Sintered activated carbon filter element

The carbon filter element is made of activated carbon particles added to the binder and heated and sintered. The innermost layer of the filter element is a polypropylene skeleton to enhance the pressure resistance of the filter element. The bone frame is covered with two layers of polypropylene microfiber felt, which can intercept liquid passing through the carbon core and bring out particles larger than 10 microns. The outer layer of the carbon core is covered with two layers of polypropylene superfine fiber felt, which can intercept particles larger than 10-20 microns in the liquid, so that the filter element has the dual functions of filtration and purification. The outermost layer is a white plastic mesh cover, which gives the filter element a complete and clean appearance. Both ends of the filter element are equipped with soft nitrile rubber end caps, so that the filter element has a good sealing performance after being installed in the filter cartridge. The finished activated carbon filter element is tightly encapsulated with plastic film to prevent the water treatment filter element from being polluted and keep the filter element in a fresh state. The activated carbon filter element has a good adsorption effect and can effectively remove residual chlorine, peculiar smell, color and organic matter in the water.


In the water treatment industry, words such as sintered activated carbon, compressed activated carbon, extruded activated carbon, CTO, and net carbon are often mentioned or used, but many people do not really understand them.

Sintered activated carbon, compressed activated carbon, and extruded activated carbon are named after the characteristics of their production process, and CTO and netted carbon are words called their final appearance.

Although they have the same appearance, their internal quality and production process are quite different.

Sintered activated carbon: It is made by mixing activated carbon powder material and polymer hot-melt pore-forming material, poured into a special mold, and sintered at a high temperature of 200-300℃; because this polymer bonding material can be formed in the sintering process Open micropores, after being mixed with activated carbon, the activated carbon powder maintains the characteristics of large specific surface area, excellent pore formation, better filtering effect, and fuller contact with liquid; due to its complex processing technology, the production capacity is limited.

Compressed activated carbon: After the activated carbon powder material is mixed with an inorganic liquid binder, it is poured into a special mold, compressed and molded by a press at high pressure, and dried after being ejected; this process has high activated carbon content and good filtering effect, but inorganic bonding is used The material is often subjected to high-pressure molding, which makes it difficult to control the aperture of the filter element, and the pressure drop of the filter element is too large, which affects the use.



Extruded activated carbon: activated carbon is mixed with ordinary hot-melt resin and then put into a screw extruder for heating and extrusion. In this production process, the surface of the activated carbon is melted and wrapped by the hot-melt resin at high temperature, which blocks the micropores of the activated carbon, loses the adsorption effect, and has low production cost and high output. In use, it is actually a decoration and has no effect.

CTO (abbreviation of chlorine, taste, odor, namely: chlorine, taste and odor), mesh charcoal, extruded activated carbon, sintered activated carbon, compressed activated carbon, broadly speaking, they are the form of activated carbon rods, which can be collectively referred to as molded activated carbon.

At present, the use of molded activated carbon filter elements in the water treatment industry has attracted more and more attention. The main reasons are: 1. The molded activated carbon integrates adsorption and interception. Not only does it have the adsorptivity of activated carbon, it also has dense voids that can effectively intercept Large particles of impurities can effectively reduce the physical pollution of water quality; 2. The pore size can be adjusted arbitrarily, with a minimum of 0.2 microns, which is better than the so-called large flux hollow ultrafiltration membrane on the market; 3. The outflow of black water is less than that of granular activated carbon. After the black powder in the carbon rod is washed out for the first time, there will be no black water in the future, let alone desorption after adsorption due to the washing of water flow like granular activated carbon, resulting in secondary pollution; 4. Activated carbon below 80 mesh Powder processing, large specific surface area, so that the performance of activated carbon can be fully utilized.

Sintered activated carbon is a shaped activated carbon with the above-mentioned functions. Since everyone confuses sintered activated carbon and extruded activated carbon, many manufacturers call sintered activated carbon (Guangzhou Kangrui Environmental Protection) to avoid confusion, and some call it Black Magic (BLACK MAGIC) activated carbon rod (3M company).

Sintered activated carbon technology, due to its special molding process, can develop a composite filter element that uses activated carbon as the main body and a variety of ultra-fine filter powders. Its varieties include special filter elements for decolorization, deodorization, organic matter removal, and water softening; special metal removal filter elements for removing heavy metals such as aluminum, mercury, manganese, arsenic, etc. in the water; special fluorine removal filter elements for high-fluorine water areas; for well water, Special mineralized filter element with added trace elements and minerals for soft water; antibacterial filter element with antibacterial material added to inhibit the growth of bacteria.

The sintered activated carbon filter element has a tortuous cage-like micro-pore channel, which has an obvious effect on filtering impurities. Due to the accumulation of impurities, the filter element is easy to block and the water flow will be reduced. Therefore, foreign water treatment companies (such as: 3M) have proposed 'The clogged filter element is a good filter element'; in order to prolong the use time of the filter element and reduce clogging, there should be a good pre-filter before sintering the activated carbon filter element, such as a 1um pp cotton filter element.

Because the shape of the sintered activated carbon filter element is similar to that of the low-end extrusion, there are two main methods for distinguishing: 1. Hydrophilicity test. The sintered activated carbon has good hydrophilicity. Drop a drop of water and immediately penetrate into the filter element, while squeezing the activated carbon droplets. It will always float on the filter element; 2. The water flowing out of the sintered activated carbon filter element is hot when the water is just passed through, and this will not happen when the activated carbon filter element is extruded.

Sintered activated carbon filter element experiment:

1. Cola (ink) experiment: The experimental filter element is erected on the white paper prepared in advance, and the coke is poured directly into the inner hole of the experimental filter element. After a while, the outer wall of the filter element evenly sees out clear water drops, and the sweetness of the cola is obviously weakened. Ordinary filter elements do not have this advantage.

2. Bleaching water (bleaching liquid) experiment: take a large glass (500ml), fill it with water, add 2-4 drops of bleaching water (bleaching liquid), stir, and pour the mixture into half a cup until it is disposable Put the experimental filter element into another large glass cup, and then pour the mixture in the large glass cup into the middle inner hole of the experimental filter element. Later, the outer wall of the filter element evenly sees out clear water drops, and the large cup with the experimental filter element seeps After enough liquid has been discharged (1 cm from the bottom of the cup), take out the experimental filter element. At this time, take out the residual chlorine test solution and drop 2-3 drops into the exuded water and the originally reserved mixture respectively, and the exudation can be found The color in the liquid remains clear, and the color in the mixed liquid turns yellow immediately. It shows that the sintered activated carbon filter element has a super strong effect of removing residual chlorine and its derivatives.

Due to the special sintering process, low production capacity, large investment in molds, strict material selection (the particle size of the material must be less than 80 mesh), the product cost of sintered activated carbon is higher than that of ordinary filter elements, but its superior product performance, unique vision of elites in the industry This high-end product has long been used. With the continuous regulation of the industry, inferior filter materials that are rampant in the market for price competition must be abandoned, and sintered activated carbon filter elements will become an essential accessory in the water purification industry. Activated carbon filter OEM custom manufacturer