Combustion of halogenated hydrocarbons

Claim 1

A method for avoiding rapid corrosion of the combustion-tube, tube-sheets, and return-tubes of a water-cooled horizontal fire-tube boiler as a mixture of air, halogenated hydrocarbons, and optional supplemental fuel is burned therein in order to recover heat values and halogen values from said halogenated hydrocarbons, and where said fire-tube boiler contains corrosion resistant material on those inner surfaces which are in contact with the hot combustion gases but which are not directly cooled by water on their reverse sides, said method comprising, burning a mixture of air, halogenated hydrocarbon and optical supplemental fuel in the combustion chamber of a water-cooled horizontal fire-tube boiler which contains a combustion-tube and a plurality of return-tubes, removing saturated steam from the boiler in the pressure range of about 150 to about 275 psig, while adding water to the boiler at a rate sufficient to keep all the tubes submerged, thereby maintaining the water temperature in the boiler in the temperature range of about 186° C. to about 210° C., conveying the combustion gases through an aqueous scrubber to recover halogen values therefrom, and venting the resulting halogen-depleted gases from the system.

Claim 2

A method for avoiding rapid corrosion of the combustion-tube, tube-sheets, and return-tubes of a water-cooled horizontal fire-tube boiler as a mixture of air, halogenated hydrocarbons, and optional supplemental fuel is burned therein in order to recover heat values and halogen values from said halogenated hydrocarbons, and where said fire-tube boiler contains corrosion resistant material on those inner surfaces which are in contact with the hot combustion gases but which are not directly cooled by water on their reverse sides, said method comprising, burning a mixture of air, halogenated hydrocarbon and optical supplemental fuel in the combustion chamber of a water-cooled horizontal fire-tube boiler which contains a combustion-tube and a plurality of return-tubes, removing saturated steam from the boiler in the pressure range of about 150 to about 275 psig, while adding water to the boiler at a rate sufficient to keep all the tubes submerged, thereby maintaining the water temperature in the boiler in the temperature range of about 186° C. to about 210° C., conveying the combustion gases through an aqueous scrubber to recover halogen values therefrom, and venting the resulting halogen-depleted gases from the system.