Method of purifying gases by combustion

摘要

In the complete and safe purification of waste gases which contain organic or inorganic combustible substances by thermal decomposition at temperatures between about 800 DEG C. and 1000 DEG C., wherein the amount of waste gas supplied to an inlet varies in time within wide limits and also the concentration of oxygen and combustible substances varies in such a way that the lower explosion limit is at times exceeded in the waste gas and wherein supplementary fuel is optionally added for the maintenance of the decomposition temperature, the improvement which comprises (A) ADDING TO THE WASTE GAS TO BE DECOMPOSED FRESH AIR OR WASTE GAS WHICH CONTAINS NO COMBUSTIBLE SUBSTANCES IN A CONSTANT AMOUNT WHICH MAINTAINS THE INCOMING FLOW RATE Wo defined in FIG. 3 within the range of 3 and 20% by volume of the maximum amount of waste gas, (B) RENDERING THE FLOW OF THE WASTE GAS MIXTURE LARGELY LAMINAR AND (C) FEEDING THIS LARGELY LAMINAR FLOWING MIXTURE OF WASTE GASES DIRECTLY TO A COMBUSTION CHAMBER, POSSIBLY UNDER DISTRUCTING THE INLET WALL BOUNDARY LAYER AT THE INLET ORIFICE.