In the purchase of pure water, the sales staff will introduce consumers to this water purifier has a five-stage filtration system, can be purified with other water purifiers to produce water more pure. Five-stage filtration system: pp cotton, granular activated carbon cartridge, block activated carbon cartridge, reverse osmosis filtration, after the activated carbon cartridge. Today, we will talk about the role of post activated carbon cartridge water purification equipment.
Post-activated carbon cartridge is the last process in the cartridge filtration, the main role is to purify water quality, improve the taste of water. Generally after the use of activated carbon coconut shell activated carbon, this coconut shell activated carbon is mainly above the coconut shell as raw materials, after a series of precision processing and production, we can see the appearance of black, granular, this activated carbon has a strong adsorption capacity, long service life, wear-resistant and so on. Pure water equipment has a post-completion activated carbon cartridge system to purify water in depth, the raw water through the layers of filtration in the water purifier, go to the post-completion activated carbon cartridge, can be more thorough adsorption of water purification of foreign colors, odors, adjust the taste of pure water, while inhibiting the regeneration of bacteria in the pure water to ensure that pure sweet and tasty. In the use of water purifiers containing cartridges, we should pay attention to the usual maintenance of the cartridge, replacement, the market price of the rear activated carbon carbon is about 115 yuan, the recommended life expectancy is 18 months, so we must pay attention to the maintenance and cleaning, in the process of cleaning, we have to use the correct cleaning method and cleaning agent for cleaning, otherwise, it will inevitably cause adverse effects on the pure water equipment itself. However, the timely replacement of filter cartridges in order to drink clean pure water.
When we watch or buy water purifier, always hear or see "activated carbon", whether it is ultrafiltration water purifier or reverse osmosis water purifier, or nanofiltration water purifier, the key technology in the machine has changed, but the same is always activated carbon. Visible, activated carbon in the water purifier plays a very important role.
Activated carbon is a very good adsorption material, it is the use of charcoal, bamboo charcoal, a variety of fruit shells and high-quality coal as raw materials, through physical and chemical methods of raw materials for crushing, sieving, catalyst activation, rinsing, drying and screening and a series of processes and manufacturing, which has a physical adsorption and chemical adsorption of the dual characteristics of the selective adsorption of a variety of substances in the tap water, in order to achieve decolorization, Deodorization and removal of chemical pollution and volatile organic compounds and other purposes. Below we will analyze the common types of activated carbon in the water purifier:
1. Powdered Activated Carbon (PAC)
Powdered Activated Carbon (PAC) is actually granular activated carbon with finer particle size. Due to the small particle size and large specific surface area, its adsorption effect is better than the commonly used granular activated carbon.
2. Granular Activated Carbon (GAC)
This is the commonly used activated carbon in water purifiers. The smaller the particles, the better the adsorption capacity, but the greater the resistance of water (differential pressure between import and export), the easier the leakage of carbon, so the water purifier manufacturer should choose the particles with appropriate particle size. In large-scale water treatment equipment, often choose 10-24 mesh (diameter 0.8-2.0mm), small household water purifiers due to the short height of the carbon column, fast flow rate, water and activated carbon contact time is short, it is recommended to choose 16-32 mesh (diameter 0.6-1.3mm).
3. Activated carbon fiber felt (ACF)
According to different raw materials, there are two kinds: one is based on viscose fiber filament as raw material, processed into cloth, carbonization, activation, high temperature treatment and become; the other is based on polypropylene stone-based fibers as raw material, processed into felt, pre-oxidation, carbonization, activation, high temperature treatment and become. The average pore size of the former is 17-26A, the latter is 10-20A.
Activated carbon fibers are often made 1-5mm thick felt, which has more micropores than granular activated carbon, larger specific surface area (1000-1600m2/g), larger adsorption capacity (2-6 times higher), faster adsorption, and good regeneration performance, fast desorption, can be Reuse. The disadvantage is that it is more expensive and easy to propagate bacteria.
4. Sintered activated carbon cartridge (CTO)
Sintered activated carbon cartridge (CTO) is also known as carbon rod cartridge and compressed activated carbon cartridge. It is made of granular activated carbon with a binder (such as PE resin) sintered and extruded at high temperature, and the outer layer of the cartridge is often wrapped with a white polypropylene (PP) non-woven fabric. Sintered activated carbon cartridge both adsorption and filtration (average pore size 3-20um) two functions, but its filtration function is lower than the PP meltblown cartridge, adsorption function is lower than the granular activated carbon cartridge.