Solid Liquid Separation
Solid liquid separation solutions from Evergreen enable optimal dewatering and metals recovery in chemicals and mineral processing markets.
Solid/Liquid Separation
Evergreen designs, builds, manufactures, installs and maintains equipment throughout the entire value chain of mineral processing plants across all commodity sectors, from diamonds to coal, gold, iron ore, platinum and phosphates.
- Leading range of Crusher, Ball Mill, Flotation Components, Filter Presses and Slurry Pumps
- Maximise processing plant utilisation to reduce overall plant costs
- Providing end-to-end mineral processing solutions and services
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Solid Liquid Separation Solutions
Filter Press
Filter presses are proven effective on hundreds of applications across many markets and are capable of dewatering particle sizes down to 1 micron.
Filter Press Plates
Filter press plates must be strong and oftentimes, corrosion-resistant. They must also be able to withstand extremely high pressures and high volumes (throughput) of slurry.
Filter Cloths
Filter Cloths are a variety of materials such as nylon, polyester, polypropylene and more technical and expensive materials such as PPS, E-CTFE, PEEK, PTFE.
Filter Press Accessories
We also offer parts for filter plates, including plate handles, plate plugs, cloth dog pegs and caps, and plate shifters.
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Filter Press Application
Mineral Processing
Filter Press is used in processing plants of the mining industry, The most frequent applications are the dewatering of fine coal and coal tailings (finest fractions) as well as the solid-liquid separation of the ore concentrate suspension concentrated by flotation and subsequently separated from mineral by-products.
At this point, metals such as zinc, iron and copper are extracted, but precious metals such as gold, silver and platinum are also extracted in corresponding mines in the form of a puncture-proof filter cake.
Environment Water Treatment
Due to the high degree of dewatering requirements and the high filtration quality, filter presses with specific membrane filter plates (membrane filter presses) are preferably used as mechanical solid/liquid separation units in the field of water and waste water treatment.
The filter cake formed after filtration must have the highest possible dry matter content (DM content) due to the final disposal. This reduces the associated follow-up costs for disposal to a minimum.
Food and Beverage
The food and beverage industry places high demands on the filtration systems and filter press architectures used with regard to high DM contents, optimum washing results and uniform cake structure. The aim is to achieve the highest possible end product quality, regardless of the working temperature.
Chemical Manufacturing
The chemical and petrochemical industry places high demands on filtration systems and filter press architectures used with regard to chemical resistance and the relevant filtration parameters in order to achieve the highest possible end-product quality.
As a result, durable, safe and efficient technology solutions as well as optimised and efficiently designed process parameters are critical for chemical processing applications.
Pharmaceutical
In the pharmaceutical industry, filter presses are commonly used for small-scale filtration applications in research and development, quality control, and small-scale production.
Industry knowledge
What is solid-liquid separation?
Solid-liquid separation refers to the process of separating particles or solid substances from a liquid phase. This separation is commonly employed in various industrial, environmental, and laboratory processes to achieve different objectives, such as purification, concentration, or waste treatment. The goal is to isolate the solid particles from the liquid, resulting in a clarified liquid and a separated solid phase.
How can you separate solid and liquid waste?
Separating solid and liquid waste is an essential step in waste management to facilitate proper disposal, recycling, or treatment of each component. Several methods can be used for solid-liquid waste separation:
- Gravity Settling / Sedimentation: Allow the waste mixture to stand in a container, allowing solid particles to settle at the bottom due to gravity.
The clarified liquid can then be carefully poured or siphoned off, leaving the solid waste behind. - Filtration: Pass the waste mixture through a filter medium (like a mesh, cloth, or paper) that allows liquid to pass through while retaining solid particles. Filtration can be done using various setups, including simple funnel and filter paper arrangements or more advanced filtration systems.
- Centrifugation: Use a centrifuge to subject the waste mixture to high-speed rotation, causing solid particles to move outward and settle at the bottom of the centrifuge tube. The clarified liquid can be decanted or piped off from the top.
- Settling Tanks / Clarifiers: Employ settling tanks or clarifiers to allow larger solid particles to settle at the bottom while the clarified liquid overflows or is drawn off from the top. This method is often used in wastewater treatment plants.
- Filtration through Membranes: Use membrane filtration techniques such as microfiltration, ultrafiltration, or reverse osmosis to separate solid particles from liquids based on size or other properties. These methods are commonly employed in more advanced and precise separation processes.
- Dewatering:Remove excess water from the solid waste to concentrate it and make disposal or further processing easier. Dewatering methods include mechanical pressing, squeezing, or using specialized equipment like filter presses.
- Flotation: Introduce air bubbles into the waste mixture, causing certain solid particles to float to the surface. The floating solid layer can be skimmed off, leaving behind the clarified liquid.
What equipment separates solids from liquids?
Various types of equipment are used for separating solids from liquids, and the choice of equipment depends on factors such as the nature of the materials, particle size, concentration, and the desired level of separation. Here are some common types of equipment used for solid-liquid separation:
Filtration Equipment:
Filter Press: A device that uses pressure to squeeze liquid out of a slurry, leaving a cake of solid material. It consists of a series of filter plates and frames.
Centrifuge: This high-speed rotating device uses centrifugal force to separate solids from liquids. The heavier solid particles move outward and settle at the bottom, while the clarified liquid is collected.
Sedimentation Equipment:
Clarifier or Settling Tank: Large tanks where solid particles settle at the bottom due to gravity. The clarified liquid is drawn off from the top.
Dewatering Equipment:
Belt Filter Press: A device that squeezes liquid out of sludge or slurry using a series of belts and rollers.
Screw Press: Utilizes a screw mechanism to dewater sludge or slurry.
Flotation Equipment:
Dissolved Air Flotation (DAF) Unit: Introduces air bubbles into a liquid to float solid particles to the surface, where they can be skimmed off.
Hydrocyclones:
Hydrocyclone: A device that uses centrifugal force to separate solid particles from liquid in a slurry. It is commonly used in mineral processing and wastewater treatment.
Cyclonic Separators:
Cyclone Separator: Separates solid particles from a gas or liquid stream using vortex separation. It’s often used in industries such as petrochemicals.
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