CN111715652A - Method for determining cleaning time of water solution of through-flow part of marine gas turbine - Google Patents

Method for determining cleaning time of water solution of through-flow part of marine gas turbine Download PDF

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Publication number
CN111715652A
CN111715652A CN202010370603.6A CN202010370603A CN111715652A CN 111715652 A CN111715652 A CN 111715652A CN 202010370603 A CN202010370603 A CN 202010370603A CN 111715652 A CN111715652 A CN 111715652A
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CN
China
Prior art keywords
gas turbine
rated
cleaning
folding
rotating speed
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Pending
Application number
CN202010370603.6A
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Chinese (zh)
Inventor
魏昌淼
唐鹏
季钧
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703th Research Institute of CSIC Wuxi Branch
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703th Research Institute of CSIC Wuxi Branch
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Application filed by 703th Research Institute of CSIC Wuxi Branch filed Critical 703th Research Institute of CSIC Wuxi Branch
Priority to CN202010370603.6A priority Critical patent/CN111715652A/en
Publication of CN111715652A publication Critical patent/CN111715652A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect

Abstract

The invention discloses a method for determining the cleaning time of an aqueous solution of a through-flow part of a marine gas turbine, which takes the change of the rotating speed of the gas turbine as the basis for cleaning the aqueous solution, thereby not only achieving the effect of cleaning the aqueous solution, but also avoiding the condition that the insulation of electrical equipment of a unit is low easily caused by frequent cleaning of the aqueous solution of the through-flow part of the gas turbine. The rotating speed of the current operation rated working condition is converted and calculated, the difference value of the rotating speed of the current operation rated working condition and the converted calculated value of the rotating speed of the rated working condition after the previous cleaning is compared, and when the difference value is larger than a certain value, the water solution cleaning is needed once.

Description

Method for determining cleaning time of water solution of through-flow part of marine gas turbine
Technical Field
The invention belongs to the technical field of gas turbines, and particularly relates to a method for determining the cleaning time of an aqueous solution of a through-flow part of a marine gas turbine. (Note: the "marine gas turbine" is hereinafter simply referred to as "gas turbine").
Background
The gas turbine is widely applied to ship power and ship power generation as high-speed rotating power equipment. In the long-time use process, when the gas turbine compressor compresses air, dust and salt mist carried by the air easily pollute and deposit compressor blades, so that the blade profile of the through-flow part is damaged, and the performance of the gas turbine is reduced. Therefore, the gas turbine is provided with the water solution cleaning system to regularly wash the compressor and the turbine, so that the stable output is kept, and the service life of the unit is prolonged. The cleaning of the water solution of the through-flow part of the gas turbine needs the gas turbine to stop working routinely, meanwhile, the frequent cleaning of the water solution of the through-flow part of the gas turbine is easy to cause the condition of low insulation of electrical equipment of a unit, and the frequent variable working condition operation of the gas turbine is not suitable for simply taking the operation time as the judgment condition of cleaning, so that the gas turbine needs to be cleaned once in any state, which is a crucial problem. The invention provides a method for determining the cleaning time of an aqueous solution of a through-flow part of a marine gas turbine, which has important significance for the stable operation of the gas turbine in order to protect the service life of the gas turbine.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for determining the cleaning time of the water solution of the through-flow part of the marine gas turbine, which comprises the following steps:
step one, the rated working condition rotating speed N of the current work of the gas turbine is calculatedRated AThe folding rotation speed N is obtained by carrying out folding correction calculation on the air inlet/outlet pressure and atmospheric parameters (atmospheric temperature and atmospheric pressure)Rated A (folding)。
Step two, rotating speed N under rated working condition after gas turbine is cleaned for the last timeRated BThe folding rotation speed N is obtained by carrying out folding correction calculation on the air inlet/outlet pressure and atmospheric parameters (atmospheric temperature and atmospheric pressure)Rated B (folding)。
Step three, taking N in step oneRated A (folding)And N in step twoRated B (folding)And (4) subtracting, and when the difference value is more than or equal to 80r/min, cleaning. Namely NRated A (folding)-NRated B (folding)More than or equal to 80r/min, and aqueous solution cleaning is needed.
After the gas turbine operates for a period of time, because the dust and salt fog carried by the air are easy to pollute and deposit the blades of the compressor, the blade profile of the through-flow part is damaged, the performance of the gas turbine is reduced, the through-flow part of the gas turbine needs to be cleaned by aqueous solution, and how to determine the cleaning time of the aqueous solution becomes a crucial problem. The invention uses the change of the converted calculation rotating speed of the gas turbine as the basis for judging the cleaning time of the through-flow part of the gas turbine, thereby avoiding the pure judgment condition of taking the operation time as the cleaning on the premise of achieving the cleaning effect, and simultaneously avoiding the conditions that the insulation of the electric equipment of the unit is low and the normal operation work is influenced due to the frequent cleaning of the partial aqueous solution of the through-flow part of the gas turbine.
Drawings
FIG. 1 is a flow chart of the timing of the aqueous solution purge of the through-flow portion of a marine gas turbine according to the present invention.
FIG. 2 is a graph of operating time and reduced rotational speed for a particular cluster.
Detailed Description
The technical scheme of the invention is explained in detail as follows:
background a gas turbine is in continuous operation and it is known to perform a single aqueous wash after 1000 hours of operation in the preceding period.
1. Step one, the rated working condition rotating speed N of the current work of the gas turbine is calculatedRated AThe air inlet and outlet pressure and the atmospheric parameter are subjected to folding correction calculation to obtain a folding rotating speed NRated A (folding)。
2. Step two, rotating speed N of the gas turbine under the rated working condition after 1000 hoursRated BThe air inlet and outlet pressure and the atmospheric parameter are subjected to folding correction calculation to obtain a folding rotating speed NRated B (folding)，NRated B (folding)Is equal to 5522 r/min.
3. Step three, taking N in step oneRated A (folding)And N in step twoRated B (folding)And (4) subtracting, and when the difference value is more than or equal to 80r/min, cleaning. When the unit is running for 1220 hours, NRated A (folding)Is equal to 5602r/min, i.e. NRated A (folding)And-5522 r/min is more than or equal to 80r/min, and at the moment, one time of aqueous solution cleaning is needed. The running time and the reduced calculated rotational speed are shown in fig. 2.
And then, carrying out water solution cleaning on the gas turbine, wherein the rated working condition is reduced from 5602r/min before cleaning to 5523r/min after cleaning, and the reduced calculated rotating speed is reduced by 79 r/min.
4. In the last step, the unit is washed by the aqueous solution once after being operated for 1200 hours, and then the unit is continuously operated. When the operation time is 1450 hours, the rated working condition reduced calculation rotating speed reaches 5605r/min, at this time, 5605r/min-5523r/min is more than or equal to 80r/min, the water solution cleaning is needed to be carried out again, and the operation time and the reduced calculation rotating speed are shown in figure 2.
The method for calculating the intake pressure, the exhaust pressure and the atmospheric parameters (atmospheric pressure and atmospheric temperature) of the gas turbine by converting and correcting the rated working condition rotating speed N refers to the ship industry standard of the people's republic of China, namely the thermal performance test data processing method of the ship gas turbine.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. A method for determining the cleaning time of the water solution of the through-flow part of a marine gas turbine is characterized by comprising the following steps:
step one, the rated working condition rotating speed N of the current work of the gas turbine is calculatedRated AThe reduction correction calculation is carried out on the air inlet/outlet pressure, the atmospheric temperature and the atmospheric pressure to obtain a reduction rotating speed NRated A (folding)；
Step two, rotating speed N under rated working condition after gas turbine is cleaned for the last timeRated BThe reduction correction calculation is carried out on the air inlet/outlet pressure, the atmospheric temperature and the atmospheric pressure to obtain a reduction rotating speed NRated B (folding)；
Step three, taking N in step oneRated A (folding)And N in step twoRated B (folding)Subtracting, and when the difference value is more than or equal to 80r/min, cleaning; namely NRated A (folding)In combination)-NRated B (folding)More than or equal to 80r/min, and aqueous solution cleaning is needed.
CN202010370603.6A 2020-05-06 2020-05-06 Method for determining cleaning time of water solution of through-flow part of marine gas turbine Pending CN111715652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010370603.6A CN111715652A (en) 2020-05-06 2020-05-06 Method for determining cleaning time of water solution of through-flow part of marine gas turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010370603.6A CN111715652A (en) 2020-05-06 2020-05-06 Method for determining cleaning time of water solution of through-flow part of marine gas turbine

Publications (1)

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CN111715652A true CN111715652A (en) 2020-09-29

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4548040A (en) * 1984-05-11 1985-10-22 Elliott Turbomachinery Company, Inc. Method and apparatus for determining when to initiate cleaning of turbocharger turbine blades
CN101939518A (en) * 2007-12-12 2011-01-05 内皮尔涡轮增压器有限公司 Turbine and method for cleaning turbine blades under operation conditions
CN103277148A (en) * 2013-06-05 2013-09-04 中国南方航空工业(集团)有限公司 Flushing device and cleaning method of turbine engine
CN103389212A (en) * 2013-07-22 2013-11-13 中国航空动力机械研究所 Performance analysis method for gas turbine starter rack provided with free turbine
CN105201567A (en) * 2015-09-06 2015-12-30 苏州市江远热电有限责任公司 Steam turbine circulation part cleaning system and cleaning method
CN108644024A (en) * 2018-04-27 2018-10-12 安徽江淮汽车集团股份有限公司 A kind of control method of diesel engine EGR valve
CN109538313A (en) * 2017-09-22 2019-03-29 通用电气公司 Engine washing analysis
CN110439685A (en) * 2018-05-03 2019-11-12 曼恩能源方案有限公司 Automated turbine booster cleaning device
CN110878729A (en) * 2019-12-10 2020-03-13 潍柴动力股份有限公司 Method and system for self-cleaning waste gas venturi tube for engine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4548040A (en) * 1984-05-11 1985-10-22 Elliott Turbomachinery Company, Inc. Method and apparatus for determining when to initiate cleaning of turbocharger turbine blades
CN101939518A (en) * 2007-12-12 2011-01-05 内皮尔涡轮增压器有限公司 Turbine and method for cleaning turbine blades under operation conditions
CN103277148A (en) * 2013-06-05 2013-09-04 中国南方航空工业(集团)有限公司 Flushing device and cleaning method of turbine engine
CN103389212A (en) * 2013-07-22 2013-11-13 中国航空动力机械研究所 Performance analysis method for gas turbine starter rack provided with free turbine
CN105201567A (en) * 2015-09-06 2015-12-30 苏州市江远热电有限责任公司 Steam turbine circulation part cleaning system and cleaning method
CN109538313A (en) * 2017-09-22 2019-03-29 通用电气公司 Engine washing analysis
CN108644024A (en) * 2018-04-27 2018-10-12 安徽江淮汽车集团股份有限公司 A kind of control method of diesel engine EGR valve
CN110439685A (en) * 2018-05-03 2019-11-12 曼恩能源方案有限公司 Automated turbine booster cleaning device
CN110878729A (en) * 2019-12-10 2020-03-13 潍柴动力股份有限公司 Method and system for self-cleaning waste gas venturi tube for engine

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Application publication date: 20200929