Cryogenic liquid oxygen/nitrogen plants in as a product mix mode are as well manufactured & supplied where one can get 30% upto 100% liquid oxygen/nitrogen out put. This is further stored in a liquid oxygen tank.


Manufacturing Process :

1. Compression Of Atmospheric Air By Air Compressor
In order to consume the free saturated air, an efficient dry-type suction filter is used to suck it from atmosphere into the first stage of the horizontal balanced opposed, lubricated reciprocating air compressor. This compressed air is then chilled to 12°C in a chilling unit at a temperature of 12 degree centigrade to a moisture separator. Prior to its entry into the Molecular Sieve Battery, the condensed moisture is first removed & in order to make air oil free, it is passed through an OIL ABSORBER before this is sent to MOLECULAR SIEVE BATTERY.

2. Purification of Air By Process Skid
Consisting of twin towers, the Molecular Silver Battery operates the packed Molecular Sieves. When chilled air passes through this particular tower, it helps in removing the moisture and Carbon dioxide present in the air. When one of the towers gets regenerated by passing waste Nitrogen gas at 200°C through a reactivation heater, then the other tower is under production which gets exhausted and regenerated by similar process after a gap of 8 to 10 hrs before use. The vicious cycle continues. Before entering the AIR SEPARATION COLUMN, the dust particles gets filtered in the DUST FILTER.

3. Cooling of Air By Expansion Engine (Expander)
The air should be cooled in the air separation unit to temperatures sub-zero (cryogenic) before the liquefication process. After this procedure, its main portion skid enters the expansion engine through the heat exchanger no. I where the air temperature drops to around -165°C by the Expander, which is sophisticatedly designed with Teflon piston rings assorted with hydraulic mechanism with leak proof ball valves.

4. Separation If Liquid Air Into Oxygen And Nitrogen By Air Separation Column
The cold gained from outgoing waste nitrogen & oxygen is used for cooling the chilled, oil free and moisture free air at (-80)°C . This enters into multi-pass HEAT EXCHANGER NO.I while a part of it even enters a multi-pass HEAT EXCHANGER NO. II or LIQUIFIER constructed of special Alloy tubes. The air cools to (-170)°C & prior to its entry into the bottom column & is further cooled, liquefied due to joule Thompson Effect before making its way through an expansion valve. Known as the rich liquid, it later enters into feed tray of top column in the bottom column. While in the top column, POOR LIQUID, a form of liquid nitrogen makes its entry as a reflux. It takes away the latest heat of condensing Oxygen and gets vaporised & on the other hand the liquid Oxygen flows down the trays of the top column into the Condenser passes through a Sub-Cooler to a LO Pump.

5. Compression and withdrawal of liquid and gaseous oxygen for storing in storage tank and cylinder filling

Technical Specification

Model BO-30 to BO-100
Model		BO-50L	BO-100L	BO-200L	BO-300L	BO-500L
Capacity	Oxygen	50Ltrs/hr	100Ltrs/hr	200Ltrs/hr	300Ltrs/hr	500Ltrs/hr
	Nitrogen	200m3/hr	300m3/hr	800m3/hr	1200m3/hr	2000m3.hr
Purity	Oxygen	99.60%	99.60%	99.60%	99.60%	99.60%
	Nitrogen	96%-99.9%	96%-99.9%	96%-99.9%	96%-99.9%	96%-99.9%
Power Connected		125KW	250KW	400KW	500KW	950KW
Power consumed		90KW	150KW	280KW	400KW	700KW
Power Supply		415 Volts	415 Volts	415 Volts	415 Volts	415 Volts
Working Pressure		100kg/cm2	95kg/cm2	90kg/cm2	90kg/cm2	90kg/cm2
Air Capacity		300m3/hr	600m3/hr	1200m3/hr	1800m3/hr	3000m3/hr
Areas required		8Mx12M	14Mx15M	14Mx15M	14Mx15M	14Mx15M
Assembly Height		7.5Meters	9.5Meters	9.5Meters	9.5Meters	10Meters
Weight		19Tons	30Tons	50Tons	60Tons	80Tons

Note :
To store the output of liquid oxygen, liquid oxygen tank is required & upto 99.999% (PPM GRADE) purity, liquid nitrogen are easily available as a by product. The plant has all the possible product variants where one can easily take 100% Liquid oxygen out put or 50% Liquid oxygen output directly into cylinders or 50% Liquid oxygen and 50% Liquid nitrogens, thus, making it all the more versatile in nature.