关键词: 加热炉, 陶瓷蓄热式, 空气预热器, 八通挡板, 热效率, 烟气氧含量, 排烟温度

Abstract:

This article introduces the upgrading and renovation of the waste heat recovery system of the No.1 jet fuel hydrogenation unit of SINOPEC Hainan Refining & Chemical Co., Ltd. The renovation plan is as follows: By recalculating the thermal efficiency and load of the heating furnace, the original heat pipe preheater is planned to be optimized into a new ceramic regenerative air preheater. The specific renovation content is as follows: Remove the heat pipe preheater originally installed on the top of the heating furnace, and add four sets of ceramic regenerative air preheater modules on the side ground of the reaction feed heating furnace; Reuse the original induced draft fan as a cold flue gas induced draft fan; Add a blower and smoke and air duct. The results show that after the implementation of the modification, the exhaust gas temperature of the heating furnace can be reduced to below 70 ℃, the thermal efficiency of the heating furnace can be increased to over 95%, the exhaust gas temperature can be flexibly adjusted, and the fuel gas consumption of the heating furnace can be reduced by about 10%. The system has good anti-corrosion performance and is stable and reliable during long-term operation of the unit.

Key words: heating furnace, ceramic regenerative, air preheater, eight way baffle, thermal efficiency, oxygen content in flue gas, exhaust gas temperature