Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Patent
1987-01-05
1988-07-12
Sneed, Helen M. S.
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
134 24, 134167R, 134169R, 122390, 122391, 122392, B08B 900
Patent
active
047567694
ABSTRACT:
The spaces into which the vessel is divided by means of horizontal perforated partions are successively cleaned from top to bottom. Firstly the uppermost space is cleaned: the cover of the access to the space is removed, through the access a high-pressure lance is equipped with a spray head comprising a body rotatable about the lance axis and spray arms rotatably mounted on said body and liquid is sprayed with a pressure lying between 35 and 50 MPa. Then the middle space is cleaned: the cover of the access to the space is removed, through the access a high-pressure lance is equipped with a fixed spray head provided with spray openings directed in various directions and liquid is sprayed with a pressure lying between 50 to 70 MPa. Finally the lowermost space is cleaned in the same way as the uppermost space. The cleaning liquid is discharged through the outlet in the vessel bottom.
REFERENCES:
patent: 3024134 (1962-03-01), Schlott
patent: 3311092 (1967-03-01), McMahlon et al.
patent: 4079701 (1978-03-01), Hickman et al.
patent: 4273076 (1981-06-01), Lahoda et al.
patent: 4424769 (1984-01-01), Charamathieu et al.
patent: 4452183 (1984-06-01), Yazidjian
patent: 4565206 (1986-01-01), Booij
patent: 4653435 (1987-03-01), Lebouc
English translation of claim 1 of FR-A-2.289.850 (Bettella).
Cohen Sharon T.
Innus Industrial Nuclear Services S.A.
Sneed Helen M. S.
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