SANGHI ORGANIZATION
Leading Manufacturers of Oxygen Plants, Nitrogen Plants and Other Industrial Gas Plants
" Growth with spirit of conservatism, consistency and conscience."
OXYGEN/NITROGEN PLANT
 
   
Typical layout of Oxygen Plant
3 Air Separation Units of 20 tpd each
 installed in a steel manufacturing unit
            
   
Introduction

The SANGHI-ORG Oxygen Plant, is safe and economical to operate. It comes with an efficient expansion engine, which lowers the operating pressures remarkably to as low as 32-35 kg/cm2 and also cuts down power consumption.

A Molecular sieve Battery drier unit for separation of moisture and carbon dioxide is another money-saving device in the SANGHI-ORG plant. It removes acetylene and other hydro-carbons from the process air, thus eliminating the need for separate acetylene absorbers, and moreover it eliminates recurring caustic soda costs.

The SANGHI-ORG Oxygen Plant is capable of simultaneously producing high purity Oxygen Gas and Nitrogen Gas. It also has an internal compression Liquid Oxygen Pump to fill dry gaseous oxygen in cylinders.

We also undertake supervision of Installation and Commissioning of the SANGHI-ORG Oxygen Plant.

 

ASU & Expansion Engine of 600 cum/hr Oxygen Plant          M.S.Battery for 600 cum/hr Oxygen Plant
 
Plant Specifications

1. Production Capacity - The plant is very versatile and can be set for a cycle to produce any one of the following alternatives:-

 
OXYGEN PRODUCTION NITROGEN PRODUCTION
  Alternative Gas Quantity Cu.M./Hr. Gas
Purity %		 Product Pr. Kgs/cm2 Gas Quantity Cu.M./Hr. Gas
Purity %		 Product Pr. Kg/cm2
1. SANGHI-ORG 80 80 99.5 150 *275 96 0.1
1A. SANGHI-ORG 80 70 99.5 150 *250 99.5 0.1
2. SANGHI-ORG 100 100 99.5 150 *450 96 0.1
2A. SANGHI-ORG 100 90 99.5 150 *400 99.5 0.1
3. SANGHI-ORG 200 200 99.5 150 *700 99.5 0.1
3A. SANGHI-ORG 200 200 99.5 150 *400 99.99 0.1
4 SANGHI-ORG 300 300 99.5 150 *1300 98.00 0.1
4A. SANGHI-ORG 300 300 99.5 150 *700 99.99 0.1
5. SANGHI-ORG 400 400 99.5 150 *1600 98.00 0.1
5.A SANGHI-ORG 400 400 99.5 150 *900 99.99 0.1
6. SANGHI-ORG 600 600 99.5 150 *2940 98.00 0.1
6. SANGHI-ORG 600 600 99.5 150 *1400 99.99 0.1

* About 100 CU.M./Hr of Nitrogen will be used for regeneration of driers for SANGHI-ORG 80.
* About 150 CU.M./Hr of Nitrogen will be used for regeneration of driers for SANGHI-ORG 100.
* About 300 CU.M./Hr of Nitrogen will be used for regeneration of driers for SANGHI-ORG 200.

The above product capacities are based on ambient conditions of 15oC temperature 760mm of Hg pressure and 50% relative humidity and 0.03% of Carbon Di-oxide is allowed as impurity.

Note:
1) High purity Nitrogen of upto 2 PPM can also be tapped simultaneously with a separate liquid Nitrogen pump in modified plants , at an additional cost.
2) Provisions can also be made for tapping upto 25% liquid oxygen / liquid nitrogen simultaneously with gaseous oxygen, at an additional cost.

2. Other Specifications:
  SANGHI-ORG 80 SANGHI-ORG 100 SANGHI-ORG 200 SANGHI-ORG 300 SANGHI-ORG 400 SANGHI-ORG 600
Air Pressure (starting) 55 Kgs/cm2 45 Kgs/cm2 45 Kgs/cm2 45 Kg/cm2 45 Kg/cm2 45 Kg/cm2
Air Pressure
(Normal operation)		 38 Kgs/cm2 35 Kgs/cm2 34 Kgs/cm2 34 Kg/cm2 34 Kg/cm2 34 Kg/cm2
Starting Time
(after defrost)		 8 Hours 8 Hours 8 Hours 8 Hours 8 Hours 8 Hours
Starting Time
(for short stop)		 2 Hours 11/2 Hours 1 Hour 1 Hours 1 Hours 1 Hours
Defrost Time 8 Hours 8 Hours 9 Hours 8 Hours 8 Hours 8 Hours
Defrosting cycle at normal conditions 6 Months 9 Months 9 Months 9 Months 9 Months 9 Months
Cylinder Filling Manifold connections 2 x 8 Nos. 2 x 12 Nos. 2 x 24 Nos. 2 x 40 Nos. 2 x 50 Nos. 2 x 70 Nos.
Cooling Water Requirement 20
Cu.m./hr.		 30
Cu.m./hr.		 50
Cu.m./hr.		 70
Cu.m./hr.		 80
Cu.m./hr.		 150
Cu.m./hr.
Inlet Cooling Water Temperature 25oC 25oC 27oC 27oC 27oC 27oC
Total Weight (approx) 26 Tons 29 Tons 45 Tons 50 Tons 80 Tons 100 Tons
Assembly Height 7.6 Metres 8.1 Metres 10.5 Metres 10.5 Metres 10.5 Metres 10.5 Metres
Maximum Roof Height 9.5 Metres 10 Metres 12 Metres 12 Metres 12 Metres 12 Metres
Area Required 12x12 Metres 12x12 Metres 35x15 Metres 35x15 Metres    
Power Supply Required 400 Volts & 230 Volts 400 Volts & 230 Volts 400 Volts & 230 Volts 400 Volts & 230 Volts 400 Volts & 230 Volts 400 Volts &
230 Volts
 
Note :
1) Electric motors can be supplied to suit specific power ratings in respective countries across the globe, if informed in advance.
2) Specifications of other capacity plants upto 750 Cu.m/hr capacity can be furnished on request.
Description of SANGHI-ORG Oxygen Plant

The free atmospheric air is sucked in by a multi-stage air compressor through a filter and compressed to the working pressure. After each stage, intermediate coolers and water separators are provided. The compressed air then passes through the (evaporation) pre-cooler and then to the molecular sieve battery where the moisture and carbon dioxide are removed from the process air. It then passes through the exchanger No. 1 where it is cooled by the out-going waste nitrogen and product oxygen.

A part of this cold air then flows through an expansion machine and the balance through the 2nd heat exchanger. The ratio of the two air streams is controlled by an expansion valve, RI.

Both these streams of air then unite in the lower pressure column where it partially liquefies.

The liquid air (rich air) then passes through the expansion valve R2 to the upper column which is at a lower pressure than the lower column. Similarly the liquid nitrogen (poor liquid) travels from the lower column to the upper column through an expansion valve R3 where the separation of oxygen and nitrogen occurs. Nitrogen being more volatile passes out as a gas from the top of the column and this waste nitrogen flows through both the heat exchangers cooling the in-coming air. Similarly product oxygen is also passed through the two heat exchangers to cool the in-coming air and then to the filling manifold via a liquid pump. If a small amount of air is vented out from the upper column, higher purity nitrogen can also be obtained from this plant. R4 Valve is provided in order to fasten cooling during start-up.

 
              300 cu.m./hr. Plant View                    600 cu.m./hr. Oxygen Column
 
300 cum/hr ASU & Expansion Engine and M.S.B Air compressor for Oxygen Plant
 
Nitrogen Compressor for 600 cum/hr Plant