Patent GB-190117494-A (GB)
Title: Improvements relating to the Manufacture of Gas.
Inventor: SCHNIEWIND FREDERIC WILLIAM CH
Filed: 1901-08-31
Granted: 1902-01-23
Abstract: 17,494. Schniewind, F. W. C. Aug. 31. Gas manufacture, processes for.-Refers to the process described in Specification No. 10,588, A.D. 1900. Gas is manufactured by dry distillation, and the poorer portion is treated to extract its illuminants which are then mixed with the richer portion. Gas is also made in a gas-producer, and the water gas obtained mixed with the enriched gas obtained by distillation, thereby increasing the bulk, and diminishing the proportionate amount of sulphur impurities, while the producer gas also obtained is added to the poor gas which has been deprived of its illuminating-constituents. The former mixture is used for lighting, and the latter for heating the retorts. The drawing is a diagrammatic view of the apparatus employed. A bank of coke ovens A is used to produce gas from bituminous coal, being heated by gas conveyed by tubes q<1>. The rich gases first evolved escape by the valves a' to the main B, and are led to washers c, c', coolers c<2>, c<3>, c<4>, a tar scrubber c<5>, an exhauster c<6>, a cooler c<7>, bell washers c<8>, c<9>, purifying- chambers G, G<1>, and a holder I. The poor gases subsequently evolved pass by the valves a<5> and the tube B' to similar vessels C, C', C<2>, C<3>, C', C<5>, C<6>, C<7>, C<8>, C<9>, and thence enter in succession two benzene scrubbers D', D to be deprived of their illuminating ingredients by means of an oil spray passing down over perforated transverse partitions first in D and afterwards in D<1>. The residual gas passes to the holder K. The oil, containing the illuminants, is subjected to distillation in the still D<4>, the operation being assisted by allowing a certain amount of gas to pass into the still through the tube B<9>. The vaporized illuminants pass along the tube F, and mix with the rich gas, preferably before it passes through the exhauster c<6>. The oil runs into a reservoir D<5>, and is pumped through a cooler D<6> back to a reservoir D<2> feeding the scrubber D. The generator L is also put into operation, the producer gas evolved during the blowing period passing off through a tube L<2> and a scrubber M to the holder K, where it mixes with the poor gas. The mixture is carried by tubes Q, Q' to the coke-oven burners. The water gas produced during the steaming period may be led through superheating and carburetting chambers N, N', and then to a scrubber N<2>, or may be led directly to the latter. It then passes through condensers N<3>, N<4> to a relief holder 0, from which it is drawn by an exhauster and forced through a purifier G<2>. Passing through a meter H, it next enters the holder I for illuminating-gas, mixing with the enriched gas obtained by distillation. The purifying-chambers G, G<2> contain oxide boxes for removing sulphuretted hydrogen, and the chamber G<1> contains a complete purifying-plant for removing organic sulphur compounds and carbonic acid. The richer portion of the distillation gases may be added directly to the water gas. and the poorer portion, without abstracting any illuminants it may contain, may be mixed with the producer gas.