CN110959076A - Method and device for cleaning gas compressor and gas compressor - Google Patents
Method and device for cleaning gas compressor and gas compressor Download PDFInfo
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- CN110959076A CN110959076A CN201880049645.0A CN201880049645A CN110959076A CN 110959076 A CN110959076 A CN 110959076A CN 201880049645 A CN201880049645 A CN 201880049645A CN 110959076 A CN110959076 A CN 110959076A
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- coke
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/002—Cleaning of turbomachines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/30—Preventing corrosion or unwanted deposits in gas-swept spaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2210/00—Working fluids
- F05D2210/10—Kind or type
- F05D2210/12—Kind or type gaseous, i.e. compressible
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
In a method and an apparatus for cleaning a gas compressor and the gas compressor, when an axial flow type gas compressor (31) for compressing fuel gas (F) is operated, coke (K) is injected into the gas compressor from a gas inlet by pressurized nitrogen gas to clean blades.
Description
Technical Field
The present invention relates to a method and an apparatus for cleaning a gas compressor for compressing a gas such as a fuel gas or air, and a gas compressor provided with the cleaning apparatus for the gas compressor.
Background
A typical gas turbine is constituted by a compressor, a combustor, and a turbine. The compressor compresses air introduced from the air inlet to generate high-temperature and high-pressure compressed air. The combustor supplies fuel to the compressed air and burns the compressed air to obtain high-temperature and high-pressure combustion gas. The turbine is driven by the combustion gas, thereby driving a generator coupled on the same shaft.
In this Gas turbine, there is a case where Blast Furnace Gas (BFG) is supplied to the combustor as fuel, and the Blast Furnace Gas is converted into high-temperature and high-pressure fuel Gas by a Gas compressor and supplied to the combustor. The blast furnace gas is produced when iron ore is reduced in a blast furnace to produce pig iron, and contains impurities such as tar, and when the gas compressor compresses the blast furnace gas, the blades are contaminated by the impurities, and the performance is lowered.
As a method for solving this problem, it is conceivable to insert a cleaning material into the compressor during operation and remove impurities adhering to the blades by the cleaning material. As a method for cleaning such a gas compressor, for example, a method described in patent document 1 below is known. In the method for cleaning a gas compressor described in patent document 1, rice grains, nut shells (crushed grains of walnut shells), or ice grains are fed into the compressor as a cleaning material to remove impurities adhering to the blades.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. H07-269302
Disclosure of Invention
Problems to be solved by the invention
Rice grains and nut shells used as cleaning materials are natural materials and thus are difficult to obtain, and there is a problem that the material cost for the cleaning materials is high. In addition, when using ice particles as a cleaning material, it is necessary to prepare ice particles in advance, and a manufacturing apparatus for ice particles needs to be installed adjacent to the gas compressor. Therefore, the equipment cost is increased, and the installation space is required.
An object of the present invention is to solve the above problems and to provide a method and an apparatus for cleaning a gas compressor, and a gas compressor, in which the compressor is appropriately cleaned and an increase in material cost is suppressed.
Means for solving the problems
In order to achieve the above object, a method for cleaning a gas compressor according to the present invention is characterized in that, when an axial compressor for compressing gas is operated, a porous cleaning material having an adjusted shape is fed from a gas inlet to clean a blade.
Therefore, when the rotor blades of the compressor are rotated, the cleaning material is thrown into the interior from the gas inlet, and the cleaning material collides with the surfaces of the rotor blades and the stator blades, and the deposits are removed, thereby cleaning the blades. Since the cleaning material is porous with an adjusted form, the deposits can be effectively removed without damaging the movable blades and the stationary blades, and the compressor can be appropriately cleaned.
In the method for cleaning a gas compressor according to the present invention, the cleaning material is set to a predetermined hardness and/or a predetermined particle diameter.
Therefore, the cleaning material having an appropriate hardness and/or particle diameter is fed into the blade from the gas inlet in accordance with the deposits on the blade, and the deposits can be appropriately removed while suppressing damage to the blade.
In the method for cleaning a gas compressor according to the present invention, the hardness and/or the particle diameter of the cleaning material is changed to an optimum predetermined hardness and/or predetermined particle diameter according to the adhesion state of the adhesion matter to the blade.
Therefore, since the deposit on the blade is an impurity contained in the compressed gas and has a property different depending on the type of the impurity, the hardness and/or particle diameter of the cleaning material is changed to the optimum predetermined hardness and/or predetermined particle diameter depending on the state of deposit on the blade, and the deposit on the blade can be effectively removed.
In the method for cleaning a gas compressor according to the present invention, the cleaning material is coke.
Therefore, since the hardness of the coke as the cleaning material can be adjusted, no adverse effect is caused at the place where the compressed gas is used.
In the method for cleaning a gas compressor according to the present invention, when the performance of the compressor is reduced to a predetermined performance or less, the cleaning material is charged from the gas inlet.
Therefore, if there is an attachment on the blade of the compressor, the compression efficiency is lowered and the performance is lowered, and therefore, if the performance of the compressor is lowered, the input of the cleaning material from the gas inlet port is started, and the cleaning timing can be appropriately grasped and the blade can be cleaned at an optimum timing.
In the method for cleaning a gas compressor according to the present invention, the cleaning material is introduced from the gas inlet by pressurized inert gas.
Therefore, by pressurizing the inert gas, mixing the pressurized inert gas with the cleaning material, and introducing the mixture from the gas inlet, the cleaning material can be introduced from the gas inlet into the interior in a short time, and workability can be improved.
Further, a cleaning device for a gas compressor according to the present invention is a cleaning device for cleaning a blade when an axial compressor for compressing a gas is operated, the cleaning device comprising: a hopper for storing the porous cleaning material with the adjusted shape; a supply line for supplying the cleaning material stored in the hopper to a gas inlet; and an on-off valve provided in the supply line.
Therefore, when the movable blade of the compressor is rotated, the cleaning material stored in the hopper is supplied from the supply line to the gas inlet port with the opening/closing valve opened in the cleaning period, and the cleaning material collides with the surfaces of the movable blade and the stationary blade, and the deposits are removed, whereby the blade is cleaned. Since the cleaning material is porous with an adjusted form, the deposits can be effectively removed without damaging the movable blades and the stationary blades, and the compressor can be appropriately cleaned.
In the cleaning device for a gas compressor according to the present invention, the cleaning device for a gas compressor includes: a pressurizing and mixing chamber that temporarily stores the cleaning material supplied from the hopper through the supply line and can supply an inert gas to pressurize the cleaning material; and a mixture supply line for supplying the mixture of the cleaning material and the inert gas in the pressurized mixing chamber to the gas inlet.
Therefore, when the cleaning material stored in the hopper is supplied to the pressure mixing chamber, the inactive gas is supplied and pressurized in a state where the cleaning material is temporarily stored in the pressure mixing chamber, and the cleaning material is supplied from the pressurized inactive gas to the gas inlet through the mixture supply line, so that the cleaning material can be fed from the gas inlet into the inside in a short time, and the workability can be improved.
In addition, the gas compressor according to the present invention is characterized in that the gas compressor is provided with a cleaning device for the gas compressor.
Therefore, when the gas compressor is operated, the blades are cleaned by the cleaning device of the gas compressor, and a significant reduction in compression efficiency can be suppressed.
Effects of the invention
According to the gas compressor cleaning method and apparatus and the gas compressor of the present invention, the compressor can be properly cleaned, and an increase in material cost can be suppressed.
Drawings
Fig. 1 is a schematic configuration diagram showing a combined cycle plant to which a cleaning apparatus of a gas compressor according to the present embodiment is applied.
Detailed Description
Hereinafter, preferred embodiments of a method and an apparatus for cleaning a gas compressor and a gas compressor according to the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiment, and when there are a plurality of embodiments, the present invention also includes a combination of the embodiments.
Fig. 1 is a schematic configuration diagram showing a combined cycle plant to which a cleaning apparatus of a gas compressor according to the present embodiment is applied.
In the present embodiment, as shown in fig. 1, a combined cycle plant 10 includes a gas turbine 11, a Heat Recovery Steam Generator (HRSG)12, a steam turbine 13, and a generator 14. In the combined cycle plant 10, the gas turbine 11 is formed as a single shaft type in which a rotating shaft is arranged on a straight line with a rotating shaft of the steam turbine 13 and the generator 14 is connected to the rotating shaft.
The gas turbine 11 includes a compressor 21, a combustor 22, and a turbine 23, and the compressor 21 and the turbine 23 are connected to each other by a rotor (rotary shaft) 24 so as to be integrally rotatable. The compressor 21 compresses air a introduced from the air introduction line L1 through the air introduction port, and the filter 25 is provided in the air introduction line L1. The combustor 22 mixes and burns the compressed air AC supplied from the compressor 21 through the compressed air supply line L2 with the fuel gas F (compressed fuel gas FC) supplied from the fuel gas supply line L3. The turbine 23 is driven to rotate by the combustion gas FG supplied from the combustor 22 through the combustion gas supply line L4.
The exhaust heat recovery boiler 12 generates steam (superheated steam) S due to exhaust heat of the exhaust gas EG discharged from the gas turbine 11 (turbine 23) through the exhaust gas discharge line L5. Although not shown, the exhaust heat recovery boiler 12 includes a superheater, an evaporator, and a economizer as a heat exchanger. In the heat recovery boiler 12, the exhaust gas EG from the gas turbine 11 passes through the inside thereof, and heat recovery is performed in the order of a superheater, an evaporator, and a economizer to generate steam S. The exhaust heat recovery boiler 12 is connected to the stack 26 via an exhaust gas discharge line L6 through which the exhaust gas EG used to generate the steam S is discharged.
The steam turbine 13 is driven by the steam S generated by the exhaust heat recovery boiler 12. The steam turbine 13 includes a turbine 27, and a rotary shaft 28 is linearly connected to the rotor 24 of the gas turbine 11. Further, a steam supply line L7 is provided for supplying superheated steam of the superheater of the exhaust heat recovery boiler 12 to the turbine 27, a steam recovery line L8 is provided for returning used steam S that has driven the turbine 27 to the reheater of the exhaust heat recovery boiler 12, and a condenser 29 and a condensate pump 30 are provided in the steam recovery line L8. The condenser 29 cools the steam S discharged from the turbine 27 with cooling water (e.g., seawater) to form condensed water W.
The gas turbine 11 compresses Blast Furnace Gas (BFG) discharged from a blast furnace (not shown) as fuel gas F and supplies the compressed gas to the combustor 22. The gas compressor 31 that compresses BFG as the fuel gas F is an axial flow compressor, and has a turbine 32, and a driven gear 34 is fixed to an end of a rotating shaft 33. A drive gear 35 is fixed to an end of the rotating shaft 28 of the turbine 27 of the steam turbine 13, and the drive gear 35 meshes with the driven gear 34. Therefore, when the turbine 27 of the steam turbine 13 is driven, the rotational force is transmitted from the rotary shaft 28 to the rotary shaft 33 via the drive gear 35 and the driven gear 34, and the turbine 32 of the gas compressor 31 is driven to rotate.
A fuel gas supply line L11 for supplying BFG as the fuel gas F is connected to the gas inlet of the gas compressor 31. The fuel gas supply line L11 is provided with an on-off valve 36 and an electric dust collector 37, and the electric dust collector 37 collects and removes dust and the like contained in the fuel gas F. The nitrogen gas supply line L12 supplies nitrogen gas (N) as an inert gas2) Is supplied to the pressurizing and mixing chamber 38, and is provided with an on-off valve 39. The cleaning material supply line L13 supplies the coke K stored in the hopper 40 as a cleaning material to the pressure mixing chamber 38, and is provided with an on-off valve 41. The pressurizing and mixing chamber 38 is pressurized to a predetermined pressure by supplying a predetermined amount of coke K and a predetermined amount of nitrogen gas. The pressure mixing chamber 38 is connected to a mixture supply line L14 that supplies a mixture of the coke K and the nitrogen gas from the fuel gas supply line L11 to the gas inlet of the gas compressor 31. The mixture supply line L14 is provided with an opening and closing valve 42.
The mixture supply line L14 may be directly connected to the gas inlet of the gas compressor 31, not to the fuel gas supply line L11. Although not shown, the fuel gas supply line L3 is provided with a fuel gas return line for returning a part of the compressed fuel gas FC compressed by the gas compressor 31 to the fuel gas supply line L11 as excess gas. The fuel gas return line is provided with a bypass valve and a gas cooler. The gas cooler cools the surplus gas (a part of the compressed fuel gas FC).
Therefore, when the combined cycle plant 10 is operated, in the gas turbine 11, the compressor 21 compresses the air a, and the combustor 22 mixes and burns the supplied compressed air AC with the compressed fuel gas FC. At this time, the gas compressor 31 compresses BFG as the fuel gas F to generate a compressed fuel gas FC, and supplies the compressed fuel gas FC to the combustor 22. The turbine 23 is driven to rotate by the combustion gas FG supplied from the combustor 22. The exhaust gas EG discharged from the gas turbine 11 (turbine 23) is sent to the heat recovery boiler 12, the heat recovery boiler 12 generates steam (superheated steam) S, and the steam S is sent to the steam turbine 13. The turbine 27 is driven to rotate by the steam S. In the generator 14, the gas turbine 11 and the steam turbine 13 rotate the rotor 24 and the rotary shaft 28 to generate electric power.
The combined cycle apparatus 10 of the present embodiment is installed in a steel plant. Therefore, BFG is used as the fuel gas F. A steel plant reduces iron ore with a blast furnace to produce pig iron, at which point BFG is produced. The gas compressor 31 compresses the generated BFG to generate compressed fuel gas FC, and supplies the compressed fuel gas FC to the combustor 22. However, BFG as the fuel gas F contains impurities such as tar, and when the gas compressor 31 compresses the BFG, the BFG is at a high temperature, and therefore the impurities are precipitated and deposited as impurities on the blades and vanes, and the performance of the gas compressor 31 is degraded. Therefore, it is necessary to periodically remove the deposits adhering to the blades and vanes by using a cleaning device.
In the cleaning device for a gas compressor according to the present embodiment, when the axial flow type gas compressor 31 for BFG compression of the fuel gas F is operated, the cleaning of the blades and the vanes is performed. In the cleaning device for a gas compressor according to the present embodiment, a porous material capable of being burnt and capable of adjusting hardness and particle size as its form is used as a cleaning material for cleaning the movable blade and the stationary blade. In the present embodiment, coke K is used as a cleaning material. The cleaning device for the gas compressor comprises: a hopper 40 for storing the coke K; a cleaning material supply line L13 and a mixture supply line L14 that supply the coke K stored in the hopper 40 to a gas inlet of the gas compressor 31; and on-off valves 41 and 42 provided in the supply lines L13 and L14, respectively.
The cleaning device for a gas compressor of the present embodiment is provided with the pressurizing and mixing chamber 38 so that the mixture of the coke K and the nitrogen gas in the pressurizing and mixing chamber 38 is supplied to the gas inlet of the gas compressor 31 through the mixture supply line L14, and the pressurizing and mixing chamber 38 temporarily stores the coke K supplied from the hopper 40 through the cleaning material supply line L13 and can be pressurized by supplying the nitrogen gas.
In a steel plant, iron ore, coke K and limestone, which are raw materials, are charged into a blast furnace. Then, in the blast furnace, the coke K is burned to have a high temperature, and carbon monoxide is generated and rises in the furnace. At this time, the iron ore is melted to become molten iron, and is reduced by carbon monoxide to produce pig iron. The coke K has a high calorific value, and thus the coke K is required to raise the temperature in the blast furnace. In addition, since the coke K emits heat in the blast furnace and burns while generating carbon black, the generated carbon black functions as a reducing agent that adsorbs oxygen of the oxidized iron ore, and impurities contained in the iron ore can be removed.
When the gas compressor 31 is operated, the cleaning device of the gas compressor of the present embodiment injects the coke K from the gas inlet to clean the blades. At this time, the coke K is set to a predetermined hardness or a predetermined particle diameter. That is, the hardness or particle diameter of the coke K is changed to an optimum predetermined hardness or predetermined particle diameter according to the state of adhesion of the deposits to the blades.
Coke K is produced by dry steaming coal in a furnace of a steel mill. The coke K is porous and has a hardness and a particle diameter selected according to the application. In the present embodiment, the hardness and particle diameter of the coke K are selected to be optimum according to the type and amount of the deposit on the blade. The higher the hardness or the larger the particle diameter of the coke K, the higher the removal performance of the deposit from the blade, but if the removal performance is too high, there is a risk that the blade is damaged or damaged. On the other hand, if the coke K has a low hardness or a small particle diameter, damage or damage to the blade is suppressed, but the removal performance is too low to sufficiently remove the deposit on the blade or the removal time is significantly prolonged.
The hardness of the standard coke K is about 2.5 to 3 in terms of Mohs hardness, and is changed according to the type and amount of deposits on the blade. The standard coke K has a particle diameter of about 1mm to 1.4mm, and the particle diameter of the coke K is changed according to the type and amount of deposits on the blade.
Therefore, when the combined cycle plant 10 is operated, the gas compressor 31 compresses BFG as the fuel gas F to the compressed fuel gas FC, and supplies the compressed fuel gas FC to the combustor 22 of the gas turbine 11. At this time, when the performance of the gas compressor 31 is reduced to a predetermined performance or less, the cleaning device of the gas compressor is operated to start the charging of the coke K from the inlet of the gas compressor 31. In this case, the coke K having the optimum hardness and the optimum particle diameter is stored in the hopper 40 in advance according to the state of adhesion of the deposit on the blade (the type and amount of deposit). In this case, a plurality of hoppers may be provided, and the hoppers may be switched to be used by storing cokes K having different hardness and particle size in advance in each hopper.
That is, the opening/closing valve 41 is opened to supply the coke K stored in the hopper 40 to the pressure mixing chamber 38 through the cleaning material supply line L13 by a predetermined amount, and then the opening/closing valve 41 is closed. Further, the opening/closing valve 39 is opened to supply nitrogen gas to the pressure mixing chamber 38 through the nitrogen gas supply line L12 by a predetermined amount. Here, the pressurizing and mixing chamber 38 is pressurized to a predetermined pressure by nitrogen gas. When the pressure mixing chamber 38 is pressurized to a predetermined pressure, the on-off valve 39 is closed. Then, the opening/closing valve 42 is opened to supply a predetermined amount of the coke K located in the pressurizing/mixing chamber 38 from the high-pressure nitrogen gas to the gas inlet of the gas compressor 31 through the mixture supply line L14.
When the movable blades of the gas compressor 31 rotate, the coke K injected from the gas inlet into the interior collides with the surfaces of the movable blades and the stationary blades to remove the deposits, thereby cleaning the blades. The coke K used for cleaning is supplied to the combustor 22 by the gas compressor 31 as it is, and burned by the combustion gas of the combustor 22.
In this way, in the method of cleaning the gas compressor of the present embodiment, when the axial flow type gas compressor 31 for compressing the fuel gas F is operated, the cleaning material (for example, coke K) which is porous and burnable is injected from the gas inlet to clean the blades.
Therefore, when the movable blades of the gas compressor 31 are rotated, if the coke K is thrown into the interior from the gas inlet, the coke K collides with the surfaces of the movable blades and the stationary blades, and the deposits are removed, thereby cleaning the blades. Since the coke K is porous, the deposits can be effectively removed without damaging the movable blades and the stationary blades, and the removed deposits can be attached to the coke K and discharged to the outside, whereby the gas compressor 31 can be appropriately cleaned. In addition, since the coke K can be burned, no adverse effect is caused in the place where the compressed gas is used. When the coke K is used as a cleaning material, the coke K is present in a large amount in a steel mill or the like, and therefore, the coke K is excellent in the availability and does not need to be purchased at high cost, and the increase in the material cost and the material acquisition cost can be suppressed.
In the method for cleaning a gas compressor according to the present embodiment, the coke K is set to a predetermined hardness and/or a predetermined particle diameter. Therefore, the coke K having an appropriate hardness and/or particle diameter is fed from the gas inlet into the blade according to the deposits on the blade, and the deposits can be appropriately removed while suppressing damage to the blade.
In the cleaning method of the gas compressor of the present embodiment, the hardness and/or the particle diameter of the coke K are changed to the optimum predetermined hardness and/or predetermined particle diameter according to the adhesion state of the deposits on the blade. Therefore, since the deposits on the blades are impurities contained in the compressed gas and have different properties depending on the type of the impurities, the hardness and/or particle diameter of the coke K can be changed to an optimum predetermined hardness and/or predetermined particle diameter depending on the state of the deposits, thereby effectively removing the deposits from the blades.
In the method of cleaning the gas compressor of the present embodiment, when the performance of the gas compressor 31 is reduced to a predetermined performance or less, the coke K is charged from the gas inlet. Therefore, since the compression efficiency is lowered and the performance is lowered when the vane of the gas compressor 31 has the deposit, if the performance of the gas compressor 31 is lowered, the coke K is started to be charged from the gas inlet, and the cleaning timing can be appropriately grasped and the vane can be cleaned at the optimum timing.
In the method of cleaning a gas compressor of the present embodiment, coke K is introduced from a gas inlet by pressurized nitrogen gas. Therefore, by pressurizing the nitrogen gas and mixing the pressurized nitrogen gas with the coke K and injecting the mixture from the gas inlet, the coke K can be injected from the gas inlet into the interior in a short time, and the workability can be improved.
Further, the cleaning device for a gas compressor of the present embodiment includes: a hopper 40 for storing coke K; supply lines L13, L14 for supplying the coke K stored in the hopper 40 to the gas inlet; and on-off valves 41, 42 provided in the supply lines L13, L14.
Therefore, when the movable blades of the gas compressor 31 are rotated, and the opening/ closing valves 41 and 42 are opened to supply the coke K stored in the hopper 40 from the supply lines L13 and L14 to the gas inlet during the cleaning period, the coke K collides with the surfaces of the movable blades and the stationary blades, and the deposits are removed, thereby cleaning the blades. Since the coke K is porous, the deposits can be effectively removed without damaging the movable blades and the stationary blades, and the gas compressor 31 can be appropriately cleaned. Further, since a large amount of coke K is present in a steel mill or the like, it is not necessary to purchase it at a high cost, and an increase in material cost can be suppressed.
The cleaning device for a gas compressor of the present embodiment is provided with a pressurizing and mixing chamber 38 capable of pressurizing by temporarily storing coke K supplied from a hopper 40 through a cleaning material supply line L13 and supplying nitrogen gas, and a mixture supply line L14 for supplying a mixture of coke K and nitrogen gas in the pressurizing and mixing chamber 38 to a gas inlet. Therefore, when the coke K stored in the hopper 40 is supplied to the pressure mixing chamber 38, the coke K is pressurized by supplying nitrogen gas while being temporarily stored in the pressure mixing chamber 38, and the pressurized nitrogen gas is supplied to the gas inlet through the mixture supply line L14 from the coke K, so that the coke K can be charged from the gas inlet into the interior in a short time, and the workability can be improved.
In the gas compressor of the present embodiment, a purge device is provided in the gas compressor 31 for compressing BFG as the fuel gas F and supplying the compressed BFG to the combustor 22 of the gas turbine 11. Therefore, when the gas compressor 31 is operated, the blades are cleaned, and a significant reduction in compression efficiency can be suppressed.
In the above-described embodiment, the coke K is used as the cleaning material, but the cleaning material is not limited to the coke K, and may be porous and burnable, and may be coal, for example.
In the above-described embodiment, the gas compressor according to the present invention has been described as a member for compressing Blast Furnace Gas (BFG) as fuel gas F, but the gas compressor according to the present invention may be applied to a compressor for compressing air.
Description of the reference numerals
10 Combined cycle plant
11 gas turbine
12 waste heat recovery boiler
13 steam turbine
14 electric generator
21 compressor
22 burner
23 turbine
24 rotor
27 turbine
31 gas compressor
32 turbine
38 pressurized mixing chamber
40 hopper
A air
AC compressed air
F fuel gas
FC compressing fuel gas
FG combustion gas
EG waste gas
S steam
W condensing water.
Claims (9)
1. A method for cleaning a gas compressor is characterized in that,
when an axial compressor for compressing gas is operated, a porous cleaning material having an adjusted shape is fed from a gas inlet to clean the blades.
2. The method for cleaning a gas compressor according to claim 1,
the cleaning material is set to a predetermined hardness and/or a predetermined particle diameter.
3. The method for cleaning a gas compressor according to claim 2,
the hardness and/or particle size of the cleaning material is changed to an optimum predetermined hardness and/or particle size according to the adhesion state of the deposits on the blade.
4. The cleaning method of a gas compressor according to any one of claims 1 to 3,
the cleaning material is coke.
5. The cleaning method of a gas compressor according to any one of claims 1 to 4,
and starting the charging of the cleaning material from the gas inlet when the performance of the compressor is reduced to a predetermined performance or less.
6. The cleaning method of a gas compressor according to any one of claims 1 to 5,
the cleaning material is fed from the gas inlet by the pressurized inert gas.
7. A cleaning device for a gas compressor, which cleans blades when an axial compressor for compressing gas is operated,
the cleaning device for the gas compressor comprises:
a hopper for storing the porous cleaning material with the adjusted shape;
a supply line for supplying the cleaning material stored in the hopper to a gas inlet; and
and an on-off valve provided in the supply line.
8. The cleaning apparatus of a gas compressor according to claim 7,
the cleaning device of the gas compressor is provided with: a pressurizing and mixing chamber that temporarily stores the cleaning material supplied from the hopper through the supply line and can be pressurized by supplying an inert gas; and a mixture supply line for supplying the mixture of the cleaning material and the inert gas in the pressurized mixing chamber to the gas inlet.
9. A gas compressor, characterized in that,
the gas compressor is provided with a cleaning device of the gas compressor according to claim 7 or 8.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017144555A JP2019027298A (en) | 2017-07-26 | 2017-07-26 | Method and device for cleaning gas compressor and gas compressor |
| JP2017-144555 | 2017-07-26 | ||
| PCT/JP2018/027967 WO2019022162A1 (en) | 2017-07-26 | 2018-07-25 | Gas compressor cleaning method and device, and gas compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110959076A true CN110959076A (en) | 2020-04-03 |
Family
ID=65040242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880049645.0A Pending CN110959076A (en) | 2017-07-26 | 2018-07-25 | Method and device for cleaning gas compressor and gas compressor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2019027298A (en) |
| KR (1) | KR20200020864A (en) |
| CN (1) | CN110959076A (en) |
| WO (1) | WO2019022162A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4065322A (en) * | 1976-02-23 | 1977-12-27 | General Electric Company | Contamination removal method |
| JPS60172000U (en) * | 1984-04-24 | 1985-11-14 | 新日本製鐵株式会社 | dry cleaning equipment |
| JP2005226464A (en) * | 2004-02-10 | 2005-08-25 | Jfe Steel Kk | On-line flushing method of blast furnace gas compressor in blast furnace gas mono-fuel combustion gas turbine |
| US20140066349A1 (en) * | 2011-06-22 | 2014-03-06 | Envirochem Solutions Llc | Coke compositions for on-line gas turbine cleaning |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07269302A (en) | 1994-03-30 | 1995-10-17 | Mitsubishi Heavy Ind Ltd | Blade washing method of axial flow compressor and device thereof |
-
2017
- 2017-07-26 JP JP2017144555A patent/JP2019027298A/en not_active Withdrawn
-
2018
- 2018-07-25 KR KR1020207001853A patent/KR20200020864A/en not_active Application Discontinuation
- 2018-07-25 CN CN201880049645.0A patent/CN110959076A/en active Pending
- 2018-07-25 WO PCT/JP2018/027967 patent/WO2019022162A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4065322A (en) * | 1976-02-23 | 1977-12-27 | General Electric Company | Contamination removal method |
| JPS60172000U (en) * | 1984-04-24 | 1985-11-14 | 新日本製鐵株式会社 | dry cleaning equipment |
| JP2005226464A (en) * | 2004-02-10 | 2005-08-25 | Jfe Steel Kk | On-line flushing method of blast furnace gas compressor in blast furnace gas mono-fuel combustion gas turbine |
| US20140066349A1 (en) * | 2011-06-22 | 2014-03-06 | Envirochem Solutions Llc | Coke compositions for on-line gas turbine cleaning |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019022162A1 (en) | 2019-01-31 |
| JP2019027298A (en) | 2019-02-21 |
| KR20200020864A (en) | 2020-02-26 |
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Address after: Kanagawa Prefecture, Japan Applicant after: Mitsubishi Power Co., Ltd Address before: Kanagawa Prefecture, Japan Applicant before: MITSUBISHI HITACHI POWER SYSTEMS, Ltd. |
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Application publication date: 20200403 |