nitrogen generator

nitrogen generator

nitrogen generator

A method of generating nitrogen, wherein compressed air is separated at elevated pressure by fractionation to produce a gaseous nitrogen product fraction and an oxygen-enriched liquid product fraction containing less than 80 mole percent of oxygen, a gaseous nitrogen product is taken at elevated pressure from the top gaseous nitrogen product fraction, a stream of the product oxygen-enriched fraction is vaporised by indirect heat exchange with condensing nitrogen separated in the fractionation, a liquid nitrogen product is generated with the gaseous nitrogen product by condensing nitrogen separated in the fractionation, and refrigeration for the method is created by expanding a stream of compressed air in a first expansion turbine with the performance of external work and by expanding at least part of the vaporised stream of the product oxygen-enriched fraction in a second expansion turbine with the performance of external work, characterised in that the said stream of compressed air enters the first expansion turbine at a pressure substantially in excess of the pressure at which the gaseous nitrogen product is taken but leaves the first expansion turbine at essentially the gaseous nitrogen product pressure, and in that at least part of the air separated in the said fractionation column is supplied from the first expansion turbine:

A nitrogen generator for performing the method claimed in claim 1, comprising a fractionation column operable to produce an elevated pressure gaseous nitrogen product and an oxygen-enriched air product containing less than 80 mole % of oxygen, the nitrogen generator also being able to co-generate a liquid nitrogen product, a first expansion turbine for expanding with the performance of external work a first stream of compressed air, a nitrogen condenser for condensing nitrogen separated in the fractionation column by indirect heat exchange with a vaporising stream of the product oxygen-enriched liquid air, and a second expansion turbine for expanding a stream of the vaporised product oxygen-enriched air with the performance of external work, characterised in that the outlet of the first expansion turbine communicates with the fractionation column.

The nitrogen generator according to claim 10, additionally comprising a further condenser for condensing nitrogen, the further condenser having passages therethrough for a stream of liquid comprising a mixture of oxygen and nitrogen taken from the fractionation column, the said passages communicating at their outlet end with a recycled compressor for returning the vaporised mixture to the bottom of the fractionation column.

POST COMMENT

The Benefits of Natural Gas Generators Utilize Magnetic Generators To Save Power Qualities of a Reputable Kohler Generator Supplier Portable Diesel Generators The Best Passive Income Generator Ever The Secret of the Magnetic Generator is Exposed Tesla Secret Generator Tesla Generators: Do They Stay Up To The Hype? Ability Conserving Guidelines - Tesla Free Of Charge Strength Generator What are the main components of a diesel generator? Magniwork Generator Could Be The Answer! 9 Reasons Why You Must Own A Magnetic Power Generator Tesla Strength Generator - How Tesla's Work Led To the Contemporary 7 Kilowatt Free of charge Power Generator