Material or article handling – Chamber of a type utilized for a heating function and... – Charging of chamber
Patent
1996-10-01
1999-04-27
Werner, Frank E.
Material or article handling
Chamber of a type utilized for a heating function and...
Charging of chamber
141232, 422219, 414749, 414162, 414198, 414 21, B65G 2716
Patent
active
058972820
ABSTRACT:
A catalyst loading system for utilizing catalyst from a bulk supply located adjacent but not on the upper tube sheet of a catalytic reactor and for mechanized measuring of multiple identical quantities of catalyst and for mechanized loading of catalyst pellets into the reaction tubes of the reactor to achieve even drop rate, compaction and outage of the reaction tubes. From the bulk supply, multi-compartment catalyst charging hoppers are individually filled in rapid and accurately measured fashion by mechanized filling equipment having a predetermined sequence of operation that ensures accuracy of volumetric catalyst measurement. The charging hoppers are used for delivery of measured volumes of catalyst of a reactor tube loading mechanism which may take the form of a mobile cart framework being selectively positionable relative to the upper tube sheet and reaction tubes of a catalytic reactor to be charged with catalyst pellets. A pair of electronic vibrators are mounted to the cart framework and provide for support and vibratory movement of a vibratory tray having a catalyst feed hopper adapted to feed catalyst pellets to a plurality of generally parallel catalyst transfer troughs along which catalyst pellets are moved by vibration of the vibratory tray to a plurality of drop tubes. A compartmented hopper is fixed to the vibratory tray and controllably feeds catalyst pellets into respective catalyst transfer troughs. A plurality of charging tubes are connected to respective drop tubes by a plurality of elongate flexible tubes and are maintained in fixed, spaced relation by a structural element so as to define a charging manifold for simultaneous, timed delivery of catalyst pellets into a plurality of reactor tubes. The charging manifold has locator pins which are inserted into selected reactor tubes for orienting the charging tubes of the charging manifold with respect to a selected group of reaction tubes. A system is also provided for raising and lowering the charging manifold for efficiency of reactor tube charging operations. An electronic control system is effective for controlling the vibrators to achieve even drop rate from each of the catalyst transfer troughs and to control the vibrators responsive to catalyst weight to achieve even catalyst drop rate during an entire catalyst charging cycle.
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