The invention discloses an exhaust steam front-loading W
flame boiler with an on-arch secondary air spraying openings and an air
distribution method and relates to a
coal-fired power
plant. The exhaust steam front-loading W
flame boiler with the on-arch secondary air spraying opening and the air
distribution method aim at solving the problems that W
flame boiler
coal dust
airflow fire catching islate, the
burnout is poor and the on-arch and under-arch secondary
air volume distribution is not reasonable, and consequently the classification
combustion level in the boiler is low, the
NOX generation amount in the boiler is high, the
combustion organization manner of the boiler cannot be changed fundamentally, and the above problems cannot be thoroughly solved. The exhaust steam front-loadingW flame boiler further comprises two rows of double-
cyclone-cylinder dense-lean
coal dust combustors, and each double-
cyclone-cylinder dense-lean
coal dust combustor comprises an exhaust steam spraying opening, an on-arch secondary air spraying opening, surrounding air spraying openings and thick
coal dust airflow spraying openings, wherein the thick
coal dust airflow spraying openings are symmetrically formed in the two sides of the on-arch secondary air spraying opening, the exhaust steam spraying opening is formed in the on-arch secondary air spraying opening, the exhaust steam spraying opening is arranged close to the center face of a
hearth, and the exhaust steam spraying opening, the on-arch secondary air spraying opening, the two surrounding air spraying openings and the two thick coal dust airflow spraying openings communicate with the lower
hearth. The exhaust steam front-loading W flame boiler with the on-arch secondary air spraying opening and the air
distribution method belong to the technical field of boiler
combustion.