Cleaning apparatus for a process vessel

Details Cleaning apparatus for a process vessel Cleaning apparatus for a process vessel

1990-03-16

1991-06-04

Hornsby, Harvey C.

Brushing, scrubbing, and general cleaning

Attachments

Tank cleaners

1510407, 151041C, 134167R, F22B 3748

Patent

active

050201832

ABSTRACT:
An apparatus and method for cleaning hard deposits from the interior wall of a digester vessel. The apparatus includes a work platform assembled within the interior of the vessel from a plurality of prefabricated frame elements introduced into the vessel through a limited access port formed in the vessel wall. The work platform has an open central region to permit passage around a central shaft and radial paddles vertically disposed within the vessel. The platform is raised and lowered within the vessel by cables attached to motors. The apparatus further includes a ring-shaped guide rail on the work platform and a hydraulically activated impact hammer carried on a support arm assembly. The support arm assembly has one end releasably secured to the central shaft within the vessel and the other end supports a motor-driven roller cluster for travel along the guide rail. The support arm also carries a pivotal and extensible boom assembly for hydraulically moving the impact hammer in several degrees of freedom to permit access to all interior wall areas of the vessel. A flexible conduit or bundle of conduits connects the hammer, the roller cluster motor, and related hydraulics to a remote power source outside of the vessel. After the vessel is cleaned, the apparatus is disassembled within the vessel and removed through the access port.

REFERENCES:
patent: 1325638 (1919-12-01), Healey
patent: 1569203 (1926-01-01), Rice et al.
patent: 3302976 (1967-02-01), Grant
patent: 3471888 (1969-10-01), Grant et al.
patent: 3679477 (1972-07-01), Zimmer
patent: 4210976 (1980-07-01), Adelt et al.

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