Patent ID: 7306653
Filing Date: 2007-12-11
Classification: B01D

Abstract:
1. A method for venting steam containing volatile impurities from a heat recovery steam generator comprising: generating steam within a low pressure drum, wherein said steam contains at least a portion of said volatile impurities; attaching a condensing deaerating vent line to said low pressure drum, said condensing deaereting vent line having a plurality of fins to aid in thermal exchange with the environment: releasing at least a portion of said steam into said condensing deaerating vent line; wherein said condensing deaerating vent line condenses a portion of said steam in said vent line forming a condensate, wherein remaining steam in said condensing deaerating vent line contains an increased proportion of said volatile impurities forming a concentrated steam within said vent line; and venting said concentrated steam from said vent line.