Improvements in Filtering Apparatus for Steam Boilers.
Year: 1889

page_text: Date of Application, 22nd Oct., 1889
Complete Specification Left, 21st July, 1890-Accepted, 6th Sept., 1890
PROVISIONAL SPECIFICATION.
Improvements in Filtering Apparatus for Steam Boilers.
JOSEPH BROWN 1 Boothen Road, Stoke-on-Trent Staffordshire Engineer do hereby
declare the nature of this invention to be as follows:--
This invention relates to improvements in filtering apparatus made of suitable
material and of any convenient shape and size, to the ends, sides, top or bottom of
which one or more vessels or receptacles containing a suitable filtering medium is
attached, the said apparatus being fixed to the inside of a steam boiler for the purpose
of purifying the water before the same is used for the purpose of raising steam
therefrom.
An injector, feed pump or other suitable appliance is used to force the water
through pipes attached to or passing through the front or other part of the boiler to the
interior of the apparatus, which is surrounded by steam, thus heating the water con-
tained therein, and causing the foreign matters held in solution to be precipitated to
the bottom of the vessel, from whence the sediment or scale can be removed or blown
by the steam, through a pipe or pipes attached to any convenient part of the said
apparatus by opening a valve or cock placed in any suitable position, and by shutting
off the supply of feed water to the apparatus. The water thus deprived of its foreign
matters passes through the receptacles containing the filtering medium into the boiler
proper. By thus filtering the water and depriving same of the foreign matters held in
solution, scale is prevented from forming on the inside surface of a boiler, less fuel is
required to raise steam, a great deal of time is saved, and the life of a boiler is
prolonged.
Datad this 21st day of October 1889
J. NEWTON,
Of the firm of Billington & Newton, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Filtering Apparatus for Steam Boilers.
JOSEPH BROWN, 1 Boothen Road, Stoke-on-Trent, County of Staffordshire, 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 relates to improvements in filtering apparatus constructed of suitable
material, and of any convenient shape and size, within which I place a filtering
medium, such as porous earthenware, cloths or other suitable material or materials, the
said apparatus being fixed to the inside or outside of a steam boiler for the purpose of
purifying the feed water before the same is injected or pumped into a boiler for the
purpose of raising steam therefrom. An injector pump or other suitable appliance is
used to force the water through pipes attached to and passing through the front or other
suitable part of a boiler to the interior of the filtering apparatus, which is in some
cases fixed to and suspended from the top inside of a boiler at any convenient part,
and would be surrounded by the steam raised within the boiler, thus heating the
water contained in and purified by the filtering apparatus, before the said filtered
water passes into the boiler, and causing the foreign matters held in solution to be
precipitated to the bottom of the interior of the said filtering apparatus, from whence
the sediment can be removed or blown from by shutting off the supply of feed water,
and turning on the blow off cock, thus causing a partial vacuum in the filtering
apparatus which causes the steam to pass through holes or apertures formed in the
outer skin of the said filtering apparatus and blow the sediment back through the
SDQ21

page_text: is conducted to the interior of the filtering apparatus and used when necessary as an
auxiliary for blowing out or removing the sediment from the interior of the said
filtering apparatus.
The size and shape of the said filtering apparatus being governed or determined by
the size and shape of the boiler, and the impurity of the water to be filtered.
In order that my invention may be more readily understood and explained in
detail, I have hereunto annexed a sheet of drawings on which letters of reference
are marked on corresponding parts on all the Figs. alike.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a sectional elevation of a steam boiler, shewing my improved filtering
apparatus, fixed or fitted inside the said boiler.
Fig. 2 is a sectional elevation of a steam boiler, shewing the said filtering apparatus
fixed outside on the top of the boiler.
Fig. 3 is a part sectional elevation of a round, square or rectangular filtering
apparatus as shewn at Fig. 1.
Fig. 4 is a part sectional elevation of a round, square or rectangular filtering
apparatus, as shewn at Fig. 2.
In these Figs. a is the boiler within or outside of which my improved filtering
apparatus is fitted or fixed.
The water is forced or injected through pipes c passing through the front plate d of
the boiler a and its interior, into the interior e of the filtering apparatus b, the water
as it passes through the said pipes c becomes heated in its passage, the said interior e
of the filtering apparatus being a perforated round, square, rectangular or other
conveniently shaped metallic casting of suitable thickness, around and outside which
the filtering medium of any suitable thickness is placed and which may consist
of porous earthenware, cloths or other suitable filtering material or materials,
outside and around the said filtering medium f I place a perforated metallic
casting through the perforations in which, the filtered water is gradually
forced by the accumulated water pressure within the interior e into the boiler
as feed water. When necessary to blow out the sediment or deposit from the
interior of the said filtering apparatus b, I shut off the feed water by means of
the valve or cock i, and by so doing cause a partial vacuum within the said
filtering apparatus b which allows the steam from the boiler to enter the interior e
of the apparatus through the perforations and blow out the sediment through
the supply pipe c, cock or valve j into and through the pipe k.
When necessary a valve or cock may be used as an auxiliary to allow steam
to pass from the interior of the boiler a to the interior e of the said filtering
apparatus to blow out the sediment. The perforations being made of any
suitable size, shape and number according to the size and shape of the boiler.
When the said filtering apparatus b is fitted to the outside of a steam boiler, I
provide the said filter shown at Figs. 1 and 3 with an outside metallic casing or
jacket m as shewn at Figs. 2 and 4, leaving a space n all round outside the
perforated metallic casing 9, in the inside lower part of which outside metallic
jacket m the filtered water collects, and passes therefrom into the interior of the
boiler a below the water line through a pipe or pipes o fitted or fixed at each
lower end of the said outer metallic jacket m. A cock or valve p fixed at any
convenient part being used when necessary to allow steam to pass from the
interior of the boiler a into the space n between the outer perforated metallic
casing 9, and the outside metallic casing m. When found requisite to blow out
the sediment or deposit from the interior e of the filtering apparatus b, I shut off
the supply of water to the interior e of the filtering apparatus by means of the
valve and turn on or open the valve or cock 9 which allows steam to pass
through the pipe r to the said interior of the filtering apparatus b and blow

page_text: the sediment through the valve or cock which is fitted or fixed at the back
or other convenient part of the outside jacket or casing m.
Having now particularly described and ascertained the nature of my said inven-
on, and in what manner the same is to be performed, I declare that what I
claim is :-
-
The construction and use of filtering apparatus, which is fitted or fixed within, or
ontside of steain boilers, and to which the water to be filtered is conducted or
conveyed, through a pipe or pipes, through the interior of the boiler, the said filtering
apparatus being constructed and used in the manner and for the purpose as herein
substantially described, set forth, and fully illustrated on the drawings hereunto
annexed.
Dated this 10th day of Inly 1800
JOHN NEWTON,
Agent for Applicant.