Coal water slurry low-concentration oxygen enrichment fluidization suspension combustion method and boiler device thereof

The invention relates to a coal water slurry low-concentration oxygen enrichment fluidization suspension combustion method and boiler device. Zeolite molecular sieve oxygen enrichment devices are adopted to manufacture 24 to 30 percent of low-concentration oxygen enrichment air, the air is heated through an air preheater, primary air, secondary air and graining air pass through a fluidized bed, a secondary air opening and a coal water slurry granulator respectively to enter a combustion chamber, fluidization suspension combustion is achieved, the ignition and combustion condition of the coal water slurry boiler is improved, the ignition temperature of fuel is reduced, the combustion temperature, the combustion rate and the combustion-off rate are improved, the ignition and combustion stability of the fuel is improved, the adaption range of the coal water slurry boiler to the coal water slurry fuel is widened, and the boiler can be suitable for combusting coal water slurry made of inferior coal and also suitab