Nitrogen and Oxygen

inmatec logo.jpg - 30.64 Kb

.

Nitrogen and Oxygen can be generated by two different methods:

  • Membrane Systems
  • Pressure Swing Adsorption (PSA) Systems

big_3.jpg - 38.40 Kb

Membrane

Nitrogen

    The generators are fed with normal compressed air, as it is available at nearly any business site. The compressed air is cleaned by filter units mounted upstream and subsequently flows into a membrane module composed of multiple small hollow fibres. The various components contained in the air, such as water vapour, oxygen, nitrogen, argon and carbon dioxide diffuse through the hollow fibre membrane at different rates according to their respective molecular structure. Oxygen, carbon dioxide and hydrogen having a high diffusion rate are eliminated very rapidly from the air mixture. Nitrogen has a low diffusion rate and penentrates the hollow fibre membrane very slowly, so becoming enriched on its path through the hollow fibres. Nitrogen purity is determined by the rate of diffusion of the gas. By variation of pressure and volumetric flow it is possible to adjust the nitrogen generator to the exact supply quantity and purity of nitrogen required. The core piece of the nitrogen generator is a hollow fibre membrane. This part is made of a synthetic material during an elaborate process combined with well defined temperature and pressure data, involving a specific solvent. The performance of each generator is determined by the length and arrangement of each single hollow fibre membrane.
    .digikamera 209.jpg - 4.05 Mb
    PSA (Pressure Swing Adsorption)
    Nitrogen
    The technology of PSA provides for nitrogen provisioning at purity grades of up to 99.999% and capacities ranging from 0.5 - 2.000 NM3/h. The super pure and even ultra pure nitrogen quality distinguishes from the IMT-PN nitrogen generators in the PSA range.The nitrogen generators produce nitrogen from compressed air available on site or supplied by specific dedicated air compressor. The air is cleaned by preliminary filtration which eliminates impurities such as humidity, oil vapours, particles and hydrocarbons. The filtrated compressed air flow is then subsequently fed into the CMS filter being kept in filter mode. During its passage through the filter, oxygen and carbon dioxide molecules are eliminated from the air and the pressure dew point is lowered. As a result a clean, dry flow of high purity nitrogen gas is created, which is appropiate to be used in various application areas.
    Options: alert function, analyser units, operation hour counter, booster for pressure up to 300 bar, touch screen, sms (short message system), flow meter, special voltage design.
    .
    Oxygen
    The PSA technology ensures on-site provisioning of oxygen at purity rates of up to 99.5% and capacities from 0.5 - 2.000Nm3/h.
    Normal compressed air available on-site or supplied by specific dedicated air compressor is required. The air is first cleaned by preliminary filters which eliminate impurities such as humidity, oil vapours, particles and hydrocarbon.

    The filtrated compressed air flow then subsequently passes through two molecular sieves of zeolite which eliminate nitrogen and carbon dioxide molecules from the compressed air. Both sieves switch alternately from filtration mode to regeneration mode, in order to ensure a continuous oxygen flow. The oxygen produced under this process is appropriate for use in various application areas.