Ethylene Furnace Decoking Method
AssigneeSbt Technology, Inc.
InventorVasant Lotu Bhirud
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Abstract
A method for decoking radiant coils and quench exchangers in ethylene furnaces is disclosed. A chemical mixture containing a metal hydroxide and a metal carbonate is combined with steam to decoke an ethylene furnace.
Claims17
A process for decoking an ethylene furnace, comprising the steps of:
- (a) supplying a mixture of steam and predetermined chemical amount at pre-calculated radiant coil outlet temperature by controlling furnace firing;
- (b) decreasing the flow of steam and while maintaining radiant coil temperature and chemical injection rate;
- and
- (c) further decreasing the flow of steam while maintaining radiant coil temperature and chemical injection rate until furnace de-coking is complete.
A method of decoking an ethylene furnace which is used for the cracking of a hydrocarbon, comprising the steps of:
- maintaining a temperature suitable for allowing the gasification of coke;
- and
- contacting the furnace with steam and a mixture of a metal hydroxide and a metal carbonate.
A method of treating an olefin furnace to alleviate the deposit of coke during the cracking of a hydrocarbon, comprising the step of injecting into the hydrocarbon a sufficient amount of a mixture of a metal hydroxide and a metal carbonate.
Dependencies are inferred from the claim text.