Improvements in Steam Separating Apparatus for Water Tube. and other Steam Boilers.
Year: 1895

page_text: Date of Application, 26th June, 1895
Complete Specification Left, 26th Mar., 1896-Accepted, 2nd May, 1896
PROVISIONAL SPECIFICATION.
Improvements in Steam Separating Apparatus for Water Tube.
and other Steam Boilers.
I, JOSEPH WILLIAM REED of Mayfield, Jarrow in the County of Durham,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to steam separators or means for freeing steam of its
entrained water and producing drier steam and is applicable to most types of
steam boilers but especially to water tube generators wherein wet steam is
produced.
My invention comprises several steam separating devices which may be used
separately or in combination one with another.
According to one part of my invention I fix in the boiler in any convenient
manner above water level and extending longitudinally for some distance at either
side of the dome hole a special form of baffle plate. In cross section this is
somewhat of the form of two partial arches springing from about the longitudinal
centre line of the steam space and at the springing one or more, inclined channels
are provided leading towards and connected by one or more pipes to the main down
circulating pipe.
The function of the baffle is to prevent spray being thrown up into the dome and
to assist in separating the water carried off by the steam passing into the dome
watercharged and in action the watercharged steam will be projected. against the
under faces of the baffle and some of the water will run down into the channels and
return to the downtake pipe while the steam deprived thereof will pass up to the
dome.
According to another part of my invention to the upper side of the dome, hole
I attach a vertical tubular extension of suitable height. Surmounting. this at a
certain distance I fix an inverted dish or cup shaped baffle or cover of greater
diameter but less than that of the dome by which the entering steam with its
entrained water will be deflected downwards into the annular space in the dome
surrounding the aforesaid tubular extension. In this space I may fix a flat annular
plate for furthur separating the water which falls upon the shell inside the dome
and is drained away by perforations and conduits to the downtake whilst the drier
eteam rises in the dome.
According to a furthur part of my invention I provide and fix in the dome a flat
vertical partition at one side of the aforesaid tubular extension which may or may
not have oppositely inclined water channels and carries about its upper part an
internally arranged steam pipe provided with slots or apertures on its upper side;
it is closed at one end and opens through said partition at the other into the dome."
At a short distance from the said steam pipe orifice within. the dome. I .fit a
second vertical and parallel partition having an opening at its base and provided on
its inner surface with a number of water channels downwardly inclined in opposed
directions and communicating with end passages leading by orifices and conduits.or
pipes as before to the downtake pipe a flat baffle plate being interposed if necessary.
The main steam pipe from the dome is led away from the outer side of these two
partitions.
By this arrangement the steam with any remaining entrained water rises from

page_text: under the inverted dish and passes upwards and into the internal slotted steam pipe
being in its passage deprived of more water. The steam flowing from this pipe is
projected against the partitions any water falling into the inclined channels and
draining away as described while the steam passes downwards between said
partitions and below the outer one any remaining water being projected
downwards onto the shell and drained away. Then the steam thus thoroughly
deprived of water and dried ascends to the main steam pipe.
The various parts of the above described apparatus are made of convenient size
to pass through the manhole.
Instead of the flat partitions and internal slotted steam pipe arrangement above
referred to I may in some cases construct the two partitions in the form of two
concentric cylinders the inner one being but of slightly larger diameter than the
inverted dish baffle. Near and around the upper part of this I cut a number of
slots or perforations through which the waterladen steam passes and is projected
against the inner wall of the outer cylindrical partition which is furnished with a
number of inclined or zigzag water channels and down passages connected to the
main downtake pipe or I may dispense with the inverted dish cover and arrange the
two cylindrical partitions within the dome concentrically around the hole itself.
Dated this 25th day of June 1895.
A. CRAWHALL CHAPMAN,
3 St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.
Improvements in Steam Separating Apparatus for Water Tube
and other Steam Boilers.
I, JOSEPH WILLIAM REED, of Mayfield, Jarrow. in the County of Durham,
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 steam separating apparatus for water
tube and other steam boilers and I will proceed to fully describe it with reference
to the accompanying drawings iu which
Figures 1 and 2 show longitudinal and transverse sectional views of the improved
apparatus as applied to the upper or steam chamber of a water tube boiler.
Figure 3 shows a front view of part of this apparatus as hereinafter described,
Figure 4 being a plan view inside the dome.
Figures 5 and 6 as well as Figures 7 and 8 show respectively vertical sectional
elevational views and sectional plan views of modifications as hereinafter explained
and in the following description like marks of reference designate like parts.
Referring to the drawings, according to one part of my invention, in the shell 1
and above water level and extending longitudinally for some distance at either side
of the dome 2 I arrange and secure as shown a special form of baffle plate 3. In
cross-section this is somewhat of the form of two partial arches, as shown very
clearly in Figure 2, springing from about the longitudinal centre line of the steam
space and at the springing one or more inclined channels 4 are provided leading
towards and connected by piping 5 to the main down-circulating pipe 6. The
function of the baffle is to prevent spray being thrown up into the dome and to
assist in separating the water carried off by the steam passing into the dome water-
charged and in action the water-charged steam will be projected against the under
faces of the baffle and some of the water will run down into the channels and return
to the down-take while the steam deprived thereof will pass up to the dome.
According to another part of my invention to the upper side of the dome hole
I attach a vertical tubular extension 7. of suitable height. Surmounting this at a

page_text: suitable distance I fix an inverted dish or cup-shaped baffle or cover 8 of greater
diameter by which the entering steam with its entrained water will be deflected
downwards into the annular space in the dome surrounding the aforesaid tubular
extension. In this space I fix a flat annular plate 9 for furthur separating the
water which falls upon the shell inside the dome and is drained away by
perforations 10 and conduits 11 to the down-take as shown in the drawings whilst
the drier steam rises in the dome.
'
According to a furthur part of my invention I provide and fix in the dome at one
side of the aforesaid tubular extension a double walled flat vertical partition forming
a space 12 between the walls 13 and 14 thereof. On the wall 13 (and if desired
also on the wall 14) I arrange a series of water channels 15 downwardly inclined in
opposite directions as shown (see Figure 3) and leading to side-down-spouts 16
which again can communicate via openings 17 in the wall 13 with the perforations 18
of the conduit 19 leading to the main downpipe.
The channels 15 are arranged to overlap each other at the outlets so that each
has a separate discharge as shown.
Towards the upper portion of the wall 14 I arrange an internal steam pipe 20
provided with slots or apertures 21 in its upper side and having a closed end at 22
and towards the base of the wall 13 I provide an opening 23 thus giving communi-
cation between the space 12 and space 24 leading to the steam pipe 25 in the upper
portion of the dome.
By this arrangement the steam with any remaining entrained water rises from
under the inverted dish and passes upwards and into the internal slotted steam pipe
being in its passage thus deprived of more water. The steam flowing from this
pipe is projected against the wall 13 of the partition whereby any remaining water
therein is separated and drained away by the channels 15 to the side-spouts 16 as
above described while the now drier steam passes downwards and under the
wall 13 through orifice 23 where it again rises to the main steam outlet pipe 25
aforesaid.
Referring now to Figures 5, 6, 7 and 8 instead of the flat double-walled partition
and internal steam pipe arrangement above described, I may as shown in Figures 5
and 6 construct the two walls 13 and 14 of the partition in the form of two
concentric cylinders the inner one being of but slightly larger diameter than the
inverted dish baffle and at its base I provide openings P which allow any water
already extracted from the steam to drain through them and thence through
perforations 10 to the conduit pipes 11 as above described but it will be observed
that in this construction the conduit pipes at both sides are utilised to drain off the
water simultaneously both from the inverted baffle device and from the water
channels 15. Near and around the upper part of the inner wall 14 I cut or form a
number of slots or perforations 26 as shown through which the steam passes and is
projected against the inner side of the outer cylindrical partition which is furnished
as above described (with reference to Figures 1, 2, 3 and 4) with a number of
oppositely inclined or zig-zag water channels 15 leading as shown to for example
four down-spouts 27.
The arrangement of these circularly undulating water channels and downspouts
is clearly illustrated in the drawings.
In Figures 7 and 8 the inverted dish baffle and short tubular extension 7 are
dispensed with and two concentric walls 13 and 14 are formed immediately around
the dome hole, this arrangement being rather less complicated than that shown in
Figures 5 and 6 but in other respects similar.
It will be observed that the sections shown in Figures 5 and 7 are taken in each
case through two of the downspouts 27 i.e. on lines x x and y y.
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 of baffle plate 3 resembling the form of partial arches

page_text: springing from inclined water channels communicating with the main down-
circulating pipe substantially as and for the purposes herein set forth.
2. The arrangement within the dome of a tubular extension 7 and inverted dish
baffle device in conjunction with conduit 11 leading to main down-circulating pipe
substantially as and for the purposes herein set forth.
3. The arrangement of flat double-walled partition at one side of the dome
having oppositely inclined water channels leading to lateral side-spouts communi-
cating with the main down-circulating pipe in conjunction with the steam receiving
pipe all arranged disposed or adapted to work substantially as and for the purposes
'herein set forth.
4. The arrangement of steam separating apparatus substantially as herein
described and illustrated with reference to Figures 1, 2, 3 and 4 of the drawings.
5. The arrangement of steam separating apparatus substantially as herein
described and illustrated with reference to Figures 5 and 6 of the drawings.
6. The arrangement of steam separating apparatus substantially as herein
described and illustrated with reference to Figures 7 and 8 of the drawings.
7. The general arrangement or combination of parts constituting the several
improvements in steam separating apparatus substantially as herein set forth.
Dated this 25th day of March 1896.
A. CRAWHALL CHAPMAN,
3 St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.