System for generating power from a syngas fermentation process

Abstract

A system and process is provided for generating power from a syngas fermentation process. The process includes contacting hot syngas having a temperature above about 1400° F. with cooled syngas to produce a pre-cooled syngas having a temperature of 1400° F. or less at an inlet of a waste heat boiler. A waste heat boiler receives the pre-cooled syngas and is effective for producing waste heat boiler high pressure steam and a cooled syngas.

1 - 12 . (canceled) 
     
     
         13 . A system for generating high pressure steam from a syngas fermentation process, the system comprising:
 a waste heat boiler positioned to receive syngas having a temperature of 1400° F. or less, the waste heat boiler effective for producing waste heat boiler high pressure steam and cooled syngas;   a vent gas burner positioned to receive lean syngas from a fermentor, the vent gas burner effective for producing hot vent gas burner gas;   a vent gas boiler superheater positioned to receive the hot vent gas burner gas, the vent gas boiler superheater effective for producing vent gas boiler high pressure steam; and   a steam mixer positioned to receive and mix the waste heat boiler high pressure steam and the vent gas boiler high pressure steam to produce a combined high pressure steam.   
     
     
         14 . The system of  claim 13  wherein the blended syngas has a temperature of about 600° F. to about 1400° F. at an inlet of the waste heat boiler. 
     
     
         15 . The system of  claim 14  wherein the blended syngas has a temperature of about 600° F. to about 900° F. 
     
     
         16 . The system of  claim 13  wherein the waste heat boiler high pressure steam has a pressure of about 50 psig to about 950 psig. 
     
     
         17 . The system of  claim 13  wherein the vent gas boiler gas has a temperature of about 1500° F. to about 3000° F. 
     
     
         18 . The system of  claim 13  wherein the vent gas boiler high pressure steam has a pressure of about 600 psig to about 950 psig. 
     
     
         19 . The system of  claim 13  wherein the combined high pressure steam has a pressure of about 600 psig to about 950 psig. 
     
     
         20 . The system of  claim 13  wherein the combined high pressure steam is utilized for production of power. 
     
     
         21 - 30 . (canceled)