Improvements in the Method of and Means for Utilising Waste Heat from Boiler and other Furnaces
Year: 1895

page_text: Date of Application, 4th May, 1895
Complete Specification Left, 4th Feb, 1896-Accepted, 14th Mar,
1896
PROVISIONAL SPECIFICATION
Improvements in the Method of and Means for Utilising Waste Heat
from Boiler and other Furnaces
We, JOHN DAWSON, of West Hill, Huddersfield, Yorkshire, Manufacturing
Chemist, and GEORGE WILLIAM OLDHAM, of Moll Spring, Netherton, near
Huddersfield, aforesaid, Silk Dyer, do hereby declare the nature of this invention
to be as follows
This invention relates to the method of and means for utilising waste heat from
boiler and other furnaces for heating water or other liquids or liquors
Our improvements consist of a suitable vessel or chamber in which is a coil or
coils of pipes or tubes preferably of small bore, arranged in any number of sections
and either in one or more tiers or stacks Lach end of said tubes communicates
with boxes preferably attached to the sides of the vessel and divided into as many
compartments as there are sections of tubes Pure cold water or the liquid oi
liquor to be heated is admitted to one of said tube boxes from any convenient
source or vessel and from thence it flows backwards and forwards through the
whole of the tubes and finally passes out at the opposite end of one of the tube
boxes into a storage tank, or should there be two oi more tiers or stacks of tubes
in the vessel, the water or liquid after leaving the lower stack, will circulate
through the next and succeeding tiers or stacks before passing out into the storage
tank The vessel or chimber contains a supply of water which surrounds the
whole of the tubes or the lower tier or tiers of sime, and whose level is maintained
by means of a supply i tern fitted with ball tap or equivalent automatic airange-
ment A centrifugal, bilge or other suitable form of pump is employed to draw
this water from the bottom of the vessel and force it to the top thereof from whence
it falls through a perforated plate or screen down into the bottom of the vessel
again in a finely divided spray or showe The heated gases and smoke from the
furnace are caused to pass through the aforesaid vessel or chamber on their way to
the chimney on uptake, and are thus brought into contact with the falling water
which, being finely divided, more readily absorbs the heat of the gases in its fall
and is heated to a high temperature
The large area of heating surface of the tubes presented to the hot water in the
vessel, or to the hot water and heated gases, ensures the rapid heating of the water
or liquid circulating through said tubes which is delivered to the storage tank at a
high temperature and can be drawn therefrom for feeding the boiler or for any
manufacturing or other purposes requiing frequent supplies of hot water or heated
liquids or liquors
By utilising the waste heat from boiler and other furnaces for heating water for
dyeing and other manufacturing purposes as hereinbefore set forth, the cost of fuel
now consumed for such purpose will be saved, and a constant supply of hot water
be kept in readines. for instant use
The vessel or chamber may be placed intermediate of the economiser, if one be
used, and the chimney, or in any other convenient or suit ible position
The subjection of the gases from the furnace to a shower or spray of water, will
prevent the emission of dense smoke from the chimney
In order to draw off the water from the vessel and all impurities or accumulations
therein, we provide a suitable valve and discharge pipe

page_text: We may combine with the vessel, a shaft having wings or arms thereon, or
other suitable means, which, when rotated or agitated will beat upon the water
in the vessel and cause it to be thrown up in small particles into contact with
the waste gases, said means being used in connection with the pump or in lieu
thereof
Dated then 2nd d
Հ
1002
Improvements in the Method of and Means for Utilising Waste Heat
from Boiler and other Furnaces
We, JOHN DAWSON, of West Hill, Hudder.field, Yorkshire, Manufacturing
Chemist, and GEORGE WILLIAM OIDHAM, of Moll Spring, Netherton, nuar
Huddersfield, aforesaid, Silk Dyer, 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
-
This invention relates to the method of and means for utilising waste heat from
boiler and other furnaces for heating water or other liquids or liquors
Our improvements consist of a suitable vessel or chamber in which is a coil oi
coils of pipes or tubes preferably composed of copper and of small bore, arranged
in any number of sections and either in one or more tiers or stacks Each end of
said tubes communicates with boxes preferably attached to the sides of the vessel
and divided into as many compartments as there are sections of tubes Pure cold
water or the liquid or liquor to be heated is admitted to one of said tube_boxes
fiom any convenient source or vessel and from thence it flows backwards and
forwards through the whole of the tubes and finally passes out at the opposite end of
one of the tube boxes into a storage tank, or should there be two or more tiers or
stacks of tubes in the vessel, the water or liquid after leaving the lower stack, will
circulate through the next and succeeding tiers or stacks before passing out into
the storage tank
A volume of water is at intervals admitted to the top of the vessel or chamber
from whence it falls through a perforated plate or screen down over the tubes into
the bottom of the vessel in a finely divided spray or shower, whereby all the carbon
and soot deposited on said tubes is washed off The heated gases and smoke from
the furnace arc caused to pass through the aforesaid vessel or chamber on their
way to the chimney or uptake, and are thus brought into contact with and pass
around the tubes which present a large area of heating surface and ensure the
rapid heating of the water or liquid cuiculating through them which is delivered
to the storage tank at a high temperature and can be drawn upon for feeding the
boiler or for dyeing or any manufacturing or other purposes requiring frequent
supplies of hot water or heated liquids or liquois
Having thus set forth the nature and object of our said invention we will now
fully describe and ascertain the same for which purpose reference is hereafter
had to the annexed sheet of drawings forming a part of this Specification
wherein
Tig is vertical section, taken on line 1-2 of Fig 2, of our improved
apparatus for utilising waste heat or gases from boiler and other furnaces for
heating water or other liquids or liquors and
Fig 2 is transverse section of same taken on line 3-4
Referring to the drawings A represents a chamber in which are enclosed a series
of tubes B, preferably composed of copper and of small boie, arranged in any
number of sections, and in one, two or more ticis or stacks, each end of said tubes

page_text: The
communicating with tube boxes C, D, attached to the sides of the chamber,
whereby a constant stream of water may cuculate backwards and forwards through
the whole series of same from the inlet to the outlet end of the apparatus
tube boxes C, D, of which there are three shewn on each side, are by preference,
cast separately and fitted together in the apparatus, wherein they are built up
edgewise one on the top of the other and bolted together and to the sides E, E, of
the chamber, somewhat as shewn, the sides or plates F F, being subsequently
fitted against the open sides of the boxes and secured thereto by bolts or set sciews
so as to seal up and make the same watertight
The opposing edges of the tube boxes as also the engaging surfaces between the
plates or lids F, F, and said boxes, are planed or faced in order that the parts may
be properly and accurately fitted together and tight joints made Whether the
plates F, F, are made the same size as the side of the chamber or in one or more
parts or suctions, they are preferably adapted to be bolted to the Loxes as set
forth so that they can be easily removed as occasion require to give access to
the tube boxes for examination of the tubes or other parts
The boxes D on one side of the chamber are divided houzontally in the centre
by a rib or partition G into two boxes or compartments to cause the water, or
other liquid or liquor to cuculate through each successive tier or stack of tubes
We may, however, further divide the boxes D houzontally and also vertically, in
which case the boxes C would have to be divided into compartments corre-
spondingly to direct the flow of water from one compartment in the boxes at
one side to a compartment in the opposite boxes and from thence back again to a
second compartment in the first named boxes, or backwards and forwards either
in a vertical direction alone, or in both a horizontal and vertical direction
It will, of course, be obvious that the same result would be obtained by building
up more boxes one above the other, or end to end
Openings of rather larger diameter than the diameter of the tubes B are bored
through the inner sides or walls of the tube boxes to receive the ends of said
tubes which are inserted into short wood feules on bushes H driven tightly into
said openings in the boxes We compress the ferrules oi bu hes before using in
order to make them as solid as possible and they ate subsequently diven into the
openings in the tube boxes in a dry condition When moistened, the bushes
expand and bind tightly around the tubes and against the sides of the openings
whilst the extremities engage with the inner and outer faces of the walls of the
tube boxes and thereby make a secure and tight joint between tubes and boxes
Although we find wood bushes to answer well for making tight joints, and are
cheap, we do not bind ourselves to use them, as other methods of caulking of
making watertight joints may be adopted where it is expedient or necessary, or
found to be cheaper and as effectual
The water or other liquid or liquor to be heated enters or is fed or forced
through pipe I into the bottom compartment of the lowest box D and flows there-
from through the section of tubes open to said compartment into the opposite
box C from whence it flows back through the next section of tubes into the upper
chamber of the lower box D and passes out of same through an opening or
thoroughfare J into the lower chamber of the second box D and then circulates
through the tubes into the opposite box and so on as clearly indicated by the
arrows in Fig 1 until finally it enters the upper compartment of the topmost
box D To this compartiment is coupled the outlet pipe K which conveys the
water or liquid away to any place where hot water is required, or it may discharge
it into a storage tank or cistein
Instead of the water passing from one to another of the boxes D through the
openings J, it may be conveyed from box to box by pipes J¹ as indicated in dotted
lines
The chamber or casing A is placed in any suitable and convenient position
intermediate of the furnace, or the economisei, if one be used, and the uptake or
chimney, and if not built up within the flue, it may be jacketed or covered or

page_text: coated with non conducting material or composition to prevent radiation of beat
from the chamber
The waste heat and gases from the furnace enter the chamber A through the
opening at the lower end thereof (see Fig 2) and after passing upwards through
the chamber escape at the opening M into the flue or uptake
In thus directing the waste gases and heat from the furnace through the
chamber, they impinge upon and envelope the whole of the tubes whereby the
water or other liquid or liquo ciculating through same is rapidly heated to a
high temperature and can be immediately drawn upon for dyeing and other
manufacturing processes
The water, instead of being cnculated upwards through the tubes may be caused
to circulate downwards and if the pressure is not sufficient for this purpose a pump
may be employed to aid it In order to remove all carbon and solid matter which
is deposited on the tubes by the waste gases in passing through the chamber we
secure near the top of the chamber a perforated plate N above which is sufficient
space to hold a quantity of water which is admitted through pipe O at stated or
irregular intervals of time either by any onamary automatic arrangement for giving
a periodic flush of water or by opening valve
The water or it may be steam admitted to the aforesaid space passes through the
perforations in plate N and is thus divided into a spray or fine particles which fall
like shower on to the tubes B and effectually wash off all impurities which are
carried into the bottom of the chamber and discharged therefrom through
Pipe P
The said pipe is provided with an S tiap o bend (not shewn) which whilst
allowing the impure water to escape, prevents the admission of cold air into the
chamber The intermittent show ei of water or steam descending over the tubes
serves to keep them perfectly clean and acts instead of scrape, which could not
be employed in connection with apparatus such as herein described
We find that a continuous shower bath reduces the temperature and therefore
only use it at such intervals as may be found necessary to clean the tubes
By utilising the waste heat from boiler and other furnaces as herein before set
forth for heating water or other liquids or liquors for dyeing and other manu-
facturing purposes, the cost of fuel now consumed for such pui pose will be saved
and a constant supply of hot water or liquor be kept in readiness for instant use
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the ame is to be carried into effect we declare that what
we claim is
-
Firstly The method of and means for utilising the waste heat and gases
from boiler and other furnaces for heating water or other liquids or liquor,
combined with means whereby an intermittent shower of water or steam may be
caused to descend over the tubes for cleaning same all substantially as herein
shewn and de cuibed
Secondly The general arrangement, construction and combination of the several
parts comprising the herein described apparatus for utilising heated gases from
boiler and other furnaces for heating water or other liquids or liquor
Dated this 3rd day of February 1896
TASKER & CROSSLEY,
Huddersfield, Patent Agents