Combined desulfuration, denitration, and demercuration apparatus and method using semi-dry process in circulating fluidized bed

US9656206B2 · kind B2 · utility

Assignees

• INSTITUTE OF PROCESS ENGINEERING, CHINESE ACADEMY OF SCIENCES · CN
• BEIJING ZSTC ENVIRONMENTAL ENGINEERING CO., LTD. · CN

Inventors

• Tingyu Zhu · Beijing, CN
• Wenqing Xu · Beijing, CN
• Meng Ye · Beijing, CN
• Ruizhuang Zhao · Beijing, CN

Key dates

• Filing date: Oct 23, 2013
• Grant date: May 23, 2017
• Expiry date: Nov 8, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A50/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A combined desulfuration, denitration, and demercuration apparatus and method using a semi-dry process in a circulating fluidized bed. The apparatus comprises a flue (2) and a circulating fluidized bed reaction column (8) connected in sequence, the flue (2) being connected to a bottom inlet of the circulating fluidized bed reaction column (8). The flue (2) is further connected to an ozone generation apparatus (1). The ozone distributor (1) feeds ozone in the flue (2) and sends oxidized flue gas into the circulating fluidized bed reaction column (8), so that the SO2, high-valence NOx, and Hg2+ contained in the flue gas are removed through reactions with a Ca-based absorbent under the effect of atomized water in the reaction column (8).