SCR脱硝系统超低排放运行优化技术研究

doi:10.11930/j.issn.1004-9649.201701050

中国电力 ›› 2018, Vol. 51 ›› Issue (2): 143-148.DOI: 10.11930/j.issn.1004-9649.201701050

SCR脱硝系统超低排放运行优化技术研究

方朝君¹, 卢承政¹, 白晓龙^2,3

1. 西安热工研究院有限公司苏州分公司, 江苏苏州 215153;
2. 华能国际电力股份有限公司, 北京 100031;
3. 华能福州电厂, 福建福州 350200

收稿日期:2017-01-08 修回日期:2017-04-22 出版日期:2018-02-05 发布日期:2018-02-11
作者简介:方朝君(1984—),男,河南唐河人,硕士,高级工程师,从事新能源与电力环保研究,E-mail:fangzjok@163.com;卢承政(1978—),男,福建三明人,硕士,高级工程师,从事燃煤电站锅炉低氮燃烧和烟气脱硝技术的研究与应用,E-mail:luchengzheng@tpri.com;白晓龙(1982—),男,山西榆次人,学士,高级工程师,从事火电厂运行优化管理及污染物减排研究,E-mail:16268661@qq.com。
基金资助:
中国华能集团科技项目（No.HNKJ17-H11）。

Study on Operation Optimization of SCR Denitrification with Ammonia-Injection for Ultra-Low Emission

FANG Zhaojun¹, LU Chengzheng¹, BAI Xiaolong^2,3

1. Xi'an Thermal Power Research Institute Co., Ltd. Suzhou Branch, Suzhou 215153, China;
2. Huaneng Power International, Inc., Beijing 100031, China;
3. Huaneng Fuzhou Power Plant, Fuzhou 350200, China

Received:2017-01-08 Revised:2017-04-22 Online:2018-02-05 Published:2018-02-11
Supported by:
This work is supported by Science and Technology Project of China Huaneng Group (No. HNKJ17-H11).

摘要/Abstract

摘要： 为提高燃煤电厂NO_x超低排放改造后的运行水平，以增加了1层备用催化剂的某台600 MW机组为例，实测了超低排放改造后脱硝反应器出口NO_x浓度分布、脱硝反应器出口与脱硫塔出口NO_x浓度偏差以及逃逸氨浓度。对所存在的问题进行了优化调整和处置，包括喷氨优化调整，疏通堵塞的氨支管喷嘴。该机组通过低氮燃烧改造，进一步降低了脱硝装置入口NO_x浓度，为避免过量喷氨造成后续不良影响，提出应适当降低脱硝效率，即以NO_x达标排放为基准，控制喷氨量。对该机组催化剂活性进行评估，给出了催化剂更换、加装或者再生策略选择的约束性指标。

关键词: 燃煤电厂, 选择性催化还原（SCR）, 超低排放, 氨逃逸, 运行优化

Abstract: A 600 MW coal-fired unit with one more layer of backup catalyst is taken as an example in this paper to measure the NO_x concentration distribution at the SCR reactor outlet, the NO_x concentration deviation between the outlets of the SCR reactor and the FGD tower, and the concentration of ammonia slip, for the purpose of improving the operation quality of the thermal power plant after the ultra-low emission technical transformation. Some problems, such as the ammonia injection optimization and blocked ammonia branch nozzle dredging, are resolved and the corresponding adjustment is applied. The low NO_x burner reformation decreases the NO_x concentration at the SCR inlet. To avoid adverse effects due to excessive ammonia injection, it is suggested that the denitrification efficiency should be lowered accordingly, i.e. to control the ammonia injection to a certain level based on the NO_x emission standard. The catalyst activity of the unit is evaluated, and the constraint indexes of catalyst replacement, installation or regeneration strategy selection are proposed.

Key words: coal-fired power plant, selective catalytic reduction (SCR), ultra low emission, ammonia slip, operation optimization

中图分类号:

X511
TM621

方朝君, 卢承政, 白晓龙. SCR脱硝系统超低排放运行优化技术研究[J]. 中国电力, 2018, 51(2): 143-148.

FANG Zhaojun, LU Chengzheng, BAI Xiaolong. Study on Operation Optimization of SCR Denitrification with Ammonia-Injection for Ultra-Low Emission[J]. Electric Power, 2018, 51(2): 143-148.

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https://www.electricpower.com.cn/CN/Y2018/V51/I2/143

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SCR脱硝系统超低排放运行优化技术研究

Study on Operation Optimization of SCR Denitrification with Ammonia-Injection for Ultra-Low Emission

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SCR脱硝系统超低排放运行优化技术研究

Study on Operation Optimization of SCR Denitrification with Ammonia-Injection for Ultra-Low Emission

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