MIXING-SETTLING EXTRACTOR Russian patent published in 1995 - IPC

FIELD: separating materials. SUBSTANCE: transporting device 17, which is mounted over the length of settling chamber 4 below the level of top edge 10 of overflow threshold 9 so that its front end 19 is connected with flow passageway 16 and rear end 19 is positioned at distance 20 from the rear face wall 8 of settling chamber 4, is constructed as an assembly of axially alined identical members 21 and 22 mounted one inside the other. Outer member 21 of transporting device 17 encloses all remaining members, the member walls being spaced at the same distance. Settling chamber 4 is additionally provided with main cross baffle 27 having the opening, the baffle being positioned near the rear face wall 8 so that top edge 28 of baffle 27 underlies the level of top edge 10 of overflow threshold 9. Bottom edge 29 of baffle 27 and base 5 of settling chamber 4 define space 30. Rear end 19 of transporting device 17 is fitted in the opening of baffle 27 with interference. Members 21 and 22 of the transporting device can be round or diamond-shaped in cross-section. In the latter case, one of the diagonals of the diamond is vertical. Each of members 21 and 22 can be diverging in the direction from inlet opening 23 to outlet opening 24 so that areas of inlet openings are the same and areas of the outlet openings are different and increased in the direction of outer member 21. Inlet openings 23 of the members are shifted over horizontal axis at the same distance. The height of main cross baffle 27 is less than the height of outlet opening 24 of outer member 21. The members of transporting device, excluding outer member 21, can have openings 33 made at their top and bottom parts. Each member of the transporting device can have constant cross-section over the whole length and can be provided with openings 33 made at its top and bottom parts. In this case, branch pipes 34 and 36 are connected to opening 33 of outer member 21. The outlet section of the branch pipes project out of the level of top edge 28 and bottom edge 29 of main cross baffle 27 respectively. Outlet sections of branch pipes 34, which are positioned at the top part of outer member 21, underlie the level of top edge 10 of overflow threshold 9. Settling chamber 4 can be provided with additional cross baffles 36 the heights of which are different and lesser than the height of main cross baffle 27. Each additional baffle has an opening. The baffles are positioned inside the settling chamber so that the height of additional baffles 36 decreases from main cross baffle 27 to front face wall 7 of settling chamber 4. The centers of openings of all baffles 27 and 36 are arranged at one straight line. Transporting device 17 is also fitted with interference in openings of additional cross baffles 36. EFFECT: improved design. 7 cl, 8 dwg