当前,我国的绝大部分小型锻造车间,仍以燃煤锻造加热炉来加热锻坯。煤的需要量很大,一个只七、八十人的锻造车间,年用煤可达三百吨以上。同时,燃煤锻造加热炉的燃料利用率都很低,其平均热量利用率一般为5～15%,其他均损失掉。而在热量损失的诸因素中,废气之损耗高达50%左右。因此,如何收集利用废气中余热是一个值得重视的问题,也是锻造车间节能的重要途径之一。应该指出,过去不少工厂、车间对大、中 At present, the vast majority of small forging workshops in our country still use coal-fired forging furnaces to heat the forged blanks. The demand of coal is very large, a forging workshop with only seven or eighty people can annually consume over 300 tons of coal. At the same time, coal-fired forging furnace fuel utilization is very low, the average heat utilization is generally 5 to 15%, the other are lost. In the heat loss of the factors, the loss of exhaust gas up to 50%. Therefore, how to collect and utilize waste heat in exhaust gas is a problem worth paying attention to, and it is also an important way to save energy in forging workshop. It should be noted that in the past a lot of factories, workshops on the large, medium