APPARATUS FOR HEATING OR SUPERHEATING WATER
Year: 1884

page_text: COMPLETE SPECIFICATION.
I ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex
Engineer, do hereby declare the nature of this invention for "APPARATUS FOR
HEATING OR SUPERHEATING WATER" (a communication) 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 a system of heating whereby water thoroughly warmed
or heated by the escaping gases of combustion of á furnace is used for beating or
evaporating apparatus such as are employed in sugar factories and dye-houses. In
establishments of that class it has heretofore in most cases been customary to use
steam for boiling down juices and syrups in sugar factories and for keeping
considerable quantities of dye hot.
According to the method hereinafter described this result is however to be
obtained in a more economical manner by arranging this system in the smoke flue
or the smoke stack of the steam boiler or heating apparatus.
In the accompanying drawings is shown in
Figure 1 side view of a coiled system of heating pipes, also called a heating battery.
Figure 2 plan of figure 1 (seen from the top).
Figure 3 vertical section on line a b.
Figure 4. a modification of the construction shown in Figure 1.
Figure 5 top view of Figure 4.
Figure 6. a second modification of the construction shown in figure 1.
Figure 7 top view of Figure 6 with double elbow extension connecting with the
collector or accumulator.
Figures 8 and 9 longitudinal section and end view of a double branch pipe.
Figures 10 and 11 modification of a double tube of a different form and on a
arger scale.
Figures 12 and 13 show the collector or accumulator in section and top view.
The system of pipes or tubes shown in Figure 1 consists of several metal tubes d
having thin walls and coiled; the ends bbb of these are suitably fixed in the
walls of the cast iron tubes a a' so that the interior of a is connected with that
of a. The tubes d are coiled and their walls thin for the following reasons
1) So as to offer as large a heating surface as possible to the gases of combustion
escaping through the flue of the furnace the heat of such gases being always
considerably above the boiling point of water.
Figure 6. a second modification of the construction shown in figure 1.
Figure 7 top view of Figure 6 with double elbow extension connecting with the
collector or accumulator.
Figures 8 and 9 longitudinal section and end view of a double branch pipe.
Figures 10 and 11 modification of a double tube of a different form and on a
arger scale.
Figures 12 and 13 show the collector or accumulator in section and top view.
The system of pipes or tubes shown in Figure 1 consists of several metal tubes d
having thin walls and coiled; the ends bbb of these are suitably fixed in the
walls of the cast iron tubes a a' so that the interior of a is connected with that
of a¹. The tubes & are coiled and their walls thin for the following reasons
1) So as to offer as large a heating surface as possible to the gases of combustion
escaping through the flue of the furnace the heat of such gases being always
considerably above the boiling point of water.

page_text: 2) So as to admit of as large a number of tubes as possible to be set in the flues
which generally are of but little height and
3) So as to allow expansion and contraction under the frequently varying tempera-
ture of the escaping gases of combustion without causing leakages at the joints
(e fig 1).
The cold water enters by the elbow e into the tube a' and in consequence of its
being continuously heated when passing through the system of coiled pipes dd
which is surrounded by the gases of combustion passes out through the elbow fon
the tube a and is directly led to the spot where it is to be used say a hot water
bath or the heating coil of an evaporating apparatus as in a sugar manufactory.
It is obvious that in factories where large furnaces are extant the herein described
hot water-beating apparatus may be cheaply readily and advantageously used
instead of other apparatus for warming workshops offices and the like.
The whole system is based upon the circulation of water in an arrangement of
closed tubes one end of which is heated.
Between the exit pipe f for the hot water and the inlet pipe e a vessel which
I term the accumulator and which is shown at g figures 8 and 9 is inserted which
not only serves for regulating the pressure in the system of pipes and as an
expansion vessel but also as a reservoir to provide for slight leakages in the
conduit pipes.
In figures 8 and 9 is shown the accumulator constructed in a well known
manner and inserted between the inlet and outlet for the cold and hot water
respectively and serving as stated as a pressure regulator, expansion vessel and as
reservoir to provide for any leakage that may take place.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
A system of heating tubes for heating or superheating water for use in sugar
factories dye-houses and the like in which the water is heated in numerous and
thin columns or layers by means of the thin metal tubes shown in figures 1. 4 and 6.
provided in the flue of a furnace or in the smoke stack so that the water absorbs
the heat of the escaping gases of combustion an accumulator placed between the
inlet for cold water and the outlet for hot water being employed to serve for
regulating the pressure should it become excessive in the tubes.
Dated this 10th day of July 1884.