Movable gas turbine combined cycle generator set

Abstract

The invention relates to a mobile gas turbine combined cycle generator set. The circulating generator set comprises a gas turbine generator set, a waste heat recovery unit, a steam turbine generator set and a condensation steam unit. The waste heat recovery unit is used for recovering tail gas, forming high-temperature and high-pressure steam and transferring the steam to the steam turbine generator unit. The steam turbine generator set pushes a steam turbine rotor to rotate through high-temperature and high-pressure steam, and the steam turbine generator set exhausts the steam which does work to the condensing steam unit; the condensing steam unit is used for cooling exhausted steam exhaust and conveying condensed water formed by cooling to the waste heat recovery unit; and the gas turbine generator set, the waste heat recovery unit, the steam turbine generator set and the condensation steam unit are respectively integrated in the movable equipment and are mutually connected in the movable equipment to form a circulating generator set.

Description

Technical Field

[0001] This application relates to the field of mobile gas turbine power generation, and particularly to a mobile gas turbine combined cycle power generation unit. Background Art

[0002] Mobile gas turbine power generation units have the characteristics of high power density, strong mobility, and convenient use. They can quickly reach the site to provide power and are currently widely used in well site power consumption, emergency rescue, and on-site power supply projects in areas with underdeveloped power grids. However, the single-cycle power generation efficiency of mobile gas turbines is about 30%-40% (direct combustion power generation), and the exhaust gas is discharged to the atmosphere at a temperature of about 500°C without being utilized, which is very low in terms of energy conversion efficiency.

[0003] In addition, the output power of gas turbine power generation units is affected by environmental temperature and altitude. The higher the temperature and altitude, the smaller the power generation. Therefore, in high-temperature or high-altitude environments, the maximum power of mobile gas turbine power generation units is lower than the power under its standard conditions (15°C, 0-meter altitude), resulting in performance problems of electrical equipment due to insufficient power supply.

[0004] Currently, combined cycle power generation units are basically fixed power generation units with an efficiency of 55%-60% (using waste heat for power generation), and some advanced models can reach more than 62%. However, the waste heat boilers and condensers currently used in combined cycles are relatively large in volume, making mobile transportation and installation very inconvenient. Summary of the Invention

[0005] This application provides a mobile gas turbine combined cycle power generation unit to solve the technical problem in the above-mentioned prior art that the waste heat boilers and condensers used in combined cycles are relatively large in volume, making mobile transportation and installation very inconvenient.

[0006] The present invention provides a mobile gas turbine combined cycle power generation unit, including: a gas turbine power generation unit, a waste heat recovery unit, a steam turbine power generation unit, and a condensing unit; wherein, the gas turbine power generation unit generates tail gas during the fuel combustion process; the waste heat recovery unit is connected to the exhaust port of the gas turbine power generation unit, and the waste heat recovery unit is used to recover the tail gas and form high-temperature and high-pressure steam, which is transferred to the steam turbine power generation unit; the steam turbine is connected to the outlet of the waste heat boiler, and the steam turbine power generation unit drives the steam turbine rotor to rotate through the high-temperature and high-pressure steam. The steam turbine power generation unit discharges the steam that has completed work to the condensing unit; the condensing unit is used to cool the discharged steam exhaust and transport the condensed water formed by cooling to the waste heat recovery unit; the gas turbine power generation unit, the waste heat recovery unit, the steam turbine power generation unit, and the condensing unit are respectively loaded in mobile devices and are interconnected in the mobile devices to form a cycle power generation unit.

[0007] Among them, the mobile gas turbine combined cycle power generation unit further includes a power distribution unit, which is used to receive the electric energy generated by the gas turbine power generation unit and / or the steam turbine power generation unit, and at the same time is used to supply electric energy to the condensing steam unit and the waste heat recovery unit; the power distribution unit is configured to be integrated into a mobile device and is interconnected with the gas turbine power generation unit, the waste heat recovery unit, the steam turbine power generation unit and the condensing steam unit to form a cycle power generation unit.

[0008] Among them, the mobile device includes one of a transportation tool or a skid-mounted device.

[0009] Among them, the waste heat recovery unit includes a waste heat boiler, an exhaust auxiliary device and an exhaust pipe. The exhaust auxiliary device is installed between the waste heat boiler and the exhaust pipe. The exhaust auxiliary device acts directly on the exhaust pipe. The exhaust auxiliary device is configured to reduce the volume of the waste heat boiler without increasing the exhaust back pressure of the gas turbine.

[0010] Among them, the waste heat recovery unit includes a hydraulic turning device and a hydraulic system. The hydraulic turning device is installed on one side of the exhaust pipe. The hydraulic system is used to drive the hydraulic turning device to rotate so as to change the vertical installation orientation of the exhaust pipe to a horizontal laying orientation.

[0011] Among them, the steam turbine power generation unit includes a steam turbine. The steam turbine includes a steam discharge channel extending along its own axial direction. A steam turbine exhaust connection pipe is installed at the tail of the steam discharge channel. The steam turbine is connected to the intake port of the condensing steam unit through the steam turbine exhaust connection pipe.

[0012] Among them, the gas turbine power generation unit includes an exhaust muffler and a gate plate. The gate plate is installed on the exhaust muffler in an openable and closable manner. When the gate plate is in the open state, the tail gas is discharged from the outlet of the exhaust muffler. When the gate plate is in the closed state, the tail gas flows to the waste heat boiler and is discharged through the exhaust pipe.

[0013] Among them, the gas channel between the gas turbine power generation unit and the waste heat recovery unit is connected through an expansion joint. Both sides of the expansion joint are connected to the gas turbine power generation unit and the waste heat recovery unit through flanges.

[0014] Among them, the waste heat recovery unit and the steam turbine power generation unit are connected through a pipeline.

[0015] Among them, the condensing steam unit includes a condenser, a fan and a driving motor. The driving motor is electrically connected to the fan. The fan is used to blow air towards the condenser.

[0016] Among them, the power distribution unit includes a diesel generator. In the state where the entire generator set has no power, the diesel generator starts generating electricity first and provides initial power for the power distribution unit, so that the power distribution unit has the black start ability. When the entire unit is in a shutdown state, the power distribution unit can provide black start power for the gas turbine generator set; the power distribution unit is electrically connected to the gas turbine generator set and the steam turbine generator set respectively, and is used to realize the parallel operation of the gas turbine generator set and the steam turbine generator set.

[0017] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0018] The mobile gas turbine combined cycle generator set provided by the embodiment of the present application can integrate the gas turbine generator set, the waste heat recovery unit, the steam turbine generator set and the condensing steam unit in the combined cycle generator set into a mobile device, and form a complete air flow passage and circuit connection passage on the mobile device, and then connect them to form a combined cycle generator set in the mobile device. In this way, the gas turbine generator set, the waste heat recovery unit, the steam turbine generator set and the condensing steam unit can be modularly designed in the mobile device, and the generator sets of each module can be installed in a mobile device to realize the rapid movement of the combined cycle generator set following the mobile device to adapt to the requirements of different application scenarios. Description of the Drawings

[0019] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, the drawings in the drawings do not constitute a proportional limitation.

[0022] Figure 1 It is a schematic diagram of the overall structure of the mobile combined cycle generator set provided by the embodiment of the present application;

[0023] Figure 2Schematic diagram of on-site equipment connection and cable pipeline connection for the gas turbine generator set, waste heat recovery unit, steam turbine generator set, condensing steam turbine unit and distribution generator set provided in the embodiments of the present application;

[0024] Figure 3 Single-line diagram of low voltage and medium voltage for the mobile gas turbine combined cycle power generation unit provided in the embodiments of the present application;

[0025] Figure 4 Schematic diagram of the connection structure between the gas turbine generator set and the waste heat recovery unit provided in the embodiments of the present application;

[0026] Figure 5 Schematic diagram of the structure of the waste heat recovery unit in the state of the exhaust pipeline being flipped during transportation provided in the embodiments of the present application;

[0027] Figure 6 Schematic diagram of the connection structure between the steam turbine generator set and the condensing steam turbine unit provided in the embodiments of the present application;

[0028] Figure 7 Schematic diagram of the external shape structure of the steam turbine generator set provided in the embodiments of the present application;

[0029] Figure 8 Schematic diagram of the external shape structure of the distribution generator set provided in the embodiments of the present application.

[0030] Explanation of reference numerals:

[0031] T1, gas turbine generator set; T2, waste heat recovery unit; T3, steam turbine generator set; T4, condensing steam turbine unit; T5, distribution generator set;

[0032] 101, chassis truck 1; 102, auxiliary power cabinet for gas turbine power generation; 103, gas turbine power generation cabin; 104, cabin ventilation filter; 105, generator ventilation and heat dissipation exhaust port; 106, gas turbine inlet filter; 107, gas turbine cabin ventilation exhaust port; 108, exhaust silencer cover plate; 109, exhaust silencer; 110, gas turbine; 111, intake volute; 112, coupling; 113, generator; 114, lubrication system; 115, support system; 116, outgoing line cabinet for gas turbine power generation; 117, transformer cabinet for gas turbine power generation vehicle;

[0033] 201, shutter; 202, waste heat boiler; 203, exhaust pipeline; 204, waste heat recovery vehicle chassis; 205, hydraulic flipping device; 206, support system; 207, hydraulic system; 208, diffusion pipeline; 209, expansion joint; 210, exhaust auxiliary device; 211, electrical system of waste heat recovery vehicle;

[0034] 301. Turbine auxiliary power cabinet (turbine electrical cabinet); 302. Turbine generator set cabin; 303. Turbine generator (Generator No. 2); 304. Coupling; 305. Turbine; 306. Turbine exhaust connection pipe; 307. Turbine generator chassis truck; 308. Lubrication system of turbine generator truck; 309. Support system of turbine generator truck; 310. Generator exhaust port; 311. Generator cabin door A; 312. Turbine cabin door; 313. Generator ventilation filter; 314. Generator cabin inspection opening; 315. Generator cabin door B; 317. Turbine generator outgoing line cabinet;

[0035] 401. Condenser diffusion pipe; 402. Condenser; 403. Feed water pump; 404. Electrical system of condensate truck; 405. Condensate truck chassis truck; 406. Condensate water tank; 407. Make-up water system; 408. Support system of condensate truck;

[0036] 501. Air conditioning system; 502. Low-voltage auxiliary power cabinet; 503. Transformer cabinet; 504. Medium-voltage paralleling cabinet; 505. Medium-voltage incoming line cabinet for gas turbine power generation; 506. Medium-voltage incoming line cabinet for steam turbine power generation; 507. Distribution truck cabin; 508. Black start generator; 509. Operation platform for black start generator; 510. Medium-voltage incoming line connector for steam turbine power generation; 511. Medium-voltage incoming line connector for gas turbine power generation; 512. Medium-voltage outgoing line connector for distribution truck; 513. Low-voltage auxiliary power wiring box; 514. Support system of distribution truck; 515. Distribution truck chassis; 516. Distribution truck material bin. Detailed implementation manners

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0038] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0039] For ease of description, spatial relative relationship terms may be used in the text to describe the relative position relationship or movement of one element or feature shown in the figure with respect to another element or feature. These relative relationship terms are, for example, "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", "front", "rear", etc. Such spatial relative relationship terms are intended to include different orientations of the device during use or operation other than the orientations depicted in the figure. For example, if the device in the figure undergoes a position flip, attitude change, or movement state change, then these directional indications will change accordingly. For example, an element described as "below other elements or features" or "beneath other elements or features" will subsequently be oriented as "above other elements or features" or "over other elements or features". Therefore, the exemplary term "below" can include both upper and lower orientations. The device may be oriented otherwise (rotated 90 degrees or in other directions), and the spatial relative relationship descriptions used in the text are accordingly interpreted.

[0040] Based on the problem that most existing combined cycle power generation units are fixedly installed in a fixed location and cannot be moved to adapt to more application scenarios, an embodiment of the present application provides a mobile gas turbine combined cycle power generation unit, which can integrate each module in the cycle power generation unit into a mobile device and can move with the movement of the mobile device, thereby adapting to the needs of more application scenarios.

[0041] Reference Figures 1 - 8 Referring to, the mobile gas turbine combined cycle power generation unit provided by the embodiment of the present application includes a gas turbine power generation unit T1, a waste heat recovery unit T2, a steam turbine power generation unit T3, and a condensing unit T4; wherein, the gas turbine power generation unit T1 generates tail gas during the fuel combustion process; the waste heat recovery unit T2 is connected to the exhaust port of the gas turbine power generation unit T1, and the waste heat recovery unit T2 is used to recover the tail gas and form high-temperature and high-pressure steam, which is transferred to the steam turbine power generation unit T3; the steam turbine 305 is connected to the outlet of the waste heat boiler 202, and the steam turbine power generation unit T3 drives the rotor of the steam turbine 305 to rotate through the high-temperature and high-pressure steam. The steam turbine power generation unit T3 discharges the steam that has completed work to the condensing unit T4; the condensing unit T4 is used to cool the discharged steam exhaust and convey the condensed water formed by the cooling to the waste heat recovery unit T2; the gas turbine power generation unit T1, the waste heat recovery unit T2, the steam turbine power generation unit T3, and the condensing unit T4 are respectively loaded in a mobile device and are interconnected in the mobile device to form a cycle power generation unit.

[0042] The mobile gas turbine combined cycle power generation unit further includes: a power distribution unit T5, which is used to receive the electric energy generated by the gas turbine power generation unit T1 and / or the steam turbine power generation unit T3, and at the same time is used to supply electric energy to the condensing steam unit T4 and the waste heat recovery unit T2; the power distribution unit T5 is configured to be integrated into a mobile device and is interconnected with the gas turbine power generation unit T1, the waste heat recovery unit T2, the steam turbine power generation unit T3 and the condensing steam unit T4 to form a cycle power generation unit.

[0043] It should be noted that each module in the cycle power generation unit is integrally installed in the same mobile device and can perform cycle power generation on the mobile device.

[0044] In this way, the gas turbine power generation unit T1, the waste heat recovery unit T2, the steam turbine power generation unit T3, the condensing steam unit T4 and the power distribution unit T5 in the mobile device can be modularly designed, and the units of each module can be installed in a mobile device to realize the rapid movement of the cycle power generation unit following the mobile device to adapt to the requirements of different application scenarios.

[0045] Considering the mobile carrier scheme of the mobile combined cycle power generation unit, in the mobile combined cycle power generation unit provided by the embodiment of the present application, the mobile device includes one of a transportation vehicle or a skid-mounted device.

[0046] Exemplarily, the transportation vehicle can be a loading vehicle with wheels. The embodiment of the present application does not limit the model, category and function of the loading vehicle, as long as it can transport each module on the mobile combined cycle power generation unit to the required application scenario.

[0047] Exemplarily, the transportation vehicle can be any one of a heavy truck, a railway train, a cargo ship or a barge.

[0048] When a heavy truck is used as the transportation vehicle, the truck chassis is strengthened and designed, equipped with a suspension system with high load-bearing capacity and large-size tires to adapt to the weight and size of the combined cycle power generation unit. The whole combined cycle power generation unit is fixedly installed in the truck carriage and is firmly connected through high-strength bolts, pressure plates and shock pads to prevent equipment damage caused by bumps and vibrations during transportation. At the same time, guardrails and rain shelters are also set around the carriage, which can not only ensure the safety of the equipment but also resist bad weather outside. This scheme is suitable for road transportation and can quickly transport the mobile combined cycle power generation unit to the power demand location. For example, in the event of a sudden power outage in the city, it can quickly arrive at the scene to provide emergency power support.

[0049] When using a railway freight car as the means of transportation, it has a dedicated railway freight car compartment. The interior of the compartment is optimized for layout according to the shape and size of the generator set, and is designed with dedicated fixed slots and fastening devices. After hoisting the combined cycle generator set into the compartment, it is initially positioned through the slots, and then comprehensively fixed using the fastening devices to ensure that the equipment will not be displaced during railway transportation. In addition, ventilation openings and temperature and humidity monitoring devices are provided at the top of the compartment to maintain suitable environmental conditions inside the compartment. This solution is suitable for long-distance and large-volume transportation requirements, such as transporting the generator set from the production base to the site of large-scale engineering construction projects in remote areas.

[0050] When using a ship or barge as the means of transportation, it can be adapted to scenarios that require cross-sea or along-river waterway transportation. A cargo ship or barge is selected as the means of transportation. Anti-slip steel plates are laid at the bottom of the cabin, and adjustable support brackets are installed. After placing the generator set on the anti-slip steel plates, the equipment is kept in a horizontal state by adjusting the support brackets, and then it is firmly fixed in the cabin using steel cables and tensioners. At the same time, waterproof and sealed cabin doors and a drainage system are provided in the cabin to prevent seawater or river water from entering and affecting the performance of the equipment. This method is applicable to the transportation of mobile combined cycle generator sets in areas such as islands and coastal cities.

[0051] Exemplarily, the skid-mounted equipment can be a modular skid-mounted solution. The combined cycle generator set is split into multiple functional modules, such as a gas turbine module, a waste heat recovery module, a steam turbine module, a power distribution module, etc. Each module is separately installed on an independent skid-mounted base. The skid-mounted base adopts a steel structure framework, is equipped with rollers or slide rails for easy movement at the bottom, and lifting interfaces and quick connection interfaces are provided on the side. During transportation, each module can be hoisted and carried separately. After arriving at the destination, the various modules are assembled through the quick connection interfaces to form a complete mobile combined cycle generator set. This solution has strong flexibility, is convenient for transportation and on-site installation and commissioning, and is applicable to places with complex terrain and limited transportation space, such as power supply for communication base stations in mountainous areas.

[0052] Exemplarily, the skid-mounted equipment can be an integral skid-mounted solution, which has an integral skid-mounted base whose size and load-bearing capacity can meet the installation requirements of the entire combined cycle generator set. The base is welded from high-strength steel and has good rigidity and stability. Each component of the combined cycle generator set is directly installed on the skid-mounted base. Protective fences and maintenance channels are provided around the base, and a detachable rain and dust-proof canopy is installed on the top. At the same time, a hydraulic lifting device and walking wheels are installed at the bottom of the base to facilitate movement and positioning under different terrain conditions. This solution is applicable to scenarios with high requirements for the integrity of the equipment and frequent mobile operations, such as power supply for oilfield field operations.

[0053] Exemplarily, the skid-mounted equipment can be a containerized skid-mounted solution, with dedicated containerized skid-mounted equipment. The interior of the container is customized according to the layout of the combined cycle power generation unit, and equipment installation brackets and shock-absorbing devices are provided. After the power generation unit is installed, the container is sealed with sealing rubber strips and latches to ensure the safety and protection of the equipment during transportation and storage. Standard lifting corner fittings are provided at the four corners of the container, facilitating loading, unloading, and handling using a crane. At the same time, an openable maintenance door is provided on the side to facilitate the daily maintenance and repair of the equipment. This solution is convenient for realizing standardized production and transportation, can be combined with various transportation tools, and improves transportation efficiency.

[0054] In this way, using a transportation tool or skid-mounted equipment as the mobile carrier of the mobile combined cycle power generation unit has significant advantages. The transportation tool can achieve long-distance and rapid transfer through a mature transportation network and can quickly respond in scenarios of urgent power demand; the skid-mounted equipment has its own mobile function and can flexibly cope with complex terrains. Both are optimized for different environments and can ensure the transportation and use of the equipment under various harsh conditions. The modular design of the skid-mounted equipment facilitates handling and assembly. Combining with the protection function of the transportation tool, it realizes efficient installation and convenient maintenance. At the same time, by using existing transportation facilities and standardized production, the cost can be effectively controlled, resource utilization can be optimized, and the benefits of the entire life cycle of the mobile combined cycle power generation unit can be maximized.

[0055] Considering the cyclic application of the combined cycle power generation unit on the transportation tool or skid-mounted equipment, the steam generated during the operation of the gas turbine power generation unit T1. In order to further utilize the steam energy, in the mobile gas turbine combined cycle power generation unit provided by the embodiment of the present application, the waste heat recovery unit T2 includes a waste heat boiler 202, an exhaust gas auxiliary device 210, and an exhaust gas pipeline 203. Among them, the exhaust gas auxiliary device 210 is installed between the waste heat boiler 202 and the exhaust gas pipeline 203, and the exhaust gas auxiliary device 210 directly acts on the exhaust gas pipeline 203. The exhaust gas auxiliary device 210 is configured to reduce the volume of the waste heat boiler 202 without increasing the exhaust gas back pressure of the gas turbine.

[0056] In this way, after the tail gas absorbs heat in the waste heat boiler 202, the temperature will decrease, and the temperature of the tail gas in contact with the exhaust gas auxiliary device 210 will also decrease, which is more conducive to the design of the exhaust gas auxiliary device 210. In fact, the exhaust gas auxiliary device 210 can be understood as a suction pump, which sucks the tail gas entering the waste heat boiler 202 and discharges the sucked tail gas into the exhaust gas pipeline 203 to reduce the exhaust gas resistance of the gas turbine.

[0057] Meanwhile, it effectively solves the contradiction problem in the traditional waste heat recovery system, namely, the large volume of equipment and the decrease in gas turbine efficiency caused by the increase in back pressure. Specifically, the relatively small volume of the waste heat boiler 202 significantly reduces the equipment floor area and manufacturing cost, and improves the compactness and economy of the system. At the same time, the exhaust back pressure of the gas turbine is kept unchanged, avoiding the negative impact on the gas turbine performance caused by the increase in back pressure, and ensuring the efficient and stable operation of the entire combined cycle power generation unit. In addition, the direct action of the exhaust gas auxiliary device 210 on the exhaust duct 203 may also enhance the heat exchange efficiency in the waste heat boiler 202, further improving the energy recovery utilization rate.

[0058] Exemplarily, the exhaust gas auxiliary device 210 reduces the flow resistance of the exhaust gas in the waste heat boiler 202 by optimizing the gas flow distribution and flow characteristics in the exhaust duct 203, such as using guide vanes, diffuser structures or local flow path adjustments. According to the principles of fluid mechanics (Bernoulli equation and continuity equation), with the exhaust gas flow rate remaining unchanged, the exhaust back pressure can be effectively maintained stable by reducing the flow resistance. This design avoids the problem of increased back pressure caused by the narrowing of the flow path due to the reduction in volume of the traditional waste heat boiler 202.

[0059] Exemplarily, the exhaust gas auxiliary device 210 makes the heat exchange process of the high-temperature exhaust gas in the waste heat boiler 202 more sufficient and efficient by enhancing the turbulence degree of the exhaust gas or changing the gas flow direction. According to the principles of heat transfer (relationship between Nusselt number and heat transfer coefficient), enhanced turbulent flow can significantly increase the heat transfer coefficient, so that under the same heat transfer requirement, the required heat exchange area can be reduced, and thus the volume of the waste heat boiler 202 can be allowed to be reduced. For example, by arranging flow disturbing elements in the exhaust duct 203 or adopting a special spiral flow path design, the heat exchange efficiency between the exhaust gas and the working medium (such as water or steam) in the waste heat boiler 202 can be improved, achieving the same heat recovery effect with a smaller volume.

[0060] Exemplarily, the exhaust gas auxiliary device 210 and the peripheral layout of the waste heat boiler 202 form a cooperative working mode. The direct action of the exhaust gas auxiliary device 210 on the exhaust duct 203 not only optimizes the gas flow distribution, but may also further ensure the efficient operation of the waste heat boiler 202 through additional functions such as vibration suppression or noise control. For example, by reducing the vibration of the exhaust duct 203, the problem of decreased heat transfer efficiency caused by vibration can be reduced, and at the same time, the service life of the equipment can be extended. This synergistic effect enables the waste heat boiler 202 to maintain good performance even when its volume is reduced.

[0061] Considering the problem of meeting the traffic height limit during the transportation of a combined cycle power generation unit, in the mobile gas turbine combined cycle power generation unit provided by the embodiments of the present application, the waste heat recovery unit T2 includes a hydraulic turning device 205 and a hydraulic system 207. The hydraulic turning device 205 is installed on one side of the exhaust pipe 203, and the hydraulic system 207 is used to drive the hydraulic turning device 205 to rotate, so as to change the longitudinal vertical position of the exhaust pipe 203 to a horizontal position.

[0062] In this way, through the cooperation of the hydraulic turning device 205 and the hydraulic system 207, the problem of traffic height limit during the transportation of the mobile gas turbine combined cycle power generation unit is effectively solved. During transportation, the exhaust pipe 203 can be turned from the longitudinal vertical position to the horizontal position, reducing the height of the entire unit, enabling it to smoothly pass through the height limit section, and improving the transportation convenience and mobility of the unit; after arriving at the destination, the exhaust pipe 203 can be quickly restored to the longitudinal vertical position to ensure the normal operation of the waste heat recovery unit T2 without affecting the performance and efficiency of the power generation unit. In addition, the precise control of the hydraulic system 207 and the setting of the limit mechanism ensure the safety, stability and accuracy of the turning process of the exhaust pipe 203, avoiding damage to the equipment caused by incomplete turning or excessive turning.

[0063] Exemplarily, the hydraulic turning device 205 mainly consists of a turning bracket, a rotating shaft, a hydraulic cylinder and a limit mechanism. The turning bracket is a frame structure, welded with high-strength steel, and its size is adapted to the exhaust pipe for fixing the exhaust pipe; the rotating shaft is installed on one side of the turning bracket as the rotation center of the exhaust pipe 203, and is fixed on the base of the waste heat recovery unit T2 through a bearing seat to ensure the smoothness and stability of rotation; the hydraulic cylinder is a double-acting hydraulic cylinder, one end of the cylinder barrel is hinged to the base of the waste heat recovery unit T2, and the end of the piston rod is hinged to the turning bracket, and the turning bracket is pushed to rotate around the rotating shaft by the telescopic movement of the hydraulic cylinder; the limit mechanism includes limit blocks and sensors. The limit blocks are respectively installed at two extreme positions of the longitudinal vertical and horizontal positions of the turning path of the turning bracket, and the sensors are used to detect whether the turning bracket reaches the predetermined position to ensure the accuracy of the turning process.

[0064] Exemplarily, the hydraulic system 207 is composed of a hydraulic pump, an oil tank, a directional control valve, a relief valve, a pressure gauge, oil pipes, and a hydraulic cylinder. The hydraulic pump is a gear pump, installed above the oil tank, connected to the motor through a coupling, and provides power for the system; the oil tank is used to store hydraulic oil and filter and dissipate heat from the hydraulic oil; the directional control valve is an electromagnetic directional control valve, installed on the oil pipe at the outlet of the hydraulic pump, and changes the flow direction of the hydraulic oil by controlling the on and off of the electromagnetic coil to achieve the telescopic control of the hydraulic cylinder; the relief valve is used to set the maximum pressure of the system to prevent damage to components due to excessive system pressure; the pressure gauge is installed on the oil pipe between the directional control valve and the hydraulic cylinder to monitor the system pressure in real time; the oil pipes are made of high-pressure rubber hoses to connect various hydraulic components and ensure the smooth transmission of hydraulic oil.

[0065] Exemplarily, the hydraulic tilting device 205 is installed on one side of the exhaust pipe 203 close to the base of the waste heat recovery unit T2. The tilting bracket is tightly connected to the exhaust pipe through bolts to ensure that the exhaust pipe 203 will not loosen during the tilting process; components such as the hydraulic pump, oil tank, and directional control valve of the hydraulic system 207 are centrally installed on one side of the base of the waste heat recovery unit T2 and are connected to the hydraulic cylinder through oil pipes. The cylinder barrel of the hydraulic cylinder is hinged to the fixed ear seat of the base through a pin shaft, and the end of the piston rod is hinged to the connecting ear seat of the tilting bracket through a pin shaft to form a stable transmission structure. When it is necessary to tilt the exhaust pipe 203, the electromagnetic directional control valve is energized, and the hydraulic oil output by the hydraulic pump enters the rodless cavity of the hydraulic cylinder through the directional control valve, pushing the piston rod to extend, driving the tilting bracket to rotate around the rotation axis, and changing the orientation of the exhaust pipe 203 from the longitudinal vertical position to the horizontal flat position; conversely, the hydraulic oil enters the rod chamber of the hydraulic cylinder, the piston rod retracts, and the exhaust pipe 203 returns to the longitudinal vertical position.

[0066] Considering that when the steam turbine generator set T3 is integrated into a mobile device, it is convenient to connect with the condensing steam turbine unit T4, and at the same time increase the output power of the steam turbine 305. In the mobile gas turbine combined cycle power generation set provided by the embodiment of the present application, the steam turbine generator set T3 includes a steam turbine 305. The steam turbine 305 includes a steam discharge channel extending along its own axial direction. A steam turbine exhaust connection pipe 306 is installed at the tail of the steam discharge channel. The steam turbine 305 is connected to the intake port of the condensing steam turbine unit T4 through the steam turbine exhaust connection pipe 306.

[0067] In this way, by providing an axially extending steam discharge passage in the steam turbine 305 and installing a steam turbine exhaust connection pipe 306 at the tail of the passage for connecting to the intake port of the condensing steam turbine unit T4, dual technical effects are achieved. On the one hand, in a mobile gas turbine combined cycle power generation unit, the standardized and integrated design of the exhaust connection pipe enables a more convenient and efficient connection between the steam turbine generator set T3 and the condensing steam turbine unit T4, significantly reducing the on-site installation and commissioning time and difficulty, and improving the overall integration level and mobile applicability of the equipment. On the other hand, the axially extending steam discharge passage optimizes the steam flow path, reduces the flow resistance of the steam inside the steam turbine 305, reduces energy losses, enables more steam energy to be effectively converted into the mechanical energy of the steam turbine 305, and thus significantly increases the output power of the steam turbine 305, enhancing the power generation efficiency and energy utilization rate of the entire combined cycle power generation unit.

[0068] Among them, the steam turbine exhaust connection pipe 306 is used as the connecting component between the steam turbine 305 and the condensing steam turbine unit T4, forming a standardized interface structure. In mobile equipment, this connection pipe can be pre-installed and commissioned before leaving the factory. After arriving at the site, it only needs to be quickly docked with the intake port of the condensing steam turbine unit T4 (such as by using flange connections, quick connectors, etc.), without complex on-site processing and adjustment, greatly simplifying the connection process. At the same time, the fixed connection position and structural design ensure the stability of the connecting components during the movement of the equipment, avoiding loosening or damage of the connection due to factors such as vibration and displacement, and ensuring the reliability of the system operation.

[0069] According to the principles of fluid mechanics, when steam flows in a pipe, its energy loss is closely related to the flow resistance. The axially extending steam discharge passage along the steam turbine provides a smoother and more direct flow path for the steam, reducing the vortex and turbulence phenomena during the steam flow process compared to non-axial or curved passage designs. According to the Darcy-Weisbach formula, the better passage design reduces the frictional resistance along the way, resulting in a reduction in the energy loss of the steam during the discharge process. In addition, from a thermodynamics perspective, reducing energy losses means that more internal energy of the steam can be converted into the mechanical energy of the steam turbine 305. According to the law of conservation of energy, this directly increases the output power of the steam turbine 305, thereby improving the power generation efficiency of the entire power generation unit.

[0070] Considering that the steam of the gas turbine generator set can flow to the waste heat boiler 202 in a preset scenario, in the solution of the mobile gas turbine combined cycle power generation unit provided by the embodiments of the present application, the gas turbine generator set T1 includes an exhaust silencer 109 and a shutter 201. The shutter 201 is installed on the exhaust silencer 109 in an openable and closable manner. When the shutter 201 is in the open state, the steam is discharged from the outlet of the exhaust silencer 109. When the shutter 201 is in the closed state, the steam flows to the waste heat boiler 202 and is discharged through the exhaust pipe 203.

[0071] In this way, by setting up an opening and closing gate plate 201 on the exhaust silencer 109 of the gas turbine generator set T1, the flexible control of the steam flow direction is realized, meeting the requirements of different preset scenarios. When it is necessary to quickly discharge steam, reduce the internal pressure of the system or conduct debugging under specific working conditions, the gate plate 201 is opened, and the steam can be directly discharged through the outlet of the exhaust silencer 109, ensuring the timeliness of the rapid pressure relief of the system and the adjustment of the working conditions. In the conventional operation scenario for energy recovery and utilization, the gate plate 201 is closed, enabling all the steam to flow into the waste heat boiler 202. The waste heat boiler 202 fully recovers and utilizes the heat carried by the steam, converting it into high-temperature and high-pressure steam that can drive the steam turbine 305 to generate electricity, significantly improving the energy utilization efficiency and increasing the power generation and economic benefits of the entire mobile gas turbine combined cycle power generation unit. At the same time, the presence of the exhaust silencer 109 effectively reduces the noise generated when the steam is discharged, reduces the noise pollution to the surrounding environment, and improves the environmental protection performance of the equipment operation.

[0072] Based on the principle of mechanical opening and closing structure, the gate plate 201 is installed inside the exhaust silencer 109 through connection methods such as hinges, slide rails or rotating shafts, forming a movable partition component. When the gate plate 201 is in the open state, it is separated from the inner wall of the exhaust silencer 109, without obstruction in the steam flow direction. Driven by its own pressure, the steam follows the principle of fluid mechanics that the pressure difference causes flow (i.e., flowing from the high-pressure area to the low-pressure area) and is directly discharged through the outlet of the exhaust silencer 109. When the gate plate 201 is in the closed state, the gate plate 201 closely adheres to the inner wall of the exhaust silencer 109, blocking the direct outward discharge channel of the steam, forcing the steam to change its flow direction under the action of pressure and enter the connecting pipeline of the waste heat boiler 202, thus realizing the switching of the steam flow direction.

[0073] From the perspective of thermodynamics, closing the gate plate 201 allows the steam to flow into the waste heat boiler 202. The waste heat boiler 202 uses equipment such as heat exchangers to utilize the temperature difference between the steam and the working medium (such as water) to transfer the heat of the steam to the working medium, causing the working medium to heat up and vaporize to generate high-temperature and high-pressure steam for power generation, realizing the secondary utilization of energy and improving the overall thermal efficiency of the system. In terms of noise control, the exhaust silencer 109 uses the principle of acoustic noise reduction. Through structures such as porous sound-absorbing materials, expansion chambers, and resonance cavities arranged inside, the sound waves generated when the steam is discharged are reflected, interfered, and absorbed inside the silencer, converting the sound energy into heat energy or other forms of energy and dissipating it, thereby reducing the steam discharge noise and achieving the noise reduction purpose.

[0074] Considering the connection scheme of the gas turbine generator set T1 and the waste heat recovery unit T2 on the mobile device, in the scheme of the mobile gas turbine combined cycle power generation set provided by the embodiment of the present application, the gas channel between the gas turbine generator set T1 and the waste heat recovery unit T2 is connected through the expansion joint 209, and both sides of the expansion joint 209 are connected to the gas turbine generator set T1 and the waste heat recovery unit T2 through flanges.

[0075] In this way, the gas channel connecting the gas turbine generator set T1 and the waste heat recovery unit T2 by using the expansion joint 209 significantly improves the stability and safety of the mobile gas turbine combined cycle power generation set during operation. During the movement of the device, the expansion joint 209 can effectively buffer the stress generated by factors such as road bumps and vibrations on the connection part, avoiding problems such as pipeline rupture and air leakage caused by rigid connection, ensuring the sealing performance and integrity of the gas channel, and ensuring the normal operation of the system. At the same time, when the high-temperature gas generated by the gas turbine during operation flows in the channel, it will cause thermal expansion and contraction of the pipeline. The expansion joint 209 can absorb the thermal displacement through its own elastic deformation, preventing the pipeline from being damaged due to thermal stress concentration and extending the service life of the device. In addition, the elastic characteristics of the expansion joint 209 can also play a certain role in isolating vibration for the mechanical vibration generated during the operation of the device, reducing vibration transmission, reducing the operation noise of the device, improving the reliability and environmental protection performance of the device, and ensuring the stable connection of the gas turbine generator set T1 and the waste heat recovery unit T2 on the mobile device, enhancing the overall adaptability of the device.

[0076] Considering the connection scheme of the waste heat recovery unit T2 and the steam turbine generator set T3 on the mobile device, in the mobile gas turbine combined cycle power generation set provided by the embodiment of the present application, the waste heat recovery unit T2 and the steam turbine generator set T3 are connected through pipelines.

[0077] In this way, connecting the waste heat recovery unit T2 and the steam turbine generator set T3 through pipelines effectively ensures the efficient operation of the mobile gas turbine combined cycle power generation set. The high-temperature steam obtained by the waste heat recovery unit T2 through heat exchange can be stably and efficiently transmitted to the steam turbine generator set T3 through the pipeline, ensuring that the steam energy can be fully converted into mechanical energy for power generation, improving the energy recovery utilization rate and power generation efficiency of the entire system. At the same time, the pipeline connection forms a standardized connection structure. On the mobile device, this connection method facilitates the overall layout and installation and commissioning of the device, reduces the complex on-site connection procedures, and reduces the installation cost and time cost. In addition, the pipeline has a certain degree of flexibility and adjustability, which can adapt to the slight displacement generated by factors such as road bumps and vibrations during the movement of the device, ensure the stability of the connection part, avoid problems such as steam leakage, maintain the sealing performance of the system, ensure the safe and reliable operation of the device, and enhance the applicability and reliability of the mobile gas turbine combined cycle power generation set in different environments.

[0078] Considering the rapid heat dissipation solution during the operation of the condenser 402, in the mobile gas turbine combined cycle power generation unit provided by the embodiment of the present application, the condensing steam turbine unit T4 includes a condenser 402, a fan, and a driving motor. The driving motor is electrically connected to the fan, and the fan is used to blow air towards the condenser 402.

[0079] In this way, by arranging a fan and a driving motor in the condensing steam turbine unit T4, an efficient heat dissipation system is constructed, significantly improving the operating performance of the mobile gas turbine combined cycle power generation unit. The driving motor drives the fan to continuously and directionally blow air towards the condenser 402, accelerating the air flow velocity on the surface of the condenser 402. According to the principle of convective heat transfer, the heat exchange efficiency between the condenser 402 and the air is greatly enhanced, enabling the condenser 402 to quickly dissipate heat, effectively reducing the temperature of the internal working medium, and ensuring its efficient condensation working state. The rapid heat dissipation avoids problems such as a decrease in condensation effect and system pressure imbalance caused by too high a temperature of the condenser 402, maintains the stability of the entire unit's thermal cycle, reduces the risk of equipment failure due to high temperature, and extends the service life of the equipment. In addition, the stable heat dissipation effect ensures that the exhaust steam discharged from the steam turbine generator set T4 can be condensed and recycled in a timely and sufficient manner, providing guarantee for the continuous operation of the system, thereby improving the overall power generation efficiency and reliability of the mobile gas turbine combined cycle power generation unit, enabling it to operate stably and efficiently under different ambient temperatures and working conditions.

[0080] Considering the black start solution of the power distribution unit T5, in the mobile gas turbine combined cycle power generation unit provided by the embodiment of the present application, the power distribution unit T5 includes a diesel generator. In the state of the entire power generation unit being without power, the diesel generator starts to generate electricity first and provides initial power for the power distribution unit T5, so that the power distribution unit T5 has the black start ability. When the entire unit is in a shutdown state, the power distribution unit T5 can provide black start power for the gas turbine generator set T1; the power distribution unit T5 is electrically connected to the gas turbine generator set T1 and the steam turbine generator set T3 respectively, and is used to realize the parallel operation of the gas turbine generator set T1 and the steam turbine generator set T3.

[0081] In this way, by configuring a diesel generator in the power distribution unit T5, a complete black start system is constructed, significantly enhancing the autonomous recovery ability and operation reliability of the mobile gas turbine combined cycle power generation unit under extreme conditions. In the power-off state where the entire power generation unit is completely de-energized, the diesel generator, relying on its independent energy supply (such as diesel reserves), can start up first and generate electricity stably, injecting initial power into the power distribution unit T5 and enabling it to quickly acquire black start capabilities. This design breaks the limitation of the traditional dependence on external grid power supply for startup, ensuring that the unit can start up autonomously without waiting for external support in the event of natural disasters, grid failures, and other emergencies that cause large-scale power outages, greatly shortening the time for the system to resume power supply and improving the emergency response efficiency.

[0082] When the entire unit is in a shutdown state, the power distribution unit T5 with black start capabilities can stably output power, providing the energy required for starting the gas turbine power generation unit T1 and smoothly initiating the entire power generation process. At the same time, relying on the electrical connection with the gas turbine power generation unit T1 and the steam turbine power generation unit T3, the power distribution unit T5 can precisely control and achieve the parallel operation of the two, enabling different power generation units to work together and ensuring the stable output of electricity. This parallel control function not only increases the overall output power of the power generation system but also enhances the stability and reliability of power supply, effectively avoiding power supply interruptions caused by single unit failures.

[0083] In addition, this black start solution enhances the environmental adaptability and application flexibility of the mobile gas turbine combined cycle power generation unit. Whether in remote areas without grid coverage or regions with weak grid infrastructure, the unit can rely on its own black start capabilities to achieve rapid startup and stable power supply, meeting diverse power demand scenarios and providing a solid and reliable power guarantee for industrial production, emergency rescue, large-scale events, etc., broadening the application scope and market competitiveness of the unit.

[0084] Based on this, the mobile gas turbine combined cycle power generation unit provided in the embodiment of this application can recover the waste heat of the gas turbine exhaust. The waste heat boiler uses the exhaust waste heat to generate steam, and electricity is generated through the steam turbine and the No. 2 generator, improving the thermal efficiency of the entire unit and having the following beneficial effects:

[0085] The mobile gas turbine combined cycle power generation unit in the embodiment of this application is in the form of a vehicle-mounted or skid-mounted unit, which can achieve the rapid assembly and transportation of the power generation unit, can utilize the gas turbine exhaust, and improve the power generation efficiency of the whole machine; an exhaust gas auxiliary device 210 is added to the waste heat boiler 202, which can reduce the volume of the waste heat boiler 202 without increasing the exhaust back pressure of the gas turbine. In addition, through the hydraulic tilting device 205 and the hydraulic system 207, the exhaust pipe 203 is laid down to Figure 5The state shown reduces the height, enabling the waste heat boiler 202 to be integrated onto a transportation vehicle or assembled into a skid-mounted device, achieving convenient mobile transportation of the waste heat boiler 202. Meanwhile, the steam turbine generator set T3 can be integrated onto a transportation vehicle or assembled into a skid-mounted device to achieve convenient transportation of the steam turbine generator set T3. Additionally, the steam discharged from the steam turbine 305 is in the form of tail exhaust (i.e., exhaust along the axial direction), and this design is more conducive to connecting with the condenser 402, reducing the exhaust back pressure, and increasing the output power of the steam turbine 305. Further, the condenser 402 realizes the condensation of steam through forced air cooling by a fan, and it can be integrated onto a transportation vehicle or assembled into a skid-mounted device to achieve convenient transportation. The power distribution unit T5 has the black start capability, can provide black start power for gas turbine power generation, and can realize the parallel operation of the gas turbine generator set T1 and the steam turbine generator set T3. (The so-called black start capability means that the entire unit is in a shutdown state, and the power distribution unit T5 can provide the power required for starting other equipment).

[0086] Specifically, referring to Figure 1 , the mobile gas turbine combined cycle power generation unit provided by the embodiment of the present application is composed of a gas turbine generator set T1, a waste heat recovery unit T2, a steam turbine generator set T3, a condenser unit T4, and a power distribution unit T5. Moreover, the gas turbine generator set T1, the waste heat recovery unit T2, the steam turbine generator set T3, the condenser unit T4, and the power distribution unit T5 are all integrally installed on a transportation vehicle or assembled into a skid-mounted device, enabling the recovery and utilization of the waste heat of the gas turbine exhaust gas and converting it into electric energy to improve the overall power generation power and energy conversion efficiency.

[0087] Exemplarily, the waste heat of the gas turbine exhaust gas is recovered by the waste heat boiler 202 to generate high-temperature and high-pressure steam. The steam enters the steam turbine 305, and the high-temperature and high-pressure steam drives the steam turbine 305 and the No. 2 generator to rotate and generate electricity. The electricity generated by the gas turbine generator set T1 and the steam turbine generator set T3 is connected to the power distribution unit to combine the electricity generated by the gas turbine generator set T1 and the steam turbine generator set T3 and output the electricity externally. The following cases will be described in detail according to the integrated installation of the gas turbine generator set T1, the waste heat recovery unit T2, the steam turbine generator set T3, the condenser unit T4, and the power distribution unit T5 on a transportation vehicle.

[0088] Further referring to Figure 1, as the core component of the gas turbine generator set T1, the gas turbine is connected to the No. 1 generator 112 through a mechanical transmission method. The mechanical energy generated by the gas turbine burning fuel drives the No. 1 generator 112 to generate electricity. At the same time, the exhaust port of the gas turbine is connected to an external pipeline for discharging exhaust gas, providing a heat source for the subsequent waste heat recovery unit T2; the high-temperature gas discharged from the gas turbine in the gas turbine generator set T1 is connected to the intake port of the waste heat boiler 202 in the waste heat recovery unit T2 through a pipeline. This pipeline usually uses high-temperature resistant materials, and components such as expansion joints are set at the connection to adapt to thermal expansion and contraction and ensure sealing, ensuring that the high-temperature gas can smoothly flow into the waste heat boiler 202 for heat recovery; the high-temperature and high-pressure steam generated by the waste heat boiler 202 through heat exchange is connected to the intake port of the steam turbine 305 in the steam turbine generator set T3 through a steam pipeline. The steam expands and does work in the steam turbine 305, driving the rotor of the steam turbine 305 to rotate; the steam turbine 305 is connected to the No. 2 generator 303 through a coupling 304, and the mechanical energy generated by the rotation of the steam turbine 305 is transmitted to the No. 2 generator 303 through the coupling 304 to achieve the power generation function. The exhaust port of the steam turbine 305 is then connected to the subsequent condensing unit T4; the exhausted steam discharged from the steam turbine 305 is transported to the condenser 402 of the condensing unit T4 through a pipeline, and this pipeline ensures that the exhausted steam can smoothly flow into the condenser 402 for cooling and condensation. At the same time, the feed water pump 403 in the condensing unit T4 is connected to the waste heat boiler 202 through a pipeline to re-transport the condensed liquid water in the condenser 402 back to the waste heat boiler 202 to form a working medium cycle; the power distribution unit T5 is electrically connected to the No. 1 generator 112 in the gas turbine generator set T1 and the No. 2 generator 303 in the steam turbine generator set T3 through power cables respectively, for collecting, regulating and distributing electric energy. In addition, the power distribution unit T5 can also be connected to an external power grid or electrical equipment through a specific line to achieve power output; in the black start scenario, the diesel generator in the power distribution unit T5 can provide starting power for the gas turbine generator set T1, and its connection line ensures that the power can be stably transmitted to the starting system of the gas turbine.

[0089] Reference Figure 2, a gas turbine generator set T1, a waste heat recovery unit T2, a steam turbine generator set T3, a condensing steam turbine unit T4, and a distribution generator set T5 are integrally installed on a transport vehicle, enabling rapid assembly and transportation of the generator sets. In the gas turbine generator set T1, the tail exhaust silencer of the gas turbine power generation vehicle is connected to the waste heat recovery unit T2. In the steam turbine generator set T3, the tail exhaust passage of the steam turbine generator set T3 is connected to the condensing steam turbine unit T4. The low-voltage cables of the gas turbine generator set T1, the waste heat recovery unit T2, the steam turbine generator set T3, and the condensing steam turbine unit T4 are connected to the distribution generator set T5 for power supply during equipment startup. The high-pressure steam and medium-pressure steam generated by the waste heat recovery unit T2 are transported to the steam turbine through the high-pressure steam pipeline and the low-pressure steam pipeline to drive the steam turbine to generate electricity. The steam discharged from the steam turbine enters the condenser for condensation, and the generated liquid water is re-transported to the waste heat boiler for recycling by the high-pressure feed water pump and the low-pressure feed water pump. The electricity generated after the gas turbine generator set T1 and the steam turbine generator set T3 are started is transported to the distribution generator set T5 for merging, and then the merged electricity is output by the distribution generator set T5.

[0090] Reference Figure 3, is the single-line diagram of the low-voltage and medium-voltage of a mobile gas turbine combined cycle power generation unit. The power generation unit is equipped with a black start generator 508, which is connected to the gas turbine power generation unit T1, the waste heat recovery unit T2, the steam turbine power generation unit T3, and the condensing steam unit T4 through the low-voltage auxiliary power cabinet 502. When the unit starts, the black start generator 508 starts first, and supplies power to the gas turbine power generation unit T1, the waste heat recovery unit T2, the steam turbine power generation unit T3, and the condensing steam unit T4 through the low-voltage auxiliary power cabinet 502. The gas turbine power generation unit T1 starts using the power supplied by the black start generator 508. The waste heat recovery unit T2, the steam turbine power generation unit T3, and the condensing steam unit T4 make preparations before starting. After the gas turbine power generation unit T1 completes the start, it outputs medium-voltage electricity to the gas turbine power generation vehicle transformer cabinet 117. The gas turbine power generation vehicle transformer cabinet 117 converts the medium-voltage electricity into low-voltage electricity and transports it to the gas turbine power generation auxiliary power cabinet 102. The synchronization device inside the gas turbine power generation auxiliary power cabinet 102 synchronizes the low-voltage electricity output by the black start generator 508 and the low-voltage electricity output by the gas turbine power generation vehicle transformer cabinet 117. After reaching synchronization, the gas turbine power generation auxiliary power cabinet 102 disconnects the low-voltage electricity output by the black start generator 508, and the low-voltage electricity required by the gas turbine power generation unit T1 is provided by itself. After the low-voltage power supply of the gas turbine power generation unit T1 completes the switchover, it transports the medium-voltage electricity to the power distribution unit T5. The medium-voltage electricity is transported to the transformer 503 and the medium-voltage paralleling cabinet 504 through the gas turbine power generation medium-voltage incoming connector 511 and the gas turbine power generation medium-voltage incoming cabinet 505. The transformer 503 converts the medium-voltage electricity into low-voltage electricity and transports it to the low-voltage auxiliary power cabinet 502. The synchronization device of the low-voltage auxiliary power cabinet 502 synchronizes the low-voltage electricity output by the black start generator 508 and the low-voltage electricity output by the transformer 503. After the two kinds of electricity are synchronized, the control system shuts off the power supply of the black start generator 508, and the low-voltage electricity of the waste heat recovery unit T2, the steam turbine power generation unit T3, and the condensing steam unit T4 is supplied by the low-voltage electricity converted from the medium-voltage electricity by the transformer 503. After the unit completes the power switchover, the medium-voltage electricity output by the gas turbine power generation unit T1 is transported to the medium-voltage electrical load through the medium-voltage paralleling cabinet 504 and the medium-voltage outgoing connector 512 of the distribution vehicle. After the gas turbine power generation unit T1 completes the start and power supply, in the waste heat recovery unit T2, the gate 201 is opened while the gas turbine power generation unit T1 closes the exhaust silencer cover 108, so that the gas turbine exhaust gas enters the waste heat boiler 202. The steam generated by the waste heat boiler 202 enters the steam turbine power generation unit, pushing the steam turbine 305 to rotate. After the steam turbine speed is adjusted to the appropriate speed through the steam turbine speed control device, the circuit breaker of the steam turbine generator 303 closes to start generating electricity. The medium-voltage electricity output by the steam turbine generator 303 is transported to the medium-voltage paralleling cabinet 504 through the steam turbine power generation outgoing cabinet 317, the steam turbine power generation medium-voltage incoming connector 510, and the steam turbine power generation medium-voltage incoming cabinet 506. The synchronization device of the medium-voltage paralleling cabinet 504 synchronizes the medium-voltage electricity output by the steam turbine generator 303 and the medium-voltage electricity output by the gas turbine power generation unit. After reaching synchronization, they are combined and output medium-voltage electricity externally through the medium-voltage outgoing connector 512 of the distribution vehicle.

[0091] Reference Figure 4 As shown in

[0091] , it is a connection diagram of a gas turbine generator set T1 and a waste heat recovery unit T2. The gas turbine generator set T1 consists of a first chassis truck 101, an auxiliary power cabinet 102 for gas turbine power generation, a gas turbine power generation cabin 103, a cabin ventilation filter 104, a generator ventilation and heat dissipation exhaust port 105, a gas turbine inlet filter 106, a gas turbine cabin ventilation exhaust port 107, an exhaust silencer cover plate 108, an exhaust silencer 109, a gas turbine 110, an intake volute 111, a coupling 112, a generator 113, a lubrication system 114, a support system 115, a gas turbine power generation outgoing line cabinet 116, and a gas turbine power generation vehicle transformer cabinet 117. The gas turbine 110 is a two-shaft or multi-shaft gas turbine, and the power of this gas turbine is output at the intake end. This structure is more conducive to the discharge of tail gas. The exhaust silencer 109 is installed with an exhaust damper 108. When the unit starts or the waste heat recovery unit is under maintenance, the exhaust silencer cover plate 108 is opened and the damper 201 is closed. The gas turbine tail gas is directly discharged through the position of the exhaust silencer cover plate 108. When the waste heat recovery unit T2 starts, the damper 201 is opened. At the same time, the damper 201 on the exhaust silencer cover plate 108 is closed, and the gas turbine tail gas enters the waste heat recovery unit to generate steam. As Figure 4 and Figure 5 shown, the waste heat recovery unit consists of a damper 201, a waste heat boiler 202, an exhaust pipe 203, a waste heat recovery vehicle chassis 204, a hydraulic tilting device 205, a support system 206, a hydraulic system 207, a diffuser pipe 208, an expansion joint 209, an exhaust auxiliary device 210, and a waste heat recovery vehicle electrical system 211. As described above, the damper 201 controls the entry of the gas turbine tail gas. The waste heat boiler 202 can generate high-pressure steam and low-pressure steam simultaneously. The exhaust auxiliary device 210 can enhance the discharge of the tail gas inside the waste heat boiler 202, reduce the exhaust back pressure of the waste heat boiler 202, and at the same time, when the back pressure is certain, it can reduce the volume of the waste heat boiler 202 and increase the internal heat exchange pipes. The exhaust pipe 203 can be flipped with the assistance of the hydraulic tilting device 205 and the hydraulic system 207, changing from the horizontal state during transportation to the vertical state, which can well reduce the height during transportation and make transportation more convenient. The support system 206 provides support for the waste heat recovery unit, making the equipment operation more stable. The diffuser pipe 208 and the expansion joint 209 are components for connecting the waste heat recovery unit T2 to the gas turbine generator set T1, which can eliminate thermal expansion. The waste heat recovery vehicle electrical system 211 provides power for the waste heat recovery unit T2 and detects the operating state of the waste heat recovery unit T2 to ensure the stable operation of the waste heat recovery unit T2.

[0092] Reference Figure 5, when the waste heat recovery unit T2 is transported, the exhaust pipe 203 can be flipped with the assistance of the hydraulic flipping device 205 and the hydraulic system 207. The exhaust pipe 203 can be laid down to reduce the height of the waste heat recovery unit T2 during transportation, making the transportation more convenient. When the equipment is in operation, as Figure 4 shown, the exhaust pipe 203 can be erected to enable the gas to be discharged upward better.

[0093] Refer to Figure 6 and Figure 7 , the steam turbine generator set consists of the steam turbine auxiliary power cabinet 301, the steam turbine generator set cabin 302, the steam turbine generator 303, the coupling 304, the steam turbine 305, the steam turbine exhaust connection pipe 306, the steam turbine generator chassis truck 307, the steam turbine generator truck lubrication system 308, the steam turbine generator truck support system 309, the generator exhaust port 310, the generator cabin door A 311, the steam turbine cabin door 312, the generator ventilation filter 313, the generator cabin maintenance port 314, and the generator cabin door B 315. As Figure 3 shown, the steam turbine auxiliary power cabinet is connected to low-voltage electricity to provide low-voltage power for the auxiliary equipment of the steam turbine generator set. The steam turbine generator set cabin 302 is divided into an electrical cabin, a generator cabin, and a steam turbine cabin, separating the electrical cabinet, the generator, and the steam turbine, providing a suitable temperature working environment for the electrical cabinet, isolating it from the external environment of wind, rain, sand, and dust, isolating the generator from the steam turbine, avoiding the influence of the heat radiation and steam leakage of the steam turbine on the generator. At the same time, the generator ventilation filter 313 in the generator cabin provides clean cooling air for the generator, and the generator exhaust port 310 discharges the air used for generator cooling to achieve the ventilation and cooling of the generator, ensuring the stable operation of the generator. The steam turbine generator 303 is connected to the steam turbine 305 through the coupling 304. The steam pushes the steam turbine 305 to rotate, driving the coupling 304 and the steam turbine generator 303 to generate electricity. The steam turbine 305 is of a tail exhaust form, and can be connected to the condenser diffusion pipe 401 through the steam turbine exhaust connection pipe 306 to make the exhaust pipe connection more convenient and the exhaust back pressure lower, enabling the steam of the steam turbine 305 to be discharged more smoothly to the condensing unit. The steam turbine generator chassis truck 307 provides support and transportation for the equipment on the waste heat recovery unit. The steam turbine generator truck lubrication system 308 provides lubrication for the steam turbine generator 303 and the steam turbine 305. The steam turbine generator truck support system 309 provides support for the steam turbine generator set, making the operation of the steam turbine generator set more stable. As Figure 3 shown, the steam turbine generator outgoing line cabinet 317 is connected to the steam turbine generator 303 and the steam turbine medium-voltage incoming line connector 510 to transmit the medium-voltage electricity generated by the steam turbine generator set T3. The condenser 402 cools and condenses the steam discharged from the steam turbine 305 into liquid water, and the liquid water is transported to the waste heat recovery unit through the feed water pump 403 to generate steam again for recycling.Figure 3 The low-voltage cable 404 is connected to the electrical system of the shown condensing vehicle to provide low-voltage power for the auxiliary equipment of the condensing steam turbine unit. The chassis vehicle 405 of the condensing vehicle provides support and transportation for the condensing steam turbine unit equipment. The condensate tank 406 collects and converges the condensate water of the condenser 402. The make-up water system 407 replenishes liquid water for the unit. The support system 408 of the condensing vehicle provides a support system for the condensing steam turbine unit to make it more stable during operation.

[0094] Reference Figure 7 , which is a schematic diagram of the external structure of the steam turbine generator unit. The steam turbine 305 is connected to the steam turbine generator 303 through the coupling 304 to achieve the transmission of mechanical energy. The exhaust port of the steam turbine is connected to the steam turbine exhaust connection pipe 306 to discharge the exhausted steam. These core equipment are placed in the cabin 302 of the steam turbine generator unit. The cabin is provided with a steam turbine cabin door 312 for convenient maintenance of the steam turbine. The generator cabin door A 311, the generator cabin door B 315, and the generator cabin inspection port 314 are used to maintain the components related to the generator. The generator exhaust port 310 and the generator ventilation filter 313 are respectively used to discharge the heat exhaust gas of the generator and for ventilation and air exchange. The cabin is supported on the steam turbine power generation chassis vehicle 307 by the steam turbine power generation vehicle support system 309. The steam turbine power generation vehicle lubrication system 308 provides lubrication for the equipment, and the steam turbine electrical cabinet 301 is also arranged at a suitable position in the cabin.

[0095] Reference Figure 8 , which is a schematic front view structure of the distribution power unit T5. The distribution power unit T5 is equipped with a black start generator 508. When the unit starts, the black start generator 508 needs to start first to provide starting power for the gas turbine generator set T1, the waste heat recovery unit T2, the steam turbine generator set T3, and the condensing steam turbine unit T4. Reference Figure 3, after the gas turbine generator set T1 starts and operates stably and outputs medium-voltage electricity, the medium-voltage electricity can be transported to the medium-voltage incoming line cabinet 505 of gas turbine power generation through the medium-voltage incoming line connector 511 of gas turbine power generation. Under the control of the control system, the circuit breaker inside the medium-voltage incoming line cabinet 505 of gas turbine power generation closes to transport the medium-voltage electricity to the transformer cabinet 503. The transformer cabinet 503 converts the medium-voltage electricity into low-voltage electricity and transports it to the low-voltage auxiliary power consumption cabinet 502. The synchronous monitoring device inside the low-voltage auxiliary power consumption cabinet 502 detects the medium-voltage electricity transported by the transformer 503, and feeds back the detection result to the generator control and protection system of the waste heat recovery unit to adjust its voltage, phase and frequency, so that the low-voltage electricity output by the transformer 503 and the low-voltage electricity output by the black start generator 508 are synchronized. After synchronization, the low-voltage auxiliary power consumption cabinet 502 closes the circuit breaker of the low-voltage electricity transported by the transformer 503 and disconnects the black start generator 508. After the black start generator 508 is disconnected, it is shut down under the control of the control system. While transporting the medium-voltage electricity to the transformer 503, the medium-voltage incoming line cabinet 505 of gas turbine power generation synchronously transports the medium-voltage electricity to the medium-voltage paralleling cabinet 504 and transports the medium-voltage electricity to the final medium-voltage power consumption load through the medium-voltage outgoing line connector 512 of the distribution vehicle. After the steam turbine generator set starts and operates stably, it transports the medium-voltage electricity output by the steam turbine generator set to the medium-voltage paralleling cabinet 504 through the medium-voltage incoming line connector 510 of steam turbine power generation and the medium-voltage incoming line cabinet 506 of steam turbine power generation. The synchronizing device of the medium-voltage paralleling cabinet 504 detects the medium-voltage electricity of the steam turbine generator set, and feeds back the detection result to the generator control and protection system of the steam turbine generator set to adjust its voltage, phase and frequency to synchronize it with the medium-voltage electricity of the gas turbine generator set. After synchronization, the medium-voltage paralleling cabinet 504 combines and outputs the medium-voltage electricity externally. When the gas turbine generator set T1 fails and shuts down, the black start generator 508 will start immediately. At the same time, the low-voltage auxiliary power consumption cabinet 502 will also be immediately connected to the black start diesel generator power supply to provide low-voltage auxiliary power for the gas turbine generator set T1, the waste heat recovery unit T2, the steam turbine generator set T3 and the condensing steam turbine unit T4, so that each device can shut down according to the shutdown procedure, troubleshoot, and still start according to the aforementioned start procedure after the problem is solved, and restart the unit to generate electricity.

[0096] The air conditioning system 501 creates a suitable temperature and humidity environment for the equipment in the distribution vehicle cabin 507 to prevent the equipment from being affected by high temperature, humidity, etc. and thus affecting its performance and lifespan. The low-voltage auxiliary power distribution cabinet 502 is responsible for distributing, controlling, and protecting the low-voltage auxiliary power, and supplies power to the low-voltage equipment in the unit, such as lighting, control systems, etc. The transformer cabinet 503 is equipped with a transformer to change the voltage level and achieve the conversion between medium voltage and low voltage to meet the power consumption requirements of different equipment. The medium-voltage paralleling cabinet 504 realizes the paralleling operation of the medium-voltage sides of the gas turbine generator and the steam turbine generator, enabling different power sources to supply power cooperatively and ensuring a stable power output. The medium-voltage incoming line cabinet 505 for gas turbine power generation receives the medium-voltage electrical energy generated by the gas turbine generator set and conducts the access, protection, and control of the electrical energy. The medium-voltage incoming line cabinet 506 for steam turbine power generation receives the medium-voltage electrical energy generated by the steam turbine generator set and conducts the access, protection, and control of the electrical energy. The distribution vehicle cabin 507 serves as an enclosure to provide physical protection for the internal electrical equipment, protecting it from external environmental factors (such as wind, rain, dust, etc.). The black start generator 508 starts first when the entire generator set is without power, providing initial power for the distribution generator set to achieve the black start function. The black start generator operation platform 509 is for operators to perform operations, maintenance, repairs, etc. on the black start generator. 510 Medium-voltage incoming line connector for steam turbine power generation: realizes the reliable connection between the medium-voltage incoming line cable for steam turbine power generation and the incoming line cabinet 506. 511 Medium-voltage incoming line connector for gas turbine power generation: realizes the reliable connection between the medium-voltage incoming line cable for gas turbine power generation and the incoming line cabinet 505. 512 Medium-voltage outgoing line connector for the distribution vehicle: is used to connect the medium-voltage outgoing line cable and transmit the medium-voltage electrical energy of the distribution vehicle to external electrical equipment or the power grid. 513 Low-voltage auxiliary power wiring box: is a wiring device for low-voltage auxiliary power lines, facilitating line connection and maintenance. 514 Distribution vehicle support system: supports the weight of the distribution vehicle cabin and the internal equipment, ensuring the stability of the distribution vehicle during operation and parking. 515 Distribution vehicle chassis: serves as the basic load-bearing structure, installs components such as wheels, and provides the moving function for the distribution vehicle. 516 Distribution vehicle material bin: is used to store materials such as tools and spare parts required for the operation and maintenance of the distribution vehicle.

[0097] The medium-voltage incoming line cabinet 505 for gas turbine power generation is connected to the gas turbine generator set through the medium-voltage incoming line connector 511 of the gas turbine power generation; the medium-voltage incoming line cabinet 506 for steam turbine power generation is connected to the steam turbine generator set through the medium-voltage incoming line connector 510 of the steam turbine power generation; after the electric energy of both is connected, parallel operation is carried out in the medium-voltage paralleling cabinet 504. The processed medium-voltage electric energy is output through the medium-voltage outgoing line connector 512 of the distribution vehicle. After the transformer cabinet 503 converts the medium voltage into low voltage, it is distributed by the low-voltage auxiliary power consumption cabinet 502 and supplies power to low-voltage equipment through the low-voltage auxiliary power consumption junction box 513. The black start generator 508 can provide initial starting power for each power consumption cabinet under specific circumstances. Each electrical cabinet is installed in the distribution vehicle cabin 507, and the cabin is supported by the distribution vehicle support system 514 and fixed on the distribution vehicle chassis 515. The air conditioning system 501 is connected to the cabin to adjust the internal environment. The black start generator 508 is installed in a suitable position and connected to related equipment through lines, and the black start generator operation platform 509 is provided accordingly. The distribution vehicle material bin 516 is connected to the chassis and used to store materials.

[0098] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0099] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly dictates otherwise, terms such as "first" and "second" and other numerical terms when used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0100] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A mobile gas turbine combined cycle power generation unit, characterized in that, Comprising: a gas turbine generator set, a waste heat recovery unit, a steam turbine generator set, and a condensing steam unit; The gas turbine generator set generates exhaust gas during the fuel combustion process; The waste heat recovery unit is connected to the exhaust port of the gas turbine generator set. The waste heat recovery unit is used to recover the exhaust gas and form high-temperature and high-pressure steam, which is transferred to the steam turbine generator set; The steam turbine is connected to the outlet of the waste heat boiler. The steam turbine generator set drives the steam turbine rotor to rotate through the high-temperature and high-pressure steam. The steam turbine generator set discharges the steam that has done work to the condensing steam unit; The condensing steam unit is used to cool the discharged steam exhaust and convey the condensed water formed by the cooling to the waste heat recovery unit; The gas turbine generator set, the waste heat recovery unit, the steam turbine generator set, and the condensing steam unit are respectively integrated in a mobile device, and are interconnected in the mobile device to form a circulating generator set.

2. The mobile gas turbine combined cycle power generation unit according to claim 1, wherein The mobile gas turbine combined cycle power generation set further includes a power distribution unit. The power distribution unit is used to receive the electric energy generated by the gas turbine generator set and / or the steam turbine generator set, and at the same time is used to supply electric energy to the condensing steam unit and the waste heat recovery unit; The power distribution unit is configured to be integrated in a mobile device and is interconnected with the gas turbine generator set, the waste heat recovery unit, the steam turbine generator set, and the condensing steam unit to form a circulating generator set.

3. The mobile gas turbine combined cycle power generation unit according to claim 1 or 2, characterized in that The mobile device includes one of a transportation vehicle or a skid-mounted device.

4. The mobile gas turbine combined cycle power generation unit according to claim 1, wherein The waste heat recovery unit includes a waste heat boiler, an exhaust gas auxiliary device, and an exhaust gas pipeline. The exhaust gas auxiliary device is installed between the waste heat boiler and the exhaust gas pipeline. The exhaust gas auxiliary device directly acts on the exhaust gas pipeline. The exhaust gas auxiliary device is configured to reduce the volume of the waste heat boiler without increasing the back pressure of the gas turbine exhaust.

5. The mobile gas turbine combined cycle power generation unit according to claim 4, characterized in that The waste heat recovery unit includes a hydraulic flipping device and a hydraulic system. The hydraulic flipping device is installed on one side of the exhaust gas pipeline. The hydraulic system is used to drive the hydraulic flipping device to rotate so as to change the longitudinal vertical orientation of the exhaust gas pipeline to a horizontal flat orientation.

6. The mobile gas turbine combined cycle power generation unit according to claim 1, characterized in that The steam turbine generator set includes a steam turbine. The steam turbine includes a steam discharge channel extending along its own axial direction. A steam turbine exhaust connection pipeline is installed at the tail of the steam discharge channel. The steam turbine is connected to the inlet of the condensing steam unit through the steam turbine exhaust connection pipeline.

7. The mobile gas turbine combined cycle power generation unit according to claim 4, characterized in that, The gas turbine generator set includes an exhaust muffler and a gate. The gate is installed on the exhaust muffler in an openable and closable manner. When the gate is in the open state, the exhaust gas is discharged from the outlet of the exhaust muffler. When the gate is in the closed state, the exhaust gas flows to the waste heat boiler and is discharged through the exhaust gas pipeline.

8. The mobile gas turbine combined cycle power generation unit according to claim 1, characterized in that, The gas channel between the gas turbine generator set and the waste heat recovery unit is connected through an expansion joint. Both sides of the expansion joint are connected to the gas turbine generator set and the waste heat recovery unit through flanges.

9. The mobile gas turbine combined cycle power generation unit according to claim 1, characterized in that, The waste heat recovery unit and the steam turbine generator set are connected through a pipeline.

10. The mobile gas turbine combined cycle power generation unit according to claim 1, wherein The condensing steam turbine unit includes a condenser, a fan, and a driving motor. The driving motor is electrically connected to the fan, and the fan is used to blow air towards the condenser.

11. The mobile gas turbine combined cycle power generation unit according to claim 2, wherein The power distribution unit includes a diesel generator. In the state where the entire power generation unit has no power, the diesel generator starts generating electricity first and provides initial power for the power distribution unit to enable the power distribution unit to have black start capability. When the entire unit is in a shutdown state, the power distribution unit can provide black start power for the gas turbine power generation unit; the power distribution unit is electrically connected to the gas turbine power generation unit and the steam turbine power generation unit respectively, and is used to realize the parallel operation of the gas turbine power generation unit and the steam turbine power generation unit.

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