Micronics is the world-wide authority on filter presses and advanced liquid filtration technology. Here, we'll explore the question ' how does a filter press work? We will also examine the applications where they are most frequently utilized, and some of Micronics' standard and custom filter press solutions.

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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, 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. Micronics, Inc. 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. These include configurations such as sidebar automatic, manual overhead, automatic dual overhead beam, stainless steel clad, explosion-proof filter presses, vacuum filter presses, and hand filter presses.

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?

The working principle of filter presses is that slurry is pumped into the machine such that solids are distributed evenly during the fill cycle. Solids build up on the filter cloth, forming the filter cake; the filtrate exits the filter plates through the corner ports into the manifold, yielding clean filtered water.

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 chock-full of solids, forming the cake. Once the chambers 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. Some filter presses are specifically designed for fully automatic, 24-hour operation in a harsh environment such as mines or chemical manufacturing plants.

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Filter Press Applications

Filter presses can be built in a wide range of sizes, from small, lab-scale 150 mm presses, to those with much larger capacities, such as those with and mm filter plates. Filter presses are used for liquid/solid separation in an extensive range of industries and applications including:

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.

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Contact the Experts at Micronics

If you're interested in learning more about how a filter press could be customized for your specific application, contact Micronics, Inc. today. Or we may have just the right standard or used filter press in-stock to meet your needs today. Contact Micronics, Inc. today and benefit from our engineered filtration experience.

The working principle of chamber filter press

The structure and working principle of the chamber filter press are similar to those of the plate and frame filter press. The difference is that the filter plates are recessed on both sides, and each two filter plates are combined into a single chamber filter chamber, eliminating the filter frame, and the filter plate center has a The round hole suspension thus flows into each of the filter chambers. This filter is suitable for suspensions that require filtration at higher pressures without the need for washing of the filter residue.

Chamber filter press workflow

Under the pressure of the feed pump, the liquid to be filtered is sent to each filter chamber, and the solid and liquid are separated by a filter medium (selecting a suitable filter cloth according to different industries). The filter residue is formed on the filter cloth until the filter chamber is filled to form a filter cake. The filtrate passes through the filter cloth and flows along the filter plate groove to the lower liquid outlet channel to be discharged. After the filtration is completed, the filter residue can be washed by washing water.

After washing, compressed air is sometimes introduced to remove the remaining washing liquid. After the filtration, the filter press is opened to remove the filter cake (the filter cake is stored between two adjacent filter plates), the filter cloth is cleaned, and the plate is re-pressed to start the next working cycle.

Safe operation of the filter press

1. Use the filter cloth correctly. At the end of each work, the filter cloth must be cleaned so that no residue remains on the surface of the cloth. The filter cloth is hardened to soften, and if it is damaged, it should be repaired or replaced in time.
2. Pay attention to protect the sealing surface of the filter plate, do not collide, stand upright when placed, can reduce deformation.
3. The fuel tank is usually cleaned once every six months, and the hydraulic oil in the fuel tank is replaced. When the liquid level is lower than the lower limit, the oil should be replenished.
4. The temperature of the liquid to be filtered should be '100 °C. The mixture should not be mixed with debris and hard materials to block the feed port to avoid damage to the filter cloth.
5. Valves such as feed liquid and washing water must be opened and closed according to the operating procedure. The feed liquid and washing water must not enter at the same time. After the end of the work, the remaining liquid in the road should be placed as much as possible.
6. Keep the machine clean and keep the workplace clean and the road open. Do not step on the pipes and valves to avoid bending and making an excuse for dripping.