Liquid purification or separation – Processes – Separating
Patent
1986-10-23
1988-04-26
Coe, Philip R.
Liquid purification or separation
Processes
Separating
81493, 8151, 15306A, 34115, 68 5E, 68 45, 68181R, 210401, B01D 3304, D06B 508
Patent
active
047403055
ABSTRACT:
The invention is a method and apparatus for treating a permeable web with a fluid. The apparatus has a rotatable drum with a fluid permeable endless belt reeved about at least a portion of the drum circumference. Two or more spaced-apart press rolls bear against the outer surface of the belt, pressing it against the drum with sufficient force to form nip zones. A belt position control mechanism gives the belt limited freedom of radial movement away from the drum in the area between the nip zones. This permits a gap of controllable dimension to form between the drum and the belt. The gapped region defines a volume which creates a permeable web treating zone. The drum surface has at least one row of spaced apertures located entirely around its circumference. These apertures communicate with a fluid supply system which can supply treating fluid under pressure outwardly through the surface apertures into the treating zones between the press rolls. Seals between the edges of the belt and the drum prevent fluid leakage along the belt margins. A conventional driving apparatus completes the apparatus. In use, the web of material being treated is passed between the moving belt and rotating drum. Treating fluid under pressure is directed outwardly through the drum apertures against the drum facing surface of the web as it passes through the treating zone.
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Applicant's pending application Ser. No. 849,931, filed Apr. 8, 1986.
Coe Philip R.
Gehr Keith D.
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