Improvements in Parts of Regenerative Gas Furnaces.
Year: 1889

page_text: PROVISIONAL SPECIFICATION.
Improvements in Parts of Regenerative Gas Furnaces.
I, JOHN BROMILOW of No. 9 Belle Vue Terrace, Gateshead on Tyne, Steel Works
Manager, do hereby declare the nature of this invention to be as follows:-
This invention has for its object Improvements in the parts of Regenerative gas
furnaces known as the reversing valves and Regenerators as used for raising high
temperatures generally required in metallurgical operations.
The first part of the invention relates to the reversing valves and consists in
providing a larger area for the outgoing products of combustion from the furnace to
the chimney, the said products having to pass through one part of the valve while the
incoming gases intended for combustion in the furnace pass through the other part of
the same set of valves.
The incoming gases consisting of atmospheric air pass through one set of reversing
valves and combustible gas through another set of reversing valves which are attached
to one and the same furnace. The incoming gases being comparatively cold and
the outgoing gases comparatively hot after having passed through a state of combustion
are consequently increased in volume..
This part of the improvement is to provide for the increased volume of the out-
going gases that has to pass through the bottom seats of both sets of reversing
valves.
The second part of the invention consists of an improved method of reversing the
valves by means of chains and pulleys worked by levers, the chains being attached
to a disc placed on the bottom lever and arranged so that by disconnecting the chain
on one side and reversing the lever in order to let the valve down on its seat the
communication between the furnace and the chimney can be entirely shut off. This
method of reversing and shutting off from chimney draught is a great advantage as
the heat can be retained in the furnace when necessary and prevents injury to the
draught of other furnaces when working into the same chimney.
The third part of the invention relates to an improvement in the regenerators and
consists in a series of contractions formed by placing the bricks composing them in
the regenerator chambers so as to have a much larger area of communication between
the furnace and the chimney through the bottom rows of bricks than there are through
the top rows of bricks in order to concentrate the waste heat from the furnace more
rapidly and to create a pressure immediately below and in the flues and ports
communicating with the furnace.
This is effected in the following manner :-
The bottom rows of bricks are placed wider apart than usual in order to provide
a large area for the expansion of the incoming gases as they are being heated while
passing up through them and also to prevent this part of the regenerator being
readily blocked up by scoria or slag from the structure above.
When the chambers are half filled dry brick walls are formed in order to cause a
contraction of area of communication between the rows of bricks so filled into the
regenerator chamber. The remaining rows of bricks forming the regenerators have
their spaces contracted in order to cause more friction between them and the incoming
gases. A few courses from the top a still further contraction is effected by thickening
the walls as already explained. By this method of forming the regenerators a
considerable pressure is created but if found advantageous artificial means can be
used to increase it the object in view being to use the gases on the principle of the
blowpipe with the consequent rapid developing of their combustion and a considerable
saving of fuel.
The whole of the imamanda
the
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page_text: connected with one apparatus called a Regenerative Gas Furnace as used for the
raising of high temperatures and are improvements on a Patent granted to me dated
the 17th March 1877 No. 1083.
COMPLETE SPECIFICATION.
Improvements in Parts of Regenerative Gas Furnaces.
I, JOHN BROMILOW of No. 9 Belle Vue Terrace Gateshead on Tyne, but now of
Pontymister near Newport Monmouthshire, Steel Works Manager, 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 has for its object improvements in the parts of Regenerative Gas
Furnaces known as the reversing valves and regenerators as used for raising high
temperatures generally required in metallurgical operations.
The first part of the invention relates to the reversing valves and consists in
providing a farger area for the outgoing products of combustion from the furnace
to the chimney the said products having to pass through one part of the valve while
the incoming gases intended for combustion in the furnace pass through the other
part of the same set of valves.
The incoming gases consisting of atmospheric air pass through one set of reversing
valves and combustible gas through another set of reversing valves which are
attached to one and the same furnace. The incoming gases being comparatively
cold and the outgoing gases comparatively hot, after having passed through a state of
combustion are consequently increased in volume.
This part of the improvement is to provide for the increased volume of the outgoing
gases that has to pass through the bottom seats of both sets of reversing valves.
The second part of the invention consists of an improved method of reversing
the valves by means of chains and pulleys worked by levers the chains being
attached to a disc placed on the botton lever and arranged so that by disconnecting
the chain on one side and reversing the lever in order to let the valve down on its
seat the communication between the furnace and the chimney can be entirely shut
off. This method of reversing and shutting off from chimney draught is a great
advantage as the heat can be retained in the furnace when necessary and prevents
injury to the draught of other furnaces when working into the same chimney.
The third part of the invention relates to an improvement in the regenerators and
consists in a series of contractions formed by placing the bricks composing them in
the regenerator chambers so as to have a much larger area of communication between
the furnace and the chimney through the bottom rows of bricks than there is through
the top rows of bricks in order to concentrate the waste heat from the furnace more
rapidly and to create a pressure immediately below and in the flues and ports com-
municating with the furnace.
This is effected in the following manner. The bottom rows of bricks are placed
wider apart than usual in order to provide a larger area for the expansion of the
incoming gases as they are being heated while passing up through them and aiso
to prevent this part of the regenerator being readily blocked up by scoriæ or slag
from the structure above.
When the chambers are half filled dry brick walls are formed in order to cause a
contraction of area of communication between the rows of bricks so filled into the
regenerator chamber. The remaining rows of bricks forming the regenerators have
their spaces contracted in order to cause more friction between them and the
incoming gases.
A few courses from the top a still further contraction is effected
by thickening the walls as already explained. By this method of forming the
regenerators a considerable pressure is created but if found advantageous artificial
means can be used to increase it, 'the object in view being to use the gases on the
-
.....

page_text: Figure 1 is a plan and Figure 2 a vertical section of the regenerative chambers
and flues and Figure 3 is a vertical section of my improved arrangements of reversing
valves for regenerative gas furnaces.
The same letters of reference indicate the same parts in all the Figures.
A A are the bottom seats of the valves through which the outgoing gases have
to pass.
BB are the top seats of the valves through which the incoming gases have to
pass, and shew a considerable contraction of area in comparison to the bottom
seats A. CC are the pulleys and chains connected to the disc D by means of which
the valves are reversed by throwing over the handle of the lever E in the opposite
direction.
FF are a pair of chambers, one air and one gas, previous to being filled with the
chequered brickwork H H.
GG are the contractions of the chequered brickwork forming the regenerators.
JJ are the port flues through which the gases have to pass previous to entering
the furnace above.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is,
1. The improvements in the reversing valves of regenerative gas furnaces whereby
a larger area is provided for the outgoing products of combustion from the furnace
to the chimney substantially as described and illustrated.
2. The improved method of reversing the valves by means of chains attached to a
lever and disc and passed over pulleys arranged so that the valves can be detached
in order to cut off the communication between the furnace and chimney when
necessary thus preventing the interference with any other furnace working into the
same stack, substantially as described and illustrated.
3. The improved regenerators placed in chambers large enough to allow them to be
contracted between the bottom rows and top rows of bricks placed immediately
below the flues, the contracted tops causing a more rapid concentration of the waste
heat, and the larger area of space at the bottom preventing the regenerators from
becoming choked with slag from the small area, thrown into the furnace, and the
melting away of the materials in the structure above, substantially as described and
illustrated.
Dated this 21st day of November 1889.