ENERGY EFFICIENT GASIFICATION BASED MULTI GENERATION APPARATUS EMPLOYING ADVANCED PROCESS SCHEMES AND RELATED METHODS

摘要

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 includes a gasification system configured to generate raw syngas feed from a carbon-based feedstock, and an acid gas removal system configured to remove acidic contaminants from the raw syngas feed to thereby provide a treated syngas feed. The gasification system includes a gasification reactor, a syngas fluid cooler reactor, and a soot ash removal unit comprising a soot quench column, a soot separator, a soot filter, a soot scrubber, and a gasification system energy management system having a conventional set of heat exchanger unit and an added set of heat exchanger units to enhance energy efficiency. The acid gas removal system includes a reactor, an acid gas contaminant absorber, a solvent regenerator, and an acid gas removal system energy management system having a conventional set of heat exchanger unit and an added set of heat exchanger units to enhance energy efficiency.

主权项

1. A gasification-based multi-generation apparatus, comprising one or more of the following:
an acid gas removal system configured to remove acidic contaminants from a raw syngas feed to thereby provide a treated syngas feed; and a gasification system configured to generate the raw syngas feed from a carbon-based feedstock; the acid gas removal system comprising an acid gas contaminant absorber, a solvent regenerator, and an acid gas removal system energy management system, the acid gas removal system energy management system comprising one or more of the following:
a first acid gas removal system process-to-process heat exchanger unit positioned to receive a hot condensate stream received from the gasification system and the raw syngas feed from the gasification system to provide heat energy to the raw syngas feed and to cool the hot condensate stream from the gasification system,a second acid gas removal system process-to-process heat exchanger unit positioned to receive the hot condensate stream received from the gasification system and the treated syngas feed from the acid gas contaminant absorber to provide heat energy to the treated syngas feed and to further cool the hot condensate stream from the gasification system,a third acid gas removal system process-to-process heat exchanger unit positioned to receive a reactor effluent bottom stream from a contaminant hydrolysis reactor and at least a portion of a rich solvent bottom stream from the acid gas contaminant absorber to provide heat energy to the rich solvent bottom stream and to cool the reactor effluent bottom stream,a fourth acid gas removal system process-to-process heat exchanger unit defining a solvent regenerator reboiler positioned to receive at least a portion of a soot scrubber bottom stream received from the gasification system and a solvent regenerator tray stream extracted from a solvent stream tray of the solvent regenerator to provide heat energy to reboil the extracted solvent regenerator tray stream and to cool the soot scrubber bottom stream, anda fifth acid gas removal system process-to-process heat exchanger unit positioned to receive at least a portion of a polished cold condensate stream received from a condensate polishing plant or facility, and a solvent regenerator top stream from the solvent regenerator to provide heat energy to the at least a portion of the polished cold condensate stream and to cool the solvent regenerator top stream; and the gasification system comprising a gasification reactor and a gasification system energy management system, the gasification system energy management system comprising one or more of the following:
a first gasification system process-to-process heat exchanger unit positioned to receive the polished cold condensate stream and an overhead stream of a sour water stripper to add a thermal load to the polished cold condensate stream and to cool the overhead stream of the sour water stripper,a second gasification system process-to-process heat exchanger unit positioned to receive the polished cold condensate stream having the added thermal load from the overhead stream of the sour water stripper and to receive at least a portion of an oxygen feed to the gasification reactor to provide heat energy to the at least a portion of the oxygen feed and to remove at least a portion of the added thermal load added to the polished cold condensate stream,a third gasification system process-to-process heat exchanger unit positioned to receive a wastewater bottom stream from the sour water stripper and to receive at least a portion of the oxygen feed to the gasification reactor to provide heat energy to the at least a second portion of the oxygen feed to the gasification reactor and to cool the wastewater bottom stream from the sour water stripper, anda fourth gasification system process-to-process heat exchanger unit positioned to receive a hot condensate stream and the oxygen feed to the gasification reactor to provide heat energy to heat the oxygen feed to the gasification reactor and to cool the hot condensate stream.