Invention Application
US20070020154A1 Catalyst withdrawal apparatus and method for regulating catalyst inventory in a fluid catalyst cracking unit 有权
用于调节流体催化裂化装置中催化剂存量的催化剂抽出装置和方法

Catalyst withdrawal apparatus and method for regulating catalyst inventory in a fluid catalyst cracking unit
Abstract:
A catalyst withdrawal apparatus and method for regulating catalyst inventory in a fluid catalytic cracking catalyst (FCC) unit is provided. In one embodiment, a catalyst withdrawal apparatus for removing catalyst from a FCC unit includes a pressure vessel having a metering device coupled to a fill port. A heat dissipater is located adjacent the metering device and is adapted to cool catalyst entering the pressure vessel. A sensor is coupled to the pressure vessel arranged to provide a metric indicative of catalyst entering the pressure vessel through the metering device. In another embodiment, a method for regulating catalyst inventory in a FCC unit includes the steps of determining a change of catalyst present in a FCC unit, withdrawing catalyst from the FCC unit into an isolatable storage vessel coupled to the FCC unit, measuring the amount of catalyst disposed in the storage vessel, and removing the measured catalyst from the storage vessel.
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