An Improved Method of Boiling and Evaporating Liquids, and of Digesting Materials in Liquids.
Year: 1897

page_text: Date of Application, 7th May, 1897
Complete Specification Left, 7th Feb., 1898-Accepted, 23rd Apr.,
1898
PROVISIONAL SPECIFICATION.
An Improved Method of Boiling and Evaporating Liquids, and of
Digesting Materials in Liquids.
I, HUGH MCPHAIL, of The Towers, Wakefield, in the County of York, Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved method of boiling and evaporating liquids,
and of digesting materials in liquids in open or closed vessels and the said inven-
tion has for its object to perform the operations of heating, boiling, digesting, and
evaporating at any desired temperature within the range of heated vapour.
For the purpose of my invention I employ superheated steam which is blown
or injected into the vessel containing the liquids or materials to be treated.
The superheated steam may be obtained by any convenient superheater heated in
any suitable manner, thermometers or pyrometers being provided to determine
the temperature, and a reducing valve being employed to reduce the pressure of the
superheated steam when necessary or desirable. In some instances exhaust steam
superheated to any desired degree may be used with advantage.
.
1002
HASELTINE, LAKE & Co.,
45, Southampton Buildings, W.C., Agents for the Applicant.
An Improved Method of Boiling and Evaporating Liquids, and of
Digesting Materials in Liquids.
I, HUGH MCPILAIL, of The Towers, Wakefield, in the County of York, 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 follow-
ing statement:―
I have described in the Complete Specification of an application for Patent
No. 11,448 of 1897, filed simultaneously herewith, a method of drying such materials
as yarns and textile fabrics by superheated steam brought into actual or direct
contact therewith. It is the object of my present invention to utilize the same
method for such purposes as boiling or evaporating liquids or for digesting materials
in liquids.
The manner in which I carry out my invention is similar to that set forth in my
aforesaid specification, that is to say I employ a vessel or chamber in which the
substances to be treated are placed and to which the superheated steam is supplied
from a superheater which may be arranged in proximity thereto, the superheated
steam after acting on the liquids or materials under treatment together with the
037

page_text: steam of evaporation being withdrawn from the vessel or chamber by any suitable
means.
Iu the accompanying drawings I have illustrated an apparatus suitable for carry-
ing out my invention, Figure 1 being a vertical section and Figure 2 a plan thereof.
This apparatus is similar in construction to that illustrated in the drawings form-
ing part of the Complete Specification of another application for Patent filed
simultaneously herewith, viz: No. 11,450 of 1897.
A is the vessel containing the liquid or materials to be treated. B is a pipe
through which the superheated steam is led from the superheater to the interior
of the said vessel so as to come into direct contact with the liquid or materials
therein. This pipe may be provided with a valve B and may deliver the super-
heated steam from an open end thereof or from suitable perforations formed therein,
or said pipe may be connected to a number of branch pipes B situated within the
chamber A and the superheated steam escape from the open ends thereof or
through perforations formed therein. C is an opening at the bottom of the said
vessel provided with means for closing it; through this opening the liquid or
materials can be allowed to escape from the vessel A after their treatment therein
has been completed. The said vessel A may be either open or closed and if desired
a number of them may be arranged within an enclosing chamber as set forth in
my aforesaid Complete Specification No. 11,450 of 1897.
I do not confine myself to the use of the apparatus herein described, as apparatus
of other construction may be employed. For instance apparatus of the kind shewn
and described in my Complete Specification No. 11,449 of 1897 may be utilized for
my present purposes.
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. A method of boiling and evaporating liquids, or of digesting materials in
liquids, by subjecting them to the direct action of superheated steam substantially
as described.
2. Apparatus substantially such as that herein described employed for the
purpose of my invention as above set forth.
Dated this 7th day of February 1898.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.