D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 9/153 (2006.01) D21C 11/06 (2006.01)
Patent
CA 2159444
A method for reusing spent gas from an ozone bleaching reactor (130) includes steps for removing lint from the spent gas, compressing it, passing it through a reactor (130) in which hydrocarbons and carbon monoxide are destroyed by oxidation, and cooling the gas. Injecting the gas together with compressed air into a mist separator (270) for removal of any mist from the gas and then passing the gas through a pressure swing adsorption device (276) in which nitrogen, carbon dioxide, trace water vapor, and other trace elements may be removed by adsorption on a molecular sieve material. The recycled gas is fed to an ozone generator (100) and from there to an ozone/pulp bleaching reactor (130). By appropriate selection and layering of molecular sieve materials in the pressure swing adsorption device, it is possible to provide selective removal of a variety of gaseous elements from a gas stream.
Beloit Technologies Inc.
Swabey Ogilvy Renault
LandOfFree
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