COKE DRY QUENCHING: A SOLUTION FOR ENVIRONMENTAL CONTROL AND ENERGY SAVING

摘要

Coke Producers are asked today to reduce environmental emissions and main resources' consumptions (mainly water and energy sources). Optimization of energy requirements has already been approached and technology has now reached a good design level. Next challenge is to maximize the recovery of materials and energy, considering a not traditional approach for European market. The sensible heat in coke pushed out of oven chamber is usually lost during traditional coke wet quenching, necessary to reduce the coke temperature for the storage and the following use in steelmaking processes. CDQ technology is a sample on how Paul Wurth reaches the energy saving goal and offers an alternative to traditional quenching. With the adoption of CDQ process, a considerable amount of sensible heat of the coke can be recovered by producing steam, suitable to produce energy by a turbine. The energy produced will decrease the net consumption of coke making process and the overall C O_2 emissions into atmosphere. Coke dry quenching reduces also the water consumptions in comparison with traditional quenching. CDQ technology allows an energy saving of 35-40% of energy consumption of coke oven and at the same time it can minimize C O_2, dusts and sludges' emissions.