Improvements in and relating to Oil Extractors and Feed Water Purifiers and Heaters.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Oil Extractors and Feed Water
Purifiers and Heaters.
We, ISAAC SHIMWELL MCDOUGALL, of High Bank, Didsbury, in the County of
Lancaster, Manufacturer, and ARTHUR COLLIER, of 54, North Street, Goole, in the
County of York, Engineer, do hereby declare the nature of this invention to be
as follows:-
The present invention has reference to oil extractors and feed water purifiers
and is principally designed for the extraction of oily or greasy matters from the
water of condensation used for feeding steam boilers, but is of course applicable
for other purposes. The invention is designed for effecting the extraction of the
oily or greasy matters contained in the water in a somewhat soluble form either
with or without the use of certain chemical re-agents such as calcium chloride or
a mixture of calcium chloride and caustic lime by which the oily matters are
precipitated; and for assisting in or effecting the precipitation of lime with or
without the use of certain chemical re-agents such as a mixture of caustic soda
and carbonate of soda; and for assisting in or effecting the purification of the
water from other soluble substances.
The invention consists in heating the water containing the impurities to be
extracted in its passage through the extractor by means of a pipe or series of
pipes or tubes through which high pressure steam is caused to pass, and is more
especially applicable to such oil extractors as are described in the Specification to
British Letters Patent No. 21867/92, granted to one of us viz. Isaac Shimwell
McDougall.
In carrying our invention into effect we provide a conical casing such as one
of those described in the Specification of the aforementioned Letters Patent, and
we form an inlet and outlet for the feed water at the base thereof upon opposite
sides, and along the base of the casing we provide a series of short partitions
which project preferably to a short equal extent into the casing, and projecting
between such short partitions we provide long radiating partitions reaching
towards the apex of the conical casing, the interstitial spaces of such long
radiating partitions gradually lessening in width towards their upper extremity
above which a space is provided for the collection of the oil. A pipe or series
of pipes or tubes are arranged in a tortuous line between the opposing extremities
of the short and long partitions of the casing, the casing being preferably divided
at this line of intersection to permit of the introduction of the pipe or series of
pipes or tubes. High pressure steam is caused to pass through such pipe or pipes
and the water is taken in through the inlet to the extractor and passes around the
opposing edges of the short and long partitions towards the outlet at the opposite
end, being heated in its course by means of the high pressure steam thereby more
effectually separating the oil contained in the water in a more or less soluble
state, so that such oil may pass up the interstitial spaces of the long radiating
partitions to the chamber at the apex of the conical casing, whence it is drawn
off. This action is preferably effected by the aid of chemical re-agents such as

page_text: calcium chloride or a mixture of calcium chloride and caustic lime which render
the oily or greasy matters contained in the feed water insoluble, and the oily or
greasy particles so separated precipitate and the feed water emanates at the outlet
in a substantially pure condition.
Hand holes or sludge cocks may be provided for the sediment to be extracted
from the casing at intervals.
The use of a high pressure steam pipe or series of pipes in an extractor such
as that before described may assist in or effect the precipitation of other soluble
impurities such as lime, a suitable re-agent such as a mixture of caustic soda
and carbonate of soda being employed to effect precipitation in the case of lime,
which precipitation is more effectual and complete at the high temperature to
which the water attains by contact with the high pressure steam pipes.
By the use of the present invention oily or greasy matters, lime or other
soluble impurities may be precipitated or extracted from feed water
without the use of chemical re-agents, as the high temperature to which the water
is subjected may suffice for this purpose.
Dated this 18th day of 1007
Dated this 18th
day of May
May 1807
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
Improvements in and relating to Oil Extractors and Feed Water
Purifiers and Heaters.
We, ISAAC SHIMWELL MCDOUGALL, of High Bank, Didsbury, in the County of
Lancaster, Manufacturer, and ARTHUR COLLIER, of 54, North Street, Goole, 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 ascer-
tained in and by the following statement:-
The present invention has reference to oil extractors and feed water purifiers
and is principally designed for the extraction of oily or greasy matters from the
water of condensation used for feeding steam boilers, but is of course applicable
for other purposes. The invention is designed for effecting the extraction of the
oily or greasy matters contained in the water in a somewhat soluble form either
with or without the use of certain chemical re-agents such as calcium chloride or
a mixture of calcium chloride and caustic lime by which the oily matters are
precipitated; and for assisting in or effecting the precipitation of lime with or
without the use of certain chemical re-agents such as a mixture of caustic soda
and carbonate of soda; and for assisting in or for effecting the purification of the
water from other soluble substances.
The invention consists in heating the water containing the impurities to be
extracted in its passage through the extractor by means of a pipe or series of
pipes or tubes through which high pressure steam is caused to pass, and is more
especially applicable to such oil extractors as are described in the Specification to
British Letters Patent No. 21867/92, granted to one of us viz. Isaac Shimwell
McDougall.
Several modifications of the invention are illustrated in the accompanying
sheet of drawings and as follows.
Figures 1 and 2 are longitudinal section and end elevation of a combined heater
and oil extractor.

page_text: Figure 3 is a longitudinal section illustrating a second modification of the same.
Figure 4 is a longitudinal section illustrating a third modification of the same.
In carrying our invention into effect as illustrated in the drawings a conical
casing A is provided such as one of those described in the Specification of the afore-
mentioned Letters Patent, and an inlet B and an outlet C is provided for the feed
water at the base thereof upon opposite sides, and the base may be a separate
casting D as in Figures 1, 2 and or in one with the casing A as in Figure 4.
Similarly again in the casing there is provided a series of short partitions E
which project from the bottom preferably to a short equal extent into the casing,
and projecting between such short partitions there is provided long radiating
partitions F, F, reaching towards the apex of the conical casing A, the interstitial
spaces of such long radiating partitions gradually lessening in width towards
their upper extremity above which a space G is provided for the collection of the
oil.
A pipe H (or series of pipes may be employed) is arranged in a tortuous line
between the opposing extremities of the short and long partitions E, F, of the
casing A, this casing in the modification shown at Figures 1, 2, and 3, being
divided as shown and arranged with the necessary flanges I I to form a joint to
permit of the introduction of the pipe H.
In the modification set forth in Figure 4 the casing A is in one piece and the
pipe H is inserted through the flange or long cover J fixed with studs or bolts
to the side of the casing, this cover being indicated by dotted lines. High pres-
sure steam is caused to pass through the pipe H and the water is taken in through
the inlet B to the extractor and passes round the opposing edges of the short and
long partitions E, F, towards the outlet C at the opposite end, being heated in
its course by means of the high pressure steam thereby more effectually separating
the oil contained in the water in a more or less soluble state, so that such oil may
pass up the interstitial spaces of the long radiating partitions F to the chamber Ğ
at the apex of the conical casing, whence it is drawn off. This action is prefer-
ably effected by the aid of chemical re-agents such as calcium chloride or a
mixture of calcium chloride and caustic lime which render the oily or greasy
matters contained in the feed water insoluble, and the oily or greasy particles so
separated precipitate and the feed water emanates at the outlet in a substantially
pure condition.
In the arrangement illustrated at Figure 3 the bottom portion D) of the casing A
is arranged with its short partitions E, E not quite reaching the bottom of the
casing with the exception of every third or any other number of partitions and
this arrangement permits the discharge of the sediment through sludge cocks
fitted to branch K in a convenient manner without interfering with the flow of
the water in its proper course. Handholes may be arranged at the sides of each
division instead of sludge cocks.
The method for removing the sediment at intervals illustrated at Figure 4
consists in forming ports L in each of the bottom divisions and governing these
ports by a grid slide M operated by the hand screw N. This forms practically
a large sludge cock with multiple passages and the sediment is discharged into
the chamber 0 and blown out from there by the cock R.
The re of a high pressure steam pipe or series of pipes in an extractor such as
that before described may assist in or effect the precipitation of other soluble
impurities such as lime, a suitable re-agent such as a mixture of caustic soda and
carbonate of soda being employed to effect precipitation in the case of lime, which
precipitation is more effectual and complete at the high temperature to which
the water attains by contact with the high pressure steam pipes, and it may be
further assisted by constructing the partitions of zinc and the coil or pipes of
copper or any suitable metals to set up with the water electro galvanic action.
By the use of the present invention oily or greasy matters, lime or other soluble
impurities may be precipitated or extracted from feed water without the use of

page_text: chemical re-agents, as the high temperature to which the water is subjected may
suffice for this purpose.
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 oil extractors and feed water purifiers arranged with short partitions
and interleaving long radiating partitions through which the water under treat-
ment pursues a tortuous course the provision of a pipe or pipes in the path of
the water's flow through which high pressure steam is blown to heat the feed
water and assist in the extraction of the oil while further purifying the water
substantially as described.
2, The improved oil extractor, feed water heater, and purifier substantially as
hereinbefore described with reference to Figures 1 and 2 of the accompanying
drawings.
3, The improved oil extractor, feed water heater and purifier substantially
as herein before described with reference to Figure 3 of the accompanying drawings.
4,-In oil extractors and feed water heaters and purifiers in combination a
heating coil, means for extracting and replacing the same within the casing, and
means for removing the sediment at intervals by a sludge grid valve and blow
off cock substantially as hereinbefore described with reference to Figure 4 of the
accompanying drawinga.
thi 144h Wahm 1909
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.