IMPROVEMENTS IN FEED-WATER HEATERS AND PURIFIERS
Year: 1885

page_text: I, WALLACE FAIRWEATHER C.E. of 135 Buchanan Street, Glasgow, in the
County of Lanark, Fellow of the Institute of Patent Agents, do hereby declare the
nature of my said Invention for "IMPROVEMENTS IN FEED-WATER HEATERS AND
PURIFIERS" and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement (the same being
a communication to me from abroad by Milton W. Hazelton and the Babcock &
Wilcox Company of New-York in the United States of America, Steam Boiler
Manufacturers).
The present invention relates to that class of devices in which the temperature
of the feed water is elevated by contact with live steam and cleared of impurities
in its continued passage to the boiler.
The invention consists in combining a chamber partially filled with lumps of
coke, or equivalent substance, with a settling chamber, and also with a filtering
chamber as will be hereinafter particulary described and claimed.
In the accompanying drawings which illustrate the invention; A represents the
shell of the heater and purifier, generally made in cylindrical forn and provided
with connections consisting of a steam inlet a, water inlet b water exit or delivery c,
and a discharge or blow off pipe d. In the modification illustrated in Figures 1
and 2 the interior of the device is divided into three separate but communicating
chambers.
The chamber B, is arranged at or near the upper portion of the device, and
partially filled with lumps of coke, or an equivalent substance; the chamber K is
located at or near the bottom of the device and communicates with the chamber B,
through the passage or pipe E, and the intermediate chamber C surrounds the pipe
or passage E, perforated diaphragms being supplied at the bottom of the chamber B
and chamber C. This intermediate chamber C₁ also contains lumps of coke or
other separating or filtering material.
The water inlet pipe b is extended into the upper part of the chamber B, turned
vertically, closed at its top, and provided with numerous lateral perforations
through which the water is ejected in jets.
In the modification illustrated in Figures 3 and 4 of the drawings, A represents
the shell of the heater and purifier generally made in cylindrical form and provided
with a steam inlet a, water inlet b, water exit or delivery, c, and a discharge or
blow-off pipe d.
B represents the steam chamber partially filled with coke or similar substance.
B¹ a separated filtering chamber containing any suitable filtering material and Ca
settling chamber that communicates with the chambers B, B' through a perforated
dianhroo

page_text: The water inlet pipe b is extended into the upper part of the steam chamber B
and provided with branch pipes or nozzles x, x, each being fitted with a perforated
cap & as shown.
The steam chamber B is partially filled with coke or similar substance and the
filtering chamber B' contains any suitable filtering material.
The feed-water is forced through the pipe b, and discharged vertically in the form
of spray or jets that impinge against the adjacent end of the shell, which farther
separates the divided spray and facilitates its elevation in temperature by contact
with the admitted steam. The water gravitates through the chamber B; in a
divided and heated state to the settling chamber C or K, and rises in the filtering
chamber B' or C, to the level of the delivery pipe c.
Such portion of the impurities that is not deposited on the surfaces of the lumps
of coke in the chamber B, will find its way to the settling chamber C or K, and if
carried by entrainment into the filtering chamber B₁ or C, it is still farther arrested
by the filtering material in the chamber B¹ or C¹, that extends to the final exit of
the water from the device.
The respective pipe connections are provided with the usual cocks or valves for
regulating the water and steam supply and suitable man and hand holes are also
provided for the introduction of the coke and for cleaning or repairs.
In operation water is forced by a feeding pump, through the pipe b, which
discharges the same through its perforated end in the form of fine spray or jets.
Steam is brought in contact with the water jets through the pipe a, and the
temperature of the water is elevated to practically the same degree.
The water gravitates around the lumps of coke and through the tube E, to the
settling chamber K or C, and rises in the chamber. B' or annular chamber C¹ until
it reaches the level of the outlet pipe c, that communicates with the boiler.
The heavier portion of the impurities that is not arrested by the coke in the
chamber B, will lodge in the chamber K or C, at the bottom of the device, and
the lighter portion, like magnesia for example, that is carried in entrainment, to
the chamber K or C, will naturally rise in the chamber C¹ or B₁ and will be
arrested by the lumps of coke therein, and not permitted to reach the delivery
exit.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1. In a feed water heater and purifier the combination of a steam chamber
partially filled with lumps of coke or equivalent substance, a settling chamber, and
a connected passage, substantially as specified.
2. In a feed water heater and purifier the combination of a steam chamber
partially filled with lumps of coke or equivalent substance, a settling chamber and
connected passage, and a filtering chamber substantially as shown in Figure 1.
3. In a feed water heater and purifier the combination of a steam chamber
partially filled with lumps of coke or similar substance, a separated filtering chamber
containing suitable filtering material and a connecting settling chamber located
beneath and adjacent to both substantially as shown in Figure 3.
Date: 10LL
L
CRUIKSHANK & FAIRWEATHER,
135, Buchanan Street, Glasgow,
Agents.