Gasification Multi-Generation Heat Exchanger Networks
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Solution Overview
Problem
Carbon-based feedstock-gasification multi-generation facilities face challenges in achieving significant energy efficiency and reducing greenhouse gas emissions while maintaining operability and retrofitability for future expansions, with existing energy integration methods being suboptimal.
Innovation Solution
Implementation of advanced energy integration processes through a gasification-based multi-generation apparatus that includes an acid gas removal system and a gasification system, utilizing heat exchanger networks to optimize energy management across multiple plant systems, such as hydrogen recovery, condensate handling, sour water stripping, air separation, and power generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional energy integration methods are used in gasification-based multi-generation facilities, then the facilities can operate and produce multiple commodities, but energy efficiency is suboptimal and greenhouse gas emissions are not sufficiently reduced
Solution Approach 1:
The patent combines multiple separate plant systems (gasification, acid gas removal, hydrogen recovery, condensate handling, sour water stripping, air separation, power generation) into an integrated energy management system where heat exchanger networks transfer thermal energy between processes. This merging of previously independent systems enables optimal energy utilization across the entire facility, achieving 30% or more reduction in heating energy utility-based GHG emissions while maintaining operational complexity at a manageable level through systematic integration.
Solution Approach 2:
The heat exchanger networks serve multiple functions simultaneously: they transfer heat between different process streams, provide heating and cooling duties for various units, enable energy recovery from hot effluent streams, and supply thermal energy for steam generation and process heating. This multi-functionality allows a single energy integration system to address multiple energy efficiency opportunities across the gasification-based multi-generation facility.
2Object-generated harmful factors
If advanced energy integration processes are implemented, then GHG emissions are reduced by 30% or more, but the system complexity and integration requirements increase
Solution Approach 1:
The patent converts waste heat from hot effluent streams that would otherwise be discarded into useful thermal energy for heating and steam generation in other process units. By implementing heat exchanger networks that capture and redistribute this waste thermal energy, the system transforms a harmful environmental effect (heat loss leading to GHG emissions from utility heating) into a beneficial resource that reduces overall energy consumption and GHG emissions by 30% or more.
3Adaptability or versatility
If existing energy integration methods are used, then facilities can maintain operability for current processes, but adaptability for future expansions is limited
Solution Approach 1:
The energy integration system is designed as a modular network of heat exchangers that can be selectively activated or deactivated based on operational requirements. This segmentation allows the facility to maintain operability for current processes while enabling future expansions by adding or removing specific heat exchanger connections without requiring complete system redesign, thereby improving adaptability and retrofitability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution results in a 30% or more reduction in heating energy utility-based GHG emissions and enhanced energy efficiency, making the facilities more 'green' and adaptable for future expansions by integrating energy management across various plant processes.
Implementation Method 1
utilizing heat exchanger networks to optimize energy management across multiple plant systems
Implementation Method 2
heat exchanger networks to optimize energy management
Implementation Method 3
Gasification is a process that converts carbonaceous materials into carbon monoxide, hydrogen and carbon dioxide. This is achieved by reacting the material at high temperatures (>700 °C), without combustion, with a controlled amount of oxygen and/or steam.
Implementation Method 4
heat exchanger networks to optimize energy management
Implementation Method 5
heat exchanger networks to optimize energy management
Data Source
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AI summary
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.