1.2Mt/a延迟焦化加热炉改造分析

Retrofit Analysis of 120 Mt/a Delayed Coking Furnace

长岭炼化公司对1.2 Mt/a焦化装置加热炉进行了改造。将炉膛空间内易舔炉管垂直燃烧模式改为附墙燃烧模式。改造后加热炉热负荷由原来的32.55 MW增加到38.3 MW,最大处理量由132 t/h(33×4)增加到160 t/h(40×4),操作弹性为正常值的60%~110%。炉子运行更加平稳,在满负荷情况下,炉出口仍可以控制在500℃,管壁温度、炉膛温度和温差可以控制在指标范围内,余热回收系统效果明显提高。为焦化装置长周期运行提供了有力保障。

the 1.2Mt/a coking unit heating furnace of Changling Refining and Chemical company was reformed.Changed the vertical combustion mode of the easy-burning furnace tube in the furnace space to the wall-burning mode.After the transformation,the heating load of the heating furnace increased from 32.55 MW to 38.3 MW,the maximum throughput increased from 132 t/h(33×4)to 160 t/h(40×4),the operational elasticity was 60%to 110%of the normal value.The furnace runs more smoothly,at full load,the furnace outlet can still be controlled at 500℃.The wall temperature,furnace temperature and temperature difference can be controlled within the index range,and the effect of the waste heat recovery system is obviously improved.It provides a strong guarantee for long-term operation of the coking unit.