Solid liquid filtration method, is a widely used separation technology in modern industry. Solid liquid filtration method is a process of solid-liquid separation by physical means, such as the blocking effect of filter media, so that the solid particles in the suspension are retained, while the liquid phase flows out through the media.
In chemical production, press filter is widely used in solid liquid filtration process as an efficient solid-liquid separation equipment.
Principles
Solid-liquid filtration methods are based on the following principles:
Retention: The filtration medium has a certain pore size and can retain solid particles larger than its pore size, while allowing the liquid phase to pass through.
Gravity: Under the effect of gravity, solid particles in suspension will be deposited on the surface of the filter medium, forming a filter cake.
Surface tension and adhesion: the liquid phase will be affected by surface tension and adhesion when it passes through the filtration medium, these forces help to maintain the continuity of the liquid phase and promote solid-liquid separation.
The Process
Solid-liquid filtration methods usually include the following steps:
Pre-treatment: The suspension is pre-treated, such as adjusting the pH value, adding filter aids, etc., in order to improve the filtration effect.
Filtration: The suspension after pretreatment is introduced into the filtration equipment, and the solid-liquid separation is achieved through the retention effect of the filtration medium.
Washing and de-liquefaction: the solid particles retained on the filter media are washed to remove the impurities attached to the particle surface, and the water content of the solid particles is further reduced through the de-liquefaction step.
Collection and Disposal: The separated solid particles and liquid phase are collected and subsequently disposed of or recycled as required.
Fields of application
Solid-liquid filtration methods have a wide range of applications in modern industry, including but not limited to the following fields:
Metallurgical industry: for solid-liquid separation in the process of ore treatment, metal smelting, etc.
Chemical industry: used for solid-liquid separation in the process of chemical production, raw material treatment, product refining and other aspects of the solid-liquid separation.
Environmental engineering: in the field of water treatment, wastewater treatment, etc., for the removal of suspended matter, suspended particles and other pollutants.
Food industry: in the process of food processing, for fruit juice clarification, beer filtration and other aspects of solid-liquid separation.
In which industries are industrial filter presses widely used?
Industrial filter presses are widely used in a number of industries due to their efficient solid-liquid separation capabilities. The industrial filter press plays a pivotal role across various sectors, including the chemical industry where it is employed for the filtration of chemical raw materials and the separation of refined products; in the environmental protection industry, it aids in water treatment and wastewater treatment processes to efficiently remove suspended solids and sludge; within the metallurgical industry, it facilitates solid-liquid separation during ore processing and metal smelting; the food industry utilizes it for solid-liquid separation and clarification in industries such as sugar, wine, and dairy production; and finally, in the pharmaceutical industry, it serves as a crucial tool for the filtration and purification of active pharmaceutical ingredients (APIs) and intermediates.
At Jingjin, we understand the importance of precision and efficiency in solid-liquid separation. That’s why our filter presses are crafted with meticulous attention to detail, using advanced materials and innovative designs. Whether you’re looking to purify chemical raw materials, treat wastewater, refine ore, clarify beverages, or purify pharmaceutical intermediates, Jingjin filter presses offer unparalleled performance and versatility.