Abstract: A method of treating a gaseous hydrocarbon contained in waste gas by using adsorbent layers of single-tower or multi-tower configuration is characterized in that (1) double-cylinder type or multi-cylinder type adsorption apparatus, in which each adsorbent layer is indirectly cooled by cooling water, are employed as adsorption apparatus; (2) each adsorbent layer is a packed layer of one or more kinds of materials selected from activated carbon, synthetic zeolites and hydrophobic silica gel; (3) swing time required for switching between adsorption and desorption processes is set to 1 to 15 minutes; (4) each adsorbent layer is evacuated under vacuum while being purged by using part of clean gas evacuated from each adsorbent layer and/or air in the desorption process; and (5) the gaseous hydrocarbon is recovered from outflow purge gas. This method makes it possible to prevent abnormal temperature increase within each adsorbent layer and enhance the safety of the apparatus.

Abstract: A catalyst packing apparatus with which a desired packed density can be easily and surely obtained by use of a suspended type catalyst ejector, wherein correlated data giving a scattering height from which a desired packed density can be obtained has been determined and stored beforehand in a memory part 74, and by setting a desired packed density, prior to the scattering of catalyst, a selecting part 75 selects a scattering height corresponding to the desired packed density from the correlated data in the memory part 74 and delivers the same to an adjusting part 76 which controls the catalyst ejector 30 so as to obtain this scattering height, thereby the catalyst 11 in a reaction tower 10 can be packed at the desired packed density.

Abstract: Provided are a catalyst packing method and a catalyst packing apparatus with which a desired packed density can be easily and surely obtained by use of a suspended type catalyst ejector, wherein correlated data giving a scattering height from which a desired packed density can be obtained has been determined and stored beforehand in a memory part 74, and by setting a desired packed density, prior to the scattering of catalyst, a selecting part 75 selects a scattering height corresponding to the desired packed density from the correlated data in the memory part 74 and delivers the same to an adjusting part 76 which controls the catalyst ejector 30 so as to obtain this scattering height, thereby the catalyst bed 11 in a reaction tower 10 can be packed at the desired packed density.

Abstract: A rotation driving system drives unitedly and rotatably sprinkle rotors, which the disk sprinkle rotors having plural partitive members extending in predetermined distances in a radial direction to the rotating axis are arranged in multistage state with a predetermined distance in a longitudinal direction. In the aforementioned state, by supplying the catalyst to the center of the sprinkle rotor, the catalyst is fed into a reaction tank while releasing in a radial direction of the sprinkle rotor. When the catalyst is fed, a rotation frequency of the sprinkle rotor is defined to be a speed constituent in a radial direction of over zero when the catalyst settles down and to be periodically changed between a maximum rotation frequency and a minimum rotation frequency.