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US 2016/0102253 A1Published application
Delayed coker feed heater on-line steam-chemical decoking method
AssigneeSbt Technology, Inc.
InventorVasant Lotu Bhirud
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Abstract
A process for decoking of delayed coker feed heater pass is disclosed. A chemical mixture containing a metal hydroxide and a metal carbonate is combined with steam to decoke the delayed coker feed heater pass.
Claims13
A process for decoking a delayed coker feed heater comprising the steps of:
- (a) supplying a mixture of steam and predetermined chemical amount at pre-calculated radiant coil outlet temperature by controlling heater 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 heater de-coking is complete.
1 more element
A method of decoking a delayed coker feed heater , comprising the steps of:
- maintaining a temperature suitable for allowing the gasification of coke;
- contacting the heater with steam and a mixture of a metal hydroxide and a metal carbonate;
- and
- decreasing the flow of steam and while maintaining radiant coil temperature and chemical injection rate.
1 more element
Dependencies are inferred from the claim text.