Improvements in Evaporating Apparatus.
Year: 1895

page_text: Date of Application, 15th Mar., 1895
Complete Specification Left, 12th Dec., 1895-Accepted, 25th Jan., 1896
Improvements in Evaporating Apparatus.
JAMES BINGHAM ALLIOTT of Bloomsgrove Works, Nottingham, Engineer,
do hereby declare the nature of this invention to be as follows :-
This invention has for its object to obtain increased convenience, efficiency and
economy in connection with evaporating apparatus and relates to that form in which
the evaporation is produced by the use of low pressure exhaust steam (from a
noncondensing steam engine or the like) supplemented by high pressure.steam from
any suitable steam generator or other convenient source, and it has special relation
to that form of evaporating apparatus in which several vessels are employed, the
first one being heated from an external source and the next so connected thereto
that the steam or vapour from the contents of the first is used to heat the next and
so on throughout the series.
In my invention I make use of what for distinctiveness I call a preliminary
evaporator which is heated by high pressure steam from an extraneous source, and
the resulting steam from the contents of this vessel I convey (in conjunction with
and at the same pressure as the exhaust low pressure steam above referred to) to
the first of the series of evaporators constituting the multiple effect proper. This
preliminary evaporator I so proportion in regard to capacity and heating surface
that it is easily capable of generating from its contents all the supplementary steam
necessary, in conjunction with the exhaust steam aforesaid, to produce effective
action throughout the whole battery of evaporation, and I equip it with a reducing
valve so adjusted as to feed steam to the first vessel of the multiple effect battery
at the same pressure as that of the exhaust steam with which it mingles and a
safety valve is also added as a precaution in case the reducing valve should from
any cause cease to act.
The pressure in the preliminary evaporator may of course be much higher than
that of the exhaust steam and it will be readily seen that its supplementary delivery
of steam to the battery will be automatically governed, as a fulness of supply of
exhaust steam for this purpose, by drawing less upon the preliminary evaporator
will allow a corresponding rise of pressure and temperature to take place within it
thereby diminishing the evaporation produced.
In regard to its construction the preliminary evaporator may be exactly of the
same form as the vessels composing the battery except in regard to capacity and
equipment, the reducing valve, safety valve and such like accessories being
necessary additions to enable it to fulfil its function as a regulator or governor, all
other fittings for supplying liquid and the like being the same throughout all the
vessels.
Although for clearness only one preliminary evaporator, in conjunction with a
battery of vessels for obtaining a multiple effect is described, it is obvious other
combinations may be formed without departing from the spirit of my invention, for
instance a single preliminary evaporator may be used in connection with a single
other vessel or one preliminary evaporator may discharge into a second provided
with a reducing valve suitably adjusted as above described, and the second one may
be in connection with the battery.
Dated this 15th day of March 1895.
J. E. EVANS-JACKSON & Co.,
Agents for the Applicant.

page_text: !
I, JAMES BINGHAM ALLIOTT of Bloomsgrove Works, Nottingham, 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 to obtain increased convenience, efficiency and
economy in connection with evaporating apparatus and relates to that form in which
the evaporation is produced by the use of low pressure exhaust steam (from a
noncondensing steam engine or the like) supplemented by high pressure steam from
any suitable steam generator or other convenient source, and it has special relation
to that form of evaporating apparatus in which several vessels are employed, the
first one being heated from an external source and. the next so connected thereto
that the steam or vapour from the contents of the first is used to heat the next and
soon throughout the series.
A
In my invention I make use of what for distinctiveness, I call a preliminary
evaporator which is heated by high pressure steam from an extraneous source, and
the resulting steam from the contents of this vessel I convey (in conjunction with
and at the same pressure as the exhaust low pressure steam above referred to) to
the first of the series of evaporators constituting the multiple effect proper. This
preliminary evaporator I so proportion in regard to capacity and heating surface
that it is easily capable of generating from its contents all the supplementary steam
uecessary, in conjunction with the exhaust steam aforesaid, to produce effective
action throughout the whole battery of evaporation, and I equip it with a reducing
valve so. adjusted as to feed steam to the first vessel of the multiple effect battery.
at the same pressure as that of the exhaust, steam with which it. mingles and a
safety valve is also added as a precaution in case the reducing valve should from
any cause cease to act
The pressure in the preliminary evaporator may of course be much higher than
that of the exhaust steam and it will be readily seen that its supplementary delivery
of steam to the, battery will be automatically governed, as a fulness of supply of
exhaust steam for this purpose, by drawing less upon the preliminary evaporator
will allow a corresponding rise of pressure and temperature to take place within it
thereby diminishing the evaporation produced.
In regard to its construction the preliminary evaporator may be exactly of the
same form as the vessels composing the battery except in regard to capacity and
equipment, the reducing valve, safety valve and such like accessories being
; necessary additions to enable it to fulfil its function as a regulator or governor,
all other fittings for supplying liquid and the like being the same throughout all
the vessels.
Although for clearness only one preliminary evaporator, in conjunction with a
battery of vessels for obtaining a multiple effect is described, it is obvious other
combinations may be formed without departing from the spirit of my invention,
for instance a single preliminary evaporator may be used in connection with a
single other vessel or one preliminary evaporator may discharge into a second
provided with a reducing valve suitably adjusted as above described, and the second
one may be in connection with the battery.

page_text: 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 :-
An evaporating apparatus, constructed substantially according to, and combining
the improvements set forth and described in the foregoing Specification.
Dated this 12th day of December 1895.
J. E. EVANS-JACKSON & Co.,
Agents for the Applicant.