“As a direct response to customer feedback, we develop the Modular series of On Site Nitrogen Membrane Generators to provide an instantly available, low cost nitrogen source, from an energy efficient package. We provide to our customers systems that can sit outdoors in any weather, a fully automatic system that can respond to the client flow demand”

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BELLELLI ENGINNERING has designed, engineered, manufactured and operated onsite gas generation systems for many years, which has created an outstanding global product line. Nitrogen (N2) constitutes 78.03% of the air, has a gaseous specific gravity of 0.967, and has a boiling point of -320.5°F (-195.8°C) at atmospheric pressure. It is colorless, odorless, and tasteless. Nitrogen is often used as an "inert" gas due to its nonreactive nature with many materials. However, nitrogen can form certain compounds under the influence of chemicals, catalysts, or high temperature. Commercial nitrogen is produced by a variety of air separation processes, including cryogenic liquefaction and distillation, pressure swing adsorption (PSA), and membrane separation. Gaseous nitrogen is used in the chemical and petroleum industries for storage tank blanketing and vessel inerting applications. It is also used extensively by the electronics and metals industries for its inert properties. Liquid nitrogen, produced by the cryogenic air separation process, finds wide use as a refrigerant in applications such as cryogenic grinding of plastics and food freezing. Adsorption - Standard and High-Purity PSAs Overview Bellelli Engineering High Purity Nitrogen Pressure Swing Adsorption (PSA) Systems offer a highly-reliable, low-cost nitrogen supply alternative with savings of up to 50% over traditional supply modes. The systems are available in a wide range of models that can be customised to suit each customer's application requirements. The design of the customised PSA systems is based on deep cooperation between BELLELLI ENGINEERING and Air Products. Technology at Work the World Over These extremely cost-effective nitrogen systems feature a proprietary adsorption process developed thinking to customers requirements. In our unique process cycle, oxygen, moisture, and carbon dioxide are removed from air through use of a molecular sieve to produce nitrogen gas with maximum efficiency. A System to Suit Your Application For each model, the type of molecular sieve, the compressor frame size, the operational cycle, and other internal process parameters can be optimised to meet your specifications for flow, purity, pressure and they can also be configured with advanced telemetry capabilities. Features • Proven proprietary PSA technology • Our diverse product line can achieve Oxygen content from 50,000 down to 5ppm • Few moving parts and simple engineering • Small footprint • Highly sophisticated PLC control • Integral Sound abatement • Economiser shutdown • Exclusive stayfill bed containment • Proprietary rapid clean-up technology • Remote monitoring telemetry system Benefits • Produces highly reliable nitrogen supply at your site • Liquid Nitrogen purity from PSA systems that deliver liquid Nitrogen purity without compromising flexibility or cost savings • Minimal maintenance and maximum reliability • Allows compact installation • Allows unattended operation and maintains highest efficiency • Environmentally friendly, meets international standards • Saves energy during periods of low demand • Extends bed life indefinitely • Allows quick equipment startup • BELLELLI ENGINEERING operating experience to provide total supply solution Options Available • Nitrogen booster compressor for high pressure storage and/or use • BELLELLI ENGINEERING supplies air compressor and air tank • Dual oxygen analysers • Pay meter quality flow meter • Remote monitoring via telemetry or analog signals for customer use (if required) • High specification design and construction for demanding environments • Professional start-up and/or complete after-service agreements for Sale of Equipment customers Process Description The standard PSA system is comprised of four major operations: Feed Air Compression; Feed Air Pre-treatment; Adsorption/Desorption; Product Delivery. Feed Air Compression Atmospheric air is elevated to high pressure by a packaged air compressor. Feed Air Pre-treatment The high-pressure feed air from the compressor passes through a mist eliminator to remove water droplets and entrained oil. The air then passes through the carbon filter to remove oil vapors prior to entering the buffer tank. Adsorption/Desorption The "treated" air enters an adsorption tower where it is contacted with carbon molecular sieve to remove oxygen. "Purified" nitrogen passes to product delivery operation. When the oxygen capturing capacity of the onstream adsorption tower is diminished, the feed flow process valves switch to a second adsorption tower. The first adsorption tower is then depressurised rapidly and purged to remove the adsorbed oxygen. When the second bed becomes saturated with oxygen, the feed flow process valves switch back to the first adsorption tower and the cycle begins again. Product Delivery The "purified" nitrogen enters a nitrogen receiver tank that provides gas to the adsorber vessels during product repressurisation and nitrogen buffer capacity. The nitrogen purity is continuously monitored by an oxygen analyser prior to delivery to the customer houseline. Should the oxygen level rise above the preset alarm point, the product delivery valves isolate any off-specification product from the customer houseline. The system will automatically enter a "clean-up" mode and product delivery will resume when the nitrogen purity is within specification. A flow control system prevents system overdraw. PRISM® PSA Performance The Standard nitrogen PSA system covers nitrogen purity from 50,000ppm down to 1,000ppm Oxygen content and nitrogen production rates up to 2,630 Nm3/hr. The High purity nitrogen PSA system covers nitrogen purity from 500ppm down to 5 ppm Oxygen content and nitrogen production rates up to 1,315 Nm3/hr.