Start-up of carbon black process
AssigneePhillips Petroleum Company
InventorsPaul J. Cheng, King L. Mills
Life of this patent
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Abstract
A start-up technique for a carbon black production process, in which carbon black laden effluent smoke from a carbon black furnace is quenched to terminate the reaction and cool said smoke and said smoke is thereafter cooled, at least in part, by indirect heat exchange with water, in which the smoke is initially quenched with a quench fluid to a temperature substantially below a predetermined temperature of introduction into the heat exchange step and the magnitude of the quenching is reduced over an extended period of time until the smoke is being quenched into a temperature substantially equal to the predetermined temperature.
Claims14
A method for starting-up a carbon black production process, in which smoke produced by a carbon black furnace is quenched to terminate the reaction and is thereafter cooled, at least in part, by indirect heat exchange with water, comprising:
- (a) initially quenching said smoke with a quench fluid to a temperature substantially below a predetermined temperature of introduction into said heat exchange step said predetermined temperature being between about 1800.degree. F. and about 2000.degree. F.;
- and
- (b) reducing the magnitude of said quenching over an extended period of time until said smoke is being quenched to a temperature substantially equal to said predetermined temperature whereby the heat transfer coefficient of said smoke is improved.
A method in accordance with claim 10 or 11 wherein the magnitude of the quenching is reduced at a rate to permit the temperature of the smoke to increase at a rate of about 200.degree./Hr. to about 2000.degree. F./Hr. until the predetermined temperature is reached.
Dependencies are inferred from the claim text.