Thickening and Clarification
During thickener operation, feed enters the feedwell, via a feed pipe or open launder. In order to promote settling, it is increasing to dissipate this energy. ... The mechanism consists of the drive with an optional lifting device, torque tube, rake arms, blades and bridge. MIP drive heads consist of a multi-stage planetary gearbox, hydraulic ...
Thickeners – MIP Process Technologies (Pty) Ltd
Rake arms and blades; Bridge; Underflow discharge arrangement; Dual feedwell; Overflow launders with s; Instrumentation . Thickener development and general history. Sedimentation technology was originally developed in the mining industry. Prior to the development of the continuous thickener, batch gravitational settling was employed. ...
Mining: the evolution of thickening rake mechanisms
The original thickener mechanism consists of a central drive shaft, two long rake arms, and two short rake arms, both with strut supports and tie rods "tying" the four arms together. The rake arms have scraper blades to move the material inwards, struts to give the arm vertical support, and tie rods to distribute the torque load evenly ...
Industrial Sedimentation and Filtration Equipment
For most biological applications, continuous spiral blades clean the entire tank bottom with each revolution of the rake arms. Thickening Posts Thickening posts extend the raking blades below the level of the rake arms, keeping the arms clear of the heaviest concentration of solids, thereby reducing torque on the drive unit. Pickets
Thickener parts
The rake mechanism consists of a series of rakes that are suspended from multiple rotating arms. As the arms rotates, the rakes move through the slurry and push them toward the center of the tank. Some of the main components are: …
Circular Thickener Clarifiers
A well-designed thickener provides storage and equalization, reduces the volume of sludge streams, and increases their solids concentrations. ... The rake employs multiple bottom scraping blades that are angled to ensure that all settling sludge is captured and brought to the central sludge well. ... floating matter is skimmed by a skimmer arm ...
Thickening and Clarification
Special attention is given to the design of the thickener feedwell (for high efficiency) and specially profiled rake blades for maximum transfer of viscous and heavy material at minimal torque consumption.
Clarifiers
Rapid sludge removal type with pipe arms, tapered rectangular suction arms and scraper type with multi-draw off pipes and visual sludge well are also available. Amwell produces a split ductile iron Class 6 precision gear (after heat treat) with replaceable races.
Efficiency of raking in gravity thickeners
Other important factors to consider are the relative delivery of neighbouring rake blades, drag forces that determine rake torque and the degree of "swirl" motion imparted to the bed. ... Frost et al. (1993) mathematically modelled the three-dimensional flow through a circular flat-bottomed thickener which had two rake arms with flat blades ...
Drive Units For Wastewater & Water Treatment | DBS
Almost all DBS drive units can be provided with a lifting mechanism that can raise and lower the rakes up to 36 inches (900 mm). Rake lifts operate by raising the output shaft into the drive unit on S-series models and raising the entire drive unit on D-Series models. The lift mechanism is fully contained within the drive unit.
Thickeners
Specifications and thickener rake design. All Thickeners have the same general specifications, varying only as to type of machine. The specifications given for one will cover all. ... settling characteristics that may require special rake construction such as blades located a distance below the rake arms on posts or spikes on the blades to cut ...
Conventional Gravity Thickeners
We custom design each conventional gravity thickener using customer specifications, standard methods, and computer software for proper sizing and drafting. ... A heavy duty drive unit with precision bearing and gear transmits torque through a steel center shaft to the rake arms. Equipped with Torkmatic drive control, the WesTech drive unit ...
Thickeners and clarifiers – water recovery – FLS
The spiral design of our thickener rake arm assembly reduces energy consumption, minimises downtime and enhances water recovery. Maintenance & Service of thickeners and clarifiers Thickeners will be in the field for decades, but sedimentary technology is constantly advancing.
FLS | Empowering the future of mining
FLS is a leading, full flowsheet minerals processing supplier to the global mining industry. We deliver proven technologies and services across the lifecycle of operations, and have set targets of providing solutions for zero-emissions mining by 2030 with our MissionZero programme.
FSI Analysis of Upset Loads Due to Material Build Up In …
FLS 45m deep-cone thickener (the world's largest DCT) and has the newly patented inner spiral rake blade technology with capability to produce 68wt% underflow on copper tailings. The rake mechanism is composed of four arms with a set of the patented inner spiral rake blades and driven by a hydraulic driving system.
Thickeners and clarifiers Complete range of reliable and …
Sizing and specifying a thickener can be challenging. Let our trained experts guide you through the available alternatives and help you select the thickener/clarifier best suited to your process …
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two rake arms with flat blades, but did not show any ... attached to the bottom of the 16 mm diameter rake support arms. The thickener model had two inter ...
FL Mining on LinkedIn: Thickener Spiral Rake Blade
Our new Thickener Spiral Rake Blade is a vital component that enhances the performance of your high-capacity thickener. With its improved raking capacity at lower torque, the Spiral Rake Blade is ...
Clarifier Designs & Services
manufacturers • Clarifier rebuilds CirCular Clarifiers & ThiCkeners • Chemical and petrochemical ... Rake Arm 304 Stainless Steel Scraper Blade Energy Disipating Inlet In˚uent Drive Platform Feed Well Scum Ba˜e V-Notched E˜uent ... A well designed thickener provides storage and equalization, and reduces the costs associated with de ...
Industrial Sedimentation and Filtration Equipment
The WesTech clarifier or thickener mechanism is . rotated by a peripheral drive located at the end of the access bridge which attaches to the rake arms. This configuration provides the most economical approach to mechanism construction for large-diameter units. A center column and pivot bearing support the cage and rake arms at the center of ...
Product datasheet Thickener Spiral Rake Blade: the …
directly toward the outlet without optimal time in the thickener. A common challenge with traditional thickener rakes is their inability to move mud evenly to the outlet. Uneven distribution causes lower-viscosity material to flow out too quickly, also known as ratholing. The spiral rake blade produces a denser material in the thickener.
Thickeners and clarifiers Complete range of reliable and …
central bearing about which the rake arms rotate. The centre pier also supports the rotating feedwell and partially supports the rake mechanism and access bridge. The bridge supports the feed pipe or feed open launder. At the tank perimeter, the full-radius rake arm is supported on and driven by the drive unit (tractor).
Thickeners – ClearStream
Low Profile Rakes. Low profile rakes are another option to reduce the torque required for thickening solids. Rather than the traditional rake cage design, the rake arm is constructed …
Drive Units
Drive Unit Types. Shaft Drive: A shaft drive is provided when the entire mechanism is supported by a full-span bridge. The bridge-mounted drive transmits power to the solids collecting rakes through a center drive shaft. WesTech offers many gear sizes driven by single or multi-pinion reducer stacks, to meet a wide range of process torque requirements.
Raking in gravity thickeners
Based on measurements made on full-scale thickeners, Günthert (1984) found that increasing either blade velocity or blade height would improve raking and movement of bed material to the underflow. Warden (1981) and Albertson and Okey (1992) developed single equation mathematical models for spiral rake blades to investigate transport. Warden modelled …
Thickener Equipment – Sevcorp Mining Equipment
A new generation thickener drive incorporating tested designs and modern technology. GO TO SEVPRO DRIVES Dorr-Oliver Drives Bridge-mount or column-mount type drives, Type-A, Type-S, lifting devices, slip-ring assemblies. ... installed and adjusted rake arms are critical to maximizing the thickening process. GO TO UNDERSOLUTION STEELWORK Our ...
Schematic of the small-scale thickener rake model and PIV …
Although thickener rakes are essential in the transport of bed material to the underflow, few details of the flow resulting from rake action in thickeners have been published.
Water and Wastewater Treatment
Circular Clarifier & Thickener Designs Grated Walkway Scum Trough Skimmer Arm E˜uent Trough Rake Arm 304 Stainless Steel Scraper Blade Energy Disipating Inlet In˚uent Drive Platform Feed Well Scum Ba˜e V-Notched E˜uent Launder Support Column Sludge Discharge Pit Scum Trough Energy Dissipating Inlet E˜uent Trough Rake Arm 304 Stainless ...
Thickeners
Rake blades designed for precise removal of solids without disturbing the settled solids. Low maintenance hydraulic drive base with torque and rake position monitoring capabilities. Drive …
High-Rate Thickeners
High-Rate Thickeners separate liquids from solids using hindered settling. Rotating rake arms collect settled sludge and move it toward the center discharge cone. They use minimal amounts of polymers/chemicals to drop the solids, …