Thickeners and Clarifiers

Thickener

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MEP Ltd supplies a comprehensive range of Thickeners & Clarifiers to satisfy most requirements and the designs are continually updated to meet today's standards and requirements.

The range is based on two types of mechanism:

• LSG Series Thickener rake Drive Mechanisms.
  A heavy-duty drive mechanism with automatic rake raise and lower
• X.L. Series Thickeners
  A heavy-duty but simple rake driving mechanism.

The LSG Series comprises a spurgear and pinion drive system with automatic raise and lowering of the rakes and specially designed to cope with conditions where fluctuations in the feed solids demand flexibility from the Thickener. Its design is heavy-duty to deal with the rigours of mineral processing.

There are three torque ratings available to accommodate various tank diameters up to 40 Metres:-

The principle features are:

The prime mover of these rake drive mechanisms is an electro-magnetic induction coupling, which also gives an indication of the torque loading on the rakes. A signal of the torque loading is transmitted to automatically control the height of the rakes.

As the load transmitted through the rakes reaches a pre-determined level the rakes raise to the top of the accumulated sludge. This enables the thickener tank to provide surge capacity at high feed conditions. When the torque on the rakes drops back, the rakes then follow the top of the sludge down until they reaches equilibrium at the lowest point.

In the unusual event of the rakes stalling, due to an excessive load or an obstruction, the main drive mechanism will slip, preventing damage to the rake arms.

There is also an audible alarm that gives warning of a build up within the tank.

X.L. Series of Thickener / Clarifiers

The XL series provides a rotation only mechanism for less arduous duties where fluctuations in the feed rate to the thickener can be handled by a variable speed underflow pump.

This model has been designed to meet the demand for a rugged but simple and cost effective unit.

The prime mover of these rake drive mechanisms is an electro-magnetic induction coupling, which also gives an indication of the torque loading on the rakes.

In the unusual event of the rakes stalling, due to an excessive load or an obstruction, the main drive mechanism will slip, preventing damage to the rake arms.

There is also an audible alarm that gives warning of a build up within the tank.

H.C. Thickeners.

The HC Thickener range is a complete free standing unit of mild steel construction incorporating our XL drive and consists of both tank, superstructure and drive mechanism mounted above ground on a prepared concrete slab. It is easily transported to site and quickly ready for use.

HC series tanks can be supplied from 2m diameter to 12m diameter and maybe designed around the specific requirements of the customer.

Tank Designs

We offer a wide range of standard as well as custom designed tank designs including:

• Mild steel conical (HC).
• Mild steel conventional with sloping base.
• Mild steel conventional with flat base.
• Mild steel shell walls mounted on a concrete base.
• The units can also be manufactured to fit a concrete tank provided by the customer.

General

The following points are worth noting:

• The feed rate to a Thickener and the settling rate of the solids will vary.
• Larger thickeners are better able to cope with higher feed rates.
• A larger Thickener will generally require less operator attention.
• You are unlikely to complain that your thickener is too big.