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Plant Specifications:-
Production Capacity - The plant design is very versatile and can be set to produce varying combinations of Oxygen & Nitrogen in gaseous and liquid form.
Sr. No.
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Plant Model
|
Quantity Oxygne / Nitrogen
|
Gas Purity
|
Product Pr.
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1.
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SANGHI OXX 50
|
50 cu.m./Hr
|
99.6%
|
150/300 Kgs/cm2
|
2.
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SANGHI OXX 80
|
80 cu.m./Hr |
99.6% |
150/300 Kgs/cm2 |
3.
|
SANGHI OXX 110
|
110 cu.m./Hr |
99.6% |
150/300 Kgs/cm2 |
4.
|
SANGHI OXX 150
|
150 cu.m./Hr
|
99.6% |
150/300 Kgs/cm2 |
5.
|
SANGHI OXX 180
|
180 cu.m./Hr |
99.6% |
150/300 Kgs/cm2 |
6.
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SANGHI OXX 200
|
200 cu.m./Hr |
99.6% |
150/300 Kgs/cm2 |
7.
|
SANGHI OXX 250
|
250 cu.m./Hr |
99.6% |
150/300 Kgs/cm2 |
8.
|
SANGHI OXX 300
|
300 cu.m./Hr |
99.6% |
150/300 Kgs/cm2 |
9.
|
SANGHI OXX 400
|
400 cu.m./Hr |
99.6% |
150/300 Kgs/cm2 |
10.
|
SANGHI OXX 500
|
500 cu.m./Hr
|
99.6% |
150/300 Kgs/cm2 |
11.
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SANGHI OXX 600
|
600 cu.m./Hr |
99.6% |
150/300 Kgs/cm2 |
12.
|
SANGHI OXX 800
|
800 cu.m./Hr |
99.6% |
150/300 Kgs/cm2 |
13.
|
SANGHI OXX 1000
|
1000 cu.m./Hr |
99.6% |
150/300 Kgs/cm2 |
Process Description of Oxygen Plant / Nitrogen Plants
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 cascade 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 & an expansion valve R1. Both these streams of air then unite in the lower pressure column where it partially liquefies. The lower column is consisting of a tower of specially designed trays through which the liquid air is partially separated to form rich liquid (Higher Oxygen Content) in the lower part of the column & poor liquid (Lower oxygen Content) in upper part of the column.
The rich liquid then passes through the expansion valve R2 to the middle of 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. In the upper column the separation of oxygen and nitrogen occurs by distillation through a second tower of trays due to differences in their boiling point. 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 speed-up cooling during start-up. Some portion of nitrogen is used for regenerating the molecular sieve driers.
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