Improvements in Smoke Consuming Appliances for Steam Boilers.
Year: 1891

page_text: Date of Application, 7th Nov., 1891
Complete Specification Left, 5th Aug., 1892-Accepted, 10th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Smoke Consuming Appliances for Steam Boilers.
I, EDMUND MILNES, of Lumn Mills, Bury, in the County of Lancaster,
Drysalter and Cotton Spinner, do hereby declare the nature of this invention to be
as follows:-
:-
My invention relates to improvements in smoke consuming appliances for steam
boilers and the object of my invention is to consume smoke and economise fuel.
In applying my improvements to a steam boiler with two furnace flues I employ
in each flue preferably a single air pipe of suitable size for conveying heated air to
the furnaces at or near the fire bridges.
I prefer to carry the air pipes froin the front to the back of the boiler below the
latter and then carry the pipes back through the furnace flues to each bridge where
the highly heated air is discharged through an opening or openings near the back
of the furnace so as to meet the smoke from the fire. In order to increase the
volume of hot air I may if required fit an injector into each pipe in any convenient
position so that steam may be admitted as required to cause a flow of hot air
through the pipes.
In some constructions instead of bringing the air pipes back through the furnace
flues it may be more convenient to return them beneath the boiler to the front and
take them under the furnace to the bridge; or in cases where several boilers side by
side are employed I might take the air pipes along the back of the boilers in order
to heat the air.
Dated this 6th day of November 1891.
H. B. BARLOW,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Smoke Consuming Appliances for Steam Boilers.
I, EDMUND MILNES, of Lumn Mills, Bury, the County of Lancaster,
Drysalter and Cotton Spinner, 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:--
My invention relates to improvements in smoke consuming appliances for steam
boilers and the object of my invention is to consume smoke and economise fuel.
In applying my improvements to a steam boiler with two furnace flues I employ
in each flue preferably a single air pipe of suitable size for conveying heated air to
the furnaces at or near the fire bridges.
I prefer to carry the air pipes from the front to the back of the boiler below the
latter through the bottom flue and then carry the pipes back through the furnace
flues to each bridge where the highly heated air is discharged through an opening
or openings near the back of the furnace so as to meet the smoke from the fire.
In order to increase the volume of hot air 1 may if required fit an injector into
each pipe in any convenient position so that steam may be admitted as required to
cause a flow of hot air through the pipes.
And in order that my invention may be fully understood and readily carried into
effect I will describe the accompanying sheet of drawings reference being had to
the figures and letters marked thereon.
Figure 1 is a longitudinal sectional elevation of my improved smoke consuming
appliance as applied to a single steam boiler with two furnace flues and

page_text: Fig. 2 is a transverse vertical section of the same taken on the plane of the
line XY, Fig. 1.
Fig. 3 is a plan partly in section illustrating the application of my improvements
to a range of boilers placed side by side.
Similar letters refer to similar parts throughout the several views.
In Figs. 1 and 2,-a designates the boiler, bb the. two furnace flues, c the fire
bars, dd the bridges, e the bottom flue,f the side flues, and g the back flue.
In carrying my improvements into effect I fix two pipes h h below the boiler a;
each pipe has an inlet for air at the front of the boiler and extends through
the bottom flue e to the back flue g whence it returns through one of the furnace
flues to its bridge d, the end of the pipe h passing through and terminating just in
front of the bridge as shown clearly in Fig. 1. Although the pipe is shown and
described as passing through the bridge d it will be readily understood that this is
not an essential detail as the air may be discharged from the pipe through openings
in the bridge or the pipe may be taken over the bridge or any other convenient
arrangement may be adopted. I prefer to apply to each air pipe h an injector or
steam jet fed with steam through a pipe at the back of the boiler in order to
promote the circulation of hot air through the said pipes h.
C
In operation the hot air discharged through the pipe h in front of or near each
bridge d meets the smoke arising from the fire on the fire bars and has a very
great and perceptible effect in perfecting combustion and so reducing the volume of
smoke escaping to a minimum.
In some constructions instead of bringing the air pipes back through the furnace
flues it may be more convenient to return them beneath the boiler or through the
side flues to the front and take them under the furnace to the bridge d.
Fig. 3 illustrates an arrangement in which a range or series of boilers a are
placed side by side.
In this case instead of taking the air pipes h from the front to the back of the
boiler as in the preceding arrangement prefer to place an air pipe h in the main
back flue j and to lead a branch 2 therefrom back through each furnace flue to
its bridge d in the manner above described. The air pipe h is formed with a series
of flanged sockets to which steam jet pipes or injectors can be connected to
promote the flow of hot air through the branch pipes h².
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. The arrangement use and application of a pipe (or pipes) passing from the
back of the boiler through the furnace flue (or flues) and terminating at or near the
bridge for the purpose of supplying and discharging heated air at a point just in
front of or near the bridge and at the back of the fire grate substantially as herein
set forth.
2. The combined arrangement of parts substantially as and for the purposes
herein described and as illustrated by Figs. 1 and 2.
3. The combined arrangement of parts substantially as and for the purposes
herein described and as illustrated by Fig. 3.
Dated this 4th day of August 1892.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicant.