Use of manganese compounds to improve the efficiency of and reduce back-corona discharge on electrostatic precipitators

A method of improving the efficiency of an electrostatic precipitator used to collect fly ash from a combustion exhaust gas resulting from the combustion of a fuel in a combustion unit, the method comprising adding to a combustion exhaust gas an amount of a source of manganese effective to improve the efficiency of the electrostatic precipitator, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

A method of reducing back-corona discharge in an electrostatic precipitator used to collect fly ash from a combustion exhaust gas resulting from the combustion of a fuel in a combustion unit, the method comprising adding to a fuel an amount of a source of manganese effective to reduce back-corona discharge in an electrostatic precipitator, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

A method of reducing back-corona discharge in an electrostatic precipitator used to collect fly ash from a combustion exhaust gas resulting from the combustion of a fuel in a combustion unit, the method comprising adding to a combustion exhaust gas an amount of a source of manganese effective to reduce back-corona discharge in an electrostatic precipitator, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

A fuel that is adapted to be combusted in a combustion unit to result in a combustion exhaust gas, said fuel comprising an amount of a source of manganese effective to improve the efficiency of an electrostatic precipitator used to collect fly ash from a resulting combustion exhaust gas, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

An additive for a fuel to be combusted in a combustion unit to result in a combustion exhaust gas, said fuel additive comprising an amount of a source of manganese effective to improve the efficiency of an electrostatic precipitator used to collect fly ash from the combustion exhaust gas, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

An additive that is adapted to be injected into the combustion exhaust gas resulting from the combustion of a fuel in a combustion unit, said additive comprising an amount of a source of manganese effective to improve the efficiency of an electrostatic precipitator used to collect fly ash from the combustion exhaust gas, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

A fuel that is adapted to be combusted in a combustion unit to result in a combustion exhaust gas, said fuel comprising an amount of a source of manganese effective to reduce back-corona discharge in an electrostatic precipitator used to collect fly ash from the combustion exhaust gas, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

An additive for a fuel to be combusted in a combustion unit to result in a combustion exhaust gas, said fuel additive comprising an amount of a source of manganese effective to reduce back-corona discharge in an electrostatic precipitator used to collect fly ash from the combustion exhaust gas, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

An additive that is adapted to be injected into the combustion exhaust gas resulting from the combustion of a fuel in a combustion unit, said additive comprising an amount of a source of manganese effective to reduce back-corona discharge in an electrostatic precipitator used to collect fly ash from the combustion exhaust gas, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

A method of improving the efficiency of an electrostatic precipitator used to collect fly ash from a combustion exhaust gas resulting from the combustion of a fuel and combustion air in a combustion unit, the method comprising adding to the combustion air an amount of a source of manganese effective to improve the efficiency of an electrostatic precipitator, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

A method of reducing back-corona discharge in an electrostatic precipitator used to collect fly ash from a combustion exhaust gas resulting from the combustion of a fuel and combination air in a combustion unit, the method comprising adding to the combustion air an amount of a source of manganese effective to reduce back-corona discharge in an electrostatic precipitator, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

A method of improving the efficiency of an electrostatic precipitator used to collect fly ash from a combustion exhaust gas resulting from the combustion of a fuel in a combustion unit, the method comprising:

• adding to a fuel an amount of a source of manganese effective to reduce back-corona discharge in an electrostatic precipitator;
• and
• increasing the voltage in the electrostatic precipitator to a voltage higher than a highest efficient voltage available when combusting a fuel that does not contain the amount of a source of manganese, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

A method of improving the efficiency of an electrostatic precipitator used to collect fly ash from a combustion exhaust gas from a combustion exhaust gas resulting from the combustion of a fuel in a combustion unit, the method comprising:

• adding to a combustion exhaust gas an amount of a source of manganese effective to reduce back-corona discharge in an electrostatic precipitator;
• and
• increasing the voltage in the electrostatic precipitator to a voltage higher than a highest efficient voltage available when collecting fly ash from a combustion exhaust gas that does not contain the amount of a source of manganese, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

A method of improving the efficiency of an electrostatic precipitator used to collect fly ash from a combustion exhaust gas resulting from the combustion of a fuel and combustion air in a combustion unit, the method comprising:

• adding to a combustion air an amount of a source of manganese effective to reduce back-corona discharge in an electrostatic precipitator;
• and
• increasing the voltage in the electrostatic precipitator to a voltage higher than a highest efficient voltage available when combusting a combustion air that does not contain the amount of a source of manganese, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

A method to increase power generation efficiency at a power plant that has an electrostatic precipitator used to collect fly ash from a combustion exhaust gas resulting from the combustion of a fuel and combustion air in a combustion unit, the method comprising adding to a fuel an amount of a source of manganese effective to improve the power generation efficiency of a power plant, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

A method to increase power generation efficiency at a power plant that has an electrostatic precipitator used to collect fly ash from a combustion exhaust gas resulting from the combustion of a fuel and combustion air in a combustion unit, the method comprising adding to combustion air an amount of a source of manganese effective to improve the power generation efficiency of a power plant, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.

A method to increase power generation efficiency at a power plant that has an electrostatic precipitator used to collect fly ash from a combustion exhaust gas resulting from the combustion of a fuel and combustion air in a combustion unit, the method comprising adding to combustion exhaust gas an amount of a source of manganese effective to improve the power generation efficiency of a power plant, said effective amount of manganese being between about 2 and 200 ppm wt/wt percent manganese in the fuel and between about 0.5 and 3 wt % manganese relative to the weight of the fly ash.