Arrangement for recovering the thermal energy contained in combustion waste gases, in particular furnace waste gases

摘要

The invention relates to an arrangement for recovering the heat contained in furnace waste gases. In this case, a waste gas pipe is brought into contact with the room air to be heated, which is introduced by means of a fan into the interspace between the waste gas pipe and a jacket distanced therefrom. In this case, the feed point of the cold air is situated in front of the end of the waste gas pipe, in order to avoid an excessively strong, abrupt cooling at the end of the waste gas pipe and thus an impairment of the natural access in the waste gas pipe. In order to achieve a favourable heat transfer to the air supply, the latter is firstly led in parallel flow with the waste gases in the interspace, and then in counterflow after reversal. <IMAGE>