Information about Sintered Activated Carbon Filters That All You Want to Know

In the water treatment industry, words like sintered activated carbon cartridge, compressed activated carbon filter, extruded activated carbon cartridge, CTO carbon cartridge and honeycomb carbon filter are often mentioned or used, but many people do not really understand them.HUATAN FILTERwill introduce you in detail about the difference between these products today.

NSF CTO Activated Carbon Block Carbon Charcoal Water Filter CTO Filter Cartridge
NSF CTO Activated Carbon Block Carbon Charcoal Water Filter CTO Filter Cartridge

Sintered activated carbon filter, compressed activated carbon filter, extruded activated carbon filter are named after their production process characteristics, and CTO carbon filter and net carbon filter are named after the appearance of their final shape. Although their appearance is the same, their internal quality and production technology are greatly different.

Sintered activated carbon block is made by mixing activated carbon powder material and polymer hot-melt pore material, and then pouring it into a special mold and sintering at a high temperature of 200-300 ° C. Because this polymer bonding material can form open micropores in the sintering process, it maintains the characteristics of large specific surface area of activated carbon powder, excellent pore formation, better filtering effect, and more fully with liquid contact after mixing with activated carbon;Due to its complex processing technology, the production capacity of sintered activated carbon filter is also limited.

Compressed activated carbon filter is made by mixing activated carbon powder material with inorganic liquid binder, filling it into a special mold, compressing and molding with a press at high pressure, and drying after exiting the mold;This process has high content of activated carbon and good filtering effect. However, because it is only adhered by using inorganic materials and then high-pressure molding without being sintered at high temperature during production.This makes it difficult to control the pore diameter of the compressed activated carbon filter and the filter cartridge pressure drop becomes large, which affects the performance of the filter cartridge.

Extruded activated carbon filter is produced by mixing activated carbon and common hot-melt resin and putting it into a screw extruder for heating and extrusion molding. In this production process, the appearance of the activated carbon is melted and wrapped by the hot-melt resin after high temperature. The hot-melt resin blocks the pores of the activated carbon, causing the entire filter cartridge to lose its adsorption effect. The production cost of extruded activated carbon block produced by this process is low, but its output is very high. This filter cartridge is just a decoration during use without any filtering or adsorption effect.

CTO carbon filter is the abbreviation of chloride, taste, and odor. Net carbon block filter extruded activated carbon filter , sintered activated carbon filter,and compressed activated carbon filter, in a broad sense, they are rod-shaped forms of activated carbon block, which can be collectively referred to as shaped activated carbon cartridge.

At present, the use of shapedactivated carbon filter cartridges in the water treatment industry is becoming more and more important.

The main reasons are: Firstly, the formed activated carbon filter integrates the functions of adsorption and interception. It not only has the adsorption of activated carbon, but also has dense voids, which can effectively intercept large particles of impurities and effectively reduce the physical pollution of water quality;

Secondly, the pore size of the shaped activated carbon filter cartridge can be adjusted arbitrarily, and the smallest pore size can reach 0.2 micrometers, which is better than the so-called large-flux hollow ultrafiltration membranes on the market.

Thirdly,The black water that flows out of the shaped activated carbon during water treatment is less than the granular activated carbon. After the black powder in the carbon block is washed out for the first time, the black water will not appear in the future, and it will not be caused by the flushing of the water like the granular activated carbon. It will not cause decontamination and secondary pollution when washed by water stream like granular activated carbon.

Finally, the activated carbon powder below 80 mesh has a large specific surface area after processing, so that the performance of activated carbon can be fully exerted.

The sintered activated carbon block is a shaped activated carbon with the above functions. Because many people confuse sintered activated carbon block with extruded activated carbon block, many active carbon block manufacturers have given their sintered activated carbon block products a unique name in order to avoid confusion. For example, HUATAN FILTER called sintered activated carbon as diamond carbon block. The 3M company called this activated carbon filter a black magic activated carbon filter.

Due to its special molding process, sintered activated carbon block technology can be developed into a compound filter cartridge with activated carbon as the main body mixed with a variety of ultra-fine filter powders.

Because the shape of the sintered activated carbon filter is very similar to the shape of the low-end extruded activated carbon filter, we share 2 main methods of identification for you.The first is the hydrophilicity test. The sintered activated carbon block has good hydrophilicity, so you can try to drop a drop of water on the filter cartridge, and the water droplets can immediately penetrate into the carbon filter.The second method is that the water flowing out of the sintered activated carbon filter cartridge when it is first passed is hot, and this phenomenon does not occur when the activated carbon water filter is squeezed.

Sintered activated carbon filter has a relatively low production capacity due to the special sintering process, and it requires a large investment in mold costs and high-quality materials. Its product cost is higher than ordinary carbon filter cartridges, but it has superior product performance. Experienced companies in the water treatment industry understand the benefits of this high-end product. With the constant standardization of the water treatment industry, the inferior carbon filter materials that have been in the market for price competition must be abandoned, and the sintered activated carbon filter cartridge will become an essential accessory for the water purification industry.

8 Tips for The Use of Sintered Activated Carbon Blocks

The sintered activated carbon filter is a filterwhich is prepared by mixing activated carbon powder material and polymer hot-melting pore-forming material, pouring into a special mold, and sintering at a high temperature of 200-300 ° C. It integrates adsorption, filtration, interception and catalysis into one body, which can effectively remove organic matter, residual chlorine and other radioactive substances in water, and has the effects of decolorization and odor removal. However, there are many points that need special attention when using sintered activated carbon. Today we will share 8 tips for using sintered activated carbon.

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1. The sintered activated carbon block has a large number of micropores and super strong adsorption capacity, and its adsorption performance is second only to the high-precision filter cartridge. The pore diameter of the sintered activated carbon block will gradually become smaller during the process of intercepting and adsorbing impurities, and the pressure drop of the filter cartridge becomes larger, and the flow rate becomes smaller.

2. The filtering effect of the sintered activated carbon block is proportional to the contact time of the filtered material with the activated carbon cartridge. Therefore, the wall thickness of the sintered activated carbon filter determines the effect of filtering the pollutants.

3. The pore size of the sintered activated carbon block filter cartridge should not be too large. Generally, the best pore size is 1-2 microns. Otherwise it will affect the adsorption and filtration effect of activated carbon on contaminant.

4. All activated carbon blocks should be careful to avoid the adhesion of a large amount of large particles (SS solid suspension) to the surface during use, as this will cause anaerobic biological growth, thereby reducing the adsorption effect of the activated carbon filter and producing other odors. Therefore, the precision of pp cotton filter (the pre-filter cartridge of the sintered activated carbon filter) must reach the standard of 1 micron, or the precision of the non-woven fabric wrapped with sintered activated carbon should reach about 1 micron.

5. When the sintered activated carbon filter is used after being placed in the hollow ultrafiltration wet film, we need to pay attention to thoroughly clean the protective liquid of the ultrafiltration membrane when it is used for the first time, and then connect the sintered activated carbon filter.Otherwise, the strong adsorption of the sintered activated carbon will instantaneously adsorb the alcohol and the silicone oil in the protective liquid, causing the filter catridge to be ineffective or even mold. (Other activated carbon filter cartridges should also be noted).

6. Granular activated carbon, alkaline ball, maifanite ball and negative potential ball (hereinafter referred to as “particle state filter element”) are easy to produce powdery substances. If these filter elements are placed in front of sintered activated carbon blcok, the generated dust will easily block the sintering activated carbon filter.Therefore, when using the filter, we recommend you to wash the granular material filter cartridge before use, until there is no black water or floating out and then connected to the sintered activated carbon filter cartridge.

7. If the particle filter cartridge and the sintered activated carbon filter cartridge are separated by an ultrafiltration membrane filter cartridge, it is necessary to ensure that the ultrafiltration membrane filter cartridge is not damaged, and the ultrafiltration membrane should be backwashed frequently to avoid high temperature, Otherwise, the impurities intercepted by the ultrafiltration membrane will be decomposed by the microbial bacteria and produce a rancid smell. These odors are immediately adsorbed by the sintered activated carbon block. After a while, our drinking water will have an odor (it can be washed with a large amount of water).

8. Sintered activated carbon filter has super strong adsorption effect. If it is placed behind the alkaline function filter cartridge, the alkalinity will be weakened.

HUATAN is a leading green-tech activated carbon block manufacturer in China. We specialize in the customization and production of activated carbon blocks, carbon filter cartridges and compound carbon filters. We can manufacture activated carbon products with different specifications and functions according to the specific needs of customers. If you are interested in our company or products, please feel free to contact us at