KWS Manufacturing

Inclined Screw Feeder for Soil Remediation Process

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Owner Name

Endpoint Consulting, Inc.
Burlingame, CA

General Description

Endpoint Consulting, Inc. was founded based on multiple patented green and sustainable technologies, including systems that convert municipal waste into energy and mobile ex-situ thermal desorption systems which treat hydrocarbon and PCB-impacted soils to unrestricted reuse levels and significantly reduce the cost and carbon footprint of remediation relative to traditional dig-and-haul projects.

With these technologies as its foundation, Endpoint transitioned into a consulting firm providing state-of-the-art services in sustainability, environmental health management, and resource protection. While providing a wide range of environmental services, Endpoint’s primary areas of expertise include in-situ remediation, sustainability consulting, and vapor intrusion assessments.

KWS Inclined Screw Feeder is Mounted on Trailer and Part of Soil Remediation Process

KWS Inclined Screw Feeder is Mounted on Trailer and Part of Soil Remediation Process

Drive Unit and Bearing are Located Away from Intense Heat

Drive Unit and Bearing are Located Away from Intense Heat

As part of one of Endpoint’s collaboration with developers of proprietary, mobile waste-to-energy conversion systems, Endpoint needed a method to meter and elevate soil. The inclined screw feeder would be mounted on a trailer as part of a mobile processing plant and would be directly loaded by a small front-end loader to discharge soil into a process vessel operating at 1,300-degrees F.

Design Parameters

  1. Product Type: SOIL
  2. Material Density: 90 Lbs. per Cubic Foot
  3. Conveyor System Capacity: 675 Cubic Feet per Hour
  4. Duty: Intermittent

KWS Advantages

KWS engineers took Endpoint’s conceptual sketches and created 3D parametric models. Through the approval drawing process, engineers from KWS and Endpoint worked together to develop the ideal design. The inlet hopper was designed to fit within certain dimensional constraints. The 3D models verified stack-up height of the equipment and determined hopper inlet height as well as screw feeder incline angle and length so the equipment would fit on the trailer and work properly for the process.

KWS Special Features

KWS designed the discharge end of the screw feeder to operate at temperatures up to 1,300-degrees F. The screw, trough, and drive end components were fabricated from 304 stainless steel to remain uncompromised by the elevated temperature. To keep the overall project cost minimal, the balance of the feeder and hopper that are not exposed to elevated temperature was constructed from mild steel.

KWS utilized a slider base pedestal trough end to protect the end bearing from contamination and allow for thermal expansion. Expansion and contraction occur axially along the length of the screw and trough and is common in every high-temperature application. The KWS slider base trough end is designed for thermal expansion and can account for axial expansion up to 4 inches.

KWS designed the inclined screw feeder with a split tubular housing to improve efficiency by reducing clearance around the screw and housing when conveying free-flowing soil on a steep 35-degree incline. The KWS split tubular housing allows maximum access to internal components for cleanout and maintenance.

Testimonial

"Delivery was critical for us. KWS came through by shipping ahead of schedule. On top of that, the equipment looked great!"

Tim Naughton, P.E., Director of Operations and Engineering – Endpoint Consulting

KWS Slider Base Trough End Allows for up to 4-Inches of Axial Thermal Expansion

KWS Slider Base Trough End Allows for up to 4-Inches of Axial Thermal Expansion

Small Front-End Loader Deposits Soil in Hopper of Inclined Screw Feeder

Small Front-End Loader Deposits Soil in Hopper of Inclined Screw Feeder

Soil

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