Application of wind and water hybrid cooling door frame on forging furnace

1 刖 My company's forging furnace, furnace door frame are water-cooled, usually, the average annual replacement of 2 to 3 furnace door frame. In 1996, the door frame of the 1.45m2 forging furnace of key equipment was transformed, and the water cooling was changed into the air-cooled and water-cooled hybrid door frame. After more than 5 years of use, the structural performance was intact, and it is expected to reach a service life of more than 10 years. .

2 Modifications The air-cooled and water-cooled hybrid door frame adopts air-cooling and water cooling as the supplement. The air-cooled system is supplied by a new 4kWG9-26 blower, consisting of two cycles, inside and outside. The cold air of the inner circulation enters the transformation work by cooling the inner ring of the door frame into the bow passage of the high-aluminum brick.

The entry into the flue (see) not only cools the oven door but also cools the door bow. The outer circulation passes through the bypass cooling duct, and the recovered hot air merges into the blast tube and enters the combustion chamber (see). This not only cools the furnace door frame but also allows the waste heat to be fully and effectively utilized. Through the cooling of the inner and outer circulation systems, most of the heat of the furnace door frame has been taken away. The residual heat cooling is completed by the second protection line of the furnace door frame and a water cooling system. The water cooling system supplies water to the furnace door frame without interruption, and the heat absorbed by the cooling water is evaporated by the water vapor, and only needs about 0.01t of water per day.

1 inlet vent 2 - inlet 3 - furnace door frame 4 - steam outlet 5 - comparison of energy consumption before and after renovation of the gas outlet 3 In order to evaluate the effect of the transformation, the indicators are statistically analyzed under the same working conditions before and after the transformation. See Table 1. It can be seen from the table that the water consumption of 0.01t/d indicates that the air-cooling performance of the furnace door frame is very good, and the coal consumption saving rate reaches 8.3%. It is confirmed that the recovered hot air improves the thermal efficiency of the furnace.

4 Benefit Analysis 4.1 Direct Economic Benefits Working 8 hours a day, 200 days per year, then h, equivalent to RMB 6 name, power saving before transformation, saving rate /% 200=20t, equivalent to RMB actual annual energy saving equivalent to RMB 9 4.2 Indirect economy Before the benefit transformation, the water-cooled furnace door frame is replaced at least twice a year. According to the production cost of 1350 yuan per furnace door frame, the annual equipment consumption: after the 2X1 transformation, the service life of the hybrid door frame is 10 years, according to the door frame of each furnace 12,000 yuan. Production cost meter (including the newly equipped 4kWG9-26 blower), the annual equipment consumption is 12000/10=that is, the equipment consumption can be reduced every year. 1 Conclusion The air-cooled and water-cooled hybrid cooling door frame has the advantages of water-cooled door frame and air-cooled door frame. It is an ideal forged furnace door frame structure, which not only has a long service life, but also has a certain energy-saving effect, and at the same time, the production is simple and practical, and it is worth promoting.