Improvements in Boiler Feed-water Heating Apparatus.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Boiler Feed-water Heating Apparatus.
I, JULIEN FRANÇOIS LEMOINE, of Hallines, near Wizernes, Pas de Calais,
France, Engineer, do hereby declare the nature of this invention to be as
follows:-
The present invention relates to an improvement in heat economisers, and has
for its object to ensure the certain and regular circulation of water throughout
the whole apparatus.
It is understood that these economiser apparatus are commonly composed of .
a series of tubes, vertical, or nearly vertical, placed in the heating chamber, and
consequently enveloped by the hot gases, through which tubes the feed water
is made to pass before being sent to the boilers. A portion of the lost heat is
thus recovered, and, in addition, is obtained the advantage of a partial detartra-
tion, or purification, of the water.
The drawback to economising apparatus as hitherto constructed, is that the
utilisation of the heat is not as good as it might be, because the water does not
circulate with sufficient regularity in the whole series of tubes, and that certain
of these latter remain almost unused, whilst others receive a considerably too
great inrush of water.
In the system of economiser which forms the subject of the present applica-
tion for patent, all the tubes are utilized, and the circulation therein is very
regular, thus giving as perfect a recovery of the lost heat as possible.
My apparatus is constituted of a series of juxtaposed clements, on divisions.
Each element comprises a series of vertical, or nearly vertical, tubes, connected
at their upper and lower extremities by two collector tubes. The upper tube
is divided into two unequal parts by a partition, one of these parts communicates
with a tube, or several tubes, of the element or division, and is furnished with
a water inlet pipe. The other part, which communicates with the remainder
of the tubes, is furnished with a water-outlet pipe. The outlet pipe of each
element is connected to the inlet pipe of the element following by a bent tube;
a continuous circuit is thus formed from the inlet tube of one extreme element,
to the outlet tube of the other extreme element.
The water entering each element by the lesser section, descends with force
through one or more tubes; it first arrives in the lower collector, where it s
projected along all the length of this latter; it then reascends simultaneously
by all the tubes belonging to the second partition; having arrived in this part
of the upper collector, it leaves by the outlet pipe, whence it passes to the inlet.
pipe of the next element, and so on, to the last element. It will be understood
that a very regular circulation, and one distributed over the whole series of
tubes, is thus ensured.
It will be seen that all the tubes without exception are in the interior of the

page_text: heating chamber, and consequently there is no cooling of the water possible at
any particular point of the circuit.
All the lower collectors are united by a general collector, and each of them
communicates with this latter by a safety valve, which normally remains closed,
but which opens to put the collector's in communication with the general con-
duit, when it is desired to introduce a scraper to remove sediments.
Datel thin 1941
J
1900
I, JULIEN FRANÇOIS LEMOINE, of Hallines, near Wizernos, Pas de Calais,
France, Engineer, do hereby declare the nature of this invention, and in what
manner the same. is to be performed, to be particularly described .and.ascer-
tained in and by the following statement:-
-
The present invention relates to an improvement in heat economisers, and has
for its object to ensure the certain and regular circulation of water throughout
the whole apparatus.
In order to leave no doubt as to the nature of my invention, I have repre-
sented, in the annexed drawing, an economiser constructed according to my
invention.
Figs. 1 and 2 are views in elevation from two different sides.
Fig. 3 is a plan view.
It is understood that these economiser apparatus are commonly. composed of
a series of tubes, vertical or nearly vertical, placed in the heating chamber, and
consequently enveloped by the hot gases, and through which tubes the feed-water
is made to pass before being sent to the boilers. A portion of the lost heat is
thus recovered, and in addition, is obtained the advantage of a partial detartra-
tion or purification of the water.
The drawback to heat economising apparatus as hitherto constructed, is that the
utilization of the heat is not as good as it might be, because the water does not
circulate with sufficient regularity in the whole series of tubes, and that .certain
of these latter remain almost unused, whilst others receive a considerably too
great inrush of water.
In the system of economiser which forms the subject of the present .applica-
tion for a patent, all the tubes are utilized, and the circulation therein is very
regular, thus giving as perfect a recovery of the lost heat as possible.
My apparatus is constituted of a series of juxtaposed elements, or divisions.
Each element comprises a series of vertical, or nearly vertical tubes, A,. A, A,
connected at their upper and lower extremities by two collector tubes Band. C.
The upper tube B is divided into two unequal parts 661 by a partition 62; one
of these parts & communicates with one or more of the tubes A, and is furnished
with a water-inlet pipe D. The other part 6', which communicates with the
remainder of the tubes A, is furnished with a water outlet pipe E. The outlet
pipe of each clement is connected to the inlet pipe of the next element by a
bent connection F; a continuous circuit is thus formed from the inlet tube .of
one extreme, to the outlet tube of the other extreme element.
The water entering each element by the lesser section b, descends with force
through one or more tubes A: it first arrives in the lower collector C, where it
is projected along all the length of this latter; it then reascends simultaneously

page_text: by all the tubes A connected to the second section 61; having arrived in this part
of the upper collector, it leaves by the outlet pipe E, whence it passes to the inlet
pipe D of the next element, and so on to the last element. It will be understood
that a very regular circulation, and one distributed over the whole series of tubes,
is thus ensured.
It will be seen that all the tubes without exception are in the interior of the
heating chamber, and consequently there is no cooling of the water possible at
any particular point of the circuit.
All the lower collectors are united by a general collector G, and each of them
communicates with this latter by a safety valve, which normally remains closed,
but which opens to put the collectors in communication with the general con-
duit, when it is desired to introduce a scraper to remove sediments.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what
I claim is
1. A heat economising apparatus, comprising a series of vertical or nearly
vertical tubes, connected at top and bottom by collectors, the upper collector
being divided into two parts, one corresponding to one or more tubes of the
apparatus, and furnished with an inlet pipe, the other corresponding to the
remainder of the tubes, and furnished with an outlet pipe, in such manner that
the water entering the inlet descends by one or more tubes, and ascends in the
remainder of the tubes, as has been explained and specified with reference to the
accompanying drawing.
2. The heat economizing apparatus constructed of a series of elements com-
prising the features claimed in Claim 1, the outlet tube of each being connected
to the inlet tube of the next, and all the lower collectors being (for the sake of
cleaning) in communication with a common conduit, as has been explained and
described with reference to the accompanying drawings.
Datal this 12th dov of January 1899
NEWTON & SON,
Agents for the Applicant.