Method of disposing of waste in a coking process
First Claim
1. A method for recycling a waste stream containing water and solids, comprising:
- (a) removing water from the waste stream to produce a second stream containing less than 60% by weight water;
(b) drying the second stream to produce a waste feed charge containing less than 15% by weight water and at least 30% by weight solids; and
(c) injecting the waste feed charge into a coker during the coking cycle.
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Accused Products
Abstract
A method for recycling a waste stream containing water and solids comprises (a) removing water from the waste stream to produce a second stream containing less than 60% by weight water, (b) drying the second stream to produce a waste feed charge containing less than 15% by weight water, and (c) injecting the waste feed charge into a coker during the coking cycle. The water removal can be carried out in one or more steps, and can be carried out in a vertical disk centrifuge if it is also desired to reduce the particle size of the solids fraction. The waste feed charge can be injected into a delayed coker, flexicoker, or fluid coker, and allows the recycle of solid waste into the coke.
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Citations
33 Claims
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1. A method for recycling a waste stream containing water and solids, comprising:
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(a) removing water from the waste stream to produce a second stream containing less than 60% by weight water;
(b) drying the second stream to produce a waste feed charge containing less than 15% by weight water and at least 30% by weight solids; and
(c) injecting the waste feed charge into a coker during the coking cycle. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for recycling solid components of a waste stream, comprising:
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(a) separating the solids from the waste stream to produce a solids charge;
(b) adding oil to the solids charge in an amount 0.5 and 1.5 times the weight of the solids;
(c) reducing the water content of the solids to less than 15 percent by weight of the total solids charge to produce a pumpable waste feed charge containing at least 30% by weight solids; and
(d) injecting the pumpable waste feed charge into a coker. - View Dependent Claims (8, 9, 10, 11, 12, 32)
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13. A method for recycling components of a waste stream containing a liquid organic component, water and solids comprising:
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(a) separating said waste stream into a liquid organic fraction, a water fraction, and a solids fraction containing less than about 60% by weight water in a first dewatering step;
(b) admixing oil with said solids fraction to produce a feed charge;
(c) heating said feed charge so as to evaporate water and produce a pumpable waste feed charge comprising less than about 15% by weight water, greater than about 30% by weight solids, and from about 30 to about 70% by weight oil; and
(d) injecting said waste feed charge as a feed stream into a coker during a coking operation. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33)
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Specification