US1896245A - Dephlegmator - Google Patents

Description

R. E. NAGEL DEPHLEGMATOR Fi1edJan.'9, 1928 Patented Feb. '7, 1933 n nonnnr 'n NAGEL' on CHICAGO; inn'moisf ASSIGNOR' l'ro Umvnnsan on. :enontr'czrs' on cmcaoo, 1 LLrNoi s, A', oonroRa'rIoN on SOUTH-:DAKOTA p pnn'nnncm'ron v j n Applica/19a nieu *I innmy` 9', 192e. seriali1 no.. 245,388,

Thisfinvention refers to improvements inv dephlegmators and refers', more particularly,

., to' a dephlegmator.' suitable for'use in the'i Y'cracking of sulphur containing hydrocarbon' 5 oils.- Inpthe commercial operation of crack-j ing plants, great difficulty is experienced inf. the corrosion of the dephle mator orreluX; condensers and particularly1 ln-thelower por# tion of the dephlegmators, i. fe.tliat porti-ont 10 which is in lcontact with the hottest vaporslj This corrosion *not onlyrv materially lessenstheflife ofthe'dephlegmatonbut whereftlie-deoperate. .p l sion ision the innerfside of the dephlegma'f -tor, the dephlegmator'. may be weakened to` 'sive effect of sulphur containing oils in the cracking of the same. To this end, I provide the inner side of the dephlegmator `and gen'- erally it may be sufficient to provide only the lower portion of the inner wall of thev de` phlegmatorwith what may 'be termed a floating liner. This liner is formed of some -metal more able to withstand the effect of corrosion than the steel 'shell vforming the main body of the dephlegmator; for exam.

ple, the liner may be made of a chromium metalor chromium nickel steel or the like, Thus, inasmuch as the liner will have a different co-eiiicient of expansion-than the main body of the shell of the dephlegmator, provision must be made for 1permitting its expansion independent of t e expansion and contraction'of the steel shell itself. ,This liner need not he of as great a thickness as the main body of the she l itself, but it is desirable that provision be made to prevent the vapors from passing between the outer wall of the liner and the .inner wall of the main shell of the dephlegmator. Accordingly, between the two, I insert a vapor proof packing in such a way as to prevent any vapors seeping in between the walls, but 50 without interfering with the independent `main f-shel'l: ofthe 'cylindrical dep le'gmator provied" with vapor inlet pipe 2, vapor outlet y ,conduit'j and" condensate' draw-ofi pipe 4. phlegmator is under lsubs't'antial";"pressure,' so weakens it as ,tof make it dan erouslto MOIeVr,--n8.SmUCh ist e C'II0.withstandcorrosion, 'as` heretofore stated.

j Thelower 'end lof the liner'is-preferably pro- 'videdjwitha closure cap-6, which ma the danger point vwithout there being anyv exterior evidence of suchweakening. The.` 20 result has been not only disastrous fires, but' f loss of life. The present invention is 'defsigned to reduce to a minimum Vthecor'rocontractionvandifexpansion v,the shell and lin-er relative to-Ieachother. v InI the' aecompanyingd'rawing, Fig. 1 is alvertica'l"seetional1-view ofv a dephlegmator `shellfequjpped with mylinvention and Fig. 2

1s a:hrnizonta'l:v cfross rsectional view 'on line ,Referringfto.thedrawing 1 d'esi the vVvVithin the dephlegmatoris mounted. a liner 5,:whichjmay,l lie-formed of a-metal able tol be formed as integral with the liner, if desired, and this cap 6, in -turn, has a non-corrosive pipe extension 7'th1'ough which the reiux `condensate asses'. Theliner 5 is preferably vwelded to t e innerwall ot the shell at its 2lowerfend, as shown at 8,but at its upper end free to expand and contract. In order to insure the upper end of the liner being in fixed position at all times relative to the cylinder wall, I provide a plurality'of circumferentially disposed holding brackets 9, as shown. The external diameter of the liner is such that it is spaced slightly .away from the dephlegmator wall and in this annular space, I insert asuitable filler, as, for example, a Y plastic iller, for example, a paste of graphite and lead. Also in the space between the bottom plate 6 and the lower end of the shell, I insert under pressure a filler of similar paste, as shown at 10. Preferablybetween the upper end of the annular liner and the brackets, I insert asbestos packing, as shown at 11. Care should be taken to so force the packing in the annular space between the liner and dephlegmator wall as to insure against leakage of any' vapors in this space. The vapor nozzle 2 may also be provided with a similar internal liner 12 spaced from the walls of the nozzle and I insert between the. inner wall of the ,nozzle and the outer wall of the liner 12 similar packing 13. In order 'zo i so'l ture 14, opposite the nozzle. The end of the I liner 12 must lie flush against the .wall ofthe liner 5, so as to form a tight Joint against which the packing 13 may be forced without leakage.

I have shown the invention as applied to a dephlegmator for a cracking plant but, of

course, this same idea may be embodied, for

example, in the expansion chamber, or any other chambers subJect to the corrosive action of Aoil vapors.

I-claim as my invention:

An apparatus of the character described comprising a chamber, a liner of non-corrosive material Within said chamber and spaced from the interior Wall thereof, the lower portion of said liner being fixed to the interior wall of said chamber and its upper end being free to expand and contract independently of said chamber, and means for preventin vapors from entering the space between said liner and the interior wall of said cham- ``R0BERT E. NAGEL.

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