氯元素含量对准东煤中钠、钙迁移特性影响实验研究

doi:10.16085/j.issn.1000-6613.2017.02.018

化工进展 ›› 2017, Vol. 36 ›› Issue (02): 525-529.DOI: 10.16085/j.issn.1000-6613.2017.02.018

氯元素含量对准东煤中钠、钙迁移特性影响实验研究

寇学森^1,2, 金晶^1,2, 刘敦禹^1,2, 钟程鹏^1,2, 王永贞^1,2

1 上海理工大学能源与动力工程学院, 上海 200093;
2 上海理工大学协同创新研究院, 上海 200093

收稿日期:2016-07-19 修回日期:2016-09-30 出版日期:2017-02-05 发布日期:2017-02-05
通讯作者: 金晶,博士生导师。E-mail:alicejin001@163.com。
作者简介:寇学森(1989-),男,硕士研究生。E-mail:sdlykouxuesen@163.com。
基金资助:
国家科技支撑计划项目（2015BAA04B03）。

An experimental investigation about influence of chlorine content on transfer characteristic of sodium and calcium in Zhundong coal

KOU Xuesen^1,2, JIN Jing^1,2, LIU Dunyu^1,2, ZHONG Chengpeng^1,2, WANG Yongzhen^1,2

1 School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
2 Collaborative Innovation Institute, University of Shanghai for Science and Technology, Shanghai 200093, China

Received:2016-07-19 Revised:2016-09-30 Online:2017-02-05 Published:2017-02-05

摘要/Abstract

摘要： 借助电感耦合等离子体原子发射光谱仪、X射线衍射仪及管式炉实验系统，通过钠、钙平衡实验研究氯元素对准东煤中钠、钙迁移规律影响。结果表明：氯元素的含量对准东煤中的钠元素迁移起促进作用，随着聚氯乙烯（PVC）添加量从0增加到0.6%（质量分数），钠的逃逸率从76.6%升高至92.9%，这是由于更多的钠元素与氯元素结合形成氯化钠进入气相中，且逃逸出来的钠元素会与SO₂、SO₃等形成硫酸盐并在管壁温度450~650℃的管壁上沾污，形成沾污初始层；氯元素的含量对准东煤中钙元素迁移规律的影响不大，因为钙盐稳定不易挥发，仅有5%左右的钙挥发进入气相，且最多仅有0.7%的钙被尾部水洗装置吸收，剩余的3%左右的钙会沉积在管壁上，形成结渣层。为解决或减轻准东煤结渣问题提供数据支撑及理论指导。

关键词: 煤, 准东煤, 氯, 钠, 钙, 迁移特性

Abstract: The influence of chlorine content on transfer of sodium and calcium during combustion of Zhundong coal is conducted by the equilibrium experiment with inductively coupled plasma and atomic emission spectrum(ICP-AES),X ray diffraction analysis and horizon tube furnace. Results show that the chlorine content in Zhundong coal can promote the volatilization of sodium. The escape rate of sodium rises from 76.6% to 92.9% when PVC content increases from 0 to 0.6wt.%. More sodium chloride is produced and then transported into gas phase due to the higher concentration of sodium and chlorine,and the sulfate formed by votatile sodium and SO₂/SO₃ sticks on the tube wall between 450℃ and 650℃. Consequecely,the initial contamination layer is formed. Chlorine content in Zhundong coal has little effect on the migration of calcium because calcium salt is stable and difficult to volatilize. Only around 5% of the calcium volatilizes into gas phase and only 0.7% of calcium is absorbed by the water washing system. Around 3% of calcium sticks on the wall to form a slagging layer. This paper provides data support and theoretical guidance in solving or relieving slagging problems during combustion of Zhundong coal.

Key words: coal, Zhundong coal, chlorine, sodium, calcium, transfer characteristic

中图分类号:

TK534

寇学森, 金晶, 刘敦禹, 钟程鹏, 王永贞. 氯元素含量对准东煤中钠、钙迁移特性影响实验研究[J]. 化工进展, 2017, 36(02): 525-529.

KOU Xuesen, JIN Jing, LIU Dunyu, ZHONG Chengpeng, WANG Yongzhen. An experimental investigation about influence of chlorine content on transfer characteristic of sodium and calcium in Zhundong coal[J]. Chemical Industry and Engineering Progree, 2017, 36(02): 525-529.

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氯元素含量对准东煤中钠、钙迁移特性影响实验研究

An experimental investigation about influence of chlorine content on transfer characteristic of sodium and calcium in Zhundong coal

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