Improvements in Apparatus for Boiling Esparto Grass and other Materials.
Year: 1890

page_text: Cate of Application, 31st Mar., 1890
Complete Specification Left, 7th July, 1890-Accepted, 9th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Boiling Esparto Grass and other
Materials.
I, GEORGE WILLIAM HAWKSLEY of the Brightside Boiler & Engine Works,
Sheffield, in the County of York, Manufacturer, do hereby declare the nature of my
invention to be as follows:-
This invention has for its object to accomplish the boiling process of Esparto grass
and other materials, without thereby reducing the strength of the liquor.
:
For this purpose, I propose to make a cylindrical or other shaped vessel, preferably
approximating thereto, and provided with a manhole at the top, and another near the
bottom, the one being for the introduction of the material to be boiled, the other for
its withdrawal.
I also provide another inlet near the top to admit either water or chemicals either
separately or in combination.
I fix in the vessel and supported upon legs, or preferably upon a convex disc with
perforations or openings for the passage of the liquor, an upright cylinder closed
securely at both ends with perforated tube plates which are fitted with tubes well
secured therein.
A steam pipe from a steam generator of any suitable construction is passed through
the side of the outer vessel and also through the side of the cylinder and by preference
carried up towards the top of same, the end of the pipe being open; an outlet for
condensed steam is carried from the bottom of the eglinder through the outer vessel,
and may be continued as a return pipe to the steam generator, or to an injector for
any required purpose, or otherwise.
The water or liquor in the vessel is intended to reach to within a short distance
from the top of the cylinder, but this is not material; steam is then admitted into the
cylinder which heats the water or liquor in the vertical tubes causing it to rise and
flow out of the tops of said tubes, cooler liquor taking its place, and thus producing
a rapid circulation, and boiling process.
As steam condenses in the cylinder amongst the vertical pipes, it finds its way out
through the outlet before mentioned and runs back into the generator, passes away
through a steam trap, or is otherwise disposed of, but as there is no escape for the
vapour from the boiling liquor, it is retained in the vessel, and the strength of the
liquor is not reduced.
An outlet, or mudhole, may be provided at the lowest point of the vessel,
more porticularly when the vertical cylinder is supported upon a perforated disc
or plate.
ROBT. F. DRURY, Fel. Inst. P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Boiling Esparto Grass and other
Materials.
I, GEORGE WILLIAM HAWKSLEY of the Brightside Boiler & Engine Works
Sheffield in the County of York, Manufacturer, 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 has for its object to accomplish the boiling process of Esparto grass,
and other materials, without thereby reducing the strength of the liquor.

page_text: The annexed sheet of drawings clearly illustrates my invention,
Fig. 1, being plan with the manhole lid removed
Fig. 2, a vertical section of the apparatus.
Similar letters of reference indicate similar parts in either of the two figures.
In carrying out my invention, I construct a cylindrical vessel such as shown in the
drawings, but I do not bind myself to the configuration illustrated.
It is provided with a manhole A at the top, and a second manhole B near the
bottom, the one marked A being for the introduction of the Esparto grass or other
material to be boiled, and the other one marked B, for its withdrawal, and for cleaning
out the vessel. A mud hole, or blow-off M is provided for the space under the disc D.
I also provide another inlet C, placed near the top of the vessel, to admit water or
chemicals either separately or in combination, and the vessel is preferably provided
with legs L.
In the centre of the vessel, and supported either upon legs, or preferably upon or
by a convex disc D provided with perforations F, or openings for the passage of the
liquor, I fix an upright cylinder G closed at both its upper and lower ends with
tube plates H, which are fitted with open-ended tubes T well secured therein.
A steam pipe S from a steam generator of any suitable construction is passed
through the side of the vessel and also through the side of the cylinder G, and carried
up towards the top of same, the end of the pipe being open.
An outlet O for condensed steam, is carried from the bottom of the cylinder
through the side of the vessel, and may be continued as a return pipe to the
steam generator, or to an injector, for any required purpose, or be otherwise
disposed of.
The water or liquor in the vessel is intended to be filled above the top of the
cylinder, but this is not essential; steam is then admitted through the pipe S into
the cylinder G, which heats the water or liquor in the vertical tubes T, and causes it
to raise and flow out to the tops of the said tubes: the cooler liquor takes its place,
and thus a rapid circulation and boiling action takes place.
As steam condenses in the cylinder amongst the vertical tubes T, it finds its way
out through the outlet O before mentioned and runs back into the generator, or it
may pass through a steam trap, or be otherwise disposed of, but as the vapour from
the boiling liquor has no means of escape, it is retained in the vessel, and the strength
of the liquor is not reduced, or in any way weakened, or impaired, except by the
material in the vessel.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
:-
1. An improved apparatus for boiling Esparto grass, and other substances,
constructed substantially as hereinbefore described and illustrated.
2. The combination with a boiling vessel, of an internally placed steam cylinder G,
provided with open ended tubes T, a steam inlet S, and an outlet for condensation 0;
constructed substantially as herein before described and illustrated for the purpose
specified.
Dated the 3rd day of July 1890
ROBT. F. DRURY, Fel. Inst. P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.