US1622573A

US1622573A - Coking still

Info

Publication number: US1622573A
Application number: US706020A
Authority: US
Inventors: Cross Roy
Original assignee: Gasoline Products Co Inc
Current assignee: Gasoline Products Co Inc
Priority date: 1924-04-12
Filing date: 1924-04-12
Publication date: 1927-03-29
Anticipated expiration: 1944-03-29

Description

lview of the still,v with parts in section.

Patented Mar. 29, 1927.

PATENT 1.622.573 yo lrlca.

ROY Cnossen KANSAS c rrrxr,l M Issormr,l A ssIGNon ToGAsoLINE PnoDUo'rs .com-

raNY, or NEW YORK, N.' Y., A CORPORATION' or NEW Yeux..

coxINe STILL.

Appueauon`- med ap'ru 1 2, 1924. serial Nq.- 706,026.

- This invention-relates to improvements in a qoking still, and refers more particularly to an apparatus for treatingv heavy hydrocarbons in order to distill' oil the volatile ,5 material and reduce thebottoins to petro- --leum coke.

Among the salient objects of,` the invention are,l to provide a still which eliminates the accumulation and collection of the petro- ,10 leum carbon orV coky material on the bottom of the still where, in the normal type of construction, 'it serves tok insulatethe oil from the heat of the still andreduce the stills efficiency; to provide a still in Which4 the lcarbon or coky material iscontinuously scraped from theinside surface as the still' rotates'vand supplies a means ,forcolleeting .this carbonaceous material in a removable container or basket wherein the carbonaceous substance-"is accumulated in a. loose, -dry condition; to provide more eiciently heated due to the heat conducting vanes upon its outer periphery.

In the drawings', Figa '1 is a diagrammatic side elevational Fig. 2. is a cross'sectional viewtaken along .l the line 2-2 in Fig.` 1, looking inl therdirec# tion ofthe arrow'. Referring to the drawings,1at` 1 is shown a rotatable still .supported by standards 2 and bearing upon a shaft 3. 4 is an loven or-furnace arrangement' surrounding the ro tatable still and preferably heated b vmea-ns of gas burner Vd iagrammatically'shownat 5. 6- is a carbonl basket suspended from the shaft 3 by hangers 3 which rotatably. bear 4upon the shaft. l from the still to a position shown in dotted lines at 6 by slidingr thehangers along the shaft. To .remove the .vaporized material from the still, an internally positioned openended pipe-7 is connected to the hollow portion' of the shaft shown at 8 which' terminates in an elbow Connection to the vapor- .line 49. This latter line has communication .with the condensercoil 10 in the condenser box l1, the discharge f rom the coil terminat- "ing .in the receiving'` tank- 1 2 which is equipped with a liquid level gauge 1 3 andl .aliquid drawoi valve 14.v The'still is rotated by means of the driv- -ing gears'l, mounted on 'shafts 16,' and driven. from anyv convenient source not a still which is by a scraper 21 the furnace or oven.- and The basket is removablev the still. The`shaft3 is stationary.- an the bearing 18 surrounding the vapor' line is preferably water-'cooled, although not shown so inthe drawing, as this detail is not apart of the present invention. 1

The opposite end of the still is tted with .a removable plate 19 whichr may be Slid dotted line position along the shaft 3 to the '19j in order that the -carbon basket o r con-. .tainer 6.may 'be removed "from the 'sti-ll in order to clean the carbon therefrom. ".O'n

vthe outer shell of the still is a plurality of ridges or-heat absorbing vanes designated as 20 which. upon rotation-'of the still, servey to more efliciently anduniformly 'heat its contentsdue to the increased 'surfaceBexJ posed to the heatingvgases. This-basket or container 6 extends substantially the entire length of the still in orderto catch the carbon which is scraped from the inside shell pivoted at 22 on'one edge of the. 'carbon basket. When the carbon basket has .been pushed intothe still, the

scraper is swung over so that vits blade contacts' the inner surface of the still as shown in Fig. 2.

The oil charged ,may be introduced.

through the open end of the still lor through aseparate charging'pipe not shown. When the endplate-ha'sbeen bolted in position after the still has been charged. fire is started 4in the still rotated while the oil'is being heated. -It is impor- 'tant that the level of the oilfcharged is below the' bottom fof 'the lcarbon basket in order that the carbonaceous material'collectedin the basket will not be fouled with 'the' sludgy oil lbut maybe removed in a comparativelylo'ose, dry7 state.

As the still is heated; the vapors evolved will pass off through thepipe 7, through the hollow bearing and out into the vapor line 9, being condensed. in the vcoil 10 and- `collected-'as distillate in the receiving tank 12. The heating is continued until substantially all of the volatile materialhas been I driven olii'. and the cokymaterial collected `as dry carbon .in the carbonbasket or container 6.- Theco'llection of the carbon 1s effected by scraping the deposited material from the inside of the still'into the basket by means of the scraper 21.

When thel petroleum products have been reduced to a coky mass, substantially all of which is scraped into the carbon basket, the

fire is extinguished and the still permitted to cool or is steamed out to facilitate cooling. The endplate 9 is moved backto a position shown at 19 and a carbon basket withdrawn from the still to a dotted -line position shown at 6a. When placed thus, the carbon and coky material can easily be removed while the still is yet too hot forworkmen to enter.

I The advantages of this type of construction are obvious, as it permits more eiiicient heating, eliminating the collection and acoumulat-ion of carbon on the bottom ofthe still which tends to insulate it against efficient heating. It also' supplies a means for removing the petroleum coke from the interior of a coking still without necessitating manual labor in digging .and scraping.4 the coke from the `interior shell, which is not only expensive and slow, but is disagreeable and oftentimes diliicult when the oil has been reduced to a relatively'dry product.

The construction permits the accumulation and collection of petroleum coke in a relatively loose,- flaky condition in a separate container which is easily removed from the still while the still would normally be too hot for carbon to be dug out by manual labor. This reduces th'e time in which the still is shutl down for cleaning, and greatly increases the saving, both in heat loss and labor. 'necessary for the removal of this petroleum coke.

In addition to this,- it increases the life of the still, as there is less tendency for the shell to become overheated due to the production of hot spots where carbon has collected.

'As described, the-heat absorbing vanes serve to` more evenly distribute and uniformly transmit the heat to the oil, at the same time supplying heat more rapidly due to the increased surface exposed.

Certain obvious detalls of constructionhave been eliminated in order to simplify the drawings.l It is understood, however, that the invention broadly .covers the utilization of a carbon ,containerin a rotating still whereby the petroleum carbon, or coky material deposited during the coking operation, is collected therein by continuously scraping the same from the inner surface of the still as it rotates.

I claim as my invention:

1. lnan apparatus for cokin'gpetroleum hydrocarbons, the combination with aJstill adapted to be heated to suificienttemperature to distill olf the volatile material, means. for

scraping the deposited carbonaoeous substance from the still walls, and a container supported in the still forl maintaining said removed carbonaceous material out of contact with the shell of said still, said scraping means mounted upon the container.

'2. In an apparatus for coking petroleum hydrocarbons, the combination with a still adapted to be heated to sufficient temperature l to distill oli the Volatile material, means for scraping lthe deposited carbonaceous substance from the interior of the stillpa rcmovable container positioned therein for collecting said substance` said (scraper hinged upon the container and adapted to be placed in an operable or inoperable position.

3. In an apparatus for coking petroleum hydrocarbons, the combination with a revolvscraping the deposited carbon from the inside surface of the still into the container, a support upon which the container is hung adapted to facilitate its removal from the still for dumping.

5. In an apparatus for coking petroleum hydrocarbons, the combination with arotating still mounted in a furnace, of means for removing the volatilized material,.means for scraping the deposited carbonaceous substance from the interior of the still, a support extending into said still, a container suspended therefrom for collecting the carbonaceous material, said container adapted to be moved into o r out' of the still while being suspended from said support.

6. In an apparatus for coking petroleum hydrocarbons, the combination wtih a rotating still mounted'in a'furn'ace, of means for removing the volatilized material, means for scraping the deposited carbonaceous substance from the interior of the still, a support extending into said still, a container suspended therefrom for collecting the carbonavceous material, said container adapted to be moved into or out of the still while being suspended from said support, said scraper adapted to be placed in an inoperative position when the container is removed from the still.

ROY CROSS.