在线清焦技术在1.20Mt/a焦化加热炉上的应用

介绍了在线清焦技术在中国石油乌鲁木齐石化公司1.20Mt/a延迟焦化装置加热炉上应用的具体操作过程、操作中所遇到的问题、解决方法以及应用效果。应用在线清焦技术后,炉管表面温度下降80℃以上,燃料气用量减少500m3/h(标准状态),有效延长了加热炉运行时间,为全装置达到三年一修提供了有力保障。影响清焦效果的主要因素有:升降温温差、升降温速率、清焦操作时间、炉管结焦厚度等。恒温时瓦斯用量变化、各炉管表面之间温差、炉管表面与分支出口温差都可作为在线清焦成功与否的判定依据。

OAPPLICATION OF ONLINE DECOKING TECHNOLOGY IN COKING FURNACE OF 1.2 Mt/a UNIT

The application of on-line coke cleaning technology in the furnace of 1.2 million t/a delayed coking device in Urumqi petrochemical company is introduced. The problems and countermeasures during the process and the effect were described. The surface temperature of the furnace tube decreases by more than 80 ℃, and 500 m3/h fuel gas consumption are saved due to the application of the technology. The life time of the furnace is effectively prolonged, meeting the three year overhaul period. The main factors affecting coke cleaning are: difference of high and low temperature of tube， rate of heating and cooling temperature，decoking process time, thickness of coke in furnace tube. The changes of gas consumption at constant temperature, surface temperature difference of each furnace tube, and temperature difference between the furnace tube surface and branch outlet can be used as a success criterion for the process.