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1. (WO2017197049) SULFITE PRECONDITIONING SYSTEMS AND METHODS TO REDUCE MERCURY CONCENTRATIONS IN WASTE WATER

Pub. No.:    WO/2017/197049    International Application No.:    PCT/US2017/032044
Publication Date: Fri Nov 17 00:59:59 CET 2017 International Filing Date: Thu May 11 01:59:59 CEST 2017
IPC: C02F 1/74
C02F 1/00
B01D 53/50
B01D 53/64
B01D 53/80
B01D 53/34
C02F 1/52
C02F 1/66
C02F 5/06
C02F 101/10
C02F 101/20
C02F 103/18
Applicants: GENERAL ELECTRIC COMPANY
Inventors: GANSLEY, Raymond, Raulfs
DALE, Trevor, James
Title: SULFITE PRECONDITIONING SYSTEMS AND METHODS TO REDUCE MERCURY CONCENTRATIONS IN WASTE WATER
Abstract:
The present application provides a waste water preconditioning system for limiting mercury concentrations in a waste water stream resulting from treatment of a flue gas. The waste water preconditioning system may include a wet flue gas desulfurization system for treating the flue gas with an aqueous alkaline slurry, a sulfite detector to determine the concentration of sulfite in the aqueous alkaline slurry, and to produce the waste water stream with a mercury concentration of less than about five micrograms per liter. The waste water preconditioning system also may include a waste water treatment system downstream of the wet flue gas desulfurization system.