Introduction to filter cartridge filter

Filter element filter is a commonly used solid-liquid or gas-solid separation equipment, widely used in chemical, pharmaceutical, food and beverage, environmental protection, water treatment, metallurgy, oil, natural gas, and other industries. Its working principle is mainly to capture solid particles, suspended solids, some colloids, and other impurities in the fluid (which can be liquid or gas) through the filter element, to achieve the purpose of purifying the fluid. The filtration accuracy is 1-5μm.

Filter element type filter composition

1. Filter shell: The shell is the shell of the filter-type filter, usually made of stainless steel, plastic (such as polypropylene, ABS, etc.), carbon steel, and other materials, with corrosion resistance, and pressure resistance characteristics. The housing is designed to be sealed to ensure continuous liquid flow and prevent leakage during filtration.
2. Filter element: The filter element is the core component of the filter, responsible for the actual filtration work. Filter material and structure are varied, according to the filter needs can choose a paper filter, metal mesh filter, sintered filter, fiber filter (such as PP melt-blown filter, wire wound filter), activated carbon filter, and so on. The selection of the filter element is determined by the desired filtration accuracy, fluid characteristics (e.g. chemical compatibility, temperature, pressure), and filtration purpose (e.g. particle removal, bacterialization, odor removal).
3. Top cover: The top cover is usually designed with an opening to facilitate the installation, replacement, and cleaning of the filter element. The top cover and the shell are connected through threads, fasteners, or flanges to ensure sealing.
4. Seals: including gaskets, O-rings, etc., used for sealing between the shell and the top cover or between the filter element and the shell to prevent leakage.
5. Import and export: the filter is usually equipped with a water inlet and outlet for liquid input and output, and interface size (such as 1/2", 3/4", 1", etc.) according to the actual application needs to be chosen to facilitate the docking with the pipeline system.
6. Bypass valve (optional): In some designs, a bypass valve will be installed, and when the filter element is blocked or needs to be replaced, the bypass valve can be opened to ensure liquid flow and avoid interrupting the process.
7. Transmitter or pressure gauge (optional): used to monitor the pressure difference before and after the filter, when the pressure difference reaches the set value, it prompts the user to clean or replace the filter element.
8. Slagging device (for some types): In some designs, such as bag filters or equipment with an automatic slagging function, there will be a special slagging device to facilitate the cleaning of solid impurities accumulated during the filtration process.
In addition, according to the size of the filter element, the stainless steel filter type filter can be divided into 10 ", 20 ", 30 ", and 40 "filters. The number of filter elements can be divided into single-core, double-core, and multi-core. In the direction of liquid inlet and outlet, it is divided into side-in bottom-out type and bottom-in bottom-out type. Filter material is high-quality stainless steel, such as 304, 316, 316L, and so on.

Filter element filter for the industry

Filter type filters because of their efficient, reliable, adaptable characteristics, have become indispensable water treatment equipment in many industries, filter type filter with their wide applicability and efficient filtration performance, in almost all industrial fields, The water treatment industry has its figure, such as Water treatment industry, food and beverage industry, pharmaceutical and biotechnology industry, chemical and petrochemical industry, electronic semiconductor industry, oil and gas extraction and processing, paper and textile industry, environmental protection, and water recycling.

Based on physical interception and screening, its core uses the pore structure of the filter material to block and trap solid particles, suspended substances, or some macromolecular substances in the fluid (such as water, air, or other liquids), to achieve the purpose of purifying the fluid. The specific workflow is as follows:
1. The introduction of liquid: The fluid to be filtered enters the equipment from the inlet of the filter, and the suspended matter, particulate matter, or impurities carried by the fluid enter together in this process.
2. The filtration process through the filter element: the fluid passes through the filter layer of the filter element under the action of pressure (can be the negative pressure formed by gravity, pump pressure, or vacuum). The filter material has different pore sizes and structures depending on the type and size of impurities that need to be removed. Such as PP cotton filters, activated carbon filters, melt-blown filters, etc., can intercept particles of different sizes.
3. Interception and filtration: the pores or micropores on the surface of the filter element only allow substances smaller than the aperture to pass through, while particles, suspended matter, or some macromolecular substances larger than the aperture are blocked on the outer surface of the filter element or inside the deep layer to form a filter cake layer, which realizes solid-liquid or gas-solid separation.
4. Export of clean fluid: After the filter element screening of clean fluid, its impurity content is greatly reduced, and discharged from the outlet of the filter, to achieve the purpose of purification.
5. Impurity treatment: As the filtration process continues, more and more impurities accumulate on the surface of the filter element, forming a filter slag layer, which will gradually increase the resistance of the fluid and reduce the filtration efficiency. Therefore, the filter element needs to be cleaned regularly (such as backwashing, and chemical cleaning) or replaced to maintain the filtration effect and efficiency.
6. Filtration accuracy: The filter type filter has a wide range of filtration accuracy, which can be from the micron level (such as 0.5 micron, 5 micron, etc.) to the nanometer level, and different application fields and needs will choose different precision filters.