SU1643031A1 - Mass-transfer apparatus - Google Patents

Abstract

The invention relates to the construction of mass-transfer apparatus of the horizontal type and can be used in the chemical industry. The purpose of the invention is to increase the efficiency of the apparatus by ensuring efficiency at high loads on steam and liquid. The mass-exchange apparatus includes a case with lids and partitions, branch pipes for inlet and outlet of phases, contact bubble elements, overflow and receiving devices in the form of transverse slots, alternately spaced 1–3 times the body radii. 4 il.

Description

 The invention relates to horizontal mass transfer devices and can be used in the chemical industry.

The purpose of the invention is to increase the efficiency of the apparatus by ensuring the efficiency of high steam and liquid loads.

FIG. 1 schematically shows an apparatus, a general view; figure 2 is the same, side view; fig.Z - the same, the execution in the PID package; figure 4 - contact safety element.

The device consists of a housing 1 with covers 2 and gas inlet nozzles 3 and a product outlet 4. In the housing 1 there are contact bubbling elements 5, on the surface of which, over a given trajectory, overflow 6 and receiving 7 devices are installed. The housing 1 is provided with a manifold 8 with openings 9 located coaxially with each receiving device 7, with a cervapation chamber 10 with an outlet nozzle 11. Guides 13 are installed on the inner surface of the housing 1 between the segmental partitions 12, the liquid is taken in the lower part through the pipe {14. The mass transfer apparatus can be made in the form of a package 15 in which the body 1 is connected with the subsequent body along a parallel horizontal axis.

Mass transfer apparatus operates as follows.

Through the nozzle 3 of the gas inlet, located in the lower part of the housing 1 of the apparatus, serves gaseous tray. At the same time, liquid reflux is fed into the collector 8, which through the openings 9 placed coaxially with each of the receiving 7 devices is directed to these devices, after which it spreads over the entire surface of the contact bubbling element 5. On the surface of the elements 5, overflow 6 and receiving 7 devices are placed , made in the form of transverse slots at a distance in the range from 1 to 3 body radii.

&

J

ABOUT

B

Oj

o w

If the step size is less than one radius of the housing 1, the flow resistance on the surface of the contact sparging element 5 increases significantly due to an increase in the velocity of the gaseous flow. When the pitch is more than three body radii, the thickness of the liquid layer significantly increases, which also leads to an increase in hydraulic resistance and a decrease in the efficiency of the apparatus at high loads on steam and liquid.

The process of rectification proceeds when bubbling a gaseous stream coming from the lower part of the apparatus body 1 through a layer of liquid reflux coming from the upper part of the apparatus body 1 to the surface of the contact bubbling elements 5 in countercurrent.

The first contact along the fluid, the bubbling element 5 is made in the distributor side, in which at least two receiving devices 7 are placed along the edges of the rectangle parallel to the smaller side. This predetermines the direction of fluid movement from the extreme receivers 7 only to the center. All other receiving devices 7. located between the extreme receiving devices 7 predetermine the direction of fluid movement from this device in both directions (back and forth) along the surface of the element 5.

In order for the element 5 to work effectively, the cross-sectional area of each hole coaxial with the extreme receiver must be 0.4-0.6 or the cross-sectional area of each hole located between these extreme holes. Consequently, in the extreme receiving devices 7, from the extreme openings of the collector 8, liquid reflux is fed in the amount of about 0.5 of the amount of liquid that is fed through each opening 9 located between the extreme openings 9. The gas at the exit from

the columns are additionally separated in the volume between the housing 1 and the Bive Bubbling elements to the volume of the separation chamber 10, where the dropping moisture separates

and through pipe 11 is retracted. Liquid reflux after mass transfer to the bubbling elements 5 flows into the lower part of the body. In order to ensure the removal of liquid from the lower part, the gas inlets 3 of the gas inlet are passed inside the housing. The bottom of the liquid is withdrawn through the nozzle 14.

To obtain separation products with a purity of (1-10 - 5-)% oxygen

Apply the mass-transfer apparatus in the form of a bag 15, where liquid reflux from the upper part is fed through the nozzle 14 to the collector 8 of the lower part of the bag:

Technical and economic calculations show that when implementing the invention, for example, in a gas separation plant, it was possible to place these installations in buildings of the old building, since the height of these installations is reduced by 3-4 times,

In addition, the amount of loose insulation is reduced by 10–15 tons, the labor intensity of the manufacture of distillation plates and the apparatuses is reduced by 2–5 times, and the metal consumption is also reduced by 1.5–2.3 times.

Claims (1)

The invention of mass transfer apparatus, including enclosing case with lids and partitions, cutting cabins for entry and exit of phases, contact barbotzhnig elements with overflow receiving devices, is also distinguished by the fact that, in order to increase the efficiency of the apparatus by ensuring performance under high loads a couple of liters of liquid, overflow and receiving devices are made in the form of transverse slots and are alternately placed 1-3 apart from each other body radii. FIG. 2 s ex J