Method and system to remove coke from a coker drum
First Claim
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1. A method to remove coke from a coker drum comprising:
- a) impinging a fluid from fluid jet on a layer of coke on the inside surface of said coker drum,b) determining a vibration signal for a time period on a wall of the coke drum,c) determining amplitude versus frequency by a Fourier Transform of the vibration signal,d) repeating steps a) to c),e) lowering the fluid jet into a new layer of coke when the amplitude versus frequency of step d) indicates that a layer of coke has been removed and then repeating steps a) through d) until all of the coke has been removed from the coker drum.
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Abstract
The present invention is a method to remove coke from a coker drum. The invention includes the steps of impinging fluid from a fluid jet on the inside surface of the coker and then determining the vibration signal of the coker drum. The signal is then transformed to determine the amplitude versus frequency by a Fourier Transform of the vibration signal. The amplitude change of the vibration signal as it goes through a maximum, determines when the coke layer has been cut. The fluid jet is lowered into a new layer of coke.
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16 Claims
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1. A method to remove coke from a coker drum comprising:
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a) impinging a fluid from fluid jet on a layer of coke on the inside surface of said coker drum, b) determining a vibration signal for a time period on a wall of the coke drum, c) determining amplitude versus frequency by a Fourier Transform of the vibration signal, d) repeating steps a) to c), e) lowering the fluid jet into a new layer of coke when the amplitude versus frequency of step d) indicates that a layer of coke has been removed and then repeating steps a) through d) until all of the coke has been removed from the coker drum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification