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火焰炉加热,热效率较低,浪费能源,锻造用火焰加热炉热效率仅3～5%,连续式火焰加热炉热效率15～25%。国外分别为10%、40%,差距很大。火焰炉热平衡计算和实测,炉墙散热占5～8%,燃油不完全燃烧损失2～15%,而烟道排烟热损失达50%以上。烟道是节能的关键,国内外节能工业炉都十分重视烟道余热利用,设置热交换器利用烟气余热,把助燃空气加热到350～500℃提高热效率。但是装置复杂,要配耐热钢热交换器、高温鼓风机、高温烧咀。气堵节能是一种完全不同的节能工艺,简便易行,只需往烟道冲入冷空气使排烟阻力增加,延长高温烟气在炉内停留时间,增加炉膛正压,减少冷风吸入,降低排烟温度,减少排烟带走的热量。排烟道设计时必须有足够的抽力,把燃烧废烟迅速排到炉外,要把炉升温时,所有烧咀全功率工作的大量烟气及时排出炉外,
Flame furnace heating, low thermal efficiency, waste of energy, forging with a flame heating furnace thermal efficiency of only 3 to 5%, continuous flame furnace thermal efficiency of 15 to 25%. Foreign countries were 10%, 40%, a great gap. Calculation and measurement of the heat balance of the flame furnace, furnace wall heat accounting for 5 to 8%, incomplete combustion of fuel loss of 2 to 15%, and flue heat loss of smoke up to 50%. Flue is the key to energy saving, domestic and international energy-saving industrial furnaces attach great importance to the use of flue gas waste heat, set the heat exchanger to use flue gas waste heat, the combustion air heating to 350 ~ 500 ℃ to improve thermal efficiency. But the device is complex, with heat-resistant steel heat exchanger, high temperature blower, high temperature burning Tsui. Energy-saving air-block is a completely different energy-saving process, simple and easy, just flushed into the cold air to make the exhaust resistance increases, prolong the residence time of high temperature flue gas in the furnace to increase the positive pressure of the furnace to reduce the cold air inhalation, Reduce the exhaust gas temperature and reduce the heat that the exhaust gas takes away. Exhaust duct design must have sufficient pumping force, the rapid discharge of the combustion of waste smoke to the furnace, the furnace should be heated, all burn Tsui full power work of a large number of fumes out of the furnace in a timely manner,