CN103272805B - Cleaning method of cooling water system in converter valve - Google Patents

Cleaning method of cooling water system in converter valve Download PDF

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Publication number
CN103272805B
CN103272805B CN201310205304.7A CN201310205304A CN103272805B CN 103272805 B CN103272805 B CN 103272805B CN 201310205304 A CN201310205304 A CN 201310205304A CN 103272805 B CN103272805 B CN 103272805B
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China
Prior art keywords
cooling water
converter valve
water pipe
cleaning
water
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CN201310205304.7A
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CN103272805A (en
Inventor
郭新茹
何铁祥
冯兵
徐松
刘凯
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State Grid Hunan Electric Power Co Ltd
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Hunan Province Xiangdian Test & Research Institute Co Ltd
SCIENCE RESEARCH INSTITUTE OF HUNAN ELECTRIC POWER Co Ltd
State Grid Corp of China SGCC
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Abstract

The invention discloses a cleaning method of a cooling water system in a converter valve. The cleaning method includes the steps: (1) nitrogen flows are jet to blow a cooling water pipe cavity of the cooling water system in the converter valve, the pressure of nitrogen is 0.5MPa, and blowing time is 0.5-1h; (2) tap water flows through a cation resin filling bed, an anion resin filling bed and a cation resin and anion resin mixed bed to become demineralized water; (3) the demineralized water is used for cleaning the cooling water pipe cavity blown in the step (1); (4) sulfamic acid, citric acid and corrosion inhibitor are prepared and then added to the demineralized water, and the step (3) is repeated; (5) the step (1) is repeated; (6) cleaning is carried out for 0.5h. According to the cleaning method, the problem of poor heat dissipation of an element is solved, and safety and stability of operation of a super-high voltage/ extra-high voltage convertor station are improved; the problem of poor heat dissipation of a thyristor can be solved, and replacement of a large amount of equipment is avoided; the cleaning process is safe, reliable, economical and feasible.

Description

Converter valve inner cooling water cleaning systems method
Technical field
The invention belongs to high-tension electricity transportation art, particularly relate to a kind of cleaning method being applicable to the converter valve inner cooling water system of ultra-high/extra-high voltage current conversion station.
Background technology
Ultra-high/extra-high voltage current conversion station is the core facility of direct current power transmission network, and converter valve is the nucleus equipment of direct current power transmission network.Thyristor in converter valve produces a large amount of heat at running, if it is bad to dispel the heat, the temperature of chip exceedes the highest permission temperature value, and the change of current performance of converter valve will be suffered to worsen and even be damaged.So, improvement must be imposed to existing radiating mode, select more reasonably to design, the change of current ability of the IGCT in converter valve just can be made to obtain and fully play, thus improve the reliability of converter valve.The radiating mode of traditional converter valve thyristor generally selects water-cooling pattern.But, foreign ion in water can produce galvano-cautery and electric leakage under high voltages, in addition the material that the inner cooling water system long-play of converter valve also exists to a certain degree is corroded and deposition conditions, there is converter valve inner cooling water system jams, leak a class abnormal problem, causes the accident of Thyristor overheated initiation direct current power transmission network whole system forced outage.The fault that this kind of abnormal problem of converter valve inner cooling water system is formed has two types: a type is, the cooling water pipe of converter valve inner cooling water system, by foreign matters from being blocked, causes water-cooled damping resistance, reactor dispel the heat bad and damage; Another kind of type is that the screening electrodes seal washer of converter valve inner cooling water system is corroded, and cause cooling water pipe joint to leak, sealability completely loses.And traditional solution is exactly between current conversion station overhaul time, change above-mentioned by the element damaged, though this solution can reduce fault occurrence probability, less economical, and the system cloud gray model at all can not removing direct current power transmission network normalization supervision and management aspect threatens.
Summary of the invention
The technical problem to be solved in the present invention is, for the backward situation of prior art, provides a kind of converter valve inner cooling water cleaning systems method.Use the converter valve inner cooling water system of the method periodic cleaning ultra-high/extra-high voltage current conversion station, effectively can solve the bad and seal washer of IGCT heat radiation that converter valve inner cooling water system causes because of corrosion and scaling, deposition and to be corroded the direct current electrical transmission network systems fault caused.
Technical scheme of the present invention is, the above-mentioned converter valve inner cooling water cleaning systems method provided comprises the steps:
(1), between the converter valve inner cooling water system blackout turn(a)round of ultra-high/extra-high voltage current conversion station to be cleaned, by the input of the input termination peripheral hardware nitrogen supply (NS) tank spray gun of the cooling water pipe of described converter valve inner cooling water system, the water (flow) direction of cooling water when working by converter valve, start the cooling water pipe tube chamber of lance ejection purged with nitrogen flow converter valve inner cooling water system, maintain nitrogen pressure at 0.5MPa, purge time 0.5 ~ 1h, make to be deposited on fine particulates on the IGCT surface in cooling water pipe luminal surface and cooling water pipe and loose shape corrosion product to be all blown away cleaning,
(2) water 10m is taken from 3flow through positive resin packed bed successively, negative resin packed bed, yin and yang resin mixed bed become demineralized water.The water outlet conductance of wherein said negative resin packed bed is less than 5 μ S/cm, and the water outlet conductance of yin and yang resin mixed bed is less than 0.15 μ S/cm;
(3), the water (flow) direction of cooling water when also working by converter valve as described in step (1), use step (2) demineralized water that obtains with conventional open type cleaning way, the water (flow) direction or in the other direction of cooling water when working by converter valve, alternately rinse the cooling water pipe tube chamber through the purged converter valve inner cooling water system of step (1), make the loose shape corrosion product still remained in after step (1) purges on the IGCT surface in cooling water pipe luminal surface and cooling water pipe meet with secondary to remove, visually observe less than granule foreign until described cooling water pipe luminal surface and IGCT surface are washed into.Then use demineralized water with conventional enclosed cleaning way, the water (flow) direction or in the other direction of cooling water when work by converter valve, the alternately cooling water pipe tube chamber of flushing converter valve inner cooling water system.Open type cleaning way like this and enclosed cleaning way cycle alternation rinse the cooling water pipe tube chamber of converter valve inner cooling water system.Until open type cleaning way and enclosed cleaning way respectively complete at least three times or scavenging period respectively reaches 3 ~ 4h;
(4), raw material is equipped with as following weight percent:
By join first three plant raw material add described demineralized water, obtain cleaning solution.Then use institute obtain in cleaning solution replacement step (3) demineralized water repetition step (3);
(5), repeat step (1), but nitrogen pressure maintains 0.2MPa, purge time is 0.25h only;
(6), use step (2) demineralized water that obtains, with conventional open type backwashing manner, continue the IGCT surface 0.5h rinsed in the cooling water pipe tube chamber and cooling water pipe of the purged converter valve inner cooling water system of step (5).
The invention has the beneficial effects as follows:
The cooling water pipe that 1, effectively can solve converter valve inner cooling water system is caused by foreign matters from being blocked the element radiatings such as water-cooled damping resistance, reactor bad and causes the problem of damage, improves the safety and stability that ultra-high/extra-high voltage current conversion station runs;
2, periodic cleaning can solve the not smooth impaired problem of IGCT heat radiation caused because of corrosion deposition effectively, avoids the delayed immeasurable loss causing large batch facility to have to change of problem discover;
3, cleaning process does not cause any damage to converter valve inner cooling water system and IGCT, safe and reliable, economically feasible.
Detailed description of the invention
Embodiment 1:
(1), between the converter valve inner cooling water system blackout turn(a)round of ultra-high/extra-high voltage current conversion station to be cleaned, by the input of the input termination peripheral hardware nitrogen supply (NS) tank spray gun of the cooling water pipe of described converter valve inner cooling water system, the water (flow) direction of cooling water when working by converter valve, start the cooling water pipe tube chamber of lance ejection purged with nitrogen flow converter valve inner cooling water system, maintain nitrogen pressure at 0.5MPa, purge time 0.5h, make to be deposited on fine particulates on the IGCT surface in cooling water pipe luminal surface and cooling water pipe and loose shape corrosion product to be all blown away cleaning,
(2) water 10m is taken from 3flow through positive resin packed bed successively, negative resin packed bed, yin and yang resin mixed bed become demineralized water.Wherein said, described positive resin packed bed adopts commercially available Hunan Province Xiangdian Test & Research Institute Co., Ltd. to produce HXZS-2Y type positive resin packed bed; Described negative resin packed bed adopts commercially available Hunan Province Xiangdian Test & Research Institute Co., Ltd. to produce HXZS-2Y type negative resin packed bed, and water power is led and is less than 5 μ S/cm; Described yin and yang resin mixed bed adopts commercially available Hunan Province Xiangdian Test & Research Institute Co., Ltd. to produce HXZS-2H type type yin and yang resin mixed bed, and water outlet conductance is less than 0.15 μ S/cm;
(3), the water (flow) direction of cooling water when also working by converter valve as described in step (1), use step (2) demineralized water that obtains with conventional open type cleaning way, the water (flow) direction or in the other direction of cooling water when working by converter valve, alternately rinse the cooling water pipe tube chamber through the purged converter valve inner cooling water system of step (1), make the loose shape corrosion product still remained in after step (1) purges on the IGCT surface in cooling water pipe luminal surface and cooling water pipe meet with secondary to remove, visually observe less than granule foreign until described cooling water pipe luminal surface and IGCT surface are washed into.Then use demineralized water with conventional enclosed cleaning way, the water (flow) direction or in the other direction of cooling water when work by converter valve, the alternately cooling water pipe tube chamber of flushing converter valve inner cooling water system.Open type cleaning way like this and enclosed cleaning way cycle alternation rinse the cooling water pipe tube chamber of converter valve inner cooling water system.Until open type cleaning way and enclosed cleaning way respectively complete three times;
(4), raw material is equipped with by following weight portion:
By join first three plant raw material add described demineralized water, obtain cleaning solution.Then use institute obtain in cleaning solution replacement step (3) demineralized water repetition step (3);
(5), repeat step (1), but nitrogen pressure maintains 0.2MPa, purge time is 0.25h only;
(6), use step (2) demineralized water that obtains, with conventional open type backwashing manner, continue the IGCT surface 0.5h rinsed in the cooling water pipe tube chamber and cooling water pipe of the purged converter valve inner cooling water system of step (5).
Embodiment 2:
(1) between the converter valve inner cooling water system blackout turn(a)round of, ultra-high/extra-high voltage current conversion station to be cleaned, by the input of the input termination peripheral hardware nitrogen supply (NS) tank spray gun of the cooling water pipe of described converter valve inner cooling water system, the water (flow) direction of cooling water when working by converter valve, start the cooling water pipe tube chamber of lance ejection purged with nitrogen flow converter valve inner cooling water system, maintain nitrogen pressure at 0.5MPa, purge time 1h, makes to be deposited on fine particulates on the IGCT surface in cooling water pipe luminal surface and cooling water pipe and loose shape corrosion product and to be all blown away cleaning;
Step (2) is with embodiment 1;
(3), the water (flow) direction of cooling water when also working by converter valve as described in step (1), use step (2) demineralized water that obtains with conventional open type cleaning way, the water (flow) direction or in the other direction of cooling water when working by converter valve, alternately rinse the cooling water pipe tube chamber through the purged converter valve inner cooling water system of step (1), make the loose shape corrosion product still remained in after step (1) purges on the IGCT surface in cooling water pipe luminal surface and cooling water pipe meet with secondary to remove, visually observe less than granule foreign until described cooling water pipe luminal surface and IGCT surface are washed into.Then use demineralized water with conventional enclosed cleaning way, the water (flow) direction or in the other direction of cooling water when work by converter valve, the alternately cooling water pipe tube chamber of flushing converter valve inner cooling water system.Open type cleaning way like this and enclosed cleaning way cycle alternation rinse the cooling water pipe tube chamber of converter valve inner cooling water system.Until open type cleaning way and enclosed cleaning way scavenging period respectively reach 3 ~ 4h;
(4), raw material is equipped with by following weight portion:
By join first three plant raw material add described demineralized water, obtain cleaning solution.Then use institute obtain in cleaning solution replacement step (3) demineralized water repetition step (3);
Step (5) ~ (6) are with embodiment 1.

Claims (1)

1. a converter valve inner cooling water cleaning systems method, the method comprises the steps:
(1), between the converter valve inner cooling water system blackout turn(a)round of ultra-high/extra-high voltage current conversion station to be cleaned, by the input of the input termination peripheral hardware nitrogen supply (NS) tank spray gun of the cooling water pipe of described converter valve inner cooling water system, the water (flow) direction of cooling water when working by converter valve, start the cooling water pipe tube chamber of lance ejection purged with nitrogen flow converter valve inner cooling water system, maintain nitrogen pressure at 0.5MPa, purge time 0.5 ~ 1h, make to be deposited on fine particulates on the IGCT surface in cooling water pipe luminal surface and cooling water pipe and loose shape corrosion product to be all blown away cleaning,
(2) water 10m is taken from 3flow through positive resin packed bed successively, negative resin packed bed, yin and yang resin mixed bed become demineralized water, the water outlet conductance of wherein said negative resin packed bed is less than 5 μ S/cm, and the water outlet conductance of yin and yang resin mixed bed is less than 0.15 μ S/cm;
(3), the water (flow) direction of cooling water when also working by converter valve as described in step (1), use step (2) demineralized water that obtains with conventional open type cleaning way, the water (flow) direction or in the other direction of cooling water when working by converter valve, alternately rinse the cooling water pipe tube chamber through the purged converter valve inner cooling water system of step (1), make the loose shape corrosion product still remained in after step (1) purges on the IGCT surface in cooling water pipe luminal surface and cooling water pipe meet with secondary to remove, visually observe less than granule foreign until described cooling water pipe luminal surface and IGCT surface are washed into, then use demineralized water with conventional enclosed cleaning way, the water (flow) direction or in the other direction of cooling water when working by converter valve, alternately rinse the cooling water pipe tube chamber of converter valve inner cooling water system, open type cleaning way like this and enclosed cleaning way cycle alternation rinse the cooling water pipe tube chamber of converter valve inner cooling water system, until open type cleaning way and enclosed cleaning way respectively complete at least three times or scavenging period respectively reaches 3 ~ 4h,
(4), raw material is equipped with as following weight percent:
By join first three plant raw material add described demineralized water, obtain cleaning solution.Then use institute obtain in cleaning solution replacement step (3) demineralized water repetition step (3);
(5), repeat step (1), but nitrogen pressure maintains 0.2MPa, purge time is 0.25h only;
(6), use step (2) demineralized water that obtains, with conventional open type backwashing manner, continue the IGCT surface 0.5h rinsed in the cooling water pipe tube chamber and cooling water pipe of the purged converter valve inner cooling water system of step (5).
CN201310205304.7A 2013-05-29 2013-05-29 Cleaning method of cooling water system in converter valve Active CN103272805B (en)

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103934239B (en) * 2014-04-08 2016-08-17 国家电网公司 A kind of converter valve screening electrodes regenerating unit and method
CN105821399B (en) * 2016-05-27 2018-04-13 国家电网公司 The corrosion inhibition method and coater of converter valve aluminum radiating seat
CN106277213A (en) * 2016-09-12 2017-01-04 国家电网公司 A kind of extra-high voltage direct current converter valve platinum electrode electrochemical descaling method
CN106783047A (en) * 2017-02-20 2017-05-31 中山市鑫中亚电源科技有限公司 A kind of water-cooled transformer magnetism servo-electric motor water-cooling
CN107626699B (en) * 2017-09-20 2020-04-24 宁德市凯欣电池材料有限公司 Cleaning process for electrolyte barrel
CN108339795A (en) * 2018-01-05 2018-07-31 国网浙江省电力有限公司电力科学研究院 A kind of chemistry and electrochemistry combined cleaning technique of valve cooling system screening electrodes
CN108080333A (en) * 2018-01-08 2018-05-29 长沙理工大学 A kind of valve cooling system screening electrodes on-line cleaning method
CN111662687A (en) * 2020-05-25 2020-09-15 河北冀研能源科学技术研究院有限公司 Novel cooling medium for high-voltage direct-current transmission converter valve

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US5885364A (en) * 1991-05-16 1999-03-23 H.E.R.C. Products Incorporated Method of cleaning and maintaining potable water distribution pipe systems
CN101327488A (en) * 2008-08-01 2008-12-24 天津二十冶建设有限公司 Method for cleaning hydraulic tubing
CN101585038A (en) * 2009-06-30 2009-11-25 四川科新机电股份有限公司 Stainless steel pipe cleaning method
CN102489480A (en) * 2011-12-16 2012-06-13 安徽康迪纳电力科技有限责任公司 Chemical cleaning process of oil system of large equipment
CN103115505A (en) * 2013-02-28 2013-05-22 宁夏宝塔石化集团有限公司 New efficient closed-cycle air cooling process for PTA (pure terephthalic acid) device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5885364A (en) * 1991-05-16 1999-03-23 H.E.R.C. Products Incorporated Method of cleaning and maintaining potable water distribution pipe systems
CN101327488A (en) * 2008-08-01 2008-12-24 天津二十冶建设有限公司 Method for cleaning hydraulic tubing
CN101585038A (en) * 2009-06-30 2009-11-25 四川科新机电股份有限公司 Stainless steel pipe cleaning method
CN102489480A (en) * 2011-12-16 2012-06-13 安徽康迪纳电力科技有限责任公司 Chemical cleaning process of oil system of large equipment
CN103115505A (en) * 2013-02-28 2013-05-22 宁夏宝塔石化集团有限公司 New efficient closed-cycle air cooling process for PTA (pure terephthalic acid) device

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Address after: 100033 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Co-patentee after: Power Science Research Institute of Hunan Electric Power Co., Ltd.

Patentee after: State Grid Corporation of China

Co-patentee after: Hunan Province Xiangdian Test & Research Institute Co., Ltd.

Address before: 100033 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Co-patentee before: Electric Power Research Institute, State Grid Hunan Electric Power Company

Patentee before: State Grid Corporation of China

Co-patentee before: Hunan Province Xiangdian Test & Research Institute Co., Ltd.

Address after: 100033 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Co-patentee after: Electric Power Research Institute, State Grid Hunan Electric Power Company

Patentee after: State Grid Corporation of China

Co-patentee after: Hunan Province Xiangdian Test & Research Institute Co., Ltd.

Address before: 100033 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Co-patentee before: Science Research Institute of Hunan Electric Power Co., Ltd.

Patentee before: State Grid Corporation of China

Co-patentee before: Hunan Province Xiangdian Test & Research Institute Co., Ltd.

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Effective date of registration: 20180807

Address after: 410004 398 new Shao Dong Road, Tianxin District, Changsha, Hunan

Co-patentee after: Power Science Research Institute of Hunan Electric Power Co., Ltd.

Patentee after: State Grid Hunan Electric Power Co., Ltd.

Co-patentee after: State Grid Corporation of China

Address before: 100033 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Co-patentee before: Power Science Research Institute of Hunan Electric Power Co., Ltd.

Patentee before: State Grid Corporation of China

Co-patentee before: Hunan Province Xiangdian Test & Research Institute Co., Ltd.

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