DEVICE FOR A LIQUID BY A LIQUID EXTRACTION Russian patent published in 2005 - IPC

FIELD: petrochemical industry; devices for a liquid by a liquid extraction.

SUBSTANCE: the invention is pertaining to the field of petrochemical industry, in particular, to a device for a liquid by a liquid extraction. The invention is dealt with a multiplate device for realization in a vertical column of multistage an extraction of a liquid by a liquid using a counterflow principle. The device contains: plates, and each plate after a fine setting in a column takes a horizontal position and is supplied with a seal ring, which adjoins the inside surface of the column; a perforated working area; a chordal up-going channel located on one side of a plate and a vertical bead retaining a liquid and surrounding the working area of the plate and spaced apart from the plate periphery closer to its center. The height of the upward directed bead is sufficient to retained a heavy liquid on a working area of the plate preventing is appearance on the edge of the plate, where a leakage downwards is possible because of availability of a gap between the edge of the plate and then inside surface of the wall of the column. The invention ensures more efficient prevention of the heavy liquid leakages through the tightness along the edge of the plate.

EFFECT: the invention ensures more efficient prevention of the heavy liquids leakages through the sealing-in along the edge of the plate.

6 cl, 5 dwg