Effects of Air Pollution Control Devices on the Chlorine Emission from 410 t/h Circulating Fluidized Bed Boilers Co-firing Petroleum Coke and Coal
Effects of Air Pollution Control Devices on the Chlorine Emission from 410 t/h Circulating Fluidized Bed Boilers Co-firing Petroleum Coke and Coal
复制标题
空气污染控制装置对410t/h循环流化床混燃石油焦煤锅炉氯气排放的影响
DOI：
10.1021/acs.energyfuels.7b03106
复制
发表时间：
2018
期刊：
影响因子：
5.3
通讯作者：
Zhao Changsui
中科院分区：
文献类型：
--
作者：
Cui Jian;Duan Lunbo;Zhou Linfei;Zhao Changsui
在3台410 t/h循环流化床锅炉上进行了石油焦与煤混烧的现场试验，研究了煤与石油焦混烧时Cl的排放特性。所有锅炉均配备先进的空气污染物控制装置（APCD），以满足超低排放要求，例如选择性非催化还原、静电除尘器（ESP）或织物过滤器（FF）以及湿法烟气脱硫（WFGD）。根据美国环境保护署方法26 A，在ESP或FF的入口和出口以及WFGD的出口处同时对气态Cl进行采样。还对进料燃料、石灰石、底灰、ESP或FF灰、石灰石浆液、冲洗水、废水和石膏进行取样，以确定每个流中的Cl。结果表明，超过86.1%的总氯以气态形式排放到烟气中（例如，HCl和Cl 2）。HCl是锅炉出口烟气中的主要组分，占85.1- 88.0%。电除尘器对总氯离子的去除率为15.6%，生物滤池对总氯离子的去除率为19.0-19.7%。WFGD对总氯离子的去除率在91.2- 96.1%之间。总氯主要进入废水和石膏中，分别占76.16- 80.19%和11.35- 12.76%。约1.4-4.3%的总氯最终排放到大气中。
The emission characteristics of Cl were investigated on the basis of the field experiments at three 410 t/h circulating fluidized bed boilers co-firing petroleum coke and coal. All of the boilers were equipped with advanced air pollutant control devices (APCDs) to meet the ultralow emission requirement, such as selective non-catalytic reduction, electrostatic precipitator (ESP) or fabric filters (FFs), and wet flue gas desulfurization (WFGD). Gaseous Cl was sampled simultaneously at both the inlet and outlet of the ESP or FFs and at the outlet of the WFGDs based on U.S. Environmental Protection Agency Method 26A. Feed fuel, limestone, bottom ash, ESP or FF ash, limestone slurry, flush water, wastewater, and gypsum were also sampled to determine Cl in each stream. Results showed that more than 86.1% of total chlorine was emitted into the flue gas in the gaseous form (e.g., HCl and Cl2). HCl was the dominant species in the flue gas at the outlet of boilers, accounting for 85.1–88.0%. The removal efficiencies of total chloride are 15.6% by ESP and 19.0–19.7% by FFs, respectively. The removal efficiencies of total chloride by WFGDs are in the range of 91.2–96.1%. The majority of total chlorine went into wastewater and gypsum, accounting for 76.16–80.19 and 11.35–12.76%, respectively. About 1.4–4.3% of total Cl was finally emitted into the atmosphere.