Method for converting lime-based wet flue gas desulfurization systems to limestone-based systems

A method for converting an existing lime-based SO2 scrubbing process for utility or industrial boilers into limestone-based inhibited oxidation SO2 scrubbing process, comprising:

• adding a limestone grinding system to an existing lime-based SO2 scrubbing system;
• grinding limestone in the limestone grinding system;
• depositing ground limestone from the limestone grinding system into slurry;
• and
• pumping the slurry into a flue gas desulfurization reaction vessel, further including addition of an organic acid to remove SO2 from flue gas.

A method for converting an existing lime-based SO2 scrubbing process for utility or industrial boilers into limestone-based inhibited oxidation SO2 scrubbing process, comprising:

• adding a limestone grinding system to an existing lime-based SO2 scrubbing system;
• grinding limestone in the limestone grinding system;
• depositing ground limestone from the limestone grinding system into slurry;
• and
• pumping the slurry into a flue gas desulfurization reaction vessel, further including addition of an organic acid selected from the group consisting of formic, acetic, glycolic, maleic, lactic, adipic, succinic and glutaric, to remove SO2 from flue gas.

A method for converting an existing lime-based SO2 scrubbing process for utility or industrial boilers into a limestone-based inhibited oxidation SO2 scrubbing process, comprising:

• adding a limestone grinding system to an existing lime-based SO2 scrubbing system;
• grinding limestone in the limestone grinding system;
• depositing ground limestone from the limestone grinding system into slurry;
• and
• pumping the slurry into a flue gas desulfurization reaction vessel, further including addition of an organic acid selected from the group consisting of a salt of one or more of formic, acetic, glycolic, maleic, lactic, adipic, succinic and glutaric to remove SO2 from flue gas.

A method for converting an existing lime-based SO2 scrubbing process for utility or industrial boilers into a limestone-based inhibited oxidation SO2 scrubbing process, comprising:

• adding a limestone grinding system to an existing lime-based SO2 scrubbing system;
• grinding limestone in the limestone grinding system;
• depositing ground limestone from the limestone grinding system into slurry;
• and
• pumping the slurry into a flue gas desulfurization reaction vessel, further including addition of an adibasic organic acid selected from the group consisting of adipic, malaeic, succinic and glutaric or an analog thereof to remove SO2 from flue gas.

A method for converting an existing lime-based SO2 scrubbing process for utility or industrial boilers into a limestone-based inhibited oxidation SO2 scrubbing process, comprising:

• adding a limestone grinding system to an existing lime-based SO2 scrubbing system;
• grinding limestone in the limestone grinding system;
• depositing ground limestone from the limestone grinding system into slurry;
• and
• pumping the slurry into a flue gas desulfurization reaction vessel, further including addition of an organic acid to remove SO2 from flue gas, wherein the organic acid is a compound based on glycolic acid, or any analog thereof.

A method for converting an existing lime-based SO2 scrubbing process for utility or industrial boilers into limestone-based inhibited oxidation SO2 scrubbing process, comprising:

• adding a limestone grinding system to an existing lime-based SO2 scrubbing system;
• grinding limestone in the limestone grinding system;
• depositing ground limestone from the limestone grinding system into slurry;
• and
• pumping the slurry into a flue gas desulfurization reaction vessel, further including addition of an oxidation inhibitor.

A method for converting an existing lime-based SO2 scrubbing process for utility or industrial boilers into limestone-based inhibited oxidation SO2 scrubbing process, comprising:

• adding a limestone grinding system to an existing lime-based SO2 scrubbing system;
• grinding limestone in the limestone grinding system;
• depositing ground limestone from the limestone grinding system into slurry;
• and
• pumping the slurry into a flue gas desulfurization reaction vessel, further including addition of an oxidation inhibitor, wherein the oxidation inhibitor is one or more of sodium thiosulfate, emulsified sulfur or soluble iodide salts.

A method for converting an existing lime-based SO2 scrubbing process for utility or industrial boilers into limestone-based forced oxidation SO2 scrubbing process, comprising:

• adding a limestone grinding system to an existing lime-based SO2 scrubbing system;
• grinding limestone in the limestone grinding system;
• depositing the ground limestone into a slurry;
• and
• pumping the slurry into a flue gas desulfurization reaction vessel, wherein the limestone grinding system is located downstream from an existing slaking unit which pre-crushes the limestone prior to entering the limestone grinding system.

A method for converting an existing lime-based SO2 scrubbing process for utility or industrial boilers into limestone-based forced oxidation SO2 scrubbing process, comprising:

• adding a limestone grinding system to an existing lime-based SO2 scrubbing system;
• grinding limestone in the limestone grinding system;
• depositing the ground limestone into a slurry;
• and
• pumping the slurry into a flue gas desulfurization reaction vessel, further including addition of an organic acid to remove SO2 from flue gas.