New process controls BTEX in direct-fired TEG reboilers

06/12/2006
A process for combusting all vapors released from the glycol in a triethylene glycol (TEG) reboiler has been developed and successfully employed. The process, StripBurn, ensures 100% combustion in contrast to the method of injecting the volatile organic compounds (VOCs) into the reboiler’s stack.It also consumes less fuel because glycol flow rates can be lower with use of stripping gas and the complete combustion of “noncondensables.” In addition, the larger-than-normal amount of gas mixed with VOCs results in less VOC in the condensed water vapor from the overheads because the vapor-liquid equilibrium is shifted in such a way as to minimize the condensation of the VOCs....
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