The feed air is freed from dust and other mechanical impurities by air filter, and then compressed by means of air compressor, the process air pass through the after-cooler and enter into the purifier to remove moisture, carbon dioxide and hydrocarbon etc. The purification system is consist of two vertical vessels, when one is running, the other one is regenerating by WN2 coming from cold box after passing through the electrical heater.
The purified air enters into the main heat exchanger, and then it is divided into two portion, one part of purified air is liquefied through the throttling valve and then it is LED to the bottom of the column. In the rectification column, the rising gas is touched with counter-flowing liquid completely, after heat and mass exchange, the content of nitrogen in the rising gas is increasing, and in the top of column it is turned into pure nitrogen. The pure nitrogen gas is LED into main condenser-evaporator in the top of the lower column, while the gaseous nitrogen is condensing, the liquid oxygen is evaporated. The liquid nitrogen is drawn out as the counter-flowing liquid of the upper and lower column. The other part of the purified air is LED into upper column to rectification after expansion.
The liquid nitrogen produced in the lower column enters into the upper column to take part in the rectification after passing through sub-cooling, the waste nitrogen passed through the main heat exchanger is drawn out of the column as regeneration gas for purifier.
The eligible oxygen coming from the rectification column is LED into oxygen compressor, after cooling and removal of water, the product oxygen is filled into oxygen cylinder by means of charging manifold.
Model |
KDON-600/1200 |
KDONAr-1000/1000/25 |
KDON-500/1000 |
Oxygen Purity |
99.60% |
99.60% |
99.60% |
Oxygen output |
600Nm3/h |
1000Nm3/h |
500Nm3/h |
Nitrogen Output |
1200Nm4/h |
1000Nm3/h |
1000Nm4/h |
Nitrogen Purityt |
99.99% |
99.99% |
99.99% |
Argon Output |
|
25Nm3/h |
|
Argon Purity |
|
99.99% |
|
Operation pressure |
0.8Mpa |
0.8Mpa |
0.7Mpa |
Start time |
36h |
36h |
24h |
Electric consumption |
0.78Kwh/Nm3 O2 |
0.592 KWH/Nm3O2 |
1.4KWh/Nm3o2 |
Power supply |
380V/220V/50Hz |
380V/220V/50Hz |
380V/220V/50Hz |