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by gas product | by technology

Company products

Membrane nitrogen plants

One of the main types of products produced by GRASYS is the serial membrane nitrogen plants МА and custom-made membrane plants designed to customer specific terms of reference.

Where gaseous nitrogen is required with the purity of up to 99.95% and the system capacity not exceeding 1,500 nmі/hr or with lower purity at the rate of 5,000 nmі/hr, the optimal variant is the use of membrane nitrogen plants. Where the customer requires high purity nitrogen — 99.95% to 99.9995%, unachievable with membrane technology, it is reasonable to choose adsorption nitrogen plants.

The main assemblies of GRASYS membrane plants are the compressor unit, air treatment unit, gas separation unit and the control system. The gas separation unit consists of specially configured modules producing required purity nitrogen from atmospheric air. Due to the use of the most recent developments, GRASYS nitrogen plants are exceptionally reliable, with membrane unit useful life of up to 180,000 hours of continuous operation.

Membrane nitrogen plants operate in a fully automated mode, with automatic support and monitoring of working parameters. No manned attendance is required during the plant operation. The option of flexible adjustment of the product nitrogen purity is another significant advantage of GRASYS nitrogen systems.

Membrane plants for nitrogen production find extensive application in almost all spheres of human activity where extremely high nitrogen purity is not required. The overwhelming majority of gaseous nitrogen applications is determined by it inert properties; it is used in commercial volumes in the oil and gas complex, at chemistry, metallurgy and food industry facilities and in many other industries.

Basic performance specifications

Parameter	Value
Product nitrogen parameters
–Nitrogen purity, %	95–99.95
–Gas mixture volume recovery, nmі/hr ¹⁾	5–5000
–Pressure, barg	5–40
–Dew point, °С	−40…−60
Ambient air temperature
–during operation, °С	+5…+40
–during storage, °С	−20…+50
Warm-up time, max., minutes	10
Membrane modules useful life (capacity reduction by 10%)	130–180