US1789021A - Cooling apparatus for pulverulent or granular material - Google Patents

Description

L. D. PARKER Jan. 13,11931.

COOLING APPARATUS FOR PULVERULENT OR GRANULAR MATERIAL Filed Sept. 12, 1929 Patented Jan. `13, -1931 j Y nIoNEL DooGLAs PARKER, oF BAItiaovvp-Ii-QFU-nnns's, nNeILAI\In-nss1eivon To'vI'cKERs- ,AnMsTRoNGs LIMITED, on Lonnoir; generano, A COMPANY or GREAT BRITAIN y .cooLIIlrGlAIfrARATUs roitrULvEnULENT 'ora calamiteit MATERIAL,

'Application September A12, lffserial No.y

l The present invention relates to' coolingf apparatus I for pulverulent kor granular l material and is particularly, although not exclusively, applicable in connection with. the manufacture ofvfcement. Then ,f rindingfce-` ment --to a degreeiof Vlinenessisulici'ent to e n' surerapid-hardening qualities heat is evolved and it4 is 'necessaryl thatthe :cement shall be cooledon its' delivery frein the' grindingmill.`

Hitherto this operation has been performed ,by a cooler constitutingapparatus distinct from the grinding mill. This, however necessitates a separate handling koperationandl requires the provision of increased space besides augmentingthe cost, and it is the main object of the present invention to overcomey i these disadvantages by combining the necessary cooling apparatus with the grinding mill. l j Y Y According to the invention the material'to be cooled on delivery from the grinding mill is passed througha number of tubes, cylinders or chambers of any suitable shape, which are subjected to the action of a cooling liquid passed through a jacket or sprayed or other- Y wise applied to the external surface yof each tube or chamber. The construction is such l that the cooling tubes orrchambers are attached'to or associated with the grinding mill so that the whole constitutes a single piece of l apparatus.

In order that the invention may be clearly understood and readily carried into effect, itV will now be described more. fully with reference to the accompany-ing drawing, which illustrates an example of apparatus in accordance therewith, and in which Figurel shows in longitudinal section a grinding mill suitable for treating cement and fitted with cooling apparatus in accord ance with present/invention, and

FigureQ is a detail sectional vview showing a modification ofthe cooling apparatus. Y

In the form ofthe invention illustrated'in Figure l, the material to be ground is introduced into the milLwhich may be of ordinary forni constituted by a rotating chamber l,

` througlia trunnion 2 atione'end, but instead of its being delivered, as is common. practice, through a secondv trunnion at Ythe opposite 392,205, `Valarm .creat initalia catene; arises, j 1

3 and I conduits. 4 linto a lseries of tubes or`V cylinders 5, arranged arofundthe'external sur-H Vendit passesv through a number ofaperturesA i* face of thechainberL-and substantially paf.,

allel* thereto.v vThese tubes or cylinders :are

provided; with jacketsV 6 i'nto whichj cooling, water may be introducedlby pipes'fleading" fromA aA ring main! 8 havingfinlet 'pi-pesjQ;

connected toa source/lof' `supply through a I' i 'beby pipes llconnectedwith aringmain- '12' jhaving anoutletpip'e 13 adapted to discharge..1

ture,:15 l i In addition or alternatively. the i' coolingwater!may'leave'thejaclets 6 through I' 5 i av` series' of apertures; in such a rmannerj as? 1mp1nge',"as indicated, on the outer-surface'-r of the chamber' l, inlwhicha' coolingfeffect vis 1 thereby l produced-.r- Arlternatively,`r instead of passing the-fcoolingwater throu'ghjackets' it maybe sprayed "or otherwise appliedgto the external surfaces of the tubes through :which the cementfi'sp'assed. 'Y f u ,In order vto ensure; 'that the; cement shall; pass in asteady' stream throughy thetubes any suitable 'devices A.for this `purpose may, kbe emwith an internal helix lin the form of an inwardly proj ecting flange 16, Figure 2, or withY a sliding bar having i inclined: vanesor. with al spindlef. having a series ofI paddles and adapted t0 bey rotatedby any suitable means Insteadofo'rin additionto the .use''f,.such dnices,y therxactionY `o`f-`gravityy ,or Lvibration .ployed; for example, eachftubema'yfb fitted 5 of the tubes may belsuchga's tolpromotepas?.VIV y Sageqof the cement "through thenfnf;vfor exrtothe feeding "end yofthe grinding f:mill,.:,f

In order to prevent the cerncntfr'omclog.-Y

ging the tubes ydue to reel/zer steam generated therein. during the grinding process,l an outlet f 20 may be providedin proximity tothe de? livery end ofthe chamberl whereby, lthrlzugh a hollow' trunnion 21;, anyv vapour; which has; been generated maybe eXt1jfac`ted-t Similarly the hcodor hopper 18 into Whiclfi` the; cementgg, isA finally delivered-maybe tted. with a Vent i pipe 22, fer: vthe purposes O ldraWi-'ng CliffA via.-l pour4 andi maintain-ing thecement ina thor-v oughlyadry condition.lv

Y What-l' claimvv and desire-tc securev byfLetz 1.. Agrindngmill conifprfi'singjin ccmbimaf l ,L c tienafgrindmg;chamber, agnumberdficoolingv v and a sealbetween said hoodand said hopper. I l

6; A. grinding mill comprising in combination a grinding chamber, a number of cooling vchambersscparate from said grinding chamber, means for passing the material under treatment fromL said grinding chamber thrcugh said cooling clzialribers7` afj'acket .surrounding each of said cooling chambers, inlet and outlet mains respectively connected with each of said-jaclets aidmeans 'for' ccni-iectii'ig said inlet mainto a source ofi liquid' supply and said 1.outlet main te adischargejppe.

' 7. 'A grindingmillas in claim 4,' in which veach cooling tube isprovided `with ,an i11- Wardly projecting hellcal flangeY so located that;` on rctatixm-rofl the grindingchamber, the material Within thetubexispushed .twaidz the dcliveryend.. Y

n A gri yd'ngmillas;

a return series; Qt *coche-gf chambersvis pro-a` vided V-Whereby' final; deli-Veryr of. the granular; material.- placeY in; proximity; toi the de-,1.

livery end; oi-said grindingfchamber.1A,y

LroNEL; DQUQLAS-IPARKER--g i chambers'separate from said grinding chamf Y ber, meansfor"pass1ng-thefmater1alunder se treat-ment VVtrom! said grinding -ichamber through saideooling chambers: and means; for applyingA acooling liquid tothe outerzsuriace of said', cooling chambers w e 2. A grindingmill' comprising incombiina y tion a grinding; chamber, anumbero coole mg chambers, sepa-rate from saidgrindisng chamberr means` forv passing the. material under treatment frlomsaird-grinding chamber; l

through said coolingchambers, a jacket sur- 4Q, rotmdfing-each of saidcooling chambers and.' means for f circulatingl cooling liquid through each csaidjackets X grinding comprisin -in5ccmbi-s nation a grinding cha-mbeirianum er ofscoob 45 ing chambers,-means'forpassing'the material,

' under;trcatmentfrom said grinding chamber.V

te saidi coolingv chambers, a'jfacket surrcsugrnd1; lng each of saldi -coolrrrgfchambers' arrdmea-ns for cifrculatlngl cool'rngltlquid through eachoi Y '50; said' vjackets and'for spraying saidliquid on 4. A. grindngpmil'l' comprising in ccmbif' nationfa rotatablyrmoimted grinding chaumi-v bei",I a number oi? ccolinglcylindcrsfiin proxchamber, means: for passing the material -under treatment fromgsaidr grinding chamber through said cylinders and means: fer ap,p.lying cooling liquid to, thefouter-V surface. of

Gir said cylinders. Y Y n z 5 L.:.A;grinding asincIfai'mt; including a hoed,v meansevvherebyf the fmateriiali': under trcatmentis delivered'from'each cdsaid Coos ing cylinders into said hood, a. Y stationary l. Lif; hopper-"ncperative relationfwitlst said hood.V

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