Improvements in Steam Boilers.
Year: 1889

page_text: Date of Application, 25th July, 1889
Complete Specification Left, 24th Apr., 1890-Accepted, 24th May, 1890
PROVISIONAL SPECIFICATION.
Improvements in Steam Boilers.
I. JOHN JAMES BARCLAY of 55 Milburn Street, Sunderland, Gas Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention has for its object improvements in steam boilers.
In place of burning coal directly in furnaces as is the present practice I se construct
the boiler that the fuel is in the first place converted into gas and afterwards this gas
is burnt together with air.
I provide two gas producers, they are surrounded by the water in the boiler. They
are fed with fuel at the top and are closed with bell valves. The fuel is supported
upon bars and beneath the bars are perforated pipes through which air is forced by
steam jets. The air together with the steam passing up amidst the ignited fuel
generates gas. The gas is conducted from the upper part of the producer by a
downwardly directed passage into a chamber behind the producer and from thence
through ports into the combustion chamber, where it at once comes in contact with
expanded air and complete combustion takes place. The products of combustion
return from the combustion chamber through the boiler tubes to the uptake and se
pass to the chimney. The air is supplied to the combustion chamber by pipes or
tubular passages at the back of the boiler.
Openings are provided in the gas producers in front in order that the contents may
be stirred when necessary to ensure the descent of the fuel and the uniform generation
of gas.
Water tubes passing through the gas producers serve as stays and also increase the
heating surface. A steam generator is provided in the smoke box to supply steam to
the blower.
Dated this 20th day of July 1809.
COMPLETE SPECIFICATION.
Improvements in Steam Boilers.
I, JOHN JAMES BARCLAY of 55 Milburn Street, Sunderland, Gas Engineer, 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 improvements in steam boilers.
In place of burning coal directly in furnaces as is the present practice I so construct
the boiler that the fuel is in the first place converted into gas and afterwards this gas
is burnt together with air.
I provide two gas producers, they are surrounded by the water in the boiler. They
are fed with fuel at the top and are closed with bell valves. The fuel is supported
upon bars and beneath the bars are perforated pipes through which air is forced by
steam jets. The air together with the steam passing up amidst the ignited fuel
generates gas. The gas is conducted from the upper part of the producer by a
downwardly directed passage into a chamber behind the producer and from thence
through ports into the combustion chamber, where it at once comes in contact with
expanded air and complete combustion takes place. The products of combustion
return from the combustion chamber through the boiler tubes to the uptake and so
pass to the chimney. The air is supplied to the combustion chamber by pipes or
tubular passages at the back of the boiler.
Openings are provided in the gas producers in frout in order that the contents may
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page_text: be stirred when necessary to ensure the descent of the fuel and the uniform generation
of gas.
Water tubes passing through the gas producers serve as stays and also increase the
heating surface. A steam generator is provided in the smoke box to supply steam to
the blower.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.
1
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a front elevation of a pair of boilers constructed in accordance with my
1nvention.
Figure 2 is a transverse vertical section of one of the boilers taken through the gas
producers.
Figure is a back elevation, and
Figure 4 is a longitudinal and vertical section.
is the shell of the boiler bare the gas producers and are valves by which
they are closed at the top. 62 are fire bars at the lower part of the gas producers.
c is a blower forcing air mixed with steam through the perforated pipes c'e' up into
the producer between the bars b². d are downwardly directed passages by which the
gas leaves the producers and is conducted to chambers ee.
At the upper part of each chamber e at el are a series of ports by which the gas
passes into the combustion chamber and between the gas ports are other similar
ports by which air is admitted; these ports are at the upper end of air suction
pipes gg.
are small fire doors giving access to grates in the combustion chamber on which
is ignited fuel which serves to maintain ignition of the gas issuing from the gas
ports. are the boiler tubes by which the products of combustion pass from the
Combustion chamber f to the uptake and so to the chimney L. 63 are openings
bare water tubes passing
provided in the gas producers for stirring their contents.
through the producers and serving to stay them and also to add to the heating surfaces
of the boiler. A trunk leads up from the top of each gas producer and into this the
coal is supplied: it is furnished with a slide which is drawn out to allow the fuel
to fall down on to the bell valve b'. The slide is closed before the valve is
lowered. m is a small boiler seated on the main boiler and serving to supply steam
to the blower c.
From the use of my invention great economy of fuel and saving of labour will
result; it admits also of cheap qualities of coal being employed; the generation of
steam also will be more regular than heretofore.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. A steam boiler having within it a gas producer supplying gas to a combustion
chamber also contained within the boiler as set forth.
2. A steam boiler arranged substantially as described and represented by the
annexed drawings.
001 1....
A 1800
J. J. BARCLAY.