The Generation of Gaseous Fuel and the Combustion thereof in Steam Generator Furnaces
Year: 1888

page_text: Date of Application, 14th July, 1888
Complete Specification Left, 15th Apr., 1889-Accepted, 22nd June, 1889
PROVISIONAL SPECIFICATION.
The Generation of Gaseous Fuel and the Combustion thereof in
Steam Generator Furnaces.
THE GASEOUS AND LIQUID FUEL SUPPLY COMPANY Limited 25 Market. Street
Manchester and BENJAMIN HOWARTH THWAITE of 37 Victoria Street Liverpool
Civil Engineer do hereby declare the nature of this invention to be as follows:-
This Invention relates to improvements in the Generation of Gaseous Fuel and
the combustion thereof, in Steam Generator Furnaces, by the application of which
part of the advantages derivable from the use of gaseous fuel can be realised without
the corresponding disadvantage of loss of heat by radiation from gas generator
vessel sides, and loss of sensible heat of combustible gases, and the extra expense
involved in a separate and independent erection.
Briefly described this invention is as follows.
In order to obtain a depth of fuel in an ordinary steam generator furnace flue necessary
to effect the chemical action involved in the proper production of combustible gases
or gaseous fuel-
.
The ordinary firebars are either lowered very considerably below the centre of
furnace or they are inclined towards the bridge, end, but we prefer that the fire-
bars be removed altogether, the fuel' simply resting on a floor of refractory hollow.
bricks or pipes laid on bottom of furnace flue.
Below the ordinary door frame of Boiler furnace, we provide, attached to dead
plate, another door frame to which we hinge another door for clinkering and air
distributing purposes, faced next the fuel with a refractory block placed a few
inches away from front plate of this door; the air distributing space intervening,
forms a receptacle for the distribution of the air blast, which is induced or forced
therein by means of one or more steam jets.
Conical perforators or holes provided in the refractory block, distribute the air
blast and steam to the mass of fuel and this being kept at a considerable depth, if.
necessary up to the underside of upper part of flue. The air and steam in passing
through the fuel acts on it according to the formula 2 N, O + 20 = 8N + CỜ
20 8 N + 2 CO.
=
The steam acts on the fuel according to the following reaction-2 H₂ O + 2 C
4 H +CO, + C₁ = 4 H 2 CO; These combustible gases resulting from
reactions, meet an independent and pure air supply with which they are intimately
mixed at the bridge. This air. (per se) supply is provided by a fan or blower and
it is led to the point of combustion in any of the following ways: The air may be
led, distributed, or conveyed by metallic or earthenware pipes through the central
flue of steam generator setting, and along the two side flues thereof and then be
distributed to a collecting box at the front end of steam generator and attached to
or connected to the hollow bricks or pipes at the bottom of furnace flue, through
which the air blast. to support the combustion of the gaseous fuel passes to the
bridge. The upper part of bridge is constructed of a series of ports the division
walls of which are carried up to the underside of flue plate; at the back of the
bridge an additional wall is built with a space intervening into which the air blast
supply is distributed and through which it ascends to meet the currents of gaseous
fuel. The upper part of air space may be so contrived that it can be stopped up by
lumps of the fuel.
At the distance of about 5 feet from the front end of furnace flue the latter is
lined with a specially shaped refractory lining.
The segments are perforated in the middle and have flanges at their sides to
provide a greater joint surface. These linings become heated to incandescense and
.

page_text: :
COMPLETE SPECIFICATION.
The Generation of Gaseous Fuel and the Combustion thereof in
Steam Generator Furnaces.
THE GASEOUS AND LIQUID FUEL SUPPLY COMPANY Limited 25 Market Street
Manchester and BENJAMIN HOWARTH THWAITE 37 Victoria Street Liverpool Civil
Engineer 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 improvements in the generation of gaseous fuel and the
combustion thereof in steam generator furnaces by the application of which part of
the advantages derivable from the use of gaseous fuel can be realised without the
corresponding disadvantage of loss of heat of combustible gases and the extra
expense involved in a separate and independent erection.
Briefly described this invention is as follows
In order to obtain a depth of fuel in an ordinary steam generator furnace flue
necessary to effect the chemical action involved in the proper production of
combustible gases-
The ordinary firebars are either lowered very considerably below the centre
of furnace, or they are inclined towards the bridge end, but we prefer that the
firebars be removed altogether the fuel simply resting on a floor of refractory hollow
bricks or pipes laid on bottom of furnace flue.
Below the ordinary door frame of boiler, we provide, attached to dead plate,
another door frame to which we hinge another door for clinkering and steam and
air blast distributing purposes, faced next the fuel with a refractory block placed a
few inches away from front plate of this door, the air distributing space intervening,
forming a receptacle for the distribution of the air blast which is induced or forced
therein by means of one or more steam jets.
Conical perforations or holes provided in the refractory block, distribute the air
blast and steam to the mass of fire.and this being kept at a considerable depth if
necessary up to the under side or upper part of flue. The air and steam in passing
through the fuel act on it according to the formula 2 NOC 8 N + CO₂
+C 8 N 2 CO.
-
-
=
=
The steam acts on the fuel according to the following reaction, 2 H, O + C
4 H + CO, + C = 4 H + 2 CƠ. These combustible gases resulting from
reactions meet an independent and pure air supply with which they are intimately
mixed at the bridge. This air (per se) supply, is provided by a fan or blower and
it is led to the point of combustion in any of the following ways: The air may be
led, distributed, or conveyed by metallic or earthenware pipes through the central
flue of steam generator setting, and along the two side flues thereof and there
distributed to a collecting chamber at the front end of steam generator, and attached
to or connected to the hollow bricks or pipes at the bottom of furnace flue, through
which the air blast to support the combustion of the gaseous fuel passes to the bridge.
The upper part of bridge is constructed of a series of ports, the division walls of
which are carried up to the underside of flue plate, at the back of the bridge an
additional wall is built with a space intervening, into which the air blast supply is
distributed and through which it ascends to meet the current of gaseous fuel. The
upper part of air space may be so contrived that it cannot be stopped up by lumps
of the fuel.
At the distance of about 5 feet from the front end of furnace flue the latter is
lined with a specially shaped refractory lining. The segments are perforated in
the middle and have flanges at their sides to provide a greater joint service. These
linings become heated to incandescense and prevent the deposition of carbon from the
volatile hydrocarbons on to the flue plates. The perforations allow of direct

page_text: Fourth. The method of utilisation of heat produced by the combustion of gaseous
fuel under forced pressure, substantially as herein described.
Dated this 13th day of April 1889.
P TT TEA T
THE GASEOUS & LIQUID FUEL SUPPLY COY., LIMITED,
Per David H. Noar, Secretary.