In order to ensure the safety of oxygen production, there are certain restrictions on the combustible impurities of hydrocarbons in the air at the suction port of the air compressor. According to GBl6912-1997 "Technical Safety Regulations for Oxygen and Related Gases", the impurity content should be lower than the allowable limit content specified in the table below.
The allowable limit content of hydrocarbons and other impurities in the air at the suction port
|
Names of impurities such as hydrocarbons |
Permissible limit content (carbon content)/mg · m-3 |
|
|
There is a liquid air adsorption purification device inside the air separation tower |
There is a molecular sieve adsorption purification device in front of the air separation tower |
|
|
Acetylene |
0.5 |
5 |
|
Acetylene derivatives |
0.01 |
0.5 |
|
C5、C6saturated and unsaturated hydrocarbon impurities totaling |
0.05 |
2 |
|
C3、C4saturated and unsaturated hydrocarbon impurities totaling |
0.3 |
2 |
|
C2saturated and unsaturated hydrocarbon impurities total |
10 |
10 |
|
Carbon sulfide(CS2) Nitrogen oxide(NO) Ozone(O3) |
0.03 1.25 0.215 |
|
