Method and apparatus for metering catalyst in a fluid catalytic cracking catalyst injection system
First Claim
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1. Apparatus for metering catalyst in a fluid catalytic cracking catalyst injection system, comprising:
- a low pressure storage vessel;
a pressure vessel rigidly coupled to a supporting surface having an outlet adapted to be coupled to a fluid catalytic cracking unit and an inlet; and
a metering device coupling the storage vessel to the inlet of the pressure vessel.
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Abstract
A method and apparatus for metering catalyst in a fluid catalytic cracking catalyst injection system are provided. In one embodiment, apparatus for metering catalyst in a fluid catalytic cracking catalyst injection system includes a low pressure storage vessel coupled to a pressure vessel that defines a high pressure side of the apparatus, where the determination of the amount of catalyst transferred is made on the low pressure side of the apparatus.
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Citations
26 Claims
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1. Apparatus for metering catalyst in a fluid catalytic cracking catalyst injection system, comprising:
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a low pressure storage vessel;
a pressure vessel rigidly coupled to a supporting surface having an outlet adapted to be coupled to a fluid catalytic cracking unit and an inlet; and
a metering device coupling the storage vessel to the inlet of the pressure vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Apparatus for metering catalyst in a fluid catalytic cracking catalyst injection system, comprising:
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a low pressure storage vessel;
a pressure vessel having an outlet adapted to be coupled to a fluid catalytic cracking unit;
a control valve coupling a discharge port in the storage vessel to an inlet port of the pressure vessel; and
at least one load cell adapted to provide a metric indicative of a weight of the storage vessel. - View Dependent Claims (12, 13)
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14. A method for metering catalyst in a fluid catalytic cracking catalyst injection system, the method comprising:
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metering catalyst from a low pressure storage vessel to a pressure vessel using a metering device, wherein the metering device determines the quantity of catalyst dispensed with respect to the storage vessel;
pressurizing the pressure vessel to at least about 10 pounds per square inch; and
injecting the pressurized catalyst from the pressure vessel into a fluid catalytic cracking unit. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for metering catalyst in a fluid catalytic cracking catalyst injection system, the method comprising:
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determining a first quantity of catalyst disposed in a low pressure storage vessel;
transferring catalyst to a pressure vessel;
determining a second quantity of catalyst disposed in the low pressure storage vessel;
resolving a net transferred quantity of catalyst utilizing the first and second quantity of catalyst;
pressurizing the pressure vessel; and
injecting the pressurized catalyst into a fluid catalytic cracking unit.
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Specification