PROCESS AND APPARATUS FOR THE MANUFACTURE OF GASES BY INCOMPLETE COMBUSTION OF HYDROCARBONS

摘要

1455723 Gas manufacture SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 20 Dec 1973 [14 Feb 1973] 7235/73 Heading C5E Gases are produced with inhibition of soot formation by the incomplete combustion of a gaseous or finely-atomized hydrocarbon 3 in the presence of oxygen or a free oxygen-containing gas 4, e.g. air, in an elongated, substantially void reactor 1 provided with at least one device 2 for the supply thereof and at least one device 5 for the discharge of gaseous reaction product 9 therefrom, the hydrocarbon and oxygen or free oxygen-containing gas entering the reactor as a jet or jets 6 from an opening(s) of the supply device(s) at a velocity such that the initial part of the combustion reaction zone 7 is spaced from the opening(s) by a distance at least ten times the diameter of the opening(s), and the residence time of the gas in the reactor being at least 0À1 seconds. A part of the product gas is drawn to jet 6 by suction as indicated by arrows 8. The gas jet(s) issues from the supply opening(s) with, and the gas flow in the reactor is under conditions of, little or no swirl. Steam can also be passed into the reactor. Apparatus for carrying out the reaction has the or each supply device provided with at least one openended pipe of outlet diameter d, the outlet(s) of the pipe(s) opening in the longitudinal direction of the reactor; the diameter of the reactor being at least ten times the diameter d and the length thereof being at least fifty times diameter d. The pipe may be disposed with its outlet coaxial with the axis of the reactor; or two or more pipes may be arranged symmetrically with respect to the axis of the reactor, the distance between any two pipes being at least ten times diameter d and the distance between the wall of the reactor and the pipe(s) nearest thereto being at least five times diameter d. Two or more discharge devices may be evenly spaced circumferentially of the reactor at a distance from the supply device(s) equal to at least half the length of the reactor.