SU1674891A1 - Mass-exchange column contacting device - Google Patents

Abstract

The invention can be used to separate thermally unstable mixtures containing nonvolatile components by means of a distillation method. The purpose of the invention is to improve the quality of separation products 3d by adiabatic isolation of one of the fluid circuits and to eliminate gum formation. The device contains a plate of the device's caliper plate divided into two closed common walls c, within its height, a bubbling 3 and d (euzhnyu 4 zones) And on adjacent plates the drainage zone is located above (below) the bubbling hydrochloric contacting of the two liquid streams with common pogoyum pairs is carried out in two separate circuit of claim 2 | ly 2 yl fe

Description

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The invention relates to the design of contact devices for heat and mass transfer processes involving the alternate interaction of a common vapor flow with two immiscible liquid flows.

The purpose of the invention is to improve the quality of separation products by adiabatically isolating one of the liquid streams and also reducing the metal consumption of contact devices and simplifying their design. FIG. 1 shows a column with overflow contact devices. A longitudinal section in FIG. 2 is the same with contact devices.

The contact device is located in the case 1 of the column. It contains placed one above the other contact plates separated by barriers 2 into the bubble 3 and deaf (drainage) 4 zones. The cross section of the space above the bubble and deaf zones limited by the partition (or partition and housing) can be constant along the height of the partition. (cylindrical partition of FIG. 1) or variable (partition walls are made in the form of two truncated cones 5 and 6 with a common base of FIG. 2). The deaf zone of each plate is provided with a drainage device. The drainage channel 7 with a water seal 8 a is a bubbling one, which is a contact plateau of the flooded (Fig 2) or overflow (Fig 1) type. When using the overflow contact element, the bubbling zone is equipped with an overflow device representing the overflow channel 9 with a water seal 10 Under the bubbling zone the plates can be mounted the guiding elements 11 and the splash-catching elements 12 above

The device works as follows

Fluid flow that does not require adiabatic isolation is fed to the upper tray of a contact device with a peripheral bubbling zone. After contacting with steam into the peripheral barbable zone 3, this fluid flow enters the peripheral blind zone 4 of the underlying plate of the stack through the contact holes of the plate (Fig. 2). ) or through the overflow channel 9 with a water seal 10 (Fig. 1) From the peripheral blind zone 4 this stream is again supplied for contact with steam to the peripheral bubbling zone 3 of the underlying plate through the drainage channel 7 with the hydraulic lock 8 ohm contact of fluid flow at the peripheral areas about bubbler proceeds with the steam coming from cent

RELATED BARBON ZONES Liquid stream that is necessary to adiabatically isolate is fed to the upper plate of the contact device with the central bubble zone. After contact with the steam in the central bubble zone 3, this stream enters the deaf central zone 4 of the underlying plate of the stack through the contact holes of the plate (Fig 2)

0 overflow channel 9 with a water seal 10 (Fig. 1) From the central deaf zone 4 this stream is again supplied for contact with steam to the central bubbling zone 3 of the bottom of the plate through the drainage channel 7 sec.

5 water seal 8 Contact of the fluid flow in the central bubble zones occurs with steam coming from the peripheral bubble zones. Moreover, due to the use of guide elements 11 and

0 of the splash guard elements 12 (FIG. 1) virtually eliminates the mixing of the flows due to the failure of the fluid and its entrainment. For the same purpose, the space bounded by the partition 2 (FIG. 2) is performed with

In this case, the upper cone 6 serves as a guide element and the lower cone 5 serves to increase the cross section of the separation region.

The device was tested on an experienced

In the installation of a column-connected double-circuit rectification with a diameter of 400 mm, made of stainless steel. Bar, the tray zones of the plates were made in the form of a sieve with a hole diameter in the periphery.

5 Ryno zone 5 mm and in the central 10mm. The distance between the plates is 350 mm. The free section of the bubbling zones is 42% in the central part in the peripheral 4 4 7% Exhaustive and

0 replicating parts of the column with a diameter of 200 mm were equipped with a dummy type tray. In the column, butoxybuthenine was isolated from the circulating reaction mixture. Application of the proposed

5 devices allowed to reduce the residual content of n-butanol in the finished product from 18 to 10 May% of polymers from 20 to 12 May%

0So the use of the proposed contact device for mass transfer with the alternate interaction of two immiscible among themselves liquid streams with a common pa

5, due to the steady flow, in comparison with the existing structures, adiabatic isolation of one of the streams reduces resin formation and, as a consequence, improves the quality of the products obtained.

talloemnost device while its simplification.

Claims (3)

Claim 1. Contact mass-transfer device for alternately interacting two immiscible streams of liquids with a common steam flow, containing cascade located in the body of the column along its plate height, about one liter and so on. that, in order to improve the quality of the products obtained by adiabatically isolating one of the liquid streams, the base of each plate is equipped with a closed partition and has a deaf and bubbling zones, while on the upper base the bubbling zone is bounded by a partition and is located in its central part, and the deaf zone is located between the body and the partition and is provided with a drainage device, and on the underlying base the deaf zone is limited by a partition and is located in the central part under the bubbling zone of the overlying plate, and the bubble zone is located under the drainage device of the blind zone of the overlying plate between 10 case and partition. 2. The device is pop. 1. Distinguishing with the fact that the bubble zone is provided with contact elements of a failure or overflow type. 15 3. The device according to claim 1. About tl and ch yu e e so. that the zone limited by a partition is made with a variable section in height.