Methods and apparatuses for removing mercury-containing material from emissions of combustion devices, and flue gas and flyash resulting therefrom
First Claim
1. A method of removing mercury or mercury-containing material from flue gas produced by a coal-burning main furnace, the method comprising:
- feeding coal which contains mercury or mercury-containing material to a main furnace which produces flue gas;
feeding the coal to an auxiliary burner which produces a slipstream of flyash,feeding the slipstream of flyash from the auxiliary burner into the flue gas produced by the main furnace; and
introducing a mercury-active oxidant to at least one of the coal being fed to the auxiliary burner, the combustion air being fed to the auxiliary burner, and the flyash, and wherein the mercury-active oxidant comprises a manganese compound selected from the group consisting of methyl cyclopentadienyl manganese tricarbonyl, manganese sulfonate, manganese phenate, manganese salicylate, cyclopentadienyl manganese tricarbonyl, alkyl cyclopentadienyl manganese tricarbonyl, organic manganese tricarbonyl derivatives, alkyl cyclopentadienyl manganese derivatives, bis-cyclopentadienyl manganese, bis-alkyl cyclopentandienyl manganese, neutral and overbased manganese salicylates, neutral and overbased manganese phenates, neutral and overbased manganese sulfonates, manganese carboxylates, and combinations and mixtures thereof.
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Accused Products
Abstract
A method of removing mercury or mercury-containing material from flue gas produced by a coal-burning main furnace includes feeding coal, which contains mercury or mercury-containing material, to a main furnace which produces flue gas. The method further includes feeding the coal to an auxiliary burner which produces a slipstream of flyash, feeding the slipstream of flyash from the auxiliary burner into the flue gas produced by the main furnace, and introducing a mercury-active oxidant to the coal being fed to the auxiliary burner, the combustion air fed to the auxiliary burner, and/or the flyash.
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Citations
17 Claims
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1. A method of removing mercury or mercury-containing material from flue gas produced by a coal-burning main furnace, the method comprising:
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feeding coal which contains mercury or mercury-containing material to a main furnace which produces flue gas; feeding the coal to an auxiliary burner which produces a slipstream of flyash, feeding the slipstream of flyash from the auxiliary burner into the flue gas produced by the main furnace; and introducing a mercury-active oxidant to at least one of the coal being fed to the auxiliary burner, the combustion air being fed to the auxiliary burner, and the flyash, and wherein the mercury-active oxidant comprises a manganese compound selected from the group consisting of methyl cyclopentadienyl manganese tricarbonyl, manganese sulfonate, manganese phenate, manganese salicylate, cyclopentadienyl manganese tricarbonyl, alkyl cyclopentadienyl manganese tricarbonyl, organic manganese tricarbonyl derivatives, alkyl cyclopentadienyl manganese derivatives, bis-cyclopentadienyl manganese, bis-alkyl cyclopentandienyl manganese, neutral and overbased manganese salicylates, neutral and overbased manganese phenates, neutral and overbased manganese sulfonates, manganese carboxylates, and combinations and mixtures thereof. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for removing mercury or mercury-containing material from flue gas produced by a coal-burning main furnace, comprising:
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a supply of coal which contains mercury or mercury-containing material; a coal-burning main furnace configured to receive coal from the supply of coal and to produce flue gas from combustion of the coal; an auxiliary burner configured to receive coal from the supply of coal, generate flyash, and direct the flyash to the flue gas of the main furnace; a treatment device configured to introduce a mercury-active oxidant into at least one of the coal being fed to the auxiliary burner, the combustion air being fed to the auxiliary burner, and the flyash, wherein the mercury-active oxidant comprises a manganese compound selected from the group consisting of methyl cyclopentadienyl manganese tricarbonyl, manganese sulfonate, manganese phenate, manganese salicylate, cyclopentadienyl manganese tricarbonyl, alkyl cyclopentadienyl manganese tricarbonyl, organic manganese tricarbonyl derivatives, alkyl cyclopentadienyl manganese derivatives, bis-cyclopentadienyl manganese, bis-alkyl cyclopentandienyl manganese, neutral and overbased manganese salicylates, neutral and overbased manganese phenates, neutral and overbased manganese sulfonates, manganese carboxylates, and combinations and mixtures thereof. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of removing mercury or mercury-containing material from flue gas produced by a coal-burning main furnace, the method comprising:
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feeding coal to an auxiliary burner which produces a slipstream of flyash; generating a slipstream of flyash from the auxiliary burner; feeding the slipstream of flyash into flue gas produced by the main furnace; and introducing a mercury-active oxidant into at least one of the coal being fed to the auxiliary burner, the combustion air being fed to the auxiliary burner, and the flyash, and wherein the mercury-active oxidant comprises a manganese compound selected from the group consisting of methyl cyclopentadienyl manganese tricarbonyl, manganese sulfonate, manganese phenate, manganese salicylate, cyclopentadienyl manganese tricarbonyl, alkyl cyclopentadienyl manganese tricarbonyl, organic manganese tricarbonyl derivatives, alkyl cyclopentadienyl manganese derivatives, bis-cyclopentadienyl manganese, bis-alkyl cyclopentandienyl manganese, neutral and overbased manganese salicylates, neutral and overbased manganese phenates, neutral and overbased manganese sulfonates, manganese carboxylates, and combinations and mixtures thereof. - View Dependent Claims (14, 15, 16, 17)
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Specification