Apparatus for packing catalyst

A catalyst packing apparatus, comprising:

• a catalyst ejector suspended in a reaction tower for scattering catalyst in said reaction tower to form a catalyst bed, said catalyst ejector being adjustable in its suspended height, and control means for controlling the height of said catalyst ejector, wherein said control means comprises sensing means for measuring a scattering height between said catalyst ejector and a surface of the catalyst bed in said reaction tower, a memory part for storing therein a relationship between the scattering height measured from said surface of the catalyst bed in said reaction tower to said catalyst ejector and a packed density of the catalyst bed scattered from said scattering height, a selecting part for selecting a scattering height corresponding to a designated packed density from said memory part, and an adjusting part for adjusting the height of said catalyst ejector so as to obtain said scattering height selected by said selecting part, said sensing means including at least one radially extendable holding arm and a distance sensor, said holding arm being supported from said catalyst ejector, being retractable into a first position having a free end of said holding arm adjacent said catalyst ejector and being extendable into a second position having said free end of said holding arm remote from said catalyst ejector, said distance sensor being attached to said free end of said holding arm for measuring a height from the distance sensor to said surface of said catalyst bed, and said distance sensor communicating said measured height to said control means.