Improvements in Steam Generators, and Apparatus connected therewith.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Steam Generators, and Apparatus connected
therewith.
We, WILLIAM WORBY BEAUMONT, Civil Engineer, of Outer Temple, 222, Strand,
London, and HENRY PERCY HOLT, Civil Engineer, of 22, Chancery Lane, London,
do hereby declare the nature of this invention to be as follows:
Our invention relates to steam generators of the tubular type and consists firstly
in the arrangement of the tubes constituting the main part of the generator, and
their connections and attachments, or of other forms of heating surfaces combined
with tubular surfaces, and secondly, in the method of supporting these tubes or
other forms of water enveloping heating surfaces; of forming the casing lining and
heat storing blocks and flues or passages for the hot products of combustion, and
the arrangement of the feed water heating tubes in the Hues or in the less highly
heated parts of the furnace. Preferably the generator consists of coils grids or
layers of simple or duplex tubes but it may consist of one or of several series of
circular concentric envelopes or of spiral concentric envelopes of elongated section
resembling flat thin tubes with in some cases internal or water introducing tubes
or passages within them these tubes or passages being carried nearly to the
extremity of the coil, grid, layer volute or series of connected volutes or otherwise
formed water and steam chambers tubes or holders forming the generator. This
part of the generator is surrounded by a casing lined with suitably formed fire-clay
or other refractory lining and in some cases a central tube of similar material or
of metal may be employed either as an air admission tube or for fuel admission.
Filling or partly filling the space between the lining of the casing and the central
tube or within the casing and between the heating surfaces of the generator of
either or some of the forins described we place grooved or flat dises or plates of
refractory material the discs or plates may be alternately larger and smaller than
the inside of the casing or outside of the tube or they may be of the same diameter
with notches formed in the edges to permit the passage of the hot gases amongst
the heating surface and they may be wedge shaped alternately towards the centre
and from the centre or they may be grooved radially or in spiral forms. These
discs, plates, blocks and heai storing masses may act as distance pieces between
the coils, layers of tubes or grids, and they form supports to the generator parts
and at the same time form the channels by which the gases are caused to impinge
against the heating surfaces.
Dated this 10th day of June 1897
W. WORBY BEAUMONT.
HENRY P. HOLT.

page_text: Improvements in Steam Generators, and Apparatus connected
therewith.
We, WILLIAM WORDY BEAUMONT, of The Outer Temple, 222, Strand, London,
Consulting Engineer, and HENRY PERCY HOLT, of 22. Chancery Lane, Civil
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:-
Our invention relates to steam generators chiefly of the type described in the
Specification of the Patent granted to us No. 5505 of 1897 and consists in the
arrangement of the tubular or other heating surfaces or water and steam enclosing
envelopes and their connections and attachments and also in the methods of sup-
porting these tubes or envelopes by, and the formation of, the generator casing
lining and heat storing blocks forming flues or passages for the products of combus-
tion. Preferably the generator consists of coils or grids of duplex tubes, one end
of the outer tube of each coil being closed and the other ends of the outer and of
the inner tubes forming the duplex tube of each coil fixed in steam and water
connecting pieces hereafter described. This part of the generator according to
our invention is inclosed within a casing lined with refractory material such as
fire clay lumps & bricks are made of built up in segments in various ways.
According to one modification of this part of our invention the refractory lining
built up in four or more segments forms, a cylinder which encloses refractory
tube-separating blocks with radial and other flue spaces alternately towards
the centre of the generator and towards the casing thus giving to the products of
combustion a zig-zag and circuitous course which causes them to impinge upon
the tube surfaces.
In the centre of the generator according to one form of our invention is a central
air or fuel admission tube supported from its upper end by the generator casing
and itself supporting in part the tube separating and heat storing blocks or discs.
The refractory lining according to another modification of our invention is in
part cylindrical in one piece or in segments, and supported in part by the tube-
separating discs or blocks, and in part by the casing and by a central support
such as a bolt or bolts passing through a bridge stay or stays on the top of
the generator casing. Our invention is illustrated by the accompanying drawings
in which
Fig. 1. is a vertical section of a generator with central tube.
Fig. 2, vertical section of similar generator with refractory lining discs and
blocks differently formed to constitute a lining.
Fig. vertical section of the connected duplex tubes and their connections
shown in plan in Fig. 4.
Fig. 4. is a plan of the generator with the top of the casing removed and showing
the refractory lining and disc separating pieces of the kind shown in vertical sec-
tion in Fig. 2.
Fig. 5. is an horizontal section of a generator showing in vertical section in
Fig. 1, and showing the several forms of separating blocks or discs with the
flue passages formed by them.
Figs. 6, show other forms of the separating blocks which may be formed separ-
ately as shown and put together in the case so as to constitute dises in segments,
P they may be made as complete discs. The blocks may also be formed as shown
partly in dotted lines in Fig. 4, either in complete discs or in segments.
Fig. 7, is a plan of the generator shown in Fig. 1, and Fig. 8, is a section of the

page_text: ame generator at the upper part showing the method of supporting the bridge
r buck stays at the top of the case.
Figs. 9, show modified forms of the duplex tube connecting pieces.
In Figs. 1 & 5, the generator casing is lined with the vertical segmental pieces A
projection for supporting the discs C
on the lower inside of which is formed
and D and the generator tubes E and leaving the spaces (" and D' for the passage
of the gases which finally find their way through perforated segmental dises F
into the space G surrounded by blocks of refractory material, and from which the
grases pass out to a chimney as at G¹ or as indicated by dotted lines at G" Fig. 1.
The blocks D are shown in three forms in Fig. 5, the one form as shown in the
lower part of the drawing consists of alternate long and short blocks leaving alter-
nate flue spaces D. In the upper part of the same drawing the blocks Dare
formed so as to leave a continuous or unbroken annular Hue space D', in the right
hand upper part of the same drawing are shown the segmental disc-forming blocks C
which leave the Hue spaces (" near the casing instead of towards the centre of the
generator, the longer blocks D of the lower part of Fig. 5 are shown in elevation,
plan, and section in Fig. 6 and the blocks D of the upper part of Fig. 5 are shown
in Figs. 6". The disc forming blocks C of Fig. 5 are shown in elevation plan and
section in Fig. (^.
In the generator shown in Fig. 2, the blocks (and D) are similar to those
already described but are in some cases as shown in plan in Fig. 4 carried into the
centre, where they take the place of the central tube of Fig. 1. The part of the
dises (which forms the case lining may be formed as part of the disc blocks C, C,
shown in Fig. 5, or may be made of separate segmental rings similar to those
marked H which fill the space between the dises.
In the centre of the generator the discs are kept apart by blocks H¹ through the
centre of which the bolt passes and is fixed in the boss in the centre of the trans-
verse bridge piece or spider stay K. The lowest (block in Fig. 2 has a hoss
formed upon it with a central depression for the reception of the head of the bolt J
which is protected by refractory material filled into the space after the bolt is in.
In Fig. 1 grate bars for solid fuel are shown and the fuel may be fed in by the
tube M which would be fitted with a cover not shown: a fire door in the lower part
of the casing would be provided in the ordinary way for access to the fire or for
clinkering.
In Fig. 2 no grate bars are shown but they may be used instead of a liquid fuel
burner suitably placed at N which is preferable. The products of combustion in
the arrangement shown in Fig. 2 pass away through the ports or flues G into an
annular chimney space G or other form of chimney which may be convenient.
When an air condenser is employed a surrounding annular air space may be
O used to receive the air for the purpose of mixing it with the products of combus-
tion.
In Figs. 7 and 8 are stays for stiffening and supporting the upper part of the
casing and the half rings 0, 01 are put in place as shown under the projecting
flange on the top of the tube M after it has passed through the hole for it in the
5 top of the casing. the half rings being kept in their place partly by the two screws
shown & parily by the stays K K.
In Fig. 9 are shown modifications of the duplex tube connecting pieces described
in Specification 5505 of 1897. The improvement now illustrated consists in the
modification of the joint pieces a so that the connecting bolts which pass through
50 the end covers e may be outside the joint pieces and so that the joint pieces may
he of lighter construction.
Fig. 10 shows a further modification of the duplex tube connecting and joint mak-
ing pieces so that the small hole for water admission from the hole e into the inner
tube t is made by drilling through the joint casting a hole of any required size
55 as seen at d instead of putting ferrules into the tube end as heretofore.
Although we have described the arrangement of our improved steam generator

page_text: with reference to duplex tubes the arrangement of refractory materials as and for
the purposes described is equally applicable to generators with other tubes.
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 water tube steam generators the arrangement of coils or grids of tubes
and their connections alternating with layers blocks or dises of refractory material
for supporting the tubes, acting as heat accumulators and forming passages for
the products of condustion, substantially as herein described and shown.
2. In water tube steam generators the arrangement of coils or grids of tubes
alternating with layers blocks or discs of refractory material for supporting the
tubes acting as heat accumulators forming the passages for products of combus
tion and in part forming the generator case lining substantially as herein des-
cribed and shown.
3. In water tube steam generators the separation and support of the tubes by
means of refractory discs formed in one piece or in segments wedge-shaped alter-
nately towards the centre of the generator and from the centre and forming pass-
ages for the products of combustion alternately towards the centre and near the
inner periphery of the furnace substantially as herein described and shown.
Dated this 10th day of March 1898.
W. WORBY BEAUMONT.
HENRY PERCY HOLT.