On-site nitrogen generator is the most cost effective way to prevent the negative effects of oxidation for edible oils and other food products. Highly used for many applications in the food and beverage industry, on-site nitrogen generators make a better option over gas cylinders because they eliminate the expenses and CO emissions associated with truck deliveries.
Most on-site nitrogen generator models available on the market are free-standing and are housed in a skid-mounted or cabinet (it will depend on the quantity of nitrogen needed). Standard features usually include high-efficiency, sterile grade air-filters and coalescing pre-filters with automatic drains. Setting up this type of generator is pretty easy. All you have to do is connect a standard compressed air line to the inlet of the nitrogen generator and connect the outlet to the nitrogen line.
Membrane vs. Pressure Wwing Adsorption Nitrogen Generators
There are two types of on-site nitrogen generators: membrane nitrogen generators and pressure swing adsorption nitrogen generators. Choosing between them two will depend mostly on the purity of nitrogen needed for the application in the matter.
Membrane Nitrogen Generators
These nitrogen generators use a technology that divides the compressed air into two streams – one stream is 95% – 99% nitrogen while the other stream contains oxygen, water vapor, carbon dioxide, and other gases. Because they don’t need electricity to generate nitrogen, they can be applied in Class-1 explosion- proof environments without any concerns.
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Pressure Swing Adsorption Nitrogen Generators
This type uses a high-efficiency pre-filtration to remove all contaminants from the compressed air stream. After the filtration, dual beds filled with carbon molecular sieve is used to absorb oxygen, water vapor and carbon dioxide. This ensures all contaminants are captured at high pressure and release at low pressure, while allowing the nitrogen to pass through.
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Cycling from high to low pressure regenerate the beds and allow a sustainable stream of pure nitrogen. A last sterile grade filter ensures any microbial contamination is removed.
It is important to mention that both membrane and pressure swing adsorption on-site nitrogen generators produce pure nitrogen, flow pressures and rates. And in addition to providing a significant cost saving, they also represent a sustainable approach to the supply of nitrogen, simplifies the production process and increase operational efficiencies.
When it comes to protecting oils and other foodstuffs from the oxidative effects of air, pressure swing adsorption on-site nitrogen generators makes a better choice since they deliver a 99.9% pure nitrogen stream.
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