Overcharge prevention arrangement

Details Overcharge prevention arrangement Overcharge prevention arrangement

1984-07-09

1985-12-31

Bashore, S. Leon

Distillation: apparatus

Apparatus

Systems

202193, 202196, 202202, 202205, 203 1, 203 91, 137434, B01D 342, F16K 3118

Patent

active

045619409

ABSTRACT:
The overcharge prevention device is installed in a solvent processing plant in a vacuum evaporator of a heat exchanger. It assures that the level of the cleaning solution in the vacuum evaporator cannot randomly rise when a feed valve malfunctions. A float body of an overcharge valve extending into the vacuum evaporator exerts a pressure through a double-arm lever and a valve plunger upon a ball valve and a valve seat in normal operation and holds the overcharge valve in a closed position. As the level of the cleaning solution undesirably rises, the buoyant action of the cleaning solution acts on the float body, causing the pressure on the valve seat to diminish, and the overcharge valve opens. This permits air to enter into the vacuum evaporator through the overcharge valve. The generated vacuum collapses and the suction force employed to ingest the cleaning solution disappears. Cleaning solution is only delivered to the vacuum evaporator again when the level thereof in the vacuum evaporator has been lowered by draining residue and the malfunction of the feed valve has been eliminated, as by cleaning thereof.

REFERENCES:
patent: 790878 (1905-05-01), Bailey
patent: 987140 (1911-03-01), Houser
patent: 1890152 (1932-12-01), Hills
patent: 2720215 (1955-10-01), Stott
patent: 2756769 (1956-07-01), Martin et al.
patent: 3558436 (1971-01-01), Foley et al.
patent: 4185339 (1980-01-01), Morales
patent: 4192341 (1980-03-01), Hilmer
patent: 4235677 (1980-11-01), Karamian
patent: 4419773 (1983-12-01), Sullivan

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