From: Breaking Rocks and Other Hard Stuff
Sorting Mixed Construction Waste
On the assumption that processing mixed construction and demolition waste at a job site is inherently inefficient, Continental Biomass Industries Inc. of Newton, NH, offers technology that transfer stations and landfills can use to process such waste, reducing its volume and capturing specific materials to recycle.
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Photo: CBI |
“We provide a complete processing line,” says Mark Taitz, CBI’s director of business development.
The centerpiece of that line, a primary shredder aptly named the Annihilator, has a 20,000-pound forged-steel rotor, an 8,000-pound hydraulically actuated anvil, and 42 hammers that fit against teeth on the anvil. The machine can be electric or diesel powered, to run dual Hägglunds radial-piston direct-drive shaft-mounted motors from Hägglunds Drives AB in Mellansel, Sweden. These drives transfer 250,000 foot-pounds of torque to the rotor.
“It’s a high-torque, low-speed machine,” Taitz says. “The rotor rotates at just 33 revolutions per minute. Although it’s loaded from the top, the Annihilator doesn’t hurl stuff out like tub grinders that may spin at up to 1,500 revolutions per minute.”
The Annihilator can process more than 100 tons of waste an hour. The feed hopper has an opening 10.5 feet long and 8 feet wide. Material dropped into it from a feed conveyor falls against the adjustable anvil-and-hammer assembly, and emerges onto a discharge conveyor in manageable 15-inch-minus to 18-inch-minus chunks.
This reduced material then receives additional processing. “We shake out the fines with a vibratory screener,” Taitz says. “The glass, plastics, woodwaste, paper, carpet, gypsum, asphalt, et cetera, go by conveyor to a manual picking line with eight to 16 stations, where people pick out the materials they want to reclaim. A lot of that is wood, which goes by conveyor into a secondary grinder to get down to a smaller product size so it can be used for fuel.
“Plastics, asphalt, and other materials go through a CBI Grizzly Mill woodwaste grinder for reduction to a 2-inch-minus material that is used for grading and sloping, and for alternative daily cover at landfills.
“All of this is designed and engineered by CBI, and we also build most of it. We look at a client’s needs—his physical building, feedstock, and end-product requirements. Then we design a system that will accommodate all of these aspects. Clients using this type of equipment can recycle or get a beneficial reuse out of 90% to 95% of the material that comes in.”
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CBI provided the plant for ABC&D Recycling Inc. in Ware, MA, a firm that processes material from local haulers in a 50-mile radius. This plant includes an Annihilator; a vibratory screener; eight picking stations to capture wood for boiler fuel, and four other retrievable materials; six conveyors; a secondary grinder for wood; and another secondary grinder for “unpickables” that aren’t retrieved and are ground up for use as landfill cover. The plant cost $2.2 million.
CBI builds plants for use all over the world, including Australia and Thailand within the past year. “The fuel issue drives their economics,” Taitz says.
September-October 2006
From: Breaking Rocks and Other Hard Stuff
Sorting Mixed Construction Waste
On the assumption that processing mixed construction and demolition waste at a job site is inherently inefficient, Continental Biomass Industries Inc. of Newton, NH, offers technology that transfer stations and landfills can use to process such waste, reducing its volume and capturing specific materials to recycle.
|
Photo: CBI |
“We provide a complete processing line,” says Mark Taitz, CBI’s director of business development.
The centerpiece of that line, a primary shredder aptly named the Annihilator, has a 20,000-pound forged-steel rotor, an 8,000-pound hydraulically actuated anvil, and 42 hammers that fit against teeth on the anvil. The machine can be electric or diesel powered, to run dual Hägglunds radial-piston direct-drive shaft-mounted motors from Hägglunds Drives AB in Mellansel, Sweden. These drives transfer 250,000 foot-pounds of torque to the rotor.
“It’s a high-torque, low-speed machine,” Taitz says. “The rotor rotates at just 33 revolutions per minute. Although it’s loaded from the top, the Annihilator doesn’t hurl stuff out like tub grinders that may spin at up to 1,500 revolutions per minute.”
The Annihilator can process more than 100 tons of waste an hour. The feed hopper has an opening 10.5 feet long and 8 feet wide. Material dropped into it from a feed conveyor falls against the adjustable anvil-and-hammer assembly, and emerges onto a discharge conveyor in manageable 15-inch-minus to 18-inch-minus chunks.
This reduced material then receives additional processing. “We shake out the fines with a vibratory screener,” Taitz says. “The glass, plastics, woodwaste, paper, carpet, gypsum, asphalt, et cetera, go by conveyor to a manual picking line with eight to 16 stations, where people pick out the materials they want to reclaim. A lot of that is wood, which goes by conveyor into a secondary grinder to get down to a smaller product size so it can be used for fuel.
“Plastics, asphalt, and other materials go through a CBI Grizzly Mill woodwaste grinder for reduction to a 2-inch-minus material that is used for grading and sloping, and for alternative daily cover at landfills.
“All of this is designed and engineered by CBI, and we also build most of it. We look at a client’s needs—his physical building, feedstock, and end-product requirements. Then we design a system that will accommodate all of these aspects. Clients using this type of equipment can recycle or get a beneficial reuse out of 90% to 95% of the material that comes in.”
CBI provided the plant for ABC&D Recycling Inc. in Ware, MA, a firm that processes material from local haulers in a 50-mile radius. This plant includes an Annihilator; a vibratory screener; eight picking stations to capture wood for boiler fuel, and four other retrievable materials; six conveyors; a secondary grinder for wood; and another secondary grinder for “unpickables” that aren’t retrieved and are ground up for use as landfill cover. The plant cost $2.2 million.
CBI builds plants for use all over the world, including Australia and Thailand within the past year. “The fuel issue drives their economics,” Taitz says.