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一、热风炉的发展历史早在30年代已有热风炉问世,60年代在我国东北有些煤矿曾试用于井筒防冻,但不久又因这些土造热风炉结构不良,寿命不长而停用.1kg80℃空气的体积比1kg水要大1000倍,而其热容量仅为水的1/4,故空气加热器在高温烟气的灼烧、侵蚀下,很容易渗漏及变形损坏,如遇停电或操作不当而造成热风炉干烧,则损坏更快、更严重,故一般锅炉的吸热介质都采用水,然后再用热水或水蒸汽去加热空气,但是这种使用锅炉再中间转换加热空气的方式,不但系统复杂、投资高,而且运转故障多、不安全.
First, the history of the development of hot blast stoves was already available in the 30s. In the 1960s, some coal mines in northeastern China were tried for antifreeze in well boreholes. However, due to the poor structure of these hot blast stoves, the service life was not long enough to be suspended. 1kg80 The air volume of °C is 1000 times larger than that of 1 kg water, and its heat capacity is only 1/4 of that of water. Therefore, under the burning and erosion of high-temperature flue gas, the air heater can easily leak and deform and be damaged, in case of power outage or Improper operation causes the hot air oven to dry and the damage is quicker and more serious. Therefore, the boiler usually uses water as the heat absorbing medium, and then uses hot water or steam to heat the air, but this boiler is used to convert the heated air. The method is not only complicated in system, high in investment, but also in operation failure and insecurity.