Several classifications of filter element types

Principles and differences between internal pressure and external pressure ultrafiltration membranes

1. PP filter element

PP filter element is also called PP melt-blown filter element. The melt-blown filter element is made of polypropylene superfine fiber hot-melt entanglement. The fibers randomly form a three-dimensional microporous structure in space. The pore size is distributed in a gradient along the filtrate flow direction. , fine and fine filtration in one body, can intercept impurities of different particle sizes. The precision range of the filter element is 0.5-100μm, and its flux is more than 1.5 times that of the peak room filter element with the same precision. It can be equipped with different types of end cap joints to meet the needs of various engineering installations.

2. Wire wound filter element

It is refined by finely winding textile fiber yarn with good filtration performance on a porous skeleton. The yarn materials include polypropylene fiber, acrylic fiber, absorbent cotton fiber, etc. By controlling the tightness and thinness of the yarn during winding, water purifier filter elements of different precision can be made, which can effectively remove suspended solids and particulate impurities in various liquids, and have a high purification effect on various liquids . Folded filter element

3. Folded microporous filter element

The pleated microporous filter element is a precision filter made of polypropylene (Polypropylene) thermal sprayed fiber membrane, nylon (Nylonb) polytetrafluoroethylene (PTEE) microporous filter membrane, etc., with small volume, large filtration area, The advantages of high precision. Filtration accuracy can range from 0.1μm to 60μm. The sealing of the end cover of the filter element and the connection of the overall structure adopt hot-melt bonding. There are three types of filter element joints that are commonly used internationally: 222 joints, 226 joints, and flat ports. The products have undergone strict and complete testing before leaving the factory to ensure the stable performance of the products.

4. Activated carbon filter element

There are two types of activated carbon filter products: compressed activated carbon filter and bulk activated carbon filter.

1. The compressed activated carbon filter element uses coal-based activated carbon and coconut shell activated carbon with high adsorption value as the filter material, and is sintered and compressed with a food-grade adhesive. The inside and outside of the compressed activated carbon filter element are respectively wrapped with a layer of non-woven fabric with filtering effect to ensure that the carbon element itself will not drop carbon powder. Soft nitrile rubber gaskets are installed at both ends of the carbon element to make the carbon element fit into the filter cartridge Has good sealing.

2. Bulk-type activated carbon filter element Put the required activated carbon particles into a special plastic shell, weld the end caps on both ends of the shell with welding equipment, and put the non-woven fabrics for filtering at both ends of the shell Filter, to ensure that the carbon core will not drop carbon powder and black water during use. According to the needs of customers, the shell end cover can be made into different types of connection ports. Interface methods include: flat pressure type, pipeline type (models: 4042, 4044, 4046, etc.).

Five, double section filter element

Last section: Polypropylene melt-blown filter element with a precision of 5 μm

Next section: Granular activated carbon filter with built-in activated carbon 170g

Material: ABS, PP

Length: 250mm Outer diameter: 70mm Flux: 8L/S Total flux: 6-8T

Activated carbon index: intensity>90; iodine value (mg/g)>950; methylene blue value (mg/g)>120

6. Ceramic filter element

Since the ceramic filter element is made of pure natural physical materials, it will not produce secondary pollution during the use of the water purifier. It retains beneficial minerals in water, effectively removes sand, bacteria, and rust, never clogs, has a long service life, and has excellent filtration effects. At the same time, it is not afraid of clogging and can adapt to very bad water conditions. At present, the ceramic filter element with the highest filtration precision in the world is a double control membrane ceramic filter element, with an average pore size of 0.1 μm. The water filtered by the filter element can be drunk without being boiled, and fully meets the national standard for direct drinking water.

7. Resin filter element

Resin is a porous, insoluble exchange material. The resin filter element in the water softener is filled with millions of tiny plastic balls (beads), all of which contain many negative charge exchange sites that absorb positive ions. When the resin is in its nascent state, these charge exchange sites are occupied by positively charged sodium ions. As the calcium and magnesium pass through the resin reservoir, they contact the resin beads, displacing the sodium ions from the exchange sites. The resin preferentially binds more strongly charged cations, calcium and magnesium ions being more strongly charged than sodium ions. The displacing sodium cations then travel down through the "resin" bed and out of the water softener, which sends out "soft" water. Eventually, all resin exchange sites are filled with calcium and magnesium and can no longer do their job.

Eight, titanium rod filter

The titanium rod filter element has excellent properties such as corrosion resistance, high temperature resistance, high strength, easy to ensure filtration accuracy, and easy regeneration; the titanium filter element is formed by forming titanium powder and sintered at high temperature, so the surface particles are not easy to fall off; the operating temperature in the air Up to 500~600°C; suitable for filtration of various corrosive media, such as: hydrochloric acid, sulfuric acid, hydroxide, seawater, aqua regia, and chloride solutions such as iron, copper, and sodium. It has excellent mechanical properties and can be machined for cutting, welding, etc. It has high compressive strength, and its internal pressure breaking strength can reach more than 2MPa; its filtration accuracy is easy to guarantee, and even if it works under high temperature and high pressure, the pore diameter will not be deformed. Its porosity can reach 35-45%, the pore size distribution is uniform, the dirt holding capacity is large, and the regeneration method is simple, and it can be reused after regeneration.

Nine, RO reverse osmosis filter

The filter element adopts RO reverse osmosis membrane. Reverse osmosis technology: The original text of reverse osmosis is REVERSE OSMOSIS, which is a collection of multinational scientists from the United States Space Agency, supported by the government, and spent billions of dollars after years of research. The principle of reverse osmosis is to apply a pressure higher than the natural osmotic pressure on the raw water side, so that the water molecules will reverse osmosis from the side with high concentration to the side with low concentration. Since the pore size of the reverse osmosis membrane is far smaller than hundreds or even thousands of times of the virus and bacteria, various viruses, bacteria, heavy metals, solid solubles, polluting organic matter, calcium and magnesium ions, etc. cannot pass through the reverse osmosis membrane at all. , so as to achieve the purpose of water softening and purification.

10. Stainless steel filter element

Features of stainless steel filter element:

1 Good filtration performance, uniform surface filtration performance for the filtration particle size of 2-200um

2 Good corrosion resistance, heat resistance, pressure resistance and wear resistance;

3 The pores of the stainless steel filter element are even and precise;

4 The flow per unit area of the stainless steel filter element is large;

5 The stainless steel filter element is suitable for low temperature and high temperature environments; it can be reused after cleaning without replacement.

Application: petrochemical, oilfield pipeline filtration; refueling equipment, construction machinery equipment fuel filtration; water treatment industry equipment filtration; 7 pharmaceutical and food processing fields; rated flow 80-200l/min working pressure 1.5-2.5pa filter area (m2) 0.01 -0.20 Filtration accuracy (μm) 2-200 μm Filter material Stainless steel braided stainless steel perforated mesh is used for pre-stage dewatering of heavy oil combustion system, and can also be used for chemical liquid filtration, with a precision of 100um. The filter element is made of stainless steel round microporous mesh. It is suitable for pretreatment and posttreatment systems in industries such as electronics, petroleum, chemical industry, medicine, and food. Further purify the water quality with low suspended impurities (less than 2~5mg/L).

11. Oil filter element

Filter elements of various specifications and materials, with a precision ranging from 0.5 to 80 m, meet the processing needs of different industrial and mining industries and various oil products.

12. Hydraulic oil filter element

The hydraulic oil filter element is mainly used to filter the oil in the hydraulic system, to remove particles and rubber impurities in the hydraulic system, to ensure the cleanliness of the hydraulic oil, so that the hydraulic system can operate normally.