Method of binding sulfur compounds by adding additives

Claim 1

A method of binding sulfur oxide compounds which are produced as reaction products during the combustion of sulfur-containing fuels in a charging bed or fluidized bed furnace at temperatures above 1000° C. that have adverse effects on reaction temperature as well as upon operation of the furnace resulting in formatio of slag on surfaces of the furnace, said method including the step of adding additives to the flue gases coming from said furnace; the method comprising the steps of: passing the hot flue gases as they exit directly from said charging bed or fluidized bed furnace so that the hot flue gases first go through a cooling zone wherein the hot flue gases themselves are cooled to lower the temperature of said flue gases to a value of temperature that is below 1000° C. and that is aimed at an optimum reaction temperature to effect the binding of sulfur oxide compounds in accordance with the additives to be employed, the cooling zone for the flue gas directly after leaving the furnace representing a feature arranged prior to actual flue-gas-waste-heat utilization; only thereafter introducing said additives into said cooled-off flue gases via a carrier medium at a location at which conditions are maintained that avoid the adverse effects on reaction temperature as well as upon operation of the furnace resulting in formation of salg on surfaces of the furnace; and using additives selected from the group consisting of oxides and hydroxides of metals selected from the group consisting of sodium, potassium, aluminum, barium, cadmium, calcium, copper, iron, lead, magnesium, manganese, and zinc.

Claim 2

A method of binding sulfur oxide compounds which are produced as reaction products during the combustion of sulfur-containing fuels in a charging bed or fluidized bed furnace at temperatures above 1000° C. that have adverse effects on reaction temperature as well as upon operation of the furnace resulting in formatio of slag on surfaces of the furnace, said method including the step of adding additives to the flue gases coming from said furnace; the method comprising the steps of: passing the hot flue gases as they exit directly from said charging bed or fluidized bed furnace so that the hot flue gases first go through a cooling zone wherein the hot flue gases themselves are cooled to lower the temperature of said flue gases to a value of temperature that is below 1000° C. and that is aimed at an optimum reaction temperature to effect the binding of sulfur oxide compounds in accordance with the additives to be employed, the cooling zone for the flue gas directly after leaving the furnace representing a feature arranged prior to actual flue-gas-waste-heat utilization; only thereafter introducing said additives into said cooled-off flue gases via a carrier medium at a location at which conditions are maintained that avoid the adverse effects on reaction temperature as well as upon operation of the furnace resulting in formation of salg on surfaces of the furnace; and using additives selected from the group consisting of oxides and hydroxides of metals selected from the group consisting of sodium, potassium, aluminum, barium, cadmium, calcium, copper, iron, lead, magnesium, manganese, and zinc.

Claim 7

A method of binding sulfur oxide compounds which are produced as reaction products during the combustion of sulfur-containing fuels in a chargin bed or fluidized bed furnace at temperatures above 1000° C. that have adverse effects of reaction temperature as well as upon operation of the furnace resulting in formation of slag on surfaces of the furnace, said method including the step of adding additives to the flue gases coming from said furnace; the method comprising the steps of: passing the hot flue gases as they exit directly from said charging bed or fluidized bed furnace so that the hot flue gases first go through a cooling zone wherein the hot flue gases themselves are cooled to lower the temperature of said flue gases to a value of temperature that is below 1000° C. and that is aimed at an optimum reaction temperature to effect the binding of sulfur oxide compounds in accordance with the additives to be employed, the cooling zone for the flue gas directly after leaving the furnace representing a feature arranged prior to actual flue-gas-waste-heat utilization; and then only thereafter introducing said additives into said cooled-off flue gases via a carrier medium at a location at which conditions are maintained that avoid the adverse effects on reaction temperature as well as upon operation of the furnace resulting in formation of slag on surfaces of the furnace; and using additives in pulverous form selected from the group consisting of calcium carbonate, magnesium carbonate, and dolomite.

Claim 8

A method of binding sulfur oxide compounds which are produced as reaction products during the combustion of sulfur-containing fuels in a chargin bed or fluidized bed furnace at temperatures above 1000° C. that have adverse effects of reaction temperature as well as upon operation of the furnace resulting in formation of slag on surfaces of the furnace, said method including the step of adding additives to the flue gases coming from said furnace; the method comprising the steps of: passing the hot flue gases as they exit directly from said charging bed or fluidized bed furnace so that the hot flue gases first go through a cooling zone wherein the hot flue gases themselves are cooled to lower the temperature of said flue gases to a value of temperature that is below 1000° C. and that is aimed at an optimum reaction temperature to effect the binding of sulfur oxide compounds in accordance with the additives to be employed, the cooling zone for the flue gas directly after leaving the furnace representing a feature arranged prior to actual flue-gas-waste-heat utilization; and then only thereafter introducing said additives into said cooled-off flue gases via a carrier medium at a location at which conditions are maintained that avoid the adverse effects on reaction temperature as well as upon operation of the furnace resulting in formation of slag on surfaces of the furnace; and using additives in pulverous form selected from the group consisting of calcium carbonate, magnesium carbonate, and dolomite.