Improvements in Devices for Heating and Evaporating Liquids.
Year: 1898

page_text: .
PROVISIONAL SPECIFICATION.
Improvements in Devices for Heating and Evaporating Liquids.
I, WALTER SCOTT, Manager of the Pluto Hot Water Syndicate Limited, of
52, Queen Victoria Street, in the City of London, do hereby declare the nature
of this invention to be as follows:-
This invention relates to devices for heating and evaporating liquids and is
particularly applicable for the heating of water and the like by the means of
a luminous flame, such as from gas or oil, so that heating and illuminating
features of the flame are simultaneously utilized with high efficiency.
In order to carry this invention into effect I form an annular water chamber,
the outermost wall of which is practically cylindrical while the innermost
wall is conical, with step projections which form hot air bafflers and increase
the heating surfaces.
In order to provide for the ready cleansing of the interior from scale and
similar deposits make the outer wall separate from the inner wall, and I
join them together by flanges or their equivalent, held together by bolts, nuts,
screws or other similar devices.
I provide means at the lower part of the chamber for connection of the
feed water, and at the upper part I fit a communicating pipe or pipes which
lead to the top of a super-heater placed in the axis of the annular chamber
within the same.
This super-heater I also make conical and of such a size as to leave an
annular passage between the outside of the super-heater and the internal peri-
phery of the annular stepped conical chamber, for the passage of the heated
air and products of combustion. At the lower part of the super-heater I
arrange a pipe or pipes for taking away the steam. Around the outside of
the annular chamber and covering the same I fit a non-conducting hood to
retain the heat as far as possible, so that the heat from flame situated below
the super-heater will pass up the annular channel between the super heater
and annular water chamber and thence round the top of the water chamber
down the outside thereof to the base of the hood, where apertures are made
communicating with the external atmosphere.
This arrangement of boiler and super-heater allows water to be readily
evaporated without the blocking up of the connecting pipes and small passages
with deposit, and permits of the removal of deposit from the water chamber
with great facility. It is therefore applicable for use in heating systems when
a minimum of attention is desired.
Dated this 7th day of Santomhan 1000
FELL & JAMES,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicant.

page_text: Improvements in Devices for Heating and Evaporating Liquids.
I, WALTER SCorr, of 39, Dartmouth Park Hill, in the County of London,
Engineer, late Manager of the Pluto Hot Water Syndicate, Limited, of
52, Queen Victoria Street, in the City of London, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be parti-
cularly described and ascertained in and by the following statement:-
1
This invention relates to improved devices for heating and evaporating
liquids and is applicable for heating water and the like, and for generating
steam by means of heat given out from Bunsen and luminous flames, produced
either from gas, oil or fuel whereby the heating and illuminating features of
luminous flames, such as adopted for street lamps and the like, may be simul-
taneously utilized with very high efficiency if the flames situated underneath
the evaporator are so adjusted as to be at the most effective heating distance
from the evaporator, which evaporator is suspended in the axis of the annular
water chamber or generator and within same as herewith described.
In order that my invention may be clearly understood and readily carried
into effect, I will describe the same more fully with reference to the accom-
panying drawings, in which:-
:
Fig. 1, is a sectional elevation of water chamber constructed with step pro-
jections and with the inner and outer walls made separately and secured
together by stud screws and a screw worm collar.
Fig. 2, is a sectional elevation of water chamber connecting pipes evaparator
and feed water and discharge steam pipes.
Fig. 3, is a sectional plan of Fig. 2 in both of which figures, like letters,
indicate similar parts.
Fig. 2, shews the water chamber or generator with the whole of the outer
wall and the uppermost portion of the inner wall almost cylindrical, both
walls having horizontal flanges B B projecting at the top, while the lower
portion of the inner wall, which is of an increased circumference, is slightly
conical, and upon the periphery of this lower inner wall I form vertical ribs
or feather projections C for more effectually retaining heat from flames fixed
below, and in addition I provide a step projection D which is formed through
the difference in the reduced circumference of the upper inner wall to that of
the lower inner wall, the step projection D separating the two inner walls and
increasing the heating surface which also forms a hot air retarder and baffler.
To more readily facilitate the frequent examination of interior of the water
chamber or generator, and also to arrange for the same being periodically
cleansed from scale and similar deposits, I provide an independent top cover E
in the form of a disc, which I fit to the horizontal projecting flanges B B
already attached to the top of the outer and inner wall peripheries of the
annular water chamber, and I secure this disc cover E thereto with bolts and
nuts or screws or by other similar methods; I also provide an arrangement
for feed water to enter the annular chamber under pressure at the lower part
by a connecting feed pipe F, this being supplied direct either from the water
main supply service or by a force pump or an elevated storage tank.
Upon the top of the disc cover of the water chamber and secured thereto
by a worm male and female joint I connect one end of an elbow communi-
cating pipe G and to the other end of same I couple a similar elbow commu-
nicating pipe by faced flanged joints H H bolted or screwed together, and to
the other extreme end of the second coupled communicating pipe I attach a
super heater or evaporator I, also by means of a worm male and female joint,

page_text: which evaporator I form in part cylindrical and in part conical, and the bottom
or conical part of this evaporator I construct either perfectly straight or with
convex or concave smooth surfaces, but preferably with rising step projections
of increasing diameters formed either square, angular or convex, so as to more
effectually catch the waves of heated air that must necessarily ascend from the
flames situated underneath the evaporator I while passing from such flames
to the angular channels or spaces J provided between the outside of evaporator
and connecting pipes, and the internal peripheries of the water chamber, which
channels also allow for the escape of the products of combustion.
To the lowest portion of the super heater or evaporator I connect by worm
male or female joint a suitable steam conveying pipe K to conduct the steam
from evaporator for the purpose for which it is to be used such as (to a storage
tank of cold water) into and through coils or pipes immersed therein and for
heating same to a high temperature or for radiating heat by means of steam
or hot water through pipes supplied with steam direct from the evaporator.
Around the outside and over the top of ithe angular water chamber and for
completely protecting same from the cold air, I provide a double metal casing
or hood L with inner and outer walls (between which I insert a thickness of
slag wool or other suitable non conducting material) which confines and
retains the heat from flames when passing upwards, such heat being diverted
to escape only by the proper channels arranged for it to pass away, and through
holes N inserted at the bottom of double cased packed hood where such aper-
tures are made to communicate into an outer or weather hood and from
thence the products of combustion are allowed to escape into the external
atmosphere.
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:
1st. In a liquid heating device the combination of an annular liquid chamber
with a superheating device situated within the said annular chamber and
means for connecting the top of the annular chamber with the top of the super-
heating device described.
2. An arrangement and combination of parts herein described for effecting
the purposes substantially as set forth and illustrated in the accompanying
drawings.