A lithium-fluorite calcination rotary kiln tail gas purification system
By combining a multi-stage cyclone preheater, a high-temperature dust collector, an SCR denitrification device, and a dry deacidification agent, the problems of high investment, complex maintenance, and excessive dust emissions in the purification of flue gas from the tail gas of a spodumene roasting rotary kiln have been solved, achieving efficient SO2 removal and dust removal.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 浙江菲达环保科技股份有限公司
- Filing Date
- 2026-04-20
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for purifying flue gas from rotary kilns used for spodumene roasting suffer from high investment costs, high water consumption, complex operation and maintenance, and excessive dust emissions. In particular, the low-temperature liquid-phase denitrification efficiency is low and the semi-dry desulfurization efficiency is insufficient.
The system employs a combination of multi-stage cyclone preheaters, high-temperature dust collectors, reducing agent ammonia spray grids, SCR denitrification devices, waste heat boilers, dry desulfurization agent injection nozzles, and bag filters. It utilizes sodium bicarbonate as a desulfurization agent, eliminating the wet desulfurization process. Through dry desulfurization and SCR denitrification, combined with the separate design of the high-temperature dust collector and SCR denitrification, the denitrification efficiency is improved and dust emissions are reduced.
It achieves a high SO2 removal efficiency of over 95%, reduces investment and operating costs, decreases the need for ash recycling and wastewater treatment, improves the operating load of the dust collector, extends the filter bag life, and avoids excessive dust emissions.
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Abstract
Citation Information
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