Liquid purification or separation – Flow – fluid pressure or material level – responsive – Float
Patent
1995-06-05
1997-04-22
Upton, Christopher
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Float
210128, 210519, 210540, B01D 17025, B01D 17032
Patent
active
056226195
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an off-take system for the separator basin of a light liquid separator, with a separator container, the upper area of which incorporates an inlet opening for the liquid mixture that is to be cleaned, an overflow opening for light liquid, and an overflow opening for water.
An oil off-take system of this kind, which can be incorporated into a light liquid separator, is described, for example, in AT-B 394 846. In this, the lower edge of the water overflow opening is located lower down than the lower edge of the oil overflow opening, the water overflow opening being separated from the remainder of the container by a baffle that reaches almost to the bottom of the container. Thus, only water can emerge from the water overflow opening and water-free oil passes out through the oil overflow opening as soon as the layer of oil has reached a thickness that corresponds to the difference in level of the two lower edges of the openings. The water-free oil flows into a collector and the oil-free water flows into the separator, from which, in the usual way, it passes into the channel or the like. Any disruption of the run-off means that the level of liquid in the off-take system rises which can result in an overflow and remixing of the light liquid with the water.
Float-operated inlet shut-off valves in the separator itself are described in DE-A 41 10 091 and in AT-B 393 670. In both cases, the opening of the intake pipe is closed off by a valve in the separator chamber.
It is the task of the present invention to avoid malfunctions in an off-take system of this kind if the removal of the light liquid and/or the removal of the water is disrupted, and to this end it proposes that at least one of the two overflow openings has an associated collector with a float; and that a closing system that is operated by a float in the collector tank is provided at the inlet opening into the separator container.
Thus, the in-flow is shut off as a function of the level of liquid in the collector tank so that the liquid in the separator tank is not affected by the float.
A first preferred embodiment makes provision such that each overflow opening has an associated collector tank; and that between the float and the closing system there is an operating linkage.
A further preferred embodiment makes provision such that the operating linkage for the float in the water collector tank activates the closing system and the operating linkage for the float in the light liquid collector tank acts on the operating linkage of the float in the water collector tank. Despite the selective operation by the particular rising float in each instance, a simple closing system for the inlet opening that has a single operating possibility can be used for the inlet opening.
If the collector tank for water has a drain into the separator, in another preferred embodiment, a build-up through the drain is prevented in that a second closing system that is operated by the float is associated with the drain of the water collector tank, and this functions as a water non-return valve.
It is preferred that the water collector tank be divided into two chambers by an intermediate bottom in which there is an opening. In this embodiment, the lower chamber contains the float and has in its top a shut-off element of the second closing system as a non-return valve for the upper chamber and thus for the separator container, so that when the float rises the opening is closed at the same time as the inlet.
The present invention will be described in greater detail below on the basis of the figures appended hereto, without necessarily being confined thereto. These drawings show the following:
FIG. 1: a perspective view of an off-take system according to the present invention;
FIG. 2: a vertical cross-section on the line II--II in FIG. 1.
An off-take system that can be incorporated into a separator basin 20 of a light liquid separator incorporates a separator tank 1 in which there is an inlet opening 2, a light liquid overflow opening 5 and a water overfl
REFERENCES:
patent: 787365 (1905-04-01), Franey
patent: 1252099 (1918-01-01), Donovan
patent: 1576930 (1926-03-01), Perry
patent: 2826306 (1958-03-01), Burns
patent: 3971719 (1976-07-01), Peters
patent: 4436630 (1984-03-01), Anderson
patent: 5151185 (1992-09-01), Hammerschmitt
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