Introduction of Current Technologies for Coke Dry Quenching System

by Zhangyin Shi

Publisher - NIPPON STEEL & SUMIKIN ENGINEERING CO.,

Category - General Novel

As the environmental problems like global warming by CO2 and air pollution have become more serious in recent years, Coke Dry Quenching (CDQ) plant has gathered a lot of attention from the world by its high energy-recovering and the characteristic of reducing the environment pollution. Since 1976, NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD. (NSENGI) has constructed the first CDQ plant with 56t/h capacity in Yawata Works of NIPPON STEEL & SUMITOMO METAL CORPORATION, we have not only left a lot of domestic building achievements but also expanded this technology to other countries, especially in China and India. In addition, based on long years constructed CDQ experiments, we have accomplished numerous originally technical changes, let operation be more efficient and stable. Recently, along with growing environment-consciousness, the demand for large-scale coke ovens such as top charging coke ovens owning 7.63m height has been the major trend in new construction. And to cope with this variation tendency, the larger treating capacity of CDQ plant also has been demanded. Under such circumstances, NSENGI developed a large-scale CDQ plant owning 280t/h treating capacity and succeeded in establishing the related technologies. Through this innovation, NSENGI realized a single CDQ system available for a large-scale coke oven to which multiple CDQ plants were needed in conventional practice, contributing to the reduction of the investment cost and running cost to be owed by customers. By the establishment of large-scale CDQ technology, NSENGI has designed multivariant sizes of CDQ, capacity from 56t/h to 280t/h to correspond to the variety of specifications and capacities of coke ovens from different customers. In the future, we will continuously aspire to spread the CDQ technology over the world and make more outstanding contribution in protecting and improving the environment.

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