Improvements in Sectional Steam Generators.
Year: 1891

page_text: Date of Application, 17th June, 1891-Accepted, 18th July, 1891
COMPLETE SPECIFICATION.
Improvements in Sectional Steam Generators.
I, CHARLES ALBERT KNIGHT, of 21 Bothwell Street, in the City of Glasgow,
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 has for its object the better adaptation of sectional steam
generators of the well known Babcock and Wilcox and similar types to situations
in which limited superficial area is available for their erection and to that end, the
invention consists in the construction of such boilers of two, three or more
complete but comparatively short tiers or sections of water circulating tubes and
headers superposed one over the other and connected to a steam and water drum
or drums above and a mud drum beneath.
In the accompanying drawings Figures 1 and 2 are vertical sections at right
angles to each other of a two tier high boiler of the improved construction.
Figure 3 is a plan of the same. Figures 4 and 5 are views corresponding to
Figures 1 and 2 of a three tier high boiler and Figures 6 and 7 are views showing
in detail the construction of the steam jet apparatus used for blowing off soot and
dust from the heating surfaces of the boiler.
As represented in these drawings the improved steam generator is composed of
a lower section containing a series of inclined water circulating tubes A situated
over a furnace or in a heating chamber, and connected at their ends to headers or
end pieces C, and an upper section containing a similar series of water tubes A¹
connected to headers in like manner; or as shewn at Figures 4 and 5 of two
upper sections composed of water tubes A¹ and A2 and headers C¹ and C².
The headers C, C1 and C2 in front as also those in rear are situated vertically
over each other and are connected together by short nipples e expanded into
orifices formed in their ends.
The water tubes A, A', A² are suitably curved to permit of convenient connection
to the vertical arrangement of headers, but the headers may be slightly inclined
to permit of the employment of straight water tubes. The uppermost of the
front headers C¹ or C2 is connected either by curved tubes D or by vertical and
horizontal tubes D' D2 and a connecting cross tube or box D³ to a cross drum E at
rear to which the rear headers are connected at the underside. The mud drum F,
is connected as usual to the lower ends of the rear headers C, and is also connected
directly to the underside of the steam and water drum E, by vertical tubes G on
each side of the furnace.
The steam generated in the boiler is collected in a small drum or dome H
situated over and connected to the main steam and water drum E.
The steam generator may be provided with a furnace for the combustion of
solid fuel but in the present instance it is contained by a bricklined chamber I
which serves as a combustion chamber for the gases from heating or other furnaces
or from gas producers and led in by a flue J underneath the water circulating
tubes A, the outlet for the products of combustion being by a chimney or flue K.
The boiler may be situated alongside of or over the heating furnaces. For
cleaning dust and soot from the heating surfaces, steam pipes L furnished with jets
or nozzles extending through the walls of the combustion chamber are provided
as shewn in detail at Figures 6 and 7.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is:-
:-
A sectional steam generator composed of a number of superposed sections
connected together and arranged substantially as hereinbefore described with
reference to the accompanying drawings.
Dated this Sixteenth day of June 1891.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.