US 2356653 A
Description (OCR text may contain errors)
Aug. 22, 1944. D. D. cox 2,356,653
` HURDLE WASHER l Filed Deo. 16, 1942 2 sheets-sheet4 1f FIB 1;
I HUN U Wl Il U INU! INVENTOR: l 041//5 (01,
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HURDLE WASHER Aug. 22, 1944.
Filed Dec. 16, 1942 2 sheets-sheet 2 f@ ff .illllllls ig f5 lf@ FISA.
IN VEN TOR.'
Patented Aug. 22, 1944 HURDLE WASHER' f Y :Davis D. Cox,vvFairfield, Ala., assignor-tovTennessee l Coal, 'Iron & .Railroad Companyga Ycorporation of Tennessee Application December' 16, 1'942,"Serial NO SIIGZ? Y Z Claims.
This invention relates to hurdle washers and more particularly to a filling for use in packing wet tower type scrubbers. These scrubbers are extensively used in the by-product coke and petroleum industries for the removal of a gas or vapor of a liquid miscible in all proportions with the scrubbing liquid, as illustrated by the removal of light oils from coke oven gas.
A conventional scrubber consists of a tall steel shell in which the filling is packed in layers of desired thickness. The gas to be scrubbed is admitted at the bottom and passes upwardly through the lling and leaves the top of the unit. The scrubbing medium or absorbent liquid is pumped to the top of the scrubb-er and is distributed uniformly over the top surface of the lling and ows downwardly through the same. As it comes in contact with the ascending gas, it absorbes the light oil component.
Coke, tile, wood or steel shavings, expanded metal lath and sectional wood trays have been used for packing materials. The hurdle sections are placed in layers one above the other to the desired height. In most types of lling, the open area of scrubber for the passage of gas and absorbent medium is approximately 50% of the scrubber area, and thus a high pressure drop is experienced. Increased scrubbing efliciency is obtained through breaking up the gas into more finely divided streams, increasing the absorbing wetted area of the filling, and eliminating stagnant lms of gas or liquid on the surface of the filling material.
An object of the invention is to greatly increase the wetted area of the scrubber lling.
Another object is to provide a filling having a low pressure loss therethrough.
Still another object is to increase the efficiency of the scrubber.
These and other objects will be more apparent from the following details of disclosure when read in connection with the attached drawings in which:
Fig. 1 is a sectional elevation of a scrubber embodying the present invention;
Fig. 2 is a plan showing the arrangement of hurdles in the scrubber;
Fig. 3 is a sectional view of a hurdle section;
Fig. 4 is an end View of the hurdle section and Fig. 5 is a perspective view of the arrangement of the hurdles.
Referring more particularly to the drawings, the numeral 2 indicates a vertical tower scrubber.
The gas to be cleaned enters the tower at 4, passes up through the hurdles 6 and out of the tower at 8. The scrubbing medium from the sprays lll passes down through the hurdles absorbing light oil component from the gas, and then pass-es out of the bottom of the tower.
The hurdle consists of a plurality of layers of vertical parallel plates. The rst layer of plates are laid at right angles to the I-beams I2 and each succeeding layer is laid at an angle of between 20 and 70 degrees to the layer beneath as clearly shown in Figs. 2 and 5. Each layer of hurdles consists of a plurality of sections A as best shown in Fig. 2. VEach hurdle section consists of Ia plurality of plates I4 arranged as shown in Fig. 3. As shown in Figs. 3 and 4, each plate has arcrimp or valley I6 therein. On each side of this valley there are substantially straight portions I8 and 20, having a plurality of spacers 22 thereon. Each spacer has a hole 24 therein. The portion I8 has holes 26 in the outer portion thereof and portion 20 has similar holes adjacent the valley portion. The spacers in portion I8 are formed adjacent the valley portion and those in portion 20 adjacent the edge of the plate. The spacers and holes are symmetrical with respect to the vertical center line of the plate and so formed that upon turning the top to the bottom the holes 2B will match with the holes 24.
In assembling the hurdle section the first plate is placed in position with the portion 20 lower.- most. The next plate has the portion uppermost. The third plate is arranged the same as the rst. This arrangement is continued until the entire section has been arranged as shown in Fig, 3. By this arrangement each of the spacers 22 are staggered and therefore determine the.
horizontal distance between the plates. The plates are fastened together by means of rods 28 which pass through the holes in the plates as shown. Washers 30 are welded to the ends of the rods to hold the plates in assembled position.
The operation of the hurdle is as follows: As the gas ascends through the hurdles the crimp or valley produces three changes in the direction of gas flow, as indicated by the arrows a, b, and c in Fig. 3, thus breaking up the gas stream and causing impingement against the wetted surfaces of the plates. stagnant films of gas and absorbent, and brings them into direct and intimate contact, thus obtaining maximum absorption for unit area. Since there are no horizont-al surfaces therein, there are no deposits of carbonaceous material which ordinarily clog thegas and oil passages. The vertical surfaces also enable the units to be This greatly reduces theV cleaned by steaming or washing. By making the hurdles in sections as shown in Fig. 2, they may be easily handled in assembling and one section may be replaced at a time.
While one embodiment of the invention has been shown and described, it will be apparent that other modifications and adaptations may be made without departing from the scope of the attached claims.V
I claim: y
1. A hurdle section of the class described comprising a plurality of plates, each of said plates having a valley portion centrally disposed therein and a relatively straight vertical portion on each side thereof, at least onespacer on each 15 vertical portion, the spacers of one portion being adjacent the end of the plate land the spacers of the other portion being adjacent the valley portion, the plates being arranged in vertical Y position.
parallel rows with the last named portion at the top in alternate plates 'and means for fastening the plates together.
2. A hurdle section of the class described comprising a plurality of plates, each of said plates having a valley portion centrally disposed therein and a relatitvely straight vertical portion on each side thereof, at least one spacer lon each vertical portion, the spacers of one portion being adjacent-the end of the plate and the spacers of the other portion being adjacent the valley portion, the plates being arranged in vertical parallel rows with the last named portion at the top in alternate plates, the straight portions and spacers having holes therein for receiving a rod when in assembled position, and means attached to the rod for holding the plates in assembled DAVIS D. COX.