Improvements in Means for Heating the Water in Steam Generators.
Year: 1898

page_text: Date of Application, 29th Apr., 1898-Accepted, 6th Aug., 1898
COMPLETE SPECIFICATION.
Improvements in Means for Heating the Water in Steam Generators.
f
I, OSCAR BRUNLER, of Eilenburg, Germany, Maker of all kinds of Machinery,
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;
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My invention relates to the firing of steamboilers and more especially to steam-
boilers with an internal furnace, where the flame is kept in operation within the
water and in the steam dome.
In the accompanying sheet of drawings
Fig. 1 shows a vertical section through a steamboiler, provided with my new
improved internal furnace and
Fig. 2 is a horizontal section on the line x-x of Fig. 1.
Compressed air mixed with gaseous, liquid or powdered fuel is introduced
through the pipe a into the burner A. The pressure, with which this combustible
mixture is pressed in, must be higher than the internal steam pressure plus the
pressure of the column of water at the mouth of the furnace or burner A.
Within the burner A, which in shape somewhat resembles a diving bell, the com-
bustible mixture is ignited and burns with such violent force as to drive the water
away from the mouth c of the burner, as is shown in Fig. 1.
A cylindrical mantle d is provided in the burner A, having a number of
passages for the admission of the combustible mixture. This cylinder d, which
however is not absolutely necessary, very soon becomes red hot and the blown-in
liquid fuel quickly evaporates and is then ignited.
Part of the burning gases can be conducted by means of the standpipe g into the
steam dome.
The igniting device or auxiliary burner which can also be made use of to heat
the burner A, is shown in Fig. 2.
The burner h of similar construction to the main burner A in the beginning of
the heating operation is heated from without by means of a lamp, the flame of
which surrounds the said burner h.
This lamp is removed after the main burner has been heated to the extent of
maintaining ignition for itself. In the same manner the auxiliary igniting tube /
is heated at first by a lamp, which is extinguished as soon as ignition takes place
within the tube l.
The combustible mixture is pressed in through pipe i. The cock k is opened a
little, when part of the gas, formed in the burner h will pass through the hot tube 1,
where ignition will take place, and will then escape through the cock k. As soon
as a flame shoots out of the cock, the latter is to be closed and the burner h now
performs its function. The burning gases pass through pipe m into the main
burner A and heat the latter until constant gasification and ignition is established
within it

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
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1. In an internal furnace for steamboilers in combination the main burner A,
the cylindrical mantle d, being provided with passages f and the supply pipe a,
as set forth.
2. In an internal furnace for steamboilers in combination the main burner A,
the standpipe g, the cylindrical mantle d, being provided with passages f and the
supply pipe a, as specified.
3. In an internal furnace for steamboilers in combination the main burner A,
the standpipe g, the cylindrical mantle d, being provided with passages f, the
supply pipe a, the auxiliary burner h, the supply pipe and the pipe m, connecting
the said auxiliary burner with the main burner, as and for the purpose specified.
4. In an internal furnace for steamboilers in combination the main burner A,
the standpipe g, the cylindrical mantle d, being provided with passages f, the
supply pipe a, the auxiliary burner h, the supply pipe i, the pipe m, connecting
the said auxiliary burner with the main burner, the auxiliary igniting tube 7 and
the cock k as and for the purpose specified.
Dated this First day of April 1898.