Delivery Time:120 Days
Certification:ISO 9001:2000

Petrochemical Air Separation Unit , Lower Operation Pressure Liquid Oxygen Plant

Quick Details:

Condition: new

Place of origin: China(mainland)

Brand name: UIG

Model number: KDO,KDN,KDON,KLN SERIES

Production capacity:50-2000 m3/hour

Power :60-1000 KW

Voltage:380v,400V,440V

Certification: ISO 9001:2000

Warranty:1 year

Life:20 years with proper maintenance

After-sales service provided: Engineers available to service plants overseas

Usage: Industrial and medical (oxygen, liquid oxygen, nitrogen, liquid nitrogen)

UIG Air separation plants are designed for a vast range of capacities and products summarized below: FOR OXYGEN 99.7 % AND NITROGEN 99.999%

Specifications:

LO2   flow	100  L/h	200  L/h	300  L/h	500  L/h	800  L/h
LO2   purity	99.6%	99.6%	99.6%	99.6%	99.6%
LOX   pressure	0.08 MPA	0.08 MPA	0.08 MPA	0.08 MPA	0.08 MPA
LN2   flow	(100 L/h )	(200  L/h )	(300  L/h )	(500  L/h )	(800  L/h )
LN2   purity	99.999%	99.999%	99.999%	99.999%	99.999%
LN2   pressure	0.08 MPA	0.08 MPA	0.08 MPA	0.08 MPA	0.08 MPA
Start-up  time	5-8 Hours	5-8  Hours	5-8 Hours	5-8  Hours	5-8  Hours
Operating period	≥2 Years	≥2  Years	≥2  Years	≥2  Years	≥2  Years

Process:

Air→ Air compressor → Pre-cooler → Purifier →Rectification column and Turbo-expander →liquid oxygen tank or liquid nitrogen tank

Description:

STEP 1 - Air Compression by rotary air compressors.

In the first stage air is compressed at a low pressure of 5-7 bar (Gas plants) to 10 Bar (liquid plants). Air can be compressed at such low pressure by trouble free rotary compressor (Screw / Centrifugal Type advanced technology is employed in lieu of old bulky piston reciprocating compressor).

STEP 2 - Air Pre-Cooling

The second stage of the process uses a low pressure refrigerant for pre-cooling the processed air to temperature around 12 deg c before it enters the purifier.

STEP 3 - Purification of Air by Purifier

The air enters a purifier consisting of twin Molecular Sieve driers, working alternatively. The Molecular Sieves remove the Carbon dioxide & moisture from the process air before the air enters Air Separation Unit.

STEP 4 - Separation of Liquid Air into Oxygen and Nitrogen in Air Separation Column

Oil free, moisture free and Carbon Dioxide free air enters into low pressure plate fin type Heat exchanger where the air is cooled below sub zero temperatures by air expansion process in the turbo expander. Due to the excellent thermal efficiency we can achieve a temperature difference delta t as low as 2 deg c at the warm end of these exchangers.

The air has to be cooled to sub zero temperatures for liquefaction & the cryogenic refrigeration & the cooling is provided by highly efficient turbo expander, which cools the air to temperature almost below -165 to-170 deg C. Air gets liquefied when it enters the air separation column & gets separated into oxygen & nitrogen by the process of rectification.

Oxygen is available in gas or liquid form (as per requirement) at the outlet of the ASU at a purity of 99.6%. Nitrogen is also