Improvements in Evaporating Apparatus.
Year: 1892

page_text: Date of Application, 30th May, 1892
Complete Specification Left, 28th Feb., 1893-Accepted, 15th Apr., 1893.
PROVISIONAL SPECIFICATION.
Improvements in Evaporating Apparatus.
We, FRANK WALTER SCOTT, of 44, Christian Street Commercial Road, in the
County of London, Engineer, ERNEST GEORGE SCOTT, of Lord Street, Liverpool,
in the County of Lancaster, Consulting Chemist, and FRANK WALTER SCOTT
Junior, of 44 Christian Street aforesaid, Engineer, do hereby declare the nature of
this invention to be as follows:-
-
Our invention relates to evaporating apparatus of the kind having a series of
tubes through which the liquids to be evaporated circulates and around which the
heating medium, such as steam, is caused to circulate.
In apparatus of this kind as hitherto constructed it has been usual to arrange a
series of tubes of relatively small diameter, say two inches, around a tube of
relatively large, diameter, say twelve inches.
According to our invention we dispense with some of the smaller tubes and
substitute therefor tubes of an intermediate diameter, that is to say, of larger
diameter than the small tubes and of smaller diameter than the central tube, say,
for instance, tubes having a diameter of six inches, as we have found by experiment
that the use of such tubes of intermediate diameter greatly tends to promote a
rapid circulation of the liquid.
In some cases we find it advantageous to extend some of the tubes above the
level of the other tubes.
Deted the 20th dow of Man 1800
G. F. REDFERN & Co.,
4, South Street, Finsbury, London," Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Evaporating Apparatus.
We, FRANK WALTER SCOTT, of 44, Christian Street, Commercial Road, in the
County of London, Engineer, ERNEST GEORGE SCOTT, of Lord Street, Liverpool,
in the County of Lancaster, Consulting Chemist, and FRANK WALTER SCOTT
Junior, of 44, Christian Street aforesaid, 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 :-
Our invention relates to evaporating apparatus of the kind having a series of
tubes through which the liquids to be evaporated circulate and around which the
heating medium, such as steam, is caused to circulate.
In apparatus of this kind as hitherto constructed it has been usual to arrange a
series of tubes of relatively small diameter, say two inches, around a tube of
relatively large diameter, say twelve inches.
According to our invention we dispense with some of the smaller tubes and
substitute therefor tubes of an intermediate diameter, that is to say, of larger
diameter than the small tubes and of smaller diameter than the central tube, as we
have found by experiment that the use of such tubes of intermediate diameter
greatly tends to promote a rapid circulation of the liquid.
To enable our invention to be fully understood we will describe the same by
reference to the accompanying drawings, in which
Figure 1 is a plan view of a system of heating tubes arranged according to our
invention, and
Figure 2 is a central vertical section of the same.

page_text: a, a are the ordinary circulating tubes and 6 is the central tube. c, c, c¹, c¹ are
tubes of larger diameter than the ordinary tubes. As shewn in the drawing we
have arranged the tubes c, c at equal distances apart and about midway between
the central tube and the walls of the vessel and we have arranged the tubes c¹, c¹,
which are preferably of larger diameter than the tubes c, in a ring at the outside
of the ordinary tubes of the heating system.
In some cases we find it advantageous to extend some of the circulating tubes
above the level of the surrounding tubes, for instance, as shewn in Figure 2, the
extended tubes serving for the up-flow and the tubes on the level for the down-
flow.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
(1.) In an evaporating apparatus of the kind hercinbefore described the com-
bination with the ordinary tubes of a series of tubes of larger diameter substantially
as hereinbefore described for the purpose specified.
(2.) In an evaporating apparatus having a system of circulating tubes of the
kind hereinbefore described, extending some of the said tubes above the level of
the surrounding tubes substantially as hereinbefore described.
(3.) The improvements in evaporating apparatus hereinbefore described and
illustrated in the accompanying drawings.
Dated the 20th 1
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.