The non-oxidizing zone is consisted of entry sealed room, waste gas preheating zone, direct heating zone, and furnace nozzle and flue gas exhausting system.
无氧化段由入口密封室，废气预热区，直接加热区，炉喉，废气排放系统组成。
2
After scaling the boiler flue gas temperature will increase, reducing the efficiency of the boiler heating, coal consumption increased.
锅炉结垢后将使排烟温度增高、锅炉供暖效率降低，耗煤量增加。
3
This paper introduces the plan, equipment and effects of utilizing waste heat of flue gases of reheating furnace for second heating of heavy oil to improve the combustion conditions.