| 摘要 |
<p>The invention relates to apparatus for drying and de-oiling of metal swarf by combined direct and indirect heating characterised in that in addition to an indirectly acting main burner and a safety burner extending into the combustion zone of a rotary drum an additional burner, directly heating the combustion zone and supplied by fuel of the main burner, is provided at an inclination of 20-25 DEG to the axis of the drum, in the direction of the swarf delivery flow directly over the safety burner, the ratio of indirect to direct heating amounting to 1-4:1. A photo-electric cell is provided above the additional burner to bring the main and additional burners into action on breaking off of the combustion process. <IMAGE></p> |
