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[Glass] Green Process for the Environmental Protection Energy Island in Glass Kilns
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Tag list： [Glass] Green Process for the Environmental Protection Energy Island in Glass Kilns
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Product Description
INTERMET
Integrated Green Process for Desulfurization, Dust Removal, and Denitrification of Glass Furnace Flue Gas
The glass manufacturing industry is characterized by severe high-temperature operating conditions (flue gas temperatures typically range from 450 to 550°C), with complex flue gas composition that includes acidic gases, alkali metal vapors, and fine particulate matter. Traditional flue gas treatment technologies, particularly those employing ceramic filter elements, often encounter challenges in practical applications. “Prone to brittle fracture, high resistance, difficult maintenance, and high hazardous-waste disposal costs” address these pain points. Once a ceramic filter element fractures, not only does it result in dust emissions exceeding regulatory limits, but the furnace must also be shut down for large-scale replacement; moreover, the service life of the integrated catalyst is out of sync with that of the filter element, keeping operating costs persistently high. The YT metal filter bag process, on the other hand, Outstanding thermal resistance, mechanical strength, and flexible integration design , providing a more economical and reliable new option for flue-gas treatment in glass furnaces.
Project Overview
This solution is specifically designed for the high-temperature flue-gas environment of glass furnaces, with its core innovation being the use of metal-membrane filter bags to replace traditional ceramic filter elements. The process adopts a synergistic “dust removal + denitrification” configuration, featuring a standalone SCR catalyst layer installed downstream of the dust collector. Not only does this solution perfectly match the high-temperature operating conditions of glass furnaces, but it also addresses longstanding challenges in conventional processes—such as the easy breakage of filter elements, high system resistance, and asynchronous catalyst replacement—making it an ideal solution that balances high-efficiency purification with economic viability.
Solution Advantages
- Seismic-resistant and durable, eliminating the risk of pipe rupture: Compared with the one-in-a-thousand failure rate of ceramic filter elements, metal filter bags feature a metal skeleton structure that delivers high mechanical strength and excellent thermal-shock resistance, completely eliminating dust exceedances and production shutdowns caused by brittle fracture.
- Low-resistance energy saving, lower operating costs: The metal filter bags have a wall thickness of only 0.4–0.6 mm, with a thin residual cake layer on the surface, resulting in low filtration resistance (system resistance of only 1,500 Pa, compared with 2,000 Pa for ceramic filters) and a substantial reduction in fan energy consumption.
- Easy maintenance and asset recoverability: Metal filter bags have a service life of up to five years—outperforming ceramic filters, which last three years—and are recyclable, eliminating the need for hazardous-waste disposal. This thoroughly resolves the challenge of managing ceramic filter elements as hazardous waste after they reach the end of their service life.
- System integration for more efficient land use: Compared with ceramic processes, the YT process features a smaller plant footprint and significantly reduced land use, making it well suited for technology upgrade projects in space-constrained settings.
Technological Innovation Points
- Precision metal membrane filtration technology: With a filtration accuracy as high as 0.1 μm—superior to the 0.3 μm of conventional ceramic filter elements—the outlet dust concentration is stably maintained below 5 mg/Nm³, achieving truly ultra-low emissions.
- Decoupled Design for Dust Removal and Denitrification: Innovatively, the SCR catalyst is installed separately at the downstream end of the dust collector, rather than being integrated with the filter elements as in ceramic-based systems. This design decouples dust removal and denitrification service lives: the catalyst can be replaced independently (with a service life of ≥3 years), thereby eliminating the substantial waste associated with the mandatory complete replacement of the entire system when the filter elements fail in ceramic-based processes.
- High-temperature adaptability: The filter media withstands temperatures up to 450°C (with brief exposure to 500°C), fully meeting the high-temperature flue gas conditions in glass furnaces, eliminating the need for complex cooling pre-treatment and resulting in higher system thermal efficiency.
【Application Case】
This solution has been successfully implemented at several large glass manufacturers, demonstrating its outstanding performance:
Fengbo High-Temperature Dust, Nitrogen, and Sulfur Integrated Project:
Operating data: flue gas flow rate of 180,000 Nm³/h, flue gas temperature of 450–550°C.
Emission Results: Outlet dust concentration is only 7.9 mg/Nm³, and nitrogen oxide concentration is 31.1 mg/Nm³, both significantly better than the national standards.
Chengdu Taibo and Qiyang Glass Projects:
All systems are now operating stably, successfully resolving the previous issues of high resistance and frequent clogging in ceramic processing, and have earned high praise from customers.
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