The invention relates to a
lime powder suspension calcining
production line and a suspension calcining process thereof. The
production line comprises a crushed limestone storage device, a limestone
powder preparation device, a feeding device, a suspension calcining cooling device, a
fuel supply device, a screening device, a finished product storage device and a
waste gas treatment device. The suspension calcining cooling device comprises five stages of heating hoppers, a
decomposition furnace and three stages of cooling hoppers. The heating hoppers, the
decomposition furnace and the cooling hoppers are communicated through a
cyclone feeding
pipe, a
cyclone return
pipe, a material
pipe and an inverted-U-shaped air pipe on the top of the
decomposition furnace to form an air duct, a draught fan and the
fuel gas supply end of the
fuel supply device are connected through the air duct, suspension calcining is carried out in the decomposition furnace, the temperature of suspension calcining ranges from 850 DEG C to 1,000 DEG C, the calcining time is within 10 seconds, finally, materials are discharged through the material pipe of the cooling hopper at the
tail stage, the materials are screened through the screening device, and then finished
lime powder is obtained. The whole production process is in a closed type, environment friendliness is achieved, the heat
utilization rate of suspension calcining is increased, and therefore production efficiency and
production quality are guaranteed.