CN102734785B - Leakage judging method for boiler economizer in power plant - Google Patents
Leakage judging method for boiler economizer in power plant Download PDFInfo
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- CN102734785B CN102734785B CN201210229923.5A CN201210229923A CN102734785B CN 102734785 B CN102734785 B CN 102734785B CN 201210229923 A CN201210229923 A CN 201210229923A CN 102734785 B CN102734785 B CN 102734785B
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Abstract
The invention relates to a leakage judging method for a boiler economizer in a power plant. The method mainly comprises the following steps of: converting acquired data on water supply flow and steam flow of the economizer into flow data per second; and subsequently enlarging micro-leakage quantity by accumulating the data per second so as to detect the leakage at the early stage of the economizer accurately. The leakage judging method has the beneficial effects that the leakage condition of the economizer can be judged accurately, the leakage of the economizer can be judged ahead of time for more than at least 12 hours, and the power plant can take measures in time when the leakage occurs in the economizer, thereby ensuring the stability of production and avoiding accidents. The leakage judging method is particularly applicable to the boiler economizer of the power plant.
Description
Technical field
The present invention relates to a kind of station boiler economizer and reveal determination methods.
Background technology
Due to coal-burning power plant's burning coal, the character of utilizing its caloric value to generate electricity, boiler heating surface leaks blowing out and accounts for the more than 70% of power plant boiler accident, therefore judge in advance heating surface and leak and process in time, for preventing that heating surface from leaking expansion or minimizing causality loss has very large realistic meaning.In the time that station boiler economizer leakage is very large, the feedwater flow that enters boiler can obviously be greater than outflow Boiler Steam flow, near flue-gas temperature leakage point and below can obviously decline, while leaking especially severe, flue has a large amount of bucks and flows out, this time, ratio is easier to find that economizer reveals, but leak case is more serious, may cause the more serious consequences of other influences such as economizer booster.But for the economizer leakage initial stage, leakage rate is below 1t/h time, the deviate of feedwater flow and steam flow is very little, simultaneously again because steam water-level regulates automatically, feedwater flow and steam flow deviate can be changed, therefore the real-time difference of feedwater flow and steam flow can not reflect the feature of economizer leakage, leakage rate hour simultaneously, flue-gas temperature does not have significant change yet, and at present coal-burning power plant does not also have effective technological means just to judge economizer at the economizer initial stage of revealing to reveal.
Summary of the invention
Technical problem to be solved by this invention, reveals for also not having at present effective technological means just to judge economizer at the economizer initial stage of revealing exactly, proposes a kind of station boiler economizer and reveals determination methods.
The present invention solve the technical problem, and the technical scheme of employing is:
Station boiler economizer is revealed determination methods, it is characterized in that, comprises the following steps:
A. by feedwater flow and the steam flow data message of collecting unit Real-time Collection economizer;
B. the feedwater flow collecting and steam flow data information transfer are arrived to data processing unit, be scaled feedwater flow per second and steam flow per second by data processing unit;
C. feedwater flow per second and steam flow per second are added up respectively as interval taking set time unit, ask difference to obtain to steam rates difference should be to steam rates Difference Storage in memory cell to the feedwater flow after cumulative and steam flow;
D. the steam rates deviate of giving real-time to steam rates difference and that previous time series obtains is asked difference, obtains to steam rates deviation increasing value, will feed back to observer by display unit to steam rates deviation increasing value;
E. observer's Real Time Observation is to the variation tendency of steam rates deviate, if difference jumps and continues to increase, judges that economizer reveals, and reveals if difference without significant change, judges economizer.
The technical scheme that the present invention is total, by feedwater flow and steam flow are added up taking every second flow as unit, thereby whether whether small variation, by the cumulative amplification of set time, changed thereby effectively judge accurately total amount, and then judge economizer and reveal.
Concrete, described set time unit is 1 hour.
Concrete, described collecting unit is water ga(u)ge and steam-flow meter.
Concrete, described data processing unit is microprocessor.
Concrete, described memory cell is flash memory.
Concrete, described display unit is liquid crystal display.
Beneficial effect of the present invention is, can accurately judge the leakage situation of economizer, can make economizer leakage judge that time advance is more than at least 12 hours, make power plant occur can handle it in time while leakage at economizer, thereby ensure the stability of producing, avoid the generation of contingency.
Detailed description of the invention
Describe technical scheme of the present invention below in detail:
Station boiler economizer of the present invention is revealed determination methods, technical scheme is: first by feedwater flow and the steam flow data message of collecting unit Real-time Collection economizer, the DCS system that can generally adopt by existing power plant is here carried out flow collection, also can gather flow by other special equipment.Then the feedwater flow collecting and steam flow data information transfer are arrived to data processing unit, be scaled feedwater flow per second and steam flow per second by data processing unit, because the data on flows collecting may not be data on flows per second, therefore need data processing unit to carry out processing, to ensure the steam flow per second of the corresponding current time of feedwater flow per second of current time.Again feedwater flow per second and steam flow per second are added up respectively as interval taking set time unit, here it is mainly ageing for what ensure to detect adding up taking set time unit as interval, unit interval, the too short amplification effect that may cause was inadequate, cannot effectively determine and whether reveal, thereby oversize delay of unit interval finds the time of revealing and lose meaning, ask difference to obtain to steam rates difference should be to steam rates Difference Storage in memory cell to the feedwater flow after cumulative and steam flow.Ask difference with the steam rates deviate that previous time series obtains in real time to steam rates difference, obtain to steam rates deviation increasing value, to adopt modes such as generating chart to feed back to observer by display unit to steam rates deviation increasing value, observer is more easily judged.The finally variation tendency to steam rates deviate by observer's Real Time Observation, if difference jumps and continues to increase, judge that economizer reveals, if difference is without significant change, judge that economizer reveals, difference occurs continuing to increase and represents that the total amount of confluent is greater than the total amount of quantity of steam gradually, and revealing has appearred in surperficial economizer, need to stop boiler operatiopn, economizer is overhauled.
A kind of preferred set time unit is 1 hour, and hour slight change is amplified to enough large needs as unit adds up to meet, the while is conducive to again observer's monitoring.
Concrete, described collecting unit is water ga(u)ge and steam-flow meter.Adopt special water ga(u)ge and steam-flow meter to be used for gathering feedwater flow and steam flow, can make this method not need to depend on current control system of power plant, thereby be convenient to applying of this method, also can improve the data precision of collection simultaneously.
Data processing unit in this method is little to the treating capacity of data, but accuracy is had relatively high expectations, and therefore adopts microprocessor can reduce the cost of scheme, can satisfy the demands again, and microprocessor also has advantages of low in energy consumption simultaneously.
Carry out unloading for the ease of data after treatment, a kind of preferred memory cell is flash memory, and flash memory can be read and be stored by multiple peripheral hardware, can be convenient to data and deliver in time other places and observe and identification.
Concrete, described display unit is liquid crystal display.Liquid crystal display not only has advantages of low in energy consumption, easy to use, and is applicable to multiple environment, in the situation that temperature is higher or lower, all can normally work, and is relatively applicable to the working environment needs of economizer.
Claims (6)
1. station boiler economizer is revealed determination methods, it is characterized in that, comprises the following steps:
A. by feedwater flow and the steam flow data message of collecting unit Real-time Collection economizer;
B. the feedwater flow collecting and steam flow data information transfer are arrived to data processing unit, obtain current feedwater flow per second and steam flow per second by data processing unit processing;
C. feedwater flow per second and steam flow per second are added up respectively as interval taking set time unit, ask difference to obtain to steam rates difference should be to steam rates Difference Storage in memory cell to the feedwater flow after cumulative and steam flow;
D. the steam rates difference of giving real-time to steam rates difference and that previous time series obtains is subtracted each other, and obtains to steam rates deviation increasing value, will feed back to observer by display unit to steam rates deviation increasing value;
E. observer's Real Time Observation is to the variation tendency of steam rates difference, if jump and continue to increase to steam rates difference, judges that economizer reveals, if to steam rates difference without significant change, judge that economizer reveals.
2. station boiler economizer according to claim 1 is revealed determination methods, it is characterized in that, described set time unit is 1 hour.
3. station boiler economizer according to claim 1 and 2 is revealed determination methods, it is characterized in that, described collecting unit is feed meter and steam-flow meter.
4. station boiler economizer according to claim 1 and 2 is revealed determination methods, it is characterized in that, described data processing unit is microprocessor.
5. station boiler economizer according to claim 1 and 2 is revealed determination methods, it is characterized in that, described memory cell is flash memory.
6. station boiler economizer according to claim 1 and 2 is revealed determination methods, it is characterized in that, described display unit is liquid crystal display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210229923.5A CN102734785B (en) | 2012-07-04 | 2012-07-04 | Leakage judging method for boiler economizer in power plant |
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| CN201210229923.5A CN102734785B (en) | 2012-07-04 | 2012-07-04 | Leakage judging method for boiler economizer in power plant |
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| CN102734785A CN102734785A (en) | 2012-10-17 |
| CN102734785B true CN102734785B (en) | 2014-11-26 |
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| CN201210229923.5A Expired - Fee Related CN102734785B (en) | 2012-07-04 | 2012-07-04 | Leakage judging method for boiler economizer in power plant |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953988B (en) * | 2016-05-30 | 2018-09-18 | 中国神华能源股份有限公司 | Boiler and its heating surface inner leakage detection method and device |
| CN106224931B (en) * | 2016-08-10 | 2018-02-23 | 中冶北方（大连）工程技术有限公司 | The determination methods of the built-in waste heat boiler water leakage of sintering machine large flue |
| CN106918033A (en) * | 2017-03-21 | 2017-07-04 | 山东中实易通集团有限公司 | Three impulses leakage of boiler tubes alarm control system and method |
| CN114623990A (en) * | 2020-12-14 | 2022-06-14 | 阿里巴巴集团控股有限公司 | Monitoring and leakage positioning method, equipment, boiler, system and storage medium |
Citations (8)
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| JPS58155327A (en) * | 1982-03-12 | 1983-09-16 | Mitsui Eng & Shipbuild Co Ltd | Discovering method for leaking pipe in exhaust gas economizer |
| JPS58191945A (en) * | 1982-05-07 | 1983-11-09 | Toshiba Corp | Detector for leakage of water |
| JPH05187604A (en) * | 1992-01-14 | 1993-07-27 | Kyushu Electric Power Co Inc | Boiler tube leakage inspection method and device thereof |
| JP2007315623A (en) * | 2006-05-23 | 2007-12-06 | Oshima Shipbuilding Co Ltd | Water leakage detector and boiler |
| CN201548386U (en) * | 2009-10-23 | 2010-08-11 | 长春锅炉仪表程控设备股份有限公司 | On-line monitoring system for leakage of boiler tubes |
| CN101839795A (en) * | 2010-05-10 | 2010-09-22 | 任振伟 | The leak diagnostic systems of pressure-bearing pipe of boiler and method |
| CN201611299U (en) * | 2010-02-05 | 2010-10-20 | 华北电力大学 | Positioning device for leakage points of pressure-carrying tube in power station boiler |
| CN102506408A (en) * | 2011-12-13 | 2012-06-20 | 上海发电设备成套设计研究院 | Control device and method for on-line monitoring of safety risk of four pipelines outside furnace of boiler of power station |
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2012
- 2012-07-04 CN CN201210229923.5A patent/CN102734785B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58155327A (en) * | 1982-03-12 | 1983-09-16 | Mitsui Eng & Shipbuild Co Ltd | Discovering method for leaking pipe in exhaust gas economizer |
| JPS58191945A (en) * | 1982-05-07 | 1983-11-09 | Toshiba Corp | Detector for leakage of water |
| JPH05187604A (en) * | 1992-01-14 | 1993-07-27 | Kyushu Electric Power Co Inc | Boiler tube leakage inspection method and device thereof |
| JP2007315623A (en) * | 2006-05-23 | 2007-12-06 | Oshima Shipbuilding Co Ltd | Water leakage detector and boiler |
| CN201548386U (en) * | 2009-10-23 | 2010-08-11 | 长春锅炉仪表程控设备股份有限公司 | On-line monitoring system for leakage of boiler tubes |
| CN201611299U (en) * | 2010-02-05 | 2010-10-20 | 华北电力大学 | Positioning device for leakage points of pressure-carrying tube in power station boiler |
| CN101839795A (en) * | 2010-05-10 | 2010-09-22 | 任振伟 | The leak diagnostic systems of pressure-bearing pipe of boiler and method |
| CN102506408A (en) * | 2011-12-13 | 2012-06-20 | 上海发电设备成套设计研究院 | Control device and method for on-line monitoring of safety risk of four pipelines outside furnace of boiler of power station |
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| CN102734785A (en) | 2012-10-17 |
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