催化重整装置低温烟气热能深度回收与品位提升系统优化

System optimization of deep heat recovery and energy-level upgrade of low temperature flue gas from catalytic reforming facility

针对石化行业重整加热炉排烟温度较高、能耗高、烟气余热深度回收难、低温余热难以满足工业应用对温度的要求等问题,以重整加热炉为对象,研究低温余热梯级深度回收与温度提升方案;以山东某石化四合一加热炉为例,采用烟气冷凝热能回收装置与热泵结合的方案,对不同烟温降和工业用热水温度条件下的方案进行了技术经济比较,为解决工业低温余热回收难和低温热难以满足工业要求等问题及类似工程的节能设计和改造提供参考。

The heating furnace for catalytic reforming facility in the petrochemical industry has problems such as higher temperature of flue gas,high energy consumption,difficulty in deep heat recovery from flue gas and low temperature remaining heat not meeting the requirements of industrial applications. This paper studies and develops the cascade deep recovery and temperature lifting schemes of low temperature remaining heat based on the heating furnace. A quadruple heating furnace of a certain petrochemical company in Shandong province is taken as an example to adopt a scheme combining the flue gas condensation heat recovery equipment with heat pump,the technical and economic performances of the scheme are compared under conditions of different flue gas temperature drops and different industrially-used hot water temperatures. This paper aims to provide references for solving the problems such as difficulty in deep heat recovery from flue gas and low temperature remaining heat not meeting the requirements of industrial applications,and also provides references of energy-saving design and renovation for the similar projects.