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![[Steel] Green and Low-Carbon Process for Primary Flue Gas Purification and Recovery in the Converter](/npublic/img/s.png "[Steel] Green and Low-Carbon Process for Primary Flue Gas Purification and Recovery in the Converter")
[Steel] Green and Low-Carbon Process for Primary Flue Gas Purification and Recovery in the Converter
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Tag list： [Steel] Green and Low-Carbon Process for Primary Flue Gas Purification and Recovery in the Converter
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Product Description
INTERMET
Ultra-Low Emission and Energy-Saving, Consumption-Reducing Green Process for Converter Gas
In the field of converter flue-gas treatment, Yitai Technology leverages its independently developed YT metal-membrane core technology as the driving force to innovatively design three comprehensive system solutions tailored to the specific operating conditions and retrofit objectives of each client. We are committed to providing steelmakers with end-to-end, customized green transformation pathways that cover the entire process—from source-level control to final emission compliance.
Option 1: LT All-Dry Waste Heat Recovery and Purification Process —— Industry-leading green and low-carbon benchmark processes
Project Overview:
As a flagship solution leading the industry’s green transformation, Yitai Technology’s “All-Dry Waste Heat Recovery and Purification Process” has brought about a qualitative leap in converter flue-gas treatment. This solution not only ensures long-term, stable particulate emissions below 10 mg/Nm³, but also delivers substantial incremental economic benefits to customers through its all-dry processing approach. It is the preferred benchmark solution for steelmakers seeking to align with national low-carbon policies and maximize energy efficiency.
Core Innovation Points:
- Transformative Reconfiguration of the Process Flow: Innovatively eliminating the conventional evaporative cooler, the process adopts a fully dry flow scheme featuring a waste-heat boiler combined with a YT metal-membrane dust collector. This approach completely eliminates the spray-based cooling stage, thereby eliminating water resource wastage and achieving a fully dry and clean flue-gas treatment process from start to finish.
- Hierarchical and Efficient Energy Recovery: A cascaded waste-heat recovery system spanning high- to low-temperature ranges has been developed, maximizing the recovery of sensible heat from 1,600°C flue gas and seamlessly integrating environmental protection with energy conservation and efficiency enhancement, thereby addressing the longstanding issue of heat loss in conventional processes.
- Core Materials and Equipment Integration: Leveraging the high-temperature resistance, high flux, and high precision of YT metal membranes, we have successfully achieved deep coupling between a waste heat recovery unit and a high-efficiency dust removal system, thereby filling a critical gap in filter media technology for high-temperature dry-process environments.
Breakthroughs in Technical Challenges:
- Overcoming the challenge of coupled alternating operating conditions: Successfully mitigated the impact of the cyclical and fluctuating gas composition of converter off-gas on the heat recovery and dust removal systems, thereby ensuring the coordinated and stable operation of heat recovery and ultra-low emissions.
- Validate the technical reliability of the entire process: Long-term engineering practice has demonstrated that the YT metal-membrane dust-collection system exhibits exceptionally high safety and adaptability in all-dry processes, thereby breaking through longstanding technical bottlenecks in the industry.
Option 2: Metal-Membrane Dust Removal as a Replacement for the LT Electrostatic Precipitation Method —— Efficient, energy-saving, safe, and stable process upgrade solution
Project Overview ：
In response to the pain points of conventional LT electrostatic precipitators—high energy consumption, difficult maintenance, and safety hazards—Yitai Technology has launched a “metal-membrane dust removal solution as a replacement for LT electrostatic precipitation.” This solution replaces electric-field adsorption with physical filtration; the metal membrane boasts excellent conductivity, eliminating the risks of sparking and combustion. While ensuring ultra-low emissions throughout the entire process, it also delivers substantial annual savings in operating costs. As a technology characterized by high return on investment, low retrofit risk, and robust safety, it helps steel enterprises achieve green upgrades at low cost and high efficiency.
Core Innovation Points:
- Technological Route Substitution and Upgrade: Pioneeringly, the YT metal-membrane dust collector is directly substituted for the electrostatic precipitator (EP) in the conventional LT process, thereby simplifying the process flow, eliminating the secondary fine dust collection at the discharge end, and achieving “dual functionality in a single unit.”
- System-Level Intrinsic Safety Design: Leveraging the superior conductivity of YT metal films, combined with a dead-zone-free flow-field design, nitrogen purging for protection, and multi-stage explosion-proof devices, this solution completely eliminates the risk of static-electricity-induced ignition, thereby establishing a robust explosion-proof safety barrier.
- Revolutionary reduction in operating costs: By abandoning high-energy electrostatic dust-collection technology, power consumption is significantly reduced, and costly maintenance expenses for electrodes and electrode wires are eliminated, thereby establishing a “low-investment, low-operation” dual-low-benefit model.
Breakthroughs in Technical Challenges:
- Breaking Through the Safety Bottleneck in Flammable and Explosive Environments: Through multidimensional safety design integration, combustion and explosion risks are effectively mitigated, ensuring the system’s long-term intrinsic safety under complex and cyclical operating conditions.
- Achieve dual compatibility between new construction and renovation: This solution is applicable both to greenfield projects and to direct retrofitting of existing LT-process facilities, offering a short retrofit timeline, rapid return on investment, and a significantly lowered barrier to technology upgrades.
Option 3: Achieving Ultra-Low Emissions at the LT Method’s Exhaust Outlet —— Rapid compliance and stable, reliable end-of-pipe treatment solutions
Project Overview:
For steel enterprises that currently rely on the conventional LT process and are unable to undertake a comprehensive process upgrade in the short term, Yitai Technology offers a “Ultra-Low Emission Solution for the LT Process Exhaust Outlet.” As a proven, industry-standard solution already deployed at major steelmakers such as Shougang and Rizhao Iron & Steel, this process is highly flexible and delivers rapid results, ensuring that dust concentrations in converter gas emissions remain consistently below 10 mg/Nm³. It represents a cost-effective and reliable option for companies seeking to swiftly achieve environmental compliance and mitigate associated risks.
Core Innovation Points:
- End-of-line fine dust removal technology integration: Without altering the existing core structure of the LT process, an innovative YT metal-membrane fine dust-collection system has been added between the venting cup valve and the venting chimney, precisely addressing the longstanding issue of substandard emissions from electrostatic precipitators.
- Breakthrough in Adaptability to Complex Operating Conditions: Extensive engineering practice has demonstrated that the YT metal-membrane dust collector exhibits exceptional adaptability to fluctuating process conditions, such as variations in converter flue-gas temperature and dust concentration, thereby ensuring long-term, stable compliance with emission standards at the outlet.
Breakthroughs in Technical Challenges:
- Technical enhancements with no production downtime or minimal impact: Successfully implemented a “minimally invasive” retrofit on the existing production line, ensuring continuous operation of the main production line while achieving strict compliance with emission regulations.
- Long-term stability verification: Operational data from dozens of converter units demonstrate that the metal-membrane filter material delivers exceptionally long service life and stable filtration efficiency even under the harsh operating conditions at the venting end, thereby overcoming the longstanding challenge of frequent filter-media replacement.
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