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[Waste-to-Energy] Green and Low-Carbon Process Package for Waste Incineration Power Generation with Zero Dioxin-Containing Fly Ash
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Tag list： [Waste-to-Energy] Green and Low-Carbon Process Package for Waste Incineration Power Generation with Zero Dioxin-Containing Fly Ash
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Product Description
INTERMET
YT High-Temperature Sulfur-Dust-Nitrogen Integrated Green Complete Set of Equipment
[Project Overview]
Addressing the challenges of complex flue-gas composition in waste incineration, the difficulty of dioxin control, and the high energy consumption of conventional processes, Chengdu Yitai Technology has launched the YT high-temperature integrated sulfur–dust–nitrogen green turnkey system. This solution adopts a proactive approach centered on “source reduction of dioxins,” utilizing Yitai’s proprietary high-temperature metal membrane (with a temperature resistance of up to 500°C) to perform pre-treatment dry desulfurization and high-temperature dust removal (350–400°C) before the flue gas enters the economizer. Combined with high-temperature SCR denitrification, this creates an all-dry flue-gas purification process. The process eliminates the need for secondary reheating of the flue gas, significantly reduces the overall footprint of the equipment, and achieves both highly efficient pollutant control and efficient energy utilization.
【Solution Advantages】
1. Source-based reduction of dioxins and substantial reduction in hazardous waste
- Source-control measures: By shifting from the conventional “passive” approach of activated-carbon adsorption, high-temperature dust removal is employed to eliminate the precursors and catalysts that give rise to dioxin formation, thereby significantly reducing dioxin generation.
- Fly Ash Resource Utilization: The dioxin content in fly ash separated at high temperatures is significantly lower than that in baghouse dust collected during the same period (as low as 0.012 µg TEQ/kg), meeting general solid-waste standards and thereby reducing hazardous-waste treatment costs and landfill space requirements.
2. Enhanced equipment protection and efficient waste heat recovery
- Economizer protection: A high-temperature dust removal stage is installed upstream, which prevents sulfur-containing flue gas particulates from eroding, wearing down, and causing condensation-induced corrosion of the economizer, thereby extending the equipment’s service life.
- Heat exchange enhancement: reduces flue gas temperature, decreases the fouling factor on heat transfer surfaces, and improves boiler thermal efficiency and waste heat recovery utilization.
3. Short process flow, energy saving, cost reduction, and efficiency enhancement
- Zero-energy denitrification: By leveraging the boiler’s natural temperature gradient, denitrification requires no additional energy input, eliminating the need for GGH and SGH, and thereby reducing both capital expenditure and operating costs.
- Long catalyst life: High-temperature dust removal upstream of the SCR system ensures that the catalyst operates in a low-dust environment, resulting in reduced catalyst dosage, high efficiency, and extended service life.
【Technological Innovation Points】
1. YT High-Temperature Metal Film Core Material
- High-temperature resistance: Can withstand temperatures up to 450°C (with instantaneous exposure to 500°C), and exhibits excellent oxidation and sulfidation corrosion resistance.
- High-precision filtration: Filtration accuracy reaches 0.1 μm, utilizing the Kirkendall effect for pore formation, resulting in a low tortuosity factor, low resistance, and high flux.
2. Dioxin Source Reduction Technologies
- Theoretical Validation: Pilot-scale trials have confirmed the “catalytic formation of dioxins from dust precursors” theory, demonstrating that high-temperature dust removal can effectively prevent the generation of this highly toxic substance at its source.
- High-efficiency adsorption: The downstream activated carbon adsorption system operates without dust generation and allows for cyclic adsorption, thereby enhancing the efficiency of adsorbent utilization.
3. Integrated Complete Set of Sulfur Dust and Nitrogen Oxide Treatment Equipment
- System Integration: Integrates waste heat recovery, desulfurization, dust removal, and denitrification into a single system, shortening the process flow and enabling a compact layout.
- Stable Operation: The design incorporates a built-in flue-gas diversion valve to accommodate furnace start-up and shutdown as well as fluctuations in flue-gas temperature, thereby ensuring stable operation at all times.
[Project Case]
Project Overview: Everbright Xiong’an New Area Integrated Waste Treatment Project
The project has a total integrated waste treatment capacity of 5,000 t/d and will be implemented in phases, with the first phase involving the construction of a municipal solid waste treatment line with a capacity of 3 × 750 t/d. The project employs a flue gas purification process comprising “in-furnace dry injection + SNCR + desuperheating tower + dry acid removal + activated carbon injection + baghouse dust collection + GGH + wet scrubber for dust and acid removal + GGH + SCR denitrification.”
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