Improvements in Fuel Economising and Smoke Consuming Apparatus for Steam Boilers.
Year: 1890

page_text: Date of Application, 28th Oct., 1890
Complete Specification Left, 25th July, 1891-Accepted, 29th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Fuel Economising and Smoke Consuming Apparatus
for Steam Boilers.
1, JAMES SCOTT, of 5 Summer Street, Lansdown Road, Oldham, in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
..
My invention relates chiefly to boilers of the Lancashire type with two flues and
the object of my invention is to consume the smoke and economise fuel.
In applying my improvements to a boiler i employ additional flues and dampers
which are so arranged that when fuel is fed into the furnace of one flue the dampers
are set so that the smoke and products of combustion pass over the fire in the other
furnace which is in a red hot state; as soon as this last named furnace needs
replenishing with fuel the dampers are changed so that the smoke &c., passes in the
other direction and is carried over the first named fire in its passage to the
chimney.
By this arrangement the heated gases pass five times along the length of the
boiler in place of three times as in the ordinary method of firing two flued
boilers.
My improvements could be applied to single flued boilers if two such were placed
side by side and the flues and passages with dampers arranged as before described
and boilers with more than two flues could be fitted with my improved arrangement
of flues and dampers and further either hand firing or mechanical stokers can be
employed to feed the furnaces.
H. B. BAKLOW,
Agent for Applicant.
No text detected.

page_text: And in order that my invention may be fully understood and readily carried into
effect I will describe the accompanying sheet of drawings reference being had to
the figures and letters marked thereon.
Figure 1 is an end elevation Fig. 2 a side elevation and Fig. 3 a plan of a two
flued Lancashire boiler to which my improvements have been applied.
In these views, A and B designate the doors of the two furnaces and C and D
their respective flues. Below and in communication with the flue C is a return
flue and a similar return flue F is placed below and in communication with
the flue D. Each of the return flues E and F is in communication by means of a side
flue G and H respectively with the flue 1 leading to the chimney and the side flues G
and H are also placed in communication with each other by means of a passage or
cross flue at the front of the boiler. There are six dampers K, L, M, N, O, P,
controlling the several flues and smoke passages.
After both furnace fires have been burning some little time and fuel is fed into
one of them say the furnace A. the dampers are set as follows:-The chimney
damper O is closed and the corresponding damper P opened, the cross flue damper K
and the side flue damper N are closed and the cross Hue damper L and the side flue
damper M opened.
The smoke and gases pass along the flue C then down and back along the return
flue E, thence through the side flue G and cross flue J into the front end of the
furnace flue D through which they pass returning underneath through the flue F
and finally pass away through the side flue II to the chimney flue I.
When firing through the furnace B the dampers are reversed those above
described as open being closed and vice versa.
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. An arrangement of flues and dampers by which the smoke and heated gases
arising from the combustion in one furnace flue are led back to the front of the
boiler and into and over the fire in another furnace flue along which they pass
before passing away to the chimney substantially as and for the purposes herein set
forth.
2. The combination and arrangement of parts embodying my improvements in
fuel economising and smoke consuming apparatus for steam boilers substantially as
herein described with reference to the drawings annexed.
Dated this 23rd day of July 1891
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicant.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicant.