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OUR COMPANY HISTORY During its 60+ year history of continuous manufacturing operations, Lee Industries, Inc has grown from a fabricator of metal parts, to a designer/manufacturer of complete processing systems Lee Industries started in business in 1927, producing the first nickel kettles, a manufacturing innovation at the time Lee equipment is in service throughout the world in major food processing, cosmetic, drug,and chemical industries " In 1935,Lee introduced the first offset centerline f' scraper agitators and in 1938 the first stainless steel t kettle for the food processing industry Throughout its!?\, history,lee has alwaysdemonstrated }I/I ' - r1 - innovative design and engineering IJ i l "" / expertise This, combined with quality t ft ' craftsmanship, has made Lee a leader I) r in the stainless steel processing \,,, equipment field In 1976, to provide a more personalized customer service, Process Systems and Equipment was formed as a division of Lee Industries, : has a well-organized chain of,[ U I! ' representatives throughout the United j i!, 1! I } States, who will be happy to hlp yu '\ r i) t when your needs demad the finest in ' \' \I I ]! stainless steel processing equipment I t r,!! : J j For the name of the representative in! / i ; your area or for any special application " : II i information, please contact Process j I Systems and Equipment at the address I or telephone number given on the back j page of this brochure ' \ i r, I I' i Inc ProcessSystemsand Equipment / YJ \ I 1 8' 8 Traditionally Fine Processing Equipment PROCESS SYSTEMS & EQUIPMENT DIVISION OF LEE INDUSTRIES, INC PO BOX 687, Philipsburg, PA 16866 FAX: 814/342-5660 Phone: 814/342-0470 l' Bulletin 220C 6
Turbo-Shear Head Configurations The diagrams below show the flow of a typical product expells it radially, at high velocity, through slots in the The scraper cleans the vessel walls once each revo- housingthe high pumping rate creates hydraulic and/ lution and moves the product toward the middle, where or mechanical shear, depending on head configuration it is further blended by the counterrotating bars The and total product circulation within the vessel The high-shear head is driven by a separate motor through standard head assembly enables the user to obtain any the center of the agitatorthe unique pumping action of of the configurations shown below by simply rearrangthe Turbo-Shear head assembly forces the product to ing the components move from the top or the bottom of the vessel and - Dispersion of heavyweight products that have a tendency to settle to the bottom A good configuration for this utilizes one (1) cone mounted with the smaller opening facing the bottom of the vessel It provides primarily hydraulic shear with a very slight amount of mechanical shear Pumping action is from bottom to top 8 - Dispersionof lightweight powders/liquids which have a tendency to float The configuration for this application is one (1) cone mounted with the smaller openingfacing the top of the vessel This provides primarily hydraulic shear with a very slight amount of mechanical shear Pumping action is from top to bottom Application- Increasedparticle size reduction of heavyweight products that have a tendency to settle to the bottom This configuration utilizes one (1) cone mounted with the smaller opening facing the bottom of the vessel and the shear plate on the large opening side of the cone A combination of hydraulic and mechanical shear is provided with the pumping action from bottom to top Application - Increased particle size reduction of lightweight powders/liquids which have a tendency to float This configuration utilizes one (1) cone mounted with the smaller opening facing the top of the vessel and the! shear plate on the large opening side of the cone A combination of hydraulic and mechanical shear is provided with the pumping action from top to bottom 3
K A H G 10 Qt thru 1000 Gallon "D12T" Kettles D NOTES: G WIDE CHANNEL H HP, 230/460V, 60C, 3PH, TEFC GEAR MOTOR (100 RPM) I LEE FLUSH BOTTOM BALL VALVE WITH TRI CLAMP CONNECTOR J STEAM INLET AND CONDENSATE OUTLET K HP, 230/460V, 60C, 3PH, TEFC, NEMA C-FACE MOUNT MOTOR (3450 RPM) D A F G 1 H 10 Qt thru 1000 Gallon "U 125" Tanks B NOTES: D HP, 230/460 V, 60C, 3PH, TEFC, NEMA C-FACE MOUNT MOTOR (3450 RPM) E LEE FLUSH BOTTOM BALL VALVE WITH TRI-CLAMP END CONNECTOR H WIDE CHANNEL I HP, 230/460V, 60C, 3PH, TEFC GEAR MOTOR 4
8 Particle Size Reduction Recently,LeeIndustriesconducteda particle size reduction test A 25 gallon style'd12t'lee pressure kettle with Tri-MixTurbo-Shear agitator was used The initial preparation consisted of an epoxy resin (2305% by weight), emulsified in water (2965%) with cellosize thickener (204%), and surfactant (30%) After five minutes of mixing with the double-motion scraped-surface agitator at 30 RPM, the resultant particle size was 55 microns The double-motion agitator was run for an additional '55 minutes Particles were reduced to 30 microns The doubje-motion agitator was shut off, and the 3,600 RPMTurbo-Shear with a type "C" head configurationwas utilizedsamplesexaminedafter an additional 25 to 40 minutes of high-shear agitation yielded particles of 5 to 7 microns Up to this point the product had been agitated one hour withthe double-motion agitator and one hour with the Turbo-Shear agitator Cellosize thickener (111%), flint(2055%), and pyrophyllite(255%) were then added The double-motion and Turbo- Shear agitators were run simultaneously for one hour Final particle size was 1 micron Final product viscosity was 40,000 CPS Particle size-55 microns Particle size-30 microns Particle size-5 to 7 microns Particle size-2 microns 8 8 Case Studies Demonstrating the Versatility of the Tri-Mix Turbo-Shear Mixing System 1 Product: Pectin solutions are used quite frequently in the production of jams, jellies, candy and similar products Pectin is a natural agent derived from apples or citrus fruit It is a polysaccharide having along chain formulation Problem: In liquid, this material has an extreme tendency to agglomerate, or form globules of unwetted or partially wetted pectin with a protective skin-like covering With conventional mixers, pectin is not completely dissolved When the vessel is drained, the sides and bottom are covered with a heavy film or acum of the undissolved globules This wasted pectin can cause enzyme contamination, a very serious problem Heat transfer is very poor and cleanup becomes a significant time factor in removing this film Solution: The Tri-MixTurbo- Shearwith type "C" con figuration The high-shearhead assemb,ly created a "wet vortex" in the fluid When the pectin was added, it was immediately drawn into the high-shear mixing head and completely sheared, thus eliminating unwetted globules The scrapers continually scraped the vessel's surface insuring good heat transfer and no product buildup As a result, no pectin was wasted The vessel drained completely and cleanup was fast and easy 2 Product: Liquid sugar syrup (67% Brixconsisting of water and granulated sugar) Problem: With conventional mixers, sugar has a tendency to "settle out" which can increase the dissolving time of the sugar Carmelization can result, should there be any "hot spots" Solution: The Tri-Mix Turbo- Shear with type "A" head configuration The unique pumping action of the Turbo-Shear maintained complete circulation of the vessel's contents Since high mechanical shear was not required, type "A" head con- figuration was sufficient Carmelization could not occur since total circulation eliminated the effects of any "hot \' spots" Since "settling out" was eliminated, rapid dissolving of the sugar was possible 3 Product: Tablet Coatings Problem: Powders tend to form clumps, when dispersed in solvent The surfaces of the clumps solvate, forming a layer which prevents rapid wetting of the interior of the clumps When a propeller-type mixer was used, a mix time of (4) hours was required to break down large clumps Small clumps of undispersed powder remained Solution: Using the Lee Tri-Mix Turbo-Shear, the powders were dispersed immediately before half-hydrated, hard-to-disperse lumps formed Mixing time was reduced from (4) hours to (10) minutes! Complete dispersion of the powders in a short time greatly reduced the aeration that was previously experienced
TriMix TurboShear@ high-shear mixing system The Tri-Mix Turbo-Shear is one of the most versatile, high performance mixing systems available today It can reduce and control uniform particle size to as small as two microns It blends, disperses, and emulsifies ingredients in either a liquid/liquid or liquid/solid system This unit combines the heat exchanging efficiency and mass blending of the traditional Lee double-motion scraped-surface agitation system with the homogenizing action of the Turbo-Shear mixing head This unique mixing head offers a variety of configurations for versatility in mixing applications The Turbo-Shear utilizes both mechanical and hydraulic shear to dissolve powders, blend miscible and nonmiscible solutions, prepare lotions and creams, and disperse pigments A center shaft, which can be run with the primary doublemotion agitator or alone, operates at either 1,725 or 3,450 RPM Other speeds are available on special request The scraped-surface, doublemotion agitator cleans the vessel walls during each blending revolution The Tri-Mix Turbo-Shear can also be designed for pressure and vacuum And, because the high ratio of hydraulic to mechanical shear does not induce great quantities of heat, the Tri-Mix can process your temperature-sensitive products too The Lee Tri-Mix Turbo-Shear is available from as small as 10 quart research models to as large as 1,000 gallon production vessels Custom-designed units are also available for especially difficult applications A product guarantee, based on free testing of your product in our 25 gallon lab Tri-Mix Turbo-Shear, adds security to your investment Installation utilizing Tri-Mix Turbo-Shear agitation 25 gallon vacuum kettle with Tri-Mix Turbo-Shear agitator