Improvements in Apparatus for Superheating Steam and Promoting Water Circulation in Steam Generators.
Year: 1898

page_text: Improvements in Apparatus for Superheating Steam and Promoting
Water Circulation in Steam Generators.
I, JAMES HERMANN ROSENTHAL, of 147, Queen Victoria Street, in the City of
London, Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in apparatus for superheating steam and
promoting water circulation in connection with steam generators of the shell type
such as Lancashire, Cornish or Scotch marine boilers.
The apparatus consists of pipes or boxes connected together in pairs by means of
tubes-preferably bent to "U" shape-one limb of each tube being connected to
one box and the other to the adjoining box. The boxes are conveniently fitted
vertically in the front part of the boiler with the tubes connecting them extending
into the side flues or other part exposed to the heat of the fire gases on their passage
from the furnace to the chimney. Steam from the boiler enters the first box, and
passing from the "U" shaped tubes enters the second box of each pair, and thence
passes to the steam main. A number of boxes and tubes as described may be used,
in order to increase the circulation of the steam passing through.
The superheater, when used in connection with Lancashire, Cornish, marine or
other shell boilers, may be used in the downtake, uptake, bottom or side flues.
By an arrangement of pipes and cocks the superheater is connected with the
water space of the boiler so as to form a flow and return system of water through
the superheater during the process of getting up steam, when the boiler is first
set to work. By this means a rapid circulation of the water is set up, which
enables steam to be raised much more quickly by utilising the superheater as
boiler heating surface, and by this means also the superheater is protected from
damage during the time when no steam is passing through it. By closing the
flow and return connection with the boiler and blowing out the water, steam
may be passed through the superheater through the steam connection, as before
described. The apparatus may thus be used either for promoting the water
circulation, or as a steam superheater.
The cocks for flushing and blowing off the superheater are connected with the
steam cocks in such a manner as to form, by means of a lever and worm wheel and
shafting, or like gear, a locking system which ensures the water being discharged
from the superheater before steam is passed from the boiler through the superheater
into the steam main.

page_text: Improvements in Apparatus for Superheating Steam and Promoting
Water Circulation in Steam Generators.
I, JAMES HERMANN ROSENTHAL, of 147, Queen Victoria Street, in the City of
London, Engineer, 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:-
This invention relates to improvements in apparatus for superheating steam and
promoting water circulation in connection with steam generators of the shell type
such as Lancashire, Cornish or Scotch marine boilers.
The invention is illustrated by the accompanying drawings, Figure 1 being a part
longitudinal vertical section, Figure 2 a plan partly in section, and Figure 3 a
transverse vertical section of the improved apparatus as applied to a Lancashire
boiler.
The apparatus consists of headers pipes or boxes A preferably of forged or drawn
steel connected together in pairs by means of tubes B preferably bent to "U" shape
and expanded into the headers-one limb of each tube being connected to one box
and the other to the adjoining Dox. The boxes A are conveniently fitted vertically
in the front or rear part of the boiler setting with the tubes B connecting them
extending into the side flues or other part exposed to the heat of the fire gases on
their passage along the heating surface of the boiler. Steam from the boiler D.enters
the first box A passing from the steam space of the boiler D to said box by way of
the pipe E; thence through the "U" shaped tubes to the second box A¹ of each
pair, and finally by the pipe F to the steam main G. A number of boxes and
tubes as described may be used, in order to increase the heating surface of the
superheater.
The superheater, when used in connection with Lancashire, Cornish, marine or
other shell boilers, may be placed in the downtake, uptake, bottom or side flues K as
shewn. By an arrangement of pipes H X and Z cocks I, J, and Y the superheater
is connected with the water space of the boiler D so as to form a flow and return
system of water through the boxes A, A¹, of the superheater during the process of
getting up steam, when the boiler is first set to work. By this means a rapid
circulation of the water is set up, which enables steam to be raised much more quickly
by utilizing the superheater as boiler heating surface, and by this means also the
superheater is protected from damage during the time when no steam is passing
through it. By closing the flow and return connection with the boiler and blowing
out the water at L, steam may be passed through the superheater through the
stean connection E, as before described. The apparatus may thus be used either
for promoting the water circulation, or as a steam superheater.
The cocks I, J, and Y for flushing and blowing off the superheater are connected
with the steam cocks in such a manner as to form, by means of a lever and worm
wheel and shafting, or like gear, a locking system which ensures the water being
discharged from the superheater before steam is passed from the boiler D through the
superheater into the steam main G.
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
1. The improved apparatus for superheating steam and promoting water circulation
in steam generators of the shell type, consisting of a series of bent tubes expanded
into headers or boxes preferably of forged or drawn steel, placed at the front or rear
portion of the boiler setting with the bent tubes extending into the side flues of the

page_text: furnace, the boxes being connected to the water space and to the steam space of the
boiler substantially as set forth.
2. Steam superheating apparatus constructed as hereinbefore described and placed
at the front or rear portion of the boiler setting so as to derive heat from the gases
whilst they are at a high temperature on their passage past the heating surfaces of
the boiler.
Dated this 3rd day of December 1898.
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow, Agent for the Applicant.