Improvements in Sectional Steam Generators.
Year: 1892

page_text: Date of Application, 20th Jan., 1892-Accepted, 23rd Apr., 1892
COMPLETE SPECIFICATION.
Improvements in Sectional Steam Generators.
I, JAMES HERMANN ROSENTHAL, Engineer, of 114 Newgate Street in the City
of London 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 which relates to sectional steam generators has for its object the
provision of means for intercepting and removing sludge or impurities from the
water in the inclined tubes in which the water circulates and for providing for
the scouring or sludging of individual rows of these tubes in order to prevent
incrustation.
In the accompanying drawings
Figure is a sectional elevation shewing part of the circulating tubes of a steam
generator of the Babcock & Wilcox type, and Figure 2 is a cross section of the
same.
The circulating tubes A. are connected to headers B at rear and in front in the
usual way and the ordinary mud drum C is connected to the rear header. The
lower row or rows of tubes A instead of extending from the front to the rear
headers are under the invention divided in their length and a cross box or drum D
is interposed by preference behind one of the flame bridges F. These tubes at A'
extend from the rear headers to the said cross box or drum, to which they are
attached by expanding and at A² they extend from the front headers to the front
end of said drum.
The cross box or drum D which may be of any cross section constitutes an
interceptor for such impurities as do not fall into the mud drumm C but are carried
along with the water circulating in these tubes the impurities being deposited as
sludge in the bottom of the drum D. To the bottom or end of the drum D a blow
off pipe or pipes E is or are connected the said pipe being carried to any convenient
point and fitted with a cock by opening which the sludge may be blown off to clear
the deposit in the drum D, the tubes subject to the fiercest heat of the fire being
thus kept free from liability to incrustation.
As shewn at Figure 3, the cross box or drum D may be interposed in the length
of the circulating tubes A at a point behind the bridge G of the boiler furnace H
and the blow off pipes E led down behind the bridge to a lower cross pipe E¹ and
thence through the ash box the stop cock being either outside or as shewn operated
by a rod or lever carried through the ash box.. By the use of the intercepting
cross box or drum D the ordinary mud drum connected to the rear header may in
some cases be dispensed with.
Having now particularly described and ascertained the nature of the said inven--
tion and in what manner the same is to be performed, I declare that what I
claim is
1. In a sectional steam generator, the provision of a cross box, drum, or like
receptacle, having a blow off pipe or pipes interposed in the length of the lower
circulating tubes substantially as and for the purpose set forth.
2. In a sectional steam generator, the combination with the circulating tubes of
a sludge box or interceptor arranged to operate substantially as described.
Dated this Nineteenth day of January 1892.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.