GB561338A - A process for the manufacture of water gas and like gases - Google Patents

Abstract

561,338. Water gas generation. STEINSCHLAEGER, M. Aug. 11, 1942, No. 11243. [Classes 55 (i) and 55 (ii)] In the intermittent water gas process applied also to the production of synthesis gases, both the gases used in the blow and run periods are preheated, the blow gases by the heat of the gases obtained during a gas-making period, and the run gases by the heat of the gases obtained during the blow, the heat of the gases leaving the reaction zone being stored in a regenerator and/or in the ash bed, and/or in the fuel bed. A part of the gases used in the blow and run are introduced into and removed from the generator at one or more points in the side thereof. Oil (or gas) used for carburetting the water gas is cracked by the sensible heat of the gases leaving the generator, and this oil or gas may be preheated. A regenerator heated by the blow gases may be used for the production of synthesis gas by decomposition of coke oven gas or the like mixed with steam or carbon dioxide. Sulphur-free water gas may be mixed with the decomposed coke oven gas to obtain the required ratio of carbon-monoxide to hydrogen. In all these cases the velocity of gases used in the blowing period is chosen according to the temperature and depth of the reaction zone required, and the point of removal of the gases from the generator according to the heat desired in said gases. In the production of carburetted water gas from coal, during the blow, air is passed by line 8 through the regenerator 3, Fig. 1, and by lines_ 9 and 5 to the generator 1, and superheater 2 is heated by the blow gases by line 10. During the run, Fig. 2, steam at 4a is passed through superheater 2 and by lines 4, 5 to the generator 1, and the gases and steam from the reaction zone 1a carbonize the coal in zone 1b previously heated by the blow gases. The hot gases in line 6 crack oil injected through line 7, and the hot carburetted water gas heats the regenerator 3 which is subsequently used to heat the air during the blow. When using coke, the blow is upwards and a down-run is followed by an up-run during which oil is supplied to the run gases. In the production of synthesis gases from coke, during the blow, air from line 32, Fig. 9, is heated in regenerator 30 and passes by lines 33, 34 to the generator 29, heat from the reaction zone 29a being stored in coke 29b, additional air being supplied at 40. The blow gases with additional gas from line 37 and air from line 36 heat regenerator 31. During the run, Fig. 10, steam or carbon dioxide pass by line 38 into the generator 29 and through the hot coke bed 29b, the gases leaving by lines 34, 34a and passing through the regenerator 30. Regenerator 31 is used for decomposing coke oven gas or liquid or gaseous hydrocarbons supplied by line 31c, and steam or carbon dioxide by line 31d, and the gases leaving the generator are mixed in line 41 with the gases leaving the regenerator by line 31 a; the gas thus obtained is used as a synthesis gas. Synthesis gases may also' be obtained from coal, when, during the run, the gases are mixed with steam or carbon dioxide and decomposed in a regenerator.