Process for decoking a delayed coker
First Claim
1. A process for decoking at least one residual oil delayed coke reactor comprising:
- pumping water at high pressure through a flexible pipeline suspended vertically with respect to the reactor by channeling the water through a path passing axially through an axis of a hollow drive shaft of a reel around which the flexible pipeline is looped and then channeling the water radially of the drive shaft and into a first end of the flexible pipeline;
ejecting the water from a nozzle array connected to a second end of the flexible pipeline in a downward direction with respect to the axis of the reactor at a first pressure while unreeling the flexible pipeline from the reel to drill a hole through the coke in the coke reactor;
changing the water pressure from a first pressure to a second pressure; and
ejecting the water from the nozzle array in a lateral direction at the second pressure to cut and discharge coke lining the bore from the reactor while reeling the flexible pipeline on the reel.
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Accused Products
Abstract
The present invention relates to decoking of a residual oil delayed coke reactor. When decoking, the roller of the flexible pipe winch is rotated to cause the flexible pipe to vertically ascend or descend in the coker wherein the high pressure water rotates the turbine blades of the turbine-reductor which brings the drilling and cutting combination unit into rotation so as to drill a through hole in the coke accumulation and then conduct the decoking operation. The drilling and cutting combination unit is equipped with a pressure control unit so that switchover of the drilling and cutting operations can be automatically performed. The present invention eliminates the use of a derrick, resulting in significant savings in time, quantity of steel, capital investment, and equipment required to facilitate the decoking process and enhance decoking efficiency.
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Citations
11 Claims
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1. A process for decoking at least one residual oil delayed coke reactor comprising:
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pumping water at high pressure through a flexible pipeline suspended vertically with respect to the reactor by channeling the water through a path passing axially through an axis of a hollow drive shaft of a reel around which the flexible pipeline is looped and then channeling the water radially of the drive shaft and into a first end of the flexible pipeline; ejecting the water from a nozzle array connected to a second end of the flexible pipeline in a downward direction with respect to the axis of the reactor at a first pressure while unreeling the flexible pipeline from the reel to drill a hole through the coke in the coke reactor; changing the water pressure from a first pressure to a second pressure; and ejecting the water from the nozzle array in a lateral direction at the second pressure to cut and discharge coke lining the bore from the reactor while reeling the flexible pipeline on the reel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification