Four categories of activated carbon for water purification

1. Powdered activated carbon (PAC). Don't be fooled by the name powdered activated carbon. Powdered activated carbon is actually granular activated carbon with a finer particle size. Powdered activated carbon has very small particles and a huge surface area. The adsorption efficiency of powdered carbon is much higher than that of commonly used granular activated carbon. Powder activated carbon used by many large foreign companies.

2. Granular activated carbon (GAC). This is a type of activated carbon commonly used in the water purification industry. wanyang activated carbon factory To be honest, the smaller the activated carbon particles, the better the adsorption effect, but the greater the water resistance (the pressure difference between the inlet and outlet), the easier the carbon will leak out. Therefore, when customers and friends buy activated carbon, Activated carbon with appropriate particle size should be selected.

Among the large-scale water treatment equipment, ten to twenty-four meshes (Φ0.8 to 2.0 mm) are often used. Small-scale household water treatment equipment is due to the short height of the activated carbon column, the very fast flow rate, and the water body is in contact with the activated carbon. The time is relatively short, it is recommended to use 16 to 32 mesh (Φ 0.6 to 1.3 mm).

3. Activated carbon fiber felt, abbreviated in English (ACF), according to the similarities and differences of raw materials, activated carbon fiber felt is divided into two types: one is processed into a cloth shape with [viscose-based fiber filament] as the raw material, and is carbonized. , Activation treatment, high temperature treatment, and made into activated carbon felt, the other is made of [polyacrylonitrile-based fiber] as raw material, processed into a cloth shape, pre-oxidation treatment, carbonization treatment, activation treatment, high temperature treatment and other steps . The average pore size of the former is 17 to 26A, and the average pore size of the latter is 10 to 20A.

Activated carbon fiber felt is usually one to five millimeters thick. It has a higher number of micropores than granular activated carbon, a larger specific surface area (1,000 to 1,600 square meters per gram), and a larger adsorption capacity (two high Up to six times), the adsorption speed is also faster, and it has a very good regeneration capacity, the desorption speed is fast, and it can be reused. The disadvantage is that it is expensive and it is easier to breed bacteria.

4. Sintered activated carbon filter, abbreviated in English (CTO), is also called carbon rod filter and compressed activated carbon filter. It is made of two types of granular activated carbon added with a binder (such as PE resin), sintered at high temperature and then extruded into the desired shape. The outer layer of the carbon core is often covered with white [polypropylene (PP)] non-woven outer packaging . The sintered activated carbon filter element has the two functions of filtration (average pore size is 3-20μm) and adsorption, but its filtration efficiency is lower than that of PP melt-blown filter element, and the adsorption efficiency is also lower than that of granular activated carbon filter element.yrdcarbon.com