CN106824889A - A kind of generating set oil cooler chemical cleaning method - Google Patents

A kind of generating set oil cooler chemical cleaning method Download PDF

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Publication number
CN106824889A
CN106824889A CN201710076532.7A CN201710076532A CN106824889A CN 106824889 A CN106824889 A CN 106824889A CN 201710076532 A CN201710076532 A CN 201710076532A CN 106824889 A CN106824889 A CN 106824889A
Authority
CN
China
Prior art keywords
oil cooler
water
cleaning
generating set
chemical cleaning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710076532.7A
Other languages
Chinese (zh)
Inventor
李鹏飞
姚克明
李芳�
姜澎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanxi Taigang Stainless Steel Co Ltd
Original Assignee
Shanxi Taigang Stainless Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanxi Taigang Stainless Steel Co Ltd filed Critical Shanxi Taigang Stainless Steel Co Ltd
Priority to CN201710076532.7A priority Critical patent/CN106824889A/en
Publication of CN106824889A publication Critical patent/CN106824889A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/16—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions using inhibitors
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material

Abstract

A kind of generating set oil cooler chemical cleaning method, using " water rinse --- tertiary sodium phosphate+dodecane alkali cleaning --- flushing of water flushings --- sulfamic acid pickling --- water " technique, by chemical cleaning technique reach removing oil cooler in water scale and corrosion product purpose.The present invention uses sulfamic acid（It is relatively slow to metal erosion effect, uniquely can be used as the acid of galvanized metal surfaces cleaning）, cold fuel copper tube dezincification can be prevented.After through Chemical cleaning, the heat transfer effect of oil cooler can be greatly improved, significantly reduce Lubricating Oil Temperature.

Description

A kind of generating set oil cooler chemical cleaning method
Technical field
The invention belongs to generating set oil cooler cleaning technique field.Specifically related to a kind of generating set oil cooler chemistry is clear Washing method.
Background technology
When turbine LP rotors normally run, a part of power is consumed due to bearing friction, being converted into heat makes The lubricating oil temperature of bearing is raised.If oil temperature is too high, bearing is likely to occur softening, deformation or burning damage accident.To make bearing Normal operation, lubricating oil temperature must be kept in certain limit, general to require to enter bearing oil temperature in 35 ~ 45 DEG C, the oil extraction of bearing Temperature rise can just be re-circulated into bearing lubrication after being generally 10 ~ 15 DEG C, thus the oil cooling that must be ejected bearing but.And it is cold Oily device is exactly that the cooling water of temperature lubricating oil higher and low temperature is internally carried out into heat exchange, by adjust cooling water flow come Reach the purpose of control lubricating oil temperature.
Existing more than the ten platforms complementary energy cogeneration unit of Taiyuan Iron and Steel Co. energy source and power head factory, the supporting oil cooler of part of generating units is due to length Internal after phase use to produce a large amount of sludge, incrustation scale and metal oxide, cooling tube inside blocks serious, directly affects cooling heat transferring Effect, causes Lubricating Oil temperature rise, influences lubricant effect.Temperature is increased to 44 DEG C by 38 DEG C after lubricating oil cooling, is easily caused Oil product is aging, rotten, and then aggravates bearing bush abrasion, has a strong impact on the security of steam turbine operation.
Current oil cooler Chemical cleaning mainly uses the pure physical cleaning of hydraulic action, can only remove some machineries miscellaneous Matter, and the raw incrustation scale of knot and metal oxide cannot effectively be removed.
The content of the invention
This technology is acted on by Chemical cleaning, uses sulfamic acid（It is relatively slow to metal erosion effect, uniquely can be used as zinc-plated The acid of cleaning metal surface）, cold fuel copper tube dezincification can be prevented, while incrustation scale and corrosion product in oil cooler can be removed effectively Thing.After through Chemical cleaning, the heat transfer effect of oil cooler can be greatly improved, significantly reduce Lubricating Oil Temperature, it is ensured that oil temperature stabilization, disappear Except equipment attrition hidden danger, steam turbine service life is extended.
Technical solution of the present invention：A kind of generating set oil cooler chemical cleaning method, it is characterized in that including following techniques step Suddenly：
（1）Enter water-filling with demineralized water to rinse, come off loose dirty thing in removing system, untill water outlet is as clear as crystal；
（2）With tertiary sodium phosphate, activating agent（Dodecane）Carry out alkali cleaning, cleaning mud oil, microorganism；Alkali cleaning temperature is 30 ~ 40 DEG C, when Between be 1 hour, make pH value be 9.5~10；
（3）Enter water-filling with demineralized water to rinse, make pH value<9；
（4）With sulfamic acid, corrosion inhibiter（Lan-826）, defoamer（Tributyl phosphate）, reducing agent（Sodium isoascorbate）Carry out Pickling, removes fouling and metal oxide, and pickling temperature is 50 ~ 60 DEG C, and the time is 1 ~ 2 hour,
（5）Enter water-filling with demineralized water to rinse, make pH value>6.
The present invention makes the sludge that oil cooler inside blocks, incrustation scale and metal oxide get effective washing removal, cooling tube Recover unimpeded, oil cooler cooling heat transferring effect is significantly improved, temperature is by original after lubricating oil cooling（Before cleaning）44 DEG C be down to 38 DEG C, meet 35 ~ 45 DEG C of normal requirement requirements, it is ensured that the lubrication and cooling effect of turbo-engine lube, it is to avoid steamer Machine bearing bush abrasion, improves the security of steam turbine operation.Save a large amount of repair and maintenance expenses.
Specific embodiment
1st, oil cooler recirculated water turnover water valve is closed.
2nd, flange at the oil cooler Inlet and outlet water mouth of pipe is disconnected, cleaning pump discharge pipe, oil cooler water outlet is connected at oil cooler water inlet Place's connection cleaning case return duct.Cleaning pump, cleaning case are arranged in vacant lot in steam turbine building.
3rd, in cleaning pump discharge pipe and the indirect return duct all the way of outlet valve, cleaned by exporting in valve regulation oil cooler Flow quantity.
4th, cleaning case moisturizing pipeline is connected with demineralized water nearby.
5th, steam is accessed in cleaning case（6-8kg/cm2）.
6th, demineralized water is injected, using being steam heated to 30 ~ 40 DEG C, circulation is set up, the loose dirty thing that comes off is removed；
7th, dodecane is added, the control of dodecane concentration is 0.1 ~ 0.3% in making cleaning fluid；Tertiary sodium phosphate is added, makes cleaning fluid PH value adds defoamer 9.5~10 according to foam situation（Tributyl phosphate）.Circulation flushing is discharged after 1 hour；Cleaning oil Mud, microorganism, alkali cleaning temperature are 30 ~ 40 DEG C, and the time is 1 hour；
8th, second injection demineralized water is rinsed, and using being steam heated to 50 ~ 60 DEG C, sets up circulation, makes pH value<9；
9th, corrosion inhibiter is added（Lan-826）, half an hour is circulated, start plus sulfamic acid, cleaning fluid acid concentration is more than 4%；Acid adding Gateway concentration difference is less than 0.6%, and defoamer is added according to foam situation（Tributyl phosphate）；Pickling temperature is 50 ~ 60 DEG C, when Between be 1 ~ 2 hour, to remove fouling and metal oxide；
10th, third time injection demineralized water is rinsed, and makes pH value>Untill 6.
Clean every 30 minutes sampling analyses once.When import and export acid concentration is close and no longer changes, acid cleaning terminates, Discharge pickle liquor.
The dosage of defoamer is rule of thumb or the conventional wisdom of those skilled in the art is added.

Claims (5)

1. a kind of generating set oil cooler chemical cleaning method, its technique is：Water is rinsed --- tertiary sodium phosphate+dodecane alkali Wash --- water flushing --- sulfamic acid pickling --- water flushing.
2. a kind of generating set oil cooler chemical cleaning method according to claim 1, it is characterized in that including following techniques step Suddenly：
（1）First time water is rinsed, and removes the loose dirty thing that comes off；
（2）Alkali cleaning, removes greasy filth, microorganism：First plus tertiary sodium phosphate to the pH value of cleaning fluid is 9.5~10, then plus dodecane, The concentration of dodecane in cleaning fluid is set to be 0.1~0.3%, alkali cleaning temperature is 30 ~ 40 DEG C, and the time is 1 hour,；
（3）Second water is rinsed, and makes pH value<9；
（4）Pickling, removes fouling and metal oxide：First add sulfamic acid, make cleaning fluid concentration containing sulfamic acid be 4~ 6%；After add corrosion inhibiter, make cleaning fluid be 0.30% containing the concentration of corrosion inhibiter；Pickling temperature is 50 ~ 60 DEG C, and the time is 1 ~ 2 small When；
（5）Third time water is rinsed, and makes pH value>6.
3. a kind of generating set oil cooler chemical cleaning method according to claim 2, it is characterized in that the corrosion inhibiter is Lan-826。
4. a kind of generating set oil cooler chemical cleaning method according to claim 2, it is characterized in that in acid pickling step if Fe in cleaning fluid3+During not less than 50mg/L, reducing agent is added, make to reduce agent content for 0.20% carries out Fe in cleaning fluid3+Removal Cleaning, until Fe3+＜ 50mg/L.
5. a kind of generating set oil cooler chemical cleaning method according to claim 4, it is characterized in that the reducing agent is different Sodium ascorbate.
CN201710076532.7A 2017-02-13 2017-02-13 A kind of generating set oil cooler chemical cleaning method Pending CN106824889A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710076532.7A CN106824889A (en) 2017-02-13 2017-02-13 A kind of generating set oil cooler chemical cleaning method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710076532.7A CN106824889A (en) 2017-02-13 2017-02-13 A kind of generating set oil cooler chemical cleaning method

Publications (1)

Publication Number Publication Date
CN106824889A true CN106824889A (en) 2017-06-13

Family

ID=59128654

Family Applications (1)

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Country Status (1)

Country Link
CN (1) CN106824889A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6840251B2 (en) * 2002-04-30 2005-01-11 Nalco Company Methods of simultaneously cleaning and disinfecting industrial water systems
CN101608882A (en) * 2009-07-22 2009-12-23 瓮福（集团）有限责任公司 The method that a kind of condenser copper tube cleans
US20100000576A1 (en) * 2008-07-03 2010-01-07 Lurgi Psi, Inc. Method of Cleaning Beer Preheaters In An Ethanol Plant
JP2013234351A (en) * 2012-05-08 2013-11-21 Showa Co Ltd Cleaning agent and cleaning method for inner face of copper tube
CN103915950A (en) * 2014-03-21 2014-07-09 甘肃华杰环保科技有限公司 Cleaning technology of generator rotor water cooling system
CN106197139A (en) * 2016-06-30 2016-12-07 华电能源股份有限公司佳木斯热电厂 A kind of cleaning method for Thermal Corp's heat exchanger

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6840251B2 (en) * 2002-04-30 2005-01-11 Nalco Company Methods of simultaneously cleaning and disinfecting industrial water systems
US20100000576A1 (en) * 2008-07-03 2010-01-07 Lurgi Psi, Inc. Method of Cleaning Beer Preheaters In An Ethanol Plant
CN101608882A (en) * 2009-07-22 2009-12-23 瓮福（集团）有限责任公司 The method that a kind of condenser copper tube cleans
JP2013234351A (en) * 2012-05-08 2013-11-21 Showa Co Ltd Cleaning agent and cleaning method for inner face of copper tube
CN103915950A (en) * 2014-03-21 2014-07-09 甘肃华杰环保科技有限公司 Cleaning technology of generator rotor water cooling system
CN106197139A (en) * 2016-06-30 2016-12-07 华电能源股份有限公司佳木斯热电厂 A kind of cleaning method for Thermal Corp's heat exchanger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
周本省: "工业冷却水系统的化学清洗", 《腐蚀与防护》 *

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Application publication date: 20170613