INTRODUCTION

Filter plates and filter frames are usually made of high-strength materials such as polypropylene, cast iron, or stainless steel. These materials have good compressive strength and corrosion resistance and can adapt to the processing requirements of materials with different properties. The surface of the filter plates has fine textures and filter holes, which can effectively intercept solid particles, while the filter frames play a role in supporting and containing the filter cake. The pressing device is a key part to ensure the normal operation of the equipment. It applies sufficient pressure through hydraulic or mechanical means to make the filter plates and filter frames fit tightly together to prevent filtrate leakage. The main beams provide a stable structural support for the entire equipment, and the filtrate collection system is responsible for collecting the filtrate obtained after filtration to ensure the smooth progress of the separation process.

This equipment comes in a variety of specifications and can be flexibly selected according to factors such as the amount of materials to be processed, the size of solid particles, and filtration requirements. It is widely used in many industries such as chemical, pharmaceutical, food, and environmental protection. It is relatively simple to operate and has a remarkable separation effect, making it a reliable choice for achieving efficient solid-liquid separation.

WORKING PRINCIPLE

The working principle of plate and frame filter presses is based on the pressure difference to promote solid-liquid separation. First, the materials to be filtered are transported to the filtration chambers composed of filter plates and filter frames through the feed pump.

During the feeding process, the materials are evenly distributed in each chamber under pressure. As the materials continue to fill, the filtrate, driven by the pressure difference, begins to pass through the filter holes on the filter plates and flow along the preset filtrate channels on the filter plates to the filtrate collection system. Meanwhile, solid particles are retained in the space formed by the filter plates and filter frames and gradually accumulate to form a filter cake. When the pressure in the filtration chamber reaches a certain level and the flow rate of the filtrate slows down significantly, it indicates that the filtration process is basically completed. At this time, by loosening the pressing device and pulling the filter plates apart one by one, the filter cake will adhere to the surface of the filter plates and can be easily cleaned and collected, completing the solid-liquid separation operation. After that, the cleaned filter plates and filter frames can be reassembled for the next round of filtration operations. The whole process is carried out in an orderly manner and can effectively separate the solid and liquid components in different materials.

MAIN PERFORMANCE AND CHARACTERISTICS

l High-Efficiency Separation Capacity: Thanks to the reasonable structure of the filter plates and filter frames and the applied external pressure, it has an excellent separation effect on the solids and liquids in various materials. Whether it is a chemical slurry containing fine particles or a high-viscosity food raw material liquid, it can effectively intercept the solid impurities therein and obtain relatively clear filtrate, meeting the requirements of the subsequent process for the material state and greatly improving the product quality and production efficiency.

l Good Adaptability: Different filter plate and filter frame materials and specifications can be flexibly selected according to different material characteristics, processing scales, and filtration precision requirements. The pressure of the pressing device can also be adjusted to adapt to the solid-liquid separation needs in various industries and under different working conditions. For example, it can play a good role in processing drug extracts in the pharmaceutical industry and dealing with reaction products in the chemical industry, with strong versatility.

l Stable and Reliable Operation: It adopts durable materials and a mature mechanical structure design. The key components are of reliable quality and are not prone to malfunctions during long-term operation. Moreover, it can withstand relatively large pressures and can still work stably in the face of changes in material flow and concentration, continuously providing a stable solid-liquid separation effect for production, reducing production interruptions caused by equipment problems, and the maintenance cost is also relatively low.

l Simple and Easy Operation: The operation process of the equipment is relatively intuitive and simple. Workers only need to control basic links such as feeding, pressing, loosening, and filtrate collection. There is no need for complex professional knowledge and skills. Ordinary personnel can master the operation method proficiently after simple training, facilitating its quick deployment in various production sites and improving the overall work efficiency.

l High Solid Content in Filter Cake: Due to the application of certain pressure during the filtration process, solid particles can be closely piled up to form a filter cake, and the solid content in the filter cake is relatively high. This is very beneficial for some situations where the solid components need to be further processed or recycled. For example, after dewatering the tailings in the mining industry, it is convenient for the subsequent disposal of tailings and resource recovery.

APPLICATION FIELDS AND INDUSTRIES

l Chemical Industry: In chemical production, a large amount of mixed liquids containing various chemical substances are generated, such as reaction liquids in dye synthesis and mother liquors in catalyst recovery. Plate and frame filter presses can perform solid-liquid separation on these mixed liquids, recover solid components such as catalysts and unreacted raw materials, and obtain pure filtrate at the same time, facilitating subsequent product purification and wastewater treatment processes, improving resource utilization rates, and reducing waste emissions.

l Pharmaceutical Industry: The pharmaceutical process involves numerous extraction and purification steps, and solutions containing drug components and impurities will be generated. Using plate and frame filter presses can accurately separate the drug solid particles and remove impurities, ensuring the purity and quality of drugs, meeting the strict regulatory requirements of drug production, and providing a powerful guarantee for people's drug safety.

l Food Industry: In food processing, raw material liquids containing solid residues will appear in processes such as fruit juice production and starch extraction. This filter press can effectively remove these solid impurities and obtain clear filtrate, improving the quality and taste of products. Meanwhile, for wastewater treatment in food processing, it can also reduce the pollution load of wastewater through solid-liquid separation, helping with environmental protection.

l Environmental Protection Field: In sewage treatment and sludge dewatering, plate and frame filter presses play an important role. They can efficiently dewater the sludge in sewage, reduce the moisture content of the sludge, reduce the volume of the sludge, facilitate subsequent transportation, landfill or incineration and other treatments, and the separated clear water can also be further reused or discharged up to standards, which has a positive significance for protecting the environment and conserving water resources.

SUMMARY

Plate and frame filter presses, with their unique structure, reliable working principle, and many excellent performance characteristics, have shown indispensable value in the solid-liquid separation work in many important fields such as chemical, pharmaceutical, food, and environmental protection. They are like the powerhouses in solid-liquid separation, quietly contributing to improving production efficiency in various industries, ensuring product quality, and promoting the development of the environmental protection cause. With the continuous progress of science and technology, it is believed that plate and frame filter presses will continue to make breakthroughs in aspects such as improving filtration precision, increasing the degree of automation, and expanding applications, further meeting the increasingly diverse solid-liquid separation needs of society and becoming one of the key supporting equipment for creating a high-quality production environment and facilitating sustainable development.