AN IMPROVED MODE OF HEATING AND APPLYING THE HEAT OF REGENERATIVE STOVES TO STEAM BOILERS
Year: 1884

page_text: I, JOHN TATE, of Solway Iron Works, Maryport, in the county of Cumberland,
Blast Furnace Manager, do hereby declare the nature of my said Invention for
"AN IMPROVED MODE OF HEATING AND APPLYING THE HEAT OF REGENERATIVE
STOVES TO STEAM BOILERS," to be as follows:-
My Invention has for its object the heating and applying the heat of hot blast
stoves for generating steam in steam boilers.
I connect to a steam generator two or more of the stoves commonly used in iron-
works for heating the blast; and I fire the stoves alternately by the use of solid,
liquid, or gaseous fuel.
For burning solid fuel, I employ a series of two or more fire grates or furnaces
placed in the combustion chamber of the stove, whereby the smoke alternately
passes off from one grate, and over the red-hot fuel of the other.
When burning liquid fuel, I inject air into the combustion chamber along with
the fuel Gaseous fuel firing I do in the usual way.
The products of combustion are led away during the firing by the usual chimney.
After having fired for any specified time, or until such time as the fuel has parted
with all its heat to the brickwork of the stove, I cease firing, and cut off the stove
from direct communication with the chimney by closing a valve or damper. I at
the same time, by opening another valve or damper, place the stove in direct
communication with the boiler flue or flues.
The chimney to which the boiler is connected creates a draught of air through
the heated stove, and the air in passing through the brickwork of the stove is
heated, as it would be in any ordinary regenerating chamber, to a temperature
approximating to 1800° Fahrenheit. The beated air which is carried by the
draught parts with its heat to the water in the boiler, and steam is thereby
generated. While one stove is parting with its heat in this manner another stove
8 being fired, or several other stoves are being fired; and by the time the beat of
he brickwork in the first stove has been exhausted, or applied as may be desirable,
n heating the boiler, the firing of the second stove has ceased, and it is placed in
irect communication with the boiler flue while the first stove is again fired.
Dated this Second day of Wahman 100%

page_text: I, JOHN TATE, of Solway Iron Works, Maryport, in the County of Cumberland,
Blast Furnace Manager, do hereby declare the nature of my said Invention for
"
AN IMPROVED MODE OF HEATING AND APPLYING THE HEAT OF REGENERATIVE
STOVES TO STEAM BOILERS," and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement :-
My Invention has for its object the heating and applying the heat of hot blast
stoves for generating steam in steam boilers.
I connect to a steam generator two or more of the stoves commonly used in iron-
works for heating the blast; and I fire the stoves alternately by the use of solid,
liquid, or gaseous fuel.
For burning solid fuel, I employ a series of two or more fire grates or furnaces
placed in the combustion chamber of the stove, whereby the smoke alternately
passes off from one grate, and over the red hot fuel of the other.
When burning liquid fuel I inject air or steam or both into the combustion
chamber along with the fuel. Gaseous fuel firing I do in the usual way.
The products of combustion are led away during the firing by the usual chimney.
After having fired for any specified time, or until such time as the fuel has parted
with all or the greater part of its heat to the brickwork of the stove, I cease firing,
and cut off the stove from direct communication with the chimney by closing a
valve or damper. I at the same time, by opening another valve or damper, place
the stove in direct communication with the boiler flue or flues.
The chimney to which the boiler is connected creates a draught of air through
the heated stove, and the air in passing through the brick work of the stove is
beated as it would be in any ordinary regenerating chamber to a temperature
approximating 1800° Fahrenheit. The heated air which is carried by the draught
parts with its heat to the water in the boiler, and steam is thereby generated.
While one stove is parting with its heat in this manner, another stove is being
fired, or several other stoves are being fired; and by the time the heat of the
brickwork in the first stove has been exhausted or applied as may be desirable in
heating the boiler, the firing of the second stove has ceased, and it is placed in
direct communication with the boiler flue, while the first stove is again fired.
The accompanying Drawings illustrate a suitable arrangement of apparatus for
use in carrying out my Invention, and as adapted for gas firing.
--
Figure 1 is an elevation, Figure 2 is a vertical section, and Figures 3 and 4 are
horizontal sections on the lines 1 1 and 2 - 2 respectively of a regenerative blast
or air stove fitted in connection with a range of steam boilers. Figure 5 is a
vertical section of the same at right angles to Figure 2. Figures 6, 7, 8, and 9 are
detailed views of the brickwork setting of the stove. In firing by means of gas,
the furnace gases or other combustible gases are led from the main gas flue A
through an inlet pipe B fitted with a valve B' to the central chamber C of the
stove, thence pass by ports c in the crown C¹ to a combustion chamber C' where
combustion results from the union of the gases with heated air which enters by
ports & from air inlets D provided with regulating valves D¹. The hot products of
combustion pass up through the combustion chamber C and over the walls C³
through the brickwork of the regenerative chambers C+ through the ports E in the
lower chamber C which are provided with valves E' to the outlet pipe F leading
to the chimney flue J, the valves F¹ and F' being then open. When the firing has
been continued for such a length of time that the brickwork of the regenerative

page_text: chambers C has been heated to the desired degree, the inlet valve B¹ and outlet
valve F' are closed, and an air inlet valve G is opened. Air then enters and travels
in the reverse direction to that of the products of combustion through the
chamber C, regenerators C, and combustion chamber C³ to a hot air duct H
provided with a valve H¹ which remained closed during the firing, but which is
now opened to permit the passage of the air heated by the regenerators, to the
flues I of a boiler 1' through which it is exhausted or forced or drawn by the
draught of the chimney, the boiler flues being connected thereto. The heat which
is absorbed by the air in passing through the regenerators, is parted with to the
boiler, and serves to raise steam therein, the boiler flues being if necessary partially
filled with bricks or other heat-absorbing and retaining material. In drawing the
air through the regenerators C4, one only may be used at a time by closing one of
the valves El while the other is open.
During the time that air is being heated in one of the regenerative stoves, an
adjacent one is being fired, and vice versa, and by this means the boiler may be
uniformly acted on by hot air heated in the stoves. Before recommencing firing of
the stove, the valve F¹ is closed for a short interval to confine the air within the
regenerators, and permit of its expansion, and the gas outlet valve F" is opened,
the valve F1 is simultaneously opened with it, whereby a sudden rush of the
expanded air occurs, and soot or dust adhering to the brickwork of the regenerators
is disengaged, and carried off with the air to the chimney.
By the employment of the mode described of heating steam boilers, pure hot air
only is brought into contact with the heating surfaces, and a greater heating effect
is obtained than when, by direct firing, the heating surfaces are coated with soot
and other non-conducting matter deposited by the flame of combustion.
In firing by means of solid or liquid fuel, a fire grate or similar means of carrying
the fuel may be fitted in the chamber C of the stove. Any other well known form
of hot blast or regenerative stove may be employed in lieu of that illustrated in the
drawings.
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,
First. The improved mode herein described of applying the heat of regenerative
stoves for generating steam, such mode consisting in alternately firing such stoves
by means of gaseous, solid, or liquid fuel, and drawing or passing air through
them and through the flues of the steam generator, substantially as set forth.
Second. The employment of regenerative stoves in the improved manner herein
described for heating and generating steam in steam boilers.
Dated this Thintre first do of October 1881.