- Written by C&D World News
Action Equipment Co., Bulk Handling Systems, Erin Recycling, General Kinematics, Krause Manufacturing, Lubo USA, Machinex, Sparta Innovations,
By Gina Tverdak, Associate Editor
Action Equipment Co.
Action Equipment’s Taper-Slot screens are designed for challenging applications that conventional screens cannot handle. Taper-Slot screens are reliabile and consistent, and can be used in applications such as C&D, wood waste, MSW, glass, plastics and metal, and many other materials.
Unlike conventional finger screens, Taper-Slot screens, with patented lateral wedge members, offer hang-up elimination. Lateral wedge deflectors prevent material from shifting laterally and catching under or wrapping around finger tips, allowing the screen to remain clean for maximum screening efficiency. The lateral wedge deflectors prevent longer, often oversized materials from shifting sideways under a finger tip and falling into the accepts. The deflectors also prevent undesirable “finger–bending” and function as gussets under each finger to provide rigidity for long screen life. Staggered fingers and divergent openings allow particles the opportunity to self-relieve/cam-out.
Each Taper-Slot screen is customized to meet application requirements including apertures with optimized open area. There is no plugging, blinding, or hang-ups common to conventional perforated or wire mesh screens and material flow is distributed at a regulated rate to downstream equipment such as a sort line or grinder. The screens are easy to install, maintain and operate. There are no periodic stops or re-tunes due to material wrapping around fingers, discs, shafts, gears, chains or sprockets and no increase to material volumes of lightweight materials such as paper. The screen sections are modular and easy to change, and eliminates belt conveyors. www.actionconveyors.com
Bulk Handling Systems
The Bulk Handling Systems (BHS) Polishing Screen-DRS is an effective separator of fiber and containers. The BHS Polishing Screen has the ability to create three material fractions: mixed fiber, containers and fines. The mixed fiber is conveyed over the screening surface, while the containers and 3-D objects roll off the back of the screen and are consolidated for sorting. The fines, consisting of bottle caps, dirt, grit and small fiber, fall through the screening surface and are chuted to a storage bin or conveyed to a collection area for disposal. The three-sort unit provides an extremely clean container stream, resulting in improved recovery of valuable containers and virtually no loss of fiber to residue.
The Polishing Screen-DRS can be used in single stream/commingled, dual stream and commercial mixed material applications. The patented in-line discs virtually eliminate material wrapping, resulting in reduced downtime, enhanced safety and extended screening efficiency. Fiber loss to residue is also reduced. Variable speed drives and hydraulically adjustable deck angles allow for fast changes to meet processing requirements. Tipple section (last four shafts) allows for an additional 5˚of screen inclination and the two-piece disc is easy to replace. Various inter-face openings (IFO) are available. The screen discs are available in sizes 84-, 96-, 102-, 120-, 132- and 144-inches.
BHS also offers the Debris Roll Screen, which has been designed to process single stream, MSW, C&D waste, wood waste, compost, plastics, glass, tires and other miscellaneous materials. Accurate material sizing is achieved due to the disc configuration. The compound disc design minimizes long pieces falling through. Disc timing prevents opposing discs from pulling long stringy material down like traditional disc screens.
The patented BHS compound discs are in-line from shaft-to-shaft creating a precise opening for highly-accurate material sizing and Tri-Discs agitate material and impart a bouncing wavelike action into the material to effectively separate the various size fractions. Timed DRS discs are designed so that as one disc tip is moving downward, the reciprocating disc tip kicks troublesome material out of the potential jamming areas. BHS components are designed and manufactured to withstand demanding processing environments. For abrasive applications like glass processing, C&D and MSW, durable steel castings are hardened to a 400+ Brinell rating.
The Erin Fingerscreener is a heavy duty screening device designed to process a wide variety of difficult materials commonly contained in C&D waste streams. Capable of being direct-fed by an excavator or Apron conveyor, the vibrating screenbox combines self-cleaning top deck Grizzly fingers or Grizzly bars along with mesh screens or Cascade fingers installed on the bottom deck. Having a wide selection of Cascade fingers and screen cloth openings ensures separation efficiency with the toughest materials and in the worst weather conditions.
The primary purpose for the double-deck screenbox is to remove the fines material, and the configuration of the system allows the separation of one or two additional products, according to fractional size. In a system designed to make a two-way separation, the fine material is collected by the fine collection conveyor beneath the bottom deck, whereas coarse overs and medium-size material fall to an overs conveyor at the end of the screenbox. In a three-fraction system, the fines, middles, and overs are discharged onto separate conveyors.
Erin’s Fingerscreener screenbox is capable of working in direct-feed applications and can be fed by an apron feeder or an apron conveyor for increased performance. The Rosta vibration isolation mounts on each corner of screenbox. Self-cleaning finger screens or mesh screens arrangement are available for bottom and top deck, and are able to screen to fine sizes in one pass, with one screener. The bearing heating system makes start-up easy in cold temperatures
and the Screenbox decline angle comes in 12˚ or 16˚. Three models are available. www.erinrecycling.com
General Kinematics patented, non-binding finger-screen design concept for resource recycling has proven to be successful in a wide range of applications that are prone to hang-ups common to conventional wire mesh screening surfaces. The performance of vibratory processing and the simple jam-proof movement over the finger-screen delivers efficient separation and classification. The units vibrating motion spreads material evenly across the deck for maximum separating efficiency. Multiple size separating decks enhance classification while staggered finger positions help to prevent material bypass. Separation performance is enhanced as material freely cascades through the unit—with less “trapping.” The result: fast, smooth continuous material flow throughout the entire separation and classification process.
The company’s vibrating screens two-mass drive system reduces electrical consumption and increases screening efficiency over traditional direct drive (brute force) designs. Options include replaceable decks, multiple decked units, banana style decks, and special corrosion resistant finishes. GK Two-Mass screens are available in standard and custom sizes to easily fit into existing processes. Compact, low HP vibratory motors are mounted to the unit for fast change-outs.
General Kinematics also offers high-energy secondary fines screens that use vibratory action to remove fines materials from secondary sort line material. The two-mass, low horsepower design has few moving parts for reduced maintenance when compared to rotary trommels or star-type screens, and is extra heavy-duty for wear resistance and durability. Easily replaceable decks can be custom engineered for specific fines cut and few moving parts and heavy-duty construction mean more uptime and less maintenance.
Krause Manufacturing’s heavy-duty disc screens provide high throughput, reduced labor costs, super-low maintenance, and increased diversion rates. They are rugged, dependable and long-lasting. Krause’s disc screens can be used in applications from C&D recycling to single stream MRFs to fiber separation.
All Krause disc screens are engineered and built to withstand the demands of harsh recycling environments. Solid steel Hardox 500 steel discs provide longer life than rubber discs and have greater weld-ability. The larger shaft size offers greater resistance to heavy impacts and the enclosed oiler system for lubrication of chain and sprockets increases component life. The heavy steel structure frame stands up to rigorous C&D conditions. A planetary drive provides a smaller package for the same horsepower. Square shafts provide easy removal of wrapped materials, and hoppers and transitions have been designed to keep product in the machine where it belongs.
According to Krause, the ADC steel disc screens have the largest shaft and bearing size in the industry. These shouldered discs have hardened inserts, which provide long life and consistent hole size. They are built with a labyrinth seal to protect bearings from contamination. www.krausemanufacturing.com
Lubo Screening & Recycling Systems B.V. is specialized in the design and construction of the starscreen.
For sticky applications, stars with cleaning fingers keep the screen constantly open. The starscreen 660 allows coarse screening of various materials without blocking and mixing. An angled sorter separates spherical or cubic materials from light ftlt materials (paper). The starscreen has also been developed for separation of cardboard from paper. These are a few examples of uncommon solutions achieved through the use of the starscreen principle. Four different screen dimensions have been developed, so that a screening deck can be designed and a screen dimension chosen for virtually all materials.
Advantages of the Lubo starscreen include the screen deck spreads the materials and pulls them apart; high processing capacity, particularly with difficult materials such as sticky materials; screens can be simply mounted in series so that a number of sizes can be screened in a single line. The (patented) cleaning finger keeps the screening deck clean during the screening process. This prevents deviations in the screening dimension and removes the need for stoppages for cleaning. Thanks to the variable rotating speed, various screening dimensions can be achieved using one star dimension. There is no need to adjust the screening deck between runs because the screens do not shake or vibrate—a a lightweight sub-frame suffices. The sloping screening angle saves space. www.lubousa.com
The Machinex C&D separator removes fines from the stream to reduce handpicking. It also purifies the stream for downstream applications. The company will design the system to specific adjustments based on separation and incoming tonnage. Finger type discs are used for a better separation and independent speed control for each motor ensures optimum results. The inclined screening surface increases retention time and the rotor shafts are mounted on heavy duty bearings for a long lasting life. www.machinex.ca
Sparta finger screens have been built to ensure efficiency, allowing the system to handle tough material flows. All of the company’s equipment is designed for easy operation, maintenance and parts replacement, providing productivity and minimal downtime. Sparta’s fingers screens have several benefits: Abrasion resistant impact feeding area; propriatary bushing design that yields optimal contact between the fingers and the bushings; 7/8-in. thick side plate; patent-pending staggered fingers design allowing shearing of materials and reducing potential spiking of wood and re-bar; fewer cross braces between the two decks in order to reduce risks of bridging; side tensioning system to facilitate changing and tensioning of screen meshes; greater clearance between the two decks; arches along the length of the screen box in order to distribute the product over the entire lower screen deck; and a 16-inch clearance between housing and lower deck.