SU772572A1 - Regular packing for heat mass exchange apparatus - Google Patents

Description

(54) REGULAR PREPARATION FOR HEAT AND MASS EXCHANGE

one

The invention relates to regular nozzles of heat and mass transfer apparatus used in the chemical, petrochemical, pharmaceutical and other industries for carrying out rectification, absorption, chemical reactions and moistening processes.

The known regular packing for mass transfer apparatus, the packages of which consist of vertical corrugated sheets, the corrugations of which form in cross-section the composites of an oval or square shape 1.

A disadvantage of the well-known honeycomb structure is that the closed shape of the channels and their vertical direction prevent the redistribution of liquid and gas in the cross-section of the nozzle. The presence of open vertical channels allows the gas (vapor) phase to pass the pack of nozzle without sufficient mutual contact with the liquid, which reduces the efficiency of the nozzle.

A nozzle is also known, including vertically corrugated sheets assembled in a bag, the corrugations of which are arranged parallel to each other and directed to

APPARATUS

adjacent sheets in opposite directions 2.

A disadvantage of the known construction is the absence of redistribution of liquid and gas along the height of the channels, the presence of J stagnant zones in the vicinity of the corners of the corrugations.

The purpose of the invention is to increase the efficiency of mass transfer due to the redistribution of liquid and gas over the height of the pack of nozzles.

This goal is achieved by the fact that the corrugations in sheets of variable cross-section along the length of the channel are predominantly triangular in shape with a constant height, while the line of depressions between adjacent corrugations is at an angle to the line of vertices of these corrugations.

Moreover, the distance from the depression between adjacent corrugations to the tops of the corrugations is made with the ratio 1 / 3-1 / 5 at the upper edges of the sheet and 1 / 5-1 / 3 at the opposite edges.

In addition, the corrugated sheets are provided with alternating flat plates.

Claims (2)

FIG. 1 shows the proposed nozzle in axonometric projection for a package of one corrugated sheets; in fig. 2 is the same, but the corrugated sheets alternate with flat plates; in FIG. 3 - the shape of the channel formed by the corrugations. The nozzle consists of plates 1, collected in packages. Each plate is made in the form of corrugated sheets, the corrugations of which form channels 2, for example of a triangular shape, directed in adjacent sheets in opposite directions at an angle to the edges of the sheets. The distance from the depression to the top of the corrugations at the opposite edges is not the same in size. The heights of the adjoining corrugations provide a predetermined distance between the plates. The plates are assembled into bags, which are stacked in columns on top of each other with a 90 ° rotation. The nozzle works as follows. When gas (steam) is supplied from below, the nozzle channels are divided into multiple streams. Liquid is supplied from above to the end of the bag and is evenly distributed along the walls of the channels. The gas (vapor) encounters on its way, the liquid comes into contact with it, and heat and mass transfer takes place. Due to this design of the channels in the sheets, the redistribution of the velocity fields of the gas (steam) over the cross section of the channel and the overflow of the irrigating liquid from one plane of the channel to another due to their different inclination in the same section is achieved. The slope of the line of cavities to the tops of the corrugations allows irrigating the areas of the corrugations adjacent to the depression and eliminating the presence of non-wetted surfaces. Making the triangular channels so that the distance of the depressions at the edges to adjacent peaks is not the same in magnitude and is referred to as 1 / 3-1 / 5 at the upper edges and 1 / 5-1 / 3 at the opposite edges, it allows to obtain channels of different heights and accordingly, packs of nozzles of various free sections, and walls of channels of variable width along the length of the channels with variable inclination to the vertical plane. Due to the alternation of corrugated foxes, trvs with Trg plates in the package, nozzles form: 5 closed beam channels directed in opposite directions in adjacent sheets or zigzag along the height of the package, which allows adjusting the residence time of gas (steam) in the package of nozzles. Due to the fact that using the proposed nozzle, the distribution of liquid and gas (steam) across the height of the column is improved, and, consequently, the separation efficiency of the contacting phases increases without increasing the hydraulic resistance, it is most efficient to use the proposed nozzle when conducting rectification processes under vacuum . The nozzle can be made from both mesh and sheet metal and plastics. Its use in industry makes it possible to refuse the use of inefficient cellular packing and the Sulzer import packing in the columns. Claim 1. An adjustable nozzle for heat and mass transfer apparatus, including packaged vertical corrugated sheets, the corrugations of which are parallel to each other and directed in adjacent sheets in opposite directions, characterized in that, in order to increase the efficiency of mass transfer due to the redistribution of fluid gas (steam) along the height of the package nozzle, the corrugations in the sheets are made of varying cross-section along the length of the channel, mainly triangular in shape with a constant height, with a line of depressions between Single corrugations located at an angle to the line of vertices of these corrugations. 2. The nozzle according to claim 1, characterized in that the distance from the depression between adjacent corrugations to the tops of the corrugations is made with a ratio of 1 / 3-1 / 5 at the upper edges of the sheet and 1 / 5-1 / 3 at opposite edges. 3. Attachment on PP. 1 and 2, characterized in that the corrugated sheets are provided with alternating flat plates. Sources of information taken into account in the examination 1. French patent number 1026320, cl. On 01 D 53/20, 1959. 2. Patent of Great Britain, No. 1004046, cl. C 10 K, I960 (prototype). FIG.