GB279059A - Improvements in or relating to the manufacture of mixed water gas and distillation gas from fuels of volatile content - Google Patents

Abstract

279,059. Humphreys & Glasgow, Ltd., (Assignees of Chrisman, C. S.). Oct. 13, 1926, [Convention date]. Producers.-Combustible gas comprising a mixture of distillation gas and carburetted water gas is obtained by blasting the lower part of a fuel bed, making an up-run through the fuel bed. carburetting and fixing other gas by heat stored during the blasting and passing the carburetted gas and the water gas from the up-run through the upper part of the fuel bed to generate coal gas which is mixed with the other combustible gases. Two generators 1, 2 are blasted in parallel, the blast gases traversing the gasification zones 11 only, and passing through superheaters 3, 4 and regenerators and carburettors 5, 6, to which air is supplied to support combustion, before leaving by stack valves 29. A down-run is then made on one generator, say 1, and an uprun on generator 2, and, by suitable adjustment of the valves, the water gas from the generator 1 passes through conduit 17 to the regenerator chamber 25 and carburetting chamber 24 of the carburettor 6 from which the gas and oil vapours pass to and are fixed in superheater 4 before entering by conduit 14 the generator 2 where they mix with the up-run water gas and distil the fuel in the upper part of the generator; the mixed gases pass through conduit 20 to condensing apparatus and storage. 'The steam runs are now reversed and an up-run made in generator 1 while a down-run is made in generator 2, the gases taking a path similar to that described but through the alternative fixers and carburettors. In a modified process, after the parallel blast and during a down-run on generator 1, steam is admitted by pipe 32 to vessel 5 and passes through heater 3 to generator 1 and is used in the gas making, in this case it is necessary to make the next step a parallel blasting before the alternative operation is commenced. Supplementary gas from storage may be admitted through pipe 31<b>. In the apparatus shown in Fig. 4, the generator 2<a> is blasted upwards and and gas passes directly into superheater 4<a> and is burned therein, the hot gases passing through the carburettor 5a to the stack 18<a>. During the run, steam is admitted to the base of the generator, the water gas going through the carbonization zone 3a, gas being simultaneously drawn from storage through pipe 20<a>, carburetted in chamber 5a, fixed in superheater 4a and passed together with the water gas through the carbonization zone to the wash box 8<a> and storage. A down-run is then made, the water gas passing by conduit 13<a> to the wash box and storage. Steam or water may be admitted by pipe 28<a>.