Filter Presses & Waste Water


WHAT IS A FILTER PRESS AND HOW DOES IT WORK?

 

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Perhaps you don’t fully understand how the technology or filtration equipment works or how it could help your operation – we will try to examine these details further.

Zinkan is the dedicated authority on filter presses and advanced liquid filtration technology for the use in a variety of waste water applications.


What is a Filter Press?

A filter press is a piece of equipment used in liquid/solid separation. Specifically, the filter press separates the liquids and solids using pressure filtration across a filter media, wherein a slurry is pumped into the filter press and is dewatered under pressure. Basically, each filter press is designed based on the volume and type of slurry that needs to be dewatered. Zinkan is a trusted expert in liquid/solid separation and offers a wide range of filter press types and capacities to suit specific application needs for trouble-free, economical dewatering.

 

The four main components of a filter press include the frame, filter plates, manifold (piping and valves), and filter cloth, a key ingredient for optimizing filter press operations.

 

How Does a Filter Press Work?
FILTER_PLATE_FILLING_2.PNGSimply stated, slurry is pumped into the filter press and the solids are distributed evenly during the fill cycle. Solids build up on the filter cloth, forming the filter cake in the void volume of the plate. The filtrate, or clean water, exits the filter plates through the ports and discharges clean water out the side of the plates.

 

Filter presses are a pressure filtration method and as such, as the filter press feed pump builds pressure, solids build within the chambers until they are completely full of solids, forming the cake. When the plates are full, the cycle is complete and the filter cakes are ready to be released. In many higher capacity filter presses, fast action automatic plate shifters are employed, speeding cycle time. All Zinkan filter presses are specifically designed for fully automatic, 24-hour operation in a harsh environment such as mines or chemical manufacturing plants.

 

Filter Press Applications
Filter presses can be built in a wide range of sizes, from small, lab-scale presses, to those with much larger capacities, such as those with 2000x2000 mm plates. Filter presses are used for liquid/solid separation in an extensive range of industries and applications from food and beverage processing to chemical manufacturing, mining, power generation, aggregates, asphalt and cement production, steel mills, and municipal plants.

 

Customizing A Filter Press for Your Application Needs
The industry, application and operational considerations will guide specifics such as the overall design, filtration capacity, number of chambers, filter plate size, materials of construction, as well as additional features/systems such as automatic plate shifters, cloth washing system, drip trays, cake shields and safety light curtains. Design of a filter press depends on a host of factors such as filtration cycle time, cake dryness required, cloth life, whether manual or automated plate shifting is desired, and many other factors.