CN100400800C - Method for turbine washing with damp steam - Google Patents
Method for turbine washing with damp steam Download PDFInfo
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- CN100400800C CN100400800C CNB2006100482847A CN200610048284A CN100400800C CN 100400800 C CN100400800 C CN 100400800C CN B2006100482847 A CNB2006100482847 A CN B2006100482847A CN 200610048284 A CN200610048284 A CN 200610048284A CN 100400800 C CN100400800 C CN 100400800C
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Abstract
This invention relates to one method for moisture vapor to clear steam turbine, which comprises the following steps: when steam turbine is running normally, connecting it with other turbine main vapor spray guide tube with centrifugal disk atomizer connected in middle; preparing phase, steam turbine impacting phase, vapor processing clearing phase; when temperature is near 100 degrees, discharging dirty water and when discharge water clears, stopping water flow and closing high voltage pump and valve and closing first vapor spray guide and clear proceedings.
Description
Technical field
The present invention relates to a kind of cleaning method of steam turbine, particularly relate to a kind of method with turbine washing with damp steam.
Background technique
Current, the effective measures that China handles turbine fouling mainly are to take off the lid maintenance.Concrete grammar is: at first stop steam turbine running, treat that center housing temperature reduces after, unclamp steam turbine cylinder mating face bolt.Sling outer shell top cylinder body, split out vaporium, take out inner casing top cylinder body and front and back bearing shell, hang out rotor etc.Use high pressure water washing steam turbine passage component then, promptly return dress after each parts cleans up.Because the steam turbine complex structure, installation precision requires high, and the installation time reaches a couple of days, and than also needing about 40 hours time faster, this had both influenced the running rate of steam turbine, had increased the maintenance burden again, had directly reduced user's economic benefit.
The steam turbine user who has cleans steam turbine with citric acid.This kind method is: when treating that halt turbines is cooled to the 100 degree left and right sides; hot water adding citric acid with uniform temp; with acid solution with being pumped in the steam turbine; make acid solution between steam turbine and pump, form the closed-loop path; circulation repeatedly in the loop; and be aided with the moving rotor of dish, acid solution is fully contacted with flow passage component.To reach the purpose of scale removal.This method has alleviated the labor intensity of maintenance because do not take off lid, has relaxed the technical requirements to the maintainer.But clean time is longer, generally needs three day time, has still had a strong impact on the running rate of steam turbine, has reduced user's economic benefit.
Summary of the invention
Goal of the invention of the present invention is the defective at prior art; theory according to turbine washing with damp steam; a kind of method with turbine washing with damp steam is provided; this method had both avoided taking off the difficulty of lid maintenance; greatly shortened dead time again; significantly improved the running rate of steam turbine, remarkable in economical benefits.
Realize the foregoing invention purpose by the following technical solutions:
A kind of method with turbine washing with damp steam comprises steam turbine to be cleaned, and described method is undertaken by following step,
When the steam turbine that a, needs clean runs well, itself and the main steam of other steam turbine are led the pouring pipe to be connected, main steam connects atomizer in the middle of leading and drenching pipeline, described atomizer mainly is made up of housing, high-pressure water pipe, atomization spray cap and high pressure flange, it in the housing spray chamber, the steam output side that advances of this spray chamber connects with high pressure flange (4), and atomization spray cap and high-pressure water pipe welding place the center portion in the spray chamber, and this atomization spray cap aperture is that 5mm is relative with the steam flow direction;
B, preparatory stage
When preparing to clean, the steam turbine main steam valve that the plan of at first closing is cleaned with admission modulating valve standard-sized sheet, is opened steam turbine cylinder showering guilding valve, balance tube exhaust steam valve, steam evacuation valve, back pressure showering guilding valve, main steam showering guilding valve, closes atomizer high pressure water valve;
C, steam turbine impulsion stage
Slowly open the steam turbine main steam of cleaning and lead the valve that the main steam of drenching another steam turbine that pipe is connected is led the pouring pipe, the warming velocity of pipeline is controlled at 50 ℃/minute with plan, and with thermometric instrument continuous measurement pipe temperature; When Guan Wen standard-sized sheet main steam showering guilding valve during, at this moment, turbine speed is controlled at 1500-3000 rev/min near the main steam pipe channel temp;
D, steam production and wash phase
After the turbine rotor stabilization of speed, open high-pressure water pump, pressure control is in 15 MPas, open the high pressure water valve this moment and in spray chamber, spray high pressure water by the shower nozzle of atomizer, water spray pressure is 15 MPas, makes that high pressure water and steam flow are reverse to be contacted, and water is fully vaporized, control the rate of descent of the main steam temperature that enters steam turbine well according to the power of steam turbine, be controlled at 3-5 ℃/minute; When vapor (steam) temperature reaches supersaturation, lead and drench the pipe outlet and have a little condensing water droplet to occur, to control amount of water this moment well, general per minute adds water 20-40 liter;
E, when exhaust temperature during near 100 ℃, the water that contains dirt is discharged, and drenches draining and becomes clear when leading, and after color shoals, can stop to add water, closes high-pressure water pump and high pressure water valve, closes the first road main steam showering guilding valve, cleaning finishes.
Owing to adopt above technological scheme; the present invention compared with prior art; its significant advantage is: dead time is short; the cleaning efficiency height; during enterprise's annual shutdown general overhaul; carried out taking off lid inspection, do not found the harmful effect of cleaning operation, and the cleaning of dynamic and static blade is very clean steam turbine.Each unit of back that puts into operation has all reached rated capacity.At present, we have been that steam turbine cleans 20 times in company with this technology, and every unit operation is good, remarkable in economical benefits.
Description of drawings
Fig. 1 is cleaning process figure of the present invention.
Fig. 2 is an atomizer structure schematic representation of the present invention.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Referring to accompanying drawing 1, when steam turbine ran well, the steam turbine that needs are cleaned and the main steam of other steam turbine were led and are drenched pipe and is connected, and the middle connection of pipeline atomizer of the present invention is connected with the high pressure water pipeline.
Atomizer is the device that this method must be used, its concrete structure is referring to accompanying drawing 2, form by housing 1, high-pressure water pipe 2, atomization spray cap 3 and high pressure flange 4, the spray chamber of atomizer adopts No. 20 steel pipe weldering systems of dg200mm to form, advance steam output side and connect with high pressure flange 4, adpting flange 4 is selected the butt welding male and female flange of dg25, Pg100 for use.Atomization spray cap 3 enters the central position of spray chamber 5 with high-pressure water pipe 2 welding, through sleeve pipe, the shower nozzle mouth is relative with the steam flow direction, and the shower nozzle aperture is 5mm, fully contacts with gas-liquid in order to guarantee atomizing effect, atomization spray cap is by being controlled by the high pressure water valve, and water spray pressure generally is controlled at 15 MPas.
Concrete cleaning method is as follows:
1, the preparatory stage
When steam turbine was prepared to clean, the steam turbine main steam valve that will plan earlier to clean cut out, and pressed the orderly closedown operation.With admission modulating valve standard-sized sheet, open cylinder body showering guilding valve, balance tube exhaust steam valve, steam evacuation valve, back pressure showering guilding valve, main steam showering guilding valve, close atomizer high pressure water valve.So far, the preparatory work of cleaning steam turbine finishes.
2, the steam turbine impulsion stage
Slowly open the steam turbine main steam of cleaning and lead the valve that the main steam of drenching another steam turbine that pipe is connected is led the pouring pipe with plan, the pipeline that allows steam preheating be connected, to control the warming velocity of pipeline this moment well, generally be controlled at 50 ℃/minute, and use the thermometric instrument continuous measurement.When Guan Wen standard-sized sheet main steam showering guilding valve during near the main steam pipe channel temp, at this moment, steam turbine should have lower rotating speed, and turbine speed is controlled at 1500-3000 rev/min.
3, steam production and wash phase
This stage is the critical stage that steam turbine cleans, and also is accident stage occurred frequently, still stage the most rambunctious.So, require the operator necessarily to concentrate one's attention, concentrate; It is steady that operation is wanted, and movement range is little.
After rotor speed is stable, opens the high pressure water valve and in spray chamber, spray high pressure water, make that high pressure water and steam flow are reverse to be contacted, to reach the purpose that water is fully vaporized.Before opening the high pressure water valve, high-pressure water pump should be opened.Pressure control is in 15 MPas.Entering of high pressure water reduced vapor (steam) temperature, reduced the degree of superheat of steam.This moment, emphasis was to control the rate of descent of the main steam temperature that enters steam turbine well.Different because of the power height of steam turbine, decrease of temperature speed is variant.Low power can be slightly fast, the temperature drop speed of large steam turbine must be slow, and temperature drop speed is as the criterion with steam turbine operating instruction permitted value.
Along with constantly spraying into of high pressure water, vapor (steam) temperature drops to the saturation temperature under the relative vapour pressure gradually, owing to the steam acting further descends vapor (steam) temperature, reaches supersaturation, and leading this moment to drench to manage to export has a little condensing water droplet to occur.Control amount of water well, avoid water attack to take place.
Vapor (steam) temperature further descends, and leads to drench the mouth of pipe and firm water is arranged into discharge, and when exhaust temperature during near 100 ℃, has relatively large water to discharge, and the draining color takes on a red color or lark is determined by the dirt composition.Drench the draining change clearly when leading, after color shoals, can stop to add water.Close the termination of pumping of high pressure water valve, the quick closedown first road main steam showering guilding valve.Cleaning finishes.
Remove two steam turbine main steams and lead the connecting line that drenches pipe, steam turbine enters the heating coil stage immediately, low speed warming stage, raising speed stage, normal operation input.From the steam turbine removal of load shut down cleaning finish and drop into the band oepration at full load, basic controlling was finished with interior at four hours.Power height according to steam turbine is different, and time length slightly changes.
Clean the steam turbine Control Parameter
1, turbine speed 1500-3000 rev/min
2, high pressure water pressure 15 MPas
3, clean vapor pressure 3.5 MPas
Several problems that should be noted that
1, water for cleaning is good with soft water.
2, thermometry is wanted in time, and per minute is measured temperature at least one time.
3, temperature-fall period must be steadily slow, controls the scope that the difference that rises is allowing.In order to avoid rubbing, dynamic and static blade Chan Sheng Touch leads to a disaster.This is very important.
4, each connecting tube joint is critical to reinforce and leans on, and avoids the steam ejection to hurt sb.'s feelings.
For the ease of understanding the back unit operation Parameter Optimization situation of cleaning, the unit operation parameter list before and after now steam turbine being cleaned is as follows:
Steam turbine cleans forward and backward unit operation parametric statistics table
Annotate: unit, wherein steam consumption t/h; Rotating speed rpm; Inflate quantity Nm
3/ h
Steam turbine of the present invention is the steam turbine that is used in forefront of the production, belongs to known technology.
Claims (1)
1. the method with turbine washing with damp steam comprises steam turbine to be cleaned, it is characterized in that: described method is undertaken by following step,
When the steam turbine that a, needs clean runs well, itself and the main steam of other steam turbine are led the pouring pipe to be connected, main steam connects atomizer in the middle of leading and drenching pipeline, described atomizer mainly is made up of housing, high-pressure water pipe, atomization spray cap and high pressure flange, it in the housing spray chamber, the steam output side that advances of this spray chamber connects with high pressure flange, and atomization spray cap and high-pressure water pipe welding place the center portion in the spray chamber, and this atomization spray cap aperture is that 5mm is relative with the steam flow direction;
B, preparatory stage
When preparing to clean, the steam turbine main steam valve that the plan of at first closing is cleaned with admission modulating valve standard-sized sheet, is opened steam turbine cylinder showering guilding valve, balance tube exhaust steam valve, steam evacuation valve, back pressure showering guilding valve, main steam showering guilding valve, closes atomizer high pressure water valve;
C, steam turbine impulsion stage
Slowly open the steam turbine main steam of cleaning and lead the valve that the main steam of drenching another steam turbine that pipe is connected is led the pouring pipe, the warming velocity of pipeline is controlled at 50 ℃/minute with plan, and with thermometric instrument continuous measurement pipe temperature; When Guan Wen standard-sized sheet main steam showering guilding valve during, at this moment, turbine speed is controlled at 1500-3000 rev/min near the main steam pipe channel temp;
D, steam production and wash phase
After the turbine rotor stabilization of speed, open high-pressure water pump, pressure control is in 15 MPas, open the high pressure water valve this moment and in spray chamber, spray high pressure water by the shower nozzle of atomizer, water spray pressure is 15Mpa, makes that high pressure water and steam flow are reverse to be contacted, and water is fully vaporized, control the rate of descent of the main steam temperature that enters steam turbine well according to the power of steam turbine, be controlled at 3-5 ℃/minute; When vapor (steam) temperature reaches supersaturation, lead and drench the pipe outlet and have a little condensing water droplet to occur, to control amount of water this moment well, per minute adds water 20-40 liter;
E, when exhaust temperature during near 100 ℃, the water that contains dirt is discharged, and drenches draining and becomes clear when leading, and after color shoals, can stop to add water, closes high-pressure water pump and high pressure water valve, closes the first road main steam showering guilding valve, cleaning finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100482847A CN100400800C (en) | 2006-09-15 | 2006-09-15 | Method for turbine washing with damp steam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100482847A CN100400800C (en) | 2006-09-15 | 2006-09-15 | Method for turbine washing with damp steam |
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| CN1924302A CN1924302A (en) | 2007-03-07 |
| CN100400800C true CN100400800C (en) | 2008-07-09 |
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| CNB2006100482847A Active CN100400800C (en) | 2006-09-15 | 2006-09-15 | Method for turbine washing with damp steam |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922313B (en) * | 2009-06-09 | 2013-06-26 | 同济大学 | Method for suppressing steam turbine for geothermal power generation from scaling |
| CN102218408A (en) * | 2011-03-23 | 2011-10-19 | 山西太钢不锈钢股份有限公司 | Method for cleaning salt deposition on turbine blade |
| CN103480599B (en) * | 2013-09-03 | 2015-10-28 | 安徽淮化股份有限公司 | A kind of method of Low-temperature cleaning turbine blade and device thereof |
| CN105134301B (en) * | 2015-10-08 | 2017-08-25 | 新兴铸管股份有限公司 | A kind of turbine for installing boiling rotor and stator blade cleaning device additional |
| CN111434865A (en) * | 2019-01-11 | 2020-07-21 | 香港生产力促进局 | Toilet cleaner |
| CN113404910B (en) * | 2021-07-07 | 2022-10-14 | 浙江安构控制阀科技有限公司 | High-temperature-resistant corrosion-resistant rotary regulating valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4256511A (en) * | 1979-09-17 | 1981-03-17 | The Dow Chemical Company | High energy wash of ljungstrom air preheater |
| CN1042365C (en) * | 1991-10-29 | 1999-03-03 | 四川电力科学试验研究所 | Method and apparatus for removing siliceous dirt in turbine |
| US6017399A (en) * | 1994-03-17 | 2000-01-25 | Calgon Corporation | Method for controlling and removing solid deposits from a surface of a component of a steam generating system |
| CN1125311C (en) * | 1996-12-10 | 2003-10-22 | 株式会社东芝 | Boiler washing method for power plant |
| US6797070B2 (en) * | 2001-07-17 | 2004-09-28 | John Darryl Boyce | Method for cleaning a cooler apparatus |
| CN1667344A (en) * | 2005-04-07 | 2005-09-14 | 濮文虹 | On-load washing method for thermodynamic system |
-
2006
- 2006-09-15 CN CNB2006100482847A patent/CN100400800C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4256511A (en) * | 1979-09-17 | 1981-03-17 | The Dow Chemical Company | High energy wash of ljungstrom air preheater |
| CN1042365C (en) * | 1991-10-29 | 1999-03-03 | 四川电力科学试验研究所 | Method and apparatus for removing siliceous dirt in turbine |
| US6017399A (en) * | 1994-03-17 | 2000-01-25 | Calgon Corporation | Method for controlling and removing solid deposits from a surface of a component of a steam generating system |
| CN1125311C (en) * | 1996-12-10 | 2003-10-22 | 株式会社东芝 | Boiler washing method for power plant |
| US6797070B2 (en) * | 2001-07-17 | 2004-09-28 | John Darryl Boyce | Method for cleaning a cooler apparatus |
| CN1667344A (en) * | 2005-04-07 | 2005-09-14 | 濮文虹 | On-load washing method for thermodynamic system |
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| CN1924302A (en) | 2007-03-07 |
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