powder and bulkdegrade, pack, cake, smear, seize or plug in other convey-ors—with no separation of...
TRANSCRIPT
Big dryer, small footprint: Minimizing your convection dryer’senvironmental impactDan PoirierThis article details several methods for reducing your convection dryer’s energyuse and minimizing the dryer’s effect on the environment.
Suppliers’ tips Equipment suppliers provide dryer maintenance tips and discuss the benefits ofdrying trials.
Mixing MechanicsColumnist Peter R. Holman asks whether it’s time to switch to continuous mixing.
Case history: Almond company chooses gentle, clean conveyingA California company revamps its almond processing line, including installingtubular drag conveyors to ensure gentle, dust-free nut handling.
Case history: Automated material handling system provides efficient,trouble-free ingredient batchingA refractories company installs an automated batching system to improve itsproduction process.
Product summary Resource catalogs
Powder and BulkEngineering
April 2008Volume 22 Number 4
DRYING
GENERAL FEATURES
DEPARTMENTS
Powder and Bulk Engineering (ISSN 0897-6627) is published monthly, twelve times per year for $100 per year by CSC Publishing, Inc., 1155 North-land Drive, St. Paul, MN 55120. Periodicals postage paid at St. Paul, MN and additional mailing office. POSTMASTER: Send address changes to Powderand Bulk Engineering, 1155 Northland Drive, St. Paul, MN 55120.
On the cover: Krauss-Maffei Plate Dryer continuously and gently dries free-flowing powdersand heat-sensitive, toxic, or solvent-wet materials in a controlled environment. Dryer operates as aconduction dryer to remove water or solvent vapors using little carrier gas, minimizing dustcarryover. Dryer controls exact drying temperatures on each plate to provide very high final productquality. Dryer is available as an atmospheric, gas-tight, or vacuum model with heat-transfer areas upto 2,160 square feet. Courtesy of KMPT USA, Florence, KY, 859-547-1100 (www.kmpt.net).
www.powderbulk.com
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An introduction to steam-atmosphere dryingStewart G. GibsonLearn how steam-atmosphere drying works and how to determine if this dryingtechnique is right for your product.
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Case history: Seals sustain dryer’s vacuumA chemical producer installs mechanical seals on its horizontal rotary vacuumdryer to maintain vacuum and increase productivity.
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SPECIAL FEATURES
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Powder Show previewThis year’s Powder Show is co-located with three other shows; get the details here.
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Web reviewEquipment suppliers share information about their company Web sites.
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8 Industry perspective 66 Continuing education10 Editor’s note 71 What’s new10 Industry news 72 People news12 Markets update 72 Product news22 Engineering literature: 109 Classified advertising
Bin dischargers 111 Advertiser index64 Calendar
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DENSE PHASETRANSPORTERS
4 PBEApril 2008
Powder and Bulk Engineering
EditorialTerry O’[email protected] DavichSenior [email protected] HarkinAssociate [email protected] TyznikAssociate [email protected]
Production and ArtMaria NovakProduction [email protected] MyersAssistant [email protected] RostProduction [email protected] MyersPrepress [email protected]
CirculationAileen HoughCirculation [email protected] HighumCirculation [email protected]
BusinessRichard R. [email protected] FitchAdministrative [email protected] CressAcctg/Oper [email protected] FischerAcctg/Oper [email protected] WoodAcctg/Mktg [email protected]
Maggie JohnsonMidwest & SoutheasternSales ManagerAL, AR, FL, GA, IA, IL,LA, MN, MS, ND, OK,SC, SD, TX, [email protected]
Steve EgenolfEastern Sales ManagerCT, DE, MA, MD, ME,NH, NJ, NY, RI, [email protected]
Bonnie KayeNational AccountsManagerIL, [email protected]
AdvertisingMarybeth StewartMid-Atlantic & WesternSales ManagerCA, ID, MD, NC, NV,OR, PA, VA, WA, WV,[email protected]
Jan LeeMidwest Sales ManagerIN, KY, MI, OH, [email protected]
Kevin CloheseyUpstate New York,Western & Canada SalesManagerAZ, CO, IL, MO, MT,NM, UT, [email protected]
www.powderbulk.com
©2008 by CSC Publishing, Inc. All rights reserved. No part ofthis publication may be reproduced or transmitted in any form orby any means without written permission from the publisher.Powder and Bulk Engineering assumes no responsibility forstatements or opinions of editorial contributors or advertisers.Subscriptions: No charge for qualified North American readersubscriptions from key engineers, managers, and other personnelat companies specializing in dry particulate processing. Go towww.powderbulk.com to apply for a qualified reader subscrip-tion. Publisher reserves the right to refuse nonqualified readers.Change of address: Notices should provide old and new ad-dress; ZIP code or postal zone number must be included. If possi-ble, attach address label from current issue. Allow 6 weeks forchange to become effective.
Publishing Office1155 Northland Drive • St. Paul, MN 55120
651-287-5600 • FAX: 651-287-5650 • e-mail:[email protected]
Philadelphia Office800 West State St., Suite 103 • Doylestown, PA 18901
215-340-6988 • FAX: 215-340-6989 • e-mail:[email protected]
Cincinnati Office887 Murle Lane • Loveland, OH 45140
513-583-9768 • FAX: 513-583-9736 • e-mail:[email protected]
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Bulk bag filling just gotfaster, safer and easier
®
www.flexicon.com
*Patent(s) granted and/or pending.©2004 Flexicon Corporation. Flexicon Corporation has registrations and pendingapplications for the trademark FLEXICON throughout the world.
By lowering the fill head andpivoting the bag connectionframe to vertical, the SWING-DOWN™ filler* puts theinflatable spout seal, inflatorbutton and all four looplatches within one arm'slength of an operator standingat floor level.
No more climbing on laddersor roller conveyors and duck-ing under fill heads to makeconnections. No more stick-ing head and arms up intomovable components. And nomore straining backs to pullspouts upward while strug-gling with connection devices.
It means your operator canconnect empty bags quickly,safely and easily while stand-ing securely on the floor. Outof harm's way.
Completing the filling cycleis even easier: Pressing onebutton on a remote panelsimultaneously pivots the bagconnection frame back tohorizontal and raises the fillhead to “bag-fill” height,inflates the bag to removecreases, weigh-fills the bag,densifies the material to sta-bilize the bag, deflates thespout seal, releases the looplatches, raises the fill head todisconnect the spout, andsends the bag out of the filleron the roller conveyor.Automatically. Ready foranother “bag-load” cycle.
Bulk bag filling just doesn’tget more efficient than this.
See it in action at www.flexicon.com
Revolutionary SWING-DOWN™ filler*brings fill head to operator for faster,safer and easier bag connections
The fill head lowers on demand, pivot-ing the bag connection frame into avertical position, within one arm's reachof an operator standing at floor level.
n
i-tion, fill head raised to "bag fill" position,and bag inflated to remove creases(right).
Convey pneumatically to/from multiple discharge/inlet pointsFlexicon pneumatic conveying systems transport a broadrange of bulk materials overshort or long distances betweensingle or multiple inlet and discharge points in small tohigh capacities. Offered in bothpositive pressure or vacuumconfigurations, from single-point “up-and-in” installationsto mobile units to cross-plantsystems complete with rotaryairlock valves, pick-up adapters,filter receivers, cyclone separa-tors, fill/pass valves, hand-held pick-up wands, silos, daybins and more. Available designed, constructed and finishedto industrial and sanitary standards.
Dust-free bulk baguntying, retying, removalRevolutionary discharger fea-tures a SPOUT-LOCK® clampring* that creates a high-integri-ty, clean seal between bagspout and hopper, preventingcontamination and dust duringhook-up and discharge. TELE-TUBE® telescoping tube* rais-es the clamp ring to make con-nection, then lowers, applyingcontinual tension to keep spouttaut as bag empties/elongates,preventing dead spots andflow restrictions. POWER-CINCHER® flow control valve*cinches the spout concentrically for easy, leak-proof retyingof partially empty bags. BAG-VAC® dust collector createsnegative pressure within dust-tight system to collapse emptybags prior to retying and disconnection, eliminating dustfrom manual flattening of empty bags.
Convey free- andnon-free-flowing materialsConvey free-flowing and non-free-flowing bulk solids rangingfrom large pellets to sub-micron powders—includingmaterials that can fluidize,degrade, pack, cake, smear,seize or plug in other convey-ors—with no separation ofblended products. Units con-vey vertically, horizontally, or atany angle—through smallopenings in walls or ceilings—around, over, or under obstruc-tions. The only moving partcontacting material is a rugged flexible screw, increasing reli-ability and cutting maintenance. Enclosed conveyor tubeprevents contamination of product and plant environment.Cleans quickly, easily. Individual conveyors available as wellas plant-wide systems with automated controls.
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UNITED KINGDOM +44 (0)1227 374710AUSTRALIA +61 (0)2 9482 4033SOUTH AFRICA +27 (0)41 453 1871
FLEXICON CORPORATION2400 Emrick Blvd.Bethlehem, PA 18020-8006 USATel: 1 888 FLEXICON (1 888 353 9426)Tel: 1 610 814 2400 • Fax: 1 610 814 0600E-mail: [email protected]
PPowder Show – Booth #1005
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FilterSense
Baghouse Controls
B-PAC™ Controls use field proven IntelliPULSE™ to reduce energy costs, lower emissions and extend
maintenance by instantly detecting and
The original intelligent Baghouseer
Powder Show Booth 1350, May 6 - 8Analyze, Optimize, Comply™
1-978-927-4304
As the industry pioneer in baghouse diagnostics, FilterSense pro-vides unmatched products for small dust collectors to large scale
6 PBEApril 2008
Powder and Bulk Engineering
Editorial Advisory Board
Timothy A. BellSolids Handling Specialist,Particle Science and Technology Group
DuPont Central Research and Development
John W. CarsonBulk Solids HandlingJenike & Johanson
John A. ConstanceConsulting EngineerDust and Vapor ControlThe Engineers Collaborative
James L. DavisSolids Processing Technology Leader, Corporate Engineer
Procter & Gamble
Shrikant DhodapkarSolids Processing and Handling Specialist
The Dow Chemical Company USA
Daniel J. DonovanProject Manager/FindlayDow Chemical North America
William H. EngelleitnerConsultantAgglomerationAME Pittsburgh
Richard J. FarnishConsulting Engineer, Powder Handling
The Wolfson CentreUniversity of Greenwich
Peter R. HolmanConsulting EngineerMixingHolman Engineering
Gary Q. JohnsonConsultantContainment and Industrial Ventilation
Workplace Exposure Solutions
George E. KlinzingSolids HandlingUniversity of Pittsburgh
Schuyler K. MarshConsulting EngineerDrying and Pressure FiltrationE. I. DuPont de Nemours and Co.
Brij M. MoudgilDirector, Particle Engineering Research Center
University of Florida
Joseph F. Reilly Jr.Consulting EngineerPackagingIndustrial Handling Engineers
Paul E. SoltConsultantPneumatic ConveyingPneumatic Conveying Consultants
John J. WalshConsulting EngineerDryingAmerican Drying Consultants
Write for PBEWe welcome technical and application articles from engineers discussing the technology or equipment they use to handle, process,package, or transport powder and bulk solid materials. We’ll con-sider papers on agglomeration; bagging and packaging; classifying;drying; dust collection and control; feeding; mixing and blending;particle analysis; pneumatic or mechanical conveying; processsafety; screening and sifting; size reduction; storage and storage con-tainers; and weighing and batching. Visit www.powderbulk.com forour article guidelines, or contact the editor at 651-287-5600([email protected]).
Powder and Bulk Engineering, St. Paul, MN
POWDERSHOW
BOOTH #2538
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The next generation in ultra-high speed powder dispersion.
It’s simple.
1. This is where your liquid stream enters the SLIM Solid/Liquid Injection Manifold.
2. This is where powders like fumed silica, thickeners or pigments are drawn into the mix chamber at high velocity.
3. This is where the powder is directed into the high shear zone and instantly dispersed under intense shear into the liquid stream.4. This is where you start
saving money – with no maintenance headaches, no dusting, lower costs, a superior dispersion, and a 50% boost in production.
The SLIM high-speed powderinjection system disperses powders likefumed silica, gums, thickeners andpigments instantly – in the high shearzone of a specially modifiedrotor/stator generator.
Because the SLIM operates withoutan eductor, it is free of the cloggingthat plagues eductor-based systems.Throughput is much higher, too.
See the SLIM system now.Call to arrange a no-charge
demonstration in the Ross Test &Development Center – or in your plant. E-mail: [email protected]. Or call 1-800-243-ROSS.
www.PowderInjection.com
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