单塔双循环脱硫系统结垢问题研究

doi:10.11930/j.issn.1004-9649.201706032

中国电力 ›› 2018, Vol. 51 ›› Issue (4): 149-154.DOI: 10.11930/j.issn.1004-9649.201706032

单塔双循环脱硫系统结垢问题研究

董锐锋¹, 陈浩军², 王锋涛^1,3, 吴文龙^1,3

1. 国网河南省电力公司电力科学研究院, 河南郑州 450052;
2. 润电能源科学技术有限公司, 河南郑州 450052;
3. 河南恩湃高科集团有限公司, 河南郑州 450052

收稿日期:2017-06-05 修回日期:2017-09-28 出版日期:2018-04-05 发布日期:2018-04-12
作者简介:董锐锋(1987-),男,河南濮阳人,博士,工程师,从事燃煤电厂污染物排放治理的设备与技术相关课题研究,E-mail:drfcom2005@163.com;陈浩军(1986-),男,河南濮阳人,硕士,助理工程师,从事燃煤电厂大气污染物排放治理设备的检测与节能相关课题研究,E-mail:15238629917@163.com。

Research on Scale Problem of Single Tower with Dual Loop Desulfurization System

DONG Ruifeng¹, CHEN Haojun², WANG Fengtao^1,3, WU Wenlong^1,3

1. State Grid Henan Electric Power Research Institute, Zhengzhou 450052, China;
2. Rundian Energy Science and Technology Co., Ltd., Zhengzhou 450052, China;
3. Henan EPRI Hitech Group Co., Ltd., Zhengzhou 450052, China

Received:2017-06-05 Revised:2017-09-28 Online:2018-04-05 Published:2018-04-12

摘要/Abstract

摘要： 单塔双循环高效脱硫技术在超低排放节能改造中多被采用，然而部分采用单塔双循环脱硫系统的燃煤电厂出现集液盘下方最高喷淋层结垢严重的现象，喷淋层也有较多喷嘴与支管发生堵塞。以A、B两电厂为例，通过对现场设备与系统的检查，垢样及堵塞物实验室成分分析，以及脱硫塔流场分布数值模拟，分析认为上述问题与集液盘尺寸、附近流场分布、浆液池容积、浆液pH值控制等因素有关。为解决集液盘下方最高喷淋层结垢严重的问题，应从脱硫系统设计入手，加强运行参数控制。B电厂将集液盘下方最高层喷淋层喷嘴换为双向喷嘴，同时加强了运行过程中的补浆调整及相关参数控制，使问题得以解决。

关键词: 燃煤电厂, 超低排放, 脱硫系统, 单塔双循环, 集液盘, 结垢, 堵塞

Abstract: Single tower with dual loop desulfurization system has been widely used in the retrofit of ultra-low emission. However, severe scale problem has taken place in the top slurry spray layer under the slurry collecting bowl in some coal-fired power plants with some nozzle and branch pipe of slurry spray layer also blocked. In this paper, two coal-fired power plants denoted by A and B are taken as examples. Through the examination of the on-site equipment and system, the analysis on the composition of scale sample in laboratory, and the numerical simulation on the flow field distribution of the desulfurization tower using CFD software, it is concluded that the scale problems are related to the size of slurry collecting bowl, nearby flow distribution, the volume of the slurry tank and pH of the slurry. In order to avoid the scale problem, starting from desulfurization tower design, operation parameters control and equipment maintenance should be enforced strictly. In power plant B, the one-way nozzles of the top slurry spray layer under the slurry collecting bowl had been replaced with two-way nozzles and the operation parameters have been also improved. Eventually, the scale problem of power plant B was solved successfully.

Key words: coal-fired power plants, ultra-low emission, desulfurization system, single tower with dual loop, slurry collecting bowl, scale problem, occlusion

中图分类号:

TM621
X511

董锐锋, 陈浩军, 王锋涛, 吴文龙. 单塔双循环脱硫系统结垢问题研究[J]. 中国电力, 2018, 51(4): 149-154.

DONG Ruifeng, CHEN Haojun, WANG Fengtao, WU Wenlong. Research on Scale Problem of Single Tower with Dual Loop Desulfurization System[J]. Electric Power, 2018, 51(4): 149-154.

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https://www.electricpower.com.cn/CN/Y2018/V51/I4/149

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