Stage tray for mass exchange gas-fluid processes

FIELD: oil-and-gas industry.

SUBSTANCE: stage tray comprises horizontal belts inclined from column wall and arranged as steps from column wall to opposite wall to make the gap between overlying and underlying belts. Said belts have grate belts on the side extending from overlying belts and edge at the belt opposite side. Edge and grate belt planes are located in parallel and perpendicular to belt plane.

EFFECT: lower hydraulic resistance, higher mass exchange between gas and fluid, operation in the wide range of rates.

1 dwg

 

The technical field to which the invention relates.

The proposed plate refers to the mass transfer devices for absorption, desorption and rectification columns.

The level of technology

Known plate / tube sheet (I.A. Aleksandrov Distillation and absorption apparatus. M., 1971, Chemistry, pg.107), which is a perforated sheet with overflow devices. A disadvantage of this device is the large hydraulic resistance, instability.

The prototype is a cascade plate, in which the tapes are arranged horizontally and inclined toward the center of the column and have holes (I.A. Aleksandrov Distillation and absorption apparatus. M., 1971, Chemistry, p.123-124). A common feature of the proposed solution is the horizontal location of the tapes. The disadvantage of this design is the increased hydraulic resistance.

Disclosure of inventions

The objective of the invention is to provide a new high-performance plates for gas-liquid mass transfer processes.

Eliminate these drawbacks and achieve the claimed technical result from implementation of the plates for gas-liquid mass transfer processes, consisting of tape horizontally and parallel to each other, is due to the fact that the tapes are arranged in a staircase from one the th wall of the column to the opposite wall with the formation of cracks between the overlying and underlying tapes, tape is attached mesh tape side, protruding from beneath the overlying tape, and the curb on the opposite side of the belt, the plane of the border and grid parallel to each other and perpendicular to the plane of the tape.

The distinguishing feature of the claimed invention is that the tape 1 are in the form of a ladder from the wall of the column 5 to the opposite wall with the formation of cracks between the overlying and underlying ribbons, the ribbons are attached mesh tape 3 side, protruding from under the overlying tape and curb 2 on the opposite side of the belt, the plane borders 2 and mesh belt 3 are parallel to each other and perpendicular to the plane of the tape 1 (Fig 1).

Cascade dish consists of horizontal bands 1, located in the ladder, with the formation of cracks between the overlying and underlying ribbons for passing a gas (steam). Tapes have curb 2 with one of the parties. On the other hand to the tape 1 is attached mesh tape 3. The plane of the edge 2 and the mesh belt 3 are parallel to each other and perpendicular to the plane of the tape 1. In the projection is the overlap of one tape 1 on another tape as shown in figure 1.

The plate works as follows: the liquid comes to the plate through the overflow device 4 and the horizontal tape 1, as the stairs, coming down. Curb 2 is required for the button the liquid went towards gas (a couple of) in the gap between the belts, and grid tape 3 is designed for crushing flowing fluid stream, to prevent drift gas and to give direction to the gas flow. Figure 1 is a casing walls marked 5.

Advantages of this dish: low hydraulic resistance due to the large free cross section of the plate, a high rate of mass transfer between gas and liquid by breaking up the flow of the fluid mesh tape and due to the straight movement of gas and liquid on the tape 1, as well as through intensive interaction mode, low brythons through mesh tape 3, the possibility of working plates in a wide range of gas velocities due to the absence of a permanent layer of liquid on the plate.

As a result of implementation of the invention can be obtained the following technical result:

- reduction of hydraulic resistance,

- increase in the rate of mass transfer between gas and liquid,

- reduction of brythonic,

- expansion of the range of gas velocities.

Brief description of drawings

Figure 1. Cascade dish.

Figure 1 shows the construction of a new cascade dish.

The implementation of the invention

The invention is implemented in the column gas-liquid mass transfer apparatus, which is installed on top of each other a number of cascading cymbals. The liquid is fed through raspredelitel is a great device in the upper part of the column. The liquid on the plates moves cascade, and from one plate to another passes by flowing device 4. The liquid is discharged through a nozzle in the bottom the bottom of the column. Gas is fed through a fitting in the bottom of the column and moves up the column through the gap formed by the tape 1. The interaction between the gas and liquid occurs at the cascade plates.

Cascade plate for gas-liquid mass transfer processes containing horizontal strip, forming a slope from the wall of the column, characterized in that the tapes are in the form of a ladder from the wall of the column to the opposite wall with the formation of cracks between the overlying and underlying tapes, tapes have a grid tape side, protruding from beneath the overlying tape, and the curb on the opposite side of the belt, the plane of the curb and mesh belt parallel to each other and perpendicular to the plane of the tape.



 

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FIELD: process engineering.

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FIELD: process engineering.

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Contact device // 2446872

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Lattice column // 2097096
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Mass lattice column // 2093240

FIELD: petroleum industry; gas-processing industry; petrochemical industry; chemical industry; by-product-coking industry, power engineering; food industry; other industries; mass-exchange contact device.

SUBSTANCE: the invention is pertaining to the contact devices for the mass-exchange apparatuses intended for organization of the direct contacts of the steam or gaseous and liquid phases in the processes of rectification, distilling, absorption, desorption, and also the gas-washing operations used in the petroleum refining, gas-processing, in petrochemistry, chemistry, coke-chemistry, power engineering, food and other branches of industry. The mass-exchange contact device contains a body, an inclined plate, a fitting for a liquid drain from the upper plate onto the lower plate. At that the inclined plate consists of several parallel layers with several notches arranged on the supporting ring with the preset spacing intervals among them. The angle between the horizontal plane of the supporting ring and the outer side of the external layer of the plate is taken within the limits of from 90° up to 160°. The liquid draining from the upper plate onto the lower plate comes on that layer of the plate, which is the first getting in contact with the steamed or the gaseous stream, and the steamed or the gaseous stream comes through the layers of the plate in succession. At that the number of the layers of the plate should be no less than three. The layers of the plate can be crimped. At that the corrugation of layers may be executed on the whole or a part of the plate, and the angle between the horizontal plane of the supporting ring and the outer side of the external layer is determined by the line being tangential to the most salient part of the crimps. The use of the invention in the composition of the mass-exchange apparatus (tower) ensures the following advantages over the now in use mass-exchange apparatuses with a nozzle or with the horizontal plates: 2-3 times increased productivity of the apparatus at the similar with the indicated apparatuses efficiency.

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2 cl, 8 dwg

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