Process for improving the effect of limestone-gypsum method for removing ultra-high sulfur flue gas
By improving the slurry formulation and zone control of the limestone-gypsum process, and combining it with a crystallization modifier, the problems of low desulfurizing agent utilization and poor gypsum quality in ultra-high sulfur flue gas desulfurization were solved, achieving efficient and low-cost desulfurization and gypsum resource utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 铜陵有色金属集团股份有限公司
- Filing Date
- 2026-05-21
- Publication Date
- 2026-07-17
AI Technical Summary
The limestone-gypsum method for treating ultra-high sulfur flue gas suffers from problems such as low desulfurization agent utilization, easy scaling and clogging of the system, and poor gypsum quality, making it difficult to meet the requirements of efficient desulfurization and resource utilization.
By adjusting the limestone slurry formula, controlling the pH value and the amount of oxidizing air in different zones, and combining sodium citrate and sodium polyacrylate as crystallization modifiers, the gypsum crystal morphology is optimized, and solid-liquid separation is carried out in a vacuum belt dewatering machine to improve the utilization rate of limestone slurry and the quality of gypsum.
It achieves high desulfurization efficiency (≥99%), stable SO2 concentration at the outlet, high gypsum purity (≥93%), and low moisture content (≤12%), thereby reducing operating costs and equipment wear and extending maintenance cycles.