Energy-efficient gasification-based multi-generation apparatus, facilities, or systems, and methods of modifying existing gasification-based multi-generation apparatus and the various conventional
thermal coupling arrangements, are provided. An exemplary gasification-based multi-generation apparatus comprises an
acid gas removal
system configured to remove acidic contaminants from a raw
syngas feed to thereby provide a treated
syngas feed and an
acid gas removal
plant or facility; a gasification
system configured to generate the raw
syngas feed from a carbon-based feedstock and comprising a gasification
plant or facility; and a condensate
polishing plant or facility. The
acid gas removal
system comprises an acid gas contaminant absorber, a
solvent regenerator, a contaminant
hydrolysis reactor, and an acid gas removal system
energy management system. The acid gas removal system
energy management system comprises a sixth acid gas removal system process-to-process
heat exchanger unit positioned to receive at least a portion of a polished cold condensate
stream from the condensate
polishing plant or facility to provide
heat energy to the at least a portion of the polished cold condensate
stream. The gasification system comprises a gasification reactor and a gasification system
energy management system. The acid gas removal plant or facility is integrated with the condensate
polishing plant or facility through the at least a portion of the polished cold condensate
stream received by the sixth acid gas removal system process-to-process
heat exchanger unit.