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"freon" Solvent Twd 602 Regeneration System

IP.com Disclosure Number: IPCOM000061155D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Fasbender, DV: AUTHOR [+2]

Abstract

A "Freon" solvent cleaning tank for computer part processing contains a cleaning fluid which is a mixture of Freon solvent, water and surfactant. As the solvent takes on contamination a scum forms on the surface of the fluid. The scum is a water/ contaminant mixture which must be removed and then replaced with fresh water. The standard technique calls for separate settling tanks and overnight settling of the solution. The new technique uses a vacuum system to remove the scum from the cleaning fluid. No settling tanks are required and the entire process can be performed in a matter of minutes.

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"freon" Solvent Twd 602 Regeneration System

A "Freon" solvent cleaning tank for computer part processing contains a cleaning fluid which is a mixture of Freon solvent, water and surfactant. As the solvent takes on contamination a scum forms on the surface of the fluid. The scum is a water/ contaminant mixture which must be removed and then replaced with fresh water. The standard technique calls for separate settling tanks and overnight settling of the solution. The new technique uses a vacuum system to remove the scum from the cleaning fluid. No settling tanks are required and the entire process can be performed in a matter of minutes.

When the cleaning tanks are shut down with the rest of the manufacturing line such as over a weekend, the scum created by the contaminants floats to the surface of the solvent. Before starting up the cleaner, the solvent can be regenerated by performing the following operation. Referring to the figure, the sequence of operations is as follows: 1. Open valve 1 to turn on vacuum supply.
2. Move the vacuum nozzle arm 2 across the tank 8 from Point A to Point B to move vacuum nozzle 10 across the surface of the cleaning fluid. This operation removes the scum that has collected on the surface of the cleaning tank. 3. Close valve 1 to turn off vacuum supply.

4. Add water to rebalance the solvent. This is done by opening valve 3 and setting the timer (not shown) to actuate solenoid 4 and allow a set amount of water to flow into the tank....