Intake system of marine active protection gas turbine

Abstract

The invention relates to the technical field of ship equipment, in particular to an active protection gas turbine gas inlet system for a ship. The active protection gas turbine air inlet system for the ship comprises an air inlet chamber, an adjustable shutter, a sand dust blocking net, an anti-icing device, an adjustable filtering device, a cleaning system, an air inlet silencing device and a monitoring system. The air inlet chamber is provided with an air inlet runner; in the direction from an inlet to an outlet of the air inlet flow channel, the adjustable shutter, the containing part and the air inlet silencing device are sequentially arranged in the air inlet flow channel, and the sand dust blocking net, the anti-icing device and the adjustable filtering device are sequentially arranged in the containing part. The anti-icing device can be connected with a high-pressure compressor of the gas turbine; the connecting pipeline is configured to be capable of providing fresh water and high-pressure air to complete cleaning operation; an outlet of the air inlet silencing device is connected with an air inlet channel of the gas turbine. Therefore, the purpose of active protection can be achieved, and safe and efficient operation of the marine gas turbine is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of ship equipment, and in particular to an active protection gas turbine air intake system for a ship. Background Art

[0002] Gas turbines have the advantages of high power density, strong maneuverability, low vibration and noise, and long life. They are ideal power equipment for large and medium-sized surface ships and high-performance ships in various countries around the world. Gas turbines have a large air intake flow rate, and they need to face a complex marine environment when used on ships: the marine environment has high humidity; the air intake may face severe spray splashing under high sea conditions; the marine air contains a high concentration of salt spray aerosols; and some offshore waters may have sandstorms. If protective measures are not taken, these factors will have an adverse effect on the gas turbine, which may reduce the efficiency of the engine at the least, or even cause the engine to be directly scrapped. Therefore, the intake air flow must be filtered.

[0003] Normally, the following methods can be used to achieve the purpose: One method is to use cabin air intake. This method does not have a special air intake chamber, but uses the deflection of the intake air flow inside the cabin to naturally settle the salt spray aerosol in the intake air flow. One method is to use a special gas turbine air intake device. The existing air intake device is composed of adjustable shutters, an air intake filter device, an air intake silencer device, etc. The adjustable shutters can be opened / closed, and the intake air flow enters the gas turbine after passing through the fixed air intake filter device and the open air intake filter device. The air intake filter device also acts as a bypass door. In an emergency, it can be opened to allow part of the gas to enter the gas turbine directly without being filtered, thereby preventing damage to the gas turbine caused by excessive negative pressure. See Figure 1 .

[0004] However, the existing gas turbine air intake device is in a fixed technical state after installation, and can only play a passive protection role. After the environment changes, especially when the environment becomes harsh, it is difficult to meet the special protection requirements caused by environmental changes; at the same time, the existing equipment filter device is used as a bypass as a whole. Once opened, the intake air flow is not filtered at all, and the mixed substances may cause great damage to the gas turbine. If a special bypass door is set, the precious intake area of ​​the intake chamber will be wasted, resulting in an increase in intake resistance. Summary of the invention

[0005] The objects of the present invention include, for example, providing a marine active protection gas turbine air intake system, which can actively adjust the windward angle of the air intake louvers, sand prevention nets, air intake filter devices and other equipment to achieve the purpose of active protection and ensure the safe and efficient operation of the marine gas turbine.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, the present invention provides a marine active protection gas turbine intake system, which cooperates with a gas turbine and comprises:

[0008] Air intake chamber, adjustable shutters, sand and dust barriers, anti-icing devices, adjustable filtration devices, cleaning systems, air intake silencers and monitoring systems;

[0009] The air intake chamber has an air intake passage; the cleaning system includes a first cleaning pipe, a second cleaning pipe, and a connecting pipe; the first cleaning pipe, the second cleaning pipe, and the connecting pipe are enclosed together to form a receiving portion; from the inlet to the outlet direction of the air intake passage, the adjustable shutter, the receiving portion, and the air intake silencer are sequentially arranged in the air intake passage, and the sand and dust barrier, the anti-icing device, and the adjustable filter are sequentially arranged in the receiving portion; the first cleaning pipe has a first nozzle facing the adjustable shutter, and the second cleaning pipe has a second nozzle facing the adjustable filter;

[0010] The anti-icing device can be connected to the high-pressure compressor of the gas turbine; the connecting pipeline is configured to provide fresh water and high-pressure air to complete the cleaning operation; the outlet of the air intake silencer is connected to the air intake duct of the gas turbine;

[0011] The adjustable shutters, the sand and dust barrier, the anti-icing device, the adjustable filtering device, the cleaning system, and the air intake silencer are all electrically connected to the monitoring system.

[0012] In an optional embodiment, from the inlet to the outlet direction of the intake air passage, the first cleaning pipe, the connecting pipe, and the second cleaning pipe are sequentially arranged in the intake air passage; the first cleaning pipe and the second cleaning pipe are arranged opposite to each other, and the two ends of the connecting pipe are respectively connected to the first cleaning pipe and the second cleaning pipe, so that the first cleaning pipe, the second cleaning pipe, and the connecting pipe enclose a receiving portion;

[0013] The adjustable shutter is opposite to a side of the first cleaning pipe away from the accommodating portion, and the adjustable filtering device is opposite to a side of the second cleaning pipe toward the accommodating portion.

[0014] In an optional embodiment, the anti-icing device includes an air bleed pipe, a manual stop valve, an adjustable stop valve, an anti-icing manifold, and an anti-icing nozzle;

[0015] The inlet of the bleed air duct can be connected to the high-pressure compressor of the gas turbine, and the outlet of the bleed air duct can be connected to the anti-icing header; the anti-icing header is provided with the anti-icing nozzle facing the adjustable filtering device, and the opening direction of the anti-icing nozzle is arranged along the direction from the inlet to the outlet of the intake air passage;

[0016] In the direction from the high-pressure compressor to the anti-icing header, the manual stop valve and the adjustable stop valve are arranged in sequence on the bleed air duct.

[0017] In an optional embodiment, the adjustable filtration device includes a condensation filtration stage, a protection stage, an inertial filtration stage, an electric push rod, a drain tank, and a water collection tank;

[0018] From the inlet to the outlet of the intake air passage, the condensation filter stage, the protection stage, and the inertial filter stage are arranged in sequence, and the condensation filter stage faces the anti-icing device, and the inertial filter stage faces the second cleaning pipe; the second nozzle is located above the condensation filter stage and the inertial filter stage;

[0019] The electric push rod is connected to the condensation and filtration stage to open and close the condensation and filtration stage;

[0020] The drain tank is located at the lower part of the adjustable filtering device and is used to collect separated foreign matter and droplets; the drain tank is connected to the water collecting tank through a drain pipe.

[0021] In an optional embodiment, the coalescence filtration stage is a metal mesh made of metal wires with a diameter of 0.05-0.1 mm.

[0022] In an optional embodiment, the coalescence filtration stage is made by 3D printing.

[0023] In an optional embodiment, the protection layer is a metal mesh, and the thickness of the protection layer is 1 mm.

[0024] In an optional embodiment, the mesh size of the protection-grade metal mesh is 5 mm.

[0025] In an optional embodiment, the monitoring system includes a monitoring station, a remote control box, a junction box, a temperature sensor array, a pressure sensor array, a sand and dust sensor array, a salt spray sensor array, and an acoustic sensor array, all of which are arranged in the intake air duct;

[0026] The temperature sensor array, the pressure sensor array, the sand and dust sensor array, the salt spray sensor array, and the sound sensor array transmit the detected data to the monitoring station through the junction box and the remote control box respectively; the monitoring station processes and fits the above data to obtain the temperature field, aerodynamic field and sound field data in the intake airflow, as well as the sand and dust and salt spray data in the intake airflow.

[0027] In an optional embodiment, the monitoring station includes a display unit, a control unit, a display and control computer, a console power module and a station body;

[0028] The display unit, the control unit, the display and control computer, and the console power module are all arranged on the platform body; the display unit and the control unit are both electrically connected to the display and control computer, and the console power module is respectively connected to the display unit and the control unit and the display and control computer.

[0029] The beneficial effects of the embodiments of the present invention include, for example:

[0030] The marine active protection gas turbine air intake system of this scheme includes an air intake chamber, adjustable shutters, sand and dust barriers, anti-icing devices, adjustable filtering devices, cleaning systems, air intake silencers and monitoring systems. The adjustable shutters, sand and dust barriers, anti-icing devices, adjustable filtering devices, cleaning systems and air intake silencers are arranged in the air intake flow passage of the air intake chamber. The monitoring system measures the air intake parameters such as air intake resistance, air intake temperature, air intake salt spray concentration and air intake particle size, and obtains the overall air intake airflow and the working status of the air intake system through algorithms. According to different air intake conditions, the windward angle of the air intake shutters, sand prevention nets, air intake filtering devices and other equipment are actively adjusted to achieve the purpose of active protection and ensure the safe and efficient operation of the marine gas turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 This is a schematic structural diagram of a marine active protection gas turbine air intake system according to an embodiment of the present invention;

[0033] Figure 2 This is a control principle diagram of a monitoring system for a marine active protection gas turbine intake system according to an embodiment of the present invention.

[0034] Icons: 1-adjustable shutter; 2-sand and dust barrier; 3-anti-icing device; 31-bleed air duct; 32-manual stop valve; 33-adjustable stop valve; 34-anti-icing header; 35-anti-icing nozzle; 4-adjustable filter device; 41-coagulation filter stage; 42-protection stage; 43-inertial filter stage; 44-electric push rod; 5-cleaning system; 51-first cleaning pipe; 52-first nozzle; 53-second cleaning pipe; 54-second nozzle; 55-connecting pipeline; 6-intake silencer; 7-monitoring station; 8-remote control box; 9-junction box; 10-temperature sensor array; 11-pressure sensor array; 12-sand and dust sensor array; 13-salt spray sensor array; 14-acoustic sensor array; 200-intake chamber; 210-intake air duct; 220-housing part; 300-gas turbine. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0040] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0041] Please refer to Figure 1 The present embodiment provides an air intake system for a marine active protection gas turbine 300, which cooperates with the gas turbine 300 and includes an air intake chamber 200, an adjustable shutter 1, a sand and dust barrier 2, an anti-icing device 3, an adjustable filtering device 4, a cleaning system 5, an air intake silencer 6 and a monitoring system.

[0042] The air intake chamber 200 has an air intake passage 210; the cleaning system 5 includes a first cleaning pipe 51, a second cleaning pipe 53, and a connecting pipe 55; the first cleaning pipe 51, the second cleaning pipe 53, and the connecting pipe 55 are enclosed together to form a receiving portion 220; from the inlet to the outlet direction of the air intake passage 210, the adjustable shutter 1, the receiving portion 220, and the air intake silencer 6 are sequentially arranged in the air intake passage 210, and the sand and dust blocking net 2, the anti-icing device 3, and the adjustable filter device 4 are sequentially arranged in the receiving portion 220; the first cleaning pipe 51 has a first nozzle 52 facing the adjustable shutter 1, and the second cleaning pipe 53 has a second nozzle 54 facing the adjustable filter device 4;

[0043] The anti-icing device 3 can be connected to the high-pressure compressor of the gas turbine 300; the connecting pipeline 55 is configured to provide fresh water and high-pressure air to complete the cleaning operation; the outlet of the intake silencer 6 is connected to the intake duct of the gas turbine 300;

[0044] The adjustable shutter 1, the sand and dust barrier 2, the anti-icing device 3, the adjustable filtering device 4, the cleaning system 5, and the air intake silencer 6 are all electrically connected to the monitoring system.

[0045] The monitoring system of the air intake system of the marine active protection gas turbine 300 of this scheme measures the air intake parameters such as air intake resistance, air intake temperature, air intake salt spray concentration, air intake particle size, etc., obtains the overall air intake airflow and the working status of the air intake system through an algorithm, and actively adjusts the windward angle of the air intake louvers, sand prevention nets, air intake filters and other equipment according to different air intake conditions to achieve the purpose of active protection and ensure the safe and efficient operation of the marine gas turbine 300.

[0046] It can also be seen from the figure that the adjustable shutter 1 is located at the front end of the air intake system. It is composed of streamlined adjustable blades, a frame and a rotating mechanism. It uses the inertia principle to filter out impurities, seawater and rainwater in the intake air, reduce the water removal load of the intake filter device, and protect the internal devices of the system from damage due to external reasons. The adjustable shutter 1 can change the blade angle according to environmental changes to adjust its front-end filtering capacity. The sand and dust blocking net 2 is located at the rear end of the adjustable shutter 1. It is usually in a retracted state. When the external environment deteriorates and it is necessary to remove larger sand and dust and seawater droplets in the intake airflow, it is extended to block sand and dust and seawater droplets passing through the shutter.

[0047] Optionally, from the inlet to the outlet of the intake air duct 210, the first clean pipe 51, the connecting pipe 55, and the second clean pipe 53 are arranged in sequence in the intake air duct 210; the first clean pipe 51 and the second clean pipe 53 are arranged opposite to each other, and the two ends of the connecting pipe 55 are respectively connected to the first clean pipe 51 and the second clean pipe 53, so that the first clean pipe 51, the second clean pipe 53, and the connecting pipe 55 enclose a accommodating portion 220; the adjustable shutter 1 is opposite to the side of the first clean pipe 51 away from the accommodating portion 220, and the adjustable filtering device 4 is opposite to the side of the second clean pipe 53 toward the accommodating portion 220.

[0048] Further, optionally, the anti-icing device 3 comprises an air bleed pipe 31, a manual stop valve 32, an adjustable stop valve 33, an anti-icing header 34, and an anti-icing nozzle 35; the inlet of the air bleed pipe 31 can be connected to the high-pressure compressor of the gas turbine 300, and the outlet of the air bleed pipe 31 can be connected to the anti-icing header 34; the anti-icing header 34 is provided with an anti-icing nozzle 35 facing the adjustable filter device 4, and the opening direction of the anti-icing nozzle 35 is arranged along the direction from the inlet to the outlet of the intake air passage 210; from the high-pressure compressor to the anti-icing header 34, the manual stop valve 32 and the adjustable stop valve 33 are arranged in sequence on the air bleed pipe 31. When in use, high-temperature and high-pressure gas is introduced from the high-pressure compressor of the gas turbine 300, and is mixed with the intake air flow through the manual valve, the adjustable stop valve 33, the anti-icing header 34, and the nozzle in sequence to increase the intake air flow temperature and prevent the intake air flow from freezing. The adjustable stop valve 33 is controlled by the host computer. The opening parameter of the adjustable stop valve 33 is determined by an algorithm based on parameters such as the intake air flow rate, intake air flow velocity, intake air temperature, intake air humidity, etc., to control the bleed air flow rate.

[0049] Optionally, the adjustable filtering device 4 includes a condensation filter stage 41, a protection stage 42, an inertial filter stage 43, an electric push rod 44, a drain tank, and a water collecting tank; from the inlet to the outlet of the intake air duct 210, the condensation filter stage 41, the protection stage 42, and the inertial filter stage 43 are arranged in sequence, and the condensation filter stage 41 faces the anti-icing device 3, and the inertial filter stage 43 faces the second cleaning pipe 53; the second nozzle 54 is located above the condensation filter stage 41 and the inertial filter stage 43; the electric push rod 44 is connected to the condensation filter stage 41 for opening and closing the condensation filter stage 41; the drain tank is located at the lower part of the adjustable filtering device 4, for collecting separated foreign matter and droplets; the drain tank is connected to the water collecting tank through a drain pipe.

[0050] Optionally, the condensation filter stage 41 is a metal mesh made of metal wire with a diameter of 0.05-0.1 mm. Further, the condensation filter stage 41 is made by 3D printing. The condensation filter stage 41 separates and condenses solid and liquid impurities in the intake air flow through the diffusion principle.

[0051] Optionally, the protection level 42 is a metal mesh, and the thickness of the protection level 42 is 1 mm. Further, the mesh size of the metal mesh of the protection level 42 is 5 mm. The protection level 42 is a square metal mesh with a mesh size of 5 mm. The protection level 42 is used to block larger sharp objects in the intake air, especially after the condensation filter stage 41 is opened, to prevent larger foreign objects from entering the interior and causing accidents.

[0052] The inertial filter stage 43 is located behind the protection stage 42 and is composed of a streamlined grid. It removes impurities from the intake air flow passing through the condensation filter stage through the inertial principle.

[0053] Furthermore, the second nozzle 54 is located above the condensation filter stage 41 and the inertial filter stage 43, and is used for daily cleaning of the filter device. The adjustable filter device 4 also includes a cleaning joint, which is located above / on the side of the filter device. One end of the cleaning joint is connected to the connecting pipe 55, and the other end of the cleaning joint is connected to the onboard cleaning system pipe system to provide the cleaning nozzle with cleaning fresh water and high-pressure air.

[0054] The air intake device cleaning system also includes a cleaning valve, which is at least arranged on the first cleaning pipe and the second cleaning pipe. The air intake device cleaning system is used to perform daily cleaning on the adjustable shutter 1 and the adjustable filter device 4. The cleaning valve is controlled by the host computer, and can be opened and closed according to the pneumatic sensor and the sand and dust sensor for cleaning, and daily scheduled cleaning can also be set on the host computer.

[0055] The air intake silencer 6 is located after the adjustable filter device 4, and is composed of a silencer cylinder and a silencer element, and is used to eliminate the aerodynamic noise of the gas turbine 300. The silencer element can be removed independently, so that the silencer cylinder forms a complete channel, which is convenient for the removal and installation of the gas turbine 300 after the guide rail is installed.

[0056] See also Figure 1 and Figure 2 , it can be seen from the figure that the monitoring system includes a monitoring station 7, a remote control box 8, a junction box 9, a temperature sensor array 10, a pressure sensor array 11, a sand and dust sensor array 12, a salt spray sensor array 13, and an acoustic sensor array 14, all of which are arranged in the intake air duct 210;

[0057] The temperature sensor array 10, the pressure sensor array 11, the sand and dust sensor array 12, the salt spray sensor array 13, and the sound sensor array 14 transmit the detected data to the monitoring station 7 through the junction box 9 and the remote control box 8 respectively; the monitoring station 7 processes and fits the above data to obtain the temperature field, aerodynamic field and sound field data in the intake air duct 210, as well as the sand and dust and salt spray data in the intake airflow.

[0058] Optionally, the monitoring station 7 includes a display unit, a control unit, a display and control computer, a console power module and a station body; the display unit, the control unit, the display and control computer, and the console power module are all arranged on the station body; the display unit and the control unit are both electrically connected to the display and control computer, and the console power module is respectively connected to the display unit and the control unit and the display and control computer.

[0059] Optionally, the monitoring station 7 adopts a standardized control console, which is composed of a display unit, a control unit, a display and control computer, a control console power module and a station body.

[0060] The display unit displays relevant data detected by the temperature sensor array 10, the pressure sensor array 11, the dust sensor array 12, the salt spray sensor array 13, and the sound sensor array 14. The reinforced computer uses an algorithm to derive the temperature field, aerodynamic field, dust distribution field, salt spray field, and sound field of the air intake device, and displays them graphically to determine the overall environmental parameters of the air intake system; it displays the working status of the adjustable shutter 1, the dust barrier net 2, the anti-icing device 3, the adjustable filtering device 4, the air intake device cleaning system 5, and the air intake silencer 6.

[0061] The control unit is used to operate the entire system. Different buttons on the panel control the blade angle 1 of the adjustable shutter 1, control the opening / closing of the sand and dust barrier 2, control the opening / closing and opening control of the valve of the anti-icing device 3, control the opening / closing of the condensation and filtration stage 41 of the adjustable filtering device 4, and control the opening / closing of the cleaning system.

[0062] The display and control computer is used to process the signals from the remote control box 8 and the control unit, perform signal conversion, process network signals, store relevant information, etc. The power module converts the external 220V power supply to the display unit, the control unit, and the display and control computer.

[0063] The remote control box 8 uses standardized hardware and has different modules inside, which are used to provide power to different sensors. At the same time, the analog signals of the sensors are processed and transmitted to the monitoring station 7, and the signals from the monitoring station 7 are processed and transmitted to various devices, thereby controlling the actions of various devices.

[0064] The junction box 9 is used to organize the cables of each sensor array, and then connect to the remote control box 8 to transmit the sensor signal to the remote control box 8; at the same time, it also transmits the control signal from the remote control box 8 to each control element, so that the monitoring station 7 can monitor and control each device.

[0065] The temperature sensor array 10, the pressure sensor array 11, the dust sensor array 12, the salt spray sensor array 13, and the acoustic sensor array 14 are arranged at different parts of the intake system to measure the temperature, pressure, dust, salt spray, and noise at different positions. After the data is transmitted to the monitoring station 7, the overall environmental parameters in the intake system are obtained through a specific algorithm, and based on this, active protection of the intake airflow is performed to ensure the reliable operation of the power system.

[0066] The specific implementation is as follows:

[0067] 1) Inspection before use: check that the equipment is firmly installed, the equipment appearance is intact, the air inlet duct 210 is not blocked or blocked, turn on the remote control box 8 and the monitoring station 7, and all data are normal;

[0068] 2) The gas turbine 300 is started, and the air intake system of the gas turbine 300 operates normally, removing impurities and salt mist aerosols in the intake air flow, and providing high-quality intake air flow for use by the gas turbine 300;

[0069] 3) The temperature sensor array 10, the pressure sensor array 11, the sand and dust sensor array 12, the salt spray sensor array 13, and the acoustic sensor array 14 transmit the detected data to the monitoring station 7 through the junction box 9 and the remote control box 8, and obtain the temperature field, aerodynamic field and acoustic field data in the intake air duct 210, as well as the sand and dust and salt spray data in the intake airflow through data processing and fitting;

[0070] 4) Intake protection. Under the negative pressure generated by the operation of the gas turbine 300 compressor, the intake airflow first passes through the adjustable shutter 1. As the airflow is affected by the geometric shape of the blades, its flow rate and direction change, generating inertial centrifugal force and Coriolis acceleration, which promotes the separation of suspended particles in the air from the air. After that, the intake airflow passes through the intake airflow duct 210. Under the action of gravity, the particles with higher density in the intake airflow naturally settle and are further separated from the air. The intake airflow will flow through the adjustable filter device 4. When the airflow flows through the condensation filter stage 41, the particles are deposited inside the condensation filter under the action of turbulent pulsation, inertia and adhesion generated when contacting the surface of the condensation filter stage 41, thereby separating the particles from the intake airflow. After some liquid particles gradually merge and grow in the condensation stage, they reach the inertial filter stage 43 together with the airflow under the action of the airflow, and are further separated from the air under the action of inertial force. The airflow after the adjustable filter device 4 finally turns 90 degrees in the air intake chamber 200, and then enters the air intake duct of the gas turbine 300 below after being rectified by the air intake silencer 6 on the deck below;

[0071] 5) Low temperature protection. When the intake air flow temperature is lower than the set value, the low temperature protection is turned on. At this time, the monitoring station 7 issues a command to open the adjustable stop valve 33 of the anti-icing device 3, so that the high-temperature gas in the compressor of the gas turbine 300 is mixed with the intake air flow through the manual valve, the adjustable stop valve 33, the anti-icing manifold 34, and the nozzle in turn, thereby increasing the intake air flow temperature and preventing the intake air flow from freezing. The monitoring station 7 determines the opening parameters of the adjustable stop valve 33 through an algorithm based on the engine operating conditions, intake temperature, intake air flow velocity, intake air humidity and other parameters, and controls the bleed air flow to achieve the best anti-icing effect; (There should be two types of air flow temperature sensors, one is to measure the air flow temperature after mixing, and the other is to measure the ambient intake temperature. When the measured air flow temperature after mixing reaches the set value, the heating state is maintained; when the ambient temperature reaches the set value, the anti-icing heating is gradually stopped.)

[0072] 6) Dust protection. When the dust sensor detects that the dust concentration is higher than the set value, the dust protection is turned on. The monitoring station 7 issues a command to adjust the blade angle of the adjustable shutter 1, and at the same time opens the dust barrier 2 at the rear of the adjustable shutter 1 to block the dust. The monitoring station 7 determines the blade angle parameters of the adjustable shutter 1 through an algorithm based on the turbine operating conditions, intake air flow rate, intake dust concentration, intake resistance and other parameters, and controls the opening of the dust barrier 2 to achieve the best sand removal effect;

[0073] 7) Over-resistance protection. When the pressure sensor array 11 detects that the intake resistance is close to the warning value, the over-resistance warning is turned on. At this time, the monitoring station 7 issues an instruction to turn on the cleaning system 5 in combination with the working condition of the gas turbine 300 to clean and reduce the resistance of the intake system. When the pressure sensor array 11 detects that the intake resistance is greater than the maximum value allowed by the intake system, the over-resistance protection is turned on. The monitoring station 7 issues an instruction to turn on the mesh pad level of the adjustable filter device 4 under the action of the electric push rod 44 to reduce the intake resistance and protect the gas turbine 300 from damage.

[0074] In summary, the embodiment of the present invention provides an air intake system for a marine active protection gas turbine 300, which has at least the following advantages:

[0075] 1. Using a temperature sensor array 10, a pressure sensor array 11, a sand and dust sensor array 12, a salt spray sensor array 13, and an acoustic sensor array 14 for detection, the working state of the intake system of the gas turbine 300 is reflected in multiple dimensions;

[0076] 2. Array detection is used to replace single-point detection. Through multi-point algorithm fitting, the temperature field of the entire flow channel, the flow field of the intake air flow, and the noise field are obtained, reflecting the working state of the intake system in the entire airspace and time domain inside the intake chamber 200;

[0077] 3. Combine the fitting algorithm to judge the working status of each component of the gas turbine 300 intake system, and realize multi-level active protection against high sea conditions, dust weather, and cold sea conditions through the monitoring system in conjunction with the adjustable shutter 1, the sand and dust barrier 2, the anti-icing device 3, the adjustable filter device 4, the cleaning system 5, the intake silencer 6, etc., to achieve the prediction and multi-level active protection against high intake resistance, and realize active maintenance of the intake system;

[0078] 4. The bypass function is realized by adopting the front opening form of the mesh pad stage, and a protection stage 42 is arranged at the rear. After the mesh pad stage is opened, it can still block impurities from entering the air intake chamber 200, preventing foreign objects from entering and causing irreversible damage to the gas turbine 300.

[0079] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A marine active protection gas turbine intake system, which cooperates with a gas turbine, is characterized by: include: Air intake chamber, adjustable shutters, sand and dust barriers, anti-icing devices, adjustable filtration devices, cleaning systems, air intake silencers and monitoring systems; The air intake chamber has an air intake passage; the cleaning system includes a first cleaning pipe, a second cleaning pipe, and a connecting pipe; the first cleaning pipe, the second cleaning pipe, and the connecting pipe are enclosed together to form a receiving portion; from the inlet to the outlet direction of the air intake passage, the adjustable shutter, the receiving portion, and the air intake silencer are sequentially arranged in the air intake passage, and the sand and dust barrier, the anti-icing device, and the adjustable filter are sequentially arranged in the receiving portion; the first cleaning pipe has a first nozzle facing the adjustable shutter, and the second cleaning pipe has a second nozzle facing the adjustable filter; The anti-icing device can be connected to the high-pressure compressor of the gas turbine; the connecting pipeline is configured to provide fresh water and high-pressure air to complete the cleaning operation; the outlet of the air intake silencer is connected to the air intake duct of the gas turbine; The adjustable shutters, the sand and dust barrier, the anti-icing device, the adjustable filtering device, the cleaning system, and the air intake silencer are all electrically connected to the monitoring system.

2. The active protection gas turbine air intake system for a ship according to claim 1, characterized in that: From the inlet to the outlet of the intake air passage, the first cleaning pipe, the connecting pipe, and the second cleaning pipe are sequentially arranged in the intake air passage; the first cleaning pipe and the second cleaning pipe are arranged opposite to each other, and the two ends of the connecting pipe are respectively connected to the first cleaning pipe and the second cleaning pipe, so that the first cleaning pipe, the second cleaning pipe, and the connecting pipe are enclosed to form a receiving portion; The adjustable shutter is opposite to a side of the first cleaning pipe away from the accommodating portion, and the adjustable filtering device is opposite to a side of the second cleaning pipe toward the accommodating portion.

3. The active protection gas turbine air intake system for a ship according to claim 1, characterized in that: The anti-icing device comprises an air bleed pipe, a manual stop valve, an adjustable stop valve, an anti-icing header, and an anti-icing nozzle; The inlet of the bleed air duct can be connected to the high-pressure compressor of the gas turbine, and the outlet of the bleed air duct can be connected to the anti-icing header; the anti-icing header is provided with the anti-icing nozzle facing the adjustable filtering device, and the opening direction of the anti-icing nozzle is arranged along the direction from the inlet to the outlet of the intake air passage; In the direction from the high-pressure compressor to the anti-icing header, the manual stop valve and the adjustable stop valve are arranged in sequence on the bleed air duct.

4. The active protection gas turbine air intake system for a ship according to claim 1, characterized in that: The adjustable filtering device includes a condensation filtering stage, a protection stage, an inertial filtering stage, an electric push rod, a drain tank, and a water collecting tank; From the inlet to the outlet of the intake air passage, the condensation filter stage, the protection stage, and the inertial filter stage are arranged in sequence, and the condensation filter stage faces the anti-icing device, and the inertial filter stage faces the second cleaning pipe; the second nozzle is located above the condensation filter stage and the inertial filter stage; The electric push rod is connected to the condensation and filtration stage to open and close the condensation and filtration stage; The drain tank is located at the lower part of the adjustable filtering device and is used to collect separated foreign matter and droplets; the drain tank is connected to the water collecting tank through a drain pipe.

5. The active protection gas turbine air intake system for a ship according to claim 4, characterized in that: The condensation filtration stage is a metal mesh made of metal wire with a diameter of 0.05-0.1 mm.

6. The active protection gas turbine air intake system for a ship according to claim 5, characterized in that: The condensation and filtration stage is made by 3D printing.

7. The active protection gas turbine air intake system for a ship according to claim 4, characterized in that: The protection layer is a metal mesh, and the thickness of the protection layer is 1 mm.

8. The active protection gas turbine air intake system for a ship according to claim 7, characterized in that: The mesh size of the protection-grade metal mesh is 5 mm.

9. The active protection gas turbine air intake system for a ship according to claim 1, characterized in that: The monitoring system includes a monitoring station, a remote control box, a junction box, a temperature sensor array, a pressure sensor array, a sand and dust sensor array, a salt spray sensor array, and an acoustic sensor array, all of which are arranged in the intake air duct; The temperature sensor array, the pressure sensor array, the sand and dust sensor array, the salt spray sensor array, and the sound sensor array transmit the detected data to the monitoring station through the junction box and the remote control box respectively; the monitoring station processes and fits the above data to obtain the temperature field, aerodynamic field and sound field data in the intake airflow duct, as well as the sand and dust and salt spray data in the intake airflow.

10. The active protection gas turbine air intake system for a ship according to claim 9, characterized in that: The monitoring station includes a display unit, a control unit, a display and control computer, a control console power module and a station body; The display unit, the control unit, the display and control computer, and the console power module are all arranged on the platform body; the display unit and the control unit are both electrically connected to the display and control computer, and the console power module is respectively connected to the display unit and the control unit and the display and control computer.

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