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Nitrogen Generators UK

Nitrogen Generators UK: Why use a Nitrogen Generator?

Due to its versatility, nitrogen use is becoming increasingly popular in a number of industries including plastic moulding, chemical, food & beverages and packaging. The key benefit of having a Nitrogen Generator on-site is cost; up to 40% savings can be made when compared to buying nitrogen cylinders. Glaston engineers are highly qualified and have extensive experience in the installation and maintenance of nitrogen generators. For more information on our recent installations please see our Nitrogen Generators UK installations on the case studies page.

Our team of engineers can arrange an initial consultation to help determine the recommended solution for your on-site nitrogen requirements. They will then offer professional, practical advice to ensure you are confident in you choice of nitrogen generation system. Glaston engineers are highly experienced in the supply, installation and maintenance of nitrogen generators.

Nitrogen Generators UK: Which type of Nitrogen Generator is suitable for you?

Dependent on purity, flow rate and a number of other considerations, there are many options when supplying nitrogen. The indicative optimal supply options for nitrogen generators are shown below.

Nitrogen Generators UK: Membrane Nitrogen Generators

Optiminal purity range: 90% to 99.0%
Optimal flow rate: 1-600 Nm³/h
Cost advantage over vendor-supplied liquid: up to 50%

 

 

 

 

 

 

Nitrogen Generators UK: The diagram shows a Membrane Separation module with its fibre bundle, and the permeation rate of various gases.

Membrane nitrogen separation became commercially available in the early 1980s. It is the most robust of the nitrogen separation technologies. Compared to Pressure Swing Adsorption (PSA) technology, membranes use more energy, but have lower maintenance costs. Membranes are best suited for purities up to approx. 99%, and nitrogen demand of up to around 600 Nm³/hr.

Oxygen and nitrogen in compressed air are separated by the relative speed of permeation through the side wall of hollow polymer fibres. Oxygen molecules permeate through the fibres faster than nitrogen molecules, enabling them to be selectively exhausted. Nitrogen gas purity increases as the flow proceeds down the fibres. Depending on the residence time in the membrane, nitrogen purity of better than 99.99% can be achieved. If you require higher purity levels, other separation technologies are more cost effective.

Nitrogen Generators UK: PSA Nitrogen Generators

Range Purity: 99% to 99.995%
Flow rate: 1-1000 Nm³/h
Cost advantage over vendor-supplied liquid: up to 50%

Pressure Swing Adsorption (PSA) is cost effective for on-site nitrogen generation at purities higher than 99% (purities as high as 99.995% are possible), and in high energy cost regions for lower purities down to 97%.

The air is separated by compression on a bed of carbon molecular sieve (CMS), which preferentially adsorbs the oxygen. At the same time, in a second drum of CMS, the pressure is lowered, thus releasing the adsorbed oxygen which is exhausted. This bed of CMS now denuded of oxygen is again ready for a further compression cycle of adsorption.

At Glaston, our team of engineers have expertise in the design, supply, and maintenance of nitrogen generators in the UK. For more information about our range of products and services, or for a bespoke quote please contact us today.

Read our latest case study on the installation of nitrogen generators for soft drinks giant, Calypso here.