沈阳第一机床厂三吨锻造加热炉(图1)的炉底面积2.15 m2,用重油作燃料,用两只自制的束火式油嘴,借 4.5 kg/m2的压缩空气喷油,油温为 90°C。每小时平均耗油130kg,炉温为1250～1350℃,烟气温度为1150℃。该厂为了充分利用烟温热量,在烟道里安装了一个如图2所示的金属套管喷流式换 The furnace bottom area of ​​the three-ton forging furnace (Figure 1) of Shenyang No.1 Machine Tool Plant was 2.15 m2. The heavy fuel oil was used as fuel. Two self-made beam confluence nozzles were used to inject 4.5 kg / m2 of compressed air at an oil temperature of 90 ° C. The average fuel consumption per hour 130kg, furnace temperature of 1250 ~ 1350 ℃, flue gas temperature of 1150 ℃. The plant in order to take full advantage of the smoke temperature and heat, installed in the flue as shown in Figure 2, a metal sleeve jet exchange