CN109424373A - Application method of the fire resistant oil in steam turbine adjusting oil system - Google Patents
Application method of the fire resistant oil in steam turbine adjusting oil system Download PDFInfo
- Publication number
- CN109424373A CN109424373A CN201710730046.2A CN201710730046A CN109424373A CN 109424373 A CN109424373 A CN 109424373A CN 201710730046 A CN201710730046 A CN 201710730046A CN 109424373 A CN109424373 A CN 109424373A
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- Prior art keywords
- oil
- fire
- resistant oil
- steam turbine
- fire resistant
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Classifications
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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
-
- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
This application discloses a kind of application method of fire resistant oil in steam turbine adjusting oil system, comprising: by the control of fire resistant oil moisture within the scope of 300-500ppm, fire-resistant oil temperature is set within the scope of 45-50 DEG C.The application can reduce the blocking probability of strainer in steam turbine adjusting oil system, improve the service life of strainer in steam turbine adjusting oil system.
Description
Technical field
This application involves a kind of application methods of fire resistant oil, and in particular to a kind of fire resistant oil is in steam turbine adjusting oil system
In application method, be suitable for nuclear power plant.
Background technique
Previous, the main filter net jam frequency of unit GFR (steam turbine adjusting oil system) of nuclear power station is generally higher, most short
Average life span is less than one month.Before, when we are to a certain nuclear power unit overhaul, mechanical punching has been carried out to protection oil-piping
It washes, the main filter net jam frequency of GFR is still maintained at 21-29 times/every circulation.And the overhaul again after aforementioned overhaul
Cheng Zhong has carried out chemical flush (two unit chemical backwashing manners are entirely different) GFR, and by fire resistant oil from EHC+EHC
PLUS mixing has been changed to EHC PLUS, EHC and EHC PLUS is different fire resistant oil model.However after overhaul, the main filter of unit GFR
Net blocking frequency is not decreased obviously, and the strainer service life is not still high, while showing for solenoid valve bite and small filter net jam occurs
As.
Summary of the invention
The purpose of the application is: a kind of application method of fire resistant oil in steam turbine adjusting oil system is proposed, to reduce vapour
Turbine adjusts the blocking probability of strainer in oil system, improves the service life of strainer in steam turbine adjusting oil system.
In order to achieve the above object, the technical solution of the application is:
A kind of application method of fire resistant oil in steam turbine adjusting oil system, comprising:
By the control of fire resistant oil moisture within the scope of 300-500ppm, fire-resistant oil temperature is set within the scope of 45-50 DEG C.
The application further includes following preferred embodiment based on the above technical solution:
Periodically the fire-resistant oil-piping of steam turbine adjusting oil system is rinsed.
During the fire-resistant oil-piping to steam turbine adjusting oil system is rinsed, using external oil filter to vapour
Turbine adjusts the fire resistant oil impurity screening in the fire resistant oil fuel tank of oil system.
During the fire-resistant oil-piping to steam turbine adjusting oil system is rinsed, using external oil filter to vapour
Turbine adjusts the continuous impurity screening of fire resistant oil in the fire resistant oil fuel tank of oil system.
Fire-resistant oil temperature is set within the scope of 45-48 DEG C.
Fire-resistant oil temperature is set in 45 DEG C.
Fire-resistant oil temperature is set in 48 DEG C.
By the control of fire resistant oil moisture within the scope of 400ppm-500ppm.
Fire resistant oil moisture is controlled as 400ppm.
The advantage of the application is: by the control of temperature and moisture to fire resistant oil, specifically by fire resistant oil moisture control
Fire-resistant oil temperature is set within the scope of 45-50 DEG C by system within the scope of 300-500ppm, and improve the main strainer of GFR uses the longevity
Life, reduces screen replacing bring risk, improves GFR system reliability, ensure that the safe operation of unit.
Specific embodiment
Below by specific embodiment, invention is further described in detail.The application can be with a variety of different
Form is realized, however it is not limited to embodiment described in the present embodiment.
However, those skilled in the art may be aware that one or more detail description can be with
Be omitted, or can also adopt with other methods, component or material.In some instances, some embodiments are not retouched
It states or is not described later in detail.
In addition, technical characteristic described herein, technical solution can also be in one or more embodiments arbitrarily to close
Suitable mode combines.For those skilled in the art, it should be readily appreciated that method related with embodiment provided herein
Step or operation order can also change.Therefore, any sequence in embodiment is merely illustrative purposes, does not imply that and wants
It asks in a certain order, is required unless expressly stated according to a certain sequence.
The general introduction and principle of this fire resistant oil application method of the application
Application method of this fire resistant oil of the application in steam turbine adjusting oil system, main includes two aspects:
The first, by fire resistant oil moisture control in steam turbine adjusting oil system within the scope of 300~500ppm.
The second, fire-resistant oil temperature in steam turbine adjusting oil system is set within the scope of 45~50 DEG C.
In addition, improving strainer in order to further decrease the blocking probability of strainer and using the time, further include that the third aspect is wanted
It asks: periodically the fire-resistant oil-piping of steam turbine adjusting oil system being rinsed.
It is specifically described as follows:
One, by fire resistant oil moisture control in steam turbine adjusting oil system within the scope of 300-500ppm.
The ingredient of fire resistant oil is mainly methyl phosphorodithioate, and phosphate can occur oxidation reaction under the action of water, heat and generate
Acid, acid product react with the metal ion in oil and generate metal salt.The metal salt (Gels) just generated is dissolved in fire-resistant
Oil can pass through strainer and flow in system.And becomes catalyst, exacerbate the oxidation of fire resistant oil, accelerate new metal salt raw
At.
Gels is easy to be deposited on inner wall of the pipe, and is heated and stiffens into Varnish.The mobility of pipeline is poorer, easier to make
At deposition, such as protection oil-piping.Metal ion is mainly Ca, Mg, Na (diatomite strainer) that chemical filter core releases,
The Fe that Al (activated alumina strainer) and equipment attrition release.
Phosphate decomposes generation acidic materials and is divided into three steps, and first phenyl ring is formed after being substituted by the oxonium ion of hydrone
Monophosphate, while releasing an alkyl phenol.Second phenyl ring forms polyphosphoric acid after being substituted, then discharges an alkyl phenol.The
Three phenyl ring then form polyphosphoric acid after being substituted, and discharge an alkyl phenol again.
Specific reaction process is as follows:
Wherein polyphosphoric acid is dissolved in water, and dissolution rate is more especially under high temperature and the lower situation of fuel resistant volume resistivity
Height is easy that the dissolvable jelly for becoming blocking strainer filter core is precipitated.
It can be seen that fire resistant oil ageing products have the carbide varnish that can be deposited and solvable from reaction process above
The jelly of solution.
So improving the moisture in fire resistant oil, gel-like foreign matters can be made to re-dissolve to a certain degree, extend filter element life.But
Moisture cannot be excessively high, because it can accelerate the oxidation reaction of oil.
From EPRI fire resistant oil directive/guide it can be seen that most of nuclear power producer in steam turbine adjusting oil system for running
The requirement of oily (for fire resistant oil) is less than 1000-2000ppm, some nuclear power plants require to be less than 1000ppm, actually smaller than
200ppm, moisture are seriously relatively low.
Inventors have found that by the control of fire resistant oil moisture is within the scope of 300~500ppm in steam turbine adjusting oil system, energy
A possibility that presence of jelly is enough greatly reduced, reduces filter net jam.
Particularly, it has been found that when fire-resistant water content in oil is increased to 400ppm or more especially 400ppm, the strainer service life
It is obviously prolonged, filter net jam frequency declines to a great extent.
Two, fire-resistant oil temperature in steam turbine adjusting oil system is set within the scope of 45-50 DEG C.
The temperature of fire resistant oil cannot be excessively high, can not be too low.If temperature is excessively high, the deterioration of fire resistant oil can be accelerated；And it is warm
When spending low, fire-resistant oil viscosity becomes larger, and the resistance in strainer increases, and strainer is caused to block in advance.Experiment discovery, fire resistant oil
After temperature increases, strainer service life extends at once.
And it is previous, fire-resistant oil temperature only has 42 DEG C in steam turbine adjusting oil system in some nuclear power plants, serious relatively low.
It was found that by fire-resistant oil temperature control in steam turbine adjusting oil system within the scope of 45~50 DEG C.It can not only
A possibility that guaranteeing the performance of fire resistant oil, while greatly reducing filter net jam.
Three, it in order to further decrease the blocking probability of strainer, improves strainer and uses the time, also periodically to Steam Turhine Adjustment
The fire-resistant oil-piping of oil system is rinsed.
Rinse necessity: the aging impurity of fire resistant oil can be deposited on inside the fire-resistant oil-piping of steam turbine adjusting oil system,
It can not only enter inside the precise parts such as oil pump, servo valve at runtime, can also accelerate the aging of fire resistant oil as catalyst.
So needing to carry out periodic cleaning to the fire-resistant oil-piping of system.
Specific purging method are as follows: in order to guarantee flushing flow rate, using two fire resistant oil pump paired runnings, rinse one every time
Group valve (septum valve+corresponding high-pressure stop valve).And during flushing, external oil filter pair is used
Fire resistant oil in steam turbine adjusting oil system fire resistant oil fuel tank carries out continuous (continual) impurity screening.
And we have also formulated flushing standard, specifically: per half an hour to the fire resistant oil in the fire resistant oil fuel tank into
Row sampling analysis, grain count continuously occur falling to qualification twice.
Embodiment one:
Nuclear power unit GFR (steam turbine adjusting oil system) in the present embodiment one is interior for the previous period at it, and main strainer was once
There is the phenomenon that frequent jams, and the power generator turbine is adjusted fire resistant oil moisture in oil system and is increased to 400ppm by us
Afterwards, filter net jam frequency declines to a great extent.
Embodiment two:
Nuclear power unit in the present embodiment two includes two units, respectively No.1 unit and No. two units, from this implementation
Since nuclear power unit overhaul in example two, the main strainer of No.1 unit GFR has been plugged 7 times.Our comparison check No.1 units
The oil temperature of fire resistant oil in GFR and No. two unit GFR fire resistant oil fuel tank, only 41 DEG C or so, and No.1 unit is compared with No. two units
Relatively low 0.7 DEG C.At that time according to low temperature prediction scheme, by the fire resistant oil oil temperature definite value of No.1 unit GFR and No. two unit GFR from 43 DEG C
45 DEG C are increased to, while by moisture control after 400ppm, the main filter net jam frequency of two unit GFR declines to a great extent, two unit summers
Season, longest was up to 102/67 day, converts into and operates normally 4-5 month (originally summer longest only has 3 months).At the beginning of in Septembers, 2014
In order to verify the relationship of strainer runing time and oil temperature, No.1 unit GFR A column temperature definite value is reverted to 43 DEG C, the strainer longevity
Life is fallen below 32 days at once.The proportional relation of fire-resistant oil temperature Yu strainer runing time has been confirmed from the negative.
Embodiment three:
Nuclear power unit in the present embodiment three also includes two units, respectively No.1 unit and No. two units, in the core
When electric major overhaul, the fire resistant oil that the GFR of No.1 unit and No. two units is used is changed to big lake fire resistant oil by us.Greatly
It is most only one week short to repair main strainer runing time of rear initial stage.Then we are to fire resistant oil in No.1 unit and No. two unit GFR
Control is optimized in moisture, oil temperature, fire resistant oil moisture is controlled in 500ppm or so, while by steam turbine adjusting oil system
Middle fire-resistant oil temperature is set in 50 DEG C or so.Main strainer (old-fashioned strainer) runing time of No.1 unit GFR reaches at present
138 days, (new model strainer, flow area increased 30%) runing time compared to old-fashioned strainer to the main strainer of No. two unit GFR
Reach 279 days.The strainer service life has obtained essence improvement.
Example IV:
In the present embodiment four, in nuclear power unit overhaul, the unit GFR fire resistant oil used is changed to big lake fire resistant oil, because
Low temperature is larger to big lake fire resistant oil viscosity influence, while low temperature also results in fire resistant oil moisture and delays to increase to 400ppm
More than, so GFR main pipe oil temperature definite value is risen to 48 DEG C, and so that fire resistant oil moisture is reached 400ppm by corresponding process, filters
The net service life is improved significantly.
Embodiment five:
Inventors realized that moisture has certain effect to the strainer service life is improved, so by exiting five center of the present embodiment
Motor group GFR oil tank breather and change the means such as vacuum pump definite value to improve fire resistant oil moisture to 300-500ppm, discovery
After adjusting fire resistant oil moisture, each steam turbine adjusting oil system kind strainer service life is improved significantly.
Embodiment six (comparative example):
In the present embodiment six, the fire-resistant oil-piping of GFR is rinsed in nuclear power unit overhaul, has replaced valve
Preceding protection oil-piping, while pipeline rout is transformed, hot spot is avoided, and replaced new EHC PLUS (fire-resistant
Oil type number).The moisture and temperature of fire resistant oil, temperature and the horizontal level for being maintained in reduction are not but adjusted.After overhaul,
Though solenoid valve bite phenomenon does not occur again, main strainer runing time is still shorter, and it is small GRE valve power oil-in occur
The phenomenon that filter net jam.
Work data in above each embodiment is the security information of applicant, is disclosed in patent application document
Before, never external disclosure.
Above content is that further detailed description of the invention, and it cannot be said that originally in conjunction with specific embodiment
The specific implementation of invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, not
Under the premise of being detached from present inventive concept, a number of simple deductions or replacements can also be made.
Claims (9)
1. a kind of application method of fire resistant oil in steam turbine adjusting oil system characterized by comprising
By the control of fire resistant oil moisture within the scope of 300-500ppm, fire-resistant oil temperature is set within the scope of 45-50 DEG C.
2. application method of the fire resistant oil according to claim 1 in steam turbine adjusting oil system, which is characterized in that also wrap
It includes: periodically the fire-resistant oil-piping of steam turbine adjusting oil system being rinsed.
3. application method of the fire resistant oil according to claim 2 in steam turbine adjusting oil system, which is characterized in that right
During the fire-resistant oil-piping of steam turbine adjusting oil system is rinsed, using external oil filter to steam turbine adjusting oil system
Fire resistant oil fuel tank in fire resistant oil impurity screening.
4. application method of the fire resistant oil according to claim 3 in steam turbine adjusting oil system, which is characterized in that right
During the fire-resistant oil-piping of steam turbine adjusting oil system is rinsed, using external oil filter to steam turbine adjusting oil system
Fire resistant oil fuel tank in the continuous impurity screening of fire resistant oil.
5. application method of the fire resistant oil according to claim 1 or 2 or 3 or 4 in steam turbine adjusting oil system, feature
It is, fire-resistant oil temperature is set within the scope of 45-48 DEG C.
6. application method of the fire resistant oil according to claim 1 or 2 or 3 or 4 in steam turbine adjusting oil system, feature
It is, fire-resistant oil temperature is set in 45 DEG C.
7. application method of the fire resistant oil according to claim 1 or 2 or 3 or 4 in steam turbine adjusting oil system, feature
It is, fire-resistant oil temperature is set in 48 DEG C.
8. application method of the fire resistant oil according to claim 1 or 2 or 3 or 4 in steam turbine adjusting oil system, feature
It is,
By the control of fire resistant oil moisture within the scope of 400ppm-500ppm.
9. application method of the fire resistant oil according to claim 8 in steam turbine adjusting oil system, which is characterized in that will resist
Fuel-oil-water sub-control is made as 400ppm.
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| CN201710730046.2A CN109424373B (en) | 2017-08-23 | 2017-08-23 | Application method of fire resistant oil in steam turbine regulating oil system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710730046.2A CN109424373B (en) | 2017-08-23 | 2017-08-23 | Application method of fire resistant oil in steam turbine regulating oil system |
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| CN109424373A true CN109424373A (en) | 2019-03-05 |
| CN109424373B CN109424373B (en) | 2022-03-22 |
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