Incrustation in Steam Boilers.
Year: 1885

page_text: Incrustation in Steam Boilers.
"
I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake & Co, Patent
Agents, Southampton Buildings, in the County of Middlesex, do hereby declare
the nature of my invention for AN IMPROVED METHOD OF AND APPARATUS FOR
PREVENTING INCRUSTATION IN STEAM BOILERS and in what manner the same is
to be performed, to be particularly described and ascertained in and by the following
statement:
"
This invention relates to an improved method of and apparatus for preventing
the formation of scale in boilers.
The inconveniences resulting from the formation of scale in boilers are well
understood, and many devices have been constructed to obviate them. Among
other expedients, the water has been moved continuously from the boiler through
a filter, the circulation of the water being caused by the difference in weight of two
columns of water of different temperatures. The devices constructed according to
this theory have, however, proved ineffectual and valueless, chiefly because the
water will not circulate properly, there being no positive force to move it. If a
pump is used to move the water, the filter, unless it is closely watched, becomes
filled with silt and other foreign matter extracted from the water and the free cir-
culation through it is prevented; and as the pump exerts a continuous pressure,
the filter or pipes are, in the course of time, likely to be taxed beyond their capacity
and are in danger of bursting. There are other objections to the use of a pump
that will be understood by persons having a knowledge of their functions and mode
of operation, when employed for the purpose stated.
The object of my present invention is to overcome these objections and to provide
means whereby the water receives a suitable pressure and is moved in a continuous
passage through the boiler and filter, the apparatus operating automatically and
economically, and requiring no special attention. Its distinctive novelty consists in
using a steam trap of any desired kind or construction to move the water as
hereinafter fully set forth.
.

page_text: The acccompanying drawing shows in side elevation the application of my
invention to a boiler.
A represents a boiler of any suitable construction and dimensions, and B a filter
connected therewith by means of a pipe a, provided with the stop valve b. To the
lower end of the filter is connected a steam trap C, by means of the delivery pipe D
having a check valve d; said trap being also connected with the boiler A. by means
of the discharge pipe E having a check valve e. Connected with the upper part of
the boiler is the equalizing pipe c running from the trap C.
In operation the water from the boiler passes through the pipe a into the filter B,
said pipe a being connected to the filter at a point below the water line in the
boiler. The water then passes down through the filter and through the delivery
pipe D into the trap C, whence it will again flow into the boiler A. through the
discharge pipe E, and into the filter through the pipe a. In this way a constant
circulation of the water through the boiler and filter is kept up as long as the
generation of steam is continued in the boiler. By thus causing the water to
circulate continuously through the boiler and filter, the impurities are extracted
from the water before they have accumulated sufficiently to adhere to the boiler,
whereby incrustation is prevented.
A trap of any construction may be used, but I prefer to employ that described
in the specification of Letters Patent of the United States of America dated
December 5th, 1882 and numbered 268,384, which is so well known that a detailed
description of its construction or operation is not deemed necessary. Neither do
I limit myself to the use of a filter of any particular kind, but I prefer to use that
which is described in the specification of Letters Patent of the United States of
America, granted to J. W. Hyatt and dated March 6, 1883, number 273,542, which
filter I prefer because it is so constructed that the filtering bed may be easily and
readily cleansed.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated
to me by my foreign correspondent I declare that what I claim is
First. The method of preventing the formation of scale in boilers, substantially
as above specified.
Second. The apparatus for preventing the formation of scale in boilers, consisting
of the parts described and arranged to operate, substantially as set forth.
Third. The apparatus for preventing the formation of scale in boilers, and con-
sisting of a filter, and a steam trap connected with both the boiler and the filter,
and adapted to move the water in a continuous passage through both boiler and
filter, substantially as set forth.
Fourth. The apparatus for preventing the formation of scale in boilers, consisting
of a filter connected with the boiler by means of the pipe a, and the steam-trap C,
connected with the filter by the pipe D'and with the boiler by means of pipes E, c,
substantially as set forth.
DAL
Namambo. JOOK
HASELTINE, LAKE & Co.,
For the Applicant.