针对石化延迟焦化装置加热炉排烟温度高、腐蚀性强、余热回收难题，以山东某石化80万t/a延迟焦化装置加热炉节能改造为例，基于烟气特点研究基础上，提出烟气余热深度利用节能改造方案，采用自主研发防腐高效低阻烟气冷凝热能回收装置并进行工程跟踪检测。研究表明，额定工况下，加热炉排烟温度由200℃降至40℃，节能15.6%；部分负荷工况下，加热炉排烟温度由150~180℃降至40℃，节能13.5%~14.6%，回收冷凝水33.1~46.4 t/d，明显减少了雾气排放，节能、节水、环保、经济效益显著。

The flue gas from the heating furnace in petrochemical delayed coking facility exhibits high temperature,strong corrosion and difficult heat recovery.Taking a heating furnace in an 800,000 tons/year delayed coking facility of a Shandong petrochemical company as an example,this paper puts forward an energy-saving innovation scheme for deep utilization of flue gas heat,based on the study of flue gas characteristics.A flue gas condensation heat recovering facility that exhibits anti-corrosion,high efficient and low resistance is developed independently and used to perform engineering tracking and testing.It is shown that under rated operation conditions,the temperature of flue gas discharged from the heating furnace is reduced from 200℃ to 40℃,saving energy by 15.6%.Under the conditions of partial load,the temperature of flue gas discharged from the heating furnace is lowered from 150-180℃ to 40℃,saving energy by 13.5%-14.6% and recycling 33.1-46.4 t/d of condensate water.This scheme can obviously reduce mist discharge,save energy and water,and will bring about remarkable environmental and economic benefits.

孟繁瑞(1991-),男,硕士生