针对炼厂凝结水低温余热热量品味低、回收难度较大、可再利用途径较少等问题，以凝结水回收系统为对象，研究低温余热梯级深度回收方案。以河北某石化企业为例，采用闪蒸汽优化利用与凝结水同级利用相结合的方案，取得了很好的节能效果，为解决工业低温余热回收难和低温热难以满足工业应用要求等问题及类似工程的节能设计和改造提供参考。

To solve the problems of low temperature residual heat of condensate water,such as low quality of heat,large recovery difficulty and few reuse ways,a gradient deep recovery scheme for low temperature residual heat is studied for condensate water recovery system.A scheme combining the optimal utilization of flash steam and the same grade utilization of condensate water is applied in a petrochemical enterprise in Hebei province,China,which achieves a good energy saving effect.The scheme provides reference for solving the problems of industrial low-temperature residual heat recovery and low temperature heat to meet the requirements of industrial application and energy saving design and transformation for similar projects.