Open AccessCause analysis and countermeasure of blockage in urea pyrolysis denitration system of coal-fired power plant
Author(s) -
Yongqi Yao,
Sha Gui,
Jiaxian Yang,
Jianbo Wei,
Wen Zhang,
Peipei Li,
Feng Xue,
Jingcheng Su,
Xiuru Liu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/651/2/022058
Subject(s) - pyrolysis , crystallization , urea , ammonia , waste management , countermeasure , coal , raw material , environmental science , chemistry , process engineering , materials science , engineering , organic chemistry , composite material
Due to the safety and convenience storage of raw materials and the maturing technology, the method of urea pyrolysis for ammonia has been widely used in the selective catalytic reduction (SCR) denitration technology of thermal power plants. However, crystallization and blockage phenomennons occured frequently, seriously disrupting the normal operation of SCR denitrification systems. In order to analysis the reasons of crystallization plugging in urea pyrolysis process, This paper collects and analyzes the scaling samples from pyrolysis furnace and spraying ammonia pipe to identify scaling substances, analyzes the reasons of urea crystallization, puts forward the improvement measures so as to guarantee the safety and steady operation of SCR-DeNOx system.