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Range of products

 

EPS Main Parts



Prefilter
Axial Fans
Electrostatic Precipitator
Automatic Washing System
Waste Water Treatment System
Automation System / Power Supply




Prefilter


The prefilters can either be panel filters (mechanical filter) for removing dust,


(V-shaped mechanical filter)

or inertial maze filters (active filters) with their own fans. The active front filter used is of the inertial type. The inertial filter operates on the principle of inertial separation. As the mixture of dust and air enters the inertial, most of the air changes direction, separating itself from the dust as it passes through the vanes. Due to its greater mass and inertia, the dust continues in a straight line with 10% of the incoming air being drawn through the bleed slots and eventually it is discharged into a secondary dust collector tank.

The choice of front filter depends on the installation requirements. The front filter is produced by subcontractors, and is installed by CTA. The calculation of the front filter's dimensions is done by CTA in accordance with the total system requirements. The front filters can be delivered in different materials depending upon customer
requirements.

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Axial Fans



The axial fans in each system draw polluted air from the tunnel into the filter system and returns cleaned air to the tunnel.

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Electrostatic Precipitator


CTA's electrostatic precipitator, ceiling mounted

The Electrostatic Precipitator cell is built from stainless steel and aluminium. Each filter cell weighs approximately 80kg. The EP-System is built of a modular design. The filter array can fill the entire cross section of the bypass tunnel to provide maximum efficiency versus velocity.


The corona shown at one section of the EP is generated by the CTA's High Efficiency
Spike Ionizer System.


The prefilter collects the larger dust particles. These particles are discharged into the
dust collecting tank.

The fine dust particles pass through a strong electrostatic field where they are electrically charged. In the subsequent collector with interleaved plates, the charged particles accumulate while the cleaned air passes through with little pressure drop. At regular intervals, a fully automated washing system flushes the collector plates with detergent and water. The water is collected in tanks where the particles are settling or removed by filtration. The sludge is deposited f.i. in industrial waste deposits.

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Automatic Washing System

The washing system consists of water- and detergent supply tank, air to water heat pump for heating the water, a water pump system, a dosing pump for detergents as well as a pipe distribution system for the correct washing of the electrostatic filters. CTA delivers its own produced detergent that is environmentally friendly.

After the automatic washing of the filters, the dirty water is either conducted to its own sedimentation tank or it can be re-used by using the waste water treatment system.

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Waste Water Treatment System

Some years ago CTA finished a project in cooperation with the Norwegian company Downstream AS. The aim was to find a waste water treatment system that could be adapted to the individual needs of CTA's clients. The waste water treatment system is divided into two parts and recirculates the contaminated water that comes back form the automatic washing process. The system is compact and includes both a feed and a return tank. The tanks are dimensioned with reference to the water needed for the automatic cleaning of the electrostatic filters.

CTA is the first company world-wide that uses this type of waste water treatment system commercially.

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Automation System / Power Supply


Picture of the new generation CTA Power Supply

CTA delivers a certain amount of power supply cabinets and one main control cabinet. The main control cabinet includes a PLC for all system functions. CTA uses a control cabinet from the Swiss Sauter AG. Sauter's automation systems are simple to use, minimize energy costs and are flexible. This enables CTA to customize the automation system to the individual end-user.

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