US1116578A - Still. - Google Patents

Description

A. QBUNGAN.

' STILL.

APPLICATION FILED JUNE 10, 1913.

Patented Nov. 10,

2 SHBETSSHEET l WW, 3W, WM.

A G DUNCAN,

STILL.

APPLIIGATIOII FILED mm: 16, 1913.

2 SHEETS-SHEET 2.

vn W""" Be it known that I, AL XANDER I UNITED STATES AT NT OFFICE.

ALEXANDER G. DUNCAN, OI JULIET, ILLINOIS.

l s ecifi ati n of Iietters Patent. Application filed-June mime; Serial No. 773,941.

Patented Nov. 10, 1914.

Toallr whom it may concern G. Doncan .a citizen of the United States, residing at joliet, in the county of Will and State of 'Illinois, have invented certain new and useful Improvements in Stills, of which the followingis a specification.

My "invention relates to stills, and refers particularly, though not exclusively,- to stills which are used tfor the'purpose of abstract-v 1 ing ammonia from ammoniaca-l 1i uors'.

1 cokeovens. In theprocessio from the coal, this gas containing aconsiden invention is'especially use ulforthe purification of gas generatedbfyf-byglproduct it'is Well known that a rich gasisdrivenbfi scrubbed in order to free it 'fromvarious imlpurities, and the water used for the scrub-' ing operation absorbs a large quantity of: the gaseous ammonia. This solution isthen "heated with steam inflaz', still so that theunimonia is driven off, then condensed andused for various well known purposes in the zontal partition to ts. The stills heretofore use have been open to -various objections. They have usually been constructed with a- 'plurality' e f-horizontally-dispo'sed partitions, each'of which contains one or more gas (steam) inlet openings suitably covered by bells or hoods, and also one or more liquid outlet t' 'openings.

The liquor from which the ammonia is to be extracted is introduced at the top of the still and passes downwardly from one horianother. At the same time steam is introduced at the'bottom' of the'still and passes upwardly through the belied gas inlet openings in the various partitions.v This steam forces its way through 5 the liquid surrounding the bells, and serves obliged to flow in a substantiiilly straightpath from to heat-the-liquid, thereby expelling ammonia, which passes upwar 1y .Wit-hwthesteamQ It isthe object of my invention to over come the various difficulties above" men t ioned, and I accomplish this result by con-1 structing each'of the hgrizgntally disposed partitions so that the ammoniacal liquor is one side of the partition 'toflthe described hereafter,

ngicoal.

securely held in position but may readily be removed. In order to obtain ready access to the bells and various other interior parts oi the still, I also provide openings in the sides of the still, these openings being nor- 1 mally sealed by suitable closures.

' These and other objects of my invention Wlll bemorereadily understood by reference to theaccompanying drawings, which show a preferred embodiment of my improvemerits, and in which Figuredis a 'side'elevation and partial f verticalseetion' through my improved still; Fig. .2- is 1 a fragmentary vertical section 1' through a portiono-f my still, this section 1 being taken at a right-angle to that shown 1 in Fig. 1 rand Fig. 3 is a-fragmentary plan iof oneof the sections of which my still is composed. y The still is provided with abase 10, having therein asteam inlet opening 11 and a ,w'aste liquor outlet l2. Supported oii the btislO and extending upwardly therefrom are a pluralityof still sections 13 One of closures 17. The closures 17, however, may readily be removed in order togiveaccess- 1 to theinside of the still section. As most clearly shown in Figs. 2 and 3,

@ each of the still sections is preferably square or rectangular, and is'provide'd with one or more gas inlet openings 18 which arebound" a long and narrow slot, and is covered with the bell 20, which extends downwardly over tween the extending fbells 20 engages an obliquely-disposed lock 26,, which engages the obliquely-disposed end of thebell on the opposite side. v *The horizontally-disposed partition 28 of ed by the upstanding flanges 19.* Eachfof the openings 18 is preferably in the form of the flange 191 The bell 2.9 is provided with *supporting'lugs 21, but a' space 22 is left he;

flange 19 and the: downwardlyflange 23 of each bellas best ,i shown in Fig. 3. At one end, each ofthe 105 ing surface 24 preferably formed int'egral' with the sealingwall'25l Theoppositeend of each bell itheld in position by thewe'dge surface 27 of the web' 27*. on one side and th the sections 14 of Whichthe still is composed is" of special construction,"thenpurposw-ofk which will be described hereafter.- Each of ithe still sections 13 is,- provided-withi the y flanges 15 by meansofwhich it is fastened by bolts or otherwise tdthe adjacent sections; a :In the side Walls of each section 13 are 'aper tures16 which are normally closed by the.

each of the still sections 13 has toward one side thereof the sealingwall previously mentioned, and toward the o posite side the. damming wall 29, connecte wall of the section .b' the webs 29'. Imme with-the side diatelyadjacent tot e darnining wall 29 section 13.

i. i l

an inletopeni'ng or 'slot 33, a

f 15 la assembling the still the still ctions-13 are so placed that the outlet opening 3070fonegsection registers with the inlet opening- 33 of the section fnext below j The San section is p mu' lygissiititiia is preferably of somewhat greater E. height than the otherstillsections .13'ofwhich the still is oonstructed. It is ovidedwith the gas inlet openings 34 m .the; bells 35 of similar construction ito. those: used. connection with; the. other I still sections; but preferably somewhat larger. .This' section I s provided with .a -'co'nduit; 36; havin the tion ffiQ -l ii elductliquidtherefrom t0- the still section .1nlet opening 37 which re outlet 0 eningBO-ofthestill 30 mediate y above thestill lsection 214; f Thie ar at l and is p we l: no n enema pipIe-ISS is also-adapted for ;connece lime tan-k -and ,.serves to conthrough theopening39 in the latter; ,=The uppermost stillgsection 13 has coma; I

' municating .therewithathei pipe 40,- which'--.; 40-

i from which ammonia'iis' 120139,? extracted;

introduces; to; the: still; ection the liquor.

' This uppermost section is covered by the cap 41 having theoutlet42, which prefery wm at sfv th en;mm niwe v denser. t

- Having of, my improved still,. its operationmay, now

' be readily understood: "The armnoniacal liquor is first introduced: to theiiplper still section 13 throughthe' pipe 40. e liquor rises. in the left-hand portion ioztrthis section (indicated in 'Fi 2) until it mat a; level with thenppere go of thesealing wall 25 The liquor then overflows this sealin wall I theapartition 28 until itreaches they'dama passesto the right .over. the sur ace ofanted; The H vfists=7m1ti-1 it rea e s-the upper edge 0 the damming wall and then overflows: and passes intoth;

liquid outlet opening 30.: It .will be evident that-the level oislirtuor maintained inthe e of the. height of'the l pper edge, of the damming wall'29. @Th' still section 13 will lower edge ofv the flange 23.,of the-hell 20 being w e r e srefafi e i Wiy form I steam orga' passing upwardly throu h the openings. 18 must pass through the iquor contained in the still section. The li uor ...5assing throu lifthe outlet opening 30 ows ownwardly t rough the inlet .opening 33 I into the next lower still section 13,. this the out-let opening-30,'which referably air-f tends completely across one si set each still I I j the sealing wall 31 is at a lower, level than I I of Ithefstillseetion at'which' thegsealingywall 25;. is located there is also -l'a sealing wall-fil conn cted'to the side of the still. section'hythee-webs 32, thus liquor rising until it reaches the upper edge of the sealing .wa1l25. The lower edge of the upper edge of the sealing wall.. 25,

the interior of the still section to outlet openin'g30 of the next higher see- I tion. 1 The liquor -*then' flows through successive still sections '13 in the manner first descrihedin connection with the 11 per sec 'tion; The liquor. enterin the opening 37 of the conduit 36 in thesti 1 section 14 passes I tothe'limetank the manner previously described, where :the liquor; as is well known; is 'subjectedto 'htmt, whichv serves to facilitate the exp'ulsion. of ammonia from, the

through the waste .liquor outlet 12. in the sal sm n While.theliquor is flowing through the 3 ammoniacal liquor; vThe liquor mixed with '1 i acertain. percentage of lime returns to the still sect-ion 14,; through the-pipe 38 and-the j opening 39;;passes through the outlet open- 1 5 ing 30 of section; and then passes sues; fcessively -through the still sections 13 below 7 the section l'iiin the manner previously de II I I 'scrib'ed.; l The; liquor finally-passes out p tfifii ds tank, s h as s 5 .lisuallyeemployed inp o n nj "with" still in the manner just described,'the steam. ,1

, introducedthrough thesteam inlet 11 passes upwardly-through.the openings lS m-the lowermost still section 13., Theseopeningsrf 18 preferably. have their axes at 'substantiallya right-angle to the axes of the 0 lugs '30 and 33.1 By the action of the fills 20=,this;,steam .is' forced through I the ammoniacalliquor adjacent to said bells; and

- servestoheat said liquor, thereby expellingammonia therefrom, this gaseous ammonia. -passingupwardly with the steam.- On ac-- .countof the. flow of the liquor from one side I 'fofi each still sectiont'o' the other, fresh liquor; is constantly presented forthe action of the steam, and .for this reason the. expulsion of anunoniain my still is very efliciently performed. M As previously described,.the steam passing, .j upwardly and carrying ammonia with it can only. pass through the gas inlet I openingslS on .account of the fact that the. 1-.

liquid 1nlet openings-33 are efficiently sealed reaching the uppermost still sectior 13 pass ammonia condenserJ.

.. When it is desiredto remove oneffof v the by the joint action of the sealing walls 25" and 31.-- Thesteam and .ammonia'after -hells 20 it is only. necessary to first remove one ofthe closures 17, then withdraw the.

wedge 26,- after which the bell mayreadily- -i [game tion comprising a horizontally-disposed pen tition having a liquid outlet opening at one side and a dammin'g wall adjacent said opening, a sealing wall spaced apart from the. side wall of said section on the side opposite said outlet opening and having its lower edge clear of said partition, thereby forming a liquid inlet opening, the liquid inlet opening of each section registering with the liquid outlet opening of the section next above, and a second sealing wall extendin upwardly from the partition of each of sai sections in proximity to said first sealing wall and having its upper edge on a higher level than the lower edge of the first sealing wall, whereby a liquid seal is formed by the liquid passing into each section throu h said liquid inlet opening, substantially as escribed. v

2. In a still, the combination of a plurality of substantially rectangular still sections one above another, each section comprising a horizontally-disposed partition having an elongated liquid outlet opening atone side thereof and a dammin wall adjacent said opening, a sealin wal spaced apart from and of 'substantia y the same length as the side wall of said section on the sideopposite ower edge clear of said partition, thereby formingan elongated liquid inlet openmg, the

liquid inlet opening ofleach section registering with a section next above,

the liquid outlet opening of the and a second sealmgwall extending u wardly from the partition of each of sai sections, said second sealin wall being substantiall arallel with said first sealing wall an l the liquid outlet opening of said ,section, the upper edge of said second sealing wall be ing at a higher level than the lower edge of the first sealing wall, whereb a llquid seal will be formed when liqui flows into said section through said inlet liquid open mg, substantially as described.

3. In a still, the combination of a plurality of still sections one above another, each section comprising a horizontally-disposed partition having a liquid outlet opening toward one side and a gas inlet opening, a damming wall adjacent said liquid outlet opening, a sealing wall spaced apart from the side wall of said section onthe side opposite said outlet opening and having its lower edge clear of "said partition, theresealing ocated nearer to by liming a liquid inlet opening, the liquid inlet opening of each section registering with the liquid outletopeniag of the section next"-aho ve,and a second eealin wall extendin upwardly from the partition ofeach o f sai' sections in proximity to said first sealing wall and having its a peredge on a higher level than the lower of the first sealingwall, whereby a liquid and is formed by "the liquid paesin into each section through said liquid 1 et opening,- substantially as described; v

ulna stilh the combination of'aplural ity of substantially rectangular still sections Lone above another, each sectioncomprhsing horizontally-disposed partition having an elongated liquid outlet opening at one side thereof and an elongated gas inlet opening having its axis at substantially a right-angle to the axis of said liquid outlet 0 suing, a damming wall adjacent said liqui outlet opening, whereby the liquid in said section may be maintained at a predetermined height, means for forcin gas introduced through said inlet opening through the liquid in said section, a sealing wall spaced apart from and of substantially the same length as the side wall of said section on the side opposite said outlet opening, the lower edge of said sealing wall being clear of said partition,

thereby forming an elongated liquid inlet opening, the liquid inlet openin of each section registering with. the liquid outlet opening of the section next above, and a second sealin wall extending upwardly from the partition of each of said sections, said second sealing wall being substantially parallel with said first sealin wall and located nearer to the liquid out et opening of said section, the upper edge of said second Well being at a higher level than the lower edge of the first sealing wall, whereby a liquid seal will be formed when liquid flows into said section through said liquid inlet opening, substantially as described.

5. In a still, the combination of a plural ity of still sections one above another, each section having a horizontally-disposed parone above another, each section comprising a horizontally-disposed partition having an elongated gas inlet opening. ;therein, an upwardly extending flange surrounding said openin a bell above said openin the lower edge c said bell'extending to a ower'level hm up?Hr d Placid-flare losses means on said partition engaged by, one end off'said bell,v and readily removable wed e means for securing thelop osite end of said bell to said partition, su stantially as described.

7. In a still, the combination of a plural-' ity of substantially rectangularstill sections one above another, each section having an opening in its side'fwall, readily removable means for closing'sald opening, each of said sections comprismg'a horizontall -disposed partition having an elongated gas mlet openmgtherem, upwardly extending flange n i pza surrounding said opening; a bell aboveesaid opening, the lower edgeof said bell extend- 15 ing to a lower level than the upper edge at said flan e, locking means on said artition engaged y one end of said bell, an readily removable wedge means vfor securing the opposite end of said bell to said partition, 20

substantially as described. 7 h I I 1 AL XAN E DUNCAN. Witnesses: .w

THOMAS J. SAMPsoN,

;WILBUR C. FRY, Jr.

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