Improvements in Evaporating or Concentrating Apparatus.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Evaporating or Concentrating Apparatus.
We, JOHN MCNEIL, of the Colonial Iron Works, Helen Street, Govan, in the
County of Lanark, North Britain, Engineer, and JULIUS LEWKOWITSCH, of
Lancaster Avenue, Manchester, in the County of Lancaster, Chemist, do hereby
declare the nature of this invention to be as follows, that is to say:-
Our said invention has for its object to improve the construction and action
of apparatus for evaporating or concentrating liquids, more especially such as,
when heated, deposit crystalline or other solid matters.
Our improved apparatus comprises a closed metal vessel made with a dome-
shaped top in which is an opening provided with a mandoor also an outlet for
steam or vapor connected to condensing apparatus in which a vaccum is main-
tained. The liquid to be operated on is introduced through a valved inlet in
the side of the vessel. The vessel is, relatively, of considerable height and is
only about half filled with liquid when charged so that there is a large vapor
space above the liquid; and a partly conical bafle shell is fitted within the top
dome to prevent froth reaching the outlet.
In the lower part of the vessel there is a hollow drum the circumference of
which is corrugated circularly, or made with circular ridges and furrows. The
drum is fixed by end disks on a horizontal tubular shaft the ends of which ex-
tend through stuffing boxes in opposite sides of the vessel, the shaft being made
to rotate by gearing applied to one end. Steam is admitted through one end
of the shaft to the interior of the drum, and within the drum there is a scoop
which in rotating raises water due to condensation and leads it into another part
of the tubular shaft from the end of which it is discharged.
As the operation proceeds saline or other solid matters would become deposited
on the drum but they are continuously removed therefrom by brushes, preferably
of wire, or scrapers in contact with which the drum rotates; and fall into the
bottom part of the vessel. Or chains hung in loops from a bar over the rotating
drum may be used for scraping the drum.
For discharging these saline or other solid matters while the evaporation or
concentration proceeds uninterruptedly the bottom is provided with a valved
outlet, to which may be attached a discharge vessel.
Dated this Fourth day of December 1807
Improvements in Evaporating or Concentrating Apparatus.
We, JOHN MCNEIL, of the Colonial Iron Works, Helen Street, Govan, in the
County of Lanark, North Britain, Engineer, and JULIUS LEWKOWITSCH, of
[Price 8d

page_text: Lancaster Avenue, Manchester, in the County of Lancaster, Chemist, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, that is to say:—
Our said invention has for its object to improve the construction and action
of apparatus for evaporating or concentrating liquids, more especially such as
when heated, deposit crystalline or other solid matters.
And in order that our said invention and the manner of performing the same
may be properly understood we hereunto append a sheet of explanatory draw-
ings, to be hereinafter referred to in describing our improved apparatus.
Figure, 1, is a vertical section of our improved apparatus, and Figure, 2, is a
transverse vertical section of a detail in connection therewith. In these draw-
ings the same reference letters are used to mark the same or like parts wherever
they are repeated.
Our improved apparatus comprises a closed metal vessel, A, made with a dome-
shaped top, B, in which is an opening, C, provided with a man door, D, also
an outlet, E, for steam, or vapor, connected to condensing apparatus (not shown)
in which a vacuum is maintained. An eye glass, F, is also provided for in-
specting operations within the vessel, A. The liquid to be operated upon is
introduced. through a valved inlet, G, in the side of the vessel, A. The vessel, A,
is relatively of considerable height, and is only about half filled with liquid
when charged, so that there is a large vapor space above the liquid.
In the lower part of the vessel, A, there is a hollow drum, H, the circumfer-
ence of which is corrugated circularly, or made with circular ridges and
furrows. The drum, H, is fixed by end disks, J, on a horizontal tubular shaft, K,
the ends of which extend through stuffing boxes, L, in opposite sides of the
vessel, A, the shaft being made to rotate by gearing, M, applied to one end.
Steam is admitted by a valved inlet, N, and passes by ports, P, through one
part, Q, of the shaft and thence through openings, R, into the interior of the
drum. Within the drum, H, there is fixed a scoop, S, which in rotating raises
water due to condensation, and leads it into another part, T, of the tubular shaft
from the end of which it is discharged through a pipe, U.
'As the operation proceeds saline or other solid matters would become deposited
on the drum, H, but they are continuously removed therefrom, by brushes, V,
preferably of wire, or it might be scrapers, in contact with which the drum and
disks, J, rotate, and fall into the bottom part of the vessel, A. Or chains hung
in loops from a bar over the rotating drum may be used for scraping the drum.
For discharging these saline or other solid matters while the evaporation or
concentration proceeds uninterruptedly, the bottom of the vessel, A, is provided
with a valved outlet, W, which may be connected to a discharge vessel.
Having now particularly described and ascertained the nature of our said
invention. and in what manner the same is to be performed, we declare that what
we claim is :-
An improved evaporating and concentrating apparatus, comprising a closed
metal vessel the lower part of which has rotating in it a hollow corrugated
drum heated by steam, brushes or scrapers or chains being provided for cleaning
or scraping the drum, the parts being constructed arranged and operating sub-
stantially as herein before described with reference to the accompanying drawings.
Dated this Second day of September 1898.
EDMUND HUNT,
Applicants' Agent.