Removal of mercury emissions

US9321002B2 · kind B2 · utility

Assignee

• ALSTOM Technology Ltd · CH

Inventors

• Richard C. LaFlesh · Suffield, US
• John Iovino · Simsbury, US
• Shin G. Kang · Simsbury, US
• Carl D. Edberg · Stafford Springs, US
• Raymond W. Cournoyer · Enfield, US

Key dates

• Filing date: Jul 19, 2012
• Grant date: Apr 26, 2016
• Expiry date: Mar 14, 2033

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23J2219/30
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A system for removing gaseous pollutants, such as mercury from flue gases of a solid-fueled furnace (17), includes a sorbent mill (34) that receives superheated steam and a sorbent (28), such as activated carbon, in a partially agglomerated state, that processes the sorbent (28) by de-agglomerating and comminuting the sorbent (28). An educator (35) transports the processed sorbent (28) to a distributor (36) that injects it into the flue gases at a contact location having a temperature between 500° F. and 900° F., whereupon the sorbent (28) adsorbs mercury from the flue gas. A particle collection device (24) removes the processed sorbent (28) having adsorbed mercury, from the flue gas.