VACUUM METHOD
Catalyst unloading may be accomplished by vacuuming from the entry manway, or dumping from the unloading nozzle or flange located at the base of the reactor. Unloading by the vacuum method is normally required under the following circumstances.
- For removal of top support and upper zone catalyst only, as in a reactor skim.
- When bed rotation or segregation of different catalyst is desirable.
- Where sampling of catalyst at different zones is needed for evaluation.
- For total recovery of precious metals or other hazardous materials.
When space, access or the reactor design dictates.
- To retain support for reuse, it may be less expensive to skim and classify the support rather than to screen and classify the entire charge.
Catalyst Handling Services Company (CHSC) has designed and fabricated the catalyst handling equipment to specific criteria required for proper catalyst handling. Cyclone separators enable for continuous catalyst removal at rates as high as 900 cubic feet per hour.
CHSC can accomplish vacuum unloading in atmospheric or inert conditions. A major consideration when vacuuming an inert purged reactor is conservation of nitrogen and maintenance of the inert atmosphere. The recirculation and cooling system used by the CHSC will assure optimum use of the nitrogen.
GRAVITY UNLOADING METHOD
The CHSC has assembled material handling equipment that will collect, transport and transfer your reactor catalyst from the dump nozzle to any size container that you may desire. Our external dust collectors will recover air born particulate during the material transfer phase of collection.
WATER FLOOD OR CHEMICAL PURGE
With this method water or chemicals are introduced into the reactor through the feed inlet piping or product outlet piping nozzles. CHSC has the technology necessary to flood and dump catalyst when this method is desired by our client.
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