关键词: 煅烧石油焦, 余热回收, 传热, 余热回收效率, 温度不均匀系数

Abstract: This paper investigated the heat transfer between a new type of heat exchanger and the flowing calcined petroleum coke(CPC). The experimental system of waste heat utilization exchanger was installed in the tank calcined furnace. The effects of various CPC equivalent mass flow rate, heat exchange pipe type and water equivalent mass flow rate on the heat transfer efficiencies were experimentally investigated. The results showed that the waste heat exchanger could effectively use the waste heat generated by CPC with an average reutilization ratio of 78.9%. The CPC could be cooled evenly with a non-uniformity temperature coefficient of 0.0757. As CPC equivalent mass flow rate increased, the heat transfer coefficient of heat exchanger increased, and the utilization ratio of waste heat increased first and then decreased. Compared with light-tube heat exchanger tube, fin-tube heat exchanger had better heat transfer performances, with 7.4% higher waste heat utilization ratio and 32.6% less non-uniformity temperature coefficient. The heat transfer coefficient increased with the increase of water equivalent mass flow rate.

Key words: calcined petroleum coke, waste heat reutilization, heat transfer, utilization ratio of waste heat, non-uniformity coefficient of temperature