Method and for removing a contaminant from a fluid feed stream by using heated separator and exchanger

摘要

There is disclosed a method for removing a contaminant from a fluid feed stream containing the contaminant. The method comprising the steps of providing a feed stream and heating it in a first step to at least partially remove some of the contaminants and recover energy from a concentrate and distillate generate. Further heating the feed stream in a second heating step in a heated separator generates a saturated vapour fraction and a concentrate liquid contaminant fraction. The vapour fraction may be compressed to generate a temperature differential in the reboiler exchanger with the vapour fraction being passed into contact with a reboiler exchanger to provide a stream of condensed vapour from the reboiler. At least a portion of said concentrate is circulating through said reboiler exchanger and said heated separator to maintain a ratio of circulating mass to vapour mass of about 300 to about near 2. The mass of the vapour is equal to mass of distillate obtained by compression if the vapour for preventing contaminating of heated surfaces. Part of the portion concentrated contaminants are removed.