| 摘要 |
<p>The invention relates to a blast heating apparatus and to a process for reducing the heat losses for the thermal stations with forced draft, meant to heat the inlet air, particularly the air in excess, said apparatus being mounted to the exhaust gases outlet shaft. The blast-heating apparatus claimed by the invention comprises two metal tubes (1 and 2), arranged concentrically which are mounted on the exhaust gases outlet shaft of the thermal stations, by means of some rubber sleeves (3, 4) and of a collar (5), and the inner tube for the exhaust gases outlet, made by extruding from an aluminium alloy and processed at the ends for providing the attachment, is provided on the whole length with more fins (10) arranged longitudinally inside, and also with more fins (9) arranged longitudinally outside. According to the invention, the process for reducing the losses wherethrough the inlet air is heated before the inlet into the combustion chamber of the plant by means of the roast gases by at least 10°C more than the temperature at the outer end wherefrom the inlet is carried out.</p> |
