REMOVAL OF GASEOUS MERCURY IN WET EXHAUST GAS SCRUBBING EQUIPMENT

REMOVAL OF GASEOUS MERCURY IN WET EXHAUST GAS SCRUBBING EQUIPMENT

PURPOSE:To remove gaseous mercury in exhaust gas along with HCl and SOx with high efficiency, by scrubbing exhaust gas with an alkali solution to which thiourea and cuprous chloride are added. CONSTITUTION:Caustic soda 5, to which thiourea 2 and cuprous chloride 3 are added, is supplied to a gas scr...

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Bibliographische Detailangaben
Hauptverfasser: KAKETA KENJI, OBATA HIROICHI
Format: Patent
Sprache:eng
Schlagworte:
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Zusammenfassung:PURPOSE:To remove gaseous mercury in exhaust gas along with HCl and SOx with high efficiency, by scrubbing exhaust gas with an alkali solution to which thiourea and cuprous chloride are added. CONSTITUTION:Caustic soda 5, to which thiourea 2 and cuprous chloride 3 are added, is supplied to a gas scrubbing tower 13 while the exhaust gas 6 of a garbage incinerator is guided to said scrubbing tower 13 to be scrubbed with caustic sode 5. HCl and SOx in the exhaust gas are removed and, at the same time, 90% or more of gaseous mercury is removed. Purified exhaust gas is exhausted through a re-heater 25 while mixed with heated air 19.