Sludge dewatering and destruction within a delayed coking process
First Claim
1. A method for disposing of refinery sludge in a delayed coking process employing a coker heater, at least one coke drum in which coke is formed, a fractionator and a blowdown drum, in which oil vapors from coke formed in the coke drum are sent to the blowdown drum where the oil vapors condense into oil, comprising:
- feeding the sludge to the blowdown drum, where the sludge mixes with the oil to form a sludge-oil mixture; and
feeding the sludge-oil mixture to the coke drum during the formation of coke, whereby the sludge in the sludge-oil mixture is incorporated in the formed coke.
7 Assignments
0 Petitions
Accused Products
Abstract
Wet refinery sludges are disposed of by feeding them into a delayed coking process. The sludge is fed to the blowdown drum of the delayed coking process and mixed with oil condensed from the coke drum overhead, and the resulting sludge-oil mixture is fed to the coke drum where it is converted into coke. In order to remove the water from the sludge, a portion of the sludge-oil mixture is heated and recirculated to the blowdown drum where it provides the heat for drying and heating the sludge. The recirculating sludge-oil mixture is heated by a low level heat source, such as one of the fluid streams taken off from the fractionator.
25 Citations
20 Claims
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1. A method for disposing of refinery sludge in a delayed coking process employing a coker heater, at least one coke drum in which coke is formed, a fractionator and a blowdown drum, in which oil vapors from coke formed in the coke drum are sent to the blowdown drum where the oil vapors condense into oil, comprising:
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feeding the sludge to the blowdown drum, where the sludge mixes with the oil to form a sludge-oil mixture; and feeding the sludge-oil mixture to the coke drum during the formation of coke, whereby the sludge in the sludge-oil mixture is incorporated in the formed coke. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A combined delayed coking and refinery sludge disposal system comprising:
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at least one coke drum; a blowdown drum in fluid communication with said coke drum to receive oil removed from coke in said coke drum; means for conducting wet refinery sludge to said blowdown drum; means for mixing the oil and the sludge in said blowdown drum to form a mixture; means for conducting the mixture to said coke drum; and means for drying the sludge in said blowdown drum. - View Dependent Claims (15, 16, 17, 18)
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19. A combined delayed coking and refinery sludge disposal system comprising:
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at least one coke drum; a blowdown drum in fluid communication with said coke drum to receive oil removed from coke in said coke drum; means for conducting wet refinery sludge to said blowdown drum; means for mixing the oil and the sludge in said blowdown drum to form a mixture; means for conducting the mixture to said coke drum; and means for diluting the mixture. - View Dependent Claims (20)
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Specification