Introduction and replacement of carbon molecular sieve

As a new type of adsorbent developed in the 1970s, carbon molecular sieve (CMS for short) has become the preferred nitrogen-enriched adsorbent for pressure swing adsorption (PSA) air separation in the engineering industry. Its excellent non-polar carbon material properties enable nitrogen-making carbon molecular sieves to effectively separate nitrogen from the air at room temperature and low pressure. Compared with the traditional deep cold and high pressure nitrogen production process, it has many advantages such as low investment cost, fast nitrogen production speed and low nitrogen cost.

Carbon molecular sieve CMS

The main component of carbon molecular sieve is elemental carbon, and its appearance is a black columnar solid. It contains a large number of micropores with a diameter of 4 angstroms. These micropores have a strong instantaneous affinity for oxygen molecules and can efficiently separate oxygen and nitrogen in the air.

When the molecular sieve adsorbs impurity gases, the macropores and mesopores mainly play the role of channels, transporting the adsorbed molecules to the micropores and submicropores, and these micropores and submicropores are the volumes that really play the adsorption role. Carbon molecular sieve has large nitrogen production capacity, high nitrogen recovery rate and long service life, and is suitable for various types of pressure swing adsorption nitrogen generators.

Replacement of carbon molecular sieve

The working environment pressure in the nitrogen generator equipment is constantly changing. The carbon molecular sieve is subjected to pressure erosion for a long time, and its adsorption performance will gradually decay. When the nitrogen concentration cannot meet the requirements, the carbon molecular sieve in the nitrogen generator needs to be replaced. The steps for replacing the carbon molecular sieve include:

1. Check whether the various filtering equipment in the air intake pipe of the nitrogen generator needs to be replaced together.

2. Shut down the equipment, release the pressure in the nitrogen system, and cut off the power supply.

3. Remove the pipe and top cover on the top of the tank body, and check whether the palm mat or compression structure in the tank body is normal.

4. Remove the discharge port at the bottom of the tank body, completely release the carbon molecular sieve in the tank body, and clean it up.

5. After placing the palm mat at the bottom of the tank body, first fill in a certain height of activated alumina, and then fill in the carbon molecular sieve to ensure that the filling is compacted.

6. Finally, press the top cover hard according to the original mark to check the overall sealing of the equipment.

When replacing the carbon molecular sieve, you also need to pay attention to different clamping methods, such as cylinder clamping, spring clamping, coconut pad flange clamping, etc. Each clamping method has different requirements for the replacement of the carbon molecular sieve.