What are the requirements of CFB boiler for bed material particles?

Sufficient artificial solid fuel and liquid fuel with suitable solid particle size and good screening distribution. The thickness of the material layer is stable and reasonable, and the feed slag discharge system meets the requirements of bed material balance, ensuring continuous and reliable smooth slag discharge and sufficient feed. The fluidization of materials is not less than the lowest turbulent fluidization degree, the fluidization speed is appropriate, the materials in the furnace are evenly mixed with gas-solid two-phase flow, and the mass transfer process is intense. Adequate air supply, good primary and secondary air distribution, suitable oxygen at the furnace outlet, meeting the requirements of air-coal ratio at any time, and no obvious anoxic zone in the furnace. The bed temperature is moderate, meeting the requirements of general CFB low-temperature combustion temperature of 820 ~ 980 C. Effective recycling process, continuous and stable recycling and fly ash reburning guarantee. Ideal design of wear-resistant refractory layer, excellent construction technology, supply quality and baking technology of unshaped and shaped refractory castable. The steam-water system is perfect, the heating surface layout meets the requirements of heat distribution, adapts to the thermal balance of the material layer, and the bed temperature is stable and reliable.