Liquid purification or separation – Gravitational separator – Superposed compartments or baffles – e.g. – parallel plate type
Patent
1991-03-24
1992-09-29
Silverman, Stanley S.
Liquid purification or separation
Gravitational separator
Superposed compartments or baffles, e.g., parallel plate type
2105321, 210540, C02F 140
Patent
active
051511851
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This is a National Phase application of PCT/DE90/00429 and based upon German national application P 39 18 343-2 filed Jun. 6 1989.
FIELD OF THE INVENTION
The present invention is directed to a light-liquid separator with an inlet for a light liquid/heavy liquid mixture and including a heavy liquid outlet provided with means for receiving the heavy liquid from a light liquid balance room.
BACKGROUND OF THE INVENTION
Such a light liquid separator is for instance known from EP 0 118 021 B1. According to this known separator the heavy liquid flows over the corresponding overflow wall into the heavy liquid outlet. A small flow opening is provided below the overflow edge of this overflow wall. This flow opening has the effect that the heavy liquid level drops further when the overflow edge of the overflow wall is reached and the flow of the inflowing mixture is stopped and, in the inoperative condition, adjusts itself at the level of the bottom of the flow opening. Upon corresponding inflow the heavy liquid level increases again so that the heavy liquid flows again over the overflow edge. Therefore, permanent heavy liquid level variations result which are utilized for the outflow of the light liquid.
If in the inoperative condition of the separator the heavy liquid level has reached its lowest level (bottom of the small flow opening), light liquid can still remain within the separator chamber which is removed only after a new inflow of mixture through the light liquid outlet.
Thus, a light-liquid separator which is especially effective with regard to the removal of light liquid from the separator chamber has not been provided yet.
OBJECTS OF THE INVENTION
Therefore the principle of the present invention is to provide a light-liquid separator avoiding drawbacks of the prior art.
Yet another object of the present invention is to provide the separator providing the complete removal of the light liquid during an inoperative stage corresponding to termination of the mixture supply.
SUMMARY OF THE INVENTION
With a light liquid separator of the above-cited art this problem is solved according to the invention by the feature that a small flow opening connecting the light liquid balance room with the heavy liquid outlet is provided between the bottom of the heavy liquid outlet and the upper edge of the dip tube.
Accordingly, in the inventive embodiment, the light liquid balance room is in connection with the heavy liquid outlet. The separator chamber itself has no small flow opening to the heavy liquid outlet, as is the case with the above-cited prior art. Accordingly, the lowest liquid level in the separator chamber is determined by the upper edge of the dip tube opening into the light liquid balance room. An undisplaceable room develops thereby. On account of the connection between the light liquid balance room and the heavy liquid outlet, heavy liquid flows from the light liquid balance room into the heavy liquid outlet until the bottom of the small flow opening is reached. Then, in the light liquid balance room a corresponding heavy liquid level adjusts which is located lower than the heavy liquid level in the real separator chamber. This level difference has the effect that the light liquid accumulating in the separator chamber when mixtures flowing in is forced through the downwardly extending dip tube into the light liquid balance room and is then directed to the light liquid reservoir through the light liquid outlet tube leading away from this room.
In detail, the separator has the following function:
In the inoperative condition of the separator the liquid level of the separator chamber has a level which is identical with the upper edge of the dip tube. The liquid level cannot sink more since the chamber has no outlet opening at a lower location. Furthermore, in the inoperative condition the liquid level within the light liquid balance room has a level which is identical with the bottom of the small flow opening. When mixture flows in a corresponding separatio
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patent: 2782929 (1957-02-01), Colket
patent: 3731802 (1973-05-01), James
patent: 4132645 (1979-01-01), Bottomley et al.
patent: 4390421 (1983-06-01), Hammerschmitt
patent: 4422931 (1983-12-01), Wolde-Michael
Dubno Herbert
Silverman Stanley S.
Upton Christopher
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