Smoke Preventing Apparatus for Steam Boiler and other Furnaces.
Year: 1899

page_text: Date of Application, 5th Sept., 1899-Accepted, 28th Oct., 1899
COMPLETE SPECIFICATION.
Smoke Preventing Apparatus for Steam Boiler and other Furnaces.
I, ROBERT HENRY BURNS, of No. 112, Hale Avenue, Borough of Brooklyn,
City and State of New York, United States of America, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, reference being had to the accompanying drawings and to the letters
and figures marked thereon, that is to say:-
My invention relates to and has for its object, the improvement of fuel com-
bustion in furnace practice, more particularly as applied to steam generators
or boilers of either the fire or water-tube class. Certain of the improvements
consist in the construction, arrangement and adaptation of an air receiving
chamber to the front or secondary connections of the above mentioned class of
boilers, to receive, contain and steadily discharge a supply of air or of any
desired combustion assisting medium into the enclosing space, thence to, about
or through the lower tubes and into the combustion chamber or furnace. In
addition to this, it may be located in any un-exposed pocket, space or corner of
flue, connection or combustion chamber, the contents to pass out and mingle with
the fuel gases for additional combustion. Other improvements consist in the
suspension, hanging or swinging of said air or medium receiving chamber to
the doors or frames of the connections, flues or compartments of a fuel burning
furnace whereby a definite control of the inward movement of the air or medium,
a constant opportunity for examination and cleansing of the apparatus, also
when located in the front or chimney connection, a control of the outward move-
ment of the products of combustion, are all successfully attained. Other
provements consist in the special construction, arrangement and combination of
the several parts or portions comprising the apparatus as hereinafter shown,
described and claimed.
im-
In the accompanying drawings, Figure 1 represents a sectional view of a
horizontal fire-tube boiler and setting, supplied with an apparatus embodying
my improvements in its front connection, and a second one located in the cleaning
entrance to back connection. Figures 2 and 3 present detail views of an apparatus
embodying my improvements, the same being represented as rigidly attached to
a connection door by means of the admission inlet and assisting straps at top
and bottom. Figures 4 and 5 present the same as attached to one of the half-
doors of a square frame connection, the extension or hanging portion being set
at a slight angle to the perpendicular. Figures 6 and 7 represent the same
provided with a hinge or swing suspension strap attached to the frame or door
whereby its angle of suspension may be varied at will. Figures 8 and 9 represent
the same provided with a hinge strap or swing suspension from below, and varied
at will. Figures 10 and 11 show details of hinge, strap or swing suspension
attachment. Similar letters of reference designate like parts or portions in all
the figures.

page_text: In horizontal flue and tubular boilers, experience shows that the products of
combustion coming from the furnace, rise within the back connection and pass
through the upper rows of tubes or flues leaving the two or three lower rows
practically out of service. It is to take advantage of this feature that I place and
adjust the apparatus as described.
Referring to the drawings, A designates a chamber divided into manifold
portions or compartments B and C and the connecting or circulation compart-
ments D. E designates an inlet nozzle attachment by means of which the air
or combustion assisting medium enters naturally or by pressure, and by means
of which chamber A as a whole is supported or suspended from the framework or
door of the draft compartments or passages of the combustion chamber or furnace.
designates a door or framework to which the chamber A is attached. E¹
designates a cap or like means for closing inlet nozzle E or for controlling the
admission of combustion assisting medium to chamber A. When pressure of air
or medium is made use of, a valve, of any well known type or design, will be
necessary. In Figure 10, a slot e, is shown over which a screw cap may be wholly
or partially run to decrease more or less the inlet of air. C₁ designates exit
holes, perforations or slots in manifold C, through which the air or combustion
assisting medium is passed and scattered to mingle with the gases from the
fuel. The several circulation compartments D) are separated to form spaces
or passages G, through which the flue gases escaping to the chimney may pass,
coming in contact with all the heating surfaces of chamber A and raising the
temperature of the admitted air or combustion assisting medium before it can
pass out through holes C¹ for use. When chamber A is moved to the position as
shown in Figures 6 and 8, a partial obstruction of the front connection is effected
and the heated products of combustion coming from the upper tubes are forced,
more effectively about the exposed surfaces of chamber A. To guide and assist
the escaping combustion medium in its movement towards the lower boiler tubes
or flues, a plate I is preferably projected from the outlet manifold as shown in
Figures 1, 2, 4 and 8, the movement being shown by arrows in Figure 1. When
the apparatus is placed. in flue or back connection as shown also in Figure 1,
no guide plate I is necessary.
H designates a line, lever or arm by means of which chamber A is placed and
kept at any desired working angle, K designates a strap or clamp by means of
which chamber A. is held to its supporting wall; framework or door, and upon which
it may swing to any desired position. As detailed in Figures 10 and 11, an open-
ing is made in the manifold portion to connect with one in the inlet nozzle E and
the eye of clamp portion K so that an inlet of the medium is assured no matter
what the angle of chamber A may be.
In chamber A, as illustrated in Figures 2 and 3, 4 and 5, 6 and 7, the
circulation of the contained medium is from the manifold B to manifold C, taking
advantage of heating surface exposure of pipes or connections D; in Figures 8
and 9, it is into one portion of manifold C up through associated compartments D
to manifold compart B and down through other compartments D connecting with
the remaining portion of manifold C and thence out through exits 0, the
partition C dividing the manifold C as necessary and as shown in Figures 9
and 11. In such an arrangement the manifold C may be in two pieces as
shown in Figure 11 or the eye clamp K of nozzle E may be halved to effect the
assembling of the parts. By the use of a plurality of partitions C³, an increased
to and fro circulation of the medium may be effected.
When the suspension straps K of the shape shown in Figures 2 and 3 are
used, inlet E may continue free through frame or door without the binding nut J.
When they are abandoned and reliance placed upon the inlet nozzle attach-
ment E-K only, chamber A may be readily swung either upon the center of clamp
portion K, or upon that of nozzle E, adjustable at any angle and in any direction
of swing. A plurality of fixed inlet centers may be used as shown in Figure 5,
with a swing on the center of K or of manifold.

page_text: Having now particularly described and ascertained the nature of my
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1 In combination with the front connection, and the front connection ends
of the lower tubes of a horizontal tubular boiler, an inclosed chamber composed
of inlet and outlet manifold compartments and a plurality of connecting com-
partments, substantially as and for the purposes set forth.
2: In combination with the lower tubes and front connection doors of a
horizontal tubular boiler, an air receiving chamber composed of inlet and outlet
manifold compartments and a plurality of connecting circulation compartments,
and an inlet nozzle upon which the said air receiving chamber may be swung in
any direction and to any desired position substantially as and for the purposes
set forth.
3: In combination with the lower tubes and front connection doors of a
horizontal tubular boiler, an air receiving chamber composed of inlet and outlet
manifold compartments and a plurality of connecting circulation compartments,
a plurality of passages through which the escaping products of combustion pass
to reach the chimney, an inlet nozzle upon which the said air receiving chamber
may swing in any direction and to any desired position, and a guide plate to
control the movement of the admitted air or combustion assisting medium in
its passage to the lower boiler tubes substantially as set forth.
4: In combination with the draft passages or connections of a furnace, a
chamber composed of inlet and outlet manifold compartments and a plurality
of circulation compartments, and a guide plate to control the movement of the
air or combustion assisting medium after passing from its chamber, substantially
as and for the purposes set forth.
:
5 In combination with the draft passages or connections of a furnace, a
chamber composed of inlet and outlet manifold compartments and a plurality
of circulation compartments, and provided with a plurality of passages or openings
through which the escaping products of combustion may pass to reach the chimney,
and an adjusting arm, lever or line whereby the said chamber may be swung
to and secured in the desired position, substantially as and for the purposes
set forth.
6: In combination with the draft passages or connections of a furnace, a
chamber composed of inlet and outlet manifold compartments, a plurality of
circulation compartments, and a dividing plate or partition to effect an increased
circulation of the contained medium, substantially as and for the purposes set
forth
Dated this 5th day of September 1899.
ERNEST DE PASS,
Chartered Patent Agent, 78, Fleet Street, London, and
5A, Market Street, Nottingham,
Agent for the Applicant.