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Visit us at Powder & Bulk Solids Expo in Rosemont, Illinois on May 6-8, 2008 at the Donald E. Stephens Convention Center, booth 1204.
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New Sweco Product Nets 400-1,000% Efficiency Gains in Tough Separation Applications
FLORENCE, KY - In applications as diverse as separating potato peelings from water and aluminum shavings from cutting oil, a field-proven Sweco innovation using a patented invention known as an "Integrated Screen Press" is making production engineers and management take notice.
The Integrated Screen Press is a vibratory screener and screw press that complement each other, working in unison to form a dynamic dewatering system that delivers maximum flow capacity, separation efficiency and dryness of solids.
One application that provides a strong example of the increase in efficiency provided by the screen press occurred at a nationally known snack-food manufacturer. Faced with an annual landfill disposal surcharge of $400,000 for potato peelings and cellulose because their processing discharge had far too high a water content, the potato chip maker turned to Florence, Kentucky separation experts at Sweco for help.
According to Sweco engineer and inventor of the Integrated Screen Press, John Greenrose, "The problem was a common one. A fast feed rate had to be maintained for production purposes, but the solids were causing screen blinding and flooding. So they had to choose the lesser of two evils, pay a high surcharge for disposal or slow up production."
The solution was to integrate a press with the vibratory separator already in service. Results were dramatic. Even at higher throughput the discharge is now dry enough to be used as livestock feed instead of landfill.
According to Greenrose, "It was really a win-win-win situation. Management is happy because they're now saving over $300,000 a year in surcharges; production people can keep up with quotas; and the environmental impact is substantially lower."
Applications and economies for the Integrated Screen Press aren't limited to food processing, of course. For example, an aluminum processor was regularly recycling metal cutting fluid at a rate of 30 gallons per minute through an 80 mesh screen, but there was a loss rate of 10 gallons of cutting fluid per minute.
When an Integrated Screen Press was added to the recycling process the aluminum processor was able to increase the screen mesh to 300 and the feed rate to 120 gallons per minute. They realized a 400% increase in throughput; removed 100% of the metal shavings from the oil; and the ratio of solids to liquid went from 80:20 to 100:0.
"All screeners have the same problem of blinding," Greenrose said, "If you run fluids into them too fast, the screens can get blinded over, and the next thing you know you're dumping water in with solids. And that's the point of the Integrated Screen Press. It's a simple, low-cost way to keep your solids in one place and your liquids in another."
Designed to work in conjunction with a vibratory separator, the press is well suited to many dewatering applications including: animal or industrial waste handling, recovering metal cutting fluids, recycling laundry water, dewatering farm refuse, food processing and capturing by-products from bio-tech operations.
"We recently helped a waste disposal contractor save a fortune in labor costs," Greenrose said, "They were dumping grease and other fatty fluids into holding tanks awaiting disposal. Because they couldn't adequately separate fluids and solids, they had to drain the tanks occasionally and actually shovel out the solids -- a nasty and time-consuming job."
An Integrated Screen Press was installed and now they never have to drain their tanks to remove muck. They're able to pump fluid into the tanks at a rate of 200 gallons per minute and anything larger than 300 microns is removed before it gets to the tank.
According to Greenrose, "Advantages of the Integrated Screen Press are substantial. You can handle a higher flow rate at a finer screen mesh. Solids come out drier and cleanup time is reduced. What's more, because solids are drier, you have lower hauling fees and during transport they don't slosh all over the place."
"New Sweco products nets 400-1,000% efficiency gains in tough separation applications."
With more than 50 years of separation technology experience, Sweco serves the pharmaceutical, paper and many other industries with a complete line of separation, sizing and milling equipment. With headquarters in Florence, Kentucky, Sweco provides sales and customer service to clients virtually anywhere in the world.
For more information, contact us at info@sweco.com or at 1-800-80SWECO.
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Sweco World
Headquarters,
Florence, KY USA
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