Improvements in and relating to Steam or Vapour Generators.
Year: 1895

page_text: Date of Application, 9th Aug., 1895-Accepted, 14th Sept., 1895
COMPLETE SPECIFICATION.
Improvements in and relating to Steam or Vapour Generators.
I, ADRIEN HUET, Civil Engineer, of Delft, Holland, do hereby declare the
nature of my invention for "Improvements in and relating to steam or vapour
generators," and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement; reference being had
to the accompanying drawing and to the letters and figures marked thereon, that is
to say:
This invention has reference to and comprises a new and improved apparatus
for generating steam or vapour under pressure in a superior manner to the
appliances heretofore in use for this purpose. And in order that my invention may
be properly understood I have hereunto appended an explanatory drawing in
which the same reference letters are used to indicate corresponding parts in the
figures where shown.
Figure 1 is a sectional elevation of the new apparatus.
Figure 2 is a horizontal section on line 1-1 of Figure 1.
A is the shell of the boiler containing in its interior the heat accumulator C and
provided with a bottom supporting the heat producer or furnace. The heat
accumulator C consists of one or more tubes made of incombustible material as is
shown in the drawing.
By the feed pipe a provided with a check valve and cock not shown in the
drawing the feed water is introduced by a force punip and flows through one or
more spiral tubes b, c, in the interior of the boiler ending in a receiver or
expander D, in which it has to pass a valve d. As is shown in the drawing the
water may first proceed downwards through a spiral tube bb and then upwards
through a spiral tube c c. The water is heated in the spiral tubes and escapes as
hot water or as wet steam in the receiver D. This receiver may be provided with
drain cock 8, a gauge glass rr and a manometer q. The drain cock may be used
the water is evaporated before being introduced into the receiver, and the gauge
glass if it is heated or super heated only, but not evaporated. This can be
regulated arbitrarily by the valve d. The water leaves the receiver D as wet
steam through the second valve c and flows through one or more other spiral tubes
in the interior of the boiler in which it is heated again and dried delivering in to
the boiler space itself.
As shown in the drawing the steam or vapour may descend through a tube f
into a spiral tube g in which it rises to escape at h or in any other convenient
manner. The steam introduced in the boiler space is then superheated by being
mixed with the hot gases furnished by the combustion in the furnace.
furnace E is made of fire-brick or any other incombustible material and may rest
on the inside of the boiler bottom.
The
The fuel which may be any suitable gas or liquid, such as illuminating gas,
Dowson gas, oil, petroleum, naphtha or the like is forced into the boiler, by
a pump or other means through the pipe i which is placed on the outside of the
boiler and this pipe is connected to one or more burners or nozzles ; fitted in the
inside of the furnace.
The air for burning the fuel is forced by pumps or other means through the
pipe which is placed on the outside of the boiler in the same way as pipe i.
The pipe is connected to the aforesaid burners or nozzles fitted in the inside
of the boiler and supplies the necessary air for the combustion. These burners or

page_text: nozzles may be arranged in any suitable form, on the Bunsen or any other system,
and by them may be burnt any suitable liquid or gaseous fuel mixed with cold or
hot air. The quantities of fuel and air may be regulated, as is shown in the drawing
by valves or needles kk fitted in the air and gas supply tubes, or on the burners or
nozzles. The flames can be lighted by any suitable instrument such as a torch or
wick, through the hole m or it may be done electrically. The boiler must of course
be provided with the ordinary appendages, such as steam valve n safety valve o
pressure guage 9 glass gauge or gauge cocks rr and blow off cocks s and t.
The boiler will work in the following manner
The feed water or fluid to be evaporated is forced through the feed pipe a, flows
through the spiral tubes 6 b c c which present a large heating surface and is heated
by the flames of the burners placed in the furnace E. The said feed water after
being beated escapes from the tube c through the valved in the receiver or expander
as hot water or wet steam. In the first case it will evaporate in the expander D
in the second case it will only expand, and flow as 'more or less wel. steam through the
The it passes the tubes f g g and is heated again by the flames of the
burners placed in the furnace E.
valve e.
The steam after being dried in the tubes 9 9 escapes at 7 into the steam space of
the boiler where it is superheated by being mixed with the hot gases furnished by
the combustion in the furnace E.
The superheated steam and the hot gase of combustion mixed together are let
off by the steam valve n to work the engine or engines or to be used for heating
purposes or the like.
When starting the boiler the fuel and air pumps are set to work, the flames are
lighted by a torch or wick through the hole m and having closed this hole the feed
of water or fluid is set in operatiou. The lighting may also be done electrically.
The evaporation may be regulated by a feed cock fitted to a check valve at a
by the escape valve d and the inlet valve e. The combustion is regulated by the
cocks or needles k k k.
The steam may be produced either wet, dry or superheated to any desired degree
and the boiler can be started or stopped at any notice.
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 :-
First. A steam or vapour generator provided in its interior with a system of
spiral tubes ending in the boiler space and having an externally arranged receiver
or expander through which the feed water or wet steam is forced, and in which it
is evaporated or expanded to be afterwards superheated by being mixed with the
hot gases of one or more burners in the interior of the boiler, in which is burnt any
suitable liquid or gaseous fuel, mixed with air and forced under pressure in the
boiler and by which the said spiral tubes are heated, substantially as herein
described in reference to and shown in the accompanying drawings.
Second. The arrangement in combination of the parts of a steam or vapour
generator, substantially as herein described in reference to and shown in the
accompanying drawings.
Dated the 8th day of August'1895.
W: R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.