US1669795A - Liquid and gas contact apparatus - Google Patents

Description

May 15.- 1928.

F. H. WAGNER v LIQUID AND GAS CONTACT APPARATUS I ma Way/7 1;

Filed June 17, 1925 Patented May 15, 1928.

1,669,795 UNITEDSTATES PATENT OFFICE.

IBEDEDICI E. WAGNER, OF BALTIMORE, MARYLAND, ASSIGNOLR TO THE BARTLETT EAYWABD COMPANY, OF BALTIMORE, MARYLAND, A CORPORATION OF MARY- LAND.

LIQUID AND GAS CONTACT APPARATUS.

Application filed June 17, 1925. Serial No. 37,795.

This invention relates to an improved form of liquid and gas contact apparatus and pertains more particularly to thattype known inthe arts as a'Feld scrubber.

. The main object of the present invention is to provide means whereby a more intimate and prolonged contact is had between the gas and liquid than obtains under the Feld scrubber of usual type as shown for instance in Patent Number 983,037.

A structure embodying my invention is illustrated in the annexed drawings, where- Fig. 1 is a vertical sectional elevation of the scrubber;

Fig. 2 an enlarged detail sectional view; and

Fig. 3 a plan view of a portion of the perforate pan or diaphragm employed to effect a dispersion of the liquid other than that effected by the spraying means.

In the drawings, 1 denotes the shell or casing provided at its base with a gas inlet port 2 and at its upperv end with a gas exit port 3. Port 3 is in communication with a moisture eliminator chamber 4 into which the gas passes from the casing through a centrally disposed port 5. A return ipe 6 is provided for returning liquid rom v chamber 4 to the interior of the casing.

Extendingx upwardly through the casing and throug t e liquid containing receptacles 7 is a shaft 8, which latter is designed to be rotated by any suitable means (not shown). A li uid seal 9 or packing is provided for the s aft at the lower end of the casing to prevent outflow of gas therearound.

Two ans or receptacles 7 are shown but it is to 'e understood that a greater or less number may be employed according to the operation being undertaken. Inasmuch as each pan and its accessories are alike in form and operation, only one will be described.

The an, as will be seen, is spaced away from t e interior of the casing and is designed to hold the liquid to be sprayed. pipe 10 affords means for introducing liquid to the uppermost panand overflow of the liquid will fill those below, though of course additional supply pipes may be employed. .A draw-01f 11 is provided at the bottom of th pparatus.

ured to shaft 8 is a series of inverted truncated cone-shaped members 12 spaced apart as in the well-known Feld scrubber, the cones dipping into the liquid within the receptacles and serving as they are rotated to elevate the liquid and spray it outwardly through the perforations formed in the upper portion of the outermost conical member.

The sprayed liquid thus thrown against the inner face of the casing runs down onto a perforated plate or diaphragm 13 which, together with the upstanding collar 14 carried at its inner edge, forms'in effect a pan. Said collar as will be seen stands close to but not in contact with the outermost cone so as .to preclude the upward passa e of any appreciable amount of gas at suc point.

The perforations 15 in plate 13 are small and somewhat closely spaced and are formed in that portion which overlies the rece tacle 7. $urrounding each opening on the under face of the plate is a de ending lip or teat 15? which prevents the iquid from coalescing on the under face of the plate and running off in streams. Pipes 16 extend through the plate, the upper ends whereof project above the plate while the lower ends pass down into the liquid in the receptacle. and are sealed by the liquid against the upward passage of gas therethrough. The pipes in efiect determine the depth of liquid which is maintained on plate '13, or in other words, determine the liquid head which exists over the openings or perforations 15.

To prevent the sprayed liquid from surging back from the casing wall over the plate, I provide a surge plate 17, the lower edge whereof is serrated. Said plate rests upon plate 13, being spaced away from the wall of the casin and preferably s aced away from the per orations 15 as best s own in Fig. 3.

e In operation, upon rotation of shaft 8 and elements 12, the liquid in the receptacle will be drawn up and sprayed outwardly as indicated in the drawings. The sprayed liquid impinging on the casing will rundown onto the plate 13, or the pan having the perforate bottom 13 and will cover or fill the same to a depth equal to the hei ht of the upper end of the drain pipe %or pipes) 16. The liquid of course passes through the perforations i5 and this in counter-flow to upwardly moving gas. he

gas therefore comes into contact with the preventin liquid as it passes in the form of drops from the bottom of the plate into the receptacle; into contact with the film of liquid passing through the perforations; and likewise bubbles up through the layer of liquid maintained on plate 13. After passing through such liquid the gas passes through the sprayed liquid, which fills the space in the casing immediately above the pan-like member or diaphragm. Thus it will be seen that in addition to passing through the spray the gas is forced into intimate con tact with the liquid in a more or less divided condition with the result that a full absorbent action is obtained with but small addition of back pressure.

The gas finally passes through opening 5 into the eliminator chamber 4, through the same in contact with the eliminator elements such as plates 4, and finally to the exhaust port 3. I

While I have shown umping and spraying elements of the wel known Feld type any means may be employed to effectuate the umping and spraying of the liquid.

hat is claimed is:

1. In an apparatus of the character specified, the combination of a casing; a receptacle mounted therein in spaced relation to the wall of the casing; means for drawing a liquid from said receptacle and spraying the same outwardly; a pan-like member arranged to receive the sprayed liquid; said member having a series of perforations formed in the bottom thereof whereby the liquid and as may pass in counter-current through sai openings; and means associated with the lower portions of said openings for the liquid which passes therethrough rom coalescing on the under-face of said pan-like member.

2. In an apparatus of the character specitied, the combination of a casing; a receptacle mounted therein in spaced relation to the wall of the casing; means for drawing a liquid from said receptacle and spraying the same outwardly toward the wall of the easing; a pan-like member located above the rece tacle and having a perforate bottom to receive the return flow of the sprayed liquid; means located upon the under surface of said pan-like member for preventing the liquid which flows through the perforations from coalescing upon the under surface of said pan-like member; and means serving to maintain the liquid in the pan-like member at a given depth or level.

3. In an apparatus of the character specified, the com ination of a casing; a receptacle mounted therein in spaced relation to the wall of the casing; means for drawing a liquid from said receptacle and spraying the same outwardly toward the wall of the cas ing; a pan-like member having a perforate bottom to receive the return flow of the sprayed liquid; said member being located above the receptacle; :1 depending lip surrounding each of the perforations formed in the bottom of the pan-like member; and an overflow pipe extending from a point above the perforated bottom down and into the receptacle.

4. In an apparatus of the character specified, the combination of a casing; a shaft extending upwardly therethrough; a series of inverted truncated cones carried by said shaft; a receptacle into which the lower ends of said cones extend; an annular panlike member extending inwardly from the wall of the casing, the inner edge whereof surrounds the outermost cone but free of contact therewith the bottom of the pan being provided with a series of perforations and said pan being located above the receptacle; means located on the underside of said pan-like member and associated with the perforations formed therein to prevent liquid which passes through the perforations from coalescing on the under surface of said pan-like member; and an overflow pipe extending from a point above the perforated bottom down and into the receptacle.

5. In an apparatus of the character specified, the combination of a casing; a shaft extending upwardly therethrough; a series of inverted truncated cones carried by said shaft adapted to pump and spray liquid; a receptacle into which the lower ends of said cones extend; an annular pan-like member extending inwardly from the wall of the casing above the receptacle, the inner edge whereof surrounds the outermost cone but free of contact therewith, the bottom of the pan being provided with a series of perforations; an overflow pipe extending from a point above the perforated bottom down and into the receptacle; means located on the underside of said pan-like member and associated with the perforations formed therein to prevent liquid which passes through the perforations from coalescing on the under surface of said pan-like member; and means for preventing the sprayed liquid from surging in its re-flow back and over the perforated bottom.

6. In an apparatus of the character specified. theeombination of a casing; a shaft extending upwardly therethrough: a series of inverted truncated cones carried by said shaft; a receptacle into which the lower ends of said cones extend: an annular pan-like member extending inwardly from the wall of the casing. the inner edge whereof surrounds the outermost cone but free of contact therewith. the bottom of the pan being provided with a series of perforations and said pan being located above the receptacle; and an overflow pipe extending from a oint above the perforated bottom down an into the receptacle.

I shaft adapted to means 10 whereof surrounds the outermost cone but free of contact therewith, the bottom of the tions;

pan being provided with a series of perforaan overflow pipe extend from a point above the perforated bottom down and into the receptacle; and means for preventing the sprayed liquid from surging in its re-flow back and over the perforated bottom.

In testimony whereof I have signed my name to this specification.

FREDERICK H. WAGNER.

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