CN102659271A - Method for treating cooling water in generators of 600 MW and above - Google Patents
Method for treating cooling water in generators of 600 MW and above Download PDFInfo
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- CN102659271A CN102659271A CN2012101507902A CN201210150790A CN102659271A CN 102659271 A CN102659271 A CN 102659271A CN 2012101507902 A CN2012101507902 A CN 2012101507902A CN 201210150790 A CN201210150790 A CN 201210150790A CN 102659271 A CN102659271 A CN 102659271A
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Abstract
The invention discloses a method for treating cooling water in generators of 600 MW and above. The method comprises the following steps of: (1) replacing a bypass small mixing bed in a cooling water tank in a to-be-treated generator of 600 MW and above with an electric demineralizer, wherein a metering pump and a pH gauge are connected in parallel to the input port of the electric demineralizer; the pH gauge is further connected to an electrical conductivity gauge; and another pH gauge and another electrical conductivity gauge are connected in series to the output port of the electric demineralizer; (2) adjusting the flow rate of the cooling water and determining drainage time; (3) adjusting the pH value of the cooling water at the input port to be consistent with that at the output port; (4) collecting high deviation of the electrical conductivity of cooling water in the generator; and (5) stopping or adding in sodium hydroxide solution until pH value is in the range of 8.0-9.0 and consistent with that at the output port. The method has the following advantages that the quality of the cooling water measures up to national regulations; the service life of the generator can be prolonged by 10 years; and with unattended operation, the labor and materials are saved, and the method is efficient and convenient.
Description
Technical field
The invention belongs to the electrical engineering field, be specifically related to the treatment process of a kind of 600MW and above generator internal cooling water.
Background technology
Be installed in the 600MW of nuclear power plant, thermal power plant and hydroelectric power plant and the stator winding of above high-rating generator and the rotor winding of 600MW and above large-scale double water innercooling electric generator and adopt high purity water circulation cooling usually.Generator internal cooling water water quality is defective will to cause generator hollow core copper conductor corrosion and scaling and obstruction.Stop up and to cause generator line rod local overheating when serious even burn, often compelledly promptly reduce load or shut down maintenance.For example Yueyang, Huaneng Group power plant is defective with regard to once taking place because of cooling water quality, corrodes the major accident that stops up the hollow copper conductor and cause generator to be burnt.Therefore, in order to guarantee the safety and economic operation of thermal power plant, must handle generator internal cooling water.Generator internal cooling water treatment process commonly used has following several kinds:
1, adds BTA (English full name is 1,2, the abbreviation of 3-Benzotrialole, its Chinese translation is a benzotriazole) and verivate inhibiter thereof, cause depositing because inhibiter is prone to take place complex reaction with cupric ion, so this method is eliminated;
2, purify water through zwitterion in the resin removal water.Because the water coolant work-ing life after this kind method purifies is some months only, needs frequent change, so method is less economical and complicated operation and inadvisable;
3, little alkalinisation treatment method; The used resin of this method work-ing life was above 1 year; But the back of losing efficacy is directly discarded, causes the waste of a large amount of resins, and is difficult to satisfy among high-rating generator internal cooling water quality and the systems technology requirement DL/T801-2010 of the new promulgation of country the pH value in the requirement of 8.0～9.0 scopes.
Summary of the invention
The technical problem that the present invention will solve is; Exist the cooling water quality that can not make after the processing to the treatment process of existing 600MW and above generator internal cooling water and satisfy national up-to-date issuing standard, resin frequent change, less economical defective; The treatment process of a kind of improved 600MW and above generator internal cooling water is provided; Use this method can make the pH value of generator internal cooling water under dissolved oxygen conditions, remain on 8.0～9.0 scopes; And needn't the frequent change resin, labor and material saving, very economical.
Technical solution of the present invention is that the above-mentioned 600MW that is provided and the treatment process of above generator internal cooling water are to be following steps:
(1), with the little mixed bed of the bypass in pending 600MW and the above generator internal cooling water case, [(English full name is the abbreviation of Electrodeionization to EDI to be replaced by an electric salt remover that yin and yang resin is housed.）】。Can conveniently measure volume pump and a pH table of 0.5～1.0% mass concentration sodium hydroxide (NaOH) solution one of the input aperture of this electric salt remover parallel connection.The peak flow of said volume pump is 1.0L/h.The other end of said pH table also connects a conductivity table.And at the delivery port of said electric salt remover also connect successively pH table and a conductivity table;
(2), comparison is connected in the specific conductivity of the conductivity table specific conductivity that shows and the conductivity table demonstration that is connected in this electric salt remover delivery port of step (1) the electric salt remover input aperture of changing.Regulate the flow of the water coolant of said electric salt remover input aperture, the cooling water flow regulation range is 1.0～2.0t/h.Control the scope of the specific conductivity of this electric salt remover delivery port, the span of control of said specific conductivity is 0.4～2.0 μ S/cm.Use ordinary method to confirm the blowing time of said electric salt remover;
(3), take to add in the delivery port toward said electric salt remover the mode of 0.5～1.0% mass concentration sodium hydroxide solution, regulate the pH value of water coolant of the delivery port of this electric salt remover, water coolant pH value regulation range is 8.0～9.0.Comparison is connected in the pH value of the pH table demonstration of pH value that the pH table of the input aperture of above-mentioned electric salt remover shows and the delivery port that is connected in this electric salt remover.Consistent toward interior 0.5～1.0% mass concentration sodium hydroxide solution that adds of the delivery port of said electric salt remover until the pH value of the pH table demonstration of the pH value of the pH of the input aperture of above-mentioned electric salt remover table demonstration and the delivery port that is connected in this electric salt remover.So the add-on of 0.5～1.0% mass concentration sodium hydroxide solution is confirmed by the pH value of the final water coolant of confirming;
(4), the conductivity value that conductivity table showed when the input aperture of above-mentioned electric salt remover surpasses 2.0 μ S/cm, shows that promptly the specific conductivity of generator internal cooling water is higher, select the high position that one of following two kinds of measures correct the generator internal cooling water specific conductivity and depart from:
1), uses ordinary method to change generator internal cooling water and return 0.4～2.0 μ S/cm scope until the conductivity value that this conductivity table showed;
2), use ordinary method to get rid of the interior dirt of said electric salt remover and return 0.4～2.0 μ S/cm scope until the conductivity value that this conductivity table showed;
(5), the pH value that is shown when the pH of the input aperture of above-mentioned electric salt remover table is greater than 9.0; The pH value that promptly shows generator internal cooling water is higher, stops the adding of the past said electric salt remover delivery port of 0.5～1.0% mass concentration sodium hydroxide solution in the above-mentioned steps (3); The pH value that is shown when the pH of the input aperture of above-mentioned electric salt remover table is less than 8.0; The pH value that promptly shows generator internal cooling water is on the low side; Continue to add 0.5～1.0% mass concentration sodium hydroxide solution toward the delivery port of said electric salt remover; The pH value that shows until the pH of said electric salt remover input aperture table falls into the water coolant pH value regulation range of step (3) said 8.0～9.0, and the pH value of showing to be shown with the pH of said electric salt remover delivery port is consistent.
The invention has the beneficial effects as follows:
(1), water quality is good.Can make the standard that water conductivity reaches ultrapure water that of electric salt remover; Through the amount of control adding 0.5～1.0% mass concentration sodium hydroxide solution, the generator internal cooling water water quality that makes generator internal cooling water water quality satisfy " high-rating generator internal cooling water quality and systems technology require (DL/T801-2010) " of country's promulgation is stipulated;
(2), use economy.Can realize the regeneration of exhausted resin in the body in the time of the electric salt remover operation, make prolong 10 year or more the work-ing life of resin thus, economic benefit is obvious;
(3), efficient convenient.The regeneration of the exhausted resin of electric salt remover does not need manual operation, can realize full-automatic unmanned on duty, labor and material saving.
Embodiment
Embodiment 1:
(1), with the little mixed bed of the bypass in the pending 600MW generator internal cooling water case, be replaced by an electric salt remover that yin and yang resin is housed, the processing water yield that this electric salt remover adopts Lai Te Rider, Dalian company to produce is the electric salt remover of 2t/h.Can conveniently measure volume pump and a pH table of 0.5～1.0% mass concentration sodium hydroxide solution one of the input aperture of this electric salt remover parallel connection.The other end of said pH table also connects a conductivity table.And at the delivery port of said electric salt remover also connect successively pH table and a conductivity table.The above-mentioned volume pump that can conveniently measure 0.5～1.0% mass concentration sodium hydroxide solution, employing model are that the Germany of Gamma/L produces the special electromagnetic drive diaphragm type of general sieve name precision metering pump, and the top hole pressure of this volume pump is 1.0MPa, flow 0.76L/h.The polymetron 9135 type pH table that above-mentioned pH table all adopts U.S. Hash company to produce.The polymetron 9125 type electric conductivity tables that above-mentioned conductivity table all adopts U.S. Hash company to produce;
(2), comparison is connected in the specific conductivity of the conductivity table specific conductivity that shows and the conductivity table demonstration that is connected in this electric salt remover delivery port of step (1) the electric salt remover input aperture of changing.Regulate the flow of the water coolant of said electric salt remover input aperture, the cooling water flow regulation range is 1.0～2.0t/h.Control the scope of the specific conductivity of this electric salt remover delivery port, the span of control of said specific conductivity is 0.4～2.0 μ S/cm.Use ordinary method to confirm the blowing time of said electric salt remover;
(3), take to add in the delivery port toward said electric salt remover the mode of 0.5～1.0% mass concentration sodium hydroxide solution, regulate the pH value of water coolant of the delivery port of this electric salt remover, water coolant pH value regulation range is 8.0～9.0.Comparison is connected in the pH value of the pH table demonstration of pH value that the pH table of the input aperture of above-mentioned electric salt remover shows and the delivery port that is connected in this electric salt remover.Consistent toward interior 0.5～1.0% mass concentration sodium hydroxide solution that adds of the delivery port of said electric salt remover until the pH value of the pH table demonstration of the pH value of the pH of the input aperture of above-mentioned electric salt remover table demonstration and the delivery port that is connected in this electric salt remover;
(4), the conductivity value that conductivity table showed when the input aperture of above-mentioned electric salt remover surpasses 2.0 μ S/cm, use ordinary method to change generator internal cooling water and return 0.4～2.0 μ S/cm scope until the conductivity value that this conductivity table showed:
(5), the pH value that shown when the pH of the input aperture of above-mentioned electric salt remover table is greater than 9.0, stops the adding of the past said electric salt remover delivery port of 0.5～1.0% mass concentration sodium hydroxide solution in the above-mentioned steps (3); The pH value that is shown when the pH of the input aperture of above-mentioned electric salt remover table is less than 8.0; Continue to add 0.5～1.0% mass concentration sodium hydroxide solution toward the delivery port of said electric salt remover; The pH value that shows until the pH of said electric salt remover input aperture table falls into the water coolant pH value regulation range of step (3) said 8.0～9.0, and the pH value of showing to be shown with the pH of said electric salt remover delivery port is consistent.
Embodiment 2:
Step (1)～(3) are with embodiment 1;
(4), the conductivity value that conductivity table showed when the input aperture of above-mentioned electric salt remover surpasses 2.0 μ S/cm, uses ordinary method to get rid of that dirt returns 0.4～2.0 μ S/cm scope until the conductivity value that this conductivity table showed in the said electric salt remover;
Step (5) is with embodiment 1.
Claims (1)
1. the treatment process of a 600MW and above generator internal cooling water, this method is following steps:
(1), with the little mixed bed of the bypass in pending 600MW and the above generator internal cooling water case; Be replaced by an electric salt remover that yin and yang resin is housed; Can conveniently measure volume pump and a pH table of 0.5～1.0% mass concentration sodium hydroxide (NaOH) solution one of the input aperture of this electric salt remover parallel connection; The peak flow of said volume pump is 1.0L/h; The other end of said pH table also connects a conductivity table, and at the delivery port of said electric salt remover also connect successively a pH table and a conductivity table;
(2), comparison is connected in the specific conductivity of the conductivity table specific conductivity that shows and the conductivity table demonstration that is connected in this electric salt remover delivery port of step (1) the electric salt remover input aperture of changing; Regulate the flow of the water coolant of said electric salt remover input aperture; The cooling water flow regulation range is 1.0～2.0t/h; Control the scope of the specific conductivity of this electric salt remover delivery port, the span of control of said specific conductivity is 0.4～2.0 μ S/cm, uses ordinary method to confirm the blowing time of said electric salt remover;
(3), take in the delivery port of said electric salt remover, to add the mode of 0.5～1.0% mass concentration sodium hydroxide solution; Regulate the pH value of water coolant of the delivery port of this electric salt remover; Water coolant pH value regulation range is 8.0～9.0; Comparison is connected in the pH value that the pH table of pH value that the pH table of the input aperture of above-mentioned electric salt remover shows and the delivery port that is connected in this electric salt remover shows, the pH value that the pH that adds pH value that 0.5～1.0% mass concentration sodium hydroxide solution shows until the pH of the input aperture of above-mentioned electric salt remover table and the delivery port that is connected in this electric salt remover in the delivery port of said electric salt remover shows demonstration is consistent;
(4), the conductivity value that conductivity table showed when the input aperture of above-mentioned electric salt remover surpasses 2.0 μ S/cm, select the high position that one of following two kinds of measures correct the generator internal cooling water specific conductivity and depart from:
1), uses ordinary method to change generator internal cooling water and return 0.4～2.0 μ S/cm scope until the conductivity value that this conductivity table showed;
2), use ordinary method to get rid of the interior dirt of said electric salt remover and return 0.4～2.0 μ S/cm scope until the conductivity value that this conductivity table showed;
(5), the pH value that shown when the pH of the input aperture of above-mentioned electric salt remover table is greater than 9.0, stops the adding of the past said electric salt remover delivery port of 0.5～1.0% mass concentration sodium hydroxide solution in the above-mentioned steps (3); The pH value that is shown when the pH of the input aperture of above-mentioned electric salt remover table is less than 8.0; Continue to add 0.5～1.0% mass concentration sodium hydroxide solution toward the delivery port of said electric salt remover; The pH value that shows until the pH of said electric salt remover input aperture table falls into the water coolant pH value regulation range of step (3) said 8.0～9.0, and the pH value of showing to be shown with the pH of said electric salt remover delivery port is consistent.
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| CN 201210150790 CN102659271B (en) | 2012-05-16 | 2012-05-16 | Method for treating cooling water in generators of 600 MW and above |
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| CN 201210150790 CN102659271B (en) | 2012-05-16 | 2012-05-16 | Method for treating cooling water in generators of 600 MW and above |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631816A (en) * | 2003-12-24 | 2005-06-29 | 蒋如丰 | Method for recovering and treating boiler sewage of large-scale steam power plant |
| CN1843954A (en) * | 2006-04-20 | 2006-10-11 | 裴锋 | Method for conditioning cool water quality in large-sized power generator and monitor control system |
| CN1896009A (en) * | 2006-06-09 | 2007-01-17 | 江西省电力科学研究院 | Alkalescent water-quality treatment and treating system for double-internal water-cooled generator |
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- 2012-05-16 CN CN 201210150790 patent/CN102659271B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631816A (en) * | 2003-12-24 | 2005-06-29 | 蒋如丰 | Method for recovering and treating boiler sewage of large-scale steam power plant |
| CN1843954A (en) * | 2006-04-20 | 2006-10-11 | 裴锋 | Method for conditioning cool water quality in large-sized power generator and monitor control system |
| CN1896009A (en) * | 2006-06-09 | 2007-01-17 | 江西省电力科学研究院 | Alkalescent water-quality treatment and treating system for double-internal water-cooled generator |
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Owner name: HU'NAN XIANGDIAN TRIAL RESEARCH TECHNOLOGY CO., LT Free format text: FORMER OWNER: HU'NAN XIANGDIAN TRIAL RESEARCH TECHNOLOGY CO., LTD. Effective date: 20121101 |
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Effective date of registration: 20121101 Address after: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha Applicant after: Science Research Institute of Hunan Electric Power Co., Ltd. Applicant after: Hunan Xiangdian Electric Power Text & Research Co., Ltd. Applicant after: State Grid Corporation of China Address before: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha Applicant before: Science Research Institute of Hunan Electric Power Co., Ltd. Applicant before: Hunan Xiangdian Electric Power Text & Research Co., Ltd. |
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Effective date of registration: 20180713 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: No. 79, Dongtang hydropower street, Changsha, Hunan Province Co-patentee before: Hunan Xiangdian Electric Power Text & Research Co., Ltd. Patentee before: Science Research Institute of Hunan Electric Power Co., Ltd. Co-patentee before: State Grid Corporation of China |
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