Efficient clay suspension calcining system capable of controlling color of product.

Abstract

The present disclosure provides a high-efficiency clay suspension calcination system capable of controlling color of product, relates to the technical field of clay calcination. The present disclosure adopts the concept of controlling the combustion atmosphere by splitting air, and the excess air coefficient of the main combustion chamber is controlled to be less than 1, enabling calcination in a reducing atmosphere and controlling the color of clay product. At the same time, the air is divided to a carbon monoxide elimination chamber, so that the excess air coefficient therein is more than 1.15, so as to eliminating unburnt carbon monoxide, and to reduce fuel consumption. The calcined clay first enters a first-stage heat exchanger to reduce the temperature of calcined clay to below 300°C through indirect heat exchange. The heat transfer oil heated after the first-stage heat exchanger passes through a second-stage heat exchanger and a third-stage heat exchanger for heat recovery. The secondstage heat exchanger raises the temperature of the air entering the main combustion chamber and the carbon monoxide elimination chamber, which improves the fuel combustion efficiency.