Directing against the problem of high concentration of NOx emitted from CFB boiler in Guangzhou Petro-chemical Branch Company

it is believed that the main causes are:the high temperature in furnace under condition of fully burning cokes

as well as mutual contradiction in SO2 and NOx control etc..For these

several measures

such as periodically coal-blending for the boilers

controlling the oxygen quantity

and adjusting the load of two boilers etc.

have been put forward.After implementation

NOx emission from CFB boilers has steadily reduced

reaching to below 200 mg/m3

three major indices

namely SO2

NOx

and smoke

all steadily going up to standard.