关键词: 尿素水解, 布置方式, 烟气脱硝, 选择性催化还原法（SCR）

Abstract:

Combined with specific project examples, the safety reliability and space adaptability of the public urea hydrolysis technology for flue gas denitrification were compared with that of the unit system urea hydrolysis technology, as well as their arrangements, through the research methods of surveys, case studies and lessons. And compared with the unit system configuration, the main advantages of the public system are embodied in the following aspects: the public system is safer and more reliable because of the mutual standby for the hydrolysis reactor; the main pipeline based on transporting ammonia, reduces the possibility of the blockage of the pipeline; which can adapt to the concentration fluctuation of inlet NOx; the space layout is more flexible and compact; more boilers, more advantages can be taken by the public system. The public layout of urea hydrolysis system is recommended priority for the condition that the loading rate is not high, the concentration of nitrogen oxides fluctuations high and the power plant locates in cold regions.

Key words: urea hydrolysis, layout, flue gas denitrification, selective catalytic reduction（SCR）