DE2416839A1 - DEVICE FOR SEPARATING SOLID PARTICLES FROM LIQUIDS - Google Patents

Description

PATENTANWÄLTE D 59 Siegen

DIPL-ING. ERICH SCHUBERT MarburgerTor2 - P.O. Box 462

DIPL.- ING. ROLF PÜRCKHAUER ^{Telephone: 10271) 54070}

Telegram address: Patschub, Siegen

-5. APR. 1974

United Kingdom Atomic Energy Authority, 11, Charles II Street,

London SW1Y 4 QP

For this application the priorities from the UK patent applications Er. 17002/73 of April 9, 1973 and 4868/74 of February 1, 1974 claimed.

Device for separating solid particles from liquids

The invention relates to a device for separating solid particles from liquids.

The invention is based on the object of creating a device for separating spherical nuclear fuel particles, by gel excretion or filling from process fluids, for example ammonia, which is used as a filler in Gel precipitation process is used, and water which is used for Washing of the particles after the precipitation is used is formed will.

According to the invention, this object is essentially achieved by a device for separating solid particles from one Liquid dissolved, which has a container with an interior, a first drainage screen, which the interior in an upper

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- 2 - 24T6839

and dividing a lower chamber, a device for feeding a mixture of solid particles and a liquid on one end of the drainage screen, an overflow that is attached to is located at the other end of the drainage screen and allows the controlled passage of the particles through the overflow, devices for drawing off the liquid from the lower chamber of the interior space after the. Passage through the sieve and devices for generating a vibration of the container for a movement of the Solid particles along the drainage screen and through the overflow.

The container can be provided with a second interior space, which is arranged next to the first interior space and has a second drainage screen that divides the second interior space into an upper one and dividing lower chamber, wherein the overflow is arranged between the first and the second drainage screen and the solid particles move from the first to the second sieve, as well as having facilities for removing the liquid from our chamber of the second interior.

According to a further feature of the invention, the separating device a liquid spray device for washing the Have solid particles.

Further details of the invention are the following description two embodiments shown in the drawing. Show it

Figs. 1 and 2 longitudinal sections of a first embodiment

the separation device according to the invention in the vicinity of the side walls, while

3 shows a longitudinal section of a second embodiment

illustrates the separation device according to the invention.

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The device 1 for separating solid particles 2 with a spherical shape from a liquid 3 according to FIGS. 1 and 2 has a container 4 which divides the inside by an upright transverse wall 5 into a first and a second inner space 6, 7 that are arranged side by side. A first substantially flat drainage screen 8 divides the first interior space 6 into an upper and a lower chamber 6a, 6b. A second substantially flat drainage screen 9 divides the second Interior 7 io- an upper and a lower chamber 7a> 7b. The container 4 is with a feed line 10 for feeding a mixture of solid particles and liquids to a third, downward inclined additional sieve 8a provided at one end of the sieve 8. One end of the transverse wall 5 is cut off so that a Overflow 11 is formed at the other end of the first screen 8 and between the adjacent parts of the screens 8 and 9 is arranged and the controlled passage of the solid particles 2 from the first interior 6 to the second interior 7 enables. Outlets 12, 13 serve to remove liquid from the lower chambers 6b, 7b of the first and second interior spaces 6.7. Ej.n oscillator 14, which is connected to the container 4 via a rod is connected, sets the container in an oscillating movement taking place in an essentially horizontal plane in such a way that that the solid particles 2 along the first grid 8 (FIG. 1) and move the container through a second overflow 16 over the overflow 11 and along the second sieve 9 (FIG. 2) and leave an outlet 17.

The overflow 11 projects a little over the sieve 9. The overflows 11, 16 allow the particles 2 to prevent passage but the passage of liquids with the solid particles. The sieves 8,9 are made of wire mesh, the Sieve enables the free drainage of liquid without the passage of solid particles 2. The sieves 8,9 are concave upper surfaces to support the drainage of the liquid ■ speed and are attached to box-like supports 18, 19, which are fitted with a sliding fit between the walls of the container 4,

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the first transverse wall 5 and the second transverse wall 20 are used are.

As illustrated in FIG. 2, the device 1 is provided with a spray device 25 for spraying washing water onto the Equipped solid particles 2 while they move on the sieve 9 along. The washing device consists of one Spray head 26 which is supplied with washing water via a line 27.

When operating the separation device, a mixture of Solid particles 2 and liquid 3 through the supply line 10 passed on the inclined downwardly inclined sieve 8a, while the container 4 backwards and forwards into a Oscillating movement is offset, as indicated by the arrow 28.

While the solid particles are supported by the oscillating movements of the container 4 slide down the sieve 8a, most of the liquid 3 runs through the sieve into the chamber 29 below the same and leaves the chamber an outlet pipe 30. The oscillating movement of the container 4- allows in addition, a slight shaking movement of the spherical particles 2 along the essentially flat sieve 8, such that the solid particles "flow" over the overflow 11 like a liquid onto the grid 9. The liquid is now running. 3 continuously through the sieve holes of the sieve 8a. As soon as the particles are on the sieve 9, they move Particles on this grid in the opposite direction to the particles .2 on the grid 8 along. Eventually the cross in motion Particles 2 located in the second overflow 16 like a liquid and leave the container 4 through the outlet 17. The solid particles are washed beforehand by the spray device 25.

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The mixture of liquid 3 and washing water that is collected in the lower chamber 7b after draining through the sieve 9 leaves the chamber through outlet 13.

Fig. 3 shows a second embodiment 31 of the invention Device for separating solid particles 32, which form spheres precipitated as a gel, from a liquid 33 » namely water. A first drainage screen 38 is provided with a Angle of inclination of at least 10 ° and preferably 15 ° to the horizontal in an interior of a container 34- arranged and divides this into an upper and a lower chamber 35, 36. A supply line 39 is used to supply a mixture of Solid particles and liquid on an additional drainage screen 371 which has a slope angle of at least 60 to the Is arranged horizontally, with the additional grid 37 directs the mixture onto the upper end of the first sieve 38. The sieves 37,38 consist of framed wire mesh, which is supported by support rods, not shown, which are arranged in a suitable manner is held. At the lower end of the first screen 38 there is an overflow 40. Outlets 41, 42 serve to drain the Liquid from the bottom of the container 34 and an outlet 43 to the Drain the dehydrated solid product. A hammer vibrator 44 is screwed directly to lugs welded to the container 34, to allow maximum energy transfer to the container 34. Guide plates 45,46 made of short metal strips, which are attached below the sieve 38 prevent liquid from sticking to the sieve.

During operation, a mixture of solid particles 32 and liquid 33 is fed to the with a Steeper pitch angle arranged sieve 37 slides. Larger amounts of liquid flow from this through the outlet 41. Under the action of the vibrator 44, the solid particles move along the sieve 38 to the overflow 40 and the Finished product outlet 43, with the greater portion of the liquid is withdrawn through outlet 42 and discharged. The liquid located below the sieve 38 is through the Guide surfaces 45,46 derived, thereby preventing the

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Liquid reaches the area of the overflow, where it is drawn back to the separated solid particles could. This would affect the effectiveness of the separation required for separating water from excreted as a gel spherical particles are fully sufficient, which then · through a solvent extraction is to be dried.

The device described is for general use in the separation of spherical solid particles from a liquid in which the particles are dispersed through the choice of sieves made of chemically compatible material a corresponding sieve fineness. The device is suitable for the separation of solid particles, the radioactive Contain materials, it is desirable to keep the stagnation of the solids as low as possible.

Patent claims

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Claims (6)

74-021 Pü / G "5 APR. 1974 patent claims 1.1 Device for separating solid particles from a liquid, characterized in that it has a Container (4) has, with an interior (6), a first drainage screen (8) which divides the interior (6) into an upper and lower chamber (6a, 6b) divided, a device (8a) for supplying solid particles (2) and liquid (3) one end of the grid (8), an overflow (11) which is arranged at the other end of the grid and a regulated one The passage of the solid particles (2) allows devices (12) to draw off the liquid (3) from the lower chamber (6b) of the interior (6) after it has drained through the sieve (8) and a device for generating an oscillating movement of the container (4) in such a way that the solid particles (2) move along the sieve (8) and over the overflow (11). 2. Device according to claim 1, characterized in that that the device for feeding a mixture of solid particles (2) and liquid (3) to one end of the first drainage sieve (8) has an additional downwardly inclined drainage sieve (8a). 3. Apparatus according to claim 1 or 2, characterized in that a second interior space (7) in the container (4) is provided which has a second drainage screen (9) which divides the second interior space (7) into an upper and a lower one Chamber (7a, 7b) divided, and that the overflow (11) between the first and second sieve (8,9) is arranged, wherein the solid particles (2) from the first sieve (8) to the second Move sieve (9), and that a device (13) for drawing off the liquid from the lower chamber (7b) of the second interior (7) is provided. 409842/0901 4. Apparatus according to claim J _5, characterized by a spray device (25) for spraying a liquid onto the solid particles (2) on the second drainage sieve (9). 5. Device according to one or more of the claims "to 4, characterized in that the first drainage sieve (8) and an optionally present drainage sieve (9) have a concave upper one Have surface to support the drainage of the liquid. 6. Apparatus according to claim 1 or 2, characterized in that the first drainage screen (38) with an angle of inclination is arranged at least 10 ° to the horizontal and that baffles (45) attached to the underside of the first screen (38) to prevent liquid from sticking underneath the first screen (38). 7 · Device according to one or more of the claims to 6, characterized in that the additional drainage screen (37) with an angle of inclination of at least 60 ° to Is arranged horizontally. 409847/0901