高温低氧燃烧技术应用于火筒式油田加热炉的热工特性实验研究

Experimental Study on Thermal Characteristics of High Temperature Air Combustion in a Fire Tube Oil Heating Furnace

将高温低氧燃烧技术(high temperature air combustion,HTAC)应用于火筒式油田加热炉,解决其炉膛换热面受热不均的问题,并对HTAC技术在火筒式油田加热炉上应用相关的热工特性进行了实验研究。结果表明:采用烟气再循环方式可有效实现高温低氧燃烧;且将氧浓度控制在10%~13%范围内较为适宜;采用HTAC技术后,加热炉炉膛内不存在明显的局部高温区,炉膛周向和轴向换热的均匀性均大幅改善;当加热炉负荷降低至额定负荷的60%以下时,炉内轴向换热的均匀性明显恶化;但周向换热的均匀性基本不受影响。

High temperature air combustion(HTAC)was applied to a fire tube oil field heating furnace to solve the problem of the furnace heat exchange surface uneven heating,and the related experimental research on the thermal characteristics of HTAC was carried out.The results show that HTAC can be realized by the flue gas recirculation technology and the suitable oxygen concentration control range is 10%~13%;when the HTAC is adopted,there is no an obvious local high temperature zone in the furnace,and the uniformities of circumferential and axial heat transfer are improved greatly in the furnace;when the heating load is reduced to below 60%of the rated load,the axial uniformity of furnace heat transfer gets worse significantly,but the circumferential uniformity of heat transfer is basically not affected.