US1912640A - Apparatus for treating oils - Google Patents

Description

June 6, 1933. Q HUFF 1,912,640

APPARATUS FOR TREATING OILS Original Filed Oct. 18, 1923 1777522 307'." [yin (22? 6.125 52%?) Patented June 6, 1933 UNITED STATES PATEN'I? OFFICE LYMAN o. err, on CHICAGO, ILLINOIS, AssIcnOn ro UNIVERSAL OIL rnonnc'rs COMPANY, or CHICAGO, ILLINOIS, A CORPORATION OF scum DAKOTA APPARATUS FOR TREATING- OILS Application filed October 18, 1923, Serial No. 669,251. Renewed July 8, 1929.

This invention relates to an apparatus for treating oils, and refers more particularly to the removal of solids or substantial solids from the interior of a dephlegmator, expan- 5 sion chamber or still.

In the cracking of hydrocarbon Oils, it has been found thatretarding of the speed with which the vapors and oil flow, aids material- 1 in the reaction of the material treated.

(Tue of the mechanical means now in use is a dephlegmator provided with a series of pans arranged one above the other in alternate fashion. In other words, the outer edge of the top pan will overlap the circular edge of 16 the pan next below so that the overflow will fall from the top to the next, etc. This arrangement .gan be carried out throughout the height of the dephlegmator.

Heretofore, at the end of every few runs, 20 it has been necessary to remove the top of the dephlegmator and take out the pans for cleaning and removing any carbon, sand, salt or other foreign solid or substantially solid materials.

I have discovered that after the run is completed, by the introduction of steam, benzol or some such suitable solvent, these pans can be cleaned without removing them from the chamber. This is accomplished bypositioning a vertical feed pipe for the cleaning fluid in the chamber, which terminates just above the lowest pan. The opposite end of this pipe may be located outside and above the top and connected with the source of supply for the cleaning agent. Small. discharge pipes of varying length to correspond with the position of the pans, are interposed in this vertical feed pipe just above each pan. The

whole can be rotated through an angle of sub- 1 tached to the vertical pipe.

Fig. 1 is a vertical cross sectional view of a dephlegmator equipped with my invention.

Fig. 2 is a cross sectional detail showing the arrangement of the vertical feed pipe and the outlets to the pans.

Referring in detail to the drawing, 1 designates a vertical dephlegmator for use in the cracking of hydrocarbon oils. This dephlegmator is of the usual type, having rounded stantially 360 by means of a hand wheel attop cap portion 2, which can be removed if necessary, and roundedbottom portion 13.

The bottom portion 3 terminates in a reflux drawofli' 4. The vapors are forced into the bottom of the dephlegmator, through the va-c5 por inlet pipe 5. Raw oil may be introduced through the raw oil inlet pipe 6, and pressure distillate through the pipe 7, both of which may be used as temperature controlling or cooling mediums. Vapors may be drawn ofl'i through vapor outlet pipe 8. In the interior of the dephlegmator are positioned a plurality of small and large imperforate pans 9 and 10 of different diameters. The pans are held in place by vertical stay rods (notc shown) in the usual manner.

Referring now to the feature of the invention, I provide a vertical feedpipe'll for the cleaning fluid extending substantially down the center of the dephlegmator, which mayl' terminatejust above the lowest pan, as shown at 12. Theupper extremity of this vertical pipe 11 terminates in a swivel 13. The extension 14 beyond the swivel'13 is connected to the source of cleaning agent sn ply, such as'* steam, distillate, benzol, etc.- valve 115 is interposed in theupper portion ofthe pipe for regulatin g the amount and pressure of the cleaning material. T f

Connected to the pipe 11 and located above. each pan are a plurality. of small outletpipes 16 and 17 of varying lengths, which may be screw-threaded or welded into the pipe 11 as shown at 18 to facilitate their easy removal. The arrangement is such that a smaller pipe't 35 16 will be directly above the pan 9 of smaller diameter while pipe 17 is long enough to bring itsoutlet ,overlthe pan 10. I may note here that the outer edges of the pans of smaller diameter overlap theinner circumference of; 9

the pans of larger diameter. 1

'These outlet pipes 16 and 17 areadapted to be rotated through an angle ofsubstantiailly 360 by means of the hand wheel 19. The stufling gland 20 may be provided ail-4 jacentthe hand wheel 19.. It will be noted that the vapor outlet 8 terminates in a T 21, upon which the base portion of the stuffing gland 2O rests.

The operation is as follows: After a run isii completed the dephlegmator is allowed to cool. Deposited on the pans there will be a certain amount of earthy matter, carbon and sludge. Steam in this instance, may be introduced under say pounds pressure, into the pipe 11, the valve 15 being open. The steam will be sprayed onto the surface of the pans through the outlet pipes 16 and 17, and the earthy matter deposited thereon quickly and easily removed. By rotating the hand wheel 19 through an arc of slightly less than 360 and back again, the steam is forced onto the entire surface of the pans, thoroughly cleaning them and removing the foreign matter. I have illustrated my invention using steam as the cleaning agent, but it is obvious as pointed out, that other cleaning agents can be used.

I claim as my invention:

1. In an apparatus for removing solid or semi-solid residue deposited on the baflies of a dephlegmator used in an oil cracking system, the combination with a main feeding means communicating with the interior of the dephlegmator, outlet pipes connected thereto discharging above the individual bafiies, means for introducing a cleaning agent through the feeding means and outlets, and means for rotating said feeding means to project the cleaning fluid on the entire surface of the baflies.

- 2. An apparatus for removing carbonaceous deposits from the baflies of a dephlegmating column employed in an oil cracking system comprising a main supply conduit centrally positioned within the interior of the dep'hlegmating column, a plurality of outlet pipes of varying length connected to said main supply conduit arranged to discharge a cleaning fluid against the surface of each bafiie, the length of said outlet pipes varying with respect to the size of the baflles associated therewith, and means for admitting a cleaning agent to said conduit.

3. In a dephlegmator of an oil cracking apparatus comprising a shell having a Vapor inlet and outlet, an inlet and outlet for liquid, and a plurality of baflles adapted to retard the passage of vapors therethrough, the improvement which comprises in combination therewith, means for introducing a cleaning fluid to the interior of said dephlegmator, means for directing jets of said fluid against said baflles',-and means for moving'saiddirecting means operative from the exterior thereof to cause said jets to sweep different portions of the surface of the baflies against which they are directed. I

LYMAN C. HUFF.

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