Cleaning and liquid contact with solids – Apparatus – With heating – cooling or heat exchange means
Patent
1992-10-27
1994-10-18
Stinson, Frankie L.
Cleaning and liquid contact with solids
Apparatus
With heating, cooling or heat exchange means
134111, 134200, 134147, 2104935, 210314, B08B 310
Patent
active
053559010
ABSTRACT:
An apparatus for precision cleaning with carbon dioxide includes a pressure vessel having a removable cleaning drum with a sanitized work zone, a separator for regenerating spent carbon dioxide, and pressure and temperature monitoring and control devices to maintain the carbon dioxide in a supercritical state while it is circulated in contact with a part to be cleaned. The sanitized work zone is defined by an impermeable drum body having removable entry and exit filters to ensure that circulating cleaning fluid does not redeposit contaminants on the parts. The separator includes distillation means. The pressure vessel and separator form part of an overall system, including a storage vessel for carbon dioxide, a pump, a preheater, a let-down valve in communication with the pressure vessel outlet, a condenser and a bypass.
The carbon dioxide is maintained in liquid form in the storage vessel, raised above its critical temperature by the preheater, pumped into the pressure vessel to achieve critical pressure, circulated through the work zone for a predetermined period of time, and removed through the let-down valve. The separator regenerates the carbon dioxide and carbon dioxide gas is then condensed and sent to the storage vessel for reuse.
REFERENCES:
patent: 524409 (1894-08-01), Wrigh
patent: 909604 (1909-01-01), Jaycox
patent: 1231987 (1917-07-01), Bickford
patent: 2267580 (1941-12-01), Turner
patent: 2498734 (1950-02-01), Bozanich
patent: 3041212 (1962-06-01), Booth
patent: 3063259 (1962-11-01), Hankison et al.
patent: 3293912 (1966-12-01), Kochaney
patent: 3948679 (1976-04-01), Lewis
patent: 3997303 (1976-12-01), Newton
patent: 4151400 (1979-04-01), Smith, Jr. et al.
patent: 4290821 (1981-09-01), Cosby
patent: 4336816 (1982-06-01), Horz
patent: 4441871 (1984-04-01), Boller
patent: 4443269 (1984-04-01), Capella et al.
patent: 4576792 (1986-03-01), Martensson
patent: 4657487 (1987-04-01), Schonwald et al.
patent: 4832753 (1989-05-01), Cherry et al.
patent: 4844743 (1989-07-01), Koblenzer et al.
patent: 4879004 (1989-11-01), Oesch et al.
patent: 4936922 (1990-06-01), Cherry
patent: 4961327 (1990-10-01), Bolzoni et al.
patent: 5013366 (1991-05-01), Jackson et al.
"Supercritical Fluid Extraction Plant", published by KOBELCO, date unknown.
News Release "Hughes, Autoclave Agree to Develop Ozone-Friendly Precision Cleaning System"; Autoclave Enginers, Oct. 15, 1991.
NASA Tech Brief "Cleaning With Supercritical CO.sub.2 ", Mar. 1979.
Metalonis John A.
Mielnik Richard J.
Reber Richard K.
Rosio Larry R.
Shore Stephen H.
Autoclave Engineers, Ltd.
Stinson Frankie L.
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