Article(id=1222499162646630682, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1222499161174434087, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202302053, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1676908800000, receivedDateStr=2023-02-21, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1769396113310, onlineDateStr=2026-01-26, pubDate=1695571200000, pubDateStr=2023-09-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769396113310, onlineIssueDateStr=2026-01-26, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769396113310, creator=13701087609, updateTime=1769396113310, updator=13701087609, issue=Issue{id=1222499161174434087, tenantId=1146029695717560320, journalId=1210938733613449225, year='2023', volume='52', issue='9', pageStart='1', pageEnd='204', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769396112960, creator=13701087609, updateTime=1769396581892, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1222501128068129514, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1222499161174434087, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1222501128068129515, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1222499161174434087, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=190, endPage=194, ext={EN=ArticleExt(id=1222499164588593444, articleId=1222499162646630682, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Case analysis and discussion on the influence of temperature compensation in online pH measurement, columnId=1211002409397129992, journalTitle=Thermal Power Generation, columnName=Power generation technology forum, runingTitle=null, highlight=null, articleAbstract=

The pH values of boiler feed water, steam, boiler water and other measuring points in a chemical power plant were abnormally low, and the problem could not be effectively solved by adjusting the boiler water dosing process. In order to solve this problem and ensure the safe operation of the unit, this paper discusses and analyzes the influence of water sample temperature on pH electrode, Nernst temperature coefficient slope and solution temperature coefficient (ionic activity), and verifies through experiments that the abnormally low pH measurement value is caused by the large deviation of water sample temperature from 25 ℃, and the pH measurement method cannot provide correct temperature compensation. Strict control of water sample temperature, adoption of computational pH meter or selection of high-precision pH meter with precise non-linear temperature compensation function can effectively solve the problem of abnormally low pH measurement in the water and steam system.

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某电站锅炉给水、蒸汽、炉水等测点的pH值持续异常偏低,且无法通过调整炉水加药工艺得到有效解决。为此,探讨分析了水样温度对pH电极、能斯特温度系数斜率以及溶液温度系数(离子活度)的影响情况,并通过试验验证了pH测量值异常偏低是由于水样温度偏离25 ℃较大,而pH测量手段无法提供正确的温度补偿造成的。提出通过严格控制水样温度、采用计算型pH仪表或选择有精密非线性温度补偿功能的高精度pH表等手段,可有效解决该机组水汽系统pH测量异常偏低的问题。

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田利(1971),女,硕士,研究员,主要研究方向为电厂化学专业及在线化学监督技术,

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田利(1971),女,硕士,研究员,主要研究方向为电厂化学专业及在线化学监督技术,

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田利(1971),女,硕士,研究员,主要研究方向为电厂化学专业及在线化学监督技术,

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基于在线pH测量中温度补偿影响的实例分析与探讨
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田利 1 , 程阳 2 , 王艳芬 3 , 戴鑫 1 , 陈丰 2 , 张龙明 1 , 付清敏 4 , 陈裕忠 5
热力发电 | 发电技术论坛 2023,52(9): 190-194
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热力发电 | 发电技术论坛 2023, 52(9): 190-194
基于在线pH测量中温度补偿影响的实例分析与探讨
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田利1 , 程阳2, 王艳芬3, 戴鑫1, 陈丰2, 张龙明1, 付清敏4, 陈裕忠5
作者信息
  • 1.浙江西热利华智能传感技术有限公司,浙江 嘉兴 314000
  • 2.华能国际电力股份有限公司,北京 100031
  • 3.内蒙古自治区特种设备检验研究院包头分院,内蒙古 包头 014030
  • 4.广东粤电云河发电有限公司,广东 云浮 527300
  • 5.华能海门电厂,广东 汕头 515132
  • 田利(1971),女,硕士,研究员,主要研究方向为电厂化学专业及在线化学监督技术,

Case analysis and discussion on the influence of temperature compensation in online pH measurement
Li TIAN1 , Yang CHENG2, Yanfen WANG3, Xin DAI1, Feng CHEN2, Longming ZHANG1, Qingmin FU4, Yuzhong CHEN5
Affiliations
  • 1.Zhejiang TPRI-LH Intelligent Sensing Technology Co., Ltd., Jiaxing 314000, China
  • 2.Huaneng Power Intl Inc., Beijing 100031, China
  • 3.Baotou Branch of Inner Mongolia Special Equipment Inspection and Research Institute. Baotou 014030, China
  • 4.Guangdong Yuedian Yunhe Power Generation Co., Ltd., YunFu 527300, China
  • 5.Huaneng Haimen Power Plant, Shantou 515132, China
出版时间: 2023-09-25 doi: 10.19666/j.rlfd.202302053
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某电站锅炉给水、蒸汽、炉水等测点的pH值持续异常偏低,且无法通过调整炉水加药工艺得到有效解决。为此,探讨分析了水样温度对pH电极、能斯特温度系数斜率以及溶液温度系数(离子活度)的影响情况,并通过试验验证了pH测量值异常偏低是由于水样温度偏离25 ℃较大,而pH测量手段无法提供正确的温度补偿造成的。提出通过严格控制水样温度、采用计算型pH仪表或选择有精密非线性温度补偿功能的高精度pH表等手段,可有效解决该机组水汽系统pH测量异常偏低的问题。

pH  /  在线测量  /  异常  /  温度补偿

The pH values of boiler feed water, steam, boiler water and other measuring points in a chemical power plant were abnormally low, and the problem could not be effectively solved by adjusting the boiler water dosing process. In order to solve this problem and ensure the safe operation of the unit, this paper discusses and analyzes the influence of water sample temperature on pH electrode, Nernst temperature coefficient slope and solution temperature coefficient (ionic activity), and verifies through experiments that the abnormally low pH measurement value is caused by the large deviation of water sample temperature from 25 ℃, and the pH measurement method cannot provide correct temperature compensation. Strict control of water sample temperature, adoption of computational pH meter or selection of high-precision pH meter with precise non-linear temperature compensation function can effectively solve the problem of abnormally low pH measurement in the water and steam system.

pH  /  online measurement  /  abnormal  /  temperature compensation
田利, 程阳, 王艳芬, 戴鑫, 陈丰, 张龙明, 付清敏, 陈裕忠. 基于在线pH测量中温度补偿影响的实例分析与探讨. 热力发电, 2023 , 52 (9) : 190 -194 . DOI: 10.19666/j.rlfd.202302053
Li TIAN, Yang CHENG, Yanfen WANG, Xin DAI, Feng CHEN, Longming ZHANG, Qingmin FU, Yuzhong CHEN. Case analysis and discussion on the influence of temperature compensation in online pH measurement[J]. Thermal Power Generation, 2023 , 52 (9) : 190 -194 . DOI: 10.19666/j.rlfd.202302053
  • 中国华能集团有限公司总部科技项目(HNKJ21-HF305)
2023年第52卷第9期
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doi: 10.19666/j.rlfd.202302053
  • 接收时间:2023-02-21
  • 首发时间:2026-01-26
  • 出版时间:2023-09-25
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  • 收稿日期:2023-02-21
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Science and Technology Project of China Huaneng Group Co., Ltd.(HNKJ21-HF305)
中国华能集团有限公司总部科技项目(HNKJ21-HF305)
作者信息
    1.浙江西热利华智能传感技术有限公司,浙江 嘉兴 314000
    2.华能国际电力股份有限公司,北京 100031
    3.内蒙古自治区特种设备检验研究院包头分院,内蒙古 包头 014030
    4.广东粤电云河发电有限公司,广东 云浮 527300
    5.华能海门电厂,广东 汕头 515132
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https://castjournals.cast.org.cn/joweb/rlfd/CN/10.19666/j.rlfd.202302053
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2种不同金属材料的力学参数

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Number of
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Number of
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种数
Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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