煤粉炉掺烧生活垃圾对灰渣特性的影响研究

doi:10.11949/j.issn.0438-1157.20171440

化工学报 ›› 2018, Vol. 69 ›› Issue (6): 2708-2713.DOI: 10.11949/j.issn.0438-1157.20171440

煤粉炉掺烧生活垃圾对灰渣特性的影响研究

林晓青, 陈志良, 李晓东, 陆胜勇, 严建华

能源清洁利用国家重点实验室, 浙江大学热能工程研究所, 浙江杭州 310027

收稿日期:2017-10-30 修回日期:2018-03-02 出版日期:2018-06-05 发布日期:2018-06-05
通讯作者: 严建华
基金资助:
国家自然科学基金创新研究群体项目（51621005）；国家重点研发计划项目（2017YFC0703100）；国家自然科学基金项目（51706201）。

Study on characterization of ash from co-combustion of coal with municipal solid waste

LIN Xiaoqing, CHEN Zhiliang, LI Xiaodong, LU Shengyong, YAN Jianhua

State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China

Received:2017-10-30 Revised:2018-03-02 Online:2018-06-05 Published:2018-06-05
Supported by:
supported by the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (51621005), the National Key Research and Development Program of China (2017YFC0703100) and the National Natural Science Foundation of China (51706201).

摘要/Abstract

摘要：

利用小试规模煤粉炉，研究掺烧不同比例生活垃圾对燃煤灰渣特性的影响，主要包括飞灰元素组成、飞灰粒径分布、飞灰形貌、灰熔点和结渣特性等影响变化研究。结果表明，随着生活垃圾掺烧比例的增加，灰分中Ca、Fe、Cl和S元素含量增加，Al、Mg、K、Na、Ti和Si含量降低，飞灰球形颗粒分布减少，层状堆积结构增多；灰渣熔融特征温度呈平缓下降趋势，但变化范围小于2%，影响较小；掺烧量为25%时，飞灰表面发现少量褐色大颗粒。总之，生活垃圾掺烧对燃煤灰渣特性影响很小，该结果为实际煤粉炉开展掺烧生活垃圾试验提供了一定理论基础。

关键词: 煤燃烧, 废物处理, 粒度分布, 熔融特性, 结渣特性

Abstract:

Experimental study on the slagging and melting characteristics of ashes generated from coal co-combustion with municipal solid waste (MSW) was carried out in a small-scale pulverized coal furnace. The main elements, particle size distribution and morphology of fly ashes were analyzed. Results show that with rising amount of waste, the ratio of Ca, Fe, Cl, and S in the ash increased, but Mg, K, Al, Na, Ti and Si dropped. The morphology of fly ash was observed by scanning electron microscope, finding that the high ratio of waste enhanced the transfer of particles from spherical to layered structures. The fusion temperature descended little within the range of 2%. A small amount of brown particles were found in fly ashes when the ratio of waste reached to 25%. In conclusion, the co-combustion of MSW has little effect on the characteristics of coal ash. These results provide a theoretical basis for the practical co-combustion of MSW in the pulverized coal fired boilers.

Key words: coal combustion, waste treatment, size distribution, melting characteristics, slagging characteristics

中图分类号:

TK229
X705

林晓青, 陈志良, 李晓东, 陆胜勇, 严建华. 煤粉炉掺烧生活垃圾对灰渣特性的影响研究[J]. 化工学报, 2018, 69(6): 2708-2713.

LIN Xiaoqing, CHEN Zhiliang, LI Xiaodong, LU Shengyong, YAN Jianhua. Study on characterization of ash from co-combustion of coal with municipal solid waste[J]. CIESC Journal, 2018, 69(6): 2708-2713.

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煤粉炉掺烧生活垃圾对灰渣特性的影响研究

Study on characterization of ash from co-combustion of coal with municipal solid waste

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