Air-N-Gas Process Technologies

PSA Nitrogen Plant
Product Description

PSA Nitrogen Plant:
  • Fully Automatic Operation requiring no special attention
  • Generates Nitrogen as and when required
  • Easy to install and maintain
  • Purity of Nitrogen upto 99.9999% can be achieved
  • Generates Nitrogen at almost 1/10 th cost of cylinder nitrogen
  • Proven Technology
  • More than 1000 Plants based on PSA Technology operating successfully in India.
  • The compressed air is passed through a Twin Tower PSA module interconnected with automatic changeover valves.  At the bottom of PSA towers, Activated Alumina is provided which has tendency of adsorbing moisture from compressed air.  After passing through this bed of Activated Alumina air gets dried.  Supply of dry compressed air from this layer of desiccant (activated alumina) will be continuous without any interruption.  Dried compressed air will now come in contact with bed of carbon molecular sieves (CMS).  Carbon Molecular Sieves are special grade of adsorbant which have the property of preferential adsorption of oxygen molecules. At a time one tower remains under nitrogen production cycle, whereas the other tower undergoes regeneration which is achieved through depressurization of the tower to atmospheric pressure. The two towers of PSA modules are inter-connected with automatic changeover valves through pneumatic signal given by solenoid valve which in turn get the electrical signal from the timer provided in the control panel.  The changeover time cycle will be 1 + 1 minute.  The outgoing nitrogen gas is sent to a surge vessel where the minimum nitrogen pressure will be maintained with the help of Back pressure Regulator.  The product nitrogen will now be sent to the consumer point through a pressure reducing valves at required pressure.
Downstream equipments for High Purity
Oxygen content in product nitrogen can be brought down to 1-3 PPM with the use of DEOXO Unit.
 
Palladium De-Oxo Unit:
In this unit the residual oxygen in Nitrogen From PSA Unit is mixed with Hydrogen and the mixture is passed over Palladium Catalyst where Hydrogen reacts with Oxygen and makes water. The reaction is exothermic and the outlet gas is cooled down in After-Cooler where moisture vapour condences and it is separated and drained out in moisture separator.
This nitrogen still contains moisture in vapour form which is removed in Gas Dryer and the outlet Nitrogen is at (-) 60 Deg C Dew Point (Atm).
 
The final product Nitrogen composition is
Oxygen                          3 ppm
Hydrogen                       0.2% (Adjustable)
Dew Point                      (-) 60 Deg C
Nitrogen                         Balance
 
Copper De-Oxo Unit:
Alternately where hydrogen in product nitrogen is not acceptable, Copper De-Oxo units are used. In this system, one tower remains in the Oxygen removal cycle, whereas, the other tower undergoes regeneration of the catalyst. Oxygen removal is obtained by reaction of Oxygen present in Nitrogen with Copper Catalyst as per following equation.
2Cu  +  O2  =   2CuO
This reaction takes place at around 1800C.  For this purpose tower is provided with an embedded heater. Raw-nitrogen passes through the heater before it comes in contact with the copper catalyst. The out-going nitrogen will be totally free from oxygen. As indicated above, the spent catalyst i.e. CuO is converted back to copper by injecting Hydrogen – Nitrogen mixture in the tower under regeneration, so that copper catalyst gets regenerated as per following reaction:
CuO   +   H2    = Cu  +   H2O
This reaction also takes place at a temperature of around 1800C. which is achieved by the heater embedded in the tower. Nitrogen – Hydrogen mixture, which is used for reaction of spent catalyst is vented to atmosphere. Each tower of copper catalyst remains in Oxygen removal cycle for a period of 8 hours and towers then get changed over automatically which the help of sequence timer provided in the control panel. Pure nitrogen gas coming out of Copper Catalyst De-oxo Reactor will be at 2000C. and its temperature will be brought down to ambient level through an after-cooler which is a shell and tube type heat exchanger. The pure and dry nitrogen gas at ambient temperature.
 
Following will be the product gas composition at the outlet of Copper Catalyst system:
i)  Oxygen                                :  1 ppm (Max.)
ii) Hydrogen                            :  Nil     
iii)   Nitrogen                           :  Balance
iv) Dew Point                          :  (-)600C.
v)  Gas pressure                     :  5.0 Kg/cm 2g
vi) Gas temperature              :   Ambient
 
Salient Features:
  1. The PSA type gas generator is fully automatic and the gas of proper specification is made available within short period after start-up.
  2. This type of gas generator does not require any fuel.
  3. Since the feed stock for this gas generator is air, there is no problem like soot formation or presence of Co2 etc. – the common problem in fuel combustion based gas generator.
  4. The gas generator is very compact requiring very small floor area.
  5. Depending on the pressure in the nitrogen storage tank, the gas generator keeps running with ON/OFF operation like compressed air installation.  Therefore, the gas generator would work only to the extent of meeting your gas requirement as and when needed.

About Us:

Air-N-Gas Process Technologies was established in the year 2007, with an aim to boost the technical advances in the field of Adsorption based Gas Separation Systems, Air Filters and Air Dryers. In this short span of time, we have earned ourselves a niche in the air dryers industry and have established a great rapport amongst the leading manufacturers, exporters, traders and suppliers.

Supported by a group of efficient technocrats, we are headed by Mr. Shailesh Verma (B.Tech-Mech, DMM), who has accumulated a rich experience of more than 19 years in the respective field. Today, we have emerged as a specialized concern in designing, manufacturing, exporting, site installation and commissioning of a varied range of products like Nitrogen/Oxygen Gas Generators, Compressed Air Drying Units, High/Low Pressure Dryers, Air Filters, After Coolers, Auto Drain Valves, Air Receivers,  Pressure Vessels, Air & Water Chillers, etc.


Delivering a high on performance range of products and services, we aim to be a leading name as a manufacturer, exporter and service provider in the concerned field. Experimental outlook and innovative designing power have enabled us to established a firm base, and we are sure that the same will take us ahead as well.

 
Manufacturing Facilities:
 
We have State of art manufacturing units, which are locate at Ahmedabad. The unit is spread across a sprawling area with an appreciable installed capacity and latest equipments to meet the bulk requirements of our clients. We are facilitated machines and equipments, which enables us to fabricate our range of Industrial Gas Generators, Compressed Air Dryers and Ammonia Cracker as per the set industry standards.
Our sophisticated machines ensure effective and fast production of our range with ease. Further, our team of experts develops these products as per the specifications provided by our clients. We have installed, which has helped us to preserve a good hold in the market of nitrogen gas plants.
 
Quality Assurance:
 
Being a quality driven organization, we have laid our foundation in offering only high quality range of Industrial Gas Generators, Compressed Air Dryers and Ammonia Cracker. For this, we have developed a sophisticated quality management department, wherein several tests are conducted on our range to deliver defect free and high performing range to our clients. Quality being an integral part of our products, we have employed a team of quality controllers, which is well versed in their respective domain of work and ensure that the range of
 
Several tests are conducted to check our range is based on the following parameters:
  • Performance
  • Functionality
  • Reliability
Services We Offer:
  • Upgradation and capacity enhancement of PSA Gas Generators
  • Purity Correction and system modification for PSA Gas Generators
  • Optimal Setting of process parameters for efficient operation
  • Recommissioning and servicing of PSA Plants
  • Annual Maintenance Contract (Comprehensive and Non-comprehensive)
  • Supply of all types of Dessicants and Catalysts for Gas Generators and Air Dryers
  • Supply of all types of spares compatible to all the makes of Gas Generators/Dryers.

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