CN113700559B - 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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- CN113700559B CN113700559B CN202111081815.3A CN202111081815A CN113700559B CN 113700559 B CN113700559 B CN 113700559B CN 202111081815 A CN202111081815 A CN 202111081815A CN 113700559 B CN113700559 B CN 113700559B
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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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- F02C7/24—Heat or noise insulation
- F02C7/25—Fire protection or prevention
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
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 can finish the undisturbed switching and switching stopping function operation of the dual fuels in the operation process. In the running process of the unit, when the fuel (such as natural gas) of the offshore facility is not supplied enough, the invention can finish the stable switching of the standby fuel (such as fuel oil) under the conditions of no shutdown and no load throwing, and ensure the stable running of the offshore power grid and the electric equipment. The invention adopts modularized design and integration technology, can meet the limitation and requirement of offshore platform on unit arrangement and prying body size, can be widely applied to offshore platform facilities and other places and facilities using gas turbine generator sets and having 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
A dual-fuel gas turbine generator set refers to a gas turbine generator set that 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 fuel can be improved, the application field of the gas turbine generator set can be widened, and the gas turbine generator set can be widely applied to facilities and places such as offshore platforms, FPSO (floating production storage and offloading) and the like with higher requirements on fuel adaptability.
At present, the field of the domestic dual-fuel gas turbine generator set is still blank, and no engineering application success cases exist temporarily. Domestic main offshore facilities such as various platforms, FPSOs and the like all adopt imported generator sets, and once international disputes occur, the electric power supply of the offshore platforms is directly threatened, so that the upstream oil gas production is greatly influenced.
Disclosure of Invention
The invention aims to provide a dual-fuel gas turbine generator set of an offshore facility, which can realize that the gas turbine generator set can be started and stably operated by any fuel of natural gas or fuel oil.
The aim of the invention is realized by the following technical scheme: the engine comprises a main engine pry body, an air inlet and outlet and ventilation system, a fuel system, an lubricating 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 a 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 inlet and outlet and ventilation system comprises an air inlet filter 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 ventilation fan (6) is integrally arranged in the air inlet filter chamber (4); the fuel system comprises a diesel skid (11), a natural gas skid (12) and a switching valve group (13); the diesel engine skid (11), the natural gas skid (12) and the switching valve group (13) are all installed by independent skid bodies for supplying goods, and each skid body is connected with the main engine skid body through a skid pipeline; the diesel skid (11) and the natural gas skid (12) are used for pre-processing the input fuel to enable the input fuel to meet the use requirement of the dual-fuel gas turbine (1), and simultaneously, the fuel flow is regulated according to the power requirement to complete metering feedback and complete fuel switching in cooperation with dual-fuel system equipment; the switching valve group (13) is used for re-managing the purge gas from the dual-fuel gas turbine (1) according to the control system setting and supplying the purge gas into 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 invention may further include:
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 fuel engine lubricating oil air cooler (15), the fuel engine oil-gas separator (16), the generator lubricating oil pry (17), the generator lubricating oil air cooler (18) and the generator oil-gas separator (19) are all arranged in a way of supplying goods by independent pry bodies, and each pry body is connected with the main engine pry body through a pry pipeline; the gas turbine lubricating sled (14) supplies lubricating oil to each bearing component of the dual-fuel gas turbine (1), and 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; the lubricating oil supplied to the front and rear bearings of the generator (2) by the generator lubricating oil sled (17) is firstly cooled to the set temperature of the control system by the generator lubricating oil air cooler (18) and then 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 inlet filter chamber (4) is internally provided with a gas-water separation stage, an F7 stage filter and an E12 stage filter; after passing through the gas-water separation stage and the F7-stage filter, the ventilation air enters from a ventilation air inlet of the box body (7) through an air inlet silencer (8) and a first air inlet channel under the action of an air inlet filter chamber (4) and a ventilation fan (6); the combustion air enters from a combustion air inlet of the box body (7) through an air inlet silencer (5) and a second air inlet channel after sequentially passing through a gas-water separation stage, an F7 filter and an E12 filter; an exhaust silencer (9) is arranged at the exhaust outlet of the box body (7).
The fire gas system is also included; the fire gas system comprises a baffle valve (10) and a CO 2 release 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); the CO 2 release sled (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 baffle valve (10) is closed, and the CO 2 release sled (20) releases CO 2 gas to the box (7).
The main machine prying body adopts a three-point supporting vibration isolation structure, so that the vibration interaction between a machine set and facilities is reduced; the rear end of the box body (7) is in a detachable half moon wall plate form, so that space is provided for the installation of the coupler.
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 can finish the undisturbed switching and switching stopping function operation of the dual fuels in the operation process. In the running process of the unit, when the fuel (such as natural gas) of the offshore facility is not supplied enough, the invention can finish the stable switching of the standby fuel (such as fuel oil) under the conditions of no shutdown and no load throwing, and ensure the stable running of the offshore power grid and the electric equipment. The invention adopts modularized design and integration technology, can meet the limitation and requirement of offshore platform on unit arrangement and prying body size, can be widely applied to offshore platform facilities and other places and facilities using gas turbine generator sets and having higher requirements on dual fuel supply, power generation stability and reliability.
Drawings
FIG. 1 is a schematic diagram of the component framework of the present invention.
Fig. 2 is a schematic view of the arrangement of the main prying body in the invention.
Fig. 3 is a schematic top view of the top half of the primary sled arrangement of fig. 2.
Fig. 4 is a schematic top view of the primary sled arrangement of the bottom 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.
In order to solve the blank in the field of domestic dual-fuel gas turbine generator sets, reliable and effective domestic gas turbine generator set substitution is provided for application places such as offshore platforms and the like with high requirements on fuel supply adaptability, and the dual-fuel gas turbine generator set capable of being widely applied to offshore facilities is provided.
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 the undisturbed switching and switching stopping functional operation of the dual fuels can be completed in the operation process. The dual-fuel gas turbine generator set can effectively cope with: in the running process of the unit, when the fuel (such as natural gas) of the offshore facility is not supplied enough, the stable switching of the standby fuel (such as fuel oil) is completed under the conditions of no shutdown and no load throwing, and the stable running of the offshore power grid and the electric equipment is ensured. The invention can be widely applied to offshore platform facilities and other places and facilities using gas turbine generator sets and having higher requirements on dual fuel supply, power generation stability and reliability.
The invention successfully applies the self-grinding dual-fuel combustion technology to the gas turbine generator set, and a combustion chamber and a fuel system suitable for the dual-fuel generator set are newly designed. Realize and solve the following breakthrough and problems:
1) The gas turbine generator set can be started and stably operated by any fuel of natural gas or fuel oil.
2) The problem of switching and supplying of two fuels of gas/liquid in the running process of the unit is solved, and the functions of non-disturbance switching and switching suspension of the dual fuels in the running process are realized.
3) The technical breakthrough of the switching time of no more than 60s in the dual-fuel switching process is realized.
4) According to the space, bearing and arrangement requirements of offshore facilities, a modularized high-integration design is adopted to integrate all the systems of the gas turbine generator set into a prying arrangement.
The main components of the dual-fuel gas turbine generator set in the invention include: the system comprises a dual-fuel gas turbine, a generator, an air inlet and outlet 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 used as core equipment to be installed on the same underframe 3 to form a main engine pry body of the unit together so as to be convenient for integration, transportation and maintenance. In order to adapt to the use environment of offshore facilities, the main machine prying body adopts a three-point supporting vibration isolation structure, so that the vibration interaction between a unit and facilities is reduced. The dual-fuel gas turbine adopts a dual-fuel combustion technology and adopts key components of a combustion chamber such as a self-developed dual-fuel nozzle, a flame tube 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 of the dual fuels can be completed according to the instruction of an operator in the operation process.
The air intake and exhaust system mainly comprises an air intake filtering chamber 4, an air intake muffler 5 and an air intake passage. The air inlet filter chamber is provided with three stages of filters (a gas-water separation stage, an F7 stage filter and an E12 stage filter) so as to adapt to the working environment of high humidity and high salt on the sea. The air inlet muffler and the air inlet channel provide a sealed, noise-reducing and reliable channel for the filtered air flow to enter the gas turbine. The main structure of the exhaust system is an exhaust channel and an upper interface thereof, and different devices (such as a waste heat boiler) or emission can be adapted 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 whole sled integration level, 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 unit ventilation system adopts a positive pressure ventilation mode, continuously sends the filtered air into the box body, takes away the heat on the surface of the gas turbine 1 and in the box body, and discharges the heat outside the box body 7. And a baffle valve 10 is arranged at the position of an air inlet and air outlet interface of the box body, and when a fire disaster occurs in the unit, emergency treatment in the box body is realized by closing the baffle valve and matching with a fire gas system. The air intake and exhaust channels are provided with silencers 8 and 9 to reduce noise.
The fuel system mainly comprises the following components due to the fuel suitability requirement of the dual-fuel unit: diesel skid 11, natural gas skid 12, switch valve bank 13 and on-board dual fuel system equipment. The diesel skid 11 and the natural gas skid 12 have the main functions that fuel (fuel oil/natural gas) provided by a public system is treated, so that parameters such as pressure, filtering precision and the like of the fuel are met with the use requirements of the gas turbine 1; simultaneously, the fuel flow can be regulated according to the power demand, metering feedback is completed, and fuel switching is completed by matching with on-board dual-fuel system equipment. During operation of the gas turbine 1 with diesel or natural gas fuel, the unused fuel channels and nozzles can be protected by bleed air purging of the switching valve block 13.
The lubricating oil system mainly comprises two parts: gas turbine oil system and generator 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 circulation device is to provide stable lubricating oil supply for each bearing part of the gas turbine, assist bearing lubrication and cooling, and complete the circulation supply of lubricating oil between the lubricating oil skid 14 and the gas turbine 1 through a forced oil return system. Meanwhile, cooling of the lubricating oil and temperature adjustment of the oil supply temperature are completed through the lubricating oil air cooler 15. The gas-oil separator 16 may separate air from the oil in the return system and recover the oil. The generator lubricating oil system mainly comprises the following components: the functions of the generator lubricating oil sled 17, the generator lubricating oil air cooler 18 and the generator oil-gas separator 19 are basically consistent with those of a gas engine lubricating oil system, and only work objects are different.
The control system monitors, controls, regulates and protects the unit all the time in the whole process of cold blowing, starting, running, loading, load shedding and dual fuel switching of the gas turbine and stopping. The method can realize main functions of unit starting/stopping sequence control, important parameter loop regulation, running state monitoring, fault stopping protection, early warning detection and the like, and can reasonably and effectively realize the whole process flow of grid-connected power generation.
The electric system mainly realizes the power supply, control, management and protection of electric equipment of the gas turbine generator set.
The fire gas system is used as an independent protection emergency system of the gas turbine generator set and mainly comprises two parts: a control system including sensors, indicators, and a CO 2 release sled 20. 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. The CO 2 release sled 20 is arranged outside the box 7 and connected by a pipeline, and releases CO 2 gas under the control of a fire system when a fire occurs.
In order to adapt to the supply installation conditions of offshore facilities and improve the applicability of the marine environment and the compactness of the arrangement space of the unit, the unit adopts a modularized design and an integration technology, and the whole set of gas turbine generator set is integrated into 7 prying bodies and a plurality of scattered supply devices.
During the production process in a factory, each pry body is independently produced and integrated, the assembly and the debugging of machinery, instruments and electric equipment required by a system are respectively completed, and a site installation interface is reserved; during the field installation, each pry body is independently installed and is fixedly connected in a welding mode, a bolt mode and the like, and pipelines and cables between pry bodies can be uniformly configured according to an installation interface reserved in a factory in the later period, so that the cross operation of various industrial and equipment can be conveniently carried out on site. Wherein, because of traffic limitation, only the gas turbine 1, the generator 2, the underframe 3 and the box 7 are arranged on the main machine pry in the transportation process, and other parts of the air intake and exhaust and ventilation system are individually packaged and transported and are arranged in place on site.
The beneficial effects of the invention are as follows:
1. The invention can realize the starting, running and fuel switching of the gas turbine under the use condition of liquid/gas two fuels.
2. The invention can meet the requirement of offshore oil and gas facilities such as offshore platforms and the like on the fuel adaptability of power supply equipment, and can be widely applied to offshore oil and gas facilities to realize domestic substitution.
3. The invention adopts modularized design and integration technology, and can meet the limitation and the requirement of the offshore platform on the unit arrangement and the size of the prying body.
Example 1:
As shown in fig. 1, a dual-fuel gas turbine generator set for an offshore facility comprises a main engine skid, an air intake, exhaust and ventilation system, a fuel system, an oil lubrication 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 a 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 inlet and outlet and ventilation system comprises an air inlet filter 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 ventilation fan 6 is integrally arranged in the air inlet filter chamber 4; the fuel system comprises a diesel skid 11, a natural gas skid 12 and a switching valve group 13; the diesel skid 11, the natural gas skid 12 and the switching valve group 13 are all installed by independent skid bodies for supplying goods, and each skid body is connected with the main engine skid body through a skid pipeline; the diesel skid 11 and the natural gas skid 12 carry out pre-treatment on the input fuel to enable the input fuel to meet the use requirement of the dual-fuel gas turbine 1, and simultaneously, the fuel flow is regulated according to the power requirement to complete metering feedback and complete fuel switching in cooperation with dual-fuel system equipment; the switching valve group 13 is used for re-managing the purge gas from the dual-fuel gas turbine 1 according to the control system setting and supplying the purge gas into 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 the form of a main engine sled as a whole. The dual-fuel gas turbine 1 and the generator 2 are assembled on a whole 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. Before the coupler is installed, the gesture of the generator and the gas turbine on the underframe 3 can be adjusted through tool tools such as jackscrews and the like so as to meet the centering requirements of the generator and the gas turbine. The box body 7 is arranged on the underframe 3, is fixedly connected with the underframe through bolts, and integrally seals 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, a diesel skid 11, a natural gas skid 12 and a switching valve group 13 are all 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 pretreated in the diesel skid 11 and the natural gas skid 12 through the inter-skid pipelines connected to the host skid and is supplied to the on-board dual-fuel system. The switching valve block 13, through the control valve block thereon, re-manages and supplies purge gas from the gas turbine 1 to the gas turbine dual fuel system equipment as set by the control system.
Example 2:
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 engine lubricating oil air cooler 15, the gas engine oil air separator 16, the generator lubricating oil skid 17, the generator lubricating oil air cooler 18 and the generator oil air separator 19 are all arranged in a way of supplying goods by independent skid bodies, and each skid body is connected with a main engine skid body through a skid pipeline; the gas turbine lubricating sled 14 supplies lubricating oil to each bearing component of the dual-fuel gas turbine 1, and returns to an oil tank after being cooled to the set temperature of a control system through the gas turbine lubricating oil air cooler 15 during oil return; the lubricating oil supplied to the front and rear bearings of the generator 2 by the generator lubricating oil sled 17 is firstly cooled to the set temperature of the control system by the generator lubricating oil air cooler 18 and then 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.
In the lubricating oil system, 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 are all arranged in a separate skid mode and are connected with a platform foundation in a welding or foundation bolt mode. Each skid body is connected with the host skid through a pipeline between the skids so as to realize the circulation of the lubricating oil medium. In the oil system of the gas turbine, oil returning of the gas turbine 1 reduces the temperature of the oil to the set temperature of the control system through the gas turbine air cooler 15 and returns to an oil tank; in the generator lubricating oil system, lubricating oil supplied from a generator lubricating oil tank is first passed through a cooler 18, the lubricating oil temperature is controlled at a control system set temperature, and then the lubricating oil is supplied to front and rear bearings of the generator 2.
Example 3:
In the air intake and exhaust and ventilation system, the air intake filter chamber 4 is provided with three stages of filters (a gas-water separation stage, an F7 stage filter and an E12 stage filter). The incoming airflow is split into combustion intake and ventilation intake. The ventilation air enters an air inlet silencer 8 and a channel under the action of a box ventilation fan 6 after passing through a gas-water separation stage and an F7 stage filter, finally flows into a box 7 to finish heat exchange, and is discharged out of the whole ventilation system through an air outlet silencer 9 and a channel part; the combustion intake air passes through the E12 filter in addition to the gas-water separation stage and the F7 filter, then passes through the intake silencer 5 and the passage and finally enters the gas turbine through-flow component. And the gas exhausted by the gas turbine is connected with the subsequent waste heat utilization equipment through an interface.
Example 4:
The control system, the electric system and the fire gas system connect the sensor, the actuator and the control elements on each prying device with the control, electric and fire gas disk cabinet through cables. The fire gas system is used as an independent protection emergency system of the unit, is provided with a CO 2 release sled 20 and is connected with the box body through a fire-fighting pipeline. When a fire occurs, under the cooperation of the fire system and the control system, the fire extinguishing agent (CO 2) in the CO 2 release sled 20 is released into the box body through the pipeline. Baffle valves 10 are arranged at the air inlet interface and the air outlet interface to realize the closing/opening requirements of the box body under different states. The rear end of the box body 7 is in the form of a detachable half moon wall plate, so that space is provided for the installation of the coupler.
Example 5:
The main machine prying body adopts a three-point supporting vibration isolation structure, so that the vibration interaction between a unit and facilities is reduced; the rear end of the box body 7 is in a detachable half moon wall plate form, and space is provided for the installation of the coupler. 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 commission state. Under the instruction of the control system, the lubricating oil system, the generator lubricating oil system, the air inlet and outlet system, the ventilation system and the fuel system of the gas turbine perform lubricating oil heating and circulation, a ventilation baffle valve is opened, and a valve is opened or closed according to the process design, so that the preparation and linkage check of the gas turbine before starting are completed.
The gas turbine may then be started and run steadily using either natural gas or fuel oil at the command of the control system. During operation of the unit, the attachable system provides necessary support for the unit under the supervision of the control system. When the dual fuel is switched, in the fuel system, the diesel skid and the natural gas skid are alternately put into use, and the switching valve group needs to switch the supply source of the purge gas. And finally, the dual-fuel is switched rapidly and stably.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A dual fuel gas turbine generator set for an offshore facility, characterized by: the engine comprises a main engine pry body, an air inlet and outlet and ventilation system, a fuel system, an lubricating 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 a 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 inlet and outlet and ventilation system comprises an air inlet filter 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 ventilation fan (6) is integrally arranged in the air inlet filter chamber (4); the fuel system comprises a diesel skid (11), a natural gas skid (12) and a switching valve group (13); the diesel engine skid (11), the natural gas skid (12) and the switching valve group (13) are all installed by independent skid bodies for supplying goods, and each skid body is connected with the main engine skid body through a skid pipeline; the diesel skid (11) and the natural gas skid (12) are used for pre-processing the input fuel to enable the input fuel to meet the use requirement of the dual-fuel gas turbine (1), and simultaneously, the fuel flow is regulated according to the power requirement to complete metering feedback and complete fuel switching in cooperation with dual-fuel system equipment; the switching valve group (13) is used for re-managing the purge gas from the dual-fuel gas turbine (1) according to the control system setting and supplying the purge gas into 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 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 fuel engine lubricating oil air cooler (15), the fuel engine oil-gas separator (16), the generator lubricating oil pry (17), the generator lubricating oil air cooler (18) and the generator oil-gas separator (19) are all arranged in a way of supplying goods by independent pry bodies, and each pry body is connected with the main engine pry body through a pry pipeline; the gas turbine lubricating sled (14) supplies lubricating oil to each bearing component of the dual-fuel gas turbine (1), and 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; the lubricating oil supplied to the front and rear bearings of the generator (2) by the generator lubricating oil sled (17) is firstly cooled to the set temperature of the control system by the generator lubricating oil air cooler (18) and then 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 lubricating oil;
The fire gas system comprises a baffle valve (10) and a CO 2 release 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); the CO 2 release sled (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 baffle valve (10) is closed, and the CO 2 release sled (20) releases CO 2 gas to the box body (7);
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 put-into-use state, and the gas turbine lubricating oil system, the generator lubricating oil system, the air inlet and outlet system, the ventilation system and the fuel system are subjected to lubricating oil heating and circulation, opening of a ventilation baffle valve and opening or closing of a valve according to process design under the instruction of the control system, so that preparation and linkage check before starting of the gas turbine are completed;
subsequently, under the instruction of the control system, the gas turbine can be started and stably operated by using any fuel of natural gas or fuel oil; during the running of the unit, the auxiliary system provides necessary support for the unit under the monitoring of the control system, when the dual-fuel switching is carried out, the diesel pry and the natural gas pry are alternately put into use in the fuel system, the supply source of the purge gas is required to be switched by the switching valve group, and finally, the dual-fuel switching is realized rapidly and stably.
2. A dual fuel gas turbine generator set for an offshore facility as claimed in claim 1, wherein: the air inlet filter chamber (4) is internally provided with a gas-water separation stage, an F7 stage filter and an E12 stage filter; after passing through the gas-water separation stage and the F7-stage filter, the ventilation air enters from a ventilation air inlet of the box body (7) through an air inlet silencer (8) and a first air inlet channel under the action of an air inlet filter chamber (4) and a ventilation fan (6); the combustion air enters from a combustion air inlet of the box body (7) through an air inlet silencer (5) and a second air inlet channel after sequentially passing through a gas-water separation stage, an F7 filter and an E12 filter; an exhaust silencer (9) is arranged at the exhaust outlet of the box body (7).
3. A dual fuel gas turbine generator set for an offshore facility as claimed in claim 2, wherein: the fire gas system is also included; the fire gas system comprises a baffle valve (10) and a CO 2 release 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); the CO 2 release sled (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 baffle valve (10) is closed, and the CO 2 release sled (20) releases CO 2 gas to the box (7).
4. A dual fuel gas turbine generator set for an offshore facility as claimed in claim 1, wherein: the main machine prying body adopts a three-point supporting vibration isolation structure, so that the vibration interaction between a machine set and facilities is reduced; the rear end of the box body (7) is in a detachable half moon wall plate form, so that space is provided for the installation of the coupler.
5. A dual fuel gas turbine generator set for an offshore facility as claimed in claim 2, wherein: the main machine prying body adopts a three-point supporting vibration isolation structure, so that the vibration interaction between a machine set and facilities is reduced; the rear end of the box body (7) is in a detachable half moon wall plate form, so that space is provided for the installation of the coupler.
6. A dual fuel gas turbine generator set for an offshore facility as claimed in claim 1, wherein: the main machine prying body adopts a three-point supporting vibration isolation structure, so that the vibration interaction between a machine set and facilities is reduced; the rear end of the box body (7) is in a detachable half moon wall plate form, so that space is provided for the installation of the coupler.
7. A dual fuel gas turbine generator set for 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 vibration interaction between a machine set and facilities is reduced; the rear end of the box body (7) is in a detachable half moon wall plate form, so that space is provided for the installation of the coupler.
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| US7950238B2 (en) * | 2006-10-26 | 2011-05-31 | General Electric Company | Method for detecting onset of uncontrolled fuel in a gas turbine combustor |
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| JP5566777B2 (en) * | 2010-05-26 | 2014-08-06 | 三菱重工業株式会社 | Fuel switching control mechanism for dual fuel gas turbine plant, gas turbine plant, and fuel switching control method for dual fuel gas turbine plant |
| US8600590B2 (en) * | 2012-03-15 | 2013-12-03 | Bright Energy Storage Technologies, Llp | Auxiliary power unit assembly and method of use |
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| ITFI20130297A1 (en) * | 2013-12-09 | 2015-06-10 | Nuovo Pignone Srl | "GAS TURBINE OFFSHORE INSTALLATIONS" |
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