Improvements in and relating to Evaporators.
Year: 1899

page_text: PROVISIONAL SPECIFICATION..
Improvements in and relating to Evaporators.
I, JAMES HARVEY, of 224, West Street, in the County of the City of Glasgow.
Engineer, do hereby declare the nature of my invention to be as follows, a
communication from abroad by Robert Harvey, New York, Engineer:-
This invention has reference to improvements in and relating to evaporators,
and particularly those known as triple or multiple effects.
According to these improvements the calandrias or heating vessels and the
juice circulating chambers are placed at distances apart vertically over each other
within an outer shell.
The calandrias may be formed with circular drums and exhaust steam would be
led into the lowest or first calandria and after heating the juice circulating
through the tubes and spaces in it the vapour from the liquor would pass down-
ward from top of chamber through a duct where a deflecting partition or baffle
plate is fitted, and then up the other side of partition into the second calandria,
and in like manner the vapour from the second evaporating chamber would
pass to the calandria of the third, or vice versa, the first evaporating vessel may
be placed at top and the others in line below.
Instead of leading the vapour from the one vessel to the other at the sides, it
may be led up from the evaporating chambers through necks or open ducts at the
centre of vessel into the several calandrias in sequence, and in this case horizontal
dash or baffle plates may be introduced at upper parts of evaporating vessels.
These calandrias may be enlarged by opening them up at the. vertical joints
of their shells, and introducing extension plates, to which would be secured top
and bottom sectional tube plates carrying additional heating tubes.
The tubes would or may be formed of oblong or oval flattened shape, or parallel
duplex plates may be introduced and the liquor circulate through the spaces
between these.
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1000
Improvements in and relating to Evaporators.
I, JAMES HARVEY, of 224, West Street, in the County of the City of Glasgow,
Engineer, do hereby declare the nature of my invention and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement in writing reference being made to the accompanying
drawings (a communication from abroad by Robert Harvey, New York,
Engineer):
:-
•
This invention has reference to improvements in and relating to evaporators,
and particularly those known as triple or multiple effects.

page_text: And in order that this invention and the manner of carrying same into prac.
tice may be properly understood I have hereunto appended a sheet of drawings
in which Figure 1, represents a sectional elevation of a triple effect evaporator as
constructed in accordance with these improvements; while Figures and are
detached horizontal views through the vapour uptake channels and showing the
extending joints.
Referring to said drawings:-
According to these improvements the calandrias or heating vessels A, and the
juice circulating chambers B, and D), are placed at distances apart vertically or in
column line over each other.
'
,
The calandrias may be formed with circular drums A, and exhaust steam would
be led through a branch A', into the lowest or first calandria, and after heating
the juice circulating through the tubes a, and spaces in it, the vapour from the
liquor would pass downward from top of chamber B, through a duct 6 where a
deflecting partition or baffle plate is fitted, and then up the other side of par-
tition, through a duct 62, into the second calandria A, and in like manner the
vapour from the second evaporating chamber B, would pass to the calandria A, of
the third; or vice versa, the first evaporating vessel may be placed at the top and
the others in line below.
*
These calandrias A, may be enlarged by opening them up at the joints C, of
their shells, as indicated in Figures 2 and 3, and introducing extension plates X,
to which would be secured top and bottom sectional tube plates carrying addi-
tional heating tubes.
The tubes a would or may be formed of oblong or oval flattened shape, 'or
ordinary parallel duplex plates may be introduced and the liquor circulate through
the spaces between these.
The juice would be fed to the chamber D, below the lower tube plate of the
lower evaporator through a pipe D¹, fitted with a regulating valve D², and these
chambers would be fitted with tapered or inclined bottoms d, and after the juice
has circulated upward through the tubes, and downwards through the drum
space. A², the outlet of concentrated juice takes place from the lower evaporating
chamber I, through a pipe d', to a pipe &, leading to the valve B, and pipe B¹,
of the second evaporator; and in like manner the further concentrated juice from
the second evaporator would pass by pipes e¹, e³, to the valve C³, and pipe C¹, of
the third evaporator, and the fully concentrated juice or syrup would pass through
a pipe f, through a regulating valve f, to vacuum pan supply tank.
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
First. The method of constructing evaporators, consisting in forming calandrias
with vertical juice circulating tubes, and evaporating or vapour generating
vessels over each other in vertical columns so as to form triple or multiple effects,
substantially as herein described in reference to and illustrated in the accom-
panying drawings.
Second. The arrangement in combination of evaporators in which the vessels
are placed vertically or in column form over each other, and fitted with vapour
deflecting plates, to produce triple or multiple effects, substantially as herein
described in reference to and shown in the accompanying drawings.
Third. The arrangement in combination of multiple effect evaporators in which
the vessels are placed vertically or in column form over each other, and fitted
with joints capable of receiving extension plates, substantially as herein described
in reference to and shown in the accompanying drawings.
1000