There are many affecting factors upon NOx formation in coal-fired boilers

the formation mechanism being comparatively complicated.At the same time

a part of affecting factors are limited by coal quality and operation conditions etc.

it is difficult to find out the regularity of NOx formantion by using normal test.Hence

a 410 t/h tangentially firing boiler is used as the prototype

and related numerical models have been established

and the said models being verified and amended through field test data

making the aim and applicality of said models to be enhanced

thereby

some affecting factors

which haven't condition for test

can be numerically simulated and studied

providing basis for analysing and studying combustion in the furnace and regularity of NOx formation.