Apparatus for decoking a delayed coker using a flexible pipe
First Claim
1. An apparatus for decoking at least one residual oil delayed coke reactor having a top opening, the apparatus comprising:
- means for supplying water under pressure;
a flexible pipe having an axis and first and second ends;
supporting means for the flexible pipe with the axis thereof oriented vertically in alignment with the top opening in the coke reactor;
a reel mounted on the support means for coiling the flexible pipe therearound, the reel having a hollow drive shaft with a radial opening and an axial opening, the radial opening being connected to and in communication with the first end of the flexible pipe and axial opening being connected to the means for supplying water under pressure;
a nozzle array connected to the second end of the flexible pipe, the nozzle array having radially opening nozzle means for dispensing pressurized water radially with respect to the axis of the flexible pipe and vertically opening nozzle means for dispensing pressurized water downwardly; and
control means for selectively switching dispensing of water between the radially opening nozzle means and vertical nozzle means upon changing the pressure of the water from a first pressure to a second pressure, whereby water is initially ejected in a downward direction at the first pressure as the flexible pipe is unreeled from the reel to bore a hole through the coke in the reactor and ejected in a radial direction thereafter to cut and discharge coke lining the hole.
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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.
23 Citations
6 Claims
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1. An apparatus for decoking at least one residual oil delayed coke reactor having a top opening, the apparatus comprising:
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means for supplying water under pressure; a flexible pipe having an axis and first and second ends; supporting means for the flexible pipe with the axis thereof oriented vertically in alignment with the top opening in the coke reactor; a reel mounted on the support means for coiling the flexible pipe therearound, the reel having a hollow drive shaft with a radial opening and an axial opening, the radial opening being connected to and in communication with the first end of the flexible pipe and axial opening being connected to the means for supplying water under pressure; a nozzle array connected to the second end of the flexible pipe, the nozzle array having radially opening nozzle means for dispensing pressurized water radially with respect to the axis of the flexible pipe and vertically opening nozzle means for dispensing pressurized water downwardly; and control means for selectively switching dispensing of water between the radially opening nozzle means and vertical nozzle means upon changing the pressure of the water from a first pressure to a second pressure, whereby water is initially ejected in a downward direction at the first pressure as the flexible pipe is unreeled from the reel to bore a hole through the coke in the reactor and ejected in a radial direction thereafter to cut and discharge coke lining the hole. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification