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Abstract

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.

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First Claim