The Delkor High Rate Thickener is a proven performer in a variety of different applications – including minerals, industrial, chemical, water treatment and waste water industries. The reliability and performance of Delkor thickeners has meant that they are represented right round the world.
With a wealth of experience and a large database of results means that sizing of a thickener for most applications is a simple task. Bench scale testing on representative samples is generally all that is required to size a thickener. Delkor can also do site pilot tests, should the client require a more definitive outcome.
Benefits
• Low Capital Cost
• Smaller Footprint
• Bolted Tank Design Available
• Reduced Inventory of Solids
• Effective Flocculant Use
• Installed Units up to 100m Diameter
• FEA Design Capabilities
• Low Friction Rake Lift
• Highly Automated
General operation of High Rate Thickener
The High Rate Thickener functions on the following principles:
• The inlet feed is diluted to its optimum / effective flocculation level for high throughput of solids
• Flocculated particles settle through the hindered settling zone with higher densities occurring in the compression zone
• Rakes push the compressed material to the centre for withdrawal. The rakes also aid in the dewatering of the material
• The clarified liquor discharges into a circumferential launder at the top of the tank.
Control philosophy
The typical control of a high rate thickener is as follows:
• Bed Underflow density to control underflow slurry withdrawal. Bed mass pressure (optional)
• Flocculant dosing is controlled by means of a bed level detection device
• Torque is monitored using hydraulic pressure or electric current
• Overflow clarity is measured using a turbidity device as an option.