Article(id=1222493247478423693, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1222493244286558340, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202212201, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=1671465600000, revisedDateStr=2022-12-20, acceptedDate=null, acceptedDateStr=null, onlineDate=1769394703025, onlineDateStr=2026-01-26, pubDate=1692892800000, pubDateStr=2023-08-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769394703025, onlineIssueDateStr=2026-01-26, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769394703025, creator=13701087609, updateTime=1769394703025, updator=13701087609, issue=Issue{id=1222493244286558340, tenantId=1146029695717560320, journalId=1210938733613449225, year='2023', volume='52', issue='8', pageStart='1', pageEnd='196', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769394702264, creator=13701087609, updateTime=1769394819736, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1222493737050169898, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1222493244286558340, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1222493737050169899, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1222493244286558340, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=81, endPage=86, ext={EN=ArticleExt(id=1222493248870932632, articleId=1222493247478423693, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Theoretical study on potentiometric analysis applied to oxidation control of wet desulfurization slurry, columnId=1211002405299294959, journalTitle=Thermal Power Generation, columnName=Thermal energy science research, runingTitle=null, highlight=null, articleAbstract=

Oxidation reduction potential (ORP) analysis method has been gradually used in the field of limestone-gypsum wet desulfurization slurry oxidation control, but there is a lack of corresponding theoretical research. In this paper, firstly, the standard electrode potentials of each pair in the slurry oxidation process, Eθ(O2q))/H2O and Eθ(S(Ⅵ)/S(Ⅳ)), were obtained based on density functional theory and acid dissociation equilibrium calculation; and the standard electromotive force of each reaction was calculated. Then, based on the main reaction of slurry oxidation, 2HSO3+O2→2H++2SO42–, the theoretical calculation model of the electromotive force of the reaction system was established by the Nernst equation. It was found that the measured ORP of the electromotive force of the reaction system was quite different from that by theoretical calculation, which meant the Nernst equation was not suitable for the slurry oxidation system. Finally, a good multivariate linear fitting relationship between the measured ORP, pH, ln(c(Ca2+)), ln(c(HSO3)) and ln(c(O2)) was established by the stepwise regression. The results indicated that the process of slurry oxidation was not only related to the single indicator of ORP, but also controlled by pH, calcium ion and dissolved oxygen concentration. When ORP is used as the oxidation control indicator of wet desulfurization slurry, the influence of pH, calcium ion and dissolved oxygen concentration should be taken into account at the same time.

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氧化还原电位(ORP)分析法已逐渐应用于石灰石-石膏湿法脱硫浆液氧化控制领域,但目前缺乏相应的理论研究。首先基于密度泛函理论及酸解离平衡计算得到了浆液氧化过程中各电对标准电极电位Eθ(O2(aq))/H2O及Eθ(S(Ⅵ)/S(Ⅳ)),并获得了各反应的标准电动势;然后,以浆液氧化主反应2HSO3+O2→2H++2SO42–为基础,基于Nernst方程建立反应体系电动势理论计算模型,并通过实验研究发现,反应体系电动势实测值ORP与理论计算值EMF相差较大,表明Nernst方程不适用于浆液氧化体系;最后,通过逐步回归法建立了实测ORP与pH值、ln(c(Ca2+))、ln(c(HSO3))及ln(c(O2))之间良好的多元线性拟合关系,该结果表明浆液氧化进程不仅与ORP有关,同时受pH值、钙离子及溶解氧浓度控制,因此以ORP为湿法脱硫浆液氧化控制指标时,应同时兼顾pH值、钙离子及溶解氧浓度的影响。

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房孝维(1992),男,博士,高级工程师,主要研究方向为大气污染物治理、生物质转化等,

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房孝维(1992),男,博士,高级工程师,主要研究方向为大气污染物治理、生物质转化等,

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房孝维(1992),男,博士,高级工程师,主要研究方向为大气污染物治理、生物质转化等,

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电位分析法用于湿法脱硫浆液氧化控制的理论研究
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房孝维 1 , 何育东 1 , 宦宣州 1 , 李兴华 1 , 陶明 1 , 王泽 2
热力发电 | 热能科学研究 2023,52(8): 81-86
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热力发电 | 热能科学研究 2023, 52(8): 81-86
电位分析法用于湿法脱硫浆液氧化控制的理论研究
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房孝维1 , 何育东1, 宦宣州1, 李兴华1, 陶明1, 王泽2
作者信息
  • 1.西安热工研究院有限公司,陕西 西安 710054
  • 2.中国科学院过程工程研究所,北京 100190
  • 房孝维(1992),男,博士,高级工程师,主要研究方向为大气污染物治理、生物质转化等,

Theoretical study on potentiometric analysis applied to oxidation control of wet desulfurization slurry
Xiaowei FANG1 , Yudong HE1, Xuanzhou HUAN1, Xinghua LI1, Ming TAO1, Ze WANG2
Affiliations
  • 1.Xi'an Thermal Power Research Institute Co., Ltd., Xi'an 710054, China
  • 2.State Key Laboratory of Multi-Phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
出版时间: 2023-08-25 doi: 10.19666/j.rlfd.202212201
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氧化还原电位(ORP)分析法已逐渐应用于石灰石-石膏湿法脱硫浆液氧化控制领域,但目前缺乏相应的理论研究。首先基于密度泛函理论及酸解离平衡计算得到了浆液氧化过程中各电对标准电极电位Eθ(O2(aq))/H2O及Eθ(S(Ⅵ)/S(Ⅳ)),并获得了各反应的标准电动势;然后,以浆液氧化主反应2HSO3+O2→2H++2SO42–为基础,基于Nernst方程建立反应体系电动势理论计算模型,并通过实验研究发现,反应体系电动势实测值ORP与理论计算值EMF相差较大,表明Nernst方程不适用于浆液氧化体系;最后,通过逐步回归法建立了实测ORP与pH值、ln(c(Ca2+))、ln(c(HSO3))及ln(c(O2))之间良好的多元线性拟合关系,该结果表明浆液氧化进程不仅与ORP有关,同时受pH值、钙离子及溶解氧浓度控制,因此以ORP为湿法脱硫浆液氧化控制指标时,应同时兼顾pH值、钙离子及溶解氧浓度的影响。

湿法脱硫  /  浆液氧化控制  /  电位分析法  /  Nernst方程  /  逐步回归

Oxidation reduction potential (ORP) analysis method has been gradually used in the field of limestone-gypsum wet desulfurization slurry oxidation control, but there is a lack of corresponding theoretical research. In this paper, firstly, the standard electrode potentials of each pair in the slurry oxidation process, Eθ(O2q))/H2O and Eθ(S(Ⅵ)/S(Ⅳ)), were obtained based on density functional theory and acid dissociation equilibrium calculation; and the standard electromotive force of each reaction was calculated. Then, based on the main reaction of slurry oxidation, 2HSO3+O2→2H++2SO42–, the theoretical calculation model of the electromotive force of the reaction system was established by the Nernst equation. It was found that the measured ORP of the electromotive force of the reaction system was quite different from that by theoretical calculation, which meant the Nernst equation was not suitable for the slurry oxidation system. Finally, a good multivariate linear fitting relationship between the measured ORP, pH, ln(c(Ca2+)), ln(c(HSO3)) and ln(c(O2)) was established by the stepwise regression. The results indicated that the process of slurry oxidation was not only related to the single indicator of ORP, but also controlled by pH, calcium ion and dissolved oxygen concentration. When ORP is used as the oxidation control indicator of wet desulfurization slurry, the influence of pH, calcium ion and dissolved oxygen concentration should be taken into account at the same time.

wet desulfurization  /  slurry oxidation control  /  potential analysis method  /  Nernst equation  /  stepwise regression
房孝维, 何育东, 宦宣州, 李兴华, 陶明, 王泽. 电位分析法用于湿法脱硫浆液氧化控制的理论研究. 热力发电, 2023 , 52 (8) : 81 -86 . DOI: 10.19666/j.rlfd.202212201
Xiaowei FANG, Yudong HE, Xuanzhou HUAN, Xinghua LI, Ming TAO, Ze WANG. Theoretical study on potentiometric analysis applied to oxidation control of wet desulfurization slurry[J]. Thermal Power Generation, 2023 , 52 (8) : 81 -86 . DOI: 10.19666/j.rlfd.202212201
  • 中国华能集团有限公司总部科技项目(HNKJ21-HF182)
2023年第52卷第8期
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doi: 10.19666/j.rlfd.202212201
  • 首发时间:2026-01-26
  • 出版时间:2023-08-25
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  • 修回日期:2022-12-20
基金
Science and Technology Project of China Huaneng Group Co., Ltd.(HNKJ21-HF182)
中国华能集团有限公司总部科技项目(HNKJ21-HF182)
作者信息
    1.西安热工研究院有限公司,陕西 西安 710054
    2.中国科学院过程工程研究所,北京 100190
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2种不同金属材料的力学参数

Family
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Number of
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种数
Number of
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占总种数比例
Percentage of
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Genus
种数
Number of
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Percentage of total
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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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