Improvements in the Trays or Grids of Gas Purifying Apparatus.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in the Trays or Grids of Gas Purifying Apparatus.
I GEORGE HENRY TURNBULL of New Westminster, in the Province of British
Columbia and Dominion of Canada, Builder 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 following statement :—
My invention relates to the lime trays or grids used in purifying and manufacturing
gas and to the perforated plates or shelves of gas scrubbers.
The invention consists in constructing the tray or grid of a number of slats of an
oval contour in cross section, and in securing said slats together as hereafter described,
so that in the case of lime trays the whole or nearly the whole of the surface presented
to the gas will be a lime surface.
Reference is to be had to the accompanying drawings, forming a part of this
specification, in which figure 1 is a plan view of a fray; while figure 2 is an end view
of the same; and figure 3 a detail view of one connecting rod or bolt, both the latter
figures being drawn to a larger scale than figure 1.
A in the drawing are the several strips or slats constituting the tray or grid. These
are preferably constructed of wood and made oval in cross section and best illustrated
in figure 2. They are placed side by side a suitable distance apart and are secured in
place by two or more metal tie rods B, of any suitable dimensions which are passed
through transverse apertures in slats.
The slats A are spaced by means of interposed washers D, entered upon and
supported by the tie rods B, as shown in figure 2. Each tie rod B has a head bat
one end, and at the other end is provided with a nut which screws on the threaded
end of the rod B as illustrated in figure 3. Thus when the tie rod is passed through
the several slats, the head is brought in close contact with the outer face of one side
slat, and the nut is screwed to a firm engagement with the opposite side slat.
The washers D may be made of iron or wood or other suitable material and are
preferably of sufficient size to separate or space each slat, thereby offering no resistance
to a shovel or other device employed in cleaning the trays.
If in practice it be found desirable, the outer slats may be provided with a counter-
sink, as shown in dotted lines in figure 2, to partially receive the head or nut of the
tie rods

page_text: It will be observed that by reason of the oval contour of the slats, great strength is
imparted to the tray, and practically all lime surface is presented to the gas to be
purified. It will be further observed that the mode of connecting the slats, adds great
strength to the tray or grid; and also that any slat may be conveniently removed and
a new one substituted with but little expense. The tray is also reversible.
The tray may be employed with advantage in the process of extracting tar from
coal gas in addition to the purpose above set forth, in which event the trays are placed
one over the other with a space of two or three inches between them. Water is
allowed to drip upon the trays, and the gas finding its way through the spaces of the
trays the tar is separated from the gas by the action of the coolness and moisture
emanating from said trays. This portion of the process of purifying gas is ordinarily
known as the scrubbing boiler or tank process.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
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1. A gas purifying tray or grid, consisting of a series of spaced united slats
essentially oval in cross-section, substantially as shewn and described.
2. A gas purifying tray or grid, consisting of a series of parallel slats oval in cross-
section, a tie rod passing through the series of slats and washers carried by the said
tie-rod spacing the slats, substantially as shewn and described.
3. In a gas purifying tray or grid, the combination, with a series of parallel slats
oval in cross-section, of headed tie rods passing transversely through the said slats at,
their ends, washers carried by the said tie rods spacing the several slats, and
a lock nut screwed upon one end of each tie rod, all combined substantially as shewn
and described.
or near,
G. H. TURNBULL.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.