Modular Direct Reduction System for Lower Capital Costs
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Solution Overview
Problem
The high capital costs associated with fabricating and assembling direct reduction systems for producing direct reduced iron (DRI) make them less competitive with conventional coal fired furnace systems, despite offering reduced carbon emissions and improved energy efficiency.
Innovation Solution
A modular direct reduction system comprising pre-fabricated, transportable reformer and heat recovery modules, which are fabricated off-site and assembled on-site, reducing capital costs and allowing for reuse across multiple systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If direct reduction systems are fabricated using conventional methods, then the systems provide reduced carbon emissions and improved energy efficiency, but the capital costs are high making them less competitive with conventional coal fired furnace systems
Solution Approach 1:
The direct reduction system is divided into multiple modular units that can be independently fabricated and assembled. Each module contains complete functional components (reformer, furnace, heat recovery system) that can be manufactured separately and then integrated at the installation site, reducing overall capital costs while maintaining the low carbon emission benefits of the direct reduction process
Solution Approach 2:
The modular design creates universal components that can be used across multiple direct reduction systems. The standardized modules can be deployed in various configurations and locations, reducing fabrication costs through economies of scale and making the technology more competitive with conventional systems
2Use of energy by moving object
If direct reduction systems are fabricated using conventional methods, then the systems provide improved energy efficiency, but the capital costs are high making assembly complex and time-consuming
Solution Approach 1:
The system is segmented into self-contained modular units that are pre-assembled and tested before final installation. This reduces on-site assembly complexity while preserving the energy efficient operation of the complete system, as each module is designed to function independently with standardized connection points
Solution Approach 2:
Modular components are pre-fabricated, pre-assembled, and pre-tested at manufacturing facilities before being transported to the installation site. This preliminary preparation reduces the complexity and time required for final assembly while ensuring the energy efficiency characteristics are maintained through factory-controlled manufacturing processes
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 modular approach reduces capital costs by allowing off-site fabrication and reuse of modules, making direct reduction systems more competitive with conventional systems in terms of capital expenditure while maintaining environmental and energy efficiency benefits.
Implementation Method 1
a reactor tube extending through the internal chamber of the reformer vessel and containing a catalyst configured to react with the feed gas received by the reactor tube to form the reducing gas
Implementation Method 2
a burner which receives a flow of fuel gas along a fuel gas flowpath and is configured to burn the fuel gas to heat the reactor tube
Implementation Method 3
a furnace having a first inlet which receives an iron ore, a second inlet which receives the reducing gas from the reformer system to react with the iron ore and form the DRI
Implementation Method 4
a heat recovery system which receives a flow of raw feed gas along a raw feed gas flowpath and which discharges a flow of the pre-heated feed gas along the pre-heated feed gas flowpath
Data Source
AI summary
A modular direct reduction system for producing direct reduced iron (DRI) includes a reformer system which receives a flow of feed gas and which discharges a flow of reducing gas, the reformer system including a plurality of separate reformer modules connected together and wherein each reformer module includes a reformer vessel including an internal chamber, a reactor tube extending through the internal chamber of the reformer vessel and containing a catalyst configured to react with the feed gas received by the reactor tube to form the reducing gas, and a burner to burn a fuel gas to heat the reactor tube, and a furnace system connected to the reformer system and including a furnace having a first inlet which receives an iron ore, a second inlet which receives the reducing gas from the reformer system to form the DRI, and an outlet which discharges the DRI.