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OXYGEN GAS PLANT
Brief History of Air Separation
In 1893, Linde discovered that the liquefication temperature of air can be obtained by means of direct throttling of compressed air as per Joules-Thomson effect, if the temperature of air is sufficiently lowered before expansion by making use of heat exchangers for heat transfer.
In a double column, lower column is designed for working pressure of 5 to 6 ata and top column for 1.5 ata. At the bottom of Lower column, liquid air containing approximately 30 to 40% of Oxygen by volume is collected and this rich liquid is taken to approximately middle of the top column, pure Oxygen Liquid is collected in the condenser. Liquid Oxygen of the upper column is used as a cooling agent to top column is used for further sub cooling the reflux or washing Nitrogen of lower column.
ALPHA OVERSEAS's OXYGEN GAS PLANT
High Quality & Low Cost, the AO. Oxygen Plant, with an efficient expansion engine,
lowers operating pressures to a remarkable 32-35 kg/cm2 , cuts power consumption
and adds to safety. A Molecular sieve Battery drier unit for separation of moisture
and carbon dioxide is another money-saving device in the AO 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.
Capable of simultaneously producing oxygen and High purity nitrogen, the AO plant has
an internal compression liquid oxygen pump to fill dry gaseous oxygen in cylinders.
Supervision of Installation and Commissioning of the plant is also undertaken by us.
Description of AO 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.
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
| Name Of Plant |
Gas Quantity |
GasPurity |
Product Pr. |
| 1. AO 80 |
80 Cu.M./Hr. |
99.5% |
150 Kgs/cm2 |
| 2. AO 80 |
70 Cu.M./Hr. |
99.5% |
150 Kgs/cm2 |
| 3. AO 100 |
100 Cu.M./Hr. |
99.5% |
150 Kgs/cm2 |
| 4. AO 100 |
90 Cu.M./Hr. |
99.5% |
150 Kgs/cm2 |
| 5. AO 200 |
200 Cu.M./Hr. |
99.5% |
150 Kgs/cm2 |
| 6. AO 200 |
200 Cu.M./Hr. |
99.5% |
150 Kgs/cm2 |
2. Other Capacities
OTHER INFORMATIONS
| Details |
AO 80 |
AO 100 |
AO 200 |
| Air Pressure Starting |
55 Kgs/cm2 |
55 Kgs/cm2 |
55 Kgs/cm2 |
| Air Pressure Normally |
35 Kgs/cm2 |
35 Kgs/cm2 |
35 Kgs/cm2 |
| Starting Time (After Defrost) |
7 Hours |
5-6 Hours |
5 Hours |
| Defrost Time |
8 Hours |
8 Hours |
8 Hours |
| Defrosting Cycle at normal conditions |
6 Months |
9 Months |
9 Months |
| Cylinder Filling Manifold Connections |
2 x 10 Nos. |
2 x 12 Nos. |
2 x 24 Nos. |
| Cooling Water Requirement |
15 Cu.m./hr |
20 Cu.m./hr |
50 Cu.m./hr |
| Inlet Cooling Water Temperature |
25 C |
25 C |
25 C |
| Total Weight Approx. |
26 Tons |
29 Tons |
50 Tons |
| Assembly Height |
7.6 Metres |
8 Metres |
10.5 Metres |
| Maximum Roof Height |
9 Meters |
10 Meters |
12 Meters |
| Area Required |
15 Metres x 12 Metres |
15 Metres x 12 Metres |
35 Metres x 15 Metres |
| Air Input |
444 N cu.m./hr. |
550 N cu.m./hr. |
1200 N cu.m./hr. |
| Power Supply Required |
400 Volts & 230 Volts |
400 Volts & 230 Volts |
400 Volts & 230 Volts |
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ALPHA OVERSEAS
REGISTERED OFFICE: B-52, Rama Road Industrial Area, Najafgarh Road, New Delhi - 110015
Tel: (91-11) 9212246801
E-mail: alphaoverseas8@yahoo.com |
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| ALPHA OVERSEAS, India |
Web Site Designed By Web Consultants Ltd, Hyderabad
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