Improvements in Gas Generators.
Year: 1893

page_text: Date of Application, 23rd Aug., 1893
Complete Specification Left, 23rd May, 1894-Accepted, 7th July, 1894
PROVISIONAL SPECIFICATION.
Improvements in Gas Generators.
HENRY PERCY HOLT of Crossley Bros. Ltd. Openshaw Manchester do hereby
declare the nature of this invention to be as follows :-
:―
This invention relates to improvements in generators for producing gas from
coal coke or other suitable fuels; more especially from bituminous coal for driving
engines or other purposes.
This may be effected, as follows.
The generator has a down draft, the firebars being inclined, are at one side, or
both sides, near the top, fuel being fed by a suitable valve above them & air &
steam below them. The coal is coked on these firebars, before sliding down, into
the generator, and the gas outlet is near the bottom.
The generator is usually a circular vertical casing lined with a heat resisting
substance, such as fire-brick.
A hearth is formed at the bottom having a chamber over it of larger bore, than
the generator lining, and is provided with, a suitable pipe to conduct away the
gas made.
About half way up the bore of the generator a pocket is formed provided with,
an inclined rocking grate sloping towards the bore of the generator.
The top of the generator, and pocket, is closed in by a lined gas tight cover,
provided with a valve to feed fuel onto the inclined grate, on which it is coked, and
then falls down or slides into the bore of the generator.
The grate is provided with rocking apparatus, and the ashes & clinker from
this, fall thro' into an ashpit, in the bottom of the pocket, where doors are provided,
for removing the same.
Air & steam are supplied in proper proportions, below the inclined bars, to coke
the bituminous fuel, which falls in an incandescent state into the vertical bore of
the generator thro' which, the air, and steam pass downwards, and take up
carbon, and hydro-carbons and then pass thro' the gas outlet in a fixed state to be
stored for use.
The air & steam may be supplied under pressure, by a suitable injector, or
other means. Doors are provided in the chamber, at the bottom of the generator,
to remove clinker, and ash, and to light up at starting, for which, coke is preferably
used. Poking holes are also provided at the top of the generator, and below the
inclined grate bars.
Two, or more inclined grates may be used, round the bore of the generator.
The general form of the generator, and the construction of the grate, & other
details, may be varied to suit circumstances, the general feature of the inclined
grate, or grates, with the subsequent downward passage of the gas, thro' the fuel
being retained.
Dated this 22nd day of August 1893.

page_text: COMPLETE SPECIFICATION.
Improvements in Gas Generators.
I, HENRY PERCY HOLT, of Crossley Bros. Ltd., Openshaw, Manchester, 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 apparatus for generating combustible gas from coal,
coke or other carbonaceous fuel, particularly bituminous coal.
Fig. is a half side elevation and half vertical section of a gas generator
according to my invention.
Fig. 2 is a half front elevation and half vertical section on the line XX and
Fig. 3 is a half plan and half sectional plan on the line YY of Fig. 1.
A is an iron casing, preferably cylindrical as shewn, B a refractory lining
between which and the casing A there is a layer C of sand or other loose material
which is a bad conductor of heat. At each side of the casing A, or it might be
only at one side, there is formed a pocket D with an inclined fire grate E
surmounted by a feed shoot F having a cover f and an adjustable slide f¹ for
regulating the supply of fuel. By means of crank arms e on a rock shaft worked
by a handle applied externally, the fire bars which are hinged at e' are from time
to time rocked so that ash and clinker can fall into the pocket D from which they
can be removed through a door d. Through an opening G a mixture of air and
steam is injected; it passes up through the fire grate E and the fuel lying thereon,
then down through the body of fuel within the lining B, generating gas, which
finally escapes round the fuel lying on the hearth H and is conducted by a pipe h
to a gas holder or elsewhere. Doors J are provided for clearing the hearth of
clinkers. On each side of the pocket D there is a channel K by which a portion
of the air and steam mixture passes up to a passage k from which it issues through
a number of small openings directed obliquely downwards on the fuel. L is a cover
which can be removed to give access to a bar for breaking up such clinker as may
be formed. Also in starting the action, a chimney may be put over the opening to
give draught, the fuel being in the first place kindled below.
Having now particularly described and ascertained the nature of this invention
and in what mauner the same is to be performed, I declare that what I
claim is :-
A gas generator having in its upper part an inclined grate on which fuel is fed
and through which mixture of air and steam is blown, in a current directed down
through the fuel in the generator, the gas thus produced being discharged at the
bottom, substantially as described.
Dated this 22nd day of May 1894
ABEL & IMRAY,
Agents for the Applicant.