Dispensing – Automatic control – Cutoff operated by rate of flow responsive mechanism
Patent
1995-02-15
1996-10-15
Kashnikow, Andres
Dispensing
Automatic control
Cutoff operated by rate of flow responsive mechanism
222 61, 222136, 68 17R, 134 991, 3644791, B67D 508
Patent
active
055645950
ABSTRACT:
An automatic chemical dispensing system is provided wherein a preselected quantity of liquid chemical drawn from one of several storage vessels is dispensed to one of several different receptacles using a single operating pump. The system includes a single remote controllable operating pump, remote controllable inlet and discharge valves, a single flow indicator and a liquid flush system. The system is controlled by a computerized controller. Piping linking the storage vessels, the pump and the receiving vessels is configured so that the operating pump draws a requested chemical from the appropriate storage vessel and pumps that chemical into a discharge header located between the pump and the receiving vessel. As the operating pump pumps the chemical into the discharge header, flow through the header is noted on the single flow indicator. When the requested amount of chemical is noted by the controller to have flowed through the flow indicator, a liquid flush header is opened and the discharge header is flushed into the receiving vessel with a flushing liquid, such as water. In a preferred embodiment, a gas flush system is connected to the discharge header downstream of the flow controller for more rapid injection of chemicals. The system uses no dilution manifold or flow orifices. Chemical and flushing liquid are rapidly and accurately delivered in essentially "plug flow" form directly into the receiving vessel.
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Anderson Denton L.
Dergkshani Philippe
Kashnikow Andres
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