| 摘要 |
<p>Foreign solid particle removal from hot gases is effected simultaneously with their cooling in a heat exchanger comprising a layer of free flowing heat storage particles, which are circulated through the heat exchanger coming in contact with the gas stream, which is passed counter currentwise through the layer. At the gas entry end this layer acts as a filter bed for the much smaller foreign particles to be removed. The built-up layer of these is removed by periodical application of gas from a different direction than that of the hot gas resulting in the dust being carried away through special channels. In the prefd. version the dust removal gas stream is generated by the deflection of the main gas stream by two subsidiary gas streams. The heat exchanger thus carries out two processes saving a second appliance. It is used esp. for hot reduction gases used in iron are treatment.</p> |
