• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention includes systems and methods for monitoring corrosive contaminants associated with liquid fuel. The method includes monitoring corrosive contaminants associated with liquid fuel in a gas turbine fuel supply system using one or more linear polarization resistance sensors for on-line real-time corrosion measurement of liquid fuels disposed in the fuel supply system at least partially based on monitoring predictions of a cumulative level of corrosion of one or more hot gas path components associated with a gas turbine and outputting information associated with the monitoring.
    公开号:CH703493B1
    申请号:CH01232/11
    申请日:2011-07-22
    公开日:2016-11-30
    发明作者:Joseph Martin Paul
    申请人:Gen Electric；
    IPC主号:
    专利说明:

    Field of the invention
    This invention relates generally to the monitoring and predicting of the corrosivity of liquid fuel for use in gas turbines.
    Background of the invention
    Certain fuel contaminants can accelerate corrosion in components associated with a gas turbine. Liquid fuels used for combustion in gas turbines typically include distillates and ash-containing hydrocarbon-based fuels. Contaminants may be present in the fuel and cause deterioration of tanks, pipes, valves, alloy coatings, and other components associated with the supply of fuel and the operation of the gas turbine. Salt water, sulfur, sodium, vanadium, potassium, calcium, lead, etc. may act alone or in combination to cause corrosion. For example, oxides of sulfur and vanadium may react with other impurities to form sulfates and vanadates which are corrosive at high temperatures.
    The presence of contaminants in fuel typically can damage protective oxide layers on the surface of gas turbine components, such as burners, transition pieces, turbine blades, and other components in the hot gas path (HGP). Further, contaminants in the compressor inlet air, injected steam and water can significantly contribute to corrosion. Excessive corrosion can lead to failure of components, resulting in replacement of important turbine components, costly repairs, and significant time during which the engine is shut down. Small amounts of certain corrosive elements (one part per million or more) in the fuel are enough to cause heat corrosion.
    Detecting and quantifying the full amount of liquid fuel contaminants in their elemental form based on continuous on-line real time is technologically challenging and has been accomplished by transforming laboratory scaled-to-outdoor equipment, including X-ray fluorescence (XRF), pulsed neutron activation analysis (PNAA), atomic disk atomic emission spectroscopy (RDE-AES), paramagnetic electron resonance (EPR), and inductively coupled plasma (ICP). The leading technology for this type of measurement is XRF, for which various vendors have delivered online real-time systems that are capable of measuring liquid fuels based on hydrocarbons, with the primary focus being on measuring sulfur in refinery fuel of diesel fuel with ultra low sulfur. These on-line XRF systems may be able to detect heavy metal contaminants (vanadium and lead) up to levels of single parts per million, but these XRF systems do not seem to be able to handle the lighter metals (sodium, potassium or calcium) at low levels.
    The object underlying the present invention is therefore to provide a method and a system which monitor and predict the full amount of contaminants in liquid fuel in their elemental form based on continuous online real time.
    Brief summary of the invention
    Some or all of the above problems are solved by the present invention. The invention relates to systems and methods for monitoring corrosive contaminants associated with liquid fuel.
    According to the present invention, a method of monitoring, predicting and preferably preventing corrosion is provided. The method includes monitoring corrosive impurities associated with liquid fuel in a gas turbine fuel supply system using one or more linear polarization resistance (LPR) sensors for on-line real-time corrosion measurement of liquid fuels contained in the fuel supply system The predictions are based, at least in part, on monitoring a cumulative level of corrosion of one or more hot gas path components connected to a gas turbine and outputting information associated with the monitoring.
    In accordance with the present invention, a system for monitoring and predicting corrosion is provided. The system includes a gas turbine, at least one fuel supply line for delivering liquid fuel to the gas turbine, one or more linear polarization resistance (LPR) sensors for on-line real-time corrosion measurement of liquid fuels in conjunction with the at least one fuel supply line, at least one reservoir for storing data and computer-executable instructions and at least one processor for carrying out the method according to claim 1.
    The one or more components include at least one of a liquid fuel tank, liquid fuel tube, and hot gas path components connected to the gas turbine.
    These and other features, aspects, and advantages of the present invention will become better understood when the following detailed description is read with reference to the accompanying drawings.
    Brief description of the drawings
    Reference is now made to the accompanying Tables and Drawings, which are not necessarily drawn to scale and in which:<Tb> FIG. 1 <SEP> is a block diagram of an illustrative system for monitoring and predicting corrosion in accordance with an exemplary embodiment of the invention;<Tb> FIG. 2 <SEP> is a flowchart of an example method according to an exemplary embodiment of the invention.
    Detailed description of the invention
    The present invention will be described more fully hereinafter with reference to the accompanying drawings. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are intended to provide a thorough and complete disclosure and will help one skilled in the art to appreciate the scope of the invention. Like reference numerals refer to like elements throughout. Certain embodiments of the invention may enable measurement of corrosivity in liquid fuels of gas turbines.
    The invention includes on-line real-time corrosion measurements of liquid fuels of gas turbines, for example, to determine, record and report the associated heat corrosion that may occur after hot-gas combustion (HGP) components of the hot gas path (HGP). In accordance with an exemplary embodiment of the invention, linear polarization resistance (LPR) corrosion sensors are employed to monitor liquid fuel in tubes that supply the fuel to the combustors of the gas turbine. Certain embodiments of the invention use LPR sensor corrosion rates and electrode material properties to determine the corrosivity of the gas turbine fuel. The information from the LPR sensors may be used in conjunction with information obtained from water sensors, density sensors and / or viscosity sensors to characterize and detect changes related to the presence of corrosive contaminants in the fuel. This corrosiveness information can be used to determine the cumulative HGP corrosion damage that occurs due to fuel combustion.
    In the present invention, the LPR sensors use multiple electrodes in direct contact with the liquid. The LPR electrodes may include consumable electrode material that is matched to the tube or gas turbine material such that the corrosion degradation over time, as caused by the corrosivity of the fuel, may be correlated with the excitation and degradation of the electrode material. The LPR sensors may measure a general corrosion rate, a localized pitting corrosion corrosion rate, and / or other parameters related to corrosion measurement. Thus, e.g. Harmonic Distortion or Star-Geary constant measurements are used to determine the integrity of the sensor signals.
    According to the invention, LPR sensors are used in the liquid fuel of the gas turbine to measure specific corrosive compounds (e.g., salt water primarily composed of sodium) which, when burned, could cause heat corrosion in the HGP. According to an exemplary embodiment, monitoring and determining the trend of corrosivity through the various LPR sensor corrosion rates may be used to develop transfer functions that relate the fuel corrosivity to the accumulated heat corrosion in the HGP of the gas turbine. Several LPR sensors using different electrode materials can be used to characterize and detect the corrosive elements of interest.
    Certain exemplary embodiments of the invention may include one or more of the following objects: (1) identifying the proper LPR sensor electrode material for interaction with the liquid fuel contaminants that cause heat corrosion; (2) placing the LPR sensor in place and in the correct orientation within the liquid fuel stream to ensure that the electrode material interacts with the contaminants; (3) determining the corrosivity of the liquid fuel based on LPR sensor measurements; (4) predicting the downstream impact of fuel corrosivity on HGP heat corrosion; (5) recording and trend estimating the predicted heat corrosion to determine the cumulative effect on the HGP; and (6) justifying maintenance factors and HGP component lifetime determinations based on measurements. In certain exemplary embodiments of the invention, corrosion inhibitors are injected into the fuel supply lines in response to the LPR measurements.
    According to the invention, various sensors, fuel supply lines, regulators and processors for monitoring, predicting and detecting corrosion can be used and will now be described with reference to the accompanying figures.
    FIG. 1 is a block diagram of an exemplary system 100 for monitoring and predicting corrosion according to an exemplary embodiment of the invention. The system 100 may include a controller 102 that may include a memory 104, one or more processors 106, one or more input / output interfaces 108, and / or one or more network interfaces 110. According to exemplary embodiments, the memory 104 may include an operating system (OS) 112 and data 114. The memory 104 may also include computer-executable modules for processing input and data. Thus, e.g. the memory 104 includes a prediction module 116, a trend module 118, and a remedial module 120.
    In the present invention, the system 100 may include one or more sensors 122 in communication with fuel supplied to a gas turbine 126 (through one or more fuel supply lines 124). Certain embodiments of the invention may include a fuel supply sensor 130 in the tank in communication with fuel stored, for example, in a fuel tank 128. For example, the system 100 may include one or more corrosion inhibiting injectors 132 for delivering corrosion inhibitors into the fuel lines 124. In certain example embodiments, the corrosion inhibitor may be controllably delivered, at least in part, to the fuel lines 124 in response to measurements by the sensors 122, 130 or by control signals provided by the remedial module 120.
    For example, a controller 102 may receive sensor measurement information from the sensors 122, 130 and provide prediction or trend information that may be used to maintain maintenance schedules 134 for the turbine 126, fuel supply lines 124, tank 128, and / or other components connected to the gas turbine, set up or modify. Certain embodiments of the invention may include auxiliary inputs and / or outputs 136 for communicating with operators or additional equipment.
    In the invention, the sensors 122, 130 may be used to monitor corrosion or corrosion contaminants associated with liquid fuel in a gas turbine fuel supply system. According to an example embodiment, a prediction module 116 may be operated to predict a cumulative level of corrosion or total corrosion level in the one or more components associated with a gas turbine, based at least in part on the monitoring. In accordance with exemplary embodiments of the invention, information associated with monitoring, prediction, and / or trending may be output and used by the operator, or may be used in maintenance schedules 134 or to control the corrosion inhibitor injectors 132. The example embodiments may predict the prediction of the overall degree of corrosion and the estimation of a remaining life associated with the one or more components associated with the gas turbine 126. At least a portion of the information associated with the monitoring is stored and a corrosive event trend is determined based on at least a portion of the stored information. An overall degree of corrosion in the one or more components associated with a gas turbine is predicted, at least in part, based on the monitoring.
    In the present invention, corrosion or corrosive contaminants associated with liquid fuel are monitored or measured using one or more linear polarization resistance (LPR) sensors. According to the exemplary embodiments, one or more sensors may include consuming electrodes. In an exemplary embodiment of the invention, measurement information associated with monitoring may be stored in the memory 104, and at least a portion of the information may be used to determine a corrosive event or trend based on at least a portion of the measurement information.
    According to the exemplary embodiments, the one or more processors 106 connected to the system 100 are configured to have access to the memory 104, and are further configured to provide the computer-executable instructions for monitoring corrosion and corrosive Contaminants associated with the liquid fuel by means of the one or more sensors 122, 130 perform. For example, the unclaimed prediction module 116 may use for predicting a total degree of corrosion in the one or more components connected to the gas turbine 126 based at least in part on the monitoring and outputting a signal associated with the monitoring. Exemplary embodiments are also configured to estimate a remaining life associated with the one or more components.
    FIG. 2 is a flowchart of an exemplary method for monitoring and predicting fluid fuel corrosivity according to an exemplary embodiment of the invention. FIG. The method 200 begins at block 202 and includes monitoring of corrosive impurities associated with liquid fuel in a gas turbine fuel supply system using one or more linear polarization resistance (LPR) sensors included in the fuel delivery system are arranged. At block 204 and in accordance with an example embodiment, the method 200 includes the at least partially monitoring-based prediction of a total degree of corrosion in the one or more components connected to a gas turbine. In block 206, method 200 includes outputting information associated with the monitoring. The method 200 ends after block 206.
    Accordingly, the invention provides the technical effects of creating certain systems and methods that monitor gas turbine fuel to provide corrosion information. Exemplary embodiments of the invention may further provide, based on corrosion measurements, the technical effects of predicting lifetimes of components associated with a gas turbine engine. Exemplary embodiments of the invention may provide the further technical effects of mitigating or minimizing damage to gas turbine components by injecting one or more corrosion inhibitors into the fuel lines when corrosive contamination has been detected. Exemplary embodiments of the invention may provide further technical effects of modifying maintenance schedules for the gas turbine components based on the overall corrosion, predictions, and / or trends associated with the measurement of corrosion.
    For example, the system 100 may include any number of hardware and / or software applications that are executed to facilitate any of the operations. In exemplary embodiments, one or more input / output (I / O) interfaces may facilitate communication between the corrosion display system 100 and one or more input / output devices. Thus, e.g. a universal row bus bar opening, a row opening, a floppy disk drive, a CD-ROM drive and / or one or more user interface devices such as screen, keyboard, pillow, mouse, control panel, touch screen, microphone, etc., the interaction of the user with the corrosion Display system 100 easier. The one or more I / O interfaces may be used to receive or collect data and / or user instructions from a wide variety of input devices. Received data may be processed by one or more computer processors, as desired in various embodiments of the invention, and / or stored in one or more memory devices.
    One or more network interfaces may facilitate the connection of the inputs and outputs of the system 100 with one or more suitable networks and / or connections; e.g. the connections that facilitate communication with any number of sensors connected to the system. The one or more network interfaces may further facilitate connection to one or more suitable networks, e.g. a local area network, a wide area network, the Internet, a cellular network, a radio frequency network, a Bluetooth ™ (the Telefonaktiebolaget LM Ericsson) network, a shared Wi-Si ™ (the Wi-Fi Alliance) network, a satellite-based network, any wired network, any wireless network, etc. for communication with external devices and / or systems. As desired, embodiments of the invention may include the corrosion indicating system 100 with more or less of the components illustrated in FIG.
    The invention is described above with reference to block and flow diagrams of the systems and methods according to exemplary embodiments of the invention. It should be understood that one or more blocks of the block diagrams and flow diagrams, and combinations thereof, may be executed by computer executable program instructions. Likewise, according to the invention, some steps (blocks) of the block diagrams and flowcharts do not necessarily have to be performed in the order given, or they may be omitted altogether.
    These computer-executable program instructions may be loaded onto a general-purpose computer, a special purpose computer, a processor or other programmable data processing device to generate a particular machine such that the instructions stored on the computer, processor or other programmable data processing devices, generate means for performing one or more functions specified in the flowchart block or blocks. These computer program instructions may also be stored in a computer-readable memory that directs a computer or other programmable computing device to function in a specific manner such that the instructions stored in the computer-readable memory produce a manufactured article including instruction means perform one or more functions specified in the flowchart block or blocks. As an example, embodiments of the invention may provide a computer program product comprising a computer usable medium having computer readable program code or program instructions embodied therein, wherein the computer readable program code is adapted to be executed to perform one or more functions included in that computer program Flowchart block or blocks are specified. The computer program instructions may also be loaded onto a computer or other programmable computing device to cause a series of operational elements or levels to be executed on the computer or other programmable device to generate a computer-executed process such that: the instructions executed on the computer or other programmable device provide elements or stages for performing the functions specified in the flowchart block or blocks.
    Blocks of block diagrams and flow diagrams accordingly support combinations of means for executing the specified functions, combinations of elements or stages for executing the specified functions, and program instruction means for performing the specified functions. It should also be understood that each block of block diagrams and flowcharts and combinations of blocks in the block diagrams and flowcharts may be executed by hardware-based special purpose computer systems or combinations of special purpose hardware and computer instructions that perform the specified functions, elements or stages.
    While the invention has been described in conjunction with what is presently considered to be the most practical and various embodiments, it is to be understood that the invention is not limited to the disclosed embodiments but, on the contrary, is intended to cover various modifications and equivalent arrangements are included within the scope of the appended claims. Although specific terms have been used herein, they are used in a generic and descriptive sense only and not for the purpose of limitation.
    This specification uses examples to disclose the invention, including the best mode, and also to enable those skilled in the art to practice the invention, including making and using any devices or systems, and performing any inherent procedures. The patentable scope of the invention is defined in the claims.
    The invention includes systems and methods for monitoring corrosive contaminants associated with liquid fuel. The method includes monitoring corrosive contaminants associated with liquid fuel in a gas turbine fuel supply system using one or more linear polarization resistance sensors disposed in the fuel supply system, the at least partially predictive forecasts of a gas turbine cumulative levels of corrosion of one or more hot gas path components associated with a gas turbine and outputting information associated with monitoring.
    LIST OF REFERENCE NUMBERS
    [0034]<Tb> 100 <September> Korrosivitäts display system<Tb> 102 <September> Controller<Tb> 104 <September> Memory<Tb> 106 <September> processor (s)<Tb> 108 <September> In / Out interface (s)<Tb> 110 <September> Network Interface (s)<Tb> 112 <September> Operating system<Tb> 114 <September> Data<Tb> 116 <September> corrosion prediction module (s)<Tb> 118 <September> corrosion trend module (s)<Tb> 120 <September> Remedy module (s)<Tb> 122 <September> Sensors<Tb> 124 <September> fuel supply line<Tb> 126 <September> Gas Turbine<Tb> 128 <September> fuel supply tank<Tb> 130 <September> fuel supply sensor<Tb> 132 <September> Korrosionsinhibitions injector<Tb> 134 <September> maintenance schedule<Tb> 136 <September> Auxiliary inputs / outputs<Tb> 200 <September> Process Flow Chart<Tb> 202 <September> Block<Tb> 204 <September> Block<Tb> 206 <September> Block
    权利要求:
    Claims (9)
    [1]
    A method of monitoring, predicting and preferably preventing corrosion, comprising:monitoring corrosive contaminants associated with liquid fuel in a gas turbine fuel supply system using one or more linear polarization resistance (LPR) sensors for on-line real-time corrosion measurement of liquid fuels disposed in the fuel supply system;the at least partially monitoring based prediction of a cumulative level of corrosion of one or more hot gas path, HGB components associated with a gas turbine, andoutputting information associated with monitoring.
    [2]
    2. The method of claim 1, wherein predicting the cumulative level of corrosion comprises estimating a remaining life associated with the one or more HGB components.
    [3]
    3. The method of claim 1, further comprising performing at least in part on monitoring performing preventive maintenance on the one or more HGB components associated with the gas turbine.
    [4]
    4. The method of claim 1, further comprising at least partially monitoring based injection of one or more corrosion inhibitors into the fuel delivery system.
    [5]
    5. The method of claim 1, wherein the monitoring comprises performing on-line measurements, continuous measurements and / or on-the-spot measurements.
    [6]
    6. The method of claim 1, wherein the monitoring includes measuring corrosive contaminants by the liquid fuel using one or more additional sensors, the one or more additional sensors including at least one sensor selected from the group consisting of linear polarization resistors. LPR) sensors, consumable electrodes, water sensors, density sensors and viscosity sensors.
    [7]
    The method of claim 1, further comprising storing at least a portion of the information associated with the monitoring and at least partially determining the stored information based on determining a corrosive event trend.
    [8]
    8. System comprising:a gas turbine (126),at least one fuel supply line (124) configured to deliver liquid fuel to the gas turbine (126),one or more linear polarization resistance (LPR) sensors (122) for online real-time corrosion measurement of liquid fuels associated with the at least one fuel supply line (124),at least one memory (104) configured to store data (114) and computer-executable instructions, andat least one processor (106) adapted to access the at least one memory (104) and further configured to carry out the method of claim 1, wherein the one or more components comprise at least one of a liquid fuel tank, a liquid fuel tank, and Tube and components contained in the hot gas path associated with the gas turbine (126).
    [9]
    The system of claim 8, further comprising a fuel supply tank (128) and one or more fuel supply sensors (130) disposed therein for monitoring corrosive contaminants associated with the liquid fuel in the fuel supply tank (128) the one or more fuel supply sensors comprise a sensor selectable from the group consisting of linear polarization resistance (LPR) sensors, consumable electrodes, water sensors, density sensors, and viscosity sensors.
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    JP5960957B2|2016-08-02|
    US20120023894A1|2012-02-02|
    JP2012031858A|2012-02-16|
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    法律状态:
    2017-03-15| NV| New agent|Representative=s name: GENERAL ELECTRIC TECHNOLOGY GMBH GLOBAL PATENT, CH |
    2021-02-26| PL| Patent ceased|
    优先权:
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    US12/844,947|US8589087B2|2010-07-28|2010-07-28|Systems, methods, and apparatus for monitoring corrosion or corrosive contaminants associated with liquid fuel|
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