This same idea of making the air blast pass up through the fuel, while
in the subsequent operation the steam passes down, is also to be found
in the Loomis plant, and is a distinct advantage, as the fuel is at
its hottest where the blast has entered, and, in order to keep down
the percentage of carbon dioxide, it is important that the fuel
through which the water gas last passes should be as hot as possible,
to insure its reduction to carbon monoxide.
The Flannery apparatus is again but a slight modification of the Lowe
plant, the chief difference being that, as the gas leaves the
generator, the oil is fed into it, and, with the gas, passes through a
D-shaped retort tube, which is arranged round three sides of the top
of the generator; and in this the oil is volatilized, and passes, with
the gas, to the bottom of the superheater, in which the vapors are
converted into permanent gases.
The Van Steenbergh plant, with which I have been experimenting for
some time, stands apart from all other forms of carbureted water gas
plant, in that the upper layer of the fuel itself forms the
superheater, and that no second part of any kind is needed for the
fixation of the hydrocarbons, an arrangement which reduces the
apparatus to the simplest form, and leaves no part which can choke or
get out of order, an advantage which will not be underrated by any one
who has had experience of these plants.
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