Production method of coconut shell activated carbon
1.Raw material screening of coconut shell activated carbon
The quality of activated carbon depends on the quality of raw materials. There are two main sources of coconut shell activated carbon on the market, one is Hainan coconut shell and the other is Indonesian coconut shell. The shell of Hainan coconut is thin and the density is not very high, while the shell of Indonesian coconut is very thick and the density is high. In contrast, the quality of the activated carbon processed by Indonesian coconut shell will be better.
Put the sifted coconut shell into the carbonization equipment, burn it to a certain degree at high temperature, then close the charcoal kiln to let the air in, and then continue to heat and dry distillation to make the moisture and wood tar in the coconut shell be simmered, which forms the coconut shell char .
Put the carbonized coconut shell char into the activation furnace, and make oxygen-containing gas such as water vapor, flue gas (main component is CO2) as an activator, and contact with the carbon at high temperature to produce redox reaction to activate. The main operating conditions of the activation process include activation temperature, activation time, flow rate and temperature of the activator, feed rate, and oxygen content in the activation furnace.
4.Particle size screening of coconut shell activated carbon
The activated coconut shell charcoal becomes coconut shell activated carbon at this time, and then it can be sieved according to the customer’s particle size requirements. The commonly used coconut shell activated carbon particle size is 6-12 mesh, 8-16 mesh, 10-24 mesh , 20-40 mesh, 200 mesh, 325 mesh, etc.
The packaging specification of coconut shell activated carbon is generally 25kg/bag or ton bag. The packaging bag uses double-layer woven bag, which is strong and has a moisture-proof function.
Coconut shell activated carbon production process relative humidity
The relative humidity of the gas during production should be 70-100%. When the humidity is insufficient, it can supplement water vapor, but it cannot bring liquid water into the activated carbon bed.
The quality of the product can be reflected in the production process. The rigor and steps of the coconut shell activated carbon in the production process can see why the price is higher than other activated carbon.
Coconut shell activated carbon production process temperature
The normal use temperature can be 27-82℃, and the best use temperature is 32-52℃. The desulfurization tower should be kept warm when used in cold areas.