焦炉余热综合利用研究进展

煤炭是我国主要化石能源，大力发展煤化工具有重要的战略意义，而煤焦化作为煤化工领域的一种重要技术得到了广泛的应用。目前的煤焦化技术耗能巨大，除高温干馏所需能量和炉体散热外，其余绝大多数能量最终转换成红焦显热、烟道气余热和荒煤气余热等待回收的热量。充分回收焦化厂所产生大量余热是当前煤焦化技术的研究重点。本文简述了以上3种形式热量的回收技术研究进展，指出干熄焦技术发展已日趋成熟，可回收大部分红焦显热；采用煤调湿技术、热管技术等可基本实现烟道气余热的高效回收；而回收荒煤气所带高温余热尚未形成成熟、可靠、规模化的技术方案。青岛科技大学开发的基于洗涤精馏的荒煤气余热回收技术，可彻底去除荒煤气中所夹带的焦粉，实现煤气、重质焦油与高沸点洗油的分离，并产生43.5kg高压蒸汽，是解决集中式热量回收的新思路，指出了荒煤气余热利用的新方向。

Application and research of process of comprehensive utilization of coke oven waste heat

Being a coal-rich country, coal chemical industry is an especially strategic area of interest for China. Coal coking is an important technology and widely used in the field of coal chemical industry. Huge energy is consumed during the coking process, except the energy used for the high-temperature retorting dissipated by the furnace body, most of the input energy is transferred as the surplus heat contained in the red coke, flue gas and crude gas, which can be recovered to enhance the economic and environmental benefit of the coal coking plant.It is the key point of the current coal chemical industry to fully recover the large amount of waste heat generated by the coking plant. Here the technologies for recovering the surplus heat of coking process were reviewed:thanks to the mature CDQ, most of the energy of the red coke can be recovered. The use of coal moisture conditioning technology, heat pipe technology can basically achieve the efficient recovery of flue gas waste heat. The recovery of crude gas with high temperature waste heat does not form a mature, reliable, large-scale process. Qingdao University of Science and Technology has developed the washing distillation technology which can remove the coke powder completely, separate gas, heavy tar and high boiling point wash oil clearly and produce 43.5kg steam during the recovery of the surplus heat contained in the crude gas.This provides a new idea for the comprehensive utilization of surplus heat for coal coking process and pointed out a new way of utilizing the energy of crude gas.