DE2552568A1 - DEVICE FOR SIGNALING THE MAXIMUM PERMISSIBLE SLUDGE ROOM FILLING, IN PARTICULAR IN SEPARATORS - Google Patents

Description

Art em, 7/25/75

Device for signaling the maximum permissible sludge space filling, especially in separators

The invention relates to a device for signaling the maximum permissible sludge chamber filling, the rotating drum of a self-cleaning separator, in which the well-known principle of the light barrier comes to the Aawenduag.

There are known methods and devices in which the phase boundaries of two media in separator drums by scanning the phase boundaries with the aid of radiation emitted from a light source or from a radioactive substance emitted is determined. Seader or receiver are each outside the rotating drum.

In the optical method, a light beam that falls through a window provided is used for determination the phase boundaries. The interruption of the beam path by covering the window with Because the light source or the radiation receiver in the drum rotate with it would have to, the energy transmission or signal transmission only take place via slip rings or inductive transmitters. This method has the disadvantage on that great difficulty in construction occur and the effort is not justified by the benefits achieved Procedure must be beamed through the drum walls what has to be disadvantageous is that the density of the too uaterscheidesde »phases is small in relation to the Density toad thus to the absorption capacity of the drum material. Another disadvantage of this procedure is in the high economic effort uad ia the necessary Security precautions.

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The purpose of the invention is to rule out the disadvantages of the known prior art mentioned and by means of a relatively simple and inexpensive device, a continuous or quasi-continuous one To enable control and monitoring of the separators.

The invention is based on the object to develop a device that allows the determination of the Position of the phase boundaries between two media, in particular in separator drums, is made possible and when the limit value is reached, a signal is sent to the control unit controlling the workflow.

According to the invention this was achieved in that the radiation from a light source, which is separated by two Light guide bundle of known design from the outer drum surface into the sludge chamber and from there again is discharged through sludge deposits between the end surfaces in the sludge space of the two light guide bundles, is interrupted and the interruption by a radiation receiver, which is is located at the exit point of the radiation outside the drum, registered and converted into an electrical one Signal is converted. The end surfaces of the two light guide bundles in the sludge chamber are attached in such a way that that they can be reached by the sludge deposits when the sludge chamber is filled, whereby for Measurement exploits the fact that sludge deposits and other separating medium are different have optical properties with respect to radiation absorption. The device has the Advantage that a continuous or quasi-continuous or point-by-point determination of the position of the Phase boundaries preferably in separator drums is possible and thus a monitoring or control

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the .work processes on separator drums guaranteed Furthermore, this process is inexpensive and works precisely and without major sources of interference Reliable.

The invention is intended below using an exemplary embodiment can be explained in the accompanying drawing shows"

Fig. 1 shows the cross-section of a self-cleaning separator with intermediate plates in the drum upper part is arranged a Signaluebertragungsstrecke that from the ends of the I & chtleitbuendel 5; 7 and the radiation is 5a which Iiiohtquelle receiver 8, wherein the ends 55 5a of the LichtIeitbuendel are in the drum 9l9a The end of the light guide bundle 5 is arranged on a radius of the drum upper part through a gap from the end of the Idchtleitbüendels 5a in such a way that the radius of the boundary layer 4 coincides with the radius of the gap between the interruption parts 5 »5a, the boundary layer 4 from the maximum sludge space filling 3 and the remaining separating medium 2. The sludge settles in the bottom space 1, which is then maximally filled when the boundary layer 4 has been reached. In this case the space between the ends 5 5 5a is established the light guide bundle 959a with sludge deposits and interrupts the St Ray 6 of the light source 7. The interruption is registered by the radiation receiver.

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Claims (8)

Claims Device for signaling the maximum permissible sludge chamber filling of the rotating Drum of a self-cleaning separator, in which the principle of the light barrier known per se Application comes. This is indicated by the fact that the Ends of the fiber optic bundle of an optical signal transmission path from an outside the drum located light source (8) and a known per se for converting the optical signal Receiver device (9) consists of two separate ones that penetrate the drum wall Light guide bundle (10)} (10a) of known design laid in the sludge space of a separating drum will. 2. Device according to claim 1, characterized in that the light in and back radiation in the sludge space (1) or from the sludge chamber (i) with a light guide bundle of known design. 3 »Device for the quasi-continuous determination of the sludge space filling of the rotating drum a self-cleaning separator, in which the characterized according to main claim 1 in principle Device, is used, characterized in that in the drum upper part several on different Radii lying according to claim 1 characterized signal transmission paths are provided, where the unused interruption points are set blind. 609827/0582 List of reference numbers for the invention '' Device for determining the turf boundaries, especially in s epar iertr oiaraeln ' 1 Schlarmaraun 2 Separierinediur-i of lower density 3 Filling of the muddy brown 4 interface between Schlamnfuellung and uebrigem Separiex medium ⁱ 5; 5a ends of the Liclitleitbundel 6 beam path 7 light source 8 Receiving device 9 »9a Light guide bundle 609827/05 82 Blank page