Improvements in Apparatus for Purifying Water for Steam Boilers.
Year: 1887

page_text: Date of Application, 28th May, 1887
Complete Left, 5th Nov., 1887
Complete Accepted, 6th Dec., 1887
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Purifying Water for Steam
Boilers.
GEORGE WALLIS ALLEN 63 York Chambers 27 Brazennose Street Manchester,
Gentleman, HENRY JOHN ALFRED BOWERS 26 Essex Road Acton, London Engineer
do hereby declare the nature of our invention for IMPROVEMENTS IN APPARATUS FOR
PURIFYING WATER FOR STEAM BOILERS to be as follows:-
In a previous patent 128101885 granted to H. J. A. Bowers, a scumplate is described
for the purpose of collecting the impurities of feedwater in Steam Boilers, which are
thrown to the surface by ebullition, these being eventually conveyed to an external
depositing vessel, or separator. The present invention relates to an addition to the afore-
said scumplate, with a view to its improvement. In some waters fed into Boilers such
as river, or canal water, a very heavy earthy deposit exists which on entering a Boiler
through the feed pipe, does not always rise to the surface of the water level in the
Boiler, as lighter impurities do, but occasionally sinks to the bottom of the Boiler,
thereby at times, evading the means provided for its deposition. The present device
is intended to remedy this, & in combination with the scumplate aforesaid, to convey
the heavier impurities to the separator.
The device is made as follows, for the purpose of collecting the impurities of the
feed water. A sheetiron trough with its sides inclined to each other, preferably, at an
angle of about 60°, one end of which is closed, & having a hole cut in it, through
which the end of feed pipe passes, the other end of trough opening out with a con-
verging mouth on to the scumplate aforesaid, the same might be conveniently attached
to it, or be in juxtaposition thereto. On steam being raised, & the Boiler fed with
water, it will enter the trough through the feed-pipe, & the impurities depositing
themselves in it, be forced along towards the scumplate aforesaid & thence in the
ordinary way to the separator.
008

page_text: COMPLETE SPECIFICATION..
Improvements in Apparatus for Purifying Water for Steam
Boilers.
We,
GEORGE WALLIS ALLEN of 63 York Chambers 27 Brazennose Street Manchester
in the County of Lancaster Gentleman and HENRY JOHN ALFRED BOWERS of 26 Essex
Road Acton London Engineer, do hereby declare the nature of said Invention for
IMPROVEMENTS IN APPARATUS FOR PURIFYING WATER FOR STEAM BOILERS, and in what
manner the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
In the Specification to Letters Patent No. 12810 granted to one of us namely the
said Henry John Alfred Bowers on the 26th October 1885 a scum plate is described
for the purpose of collecting from the water fed into steam boilers the impurities
thrown to the surface by ebullition and conveying these impurities to an external
vessel termed a Separator within which vessel they are deposited.
Our present Invention consists chiefly in the addition of a trough to the above
mentioned scum plate with a view to its improvement the said trough being placed
between the feed pipe and the scum plate.
In some waters fed into boilers such as river water or canal water a very heavy
earthy deposit exists which on entering a boiler through the feed pipe does not always
rise to the surface of the water level in the boiler as lighter impurities do but occasion-
ally sinks to the bottom of the boiler thereby at times evading the apparatus provided
for its deposition as already stated. The present device is intended to remedy this
and in combination with the scum plate to collect and convey the heavier as well as
the lighter impurities to the Separator.
And in order that our Invention may be fully understood and readily carried into
effect we will describe the accompanying Sheet of Drawings reference being had to
the figures and letters marked thereon.
Figure 1 is a perspective view of a steam boiler to which our Invention is applied
part of the shell of the boiler being removed to show the trough and scum plate
Figure 2 is a longitudinal section of the same and Figures 3 and 4 are detailed views
of the trough and scum plate.
The trough a is made of any suitable material such as sheet iron and preferably with
its two sides inclined so as to be V or U shaped in section but it may be of any other
suitable form. The solid end of the trough a has a hole in it into which the end of
the feed pipe b is secured or the feed pipe may enter the trough vertically according
to circumstances; the other end of the trough gradually opens out and is attached to
the scum plate c; or if more convenient the trough may be suitably supported inside
the boiler at or about the water level by independent arms or connections and the
mouth of the trough placed in juxtaposition to the scum plate.
When steam is to be raised and the boiler is fed with water through the feed pipe b
the heavy impurities held in suspension in the water are deposited in the trough a and

page_text: gradually carried toward the scum plate and thence with the lighter impurities
collected in the ordinary way by the scum plate to the Separator d.
It is obvious that the trough a may either be straight as shown or be bent or curved
to meet the feed pipe and instead of being secured rigidly to the feed pipe the trough
may simply be placed in juxta position thereto and more than one trough may be
employed in each boiler if found advantageous or desirable. Again although the
Drawing illustrates our Invention as applied to a Lancashire or two flued boiler it is
obvious that it may be applied to other makes of boilers or steam generators.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed we declare that what we
claim is―
1. In a boiler or other steam generator the construction use and application of a
trough in combination with the feed pipe and a Separator or equivalent substantially
as and for the purposes herein described with reference to the accompanying
Drawings.
2. The combination with the feed pipe of a boiler or other steam generator, of a
trough and a scum plate in communication with a Separator or equivalent substan-
tially as and for the purposes herein described and as illustrated by the Drawings
annexed.