SU1058568A1 - Nozzle element for multistage vortex mass-transfer apparatus - Google Patents

Abstract

ELEMENT-ADJUSTMENTS OF THE MULTISTENDED VORTEX MASSIVE-EXCHANGE MACHINE, including a horizontal wedge-shaped section of the overflow pocket with a box, a sector disk and a liquid distributor attached to it, distinguishing and; the section is made with a bevel directed towards the movement of the gas-liquid phase, and is provided with a cutter located under it, and the duct is made triangular section.

Description

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The invention relates to chemical and adjacent c. It is used in industry and can be found in absorption and rectification processes. A multistage contact apparatus is known in which contact elements are attached to the walls of the casing and are made in the form of a horizontal box of rectangular cross section attached to it from one end of the inclined box and from the other to a semicircular glass with openings and a disk with a threshold placed under it. The contact elements form a screw channel for the passage of gas. The liquid is supplied through the slots in the cups, is thrown off by centrifugal forces of the swirling flow onto the wall. And through the boxes flows down onto the lower coil l. The disadvantage of the apparatus is that the semicircular cups reduce the I pass of steam and the liquid in the vapor flow is unevenly distributed. Contact elements for a vortex mass transfer are also known, in which the horizontal section of the overflow pocket is wedge-shaped and provided with a radial distributor of liquid instead of semi-circular glasses, which increases the flow area and prevents distribution of liquid Yj .. However, the channel is long. the passage of gas is blocked by an inclined duct. The magnitude of this overlap exceeds the area of the lateral plane of the inclined duct. The side planes of the inclined and horizontal ducts located across the gas flow contribute to the appearance of secondary liquid entrainment. Liquid droplets, transported by swirling gas flow, and simultaneously, under the action of centrifugal force, pressed against the wall of the column, hit the side plane of the inclined duct, bounce back into the bottom flow and carried away to the overlying coil. The film of the liquid transported by gas through the sector disks to the receiving openings of the overflow pockets, strikes the lateral plane of the horizontal duct, is crushed, picked up by the gas flow and is also carried to the overlying turn. Thus, inclined ducts reduce the cross section s for the passage of steam, and the side faces of inclined and horizontal ducts lead to Nome second entrainment. The aim of the invention is to increase productivity and increase the efficiency of mass transfer. This goal is achieved by the fact that the nozzle element of a multistage vortex mass-exchange apparatus, including a horizontal wedge-shaped part of the overflow pocket with a box, sector disk and liquid distributor attached to it, has a horizontal wedge-shaped part with a bevel directed towards the gas-liquid phase, and provided with it is cut off, and the box is made of a triangular cross section. FIG. 1 shows a frontal view of FIG. 2 is also a top view, in FIG. 3 - also, side view; in fig. 4 - in isometric connection of the previous orbit with the element of the subsequent orbit of the vortex apparatus; in fig. 5 is a view A of FIG. 4. The nozzle element consists of a horizontal wedge-shaped section 1 with a slit-type radial distributor of liquid 2, a vertical box 3 of triangular cross section is attached to it, with the tip of an obtuse angle outward, open from above. A sector disk 4 made of sheet metal, grids or separate parts with radial or tangential gaps, an outer edge tightly adjacent to the column body, having powders 5 which enter the vertical box of the underlying element, and a hole 6 for connections with the underlying element. Horizontal wedge-shaped section is made with a bevel 7 and has a cut-off 8 with a nut 9, which is included in the vertical box 3 of the underlying pocket. The vertical duct 3 is provided with a sealing segment 10 to eliminate the flow of fluid between the duct and the wall of the column, two fastening brackets 11 with threads, one for connecting with the cutter of the overlying element, the second for connecting with the sector disk of the other upstream element. Additionally, the elements are fastened. Between themselves by means of connecting sleeves 12, the center of which coincides with the axis of the body of the column. The elements are installed in such a way that they form a helical step channel for the flow of gas. The aspect ratio of the vertical triangular duct is selected so that the flange b and c (Figs. 2 and 6) fits snugly to the column body, c1 the side a b is parallel to the side b of the vertical duct of the underlying element. The element works as follows. Liquid, filed in vertical boxes. The 3 upper pockets, flowing out through the slot radial distributors 2, are dispersed and taken up by the gas flow. The droplets in the swirling gas stream passing through the screw channel are affected by centrifugal force, which throws them to the wall of the column, where it falls into the receiving opening of the vertical box and flows down to the lower turn. Due to this movement of the fluid, a countercurrent flows through the device as a whole in the course of direct interaction On the turn and good contact when moving from the center to the wall of the body. Part of the liquid during the flight is launched onto sector disks, which travels in the direction of the vapor flow to the receiving opening of the vertical box.

The triangular shape of the box with the tip J of the oblique angle outwards allows the box to be installed vertically with an offset above and below: relative to each other, which leads to an increase in the flow area for the pair. And also allows you to eliminate re-entrainment, arising when droplets hit the side, side of the overflow ducts, in view of the fact that only a slanting impact is possible

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droplets transported, on the side surface a b of the duct (Fig. 5). As a result, all rebounded drops do not fall into the gas stream, but onto the wall of the column, where they are separated. The triangular cross-section allows the receptacle, the hole of the vertical duct, to extend beyond the separation space of the overlying vertical

0 box, which increases the perimeter of the drain, and this, in turn, facilitates the flow of fluid, which reduces the fluid level on the sector disk and reduces the secondary entrainment.

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A bevel at a horizontal wedge-shaped box excludes re-entrainment in the same way as a side ao in a vertical box. The cutter serves to direct the separated liquid to the receiving opening of the vertical box of the underlying element and to prevent liquid from flowing no; j the bottom of the element.

Thus, the increased flow area and reduced entrainment

5 of this element of the nozzle of a multistage vortex apparatus allows to increase productivity and increase the efficiency of mass transfer.

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Claims (1)

ELEMENT · NOZZLES OF MULTI-STAGE VORTEX MASS EXCHANGE APPARATUS, including a horizontal wedge-shaped section of the overflow pocket with a box attached to it, a sector disk and a liquid distributor, characterized in that, in order to increase productivity and increase the efficiency of the Mars exchange by reducing the splashing distance, the horizontal wedge-shaped section is made with a bevel directed towards the movement of the gas-liquid phase , and is equipped with a cutter located under it, 'and the box is made of a triangular section.