Improvements in the Method of and Apparatus for Effecting or Increasing the Combustion of Smoke in Steam-boiler and other Furnaces, and in the Utilization and Transmission of Heat Pro- duced therein, and for Economizing Fuel and Improving the Draught.
Year: 1890

page_text: Date of Application, 10th Apr., 1890
Complete Specification Left, 9th Jan., 1891-Accepted, 14th Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Method of and Apparatus for Effecting or
Increasing the Combustion of Smoke in Steam-boiler and other
Furnaces, and in the Utilization and Transmission of Heat Pro-
duced therein, and for Economizing Fuel and Improving the
Draught.
We, WILLIAM ACKROYD, Justice of the Peace, of The Wheatleys, Birkenshaw,
Worsted Spinner, THOMAS HENRY ACKROYD, of Oakroyd Hall, Birkenshaw,
Worsted Spinner, and JOHN WILLOUGHBY, of the firm of Willoughby and Co., of
Gomersall, Engineer, all in the County of York, do hereby declare the nature of
this invention to be as follows:-
--
Our invention has reference to certain improvements connected with the
combustion of smoke in steam boiler and other furnaces, and with the utilization
and transmission of heat or hot air produced therein, for drying purposes, warming
buildings, and for other suitable purposes where heat is required without the direct
action of fire, also for economizing fuel, and improving the draught. And our said
improvements consist in the following, namely:
In employing forced draught, produced by any suitable form of injector, either
by steam, compressed air, fans, gas blowers, or otherwise. In a closed furnace,
and providing for the admission of hot air at the dead plate of the boiler or
through or over the door, or at any other suitable position under or over such
dead plate. We also make provision for the admission of the whole or part of
the hot air under the grate bars.
The whole or part of the furnace bottom may be of firebrick or other non-heat-
conducting substance or material, and may be constructed either of a flat or other
special form, but preferably of a curved form, so arranged as to deflect the heat
and flames against the flue plates.
For the purpose of collecting the hot air from the chimney or uptake we
provide pipes, receivers, or any other suitable arrangement, or suitable hollow
flue midfeathers, in combination with the injectors as aforesaid: or such flue
midfeathers and injectors may be provided between the boiler flues.
Further, our said improvements are applicable for utilizing the waste heat of
annealing pans, and the various furnaces required in the manufacture of iron,
steel, or other metals; also for other furnaces used in any manufacture whatsoever.
Dated this 8th day of April 1890.
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds, Agent for the Applicants.

page_text: vation of Stationary boner with our improYE
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Fig. 2, is a longitudinal section of Fig. 1, showing air taken through the chimney
shaft.
Fig. 3, is a plan of Fig. 1, showing air tube taken through the bottom flue to the
other end of boiler.
Fig. 4, shows front elevation of apparatus applied to a marine boiler.
Fig. 5, shows application of tube E to destructor.
A is the boiler, B are the flues, Care the doors of the furnaces, which are
provided with openings D, from the tubes E, the tubes E form one hinge or pivot
of the door, at F, and the centre screw G, and bracket G¹ forming the other hinge
or pivot.
The tube E is continued and passes along, preferably up the bottom flue of the
boiler to the back as shown at Fig. 3, or to the chimney shaft J, and part way up
the same as shown at Fig. 2, or through internal flues, tubes or shells of boilers in
all cases it terminates in an open or trumpet mouth K, into which passes a nozzle
or pipe end L, this pipe also follows the course of the tube E, down the shaft J,
and along the bottom or other flue H close to the boiler.
The pipe L then passes to the boiler at M, by which it is charged with steam,
this steam is highly superheated in its passage along the pipe in the hot flues to the
back of the boiler or chimney shaft.
The tube E is provided with a cover P for cleaning purposes, it also has an
opening such as R for the insertion of testing apparatus, to show the heat of the
steam and air before it passes to the fire of the furnace.
Each pipe L is provided with a valve N which when turned on, allows the steam
to pass forwards along the pipe to the mouth or opening K in the tube E, which it
enters in a dry state and greatly increases the draught and heat in the air tube E
and passes with the hot air to the door of the furnace, where it is delivered upon
the burning fuel, and mixes with the gases or products of combustion, igniting and
increasing such combustion, and consuming or rendering invisible the smoke passing
to the chimney shaft.
The steam may be introduced into the hot air tubes at any point within the
chimney shaft or flues and one or more injectors used.
Dampers or valves are provided in the tubes to regulate the amount of hot air
admitted to the furnace as desired.

page_text: The valves are preferably opened after each firing of their respective flues for a
short time, and may be operated by hand or by automatic mechanism of any kind,
operated by the opening and closing of the doors for stoking purposes.
In applying our apparatus to marine boilers see Fig. 4 the tubes E pass up within
the front of the boiler to the uptake or chimney, the steam pipe also passing up the
chimney or uptake.
Our apparatus can also be applied to the furnaces of all classes of boilers, and for
more thoroughly utilizing the waste heat from annealing pans, and all classes of
furnaces and destructors.
The whole or part of The hot air and superheated steam may be is admitted at any
other part of the furnace desirable but we prefer it at the door or dead plate, in
front of the fire.
The heated air may also be carried away for heating buildings, steamboats,
machinery, for evaporating or for other suitable purposes.
Blasts by means of fans, compressed air or other blowers may be used distinctly
or separately in addition to steam jets.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is -
1. Heating air taken from the chimney shaft or other convenient position and
forcing it by means of superheated steam (with or without fans, blowers, or com-
pressed air) down the shaft through the bottom or other heated flues, tubes or the
like then passing it through the doors of furnaces of various kinds as and for the
purposes such as shown and described.
2. Heating air taken from the chimney shaft or other convenient position and
forcing it by means of superheated steam (with or without fans, blowers, or-com-
pressed air) down the shaft, through the bottom or other heated flues, tubes or the
like and passing it to buildings for heating, drying or other purposes such as shown
and described.
2. The construction of tubes E having doors P and openings R as and for the
purposes such as shown and described.
4. 3. The general construction and arrangement of apparatus as and for the
purposes such as shown and described.
Dated this 1st day of January 1891.
JOHN E. WALSH,
Royal Exchange Chambers, Leeds, Agent for the Applicants.