o o
MODERN GASWORKS PRACTICE
Düring the rim steam was admitted to the base of one regenerator where it was superheated, afterwards travelling down over the bed of coal and sweeping out the hydrocarbons. Travel of the mixture contimied down through the fuel-bed in the first generator, up through the adj acent generator, thence over the second inclined layer of coal and out through the second regenerator. The process was undoubtedly ingenious, but in practice it was never found possible to carbonize completely the coal, with the result that the generator became clogged with. a pasty semi-carbonized mass.
Ain
Blast and Gas Oatlet
lll'IIO .
'Steam
Ain
Fig. 460.—Arrangement of Kbw’s Plant.
l
Some fifteen years ago Kramers and Aarts introduced the plant shown in Fig. 461. The apparatus consisted of two generators, two regenerators, and a recuperator. The generators were placed side by side, and behind each, 011 a higher level, were the regenerators. The generators were blown in parallel, and the carbon monoxide contained in the blow gases was burned just above the fuel by the admission of secondary air. The hot products then travelled out by way of the regenerators and recuperator. After the blow the surface of the fuel in one generator was covered with a layer of coal, and steam was admitted below the fuel in this generator. The steam was decomposed with the formation of water gas, and the inventors claimed