Improvements in Gas Producers.
Year: 1890

page_text: Improvements in Gas Producers.
We, JAMES JOHN SHEDLOCK and THOMAS DENNY of 105, Gresham House, in the
City of London, Engineers; do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
This invention relates to the construction of a gas producer, as we shall describe
referring to the accompanying drawings. Fig. 1 is a sectional elevation and Fig. 2 a
plan of a gas producer according to our invention.
A strong metal casing W, preferably of cylindrical form, is lined nearly down to its
bottom with refractory material, the lower part Z, which is not so lined, constituting
an ashpit to which access is obtained by opening a tightly closed door Y. At the top
of the casing is a suitable hopper 1 with cover J and valve K for admitting fuel.
Through the upper part of the lining are openings L leading to a conduit M for the
produced gases. The lining is preferably made as shewn with an annular space
between it and the casing forming a series of circular channels F which communicate
with each other and with apertures G leading into the ashpit Z. Instead of forming
these channels in the lining, they may be pipes or conduits formed in or attached to
the casing. In the centre of the ashpit is mounted on a sliding tube S a conical
hearth H. The tube S passes through a stuffing box T, and by means of an
external lever R it and the hearth H may be raised or lowered for the purpose
of breaking up clinker and dropping clinkers and ash into the ashpit. At the
bottom of the tube S there is another stuffing box U through which a pipe V
passes into the interior of the pipe S, and from the top of the pipe S there are
passages X through the conical sides of the hearth. B is an injector worked by.
steam supplied by the pipe A and regulated by the valve C, drawing air through
slots at D regulated by a sliding casing E, and sending a current of mixed air
and steam down the channels F into the ashpit at G. Another larger injector N
with its valves O and P for regulating admission of steam and air supplies the
mixed current directly to the ashpit Z. The producer being charged with fuel
kindled, the air and steam supplied from either or both injectors B and N, or
from these worked alternately finds its way from the ashpit Z up the narrow.
annular space surrounding the hearth H, and through the fuel producing gas
which is led away by the conduit M. Also oil or liquid hydrocarbon may be
introduced by the pipe V to issue from the passages X and mix with the fuel
operated on. At first it is preferred to employ the injector N to send in a large
quantity of air until the fuel becomes incandescent, and then the injector B may
be used to send in a large proportion of steam, which along with the air
accompanying it becomes heated in passing along the channels F before reaching
the ashpit. Afterwards the two injectors may be used alternately, the one to give
abundance of air for the heating up of the fuel, and the other to give mostly
steam to be decomposed by the hot fuel.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is-
1. A gas producer consisting of a casing lined with refractory material and having
in an ashpit space at its bottom a vertically sliding hearth, substantially as and for the

page_text: 2. In combination with a gas producer such as is above referred to a steam and air
injector and channels for heating the steam and air on their way to the ashpit,
substantially as described.
::
ABEL & IMRAY,
Agents for the Applicants.