METHOD AND DEVICE FOR THE POSTCOMBUSTION OF FUEL MIXTURES, AND MORE PARTICULARLY GAS MIXTURES

摘要

1399374 Treating combustion products; heat exchangers EMW-BETRIEB SCHAUMSTOFF KG EMMERLING & WEYL 31 May 1972 [2 June 1971] 25445/72 Headings FIB and F1L [Also in Division F4] A method for burning products of incomplete combustion comprises supplying the said products to a rotatable heat exchanger 7 with a heat exchanging part 13 consisting of a three dimensional arrangement of five elongate elements which in operation produces microturbulence, so that the products flow through a circumferential portion of the heat exchanging part 13, are then burnt and the burnt mixture flows through a further circumferential part 13 in such a way that at least part of the heat of combustion heats the products to be burnt. Air may be mixed with the products of incomplete combustion via port 14 as they enter the heat exchanger along channel 2 or air may be pre-heated by being passed through a different portion of the heat exchanging part before admixture with the products of incomplete combustion. Supply of these products causes rotation of the heat exchanger, which may also be rotated by a boosting drive from the engine. Combustion within the rotor 7 can be initiated by a sparking or glow plug or a catalyst. The heat exchanging part 13 may comprise threads or wires of a highly refractory metal element or alloy. The rotor may be integrally formed of the material of the heat exchanging part. The housing 1 of the device consists of thin highly refractory sheet metal which is thermally insulated externally. To improve heat transfer the products of incomplete combustion may be passed more than once through the heat exchanging part before being burnt, the burnt products also being passed several times through the heat exchanging part. To prolong reaction time before the burnt products pass through the heat exchanging part, the mixture may pass through a retaining space (41) Fig. 4, (not shown) for example in the form of a spiral shaped passage or an additional chamber. The device also acts as a muffler to reduce exhaust noise.