The filter element liquid filter is a new type of multi-functional filter, which consists of two parts: filter and filter element. It has been widely used in water, oil, paint and other liquid purification and solid-liquid separation in machinery, metallurgy, chemical industry, textile, printing and dyeing, electroplating, medicine, food and other industries.
1. Working principle of filter element filter
As shown in the figure, the liquid to be filtered is pressed into the filter inlet, passes through the filter element from the outside to the inside of the filter layer, and is filtered into a clear liquid, and is then discharged through the outlet. Impurities are trapped in the deep layer and surface of the filter element, so that the liquid is filtered.
1. Inlet of liquid to be filtered
2. Clear liquid discharge port
3. The size, structure and size of the filter element at the drain (sewage) port depend on the design flow rate and the media characteristics of the filtered liquid. The filters are made of high-quality stainless steel and have a reasonable structure. They are not only small in size, low in cost, and large in flow, but also easy to maintain, replace cores, and assemble. The filtration precision is 0.5-100um and the flow is 0.5-200m3/h. Products of different sizes can also be produced according to user needs.
The number of filter elements inside the filter. The filter cartridge can be equipped with 1 core, 3 cores, 5 cores, 7 cores, 9 cores, 11 cores, 13 cores, 15 cores, etc.
Pleated filter element lengths are 10, 20, 30, and 40 inches
Cartridge filter
II. Technical parameters of filter element filter
Filtering precision:0.1-100um
Processing capacity:0.5-200m2/h
Maximum working pressure: 0.4-10MPa
Maximum operating temperature: 80-120 °C
Three. Classification of filter elements
Cartridge filters can be divided into the following types according to the commonly used types of filter cartridges:
PP filter element filter
PP filter element is also called PP melt-blown filter element. Melt-blown filter element is made of hot-melt entangled polypropylene ultra-fine fibers. The fibers randomly form a three-dimensional microporous structure in space. The pore size is gradient distributed along the flow direction of the filtrate, focusing on the surface and deep layers. , fine filtration in one, which 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 of the same precision. Different types of end cap joints can be configured to meet the needs of various engineering installations.
Wire-wound element filter
It is made of textile fiber yarns with good filtration performance precisely wound on a porous skeleton. Its yarn materials include polypropylene fiber, acrylic fiber, absorbent cotton fiber, etc. By controlling the winding tightness and density of the yarn during winding, filter elements with different precisions can be made, which can effectively remove suspended solids, particle impurities, etc. from various liquids, and have a high purification effect on various liquids.
Pleated element filter
The pleated filter element is a precision filter device made of polypropylene (Polypropylene) thermal spray fiber membrane, nylon (Nylonb) polytetrafluoroethylene (PTEE) microporous filter membrane and other filter media. It has small size, large filter area and high precision. advantage. Filtration accuracy ranges from 0.1μm to 60μm. The filter element end cover seal and overall structural connection are all made of hot melt bonding. There are three types of filter element connectors commonly used internationally: 222 connector, 226 connector, and flat mouth. Products undergo rigorous and complete testing before leaving the factory to ensure stable product performance.
Activated carbon filter
There are two major categories of activated carbon filter products:
Compressed activated carbon filter element, bulk activated carbon filter element.
A. The compressed activated carbon filter element uses coal-based activated carbon and coconut shell activated carbon with high adsorption value as filter materials, and is sintered and compressed with a food-grade binder. The compressed activated carbon filter element is wrapped inside and outside with a layer of non-woven fabric that has a filtering effect to ensure that the carbon core itself will not drop carbon powder. Both ends of the carbon core are equipped with soft nitrile rubber sealing pads to allow the carbon core to be loaded into the filter cartridge. Has good sealing properties.
B. Bulk activated carbon filter element: Put the required activated carbon particles into a special plastic shell, use welding equipment to weld the end caps to both ends of the shell, and put non-woven fabrics for filtering into 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 include: 4042, 4044, 4046, etc.).
Double-section filter element filter
Previous section: Polypropylene melt-blown filter element precision 5μm
Next section: Granular activated carbon filter with built-in activated carbon 170g
Material:ABS, PP
Length: 250mm Outer diameter: 70mm Flux: 8L/S Total flow: 6-8T
Activated carbon indicators: strength>90; iodine value (mg/g)>950; methylene blue value (mg/g)>120
Resin filter element filter
Resin is a porous, insoluble 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 calcium and magnesium pass through the resin tank, they come into contact with the resin beads and displace sodium ions from their exchange positions. The resin preferentially binds strongly charged cations, with calcium and magnesium ions having stronger charges than sodium ions. The displaced sodium cation then flows down through the resin "bed" and out of the softener, which delivers "soft" water. Eventually, all resin exchange positions are occupied by calcium and magnesium and can no longer function.
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 made of titanium powder that is shaped and sintered at high temperature, so the surface particles are not easy to fall off; the use temperature in the air It can reach 500~600℃; it is suitable for filtration of various corrosive media, such as:, hydroxide, sea water, aqua regia and chloride solutions such as iron, copper, sodium and so on. It has excellent mechanical properties and can be processed by cutting, welding and other machining. It has high pressure resistance and internal pressure destruction strength of up to more than 2MPa. Its filtration accuracy is easy to ensure, and the pore diameter will not deform even if it works under high temperature and high pressure. 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 can be reused after regeneration.
RO reverse osmosis filter
A filter element using RO reverse osmosis membrane. Reverse osmosis technology: The original text of reverse osmosis is REVERSE OSMOSIS. It is a collection of multinational scientists from NASA, with government support, spending billions of dollars and years of research. The principle of reverse osmosis is to exert a pressure greater than the natural osmosis pressure on the raw water side, causing water molecules to reverse osmosis from the side with higher concentration to the side with lower concentration. Since the pore size of the reverse osmosis membrane is far smaller than hundreds or even thousands of times of viruses and bacteria, various viruses, bacteria, heavy metals, solid soluble matter, polluted organic matter, calcium and magnesium ions, etc. cannot pass through the reverse osmosis membrane at all. , thereby achieving the purpose of water softening and purification.
Stainless steel filter
Stainless steel filter element features:
A good filtration performance and uniform surface filtration performance for filtration particle sizes of 2-200um
B Good corrosion resistance, heat resistance, pressure resistance and wear resistance;
C stainless steel filter element has uniform pores and precise filtration accuracy;
D stainless steel filter element has a large flow rate per unit area;
F stainless steel filter element is suitable for low-temperature and high-temperature environments; it can be reused after cleaning and does not need to be replaced.
4. The process of replacing the filter element of the filter element filter
1 Receive the production instruction to replace the filter element and confirm that the system has stopped running;
2 Prepare the appropriate filter element (specification, material, size, O-ring material, model, etc.), disassembly tools, collection bucket, rag, etc.;
3 Thoroughly clean the filter housing, empty around the filter, and leave an operating area. Wear protective equipment;
4 Disconnect the filter that needs to be replaced from the system. Slowly open the exhaust port on the top of the filter to relieve the pressure. Pay attention to safety during the process to prevent materials or liquids from splashing;
5 Empty the material in the filter, use a tool to open the filter cover, take out the filter element, and put the filter element in a plastic bag for scrap;
6 Use clean tools and a rag to clean the inside of the filter before installing a new filter element;
7. Open the plastic bag at the open end of the filter element and check whether the O-ring is intact and in place;
8 Install the material inflow from the outside of the filter element and outflow from the inside of the filter element;
9. Use a suitable wetting agent (such as water) to moisten the O-ring and the filter element seat socket. Hold the end of the filter element close to the O-ring. Vertically insert the filter element socket into the filter element seat socket. After inserting the filter element, remove the filter element. Pack the bag, then install the metal cover and tighten the filter with tools;
10 Close the filter drain port, open the release valve at the top of the shell, slightly open the inlet valve, and let the material enter the shell until the liquid overflows from the release valve at the top of the shell. At this time, close the release valve. Pay attention to check the disassembly parts to see if there are any leaks;
11Slowly open the filter outlet valve until it is fully open. Indicates that the replacement is completed;
12Remove replacement tools and cleaning tools. Clean the surrounding area;
