DD142502A1 - PROCESS AND DEVICE FOR EFFECTIVE FABRIC AND OMACHINE EXCHANGE IN COLONS WITH DOUBLE CONTACT - Google Patents

Abstract

The invention relates to column apparatuses for fabric and Heat exchange. The aim of the invention is the effectiveness and Intensity of the substance and exchange of ions in these columns see below increase, in particular, the degree of exchange in the lower Loading range of horizontal cooking speed columns increased is to be solved »Through the invention, the task is solved, a cross» and countercurrent phase routing with a DC phase guide so too combine that over a larger load range high Ausfcauschgrade be achieved at reasonable pressure losses. This is achieved »by a part of the gas flow in the cross flow through a horizontal liquid flow is passed »being preferably creating a bubble regime »Another part of the gas flow is guided horizontally between floors, where he sprays liquid, preferably produces a drop regime and in co-current with sprayed liquid and torn out drops contacted. · 'The invention is applicable in the material converting industry » but mainly in absorption processes. - Fig.1 -

Description

Description of the invention

a) Title of the invention

, Process and apparatus for effective material »and heat exchange in columns-with double contacting

b) Field of application of the invention

The invention relates to a method and a device sum effective material and heat exchange in columns with double contacting. "The invention is applicable to primarily multi-stage material and heat exchange processes, especially in the stoffumwandelnden industry, but mainly in Absorptionsproζessen»

c) Characteristic of the known technical solutions

The hitherto known technical solutions for mass and heat exchange can be divided into four distinctive groups:

"1 * Columns with internals, in which the contacting in the bubble regime takes place with cross and countercurrent phase conduction (z _e B * bubble tray columns) · The halves are low gas velocities with mean pressure losses«

2 · Columns with internals, in which the contacting with a liquid film in the case of priority counterparts

current but also direct-current phase is carried out (z · B, Rieselblechkolonnen) * ^: In Die'sen method v / earth low pressure losses achieved, however, the gas velocities and liquid flow rates are limited.

3 · Columns with internals contacting in the droplet (PiIm) regime with direct current within a contact zone (ζ «B» High velocity columns) «High gas velocities in most cases result in very high pressure losses *

4e columns with internals _s in which the contacting takes place in differently designed two-phase regimes (ζ * B ₉ Performlcontaktbodenkolonnen) · The relatively high efficiency at low pressure losses must be paid in this group of columns by additional, mechanical means for deposition and thus by increased equipment complexity "Nevertheless, only low gas velocities are achieved with respect to the columns mentioned under point 3.

$,) Object of the invention

The aim of the invention is _s to increase the effectiveness and intensity of mass and heat transfer sov / ie the column dimensions and thus to reduce their assembly costs Fertigungsund or "while maintaining the column dimensions to increase the throughput"

e) Presentation of the essence of the invention

The object of the invention is to solve the problem of carrying out a cross and counter-stoma phase guidance in the columns mentioned under point "b" with a DC phase lead.

U! '·. -iÜ7 Ci: U. ^! 7 ⁽ m

turn ΰ t O ^

tion so that high Au3tauschgrade be achieved with a reasonable Beiastungsbereieh at reasonable pressure losses ·

This object is achieved in that the gas stream in the column at least temporarily decomposed into partial streams and a first predetermined portion of the gas stream is passed in crossflow through a horizontal flow of liquid and preferably produces a bubble regime while he contacted with the! Liquid and optionally off torn out the same drop

A second part of the gas stream is guided horizontally at a suitable speed between the trays. In this case, it sprays liquid by means of devices known per se, preferably produces a drop regime and contacts in direct current with sprayed liquid and drops torn from the liquid. Subsequently, the partial gas stream is separated from liquid entrained by means of known devices According to the invention, the ratio of the quantities of liquid which take part in the different regimes can be adjusted to an arbitrarily predeterminable value by means of variable internals It is possible to make the method according to the invention such that

1 "the liquid is sprayed exclusively and contacted primarily in cocurrent with the horizontally guided gas' partial flow and used the vertical partial gas flow for gassing and contacting a Flussigkeitsschicht flowing horizontally across the floors as a result of Yorabgescliiedener drops

2 · primarily the liquid flowing through the ground is gassed by the vertical partial gas flow, tearing it out of the same droplets that contact the horizontal gas partial flow «

A particular embodiment of the invention is that the vertical gas partial flow is introduced into the liquid by suitable devices in such a way that no positive or negative transport effects occur in the liquid layer.

Furthermore, it is advantageous if the partial gas streams and the liquids from both regimes are mixed in suitable tubes in order to carry out the concentration compensation required as a result of different contacting methods.

The process may be designed so that the liquid flow is rotated by 90 ° in the direction of the horizontal partial gas flow or in the plane. «

To carry out the method according to the invention, a device is used, according to the invention in addition to the Fülirungs-, storage and return devices for the horizontal liquid flow Uiulenk- and separation devices for the horizontal gas partial flow, including the drops are installed with Versprüheinrichtungen »To a special Embodiment, an inlet v / ehr be provided with variable height ^ which controls the ratio of the liquid quantities in both regimes «It is also possible that the bottoms have openings that staggered the respective required transport effect and the necessary aperture ratio, if necessary,»

β β

Finally, a particular embodiment consists in that the separating elements are arranged such that, even for the pail of a guide of the two flow regimes rotated by 90 °, the separated drops are collected in the same space as the liquid discharging from the bottom.

The advantages of the solution according to the invention consist on the one hand in the congestion associated with throughput rate increase of the column and on the other hand in the Nachbegasung of prematurely deposited drops, which leads above all to increase the degree of exchange in the lower load range for horizontal HGK ·

f) embodiment

The invention will be explained below using an exemplary embodiment. In the accompanying drawing show:

Pig, 1: Cut B-B Pig. 2: Cut C-C Pig * 3: Cut A-A.

The column consists of the horizontally arranged perforated trays (10) with the corresponding lateral height limits (11) and the drain weir (12), from the final separation (20), deflecting (21) and Versprüheinrichtungen (22) In the same viewing plane or rotated by 90 ° to each other are arranged. "Furthermore, formed by the arranged in a sheath (30) floors and other facilities return spaces (40) j which are completed by a bottom plate (31) β

The one-stage liquid is supplied via a

· II

Return chamber (40) fed to the column and depending on the load by the Versprüheinrichtung (22) in the form of drops in the horizontally guided gas partial stream registered * contacted with the same and is discharged through the separation devices (20) again ·

Prematurely deposited drops collect on the trays (10) and form a closed liquid layer, which is penetrated by the vertical partial gas flow and contacted with this, and are fed via the weir (12) flowing out the same liquid collecting space (41), in which collected by the separator liquid drops are collected «

If at high gas concentrations, due to the pressure loss, large reservoir heights occur in the recirculation spaces, the inlet opening (23) becomes active so that liquid is sprayed simultaneously and co-injected as droplets through the contact zone and liquid crossflows over the bottom In the contact zone, the mixtures and divisions of the horizontal or vertical flows and in the return space the mixing of the liquids loaded differently by the different phase guides will take place. These mixtures serve to equalize the concentration within one stage, so that there are no different driving forces when entering the next one Level are present «

Claims (2)

Ä-S I inventions sanspruoh Method according to one or more of the preceding points, characterized in that the liquid flow is guided in the direction of the horizontal partial gas flow or in the plane rotated by 90 ° « 2e apparatus for carrying out the method according to item # 1, characterized in that in addition to the filling, storage and return means for the horizontal liquid flow deflecting and separating devices for the horizontal gas part § i - Q - current _s including the straw that are installed with Versprüheinrichtungen ·. 2 # 1 · device according to item 2 ·, characterized in that an inlet weir of variable height is provided, which controls the ratio of the liquid quantities of the two regimes « Method according to one or more of the preceding points, characterized in that the gas streams and the liquids from both regimes are mixed in suitable spaces in order to carry out the concentration equalization required as a result of different contacting methods * 1 * 4 * Method according to one or more of the preceding points, characterized in that by suitable means the vertical gas partial stream is introduced into the liquid such that no, positive or negative transport effects occur in the liquid layer. 1.3 * Method according to Item * 1 «or I *"!., Characterized in that the liquid flowing over the ground is primarily gassed by the vertical gas Teilstrcm, wherein it tears out of the same drops i contact the horizontal gas partial flow · 1,2c ancestors according to point 1 "or 1 * 1 *, characterized in that the liquid is sprayed exclusively Y / ird and primarily in cocurrent with the. horizontal contacted gas partial stream and the vertical gas partial stream for gassing and contacting 'a horizontally flowing over the floors of the liquid layer 5-succession of pre-deposited droplets is used · 1 * 1 * method according to item 1, characterized in that the ratio of the amounts of liquid participating in the various regimes, is set by means of variable internals to an arbitrarily predeterminable value · A process for the efficient mass and heat exchange in double contact columns, characterized in that the gas stream is at least temporarily decomposed into substreams such that a first predetermined portion of the gas stream is passed crossflow through a horizontal liquid stream and preferably produces a bubble regime, wherein it contacts with the liquid and if necessary tears it out of the same drop, and that a second vorbestimniter portion of the gas stream at a suitable speed zv / ischen the soil is guided horizontally, wherein it sprays liquid by means of devices known per se, and preferably produces a drop regime contacted in cocurrent with sprayed liquid as well as drops torn from the liquid and subsequently separated by entrained liquid by means of devices known per se. 2. * 2 Device according to item 2. or 2.times.1, characterized in that the trays have openings which achieve the required transport effect and the necessary opening ratio, if necessary staggered. 2o3 · Device according to one or more of the preceding points, characterized in that the separation, baffles are arranged so that even for the! 'All of a 90 ° rotated leadership of the two flow regimes, the deposited drops in. the same space as the liquid flowing from the floor ". For this 1 page drawings