Patent RU-94020358-A (RU)
Inventor: SLOBODJANIK I P
IPC: B01D3/20
Filed: 1994-05-31
Abstract: FIELD: mass exchange columns, gas (vapor)/fluid interaction, gas absorption, rectification, washing, especially vacuum rectification; may be applied in chemical, oil chemical, gas and other industries. SUBSTANCE: contacting plate includes horizontal circular outward-flow slab perforated with arch-shaped slots. Convex of a slot is facing upward. The plate includes also drain and downflow pipes, guide vertical curvilinear members stocked onto the slab. Plates are arranged along height of vertical cylindrical column. Drain pipe is installed in the center of outward-flow slab in such a manner that its lower edge is spaced from the slab by a value of one forth internal diameter of drain pipe. Curvilinear member on the outward-flow slab is made in the form of spiral of Archimedes coming from the circle in the center of the slab. Spiral of Archimedes joins column wall at the periphery of outward-flow slab. Openings are originated in plate slab between column wall and spiral of Archimedes in the point where the spiral joins column wall. Downflow pipes are built into the openings. Total cross section area of all the downflow pipes is equal to cross section area of drain pipe in the center of the slab. Level of upper edges of downflow pipes is lower than upper edges of spiral of Archimedes. The highest position of pipe edges being the closest one to the point where spiral of Archimedes joins column wall. The lowest position of pipe edges is characterized for position spaced at the longest distance from point of joint. Axes of arched slots on the outward-flow slab are directed at acute angle to tangents to spiral of Archimedes towards the side where center of spiral of Archimedes is placed towards the direction from the center to the periphery, from drain pipe to downflow pipes. Horizontal inward-flow slabs are placed between outward-flow slabs in the column. Curvilinear members in the form of spiral of Archimedes are placed with absolute symmetry in inward-flow slabs. Drain pipes are placed on the periphery of the slab. The drain pipes are downcomers from upper outward-flow slab and are used as lower parts of downflow pipes of outward-flow pipe. Lower edges of drain pipes are spaced from inward-flow slab by a distance being not less than one forth internal diameter. This distance is the shortest for the drain pipe that is the nearest to the point where spiral of Archimedes joins column wall. This distance is the longest for the pipe being spaced for the longest distant from joint point. An aperture is originated in the center of inward-flow slab. Drain pipe is built in the aperture. Level of the upper edge of this drain pipe is lower that of upper edge of spiral of Archimedes. Lower part of the pipe is used as drain pipe of lower slab. Inward-flow slab is perforated in the form of arched slots with convex facing upward. Axes of the slots point away from drain pipes, from periphery to downflow pipe in the center. Axes of the arched slots are at acute angle to tangents to spiral of Archimedes towards center of curvature of the spiral of Archimedes. New details are as follows: installation of spirals of Archimedes on inward-flow slabs, as on central slabs do; axes of arched slots on outward-flow slabs and inward-flow slabs point away from drain pipes to downflow pipes, and are inclined at acute angle to tangents to spirals of Archimedes towards curvature centers of spirals of Archimedes. EFFECT: improved gas (vapor)/fluid mass exchange at the expense of increased time of gas (vapor)/fluid contact, and fluid flow structure close to model of ideal in horizontal plane with completely agitated fluid through the height of contacting layer on the plate.