or for other analogous Purposes Requiring Hot Blast.
Year: 1885

page_text: or for other analogous Purposes Requiring Hot Blast.
I, WILLIAM THOMLINSON of West Hartlepool in the County of Durham Iron-
master do hereby declare the nature of said Invention for "IMPROVEMENTS IN
STOVES FOR HEATING THE BLAST FOR BLAST FURNACES OR FOR OTHER ANALOGOUS
PURPOSES REQUIRING HOT BLAST to be as follows:—
"
My Invention relates to improvements in the construction of stoves suitable for
heating blast or currents of air or gas to the temperature required for blast furnaces
or other analogous purposes requiring hot blast or heated currents of air or gas,
known as regenerative stoves, or apparatus, the interior of which are constructed
of fire bricks or other refractory material capable of absorbing heat from gas or
other products, heated or caused by combustion and of giving off the heat so
absorbed to the blast or current of air or gas which is afterwards passed through
the stove.
The object of my Invention is to make the combustion chamber easily removable
from the regenerative parts of the stove for the purpose of renewal, to produce
a much better dispersion of the hot gases or blast into every portion of the
regenerator intended as heating surface for the purpose of speedy heating and a
better retention of the heat when absorbed; the general arrangement by which
I effect these improvements also enables me to provide a top to the stove of great
strength, and to increase the facilities of cleaning the flues and passages of the
regenerator. In using these stoves two or more stoves are employed alternately or
in rotation, so that each stove may be first heated by the combustion of gas
supplied from the blast furnace or other source, into which the current of air or
gas to be heated is afterwards introduced to absorb the heat on its passage through
the stove.
In carrying out my Invention I provide within a casing of cast iron, wrot iron, -
steel or other suitable casing a combustion chamber leading into a regenerator and
provided in the usual manner with inlet valves for the gas and for the air required
for its combustion and with an outlet valve for the hot, blast connected to the
combustion chamber together with the usual provisions for conveying the products
of combustion from the generator to the chimney, and for getting access into
the interior of the stove for cleaning examination or other purposes. In order to

page_text: construct the stove in such a manner that the combustion chamber may be easily
and entirely removed from the stove when requiring renewal, without detriment to
the strength or damage to the structural arrangement of the regenerative parts.
I divide the stove, which may be circular elliptical, or any other suitable form in
sectional area, preferably, into four compartments or sections, by vertical walls of
suitable strength and intersecting preferably at right angles in the centre of the
stove but I may if required divide the area into more than four compartments or
sections and intersect at any other angle and at any other convenient part of the
stove the object being to occupy one division with the combustion chamber, and
the other divisions with sections of the regenerator. Each of the sections of the
regenerator is provided with heating surface formed in the well known manner by
walls forming spaces or interstices. The communication from the combustion
chamber through the divisions of the regenerator to the gas outlet is formed in the
usual manner by means of openings or arches through the vertical division walls
so that the hot gas after ascending the combustion chamber passes to the top of
the first division of the regenerator and descending thence through the passages or
Hues of this division into the bottom of an adjoining or second division of the
regenerator, through which it travels in ascending currents to the top of the third
division of the regenerator, and passes from this division, or in the case of more
than three divisions in the generator, from the last of these divisions, in the usual
manner into a chimney-The current to be heated travels through the stove in
precisely the same manner, but in the opposite direction that is, it enters the last
division of the regenerator and passes successively through the remaining divisions
into the combustion chamber effecting its outlet in the usual manner through the
hot blast valve-This arrangement obviates the defects common in hot blast
regenerative stoves wherein the gas passing through the stove instead of being
effectually dispersed over the entire heating surface follows the current caused by
the draught of the chimney and travels with the greatest velocity along the line
of this current which renders much of the surface intended as heating surface
comparatively ineffective-By covering the combustion chamber and each division
of the regenerator with an arched roof, the top of the stove may be supported on
four or more arches, supporting each other securing thereby great strength and
increased facilities for cleaning the flues or passages of the regenerator, for which
purpose I provide suitable doors on the top of the stove, other cleaning doors are
also provided at the lower part of the stove some of which may if desirable be
constructed in any suitable manner to fly open when required, so as to act as self
cleaning doors. I fix an easily removable gallery round the top of the stove at
such positions as to afford ready access through the cleaning doors to the interior
of the stove, which may thus be scraped and cleaned in the usual manner with
only slight interference to the current work of the stove.

page_text: Improvements in Stoves for Heating the Blast for Blast Furnaces
or for other analogous Purposes requiring Hot Blast.
I WILLIAM THOMLINSON of West Hartlepool in the County of Durham Iron-
master 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 :-
My Invention consists of improvements in the structural arrangement and
combination of parts of stoves known as regenerative stoves of the kind employed
for heating blast to a temperature sufficient to promote combustion in blast
furnaces the interior of which stoves are constructed of fire bricks or other
refractory material capable of absorbing heat from gas passing through the stove
at a high temperature and of giving off the beat so absorbed to currents of air or
gas which are afterwards passed through the stove as blast to support the
combustion in the blast furnace.
In using these stoves two or more stoves are employed alternately or in rotation
so that one stove may be accumulating heat from the combustion of gas in the
usual manner whilst another stove is supplying hot blast to the blast furnace by
giving up heat so accumulated to currents of air or gas passing through it.
According to my invention I construct a complete stove within one outside wall
or casing the internal arrangement of which stove consists of a combustion
chamber of great strength, and easily removable from the other parts of stove
when required to be renewed, and of a regenerator in which, by means of an
angular or circuitous travel, the bot gases from the combustion chamber are
dispersed over the entire heating surface provided therein instead of passing over
a limited surface which falls within a direct line of travel from the combustion
chamber to the chimney; the arrangement of division walls are such that I am
enabled to construct a roof of great strength consisting internally of a system of
arches corresponding with the system of division walls upon which they are
supported and externally the roof is sufficiently dished to throw off water but
sufficiently flat to admit of being tied together by a system of girders.
I provide at the lower part of the stove a door (or doors) which may be used
for access to the interior of the stove for cleaning it by the usual appliances and
methods, or which may be made to ty suddenly open and act as a self cleaning
door.
And in order that my Invention may be fully understood I will now proceed
particularly to describe the same and for that purpose shall refer to the accom-
panying drawings wherein like letters of reference are employed to indicate the
same parts in all the figures, figure 1 is a vertical sectional view of a stove
constructed according to my invention the section being taken anglewise on
line y. y of figure 2, figure 2 illustrates a suitable method of arranging two stoves
side by side one stove being illustrated in plan and the adjoining stove in sectional
plan the section being taken along line xx of figure 1, figures 3 and 4 illustrate
on an enlarged scale a combination cleaning and self cleaning door constructed

page_text: of
according to my invention figure 3 being a sectional view taken along line
figure 4 In figures 1 and 2 A is the combustion chamber B. C. and D sections or
compartments of the regenerative chamber all of which are enclosed with one
casing or outer walls E. The stove is provided at F. G. and H respectively with
a gas valve hot blast valve and chimney valve, these together with inlets for the
admission of air to set up the combustion of the gas may be of the kind usually
employed in blast furnace practice and form no part of my invention, nor does the
external form of the stove, which may be of any form in sectional area found to
be suitable, the usual circular form being that most generally applicable for hot
blast stoves is the form in which the stove is illustrated in figures and 2.
K¹ K³ K³ and K' are vertical division walls intersecting at some suitable point and
extending in suitable directions to the outer or circumferential wall E these
division walls divide the stove into sections or compartments extending from the
floor to the roof one of which contains the combustion chamber and the others the
regenerative chamber. In figures 1 and 2 four walls are shown at right angles to
each other intersecting at the centre of the stove, this arrangement may be
modified without departing from the nature of my invention as for instance more
than four walls may intersect or meet at one point according to the number of
sections to be provided in the regenerator and the point of intersection may or
may not be central according to the intended relative sizes of the combustion
chamber and the sections or compartments of the regenerator. The combustion
chamber A is enclosed between two vertical division walls K¹ K' and the outside
wall E, and is therefore of great strength, from this position it can be removed
without deteriment to the strength of or damage to the other parts of the stove
thereby securing a prompt and easy renewal as compared with stoves of the
ordinary construction. The other compartments B. C. and D form sections of the
regenerator and are provided with the usual arrangements of flues and passages
so as to expose a sufficiently large heating surface to the currents of gas or air
passed through the stove openings provided in the upper or lower parts of the
division walls as required form communications from section to section of the stove,
so that the heated gases ascending the combustion chamber A pass over the
division wall K₁ into the regenerator and descend through section B and under
the division wall K into section C, and ascend through section C over division
wall K³ into section D and descend through this section to the chimney. By this
arrangement of the sections of the regenerator the gas currents are thoroughly
dispersed over a large surface being compelled to travel in an angular or circuitous
direction from section to section instead passing through the stove in a line of
travel corresponding to the draught of the chimney as in the case of regenerators
made up of parallel sections. The openings in the division walls at the bottom of
the stove are graduated so as to give the greatest area where the force of the
currents are supposed to be weakest. L1 and L2 are what may be termed secondary
divisional walls and are carried up parallel to the principal divisional wall K³ K
and assist in supporting the roof of the stove which is constructed internally of
parallel arches extending from the outside wall E to the secondary divisional
walls L and L and from these to the principal divisional wall K³ K; and in-its
external construction the roof is dished sufficiently to throw off water but is flat
enough to be secured together by a system of girders or rolled joists M, as shown
in the figures 1 and 2. Cleaning doors N are provided in the usual positions on
and round the top of the stove to afford access to the interior of the stove for
cleaning scraping and examination, O being a gallery round the top of the stove to
facilitate access to the cleaning doors. Cleaning doors P are also placed in the
usual positions round the bottom of the stove to give access for cleaning in the
usual manner but in order to use these doors as ordinary cleaning doors or as self
cleaning doors at will, I construct these doors as shown in figures 3 and 4 with
a cover working on a hinge R at one part and secured to its seat by means of
screw latch S at the opposite part so that by screwing the handle of the latch
round, the bolt which is at liberty to turn on its other end, the cover Q can be

page_text: held tight lown to the seat T in the manner shown, a blow with a hammer will
kuock the latch or holder S to one side and release the cover Q, which flies open
from the pressure of blast and acts as a self cleaning door. In order to use the
door as an ordinary cleaning door the cover Q and the seat T when secured
together make up the cover for an ordinary cleaning door of which Ụ is the seat
or frame and to which the combined cover Q & T is secured by bolts or otherwise
in the usual manner, the object of this combined cleaning and self cleaning door
is to dispense with the necessity of having two sets of doors around the bottom of
one stove, one set to be used for cleaning the stove by ordinary appliances and the
other set to act as instantaneous valves.
Having now particularly described and ascertained the nature of my inven-
tion and the manner in which the same may be carried into effect, what
I claim is:-
Firstly-In stoves for heating the blast for blast furnaces, arranging within
one casing or outside wall a combustion chamber and a sectional regenerative
chamber substantially as and for the purpose hereinbefore described with reference
to figures 1 and 2 of the accompanying drawings.
Secondly:-In stoves for heating the blust for blast furnaces, the arrangement
of the vertical divisional walls extending from one point of intersection within the
stove to the outside wall whereby the combustion chamber, can be removed
without affecting the stability of the stove and the regenerator is so constructed
that the currents of the gases are diverted anglewise from section to section
substantially as and for the purpose herein before described.
Thirdly The arrangement of a system of arches forming the roof of a stove
substantially as and for the purpose hereinbefore described with reference to
figures 1 and 2 of the accompanying drawings.
Fourthly:-The external construction of the roof of a stove with a dished top
tied together by girders substantially as and for the purpose herein before described
with reference to figures 1 and 2 of the accompanying drawings.
Fifthly-The combined cleaning and self-cleaning door as described and
illustrated in figures 3 and 4 of the accompanying drawings.