A New or Improved Smoke-consuming Firing Device for Boilers.
Year: 1889

page_text: Date of Application, 2nd Jan., 1889
Complete Specification Left, 20th July, 1889-Accepted, 7th Dec., 1889
PROVISIONAL SPECIFICATION.
A New or Improved Smoke-consuming Firing Device for Boilers.
i, ERNST BERNHARD MÜLLER of 29 Mathesstrasse, Chemnitz, in the Empire of
Germany, Merchant, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved smoke-consuming firing device for boilers
essentially consisting of a furnace or a series of furnaces arranged circularly or other-
wise beside each other, each furnace being laid out with suitable glowing bodies so
placed at intervals on and beside one another as to leave sufficient spaces for the
combustion of the fuel fed through convenient openings provided at the top.
The doors of the furnaces have perforations adjustable by means of suitable slides.
Each furnace has at the bottom a smoke passage adapted to be opened or closed by
valve and terminating in a common smoke canal leading into the Hue.
One or more furnaces may be disengaged by means of the slides according to
requirement.
This out of 1000
HUELSER & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
A New or Improved Smoke-consuming Firing Device for Boilers.
I, ERNST BERNHARD MÜLLER, of Chemnitz, in the Kingdom of Saxony and German
Empire, do hereby declare the nature of this invention and the manner in which
the same is to be performed to be particularly described and ascertained in and by
the following statement :-
This invention relates to furnaces for various purposes and is designed to effect the
entire combustion of carbon which at present is wasted in the form of smoke, and
thus to effect greater economy in heating and to avoid contamination of the
atmosphere.
In order that my invention may be the better understood, I now proceed to describe
the same in relation to the accompanying drawings, reference being had to the letters
and figures marked thereon.
Figure 1 is a plan of the furnaces.
Figure 2 is a sectional front view, and
Figure 3 is a side view shown in longitudinal section.
The arrangement shown in the drawings contains six furnaces, but I may use only
one or any other number, and they may be arranged around the boiler in oval or
circular or other suitable form.
All furnace spaces are partially filled with porous fire brick in the form of bricks X,
placed beside and above one another and at suitable distances from one another, so
that the flames may pass or envelope and heat them to a high degree. When the
smoke developed by the fuel comes in contact with these glowing fire bricks X and
with the atmospheric air introduced through the furnace doors or suitable openings in
the same the fine carbon particles constituting the smoke are rendered incandescent
and are partly consumed, while the products of combustion such as carbonic acid and
carbonic oxide enter the chimney without any smoke.
Each of the furnaces 1 to 6 is supplied with a furnace door a¹ etc., and smoke tubes
or channels & etc., which can be regulated by the slide further with valves c¹ etc.
fis the common flue which connects the several furnaces to the chimney. The slide /

page_text: allows of each furnace being connected to or disconnected from each other at
pleasure.
The working of this arrangement is effected as follows :—
The furnaces are started in the usual manner and when the slide is placed as in
the drawings, i.e. between the fire boxes 1 and 6 the door a' and the valve c' are left
open to produce rapid circulation of air, until the fire bricks in the furnaces are
brought to a glowing heat. The valves c¹ to regulate the draft of gases in the
sinoke channels 1 to 6 while the slide b separates or connects respectively the fire
_places 1 to 6 according into which recess the slide is inserted. Then the door a¹ is
closed and the firing is continued through the openings d arranged on the top and
which may be closed hermetically, the air being admitted through openings of any
suitable description arranged on the fire doors. The fuel of not more than nut size is
fed among the glowing fire bricks in small quantities and at short intervals through
the tubes d. When the fire bricks in one furnace have been brought to white heat,
the next furnace is proceeded with and so on until all are in working order.
It is evident that as a greater or less number of furnaces may be worked ai
pleasure, this arrangement is more economical than the ordinary fire grate arrange-
ment when the whole grate must be covered with fuel, thus rendering regulation more
difficult.
The combustion of the fuel which consists of coal of any kind is effected completely
without smoke and without the formation of cinders, only light ashes being formed
which are taken to the common flue where they can be easily removed.
When the fire bricks of the furnaces 4, 5 etc. have been brought to a strong glowing
heat, the fires in 1, 2, and 3 may be slackened while the admission of air through the
respective furnace doors or openings in the said furnace doors is continued, the air
arriving at the fire place strongly heated. When the fire bricks in the discontinued
furnace or furnaces have become cold the air is allowed to enter through the next
furnace door, while such discontinued furnaces are disconnected from the main
smoke flue and may thus be easily cleaned together with the channel of flue f
When it is desired to re-start the disconnected furnace 1, the valve b, which is
now inserted between 1 and 6 is taken out and inserted between 1 and 2. the valve c¹
and the furnace door a¹ are closed, while the valve c³ is opened when all furnaces will
be again in working order.
In the above described manner the other furnaces 2, 3, 4 etc. may also be
discontinued by opening on the adjoining furnaces 3, 4, 5 etc., the furnace
door as a a³ etc.
In restarting the valve b. is advanced one or more furnaces (according to the
number discontinued) between the furnaces 2 and 3, 3 and 4 4 and 5 ele.
The open furnace doors a² a³ a &c. and the valves of the discontinued
furnaces 2, 3, 4, etc. are closed, except the door through which air is admitted
to the fire. At the same time the valve in the smoke flue nearest to the valve or
slide must be closed.
According to the size of the arrangement such change in working the furnaces may
be effected every 10 to 15 hours.
When the working is to be interrupted the open furnace door through which air is
admitted is closed, as well as the valve of the open smoke flue, which is connected to
the furnace at work and the chimney, the fire then does not burn further while the
heat is maintained for days..
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. In smoke consuming furnaces the arrangement of partially filling the fire space
or spaces in any suitable manner with fire bricks and the feeding of the furnaces with
fuel through openings arranged on the upper side of the furnace, which may be.
closed hermetically, substantially as described and shown in the drawings.

page_text: 2nd. In smoke consuming furnaces arranged as claimed in claim 1 the arrangement
of a number of fire or air-admission doors a' etc. valves c' etc., and slide 6 in such a
manner that one or more of the furnaces may be used, substantially as described and
shown in the drawings.
Dated this 10th day of In 1900
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant.