of processing fuel (fuel oil/natural gas) provided by a public system to enable parameters such as pressure, filtering precision and the like to meet the use requirements of the gas turbine 1; meanwhile, the fuel flow can be adjusted according to the power requirement, the metering feedback is completed, and the fuel switching is completed by dual-fuel system equipment on the matching machine. During operation of the gas turbine 1 using diesel or natural gas fuel, the unused fuel passages and nozzles can be protected by bleed air purging of the switching valve block 13.
The lubricating oil system mainly comprises two parts: a gas turbine lubricating oil system and a generator lubricating oil system. The gas turbine lubricating oil system mainly comprises a gas turbine lubricating oil skid 14, a gas turbine lubricating oil air cooler 15 and a gas turbine oil-gas separator 16. The function of the lubricating oil circulating device is to provide stable lubricating oil supply for each bearing part of the gas turbine, assist the lubrication and cooling of the bearing, and complete the circulating supply of the lubricating oil between the lubricating oil skid 14 and the gas turbine 1 through a forced oil return system. Meanwhile, the cooling of the lubricating oil and the temperature adjustment of the oil supply temperature are completed by the lubricating oil air cooler 15. The gas-oil separator 16 can separate air from the oil in the oil return system and recover the oil. The generator lubricating oil system mainly comprises: the generator lubricating oil skid 17, the generator lubricating oil air cooler 18 and the generator oil-gas separator 19 have the functions basically consistent with those of a gas turbine lubricating oil system, and only work objects are different.
The control system monitors, controls, regulates and protects the unit at all times in the whole process of gas turbine cold blowing, starting, running, loading to the whole unit, unloading and dual-fuel switching until shutdown. The main functions of unit starting/stopping sequence control, important parameter loop regulation, running state monitoring, fault stopping protection, early warning detection and the like can be realized, and the whole set of process flow of grid-connected power generation can be reasonably and effectively realized.
The electric system mainly realizes the power supply, control, management and protection of each electric device of the gas turbine generator set.
The fire gas system is used as an independent protection emergency system of a gas turbine generator set and mainly comprises two parts: comprises a sensor,Control system including indicator and CO2Pry 20 is released. The sensor and the indicator are respectively arranged inside and outside the box body to monitor and indicate the fire fighting state in the box body 7. CO 22The releasing pry 20 is arranged outside the box body 7 and is connected through a pipeline, and when a fire occurs, CO is released under the control of a fire gas system2A gas.
In order to adapt to supply and installation conditions of offshore facilities and improve the ocean environment applicability and the arrangement space compactness of the unit, the unit adopts a modular design and an integration technology to integrate the whole set of gas turbine generator set into 7 prying bodies and a plurality of bulk supply devices.
During the production period in a factory, each pry body is independently produced and integrated, the assembly and debugging of machinery, instruments and electrical equipment required by a system are respectively completed, and a field installation interface is reserved; during field installation, all prying bodies are independently installed and are fixedly connected in a welding mode, a bolt mode and the like, pipelines and cables between the prying bodies can be uniformly configured according to installation interfaces reserved in a factory in the later period, and cross operation of various kinds of work and equipment can be conveniently carried out on the field. Wherein, only the gas turbine 1, the generator 2, the underframe 3 and the box body 7 are arranged on the main engine skid in the transportation process due to traffic limitation, and other air inlet, outlet and ventilation system components are packaged and transported separately and are arranged in place on site.
The invention has the beneficial effects that:
1. the invention can realize the starting, the running and the fuel switching of the gas turbine under the using conditions of two fuels of liquid and gas.
2. The invention can meet the requirement of offshore oil and gas facilities such as offshore platforms on the fuel adaptability of power supply equipment, can be widely applied to offshore oil and gas facilities and realizes domestic substitution.
3. The invention adopts the modular design and the integration technology, and can meet the limitation and the requirement of the offshore platform on the arrangement of the unit and the size of the prying body.
Example 1:
as shown in fig. 1, a dual-fuel gas turbine generator set of an offshore facility comprises a main engine pry body, an air intake, exhaust and ventilation system, a fuel system, an oil lubricating system and a control system; the main engine pry body comprises a dual-fuel gas turbine 1 and a generator 2; the dual-fuel gas turbine 1 is integrally packaged in the box body 7, and a combustion air inlet, a ventilation air inlet and an air outlet are formed in the top surface of the box body 7; the generator 2 and the box body 7 are both arranged on the underframe 3, and the generator 2 is connected with the dual-fuel gas turbine 1 in the box body 7 through a coupler; the air intake, exhaust and ventilation system comprises an air intake and filtration chamber 4 and a ventilation fan 6; the air inlet filter chamber 4 divides the inlet airflow into combustion air inlet and ventilation air inlet, and is respectively connected with the combustion air inlet and the ventilation air inlet of the box body 7 through air inlet channels; the ventilating fan 6 is integrally arranged in the air inlet filtering chamber 4; the fuel system comprises a diesel pry 11, a natural gas pry 12 and a switching valve group 13; the diesel pry 11, the natural gas pry 12 and the switching valve group 13 are installed in an independent pry body supply mode, and all pry bodies are connected with the main engine pry body through pipelines between the pry bodies; the diesel skid 11 and the natural gas skid 12 carry out pre-treatment on input fuel to enable the fuel to meet the use requirement of the dual-fuel gas turbine 1, meanwhile, the fuel flow is adjusted according to the power requirement to complete metering feedback, and fuel switching is completed by matching with dual-fuel system equipment; the switching valve group 13 manages the purge gas from the dual-fuel gas turbine 1 again according to the setting of the control system and supplies the purge gas to the dual-fuel system equipment; the lubricating oil system is used for supplying lubricating oil to each bearing component of the dual-fuel gas turbine 1 and the generator 2.
The dual-fuel gas turbine 1, the generator 2, the underframe 3, the air intake and exhaust system and the ventilation system are integrally implemented in a form of a main engine pry. The dual-fuel gas turbine 1 and the generator 2 are arranged on the integral underframe 3 and are respectively connected with the underframe 3 through foundation bolts.
The gas turbine 1 and the generator 2 are mechanically connected through a coupling. The attitude of the generator and the gas turbine on the underframe 3 can be adjusted through tool equipment such as jackscrews before the shaft coupling is installed, so that the centering requirements of the generator and the gas turbine are met. The box body 7 is arranged on the underframe 3, is fixedly connected with the underframe through bolts and integrally encapsulates the gas turbine in the box body. An air inlet and outlet system and a ventilation system channel interface are arranged above the box body 7.
In the fuel system, the diesel skid 11, the natural gas skid 12 and the switching valve group 13 are installed by independent skid bodies and are connected with a platform foundation by welding or foundation bolts. The fuel medium in the public system is pre-processed in the diesel pry 11 and the natural gas pry 12 through the pry pipeline connected to the main engine pry, and is supplied to the on-board dual-fuel system. The switching valve group 13 sets the purge gas from the gas turbine 1 in accordance with the control system through the control valve group thereon, and newly manages and supplies the purge gas to the gas turbine dual fuel system equipment.
Example 2:
the lubricating oil system comprises a gas turbine lubricating oil skid 14, a gas turbine lubricating oil air cooler 15, a gas engine oil-gas separator 16, a generator lubricating oil skid 17, a generator lubricating oil air cooler 18 and a generator oil-gas separator 19; the gas turbine lubricating oil air cooler 15, the gas turbine oil-gas separator 16, the generator lubricating oil skid 17, the generator lubricating oil air cooler 18 and the generator oil-gas separator 19 are installed in an independent skid manner, and all skids are connected with the main engine skid through pipelines between skids; the gas turbine lubricating oil skid 14 supplies lubricating oil to each bearing part of the dual-fuel gas turbine 1, and the lubricating oil returns to an oil tank after being cooled to the temperature set by the control system through the gas turbine lubricating oil air cooler 15 during oil return; lubricating oil supplied to the front and rear bearings of the generator 2 by the generator lubricating oil skid 17 is cooled to a set temperature of a control system by the generator lubricating oil air cooler 18 and then is supplied to the front and rear bearings of the generator 2; the gas-oil separator 16 and the generator gas-oil separator 19 are used for recovering the lubricating oil after separating the air from the lubricating oil.
In the lubricating oil system, a gas turbine lubricating oil skid 14, a gas turbine lubricating oil air cooler 15, a gas engine oil-gas separator 16, a generator lubricating oil skid 17, a generator lubricating oil air cooler 18 and a generator oil-gas separator 19 are installed in an independent skid mode and are connected with a platform foundation in a welding or foundation bolt mode. Each prying body is connected with the main machine prying body through pipelines between the prying bodies so as to realize circulation of lubricating oil media. In the gas turbine lubricating oil system, the return oil of the gas turbine 1 is cooled to the temperature set by the control system through the gas turbine air cooler 15 and returns to the oil tank; in the generator lubricating oil system, the lubricating oil supplied from the generator lubricating oil tank passes through the cooler 18, the temperature of the lubricating oil is controlled to the temperature set by the control system, and then the lubricating oil is supplied to the front and rear bearings of the generator 2.
Example 3:
in the intake/exhaust and ventilation system, the intake filter chamber 4 is provided with three stages of filtration (a gas-water separation stage, a filter of F7 stage, and a filter of E12 stage). The incoming airflow is divided into combustion intake and ventilation intake. Wherein, the ventilation air enters through a gas-water separation stage and an F7 stage filter, then leaves the air inlet filter chamber to enter an air inlet silencer 8 and a channel under the action of a box body ventilation fan 6, finally flows into a box body 7 to finish heat exchange, and then is discharged out of the whole ventilation system through an air exhaust silencer 9 and a channel part; the combustion gas is passed through a gas-water separation stage, a filter of stage F7, a filter of stage E12, then through the gas inlet silencer 5 and the passages and finally into the through-flow parts of the gas turbine. And the gas discharged by the gas turbine is connected with subsequent waste heat utilization equipment through an interface.
Example 4:
the control system, the electric system and the fire gas system are used for connecting the sensors, the actuators and the control elements on each prying body device with the control, electric and fire gas panel cabinets through cables. Wherein the fire gas system is used as an independent protection emergency system of the unit and is configured with CO2Release sled 20 is connected with the box through the fire service pipeline. When fire occurs, under the coordination of the fire gas system and the control system, CO2Releasing fire extinguishing agent (CO) in sled 202) Will be released through the conduit to the interior of the tank. And a baffle valve 10 is arranged at the air inlet interface and the air outlet interface so as to meet the sealing/opening requirements of the box body in different states. The rear end of the box body 7 provides space for installing the coupler through a detachable half-moon wall plate mode.
Example 5:
the main machine prying body adopts a three-point supporting vibration isolation structure, so that the mutual influence of vibration between the machine set and facilities is reduced; the rear end of the box body 7 provides space for installing the coupler through a detachable half-moon wall plate mode. An AVM vibration reduction table is arranged below the underframe 3 in a three-point supporting mode and is connected with a platform foundation through a connecting piece.
The working principle of the invention is as follows:
when the dual-fuel gas turbine generator set is started, the gas turbine control system, the electrical system and the fire gas system are always in a commissioning state. And the gas turbine lubricating oil system, the generator lubricating oil system, the air inlet and exhaust system, the ventilation system and the fuel system perform lubricating oil heating and circulation, open the ventilation baffle valve and open or close the valve according to the process design under the instruction of the control system, so that the preparation and the interlocking inspection before the gas turbine is started are completed.
The gas turbine can then be started and operated stably using either natural gas or oil fuel under the command of the control system. During the operation of the unit, the attachable system provides necessary support for the unit under the monitoring of the control system. When dual fuel switching is performed, in a fuel system, a diesel pry and a natural gas pry are alternately put into use, and a switching valve group needs to switch the supply source of purge gas. And finally, the dual-fuel quick and stable switching is realized.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A dual-fuel gas turbine generator set of an offshore facility is characterized in that: the skid-mounted engine comprises a main engine skid body, an air intake, exhaust and ventilation system, a fuel system, an oil system and a control system; the main engine pry body comprises a dual-fuel gas turbine (1) and a generator (2); the dual-fuel gas turbine (1) is integrally packaged in the box body (7), and a combustion air inlet, a ventilation air inlet and an air outlet are formed in the top surface of the box body (7); the generator (2) and the box body (7) are both arranged on the underframe (3), and the generator (2) is connected with the dual-fuel gas turbine (1) in the box body (7) through a coupler; the air intake, exhaust and ventilation system comprises an air intake and filtration chamber (4) and a ventilation fan (6); the air inlet filter chamber (4) divides the entering air flow into combustion air inlet and ventilation air inlet, and is respectively connected with the combustion air inlet and the ventilation air inlet of the box body (7) through air inlet channels; the ventilating fan (6) is integrated and arranged in the air inlet filtering chamber (4); the fuel system comprises a diesel pry (11), a natural gas pry (12) and a switching valve group (13); the diesel pry (11), the natural gas pry (12) and the switching valve bank (13) are installed in an independent pry body supply mode, and each pry body is connected with the main machine pry body through a pipeline between prys; the diesel pry (11) and the natural gas pry (12) carry out pre-treatment on input fuel, so that the fuel meets the use requirement of the dual-fuel gas turbine (1), meanwhile, the fuel flow is adjusted according to the power requirement, the metering feedback is completed, and the fuel switching is completed by matching with dual-fuel system equipment; the switching valve group (13) manages the purge gas from the dual-fuel gas turbine (1) again according to the setting of a control system and supplies the purge gas to the dual-fuel system equipment; the lubricating oil system is used for supplying lubricating oil to each bearing component of the dual-fuel gas turbine (1) and the generator (2).
2. The dual fuel gas turbine power generation unit of an offshore facility as claimed in claim 1, wherein: the lubricating oil system comprises a gas turbine lubricating oil skid (14), a gas turbine lubricating oil air cooler (15), a gas turbine oil-gas separator (16), a generator lubricating oil skid (17), a generator lubricating oil air cooler (18) and a generator oil-gas separator (19); the gas turbine lubricating oil air cooler (15), the gas turbine oil-gas separator (16), the generator lubricating oil skid (17), the generator lubricating oil air cooler (18) and the generator oil-gas separator (19) are installed in an independent skid manner, and all skids are connected with the main engine skid through pipelines between skids; the gas turbine lubricating oil skid (14) supplies lubricating oil to each bearing part of the dual-fuel gas turbine (1), and the lubricating oil returns to an oil tank after being cooled to the set temperature of a control system through a gas turbine lubricating oil air cooler (15) during oil return; lubricating oil supplied to the front and rear bearings of the generator (2) by the generator lubricating oil skid (17) is cooled to a set temperature of a control system by a generator lubricating oil air cooler (18) and then is supplied to the front and rear bearings of the generator (2); the gas-oil separator (16) and the generator gas-oil separator (19) are used for recovering lubricating oil after separating air from the lubricating oil.
3. The dual fuel gas turbine power generation unit for an offshore facility as claimed in claim 1 or 2, wherein: the air-water separation stage, the F7 stage filter and the E12 stage filter are arranged in the air inlet filter chamber (4); the ventilation air enters from the ventilation air inlet of the box body (7) through the air inlet silencer (8) and the first air inlet channel under the action of the air inlet filtering chamber (4) and the ventilation fan (6) after passing through an air-water separation stage and an F7 stage filter; the combustion air enters from the combustion air inlet of the box body (7) through the air inlet silencer (5) and the second air inlet channel after sequentially passing through a gas-water separation stage, an F7 stage filter and an E12 stage filter; an air exhaust silencer (9) is arranged at an air exhaust opening of the box body (7).
4. The dual fuel gas turbine power generation unit for an offshore facility as claimed in claim 1 or 2, wherein: the fire-gas system is also included; the fire gas system comprises a baffle valve (10) and CO2-releasing the sled (20); the baffle valve (10) is arranged at a combustion air inlet, a ventilation air inlet and an air outlet of the box body (7); said CO2The release pry (20) is arranged outside the box body (7) and is communicated with the inside of the box body (7) through a pipeline; when a fire occurs, the flapper valve (10) is closed and CO is discharged2The releasing pry (20) releases CO to the box body (7)2A gas.
5. The dual fuel gas turbine power generation unit of an offshore facility as claimed in claim 3, wherein: the fire-gas system is also included; the fire gas system comprises a baffle valve (10) and CO2-releasing the sled (20); the baffle valve (10) is arranged at a combustion air inlet, a ventilation air inlet and an air outlet of the box body (7); said CO2The release pry (20) is arranged outside the box body (7) and is communicated with the inside of the box body (7) through a pipeline; when a fire occurs, the flapper valve (10) is closed and CO is discharged2The releasing pry (20) releases CO to the box body (7)2A gas.
6. The dual fuel gas turbine power generation unit for an offshore facility as claimed in claim 1 or 2, wherein: the main machine prying body adopts a three-point supporting vibration isolation structure, so that the mutual influence of vibration between the machine set and facilities is reduced; the rear end of the box body (7) provides space for installing the coupler through a detachable half-moon wall plate form.
7. The dual fuel gas turbine power generation unit of an offshore facility as claimed in claim 3, wherein: the main machine prying body adopts a three-point supporting vibration isolation structure, so that the mutual influence of vibration between the machine set and facilities is reduced; the rear end of the box body (7) provides space for installing the coupler through a detachable half-moon wall plate form.
8. The dual fuel gas turbine power generation unit of an offshore facility as claimed in claim 4, wherein: the main machine prying body adopts a three-point supporting vibration isolation structure, so that the mutual influence of vibration between the machine set and facilities is reduced; the rear end of the box body (7) provides space for installing the coupler through a detachable half-moon wall plate form.
9. The dual fuel gas turbine power generation unit of an offshore facility as claimed in claim 5, wherein: the main machine prying body adopts a three-point supporting vibration isolation structure, so that the mutual influence of vibration between the machine set and facilities is reduced; the rear end of the box body (7) provides space for installing the coupler through a detachable half-moon wall plate form.
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