A New or Improved Means for Superheating Steam.
Year: 1897

page_text: Date of Application, 30th Oct., 1897-Accepted, 5th Feb., 1898
A New or Improved Means for Superheating Steam.
I, JAN GRUBINSKI, Engineer, of Bracka 3, Warsaw, do hereby declare the nature
of my said invention and in what manner the same is to be performed, to be. par-
ticularly described and ascertained in and by the following statement:-
My invention relates to a novel construction in a device for superheating steam,
the object being to provide a device of this kind in which the steam is brought
into contact with the superheating surfaces in a finely divided state, and flows in
a direction opposite to the flow of the heated gases; and consists in the features
of construction and combinations of parts hereinafter fully described and claimed.
In the accompanying drawings illustrating my invention:-
Figure 1 is a vertical longitudinal section of a device for superheating steam
constructed in accordance with my invention, taken on the line 1-1 of Fig. 2,
Fig. 2 is a vertical transverse section of the same on the line 2-2 of Fig. 1.
Fig. 3. is a vertical longitudinal section on the line 3-3 of Fig. 4, showing a
slightly modified form of construction. Fig. 4 is a vertical transverse section on
the line 44 of Fig. 3.
Referring to the drawings, A, B and C, indicate three chambers into which
my device is divided and through which the steam passes from the inlet pipe a
to the outlet pipe d. Flues pass through all of said chambers A B and C,
through which the products of combustion pass in the direction indicated by the
arrows in Figs. 1 and 3. Pipes c of greater diameter than the flues b, and of less
length than the combined width of two of the chambers A B and C, are mounted
in the partitions between the chambers and surrounding the flues b, so that the
small annular spaces between the flues and pipes c, afford the only communica-
tion between the chambers. Some of the pipes c are interposed between the cham-
bers A and B, and others between the chambers B and C, and are so arranged as
to receive and deliver the steam at points farthest from the dividing wall between
the two chambers.
The steam enters through the pipe a and passes from chamber A into chamber B
through annular spaces between the pipes and flues b, and likewise from cham-
ber B to chamber C, so that the general direction of its flow is opposite to that of
the heated gases passing through the flues b. By means of the pipes c the steam
is finely divided, that is, small volumes thereof are brought into contact with
large heating surfaces, and it is thus quickly superheated to an intense degree.
Its direction of flow with relation to the hot gases is also such that the steam just
entering first encounters the least heated portions of the flues, as will be obvious,
and, as it is gradually superheated, encounters the more intensely heated portions
of the flues.
In Figures 3 and 4 I have shown a modified form of construction in which
only two chambers are employed, the connection between the same being effected
in the same manner as between two of the chambers of the device shown in Figures 1
and 2. except that a pipe c surrounds every flue B.

page_text: 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. A device of the kind specified comprising a casing intersected by flues and
divided into a plurality of compartments, and means for establishing communica-
tion between said compartments comprising tubes of larger diameter than said
flues, surrounding the latter, and passing through said partitions between said
compartments, whereby the steam is caused to pass through the annular passages
between said flues and said tubes substantially as described.
2. A device of the kind specified comprising a casing intersected by flues and
divided into a plurality of compartments, and means for establishing communica-
tion between said compartments comprising tubes of larger diameter than said
flues and of slightly less length than the combined length of two of said compart-
ments, surrounding said flues and passing through said partitions between said
compartments, whereby said steam is caused to pass through the annular passages
between said flues and said tubes substantially as described.
3. The improved means for superheating steam substantially as described and
illustrated by the drawings.
GEORGE DOWNING & SONS,
S, Quality Court, London, W.C., Agents.