Gas turbine power generation complete set for offshore platform

Abstract

The utility model discloses a complete gas turbine power generation unit for an offshore platform. The complete gas turbine power generation unit comprises a base supporting module and a main machine equipment module which is supported on the base supporting module and is arranged in an integrated modularization mode. The main engine equipment module is used for starting a gas turbine by using a starting unit in the main engine equipment module, so that the gas turbine combusts input fuel oil and combustion air to do work, and further supplies 2MW-level output electric energy to the offshore platform; the base supporting modules are dispersedly arranged on a platform frame of the offshore platform in a supported mode and used for elastic deformation vibration isolation and absorption, and then mutual transmission of vibration of the host equipment module and vibration of the platform frame is prevented. According to the utility model, the working intensity of field assembly personnel is low, the assembly efficiency and quality of the unit can be improved, the labor cost required by assembly is reduced, the modularized complete set problem of the gas turbine generator set is solved, the mutual transmission of the vibration of the host equipment module and the vibration of the platform frame is prevented, the use safety of the unit is prolonged, and the working reliability of the unit is improved; and stable operation of the unit on the platform is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbines, in particular to a gas turbine power generation complete set for an offshore platform. Background Art

[0002] At present, all 2MW power generators on offshore platforms use diesel generators, which have high operating costs, loud noise and vibration, and their operating stability and environmental performance are far inferior to gas turbines.

[0003] Due to the high safety and operation requirements of offshore platforms, the current research and development progress of domestic gas turbine products is relatively backward. The gas turbine generator sets officially used on offshore platforms are basically imported products above 2MW. The units occupy a large area, are expensive, have a long installation period, and have high operation and maintenance costs. At the same time, technical services are restricted by foreign countries. Due to the harsh environment of offshore platforms and inconvenient transportation, the operating reliability, stability, corrosion resistance, and noise of the units are required to be high. Domestic small gas turbine generator sets are all designed for land use, and their use environment is good. Generally, as long as the use function meets the requirements, it is sufficient; but to develop them into offshore platform products, it is necessary to optimize and improve the air intake system, electrical system, piping system, control system, etc., so that their selection, material, manufacturing process, corrosion resistance process, unit weight, vibration resistance, size, etc. meet the requirements of offshore environment use.

[0004] Due to the harsh environment of offshore platforms, in high temperature, high humidity, and high salt fog environments, strict requirements are placed on the size and weight, vibration resistance, and corrosion resistance of gas turbines and auxiliary equipment components. At the same time, all equipment used on offshore platforms must obtain classification society certification. The design requirements are high and the supervision and inspection process is complicated. There is no independently developed complete set of units in China that use 2MW gas turbines as power to drive generators for offshore platforms, so the application of domestic units of this power level in offshore platforms is still blank. Utility Model Content

[0005] The utility model provides a complete set of gas turbine power generation units for offshore platforms, which solves the technical problems of long installation period and large working vibration existing in existing domestic gas turbine power generation units when applied to offshore platforms.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A gas turbine power generation unit for an offshore platform comprises: a base support module, and a main equipment module supported on the base support module and integrated with modular arrangements; the main equipment module is used to start the gas turbine using the starter unit therein, so that the gas turbine burns input fuel and combustion air to perform work, thereby supplying 2MW-level output electrical energy to the offshore platform; the base support modules are dispersedly supported on the platform frame of the offshore platform to be used for elastic deformation vibration isolation and vibration absorption, thereby preventing the vibration of the main equipment module and the vibration of the platform frame from being transmitted to each other.

[0008] Furthermore, the base support module includes a first shock absorber, a second shock absorber and a third shock absorber; the first shock absorber is arranged below the gas turbine for elastic deformation in the vertical direction and in the axial direction extending from the gas turbine; the second shock absorber and the third shock absorber are arranged below the starting unit at intervals to form a triangular stable support with the first shock absorber, and the second shock absorber is elastically deformed in the vertical direction and in the lateral direction perpendicular to the axial direction, and the third shock absorber is fixedly arranged.

[0009] Furthermore, the first shock absorber includes an upper mounting seat connected to the host equipment module, a lower mounting seat connected to the platform frame, a main shock-absorbing spring group and two groups of axial shock-absorbing springs; the upper mounting seat and the lower mounting seat are connected in a vertically relative sliding manner; the main shock-absorbing spring group is arranged between the lower mounting seat and the upper mounting seat, and the upper mounting seat is elastically supported on the top of the main shock-absorbing spring group; the two groups of axial shock-absorbing springs are located between the upper mounting seat and the lower mounting seat, and are respectively arranged at both ends of the upper mounting seat and the lower mounting seat along the axial direction.

[0010] Furthermore, the bottom end of the upper mounting seat is concave to form a square upper cavity, and the top end of the lower mounting seat is concave to form a square upper cavity, and the lower mounting seat is inserted upward into the upper cavity; the main damping spring assembly is arranged in the lower cavity, and the top end extends out of the lower cavity to elastically support the upper mounting seat; two groups of axial damping springs are arranged at the axial ends of the lower mounting seat, and are located between the end face of the lower mounting seat and the corresponding inner wall of the upper cavity; the first shock absorber also includes multiple groups of guide bolts, and vertical damping springs mounted on each guide bolt; the multiple groups of guide bolts are vertically arranged in sequence along the periphery of the lower mounting seat, and the upper mounting seat is slidably mounted on the multiple groups of guide bolts up and down; the vertical damping spring is located between the upper mounting seat and the upper end nuts of the corresponding guide bolts.

[0011] Furthermore, the main equipment module also includes a base supported on the base support module, a main box body fixedly installed on the base, and an auxiliary support, a main support and an intake volute located in the main box body and supported on the base, as well as a coupling, a starting unit integrating a starting motor and a generator, an operation control device, and a generator lubricating oil system, a fuel engine lubricating oil system, a fuel system and an electrical control system connected to the operation control device; the gas turbine is axially supported on the auxiliary support and the main support respectively, and the intake end of the gas turbine is also connected to the intake volute and the coupling in turn, and its opposite exhaust end is connected to the exhaust silencer module located outside the main box body; the exhaust end of the intake system module extends into the main box body and is connected to the intake volute, and the box ventilation module is connected to the main box body; the starting unit and the operation control device are both located outside the main box body and supported on the base, and the coupling extends out of the main box body and is axially connected to the starting unit.

[0012] Furthermore, the starting unit also includes an installation cover arranged outside the starting motor and the generator, and an inner labyrinth seal, an outer labyrinth seal and a secondary seal; the starting motor is axially mounted on the non-drive shaft of the generator, and the drive shaft of the generator is axially penetrated through the side plate of the installation cover and then connected to the coupling; the inner labyrinth seal, the outer labyrinth seal and the secondary seal are axially mounted on the drive shaft of the generator in sequence from the inside to the outside, and are located between the installation shaft holes opened on the side plate of the installation cover; a sealed instrument air bleed cavity is also provided between the outer labyrinth seal and the secondary seal to introduce slightly positive pressure instrument air.

[0013] Furthermore, the gas turbine power generation unit for offshore platforms also includes an air intake system module, a box ventilation module, a lubricating oil cooling module, an exhaust silencer module and a fire extinguishing device module that are integrated and modularly arranged; the lubricating oil cooling module, the exhaust silencer module and the fire extinguishing device module are respectively supported on the platform frame, and the lubricating oil cooling module and the fire extinguishing device module are respectively arranged at both ends of the length direction of the main equipment module, and the exhaust silencer module is arranged close to the fire extinguishing device module; the air intake system module is connected to the air intake port of the main equipment module to provide dry and clean combustion air to the main equipment module, and the exhaust silencer module is connected to the exhaust port of the main equipment module to treat and discharge the exhaust gas generated by the combustion to the outside; the box ventilation module is used to filter the external cold air and input it into the main equipment module, and at the same time bring the stale air in the main equipment module out of the main equipment module, the lubricating oil cooling module is used to cool the lubricating oil input into the main equipment module, and the fire extinguishing device module is used to alarm when a fire occurs and extinguish the fire source automatically or manually.

[0014] Furthermore, the air intake system module includes an electric heating deicing device, an air intake filter device, an air intake elbow and an air intake muffler which are sequentially connected along the air intake direction; the exhaust end of the air intake muffler extends into the main chassis body and is connected to the air intake volute.

[0015] Furthermore, the box ventilation module includes an air intake system and an exhaust system respectively arranged at both ends of the gas turbine, and the air intake system is arranged close to the air intake system module, and the exhaust system is arranged close to the exhaust silencer module; the air intake system includes an air intake filter device, an air intake silencer, an air intake pipe, an air intake partition damper and a first pneumatic actuator, the air intake filter device, the air intake silencer and the air intake pipe are sequentially connected along the air intake direction, the air intake pipe is arranged from the outside to the inside through the top plate of the main box body, the air intake partition damper is arranged in the air intake pipe and connected to the first pneumatic actuator Actuator, the first pneumatic actuator is also connected to the operation control device; the exhaust system includes an exhaust duct, an exhaust partition damper, a second pneumatic actuator, an exhaust fan, an exhaust muffler and exhaust shutters, the exhaust duct, the exhaust fan and the exhaust muffler are connected in sequence along the exhaust direction, the exhaust duct is arranged from the inside to the outside through the top plate of the main chassis body, the exhaust partition damper is arranged in the exhaust duct and connected to the second pneumatic actuator, the second pneumatic actuator is also connected to the operation control device, and the exhaust shutters are arranged on the exhaust end of the exhaust muffler.

[0016] Furthermore, the lubricating oil cooling module includes a cooler base supported on the platform frame, an upper fin tube group and a lower fin tube group arranged in sequence up and down, and a cooling fan connected to one side of the upper fin tube group and the lower fin tube group; the generator lubricating oil inlet of the upper fin tube group is connected to the lubricating oil tank, the generator lubricating oil outlet of the upper fin tube group is connected to the generator, and the upper fin tube group is also provided with a generator lubricating oil drain outlet; the fuel engine lubricating oil inlet of the lower fin tube group is connected to the lubricating oil tank, the fuel engine lubricating oil outlet of the lower fin tube group is connected to the fuel engine, and the lower fin tube group is also provided with a fuel engine lubricating oil drain outlet.

[0017] The utility model has the following beneficial effects:

[0018] In the gas turbine power generation complete set for offshore platforms of the utility model, the main equipment module is integrated and modularized. The integrated modular design allows the unit to be operated by simply assembling the main equipment module and other equipment that interacts with the main equipment module on site during on-site installation. Since the more complicated work of the main equipment module has been completed during the modular integrated installation, the on-site installation workload is very small, the work intensity of the on-site assemblers is low, and the on-site work does not require highly skilled personnel to complete the installation, thereby improving the assembly efficiency and quality of the unit, reducing the manpower and material costs required for assembly, and solving the problem of modularization of gas turbine generator sets.

[0019] During operation, the installation method and environment of the offshore platform are quite different from those of the land-based civil engineering. The offshore platform is an all-steel structure and is located on the ocean. Affected by wind and waves, the platform is constantly displaced and deformed to varying degrees. If the generator set is rigidly fixed on the platform, the deformation and stiffness inconsistency will cause abnormal operation of the equipment or abnormal deformation. At the same time, the vibration of the unit will be directly transmitted to the platform, which may cause the platform vibration to exceed the standard. Therefore, when a large unit is installed on the platform, not only vibration reduction should be considered, but also the influence of the platform deformation on the operating part of the unit. Therefore, in the utility model, a base support module is arranged between the offshore platform and the main equipment module, and the elastic deformation of the base support module is used to isolate and absorb vibration. The elastic attenuation of the base support module is used to achieve the mutual non-influence between the vibration of the platform and the unit, thereby preventing the vibration of the main equipment module and the vibration of the platform frame from being transmitted to each other, extending the safety of the unit, improving the working reliability and stability of the unit, and ensuring the stable operation of the unit on the platform.

[0020] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of the main structure of a gas turbine power generation unit in a preferred embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the spatial structure of a gas turbine power generation unit in a preferred embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the structure of the generator integrated starter motor;

[0025] Figure 4 This is a schematic diagram of the generator oil leakage prevention structure;

[0026] Figure 5 It is a schematic diagram of the auxiliary support of the gas turbine;

[0027] Figure 6 It is a schematic diagram of the partial structure of the air intake system module;

[0028] Figure 7 is a schematic diagram of the spatial structure of the lubricating oil cooling module;

[0029] Figure 8 is a schematic diagram of the structure of the base support module viewed from above;

[0030] Fig. 9 is a schematic diagram of a cross-sectional structure of a first shock absorber;

[0031] Fig.10 yes Fig. 9 BB-direction cross-sectional structural diagram;

[0032] Fig.11 It is a schematic diagram of the exhaust ejection structure of a gas turbine;

[0033] Fig.12 It is the schematic diagram of the fire extinguishing device module;

[0034] Fig.13 This is a schematic diagram of the hoisting position of the host equipment module.

[0035] Legend

[0036] 10. Main equipment module; 11. Gas turbine; 12. Base; 13. Main box body; 14. Auxiliary support; 15. Main support; 16. Inlet volute; 17. Coupling; 18. Starting unit; 181. Starting motor; 182. Generator; 183. Mounting cover; 1830. Instrument air intake cavity; 184. Inner labyrinth seal; 185. Outer labyrinth seal; 186. Secondary seal; 19. Operation control device; 21. Generator Lubricating oil system; 22. Engine lubricating oil system; 23. Fuel system; 24. Electrical control system; 25. Lifting lug; 26. Lifting belt baffle; 27. Lifting belt hole; 28. Bolt; 30. Air intake system module; 31. Electric heating deicing device; 32. Air intake filter device; 33. Air intake elbow; 34. Air intake silencer; 40. Box ventilation module; 41. Air intake filter device; 42. Air intake silencer; 43. Air intake partition damper; 44. First pneumatic actuator ; 45. Second pneumatic actuator; 46. Exhaust fan; 47. Exhaust muffler; 48. Exhaust shutters; 50. Lubricating oil cooling module; 51. Cooler base; 52. Upper finned tube group; 521. Generator lubricating oil inlet; 522. Generator lubricating oil outlet; 523. Generator lubricating oil drain outlet; 53. Lower finned tube group; 531. Engine lubricating oil inlet; 532. Engine lubricating oil outlet; 533. Engine lubricating oil drain outlet; 54. Cooling fan; 60. Exhaust silencer module; 601, ejector ring; 61, exhaust connecting pipe; 62, exhaust expansion joint; 63, exhaust base; 64, exhaust silencer; 70, base support module; 71, first shock absorber; 711, upper mounting seat; 712, lower mounting seat; 713, guide bolt; 714, main shock absorber spring group; 715, axial shock absorber spring; 716, vertical shock absorber spring; 72, second shock absorber; 73, third shock absorber; 80, fire extinguishing device module. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0038] Reference Figure 1-2 The preferred embodiment of the utility model provides a complete set of gas turbine power generation units for offshore platforms, including: a base support module 70, and a main equipment module 10 supported on the base support module 70 and integrated with modular settings; the main equipment module 10 is used to start the gas turbine 11 using the starting unit 18 therein, so that the gas turbine 11 burns the input fuel and combustion air to perform work, and then supplies 2MW output power to the offshore platform; the base support modules 70 are dispersedly supported on the platform frame of the offshore platform to be used for elastic deformation vibration isolation and vibration absorption, thereby preventing the vibration of the main equipment module 10 and the vibration of the platform frame from being transmitted to each other.

[0039] In the gas turbine power generation complete set for offshore platforms of the utility model, the main equipment module 10 is integrated and modularized. The integrated modular design allows the unit to be operated by simply assembling the main equipment module 10 and other equipment that interacts with the main equipment module 10 on site during on-site installation. Since the more complicated work of the main equipment module 10 has been completed during the modular integrated installation, the on-site installation workload is very small, the work intensity of the on-site assemblers is low, and the on-site work does not require highly skilled personnel to complete the installation, thereby improving the assembly efficiency and quality of the unit, reducing the manpower and material costs required for assembly, and solving the problem of modularization of gas turbine generator sets.

[0040] During operation, the installation method and environment of the offshore platform are quite different from those of the land construction. The offshore platform is an all-steel structure and is located on the ocean. Affected by wind and waves, the platform is constantly displaced and deformed to varying degrees. If the generator set is rigidly fixed on the platform, the deformation and stiffness inconsistency will cause abnormal operation of the equipment or abnormal deformation. At the same time, the vibration of the unit will be directly transmitted to the platform, which may cause the platform vibration to exceed the standard. Therefore, when a large unit is installed on the platform, it is necessary to consider not only vibration reduction, but also the influence of the platform deformation on the operating part of the unit. Therefore, in the utility model, a base support module 70 is arranged between the offshore platform and the main equipment module 10, and the elastic deformation of the base support module 70 is used to isolate and absorb vibration. The elastic attenuation of the base support module 70 is used to achieve the mutual non-influence of the vibration of the platform and the unit, thereby preventing the mutual transmission of the vibration of the main equipment module 10 and the vibration of the platform frame, thereby extending the safety of the unit, improving the working reliability and stability of the unit, and ensuring the stable operation of the unit on the platform.

[0041] Alternatively, if Figure 8As shown, the base support module 70 includes a first vibration damper 71, a second vibration damper 72 and a third vibration damper 73; the first vibration damper 71 is arranged below the gas turbine 11 to be elastically deformed in the vertical direction and in the axial direction of the gas turbine 11; the second vibration damper 72 and the third vibration damper 73 are arranged below the starting unit 18 at intervals to form a triangular stable support with the first vibration damper 71, and the second vibration damper 72 is elastically deformed in the vertical direction and in the lateral direction perpendicular to the axial direction, and the third vibration damper 73 is fixedly arranged. Specifically, as shown in FIG. Figure 8 As shown, the lateral position of the support point A (the first shock absorber 71) is fixed, and the axial position is a deformable guide; the support point B (the third shock absorber 73) is fixed in both the lateral and axial positions, or is a slightly deformable guide; the lateral position of the support point C (the second shock absorber 72) is a deformable guide, and the axial position is fixed. This arrangement can ensure the stable operation of the unit on the platform, while absorbing the displacement deformation of the platform in the axial and lateral directions to absorb and isolate vibrations.

[0042] In this option, if Figure 9-10 As shown, the first shock absorber 71 includes an upper mounting seat 711 connected to the host device module 10, a lower mounting seat 712 connected to the platform frame, a main shock-absorbing spring group 714 and two groups of axial shock-absorbing springs 715; the upper mounting seat 711 and the lower mounting seat 712 are connected in a vertically relatively sliding manner; the main shock-absorbing spring group 714 is arranged between the lower mounting seat 712 and the upper mounting seat 711, and the upper mounting seat 711 is elastically supported on the top of the main shock-absorbing spring group 714. Through the deformation of the main shock-absorbing spring group 714 in the vertical direction, the host device module 10 can be prevented from transmitting vibration to the lower mounting seat 712 through the upper mounting seat 711, and then to the offshore platform. Similarly, the vibration of the offshore platform can also be prevented from being transmitted to the upper mounting seat 711 through the lower mounting seat 712, and then to the host device module 10. The two groups of axial damping springs 715 are located between the upper mounting seat 711 and the lower mounting seat 712, and are arranged at both ends of the two along the axial direction, which not only allows the first damper 71 to deform along the axial direction, but also prevents the vibration of the upper mounting seat 711 from being transmitted axially to the lower mounting seat 712. Figure 8 As shown, the structure of the second shock absorber 72 is the same as that of the first shock absorber 71. During installation, the second shock absorber 72 only needs to be perpendicular to the first shock absorber 71, and the structure of the third shock absorber 73 is also the same as that of the first shock absorber 71, except that the main shock absorber spring group 714, the axial shock absorber spring 715 and the vertical shock absorber spring 716 are springs with a small deformation range so that the support point B is fixed or can only be slightly deformed and adjusted.

[0043] Furthermore, if Figure 9-10As shown, the bottom end of the upper mounting seat 711 is concave to form a square upper cavity, the top end of the lower mounting seat 712 is concave to form a square upper cavity, and the lower mounting seat 712 is inserted upward into the upper cavity. In this optional scheme, the upper mounting seat 711 includes an upper mounting plate, upper connecting screws fixed on the upper mounting plate, and four upper mounting blocks fixed on the lower surface of the upper mounting plate for enclosing the upper cavity; the upper connecting screws are fixed to the host device module 10; the structural setting of the lower mounting seat 712 is the same as that of the upper mounting seat 711, which will not be repeated here. The main damping spring group 714 is installed in the lower cavity, and the top end extends out of the lower cavity to elastically support the upper mounting seat 711; two groups of axial damping springs 715 are respectively arranged at the axial ends of the lower mounting seat 712, and are located between the end face of the lower mounting seat 712 and the corresponding inner wall of the upper cavity.

[0044] Furthermore, if Fig. 9 As shown, the first shock absorber 71 also includes multiple groups of guide bolts 713 and vertical shock-absorbing springs 716 mounted on each guide bolt 713; the multiple groups of guide bolts 713 are vertically arranged in sequence along the periphery of the lower mounting seat 712, and the upper mounting seat 711 is slidably mounted on the multiple groups of guide bolts 713 up and down. Through the arrangement of the multiple groups of guide bolts 713, the vertical sliding of the upper mounting seat 711 is guided, thereby improving the movement accuracy of the first shock absorber 71. The vertical shock-absorbing spring 716 is located between the upper mounting seat 711 and the upper end nut of the corresponding guide bolt 713, and the vertical shock-absorbing spring 716 is used to prevent the host equipment module 10 from affecting the offshore platform when it moves upward. In the specific embodiment of this optional scheme, the main shock-absorbing spring group 714, the axial shock-absorbing spring 715 and the vertical shock-absorbing spring 716 are all wire springs.

[0045] Optionally, the main engine blades of the gas turbine 11 are sprayed with an anti-corrosion coating resistant to marine environment corrosion; in order to adapt to the operation of offshore platforms, the main engine blades of the gas turbine are optimized and improved, and good marine environment corrosion resistance is achieved by adding anti-corrosion coatings. All carbon steel fasteners of the gas turbine power generation unit are treated with zinc infiltration and surface spraying. Zinc treatment is used to ensure that the salt spray corrosion resistance is greater than 1000 hours; when the surface is sprayed with paint, a special sandblasting process instruction book is first formulated to specify the ambient temperature and humidity conditions of the sandblasting process, the flow rate and pressure of compressed air during sandblasting, and to ensure the sandblasting effect of the carbon steel parts. At the same time, during the sandblasting process, special protective tooling is used to protect the installation surfaces, flange surfaces and other interfaces to prevent the mating surfaces from being damaged, and the rust removal surface grade and cleanliness are strictly inspected; a special spraying process instruction book is formulated for spraying paint, which specifies that the paint brand is PPG, the primer is high-solid epoxy paint, the thickness is 70μm, the intermediate paint is epoxy paint, the thickness is 200μm, the topcoat is polyurethane, the thickness is 60μm, and the spraying requires a clean and hygienic workplace. The optimal spraying temperature is 20℃~30℃. The spraying process is clearly specified. In order to ensure the spraying quality, there are clear inspection requirements for the appearance, missing points, coating thickness, cleanliness and adhesion of the coating. In addition, all external materials of the gas turbine power generation unit are made of 316L material.

[0046] Alternatively, if Figure 1-2 As shown, the main equipment module 10 also includes a base 12 supported on the base support module 70, a main box body 13 fixedly mounted on the base 12, and an auxiliary support 14, a main support 15 and an intake volute 16 located in the main box body 13 and supported on the base 12, and a coupling 17, a starter unit 18 integrating a starter motor 181 and a generator 182, an operation control device 19, and a generator lubricating oil system 21, a combustion engine lubricating oil system 22, a fuel system 23 and an electrical control system 24 connected to the operation control device 19. The gas turbine 11 is supported on the auxiliary support 14 and the main support 15 in the axial direction, and the intake end of the gas turbine 11 is also connected to the intake volute 16 and the coupling 17 in sequence, and its opposite exhaust end is connected to the exhaust muffler module 60 located outside the main box body 13. The exhaust end of the air intake system module 30 extends into the main chassis 13 and is connected to the air intake volute 16, and the chassis ventilation module 40 is connected to the main chassis 13. The starting unit 18 and the operation control device 19 are both located outside the main chassis 13 and supported on the base 12, and the coupling 17 extends out of the main chassis 13 and is connected to the starting unit 18 along the axial direction.

[0047] When the gas turbine power generation unit for offshore platform of the utility model is working, the motor 181 is first started to start the gas turbine 11. When the gas turbine 11 rotates, the compressor sucks the clean combustion air filtered by the intake system module 30 into the compressor for compression and pressure increase, and then mixes and burns with the fuel from the fuel system 23 in the combustion chamber to generate high-temperature and high-pressure combustion gas, which drives the power turbine to rotate at high speed; at the same time, the power turbine drives the gas turbine compressor rotor to rotate to ensure the continuous supply of air and maintain the normal operation of the gas turbine; the power turbine rotates at high speed and outputs in the form of shaft power, and after being decelerated by the planetary reducer built into the combustion engine, it drives the generator 182 to rotate through the output shaft and the coupling 17, and the generator 182 converts mechanical energy into electrical energy through a series of electromechanical devices; when the gas turbine 11 is successfully started, the gas turbine 11 is maintained in operation by the power generated by itself; the exhaust gas (flue gas) is discharged from the exhaust silencer module 60 to the exhaust silencer therein, and the exhaust gas of the combustion engine can also be recovered by installing a waste heat boiler or other waste heat recovery equipment.

[0048] The main equipment module 10 of the utility model integrates the gas turbine 11, the generator 182 and the auxiliary systems such as lubricating oil, fuel and electricity. Since the gas turbine 11 and the generator 182 are integrated on the main equipment module 10, the structure is compact and beautiful, and the size of the base 12 is controlled at 7.8 meters (length) * 2.4 meters (width); on the other hand, due to the integrated setting of the main equipment module 10, it can be assembled and debugged in the factory and then shipped to the site as a whole. On site, only the remaining auxiliary modules need to be fastened and installed by bolts. There is no special installation requirement. The on-site installation work is simple, which greatly reduces the on-site workload, shortens the installation period and the labor intensity of personnel; in addition, the reducer device is integrated in the gas turbine 11, and the gas turbine can directly drive the generator 182 to work. Since the installation of the reducer device is reduced, the size and weight of the unit can be reduced, and the workload of the whole set is reduced, and the workload of centering and positioning is greatly reduced.

[0049] In this option, if Figure 1-2As shown, the main engine box body 13 is a frame-type silencer structure, which is integrally installed on the base 12 and connected by bolts and sealing gaskets; a lighting system is also provided in the main engine box body 13 to ensure visual maintenance 24 hours a day; the main engine box body 13 adopts a structure that combines silencer and sound insulation to ensure that the noise is controlled below 85dBA. The main engine box body 13 is provided with a 1.5t hanging beam and an extended hanging beam arm just above the center of gravity of the gas turbine 11, which can facilitate the gas turbine 11 to be lifted in and out of the box for installation and maintenance. In addition, steel wire reinforced double-layer tempered vacuum glass observation windows are provided on both sides of the main engine box body 13, so that the internal operating status of the unit can be inspected without opening the cabin door when the unit is running. Maintenance inspection doors are also provided on both sides of the box body for daily maintenance operations. The generator 182 is arranged on the base 12. An operation control device 19 is also provided at the rear of the main equipment. The control panel of the operation control device 19 has a rain cover. A local control box is arranged at the rain cover. The local control box realizes functions such as local display of main operating parameters of the unit, status indication and local emergency shutdown of the unit.

[0050] Optionally, the starting unit 18 further includes an installation cover 183 disposed outside the starting motor 181 and the generator 182, an inner labyrinth seal 184, an outer labyrinth seal 185 and a secondary seal 186. Figure 3 As shown, the starter motor 181 is axially installed on the non-drive shaft of the generator 182, and the drive shaft of the generator 182 is axially penetrated through the side plate of the mounting cover 183 and then connected to the coupling 17; in this structure, the starting unit 18 is integrated, the generator 182 rotates at 1000r / min, 50HZ, and the 60kW starter motor 181, exciter, etc. are integrated into the generator 182. When the unit is started, the generator rotor is driven to rotate by the starter motor 181, and the gas turbine compressor rotor is driven to rotate by the coupling 17, thereby starting the unit. This structure reduces the external installation of the starter motor 181, thereby reducing the space and weight required for installation, and at the same time reducing the amount of on-site construction.

[0051] Furthermore, if Figure 4As shown, the inner labyrinth seal 184, the outer labyrinth seal 185 and the secondary seal 186 are sequentially installed on the drive shaft of the generator 182 from the inside to the outside along the axial direction, and are located between the mounting shaft holes opened on the side plate of the mounting cover 183. A sealed instrument air bleed cavity 1830 is also provided between the outer labyrinth seal 185 and the secondary seal 186 to introduce slightly positive pressure instrument air. In this optional scheme, since the unit adopts a negative pressure ventilation structure installed in the outer cover, and in order to reduce noise, the coupling 17 adopts a sealed type, and the negative pressure of the installed outer cover 183 is connected to the generator shaft end. When the unit is running, the negative pressure of the installed outer cover will cause oil leakage at the generator shaft seal. Therefore, the motor of the utility model adopts a labyrinth shaft seal at the shaft end, that is, the inner labyrinth seal 184 and the outer labyrinth seal 185 cooperate to seal, and at the same time, a secondary seal is added on the outside, that is, a secondary seal 186 is added to seal, and a separate instrument air bleed cavity 1830 is also set between the two seals. By introducing a slightly positive pressure instrument air to isolate the generator bearing end and the negative pressure of the outer cover, oil leakage of the shaft seal is avoided, and the problem of negative pressure exhaust oil leakage of the generator is solved.

[0052] Alternatively, if Figure 1 As shown, the main support 15 is fixedly supported on the base 12, and the gas turbine 11 is fixedly connected to the main support 15. Figure 5 As shown, the auxiliary support 14 includes two groups arranged on both sides of the gas turbine 11. The upper and lower ends of the two groups of auxiliary supports 14 are connected to the corresponding gas turbine 11 and base 12 through spherical bearings. When working, the auxiliary support 14 and the main support 15 cooperate to bear the weight of the main body of the gas turbine 11, while taking into account the adjustment of the center of the gas turbine and absorbing the dimensional deviation after the thermal expansion of the gas turbine. The main support 15 is a fixed support to ensure that the position of the gas turbine output flange remains unchanged and that the gas turbine and the generator shaft are concentric and the distance remains unchanged during operation; the auxiliary support 14 adopts a triangular support, such as Figure 5 As shown, the stability of the structure is ensured. At the same time, joint bearings are used on the upper and lower parts, which allows the engine to move freely in the axial direction. This design can ensure the absorption of thermal expansion during the operation of the engine.

[0053] Alternatively, if Figure 1As shown, the host equipment module 10 also includes a lubricating oil tank and a tank level gauge. The main part of the lubricating oil tank is integrated in the base 12, and its oil inlet extends out of the base 12. The tank level gauge also extends out of the base 12. The lubricating oil tank inlet and lubricating oil tank level gauge provided therein can add lubricating oil to the tank and check the lubricating oil tank level without opening the cabin door of the unit. The supporting pipelines and electrical cables of the host equipment module 10 are also respectively integrated in the base 12, and the supporting pipelines and electrical cables are arranged in layers up and down. In this optional scheme, the base 12 is welded with H-shaped steel and steel plates, and is the main load-bearing component of the unit. All equipment is directly or indirectly fixed to the base 12 by bolt connection. The lower mounting plate of the base 12 can be fixed by civil engineering grouting or welding using a multi-point mounting plate, or it can be connected to the base support module 70 by bolts to form a three-point vibration isolation support type for installation. The supporting pipelines and electrical cables of the unit are arranged in the base 12 in a layered arrangement. The pipelines and electrical cables are arranged reasonably without interfering with each other, which is convenient for maintenance and overhaul.

[0054] Alternatively, if Figure 1-2 As shown, the gas turbine power generation unit for offshore platforms also includes an air intake system module 30, a box ventilation module 40, a lubricating oil cooling module 50, an exhaust silencer module 60 and a fire extinguishing device module 80, which are integrated and modularly arranged. The lubricating oil cooling module 50, the exhaust silencer module 60 and the fire extinguishing device module 80 are respectively supported on the platform frame, and the lubricating oil cooling module 50 and the fire extinguishing device module 80 are respectively arranged at both ends of the length direction of the main equipment module 10, and the exhaust silencer module 60 is arranged close to the fire extinguishing device module 80. The air intake system module 30 is connected to the air intake of the main equipment module 10 to provide dry and clean combustion air to the main equipment module 10, and the exhaust silencer module 60 is connected to the exhaust port of the main equipment module 10 to treat the exhaust gas generated by combustion and discharge it to the outside. The box ventilation module 40 is used to filter the external cold air and input it into the host equipment module 10, and at the same time bring the stale air in the host equipment module 10 out of the host equipment module 10. The lubricating oil cooling module 50 is used to cool the lubricating oil input into the host equipment module 10. The fire extinguishing device module 80 is used to alarm when a fire occurs and extinguish the fire source automatically or manually.

[0055] The utility model is a complete set of gas turbine power generation units for offshore platforms, and its components are divided into 7 integrated modules, namely, a main equipment module 10, an air intake system module 30, a box ventilation module 40, a lubricating oil cooling module 50, an exhaust silencer module 60, a base support module 70 and a fire extinguishing device module 80. The integrated modular design allows the unit to be operated by simply assembling the integrated modules on site during on-site installation. Moreover, since the more complicated work of each module has been completed during the modular integrated installation, the workload of on-site installation between the modules is also very small, and the on-site work does not require highly skilled personnel to complete the installation. The utility model can greatly reduce the on-site construction workload of various equipment during on-site construction and installation, improve assembly efficiency and unit assembly quality, solve the problem of modularization of 2MW gas turbine generator sets, and greatly reduce the work intensity of on-site assembly personnel; on the other hand, modular design requires the reasonable optimization and integration of relevant system equipment management and electrical equipment on a skid, which can effectively ensure installation and maintenance space while meeting the functional requirements. The gas turbine power generation unit for offshore platforms of the utility model has a compact structure and a reasonable layout of each module, thereby reducing the overall size of the unit, making it more suitable for occasions with limited installation space such as offshore platforms.

[0056] Alternatively, if Figure 2 and Figure 6 As shown, the air intake system module 30 includes an electric heating deicing device 31, an air intake filter device 32, an air intake elbow 33 and an air intake muffler 34 which are sequentially connected along the air intake direction. The exhaust end of the air intake muffler 34 extends into the main chassis body 13 and is connected to the air intake volute 16. In this optional solution, the air intake filter device 32 is made of 316L stainless steel, which enhances the air intake filtering, desalting and dehumidifying functions. At the same time, in order to be able to be used in a low temperature environment, an electric heating deicing device 31 is provided at the air inlet of the air intake filter device 32. When working, the design pressure loss of the air intake system module 30 is not more than 1050Pa, and the operating shutdown value is 1800Pa. The temperature drop caused by this extreme condition is calculated to be within 2°C. The electric heating deicing device 31 is used to increase the air intake temperature by 5°C to ensure that the air intake temperature will not be lower than the current dew point temperature under any conditions, and frost will not be formed. The start and stop of the heater of the electric heating deicing device 31 is automatically controlled by a dedicated controller according to the ambient temperature. When the unit is running and the ambient temperature is lower than 5°C and the temperature difference before and after the heater is less than 5°C, the heater is turned on; when the temperature difference before and after the heater is greater than 7°C, or the ambient temperature is greater than 7°C when the unit is running, or the unit stops running, or the temperature behind the heater is greater than 60°C, the heater is stopped. At the same time, when the temperature difference before and after the heater is still less than 5°C after 5 minutes of starting, the electric heating deicing device 31 sends an icing danger alarm signal to the unit control system.

[0057] Alternatively, if Figure 1 and Figure 2As shown, the box ventilation module 40 includes an air intake system and an exhaust system respectively arranged at both ends of the gas turbine 11, and the air intake system is arranged near the air intake system module 30, and the exhaust system is arranged near the exhaust silencer module 60. When working, the external cold air enters the main box body 13 after being filtered by the air intake system, flows through the entire box body to take away the heat, and then is discharged into the atmosphere through the exhaust system. The air intake system includes an air intake filter device 41, an air intake muffler 42, an air intake pipe, an air intake partition damper 43 and a first pneumatic actuator 44. The air intake filter device 41, the air intake muffler 42 and the air intake pipe are connected in sequence along the air intake direction. The air intake pipe is arranged from the outside to the inside through the top plate of the main box body 13. The air intake partition damper 43 is arranged in the air intake pipe and connected to the first pneumatic actuator 44. The first pneumatic actuator 44 is also connected to the operation control device 19. The exhaust system includes an exhaust duct, an exhaust partition damper, a second pneumatic actuator 45, an exhaust fan 46, an exhaust muffler 47 and an exhaust louver 48. The exhaust duct, the exhaust fan 46 and the exhaust muffler 47 are connected in sequence along the exhaust direction. The exhaust duct is arranged from the inside to the outside through the top plate of the main chassis body 13. The exhaust partition damper is arranged in the exhaust duct and connected to the second pneumatic actuator 45. The second pneumatic actuator 45 is also connected to the operation control device 19. The exhaust louver 48 is arranged on the exhaust end of the exhaust muffler 47. In this optional scheme, by arranging corresponding air inlet partition dampers 43 and exhaust partition dampers at the inlet and outlet, in emergency situations, such as internal fire, natural gas leakage, unit power outage, gas outage and other sudden situations, the dampers can be automatically closed to isolate the internal and external spaces of the unit to prevent internal flammable gases from leaking or external flammable gases from entering the unit. At the same time, the concentration of fire extinguishing agent inside the box can be maintained in case of fire.

[0058] Alternatively, if Figure 7 As shown, the lubricating oil cooling module 50 includes a cooler base 51 supported on a platform frame, an upper fin tube group 52 and a lower fin tube group 53 arranged in sequence from top to bottom, and a cooling fan 54 connected to one side of the upper fin tube group 52 and the lower fin tube group 53. The generator lubricating oil inlet 521 of the upper fin tube group 52 is connected to the lubricating oil tank, the generator lubricating oil outlet 522 of the upper fin tube group 52 is connected to the generator 182, and the upper fin tube group 52 is also provided with a generator lubricating oil drain outlet 523. The engine lubricating oil inlet 531 of the lower fin tube group 53 is connected to the lubricating oil tank, the engine lubricating oil outlet 532 of the lower fin tube group 53 is connected to the engine, and the engine lubricating oil drain outlet 533 is also provided on the lower fin tube group 53. In this optional solution, the lubricating oil cooling module 50 integrates the cooling of the engine and generator lubricating oil. The upper part is the generator lubricating oil cooling part, and the lower part is the engine lubricating oil cooling part. The overall structure is compact, easy to install, and requires a small area. The lubricating oil cooling module 50 is a tube-fin structure. The high-temperature lubricating oil flows from left to right through the fin tubes. The cooling fan 54 draws cold air into the fin tubes to take away the heat from the pipeline and cool the lubricating oil.

[0059] Alternatively, if Fig.12 As shown, the fire extinguishing device module 80 includes a fire extinguishing agent storage bottle group, a pneumatic bottle head valve, a one-way valve, an isolation ball valve, a pressure monitoring device, an electromagnetic bottle head valve and other equipment. The module has three functions of starting the fire extinguishing agent for fire extinguishing: automatic, manual and emergency operation.

[0060] Automatic control: When the unit is operating normally, the switch in the gas fire extinguishing control panel is set to the "automatic" position, and the fire extinguishing system is in automatic control. When the two flame detectors detect fire signals at the same time, the fire extinguishing system will be automatically activated after a delay of 30 seconds to extinguish the fire; if the temperature detected by the temperature detector exceeds 167℃, an alarm signal will also be issued to automatically activate the fire extinguishing system.

[0061] Manual control: When someone is working or on duty in the protection area, the switch in the gas fire extinguishing control panel is placed in the "manual" position, and the fire extinguishing system is in manual control. When a fire occurs in the protection area, the manual alarm button on the on-site control panel can be pressed to start the fire extinguishing system and implement fire extinguishing. Before manual control is implemented, all personnel in the protection area must be evacuated.

[0062] When a fire alarm occurs, if it is found that there is no need to start the fire extinguishing system to extinguish the fire within the 30s delay time, the emergency stop button at the door of the main chassis 13 can be pressed to prevent the issuance of the fire extinguishing command and stop the system fire extinguishing program.

[0063] Emergency operation: When the fire control system fails and a fire occurs, the operator can go to the bottle storage cabinet to open the emergency operation device and start the system to extinguish the fire. When a flame detector in the fire alarm system detects a fire signal, the fire controller sends an alarm signal. When two flame detectors detect a fire signal at the same time or the manual alarm button is pressed, the automatic fire extinguishing system is started. At this time, the air inlet partition damper and the exhaust partition damper driven by the instrument wind are closed at the same time, the sound and light alarm sends a sound and light signal, and the ventilation fan stops running; after a delay of 30s, the solenoid valve on the CO2 fire extinguishing bottle group is automatically opened, and the CO2 in the storage bottle is sprayed out through the pipeline and the nozzle, thereby automatically extinguishing the fire.

[0064] Alternatively, if Figure 2 As shown, the exhaust muffler module 60 includes an exhaust connecting pipe 61, an exhaust expansion joint 62, an exhaust base 63 and an exhaust muffler 64 which are sequentially connected along the exhaust direction. Fig.11As shown, the exhaust connecting pipe 61 is arranged through the side wall of the main engine case body 13, and the air inlet end of the exhaust connecting pipe 61 extends to the gap and is sleeved outside the exhaust end of the gas turbine 11 to form an annular injection ring port 601 between the exhaust end of the gas turbine 11; when the unit is running, a large amount of airflow is discharged from the engine, and a negative pressure is formed at the injection ring port 601, and the air inside the unit case is drawn away by the exhaust airflow of the engine through the negative pressure, so that this exhaust structure can ensure that during the operation of the engine, the thermal expansion of the engine and the exhaust connecting pipe 61 does not affect each other, and at the same time, the exhaust connecting pipe will not generate thrust on the engine due to thermal expansion, thereby affecting the operation of the engine, and can also reduce expansion joints, with a simple and economical structure, reducing installation accuracy and workload, and at the same time, the injection effect of the exhaust gas flow can take away the air inside the main engine case body 13, increase the air circulation inside the case body, and enhance the ventilation and cooling effect inside the case body. The exhaust base 63 is supported on the platform frame to vertically input the exhaust gas input by the exhaust expansion joint 62 into the exhaust muffler 64. The exhaust base 63 is internally provided with a guide structure to divert the axial airflow to the radial direction and discharge it to the exhaust muffler 64. The exhaust gas after passing through the exhaust muffler 64 can be directly discharged through the chimney. The main function of the exhaust muffler module 60 is to lead the high-temperature exhaust gas generated when the engine is running out of the main chassis body 13, to prevent the thermal displacement of the exhaust flue from exerting force on the engine, and to reduce the exhaust noise of the unit.

[0065] Alternatively, if Fig.13 As shown, when the host equipment module is hoisted, a sling baffle 26 is added at the lifting ear 25, and the sling baffle 26 is penetrated by bolts 28 and connected to the host equipment module. When hoisting, the sling is in the formed closed cavity, i.e., the sling hole 27, which can effectively prevent the sling from falling off due to the influence of wind and waves during offshore hoisting operations.

[0066] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A gas turbine power generation unit for an offshore platform, characterized in that: include: A base support module (70), and a host device module (10) supported on the base support module (70) and integrated with a modular arrangement; The main equipment module (10) is used to start the gas turbine (11) by using the starter unit (18) therein, so that the gas turbine (11) burns the input fuel and combustion air to produce work, thereby supplying 2MW-level output electrical energy to the offshore platform; The base support modules (70) are dispersedly supported on the platform frame of the offshore platform to be used for elastic deformation vibration isolation and vibration absorption, thereby preventing the vibration of the host equipment module (10) and the vibration of the platform frame from being transmitted to each other; The base support module (70) comprises a first vibration damper (71), a second vibration damper (72) and a third vibration damper (73); the first vibration damper (71) is arranged below the gas turbine (11) to be elastically deformed in the vertical direction and in the axial direction extending from the gas turbine (11); the second vibration damper (72) and the third vibration damper (73) are arranged below the starting unit (18) at intervals to form a triangular stable support with the first vibration damper (71), and the second vibration damper (72) is elastically deformed in the vertical direction and in the lateral direction perpendicular to the axial direction, and the third vibration damper (73) is fixedly arranged; The first damper (71) comprises an upper mounting seat (711) connected to the host device module (10), a lower mounting seat (712) connected to the platform frame, a main damping spring group (714) and two groups of axial damping springs (715); the upper mounting seat (711) and the lower mounting seat (712) are connected in a vertically relative sliding manner; the main damping spring group (714) is arranged between the lower mounting seat (712) and the upper mounting seat (711), and the upper mounting seat (711) is elastically supported on the top of the main damping spring group (714); the two groups of axial damping springs (715) are located between the upper mounting seat (711) and the lower mounting seat (712), and are respectively arranged at both ends of the upper mounting seat (711) and the lower mounting seat (712) along the axial direction.

2. The gas turbine power generation unit for offshore platform according to claim 1, characterized in that: The bottom end of the upper mounting seat (711) is concave to form a square upper cavity, and the top end of the lower mounting seat (712) is concave to form a square upper cavity, and the lower mounting seat (712) is inserted upward into the upper cavity; the main damping spring group (714) is installed in the lower cavity, and the top end extends out of the lower cavity to elastically support the upper mounting seat (711); two groups of axial damping springs (715) are respectively arranged at the axial ends of the lower mounting seat (712), and are located between the end surface of the lower mounting seat (712) and the inner side wall of the corresponding upper cavity; The first shock absorber (71) further comprises a plurality of guide bolts (713) and a vertical shock absorbing spring (716) sleeved on each guide bolt (713); the plurality of guide bolts (713) are vertically arranged in sequence along the periphery of the lower mounting seat (712); the upper mounting seat (711) is slidably mounted on the plurality of guide bolts (713) in an up-and-down manner; the vertical shock absorbing spring (716) is located between the upper mounting seat (711) and the upper end nut of the corresponding guide bolt (713).

3. The gas turbine power generation unit for offshore platform according to claim 1, characterized in that: The main engine equipment module (10) further comprises a base (12) supported on the base support module (70), a main engine housing (13) fixedly mounted on the base (12), an auxiliary support (14) located in the main engine housing (13) and supported on the base (12), a main support (15) and an intake volute (16), a coupling (17), a starter unit (18) integrating a starter motor (181) and a generator (182), an operation control device (19), and a generator lubricating oil system (21), a combustion engine lubricating oil system (22), a fuel system (23) and an electrical control system (24) connected to the operation control device (19); The gas turbine (11) is axially supported on the auxiliary support (14) and the main support (15), and the air intake end of the gas turbine (11) is connected to the air intake volute (16) and the coupling (17) in sequence, and the exhaust end thereof is connected to the exhaust silencer module (60) located outside the main engine housing (13); The exhaust end of the air intake system module (30) extends into the main engine case body (13) and is connected to the air intake volute (16), and the case ventilation module (40) is connected to the main engine case body (13); The starting unit (18) and the operating control device (19) are both located outside the main engine housing (13) and supported on the base (12). The coupling (17) extends out of the main engine housing (13) and is axially connected to the starting unit (18).

4. The gas turbine power generation unit for offshore platform according to claim 3, characterized in that: The starting unit (18) further comprises an installation cover (183) arranged outside the starting motor (181) and the generator (182), an inner labyrinth seal (184), an outer labyrinth seal (185) and a secondary seal (186); The starter motor (181) is axially mounted on the non-driving shaft of the generator (182); the driving shaft of the generator (182) axially penetrates the side plate of the mounting cover (183) and is connected to the coupling (17); An inner labyrinth seal (184), an outer labyrinth seal (185) and a secondary seal (186) are sequentially mounted on the drive shaft of the generator (182) from the inside to the outside along the axial direction and are located between mounting shaft holes opened on the side plate of the mounting cover (183); A sealed instrument air bleed cavity (1830) is also provided between the outer labyrinth seal (185) and the secondary seal (186) to introduce slightly positive pressure instrument air.

5. The gas turbine power generation unit for offshore platform according to claim 3, characterized in that: The gas turbine power generation unit for an offshore platform also includes an air intake system module (30), a box ventilation module (40), a lubricating oil cooling module (50), an exhaust silencer module (60) and a fire extinguishing device module (80) which are integrated and modularized; The lubricating oil cooling module (50), the exhaust muffler module (60) and the fire extinguishing device module (80) are respectively supported on the platform frame, and the lubricating oil cooling module (50) and the fire extinguishing device module (80) are respectively arranged at two ends of the length direction of the main equipment module (10), and the exhaust muffler module (60) is arranged close to the fire extinguishing device module (80); The air intake system module (30) is connected to the air intake port of the host device module (10) to provide dry and clean combustion air to the host device module (10), and the exhaust muffler module (60) is connected to the exhaust port of the host device module (10) to treat and discharge the exhaust gas generated by the combustion. The box ventilation module (40) is used to filter the external cold air and input it into the host equipment module (10), and at the same time bring the stale air in the host equipment module (10) out of the host equipment module (10); the lubricating oil cooling module (50) is used to cool the lubricating oil input into the host equipment module (10); and the fire extinguishing device module (80) is used to alarm when a fire occurs and extinguish the fire source automatically or manually.

6. The gas turbine power generation unit for offshore platform according to claim 5, characterized in that: The air intake system module (30) comprises an electric heating deicing device (31), an air intake filter device (32), an air intake elbow (33) and an air intake muffler (34) which are sequentially connected along the air intake direction; The exhaust end of the air intake muffler (34) extends into the main engine housing (13) and is connected to the air intake volute (16).

7. The gas turbine power generation unit for offshore platform according to claim 5, characterized in that: The box ventilation module (40) comprises an air intake system and an air exhaust system which are respectively arranged at two ends of the gas turbine (11), wherein the air intake system is arranged close to the air intake system module (30), and the air exhaust system is arranged close to the exhaust silencer module (60); The air intake system comprises an air intake filter device (41), an air intake muffler (42), an air intake pipe, an air intake damper (43) and a first pneumatic actuator (44); the air intake filter device (41), the air intake muffler (42) and the air intake pipe are sequentially connected along the air intake direction; the air intake pipe passes through the top plate of the main chassis body (13) from outside to inside; the air intake damper (43) is arranged in the air intake pipe and connected to the first pneumatic actuator (44); the first pneumatic actuator (44) is also connected to the operation control device (19); The exhaust system comprises an exhaust duct, an exhaust partition damper, a second pneumatic actuator (45), an exhaust fan (46), an exhaust muffler (47) and an exhaust louver (48). The exhaust duct, the exhaust fan (46) and the exhaust muffler (47) are connected in sequence along the exhaust direction. The exhaust duct passes through the top plate of the main chassis body (13) from the inside to the outside. The exhaust partition damper is arranged in the exhaust duct and connected to the second pneumatic actuator (45). The second pneumatic actuator (45) is also connected to the operation control device (19). The exhaust louver (48) is arranged on the exhaust end of the exhaust muffler (47).

8. The gas turbine power generation unit for offshore platform according to claim 5, characterized in that: The lubricating oil cooling module (50) comprises a cooler base (51) supported on a platform frame, an upper fin tube group (52) and a lower fin tube group (53) arranged in sequence up and down, and a cooling fan (54) connected to one side of the upper fin tube group (52) and the lower fin tube group (53); The generator lubricating oil inlet (521) of the upper fin tube group (52) is connected to the lubricating oil tank, the generator lubricating oil outlet (522) of the upper fin tube group (52) is connected to the generator (182), and the upper fin tube group (52) is also provided with a generator lubricating oil drain outlet (523); The engine lubricating oil inlet (531) of the lower fin tube group (53) is connected to the lubricating oil tank, the engine lubricating oil outlet (532) of the lower fin tube group (53) is connected to the engine, and the lower fin tube group (53) is also provided with an engine lubricating oil drain outlet (533).

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