CN1126232C - Inner-cooling water ammonization fuzzy regulation and control method and its monitoring and control system - Google Patents
Inner-cooling water ammonization fuzzy regulation and control method and its monitoring and control system Download PDFInfo
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- CN1126232C CN1126232C CN 01138301 CN01138301A CN1126232C CN 1126232 C CN1126232 C CN 1126232C CN 01138301 CN01138301 CN 01138301 CN 01138301 A CN01138301 A CN 01138301A CN 1126232 C CN1126232 C CN 1126232C
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Abstract
The present invention discloses an inner-cooling water ammonization fuzzy regulation and control method for a large-sized generator and a monitoring and control system thereof. The method comprises the following steps that condensation water containing NH3 is supplied to an inner-cooling water tank after being processed by an ammonization small mixing bed; when the condensation water is not supplied, the ammonization small mixing bed is used for bypass self-purification; the time for opening a condensation water leading pipe value or an inlet and outlet value of the bypass ammonization small mixing bed, a valve for removing salt water and supplying water and a drain valve is determined according to the electric conductivity and the pH value of inner-cooling water. The monitoring and control system of the present invention comprises an inner-cooling water quality monitoring control unit of a main circulating system, a water supply and drain control unit and a bypass purifying control unit. The present invention can effectively control the corrosion of a hollow copper conducting wire of a generator, keep inner-cooling water quality to exist in a favorable state, and ensure the safe, economic and high-efficiency operation of the generator.
Description
Technical field
The present invention relates to a kind of high-rating generator inner cold water ammonium slowly-releasing regulation and control method and monitor control system thereof, belong to the electrical engineering field.
Background technology
Thermal power plant's generator unit stator winding and double water innercooling electric generator rotor winding adopt high purity water circulation cooling, and cooling water quality is subjected to oxygen and carbon dioxide pollution in the air and worsens, and causes the hollow copper conductor to corrode.The means of defence of taking usually at present be cooling water tank with nitrogen or hydrogen sealing and to inner cold water add MBT or corrosion inhibiter such as BTA and derivative thereof (see " generator coolant ", hydraulic and electric engineering publishing house, November nineteen ninety-five front page).Because the air-tightness of the inner cold water circulatory system and make-up water pipeline thereof is difficult to be guaranteed, thus carry out method seldom employing in engineering practice of air seal with nitrogen or hydrogen, and there is potential safety hazard in the use of hydrogen.The method of adding corrosion inhibiter such as BTA is comparatively commonly used, but its subject matter is: 1. add and its residual concentration in system of manual sampling analyzing and testing by artificial; 2. used corrosion inhibiter is a weak electrolyte, and neither one is suitable for the characteristic parameter of online detection, does not fit into automatic control; 3. used corrosion inhibiter is the organic substance that contains benzene ring structure, and formed diaphragm thermal resistance is bigger, is unfavorable for the cooling heat dissipation of generator copper conductor winding; 4. need often manually to add medicament to repair diaphragm.In fact, at present a lot of power plant do not take any adjusting control measure to the inner cold water of generator, the pH value of inner cold water is on the low side for a long time, Cu content often exceeds standard, and it is qualified to adopt the method for frequently changing water to keep conductivity, and this method does not solve the etching problem of copper conductor.The inner cold water quality problem becomes one of generator potential safety hazard, and has limited exerting oneself of generator.
Summary of the invention
The objective of the invention is to overcome the prior art shortcoming a kind of high-rating generator inner cold water ammonium slowly-releasing regulation and control method and monitor control system thereof are provided, so that effectively control the corrosion of generator hollow copper conductor, keep inner cold water water quality to be in good state, ensure generator safety, economy, efficient operation.More particularly, be to be generally after 8.8～9.2 contain the little mixed bed of the ammoniumization of ammonium condensate in the inner cold water bypass clean-up system and purify as a supplement that water adds the inner cold water water tank without the pH value that H-OH type high flow rate mixed bed is handled, with the inner cold water water quality adjustment to satisfactory scope with reach the purpose that inhibition hollow copper conductor corrodes.
The technical scheme of high-rating generator inner cold water ammonium slowly-releasing regulation and control method of the present invention is: will contain NH when regulation and control
3Condensate adds the inner cold water case again after the little mixed bed of ammoniumization purifies; When not replenishing condensate, the little mixed bed of ammoniumization is used for inner cold water bypass self-cleaning; PH with electric generator inner cooling water is adjusted to 8.0 to 9.0 whereby, and conductivity is controlled at below the 3.0 μ S/cm; Described regulation and control comprise: A, when major circulatory system inner cold water pH value is lower than 7.5 and conductivity＜3.0 μ S/cm, open the inlet valve and the outlet valve of the little mixed bed of condensate aqueduct valve and ammoniumization; B, when pH reaches 8.5, close above-mentioned valve; C, when conductivity surpasses 3.0 μ S/cm, but bypass valve and little mixed bed outlet valve are opened in pH＜8.5 o'clock; D, when conductivity surpasses 3.0 μ S/cm and pH＞8.5, or as conductivity＜3.0 μ S/cm but pH＞9.0 the time, unlatching demineralized water water compensating valve and blowdown valve, to conductivity be reduced to＜1.5 μ S/cm till.
Monitor control system of the present invention comprises by generator, the inner cold water case, major circulatory system with the circulating pump composition, by condensate refill flow meter, the moisturizing electromagnetically operated valve, the condensate moisturizing cleaning system of little mixed bed and electromagnetically operated valve composition and by demineralized water refill flow meter and water compensating valve, the moisturizing drainage that inner cold water case and blowdown flow meter and blowdown valve are formed reaches by electromagnetically operated valve, the bypass clean-up system that little mixed bed and electromagnetically operated valve are formed, it is characterized in that, the Monitoring and Controlling unit is by signal cable and conductivity meter, pH pH-value determination pH instrument connects and collection inner cold water water quality information, by signal cable and condensing water flow meter, the bleed water flowmeter is connected with demineralized water refill flow meter and gathers flow signal, is connected with electromagnetically operated valve and their are implemented control by data cable.In order to reduce inner cold water loss and moisturizing number of times, regularly water flowing sampling testing mode of batch (-type) is taked in the monitoring of inner cold water pH value and conductivity, and during the non-moisturizing, the assay intervals time is 2h～8h, testing result keeps as historical data, can be used for system works specificity analysis and problem diagnosis; During the moisturizing, continuous detecting.According to generator parameter height and inner cold water running situation, the conductivity upper limit can be controlled in 2.5 μ S/cm or below the 2.0 μ S/cm, when replenishing demineralized water, the conductivity lower limit can be made as 0.6 μ S/cm or 1.0 μ S/cm.
Characteristics such as one of additional water source of inner cold water, the oxygen content of utilizing it to have is low with the steam turbine condensate in the present invention, pH value height, low salinity, temperature are suitable; The condensate that to draw is handled through the little mixed bed of ammoniumization, removes the non-NH that may contain in the condensate
4The impurity that OH impurity and diversion tube wall may dissolve in; The little mixed bed of ammoniumization in this system also can be used for handling the bypass inner cold water and handles, and brings into play the bypass self-cleaning separately and regulates the effect of inner cold water pH value.These characteristics and the combination of technical conceive cleverly can guarantee that the quality of inner cold water satisfies the requirement of generator safety and economic operation to cooling water.
Description of drawings
Fig. 1 is a monitor control system schematic diagram of the present invention.
Embodiment
The monitor control system of realizing the inventive method among the figure is: 1, generator (stator coil winding), 2, the inner cold water case, 3, the inner cold water circulating pump.Inner cold water under the effect of water pump to the cooling that circulates of generator copper conductor.4, condensate refill flow meter, 5, the condensate water compensating valve, 6, the inner cold water bypass purifies the little mixed bed inlet valve of ammoniumization, 7, the little mixed bed of ammoniumization, 8, outlet valve.Under the control of Monitoring and Controlling unit (DCU) 9, condensate or bypass inner cold water are handled through the little mixed bed 7 of ammoniumization, return inner cold water case 2.According to default, under the control of measurement and control unit 9, regular open valve 12, system is from the source conductivity and the pH value of online conductivity meter 10 and online pH analyzer 11 collection inner cold waters.According to inner cold water water quality situation, under the control of measurement and control unit 9, carry out blowdown and the operation of additional demineralized water by valve 13 and valve 15; Blowdown flow rate is measured by flowmeter 16 by flowmeter 14, demineralized water rate of water make-up, carries out inner cold water case 2 water balances by measurement and control unit 9 and regulates.Above-mentioned valve is an electromagnetically operated valve.
The embodiment of monitoring and control method of the present invention: when regulation and control, will contain the NH that attracts by flowmeter 4 and electromagnetically operated valve 5 place pipelines
3Condensate is handled the back through the little mixed bed 7 of ammoniumization and is mended inner cold water case 2; When not mending condensate, the little mixed bed 7 of ammoniumization is used for the bypass self-cleaning; The pH value of regulator generator 1 inner cold water is between 8.0 to 9.0 whereby, and conductivity is below 3.0 μ S/cm.The ammonium slowly-releasing regulation and control method is: A, when major circulatory system inner cold water pH value is lower than 7.5 and conductivity＜3.0 μ S/cm, open the inlet valve 6 and the outlet valve 8 of the little mixed bed 7 of condensate aqueduct valve 5 and ammoniumization; B, when pH reaches 8.5, close above-mentioned valve; C, when conductivity surpasses 3.0 μ S/cm, but bypass valve 6 and little mixed bed outlet valve 8 are opened in pH＜8.5 o'clock; D, when conductivity surpasses 3.0 μ S/cm and pH＞8.5, or as conductivity＜3.0 μ S/cm but pH＞9.0 the time, unlatching demineralized water water compensating valve 15 and blowdown valve 13, to conductivity be reduced to＜1.5 μ S/cm till.Regularly water flowing sampling mode detection of batch (-type) is taked in the detection of inner cold water conductivity and pH value.Inner cold water conductivity parameter control is to determine that according to generator 's parameter height and the concrete technology of system the inner cold water conductivity upper limit can be set at 2.5 μ S/cm or 2.0 μ S/cm, and the lower limit of the conductivity during moisturizing can be set at 0.6 μ S/cm or 1.0 μ S/cm.The little mixed bed of ammoniumization of the present invention, promptly the ion exchange resin bed layer is made up of positive resin and negative resin, and positive resin is NH
4The type cation exchange resin; NH
4Type sun resin adopts the regeneration of high purity ammonium salting liquid; OH type resin adopts high purity N aOH regeneration; The proportioning of yin and yang resin is determined according to condensate and inner cold water water quality.
Claims (5)
1, a kind of high-rating generator inner cold water ammonium slowly-releasing regulation and control method is characterized in that: when regulation and control, will contain NH
3Condensate is handled the back through the little mixed bed of ammoniumization (7) and is mended inner cold water case (2); When not mending condensate, the little mixed bed of ammoniumization (7) is used for the bypass clean-up system self-cleaning; The pH value of regulator generator (1) inner cold water is between 8.0 to 9.0 whereby, and conductivity is controlled at below the 3.0 μ S/cm; Described regulation and control comprise: A, when major circulatory system inner cold water pH value is lower than 7.5 and conductivity＜3.0 μ S/cm, open little mixed (7) inlet valve (6) of condensate diversion pipe valve (5) and ammoniumization and outlet valve (8); B, when pH reaches 8.5, close above-mentioned valve; C, surpass 3.0 μ S/cm when conductivity, but bypass valve (5) and little mixed bed terminal valve (6), (8) are opened in pH＜8.5 o'clock; D, when conductivity surpasses 3.0 μ S/cm and pH＞8.5, or as conductivity＜3.0 μ S/cm but pH＞9.0 the time, unlatching demineralized water water compensating valve (15) and blowdown valve (13), to conductivity be reduced to＜1.5 μ S/cm till.
2, ammonium slowly-releasing regulation and control method according to claim 1 is characterized in that: regularly water flowing sampling mode detection of batch (-type) is taked in the detection of inner cold water conductivity and pH value.
3, ammonium slowly-releasing regulation and control method according to claim 1, it is characterized in that: inner cold water conductivity parameter control is to determine according to generator 's parameter height and the concrete technology of system, its inner cold water conductivity upper limit is set at 2.5 μ S/cm or 2.0 μ S/cm, and the lower limit set of the conductivity during moisturizing is 0.6 μ S/cm or 1.0 μ S/cm.
4, ammonium slowly-releasing regulation and control method according to claim 1 is characterized in that: it is made up of the little mixed bed of ammoniumization positive resin and negative resin, and positive resin is NH
4The type cation exchange resin, negative resin is the OH type anion exchange resin of no Cl type resin; The sun resin adopts the regeneration of high purity ammonium salting liquid; The proportioning of yin and yang resin is determined according to condensate and inner cold water water quality.
5, a kind of monitor control system of realizing the ammonium slowly-releasing regulation and control method of claim 1, it comprises by generator (1), inner cold water case (2), and the major circulatory system of circulating pump (3) composition, by condensate refill flow meter (4), moisturizing electromagnetically operated valve (5), the condensate moisturizing cleaning system of little mixed bed (7) and electromagnetically operated valve (8) composition and by demineralized water refill flow meter (16) and water compensating valve (15), the moisturizing drainage that inner cold water case (2) and blowdown flow meter (14) and blowdown valve (13) are formed reaches by electromagnetically operated valve (6), the bypass clean-up system that little mixed bed (7) and electromagnetically operated valve (8) are formed, it is characterized in that, Monitoring and Controlling unit (9) is by signal cable and conductivity meter (10), pH pH-value determination pH instrument (11) connects and collection inner cold water water quality information, by signal cable and condensing water flow meter (4), bleed water flowmeter (14) is connected with demineralized water refill flow meter (16) and gathers flow signal, by data cable and electromagnetically operated valve (5), (6), (8), (12), (13), (15) connect and their are implemented control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01138301 CN1126232C (en) | 2001-12-17 | 2001-12-17 | Inner-cooling water ammonization fuzzy regulation and control method and its monitoring and control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01138301 CN1126232C (en) | 2001-12-17 | 2001-12-17 | Inner-cooling water ammonization fuzzy regulation and control method and its monitoring and control system |
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| Publication Number | Publication Date |
|---|---|
| CN1354547A CN1354547A (en) | 2002-06-19 |
| CN1126232C true CN1126232C (en) | 2003-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01138301 Expired - Fee Related CN1126232C (en) | 2001-12-17 | 2001-12-17 | Inner-cooling water ammonization fuzzy regulation and control method and its monitoring and control system |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439462B (en) * | 2013-08-26 | 2015-11-11 | 国家电网公司 | A kind of power plant condensation water treatment high flow rate mixed bed resin regeneration dynamic monitoring method |
| CN104843827B (en) * | 2014-02-19 | 2017-01-11 | 华电章丘发电有限公司 | Small mixed bed resin online ammoniation and in vivo regeneration technology for generator internal cold water treatment |
| CN104030399B (en) * | 2014-05-12 | 2015-09-23 | 西安热工研究院有限公司 | A kind of electric generator inner cooling water treatment system and treatment process |
| CN104386795B (en) * | 2014-09-30 | 2017-01-18 | 中国神华能源股份有限公司 | Electric-generator internal cooling water, application thereof and method for cooling electric generator |
| CN108710315B (en) * | 2018-05-22 | 2020-04-07 | 江苏国信靖江发电有限公司 | Method, system, device and storage medium for controlling injection of inhibitor |
| CN109912049A (en) * | 2019-03-15 | 2019-06-21 | 上海莫秋环境技术有限公司 | Metal cooling tower Water Treatment in Circulating Cooling System |
| CN110498460A (en) * | 2019-08-27 | 2019-11-26 | 国网新疆电力有限公司电力科学研究院 | The allotment of Generator Stator Cooling water water quality and protective device |
| CN110498477A (en) * | 2019-08-27 | 2019-11-26 | 国网新疆电力有限公司电力科学研究院 | Generator Stator Cooling water water quality deployment device |
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