Mass Flow Live Bottom Screw Feeder for Metering Solid Waste Fuel

General Description

Giant Resource Recovery (GRR) is a full-service environmental company operating 4 permitted hazardous waste facilities in the eastern half of the US. The Harleyville, SC facility is co-located with the Giant Cement production facility. Giant Resource Recovery and Giant Cement work together to provide safe, environmentally beneficial waste management services by recovering the energy value from many hazardous and non-hazardous wastes. By utilizing these hazardous and non-hazardous waste as fuel, GRR conserves approximately 70,000 tons of fossil fuel per year.

Giant Resource Recovery accepts bulk waste such as solvents, waste oils, coolants, filters, rags, debris, and other solids by railcars, tanker trucks, and dump trailers. Once Giant Resource Recovery has processed the waste into fuel, it delivered to the kilns at Giant Cement where it is burned in the production of Portland cement.

Giant Cement is Located in Harleyville, SC

Design Parameters

Product Type: Solid Waste Fuel
Material Density: 24 to 45 Lbs. per Cubic Foot
Capacity: 640 Cubic Feet per Hour
Duty: Intermittent

KWS Advantages

KWS has thousands of installations utilizing screw feeders in various configurations and applications along with hoppers and silos. GRR and KWS collaborated to design a multi-screw live bottom feeder with a hopper to accept solid waste fuel from a front-end loader and transfer the material with the live bottom feeder underneath. KWS met the demands of the challenge.

KWS Special Features

KWS provided a new loading hopper with a multi-screw live bottom feeder to hold approximately 200 cubic feet of material. The hopper was designed with heavy duty structural supports consisting of square tubing, and heavy-duty angle iron bracing to handle the load in the hopper along with the weight of the multi-screw feeder. The walls of the hopper were designed to be vertical with no angles to remove the chance of material bridging.

Mass flow screw feeder design provides the most efficient method of discharging material from a large hopper. This design consists of a tapered cone located on the center pipe with a combination of varying pitches to evenly draw down material along the entire length of the hopper opening.

The multi-screw feeder was designed with independent gearmotors, one per each screw. This independent gear motor arrangement allows for smaller power transmission components, fewer maintenance components, and system redundancy when compared to a single large gearmotor with gears or chain & sprocket connections.

Testimonial

"The KWS equipment is up and running and works great. We will use KWS on the next phase of the project. Thanks for the excellent design and heavy-duty fabrication."

Solids Fuel Supervisor, Giant Resource Recovery