焦化能源流高效集成关键技术研发与应用

Research and application of the key technology of efficient integration in coking energy flow

针对焦化能耗高、能效低的产业现状,基于冶金流程工程学理论,研发了一系列焦化余热余能回收关键技术。其中,自主研发的高压高温干熄焦余热回收技术,实现吨焦产540℃、9.81MPa的高品质蒸汽550kg,降低焦炭烧损率0.2%;研发的纳米多层复合结构温度可控的上升管一体化余热回收技术,实现了上升管出口的荒煤气温度由804℃降至552℃,实现吨焦产蒸汽119kg;研发的煤调湿技术降低了配合煤水分4%,降低工序能耗250.8MJ/吨煤;研发的导热油作热载体的能源高效利用技术,实现了脱苯能耗降低30.6%和蒸氨能耗降低21.4%,脱苯效率提高0.15%,过程无废水产生;研发的多塔连续粗苯萃取精制和高效复合萃取剂技术,实现了苯纯度达99.95%,甲苯纯度达99.8%以上,二甲苯流程控制在5℃以内,噻吩纯度达99.0%,还实现了全过程不消耗蒸汽。这些关键共性技术在河钢大型焦炉上的成功实施引领了我国焦化行业向能源利用高效化、资源利用深度化的可持续方向发展。

Considering the status of high energy consumption and low energy efficiency in coking industry, Hesteel Group developed a series of key technologies of coking waste heat recovery based on the theory of metallurgical process engineering. The high temperature and high pressure CDQ waste heat recovery technology produced the high quality steam 550 kg per ton coke, at 540℃ and 9.81 MPa, and the coke burning loss rate decreased by 0.2%. The development of nano multilayer composite structure and temperature controlled of the raiser integration of the waste heat recovery technology reduced the exiting temperature of the coke-oven raw gas from 804℃ to 552℃ and produced 119 kg stream per ton coke. The development of coal moisture control CMC reduced the moisture content of blended coal by 4%, and also reduced the process energy consumption of 250.8 MJ per ton coal. The development of effective compound extractant and energy efficiency technology using heat conducting oil as a heat carrier reduced energy consumption of benzene removal by 30.6% and energy consumption of ammonia evaporation by 21.4%, and increased benzene removal efficiency by 0.15% which was realized without producing waste water. The developed technology of multi tower continuous refining crude benzol produced the benzene with the purity of 99.95%, the toluene with the purity of 99.8%, and the thiophene with purity of 99.0%. There was no steam consumption in the entire process. The successful implementation of the above key generic technologies on the large coke-ovens in over Hesteel is leading the coking industry in China to utilize resources efficiently and the sustain the growth.