Pulse Discharge Candle Filter

Sophisticated system

No moving parts, bright filtration results. Low operational costs.

High flow rates

The smart design of the filter candles offers a low internal pressure which results into high flow-rates.

Immediate clear filtrate

Various filter media can be applied depending on the type of filtration and cake properties. A range of conventional materials such as PP, Teflon, PE are available. Alternatively Sintered porous SS or sintered mesh can be used down to 1 µ.

Dry or wet cake discharge

The filter cake can be recovered as a dry cake. Alternatively the filter cake can be discharged as a slurry.

Totally enclosed construction

Prevents evaporation, leakage and fumes from escaping, no contamination by air. Permits clean  and environmental friendly operation.

Automation

Full PLC automation enables repeatability and a reliable control of the filtration process.

Engineered System

Skid built single-source solutions for complete filter installations, including valves, instrumentation, piping, pumps, containment systems and PLC control can be supplied. The units are a modular design that is easy to transport and to assemble on site.

Principle of Operations

The Twin Process Filtration Pulse Discharge Candle Filter is a high-tech self cleaning candle filter, consisting of vertically positioned filter candles in a vertical tank. The filter candles can be supplied in polypropylene, PVDF  or stainless steel. The candles are installed in several manifolds having individual filtrate outlet. The filter medium that is used to cover the filter candles can be chosen such that a clear filtrate is instantly obtained.

Filtration

The liquid to be filtered enters the vessel and flows from the out side to the inside through the filter cartridge. The filtrate flows down to the bottom of the candle and rises through the central tube in the outlet manifold. The particles are collected on the outside of the filter cloth and form a regular filter cake.

Cake Discharge

After drying the filter cake the cleaning is done by a Back Wash or a Back Pulse with air or gas. The back pressure blows up the filter cloth  and brings the filter cloth in the original circumference. The pulsating back pressure opens the mesh of the cloth resulting in a very thorough cleaning. Because the filter candles are positioned on separate manifolds, they can be cleaned one manifold at a time. This decreases the quantity of air or inert gas required, and ensures that the cake is evenly discharged.

Practicability

The Twin Process Filtration Pulse Discharge Candle Filter offers an ideal solution for environmental friendly filtration processes, with perfect results. The reason for this is their automation, reproducibility and wide range of filter media. These filter media are available with a retention
of 1 µm and above.
The PDC Filter can be utilized for various production processes in the chemicals, mining, food- and pharmaceutical industries.