Liquid Oxygen Plant Nm3/h KDON-500Y/500Y Shielding gas Chilling and
Cooling Nitrogen Liquid
Standard Product for Liquid Oxygen Plant KDON-50~500 Series
Typical Product: KDON-500Y/500YLiquid Oxygen Plant
Output, purity and pressure
This is a full low pressure process in which the air is purified by
MS with low temperature chiller and boosting turbine expansion. One
set of low temperature chiller and two expanders are added to
supply cold capacity to liquid product.
The air after purified is divided into 3 parts, the air cooled by
chiller with temperature of -30℃ flows into main heat exchanger
again, and it is divided into 2 parts: one part flows into expander
1 to be expanded, and then flows into plate-fin to be rewarmed, and
then flows to the inlet of air compressor; the other part is
continuously cooled and throttled in the plate-fin, and then flows
to lower column.
With preliminary rectifying in lower column, liquid air and LIN are
obtained from bottom and top of lower column separately. Lair,
waste LIN and LIN from lower column is subcooled in Lair/LIN
subcooler E2, and then fed to upper column to be rectified further.
Then LOX with purity of 99.6% is obtained at bottom of upper
column. The required output of LOX is withdrawn out of cold box to
LOX storage system of client.
LIN with purity of 2ppmO2 withdrawn from bottom of lower column is
subcooled in Lair/LIN subcooler, then required output of high
purity LIN is withdrawn out of cold box to LIN storage system of
- Shielding gas
- Electronic Gas
- Chilling and Cooling
- Metal production
- Welding and metal processing
- Mature project engineering supervision
- Leading technical level, perfect technical development group .
- Low Maintenance Cost
- Low power consumption
- No loss, high returns
- All gas and liquid plants are optimized to meet customer-specific