Method for automated de-coking
First Claim
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1. A method of controlling de-coking of a petroleum coke drum with a hydro-blasting drill supported by a vertical hoist comprising the steps of:
- entering predetermined operational control parameters comprising drill rotation speed, vertical elevation drill speed, vertical drill elevation position and drill tension into a programmable logic controller,sensing the vertical position of the hydro-blasting drill in the coke drum and generating an electrical drill elevation signal,sensing the tension being imposed by the vertical hoist on the hydro-blasting drill in the coke drum and generating an electrical drill tension signal,sensing the rotation speed of the hydro-blasting drill in the coke drum and generating an electrical drill rotation speed signal,coupling the electrical drill elevation signal, drill tension signal and drill rotation speed signal to said programmable logic controller,coupling the programmable logic controller to a power source for the vertical hoist and to a rotation drive source for the hydro-blasting drill,controlling the drill rotation speed, vertical elevation position and the tension imposed on the hydro-blasting drill during de-coking of the petroleum coke drum with electrical signal outputs from the controller.
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Abstract
Method for automated hydro-blast de-coking of delayed coke drums wherein programmed central control receives input of drill stem tension, drill bit elevation and drill stem rotation along with indications as to hydraulic hoist power and air pressure input to the drill stem rotary motor, and functions to provide control outputs to automatically control the pilot and main bed cutting procedures attendant an entire drum de-coking operation.
71 Citations
5 Claims
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1. A method of controlling de-coking of a petroleum coke drum with a hydro-blasting drill supported by a vertical hoist comprising the steps of:
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entering predetermined operational control parameters comprising drill rotation speed, vertical elevation drill speed, vertical drill elevation position and drill tension into a programmable logic controller, sensing the vertical position of the hydro-blasting drill in the coke drum and generating an electrical drill elevation signal, sensing the tension being imposed by the vertical hoist on the hydro-blasting drill in the coke drum and generating an electrical drill tension signal, sensing the rotation speed of the hydro-blasting drill in the coke drum and generating an electrical drill rotation speed signal, coupling the electrical drill elevation signal, drill tension signal and drill rotation speed signal to said programmable logic controller, coupling the programmable logic controller to a power source for the vertical hoist and to a rotation drive source for the hydro-blasting drill, controlling the drill rotation speed, vertical elevation position and the tension imposed on the hydro-blasting drill during de-coking of the petroleum coke drum with electrical signal outputs from the controller. - View Dependent Claims (2, 3, 4, 5)
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Specification