Rotary kiln and kiln heat exchange process What is the difference?

Article source：Rotary kiln and kiln heat exchange process What is the difference?

Kiln Network: rotary kiln and kiln heat exchange process What is the difference? Since the rotary kiln and kiln burning pulverized coal in the kiln is different, so the firing zone and other heat exchange process with also different. Coal burning kiln, is the upper space in the material, continues with pulverized coal combustion radiation convection heat to the material, etc., almost independent of the raw meal reaction occurs, and the shaft is different, it uses the fuel and raw materials are mixed together into a ball into the kiln firing, fuel close contact with the material in the calcining zone is based on the conduction heat transfer was predominant, followed convective heat, radiant heat transfer is again, just with kiln firing In contrast with the heat transfer into the form. Kiln preheating zone with a stream, the convective heat transfer surface of the material mainly clinker cooling zone is the convective heat transfer surface with the main stream. The gas flow in the rotary kiln and also different. Kiln chimney or exhaust ventilation is by machine pumping power from kiln to kiln pumping, the gas flow direction is from the kiln (front) to the kiln (after) flow ratio of oxygen gas firing zone behind high. Kiln is a blast and the lower edge by blast, flow from the bottom up, then fired a low oxygen content. Rotary kiln because the material filling ratio is small, airy space, small resistance, smooth ventilation, coal burning completely, calcined easy to control. In the kiln, the kiln due pellet fill the entire space, resistance, uneven ventilation, ventilation affected the upper part of the kiln exhaust gas oxygen content of less volatile matter can not be routed to fire the kiln, the heat loss and seriously affect fuel and heat, so to ensure good ventilation is to improve the kiln Yan, one of the key quality. Please indicate Henan YuFeng Heavy Machinery