Gas Pipeline Supply Oxygen Nitrogen Plants
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We offer highly advanced gas pipeline supply oxygen nitrogen plants (Low Pressure) which are extensively used in oxygen and nitrogen production industries. These are renowned for low power consumption, 100% reliability for oxygen gas quality, zero maintenance and other attributes.
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 | Small Capacity Plants | | |
| - Range 40 TO 800M3/hr.
- Purity oxygen -99.6% .Nitrogen -99.99% or 3PPM
- Operating Air Pressure- 0.6 TO 0.7Mpa
Special Features:
A few of the latest technological features incorporated into the Oxygen & Nitrogen plants are listed below.
• All plants use “Oil free” rotary screw /centrifugal oil compressor working between 0.6 to 1.0 mpa.
• All plants incorporate Aluminum Brazed exchangers and packed columns for high efficiency.
• Turbo expanders (Oil or Air Bearing) for trouble free operation.
• All plants above “500” are supplied with automatic PLC control.
• Engineering support along with complete quality control is provided by our company.
• We provide qualified engineers for Supervision, Installation and start up of all our plants as well as training of manpower at customers’ site.
• Very low power consumption with proven performance and virtually Zero maintenance required for the machines.
• 100% reliability for oxygen gas quality for industrial & hospital use.
Basic Principle
The air separation plant is a plant recovering oxygen and nitrogen from air simultaneously. It advance low pressure technology process of Boschi Italy using Rotary screw compressor (or low oil free piston compressor)and turbo expanders.
The feed air entering the Molecular Sieve purification system employed to remove the moisture and Co2 from the process air. The air is liquefied by cryogenic cooling using latest plate and fin high efficiency heat exchangers and turbo expanders. The liquid air separates into oxygen nitrogen and inert gases in the air separation column. |
| Medium Capacity Plants | | |
Medium Capacity Liquid Plants(32 TPD TO 320 TPD)
- Range: 1,000 TO 10,000M3/hr.
- Purity oxygen -99.6% .Nitrogen -99.99% or 3PPM
- Operating Air Pressure- 0.6 TO 0.7Mpa
Process Description
1. Air Compressor-Low Pressure
Air is compressed at a low pressure of 5-7 bar (0.5-0.7mpa). 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 compressor).
2. Pre Cooling System
The second stage of the process uses a low pressure refrigerant for pre-cooling processed air to temperature around 12 deg C before it enters the purifier.
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.
4. Cryogenic Cooling of Air by Turbo (Expander)
The air has to be cooled to sub zero temperatures for liquification & the cryogenic refrigeration & the cooling is provided by highly efficient turbo expander, which cools the air to temperature almost below -165 to-170 degC.
5. Separation of Liquid Air Into Oxygen and Nitrogen by 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 temp, 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 .
Air gets liquefied when it enters the air separation column & gets separated into oxygen & nitrogen by the process of rectification.
Liquid Oxygen is available at the outlet of the ASU at a purity of 99.6%.
Liquid Nitrogen is also available at the outlet as a alternate product at purity of 99.99%(upto 3ppm as required).Nitrogen gas will be available as a by product.
6. Compression of Oxygen filling in the Cylinder
The final product in the form compressed Oxygen/Nitrogen goes to the high pressure oxygen cylinders at 1 50 bar or upto higher as required.. Or for pipeline supply or captive consumption | Or for liquid plants to fill in cryogenic liquid tanks. |
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| Large Capacity Plants | | |
| Large Capacity Liquid Plants (320 TPD TO 1600 TPD)
- Range: 10,000 TO 50,000M3/hr
- Purity oxygen -99.6% .Nitrogen -99.99% or 3PPM
- Operating Air Pressure- 0.6 TO 0.7Mpa
Main Components
1.Air Compressor:
Rotary air compressors screw type can be used for smaller size plants upto 500m3/hr & 1000m3/hr. Centrifugal compressor can be used for higher size plants.
2. Air pre cooling system:
Air separation plants adopts chilling system in all air pre-cooling systems.
3. Air purification system:
This system beds of molecular sieve are used in the air purification system, it remove the Co2 & moisture for the process air at low-pressure.
4. Rectification Column:
The unit in cold box are all low pressure technology. This unit employs the latest state of the art plate and fin exchanger, condenser and sub-coolers. The column is supplied as a packed unit complete with all the control systems including digital flow-meters, temperature, pressure available with high purity upto 2-3 ppm nitrogen as a second product without loss in oxygen production.
5. Turbo-expander:
Turbo-expander is used for giving cooling to the air for the liquification process and braked by booster, so as to reduce the expanded air column,stabilize the upper columns working condition and reduce power consumption. The turbine expanders have complete trouble free working and long life and reliability.
6. Computer Control:
All the plants can be configured for automatic operation through a pc this will use a out switching valves of German or Japanese and motorized cryogenic valves on cold box. |
| Main Equipments : Gas Pipeline Supply Oxygen Nitrogen Plants | | |
We offer highly advanced gas pipeline supply oxygen nitrogen plants (Low Pressure) which are extensively used in oxygen and nitrogen production industries. These are renowned among our valued client for its effectual functioning.
1. Air compressor: Screw/ low pressure- type:
The advanced series which are accessible from the market have different combination of fulfilling client requirement for Low installation, Operating and maintenance costs, with high dependability and easy usage. These screw rotary compressors are trouble free and advanced.
Centrifugal Type:
(a)It is highly efficient, economical, consistent and is highly reliable source of air supply.
(b)It has very low maintenance cost which is very good for the compressor.
2. Pre-cooling system
The pre cooling system is highly effective skid mounted equipment and is offered with the primary purpose of cooling down the air to temperature of 5 to 8 degrees & helps in discharging of condensed water. Thesecompressorscompressors are of European origin.
3.Boschirsal Boschi Purifier
movBoschimoisture, carbon dioxide, hydrocarbons and gases which are considered as the impurities in the process of air separation. The structure includes the double layered molecular sieves from the “Zeochem” (Switzerland) with aluminZeochem acts as a absorbent. For the purity of the final product like oxygen and nitrogen in the air separation column, the process purifier is important for the entire process. This includes the 2 skid mounted molecular sieve regeneration batteries which
works on night shifts and switches for:
· Manually
· PLC control
4. Air separation unit (Cold Box)
In this unit the mixture of nitrogen and oxygen is divided by the difference in their liquefication temperatures.
With dliqueficationcation process and at temperatures below (–) 180 deg centigrade, the liquefied air is sent to
the lower and upper column.
The quality of final product ie oxygen and nitrogen in terms ofieuantity and quality is determined by the design
and efficiency of the ASU. The Boschi design includes the highly Boschient fin type aluminum heat exchangers
and column, in which the entire upper column is packed, thus lowering down the operational pressure and growing the oxygen, nitrogen and argon recovery. The highly effective argon is attained above the 1000M3/HOUR Oxygen Plants by the advanced techniques using the full rectification without using the hydrogen and de-oxo unit helps in saving down ode
oxoPower costs
· Operational costs
· Investment
These features make these machines highly effective and versatile with complete research and development.
5. Turbo expander
The Turbo expander is a gas bearing expansion refrigeration turbine that is much more efficient than any other expansion device. It is a gas bearing expansion refrigeration turbine which is highly effective than other expansion device. This
works on the technique of induced cooling via expansion because of which operational pressure is lowered and the performance of the distillation is stable for consistent production. |
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| Process Description : Gas Pipeline Supply Oxygen Nitrogen Plants | | |
| 1.COMPRESSION OF ATMOSPHERIC AIR
Air is compressed at a very pressure of 5-7 bar (kg/cm2). Air can be compressed at such low pressure by trouble free rotary compressor (Screw / Centrifugal Type/Oil free piston compressor of advanced technology are employed).
2. PRE COOLING SYSTEM
The second stage of the process uses a low pressure refrigerant for precooling the processed air to temperature around 12 deg C before it enters the purifier.
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 processed air before the air enters Air Separation Unit.
4. COOLING OF AIR BY Turbo(EXPANDER)
The air has to be cooled to sub zero temperatures for liquification & 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
5. SEPARATION OF LIQUID AIR INTO OXYGEN AND NITROGEN BY AIR SEPARATION COLUMN
Oil free, moisture free and Carbon Dioxide free air enters into low pressure fin type HEAT EXCHANGER where the air is cooled below sub zero temperatures by air expansion process in the turbo expander. Air gets liquefied when it enters the air separation column & gets separated into oxygen & nitrogen by the process of rectification.
Oxygen is available at the outlet of the ASU at a purity of 99.6%. Nitrogen is also available at the outlet as a second product at purity of 99.9% upto 3ppm simultaneously without loss of oxygen product.
6. COMPRESSION OF OXYGEN AND FILLING OF OXYGEN IN CYLINDERS
The final product in the form compressed Oxygen/Nitrogen goes to the high pressure oxygen cylinders at 150 bar or upto higher as required. This can be done by liquid oxygen pump is same models. We can use oil & water free compressor. |
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