Please wait a minute...
Waste Disposal & Sustainable Energy
Waste Disposal & Sustainable Energy  2021, Vol. 3 Issue (3): 219-225    DOI: 10.1007/s42768-021-00073-0
    
Experimental study on the partial preheating combustion characteristic of Yankuang coal sludge
Experimental study on the partial preheating combustion characteristic of Yankuang coal sludge
 全文: PDF 
摘要： Coal sludge is a seriously polluted solid waste, and the rational utilization of its resources has long being an undoubtedly important research topic. This paper mainly studies the coal sludge partial preheating characteristic, combustion characteristic and the process of migration and conversion of nitrogen with preheating combustion technology. The experimental results indicate that most of the elements in the coal sludge are released during preheating, and the ratio of the fuel-N converted to the N2, NH3 and HCN are 75.5%, 6.74% and 0.64%, respectively. Compared with the coal sludge, the BET surface area and cumulative pore area of preheated char are increased. The surface of preheated char is loose and porous with many fine particles, while raw coal is dense with larger particles. Meantime, the quantity of carbon defect structure, the active sites and the reactivity of preheated char are all increased. In the whole process, the NOx emission is about 156 mg/m3 (@6% O2), the ratio of fuel-N converted to NOx was 2.98%, and the combustion efficiency is 96.5%. This experiment results will play a vital role in efficient and clean utilization of coal sludge.
关键词： Coal sludge;  Pre-heating combustion;  Nitrogen migration;  Reactivity    
Abstract: Coal sludge is a seriously polluted solid waste, and the rational utilization of its resources has long being an undoubtedly important research topic. This paper mainly studies the coal sludge partial preheating characteristic, combustion characteristic and the process of migration and conversion of nitrogen with preheating combustion technology. The experimental results indicate that most of the elements in the coal sludge are released during preheating, and the ratio of the fuel-N converted to the N2, NH3 and HCN are 75.5%, 6.74% and 0.64%, respectively. Compared with the coal sludge, the BET surface area and cumulative pore area of preheated char are increased. The surface of preheated char is loose and porous with many fine particles, while raw coal is dense with larger particles. Meantime, the quantity of carbon defect structure, the active sites and the reactivity of preheated char are all increased. In the whole process, the NOx emission is about 156 mg/m3 (@6% O2), the ratio of fuel-N converted to NOx was 2.98%, and the combustion efficiency is 96.5%. This experiment results will play a vital role in efficient and clean utilization of coal sludge.
Key words: Coal sludge    Pre-heating combustion    Nitrogen migration    Reactivity
出版日期: 2021-07-20
服务　　
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章　　
Yi ZhangJianguo ZhuJiahang Zhang

引用本文:

Yi ZhangJianguo ZhuJiahang Zhang. Experimental study on the partial preheating combustion characteristic of Yankuang coal sludge. Waste Disposal & Sustainable Energy, 2021, 3(3): 219-225.

链接本文:

https://www.zjujournals.com/wdse/CN/10.1007/s42768-021-00073-0    或    https://www.zjujournals.com/wdse/CN/Y2021/V3/I3/219

No related articles found!