US1119174A - Method of clarifying sugar solution. - Google Patents

Description

1,1 19,174. Patented Deo. i, 1914k gfl,

UNITED. sfrufrfns PATENT once.A

ExNsr WILHELM 4norma, OFHONOLULU, TERRITORY 'or namur, ABSIGNOB 'ro KOPKE cLAnIFIEn COMPANY, LIMITED. A CORPORATION or THE annm'romror Bewan.

METHOD 0E CLARIFYING SUGAR SOLUTION%..

To all 'whom it may concern.'4 I 4lite it known that I, ERNST W. Korus, a

- citizen of the United States, and residing at Honolulu, Territory of Hawaii, have invented certain new and useful Improvements in Methods of Clarifying Sugar Solutionsgand I do hereby declare the following to'be afull, clear, and exact description of thefinventionysueh as will enable others skilled in the art to which it appertams to make and use the same.

This invention contemplates a betterment in the art of disassociating and separating j galization to better advantage.

The method described is peculiarly advantageous when applied to the epuration of the juices extracted from sugar cane dur ing the manufacture of. sugar, a field in which centrifugal separationhas never been successfully accomplished. The invention dce-s, nevertheless, constitutev an improvement in the application of centrifugalization to the separation of liquids and suspended solids without regard to the branchoi' industry in connectionwith which it might be employed. y

In thefaccompaiiying drawings, l have illustrated a centrifugal separator especially designed to carry into practice the method herein described and claimed.

i1-the drawin' Fiffure l is an elevation. 257 D l i partly in section; and Fig. 2 is a detailed vsection of a modified constrnctionof the upr per portion of the drum and casing.

The juices expressed from sugar cane ccntain lfnany impurities which must be eliminated sooner or later during the process of obtaining the crystallized sugar, and owing to the intimate admixtnre of these impurities with the clear solutionof crystallizable sugar and the slight dill'erences existing between the specific gravities of the impurities and the clear juice, their economical separation bythe centrifugal process has not been heretofore successfully accomplished. The practical methods resorted to for clarifying the juices have involved the use of settling tanks, sand filters, filter presses, and the like, which in every case have required the juices to remain under treatment for protracted periods, subjecting the sucrose to the danger of inversion,

Speciiication of Letters Patent.

and requiring the application of heat and reagents at times when impurities have been present, and the elimination ofv these impurities has been rendered more dificult thereby.

This invention contem lates a mode of centrifugally separating t e clear ljuice from the solid impurities admixed therewith immediately upon the issuance of the juice from the expressing mill and at any time thereafter during the process of clarification whensolid impurities are present, and this in a fraction ofthe time heretofore required, minimizing the danger of inversion,

Patented Dec. 1, 1914.v Appucation inea sepzemberzs, 191i.' seriai No. 651,692.

producing a more complete clarification of the juice, and elfecting a considerable saving in time and labor. Furthermore, vby this method, a greater percentage of the Sugar content of the Original-'juice maybe economically recovered than has heretofore' been deemed practicable. A

The invention consists in the hereinafter particularly described method of subjecting the Acane juice or other fluid substance'to be clarilied, to stratification and separation by centrifugalization, and this method involves a particular mode of introducing the juice into a rotating separator by first supplying it to an ante-chamber in the rotating centrifugal. and there gradually imparting to it the angular velocity of the separator before admitting'it to the chamber in which it is to be stratified, in order that the disturbances Aincident; to the aeceleratirlij,,/,off,.v the juice to the angular velocity of thesptrrator shall not Occur in the stratifyingchamber. The method also involves themanner in which the juice iscaused to flow through the stra-tifying chamber in order that all Striation and interference of the substances ofA unlike densityshall be avoided. 'Other important features consist in the manner in which the initial introduction of the juice is effected, the mode of recovering the claried juice during the period of uninterrupted deemed advisable to describe in detail the strucfure'o'f he machine, in eonnecic with the description of the process which it is designed to carryout( Referring to thedrewiiig, a depeudi from e.. Supporting head A which is designed to admitbf' e. certain amount or' eecillation as' is usuel, in. sugpeuded centrifugal ma.- ehinesfzruil lll-lese .rods a Support anon-remt -ingiceing B. The lower par-1 of the casing -B consigeof avcasting in the'outer edge 'of which x.n-eniilr-LguterQ- is formed. Arms lower end fiafxo Sheff, Eis jourjeurnaled in -e Suitablefbeering in tlieheetl peripheral annular ring lfupengfhe spider F provides an intur-ned angeupoits lower edge. 'These inturned {langes-gend 'H form the end walls of. an funular "Stratiying chamber 'I which is adapted to veon'fain a cylindrical body ofliquid'wlien the drum G is revolving. A flange y', substantially'l.- shaped in Cross-section, is secured to the bot-toni of the drum v'Gr and forms an annular ante-chamber J opposite the outermost part of which a circuler vseriee. oiapertm'es la are providedinthe-bottom Wzill of the drum G, affording communication between the ante-chamber -J :and the stratifying chamber l5 The supply pipe supported on'llhe casin'gB passes upwardly between the arms D audt'ermiuabes in. e flat nozzle- K which lies with its mouth parallel with and et, :in :leute :ingle to the normal liquid level (indicated by dotted line .fi-:lin autechambler J While the xnficliirse is in operation, and this nozzle K discharges in the direction of rotation of the machine-7 thus laiv- -ing e flat ribbon of fluid upon the surface of the liquid in ante-chamber J. llie juice flows with all its content of me heavier solid impurities from the ente-chamber J through the apertures h into the strat-ifying chamber I, an inclinati-in given lie outer wall of .the Han'gej delects'fany mud Whieli'euds o collect thereon toward the sipertures k.

Reverting te 'the method of introducing the j"uice, a'tt'.ention is ealledtil-'lle fact that..

' :the thin, ribbon ofintr'oducel- .liquid is laid upon'the'surface of the-liquid already in.

ante-chamber- J andV does*v not ''iuimed iet-ely come int-o contactjwith any-perc of he ro` ut, las? it .uio ed, out'- yerfuntil it comes :op-

the'gnmespeed as the drum. However, tlxe collect in small quantity uponthe urffi-:ei in negre apertures /E .will give it the neeeearygeddi tional 'speed and-it villent'er =tlfie`er`tifyf iiig-ch'amberlWithout causing anylotlie currents or "disturbances vwhich would 'f present iff iqwere not already traveling :it- 8 0 liquid entering the 'sratifying ceeniber 'f" in a number of' separate Streams.: rein @hei apertures .'z. :would cause striatiofn m'tli'eV peering in the laj'ero mud which collects' in the chamber l about'- tli'e fis/all of thef drum, mid en uneven flow of lie nice through the cl'iainber would resultfltf avoid thisE I pla'eee baille' ring Le slioiitj distance. 'above che aperures end eause lli streeinsof liquid flowing inte 'chamber l through elle :iper-'lauree f tof imginge j ageinstthis ring endspread idllcmv` `ouhwurdly over the outer edge".0f -'t lie ring 11,2' where the lerel stremns are .causedjo goin and form a. tliiii cylindrical' elieetof liquid: 1,.oiif'ing ep w'u'rdlythrough t-lie {str a't'ffir chamber l The infile-ring 'exens Wit which supportig-ere l:phi-eed :it poins with-.g out the liquid in. ord-er thaizilley may 'n'tcause any disturbance Within the 'bodyfel linicl. f .The eurer edge 0f 4(alie bafering L should be accurately concentric -Witli the a-XiS-'o'f-' mini-ion und should be so siceel from wall of the drum their.. tlie rising cylindrical' film of liquid ent-ers tlie'main body of ille!v liquid in the Strelifying chamber I and in; passim@ ilieretlirci u zndergoes. a; sepere-r. tion o1" it.: censtituents of different densities, v the heavier moving eutwerdljsfv and the lighter inwardly, without interference 111,-

At the upper edge of the rotating 'drum (rv the inturuedflange g is preferably 'provide'd with aclmnnel M the. .lo".ver Wall of' project-s inwardly sirtlier than-'the flange-9 1 and constitutes :iy dex-'ni for holding 'beck any e lighter impurities viliiehvmignt P nd their" way into the stratiyingchamber lq; In the" practice of clfiriying sugareelutionfslicnj lighter Qarticlelsrare few'. zindjiheyueually dada the@ Quim? .l Sei n man; inging the unam-at substancs suspe of centrxfuga s a br fn m- 5 trod 'action ,u

ing

10 tha Stmtify whazam th the paglia L @ed Th 15 muze in, t.

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