FIELD: technological processes.
SUBSTANCE: invention relates to combustion products processing methods and can be used at thermal power plants operating on coal fuels, as well as in construction industry, for example, in production of various construction materials. Method of TPP low-lime cinder wastes processing with high content of unburnt coal particles with subsequent application of TPP ash-slag wastes in production of construction materials and in construction TPP cinder wastes are granulated with binder, in form of lime in amount of 5–10 wt%, or clay in amount of 10–15 wt%, or liquid glass in amount of 3–7 wt% by sodium silicate, or TPP high-lime ash in amount of 10–40 wt%, granules are dried, additionally, before granulation with unburnt coal particles content in TPP cinder wastes of less than 15 wt% cinder mixture is added with ground coal in amount sufficient for enabling of cinder mixture calorific capacity in range of 6.3–7.5 kJ/kg, and before cinder mixture granulation at TPP cinder wastes liquid consistence from hydraulic ash removal system or ash dump said wastes are dehydrated util residual humidity of not more than 30 % with clarified water return to TPP, and unburnt coal particles removal is performed by cinder mixture granules burning at temperature of 850–900oC in fluidized bed boiler with cinder mixture coal particles burning until residual amount of not more than 1 wt% and heat recovery at TPP or in other consumers.
EFFECT: increasing quality of TPP cinder wastes processing and obtained raw material for construction materials, cinder wastes recycling.
1 cl, 1 ex, 1 dwg
