RU165690U1 - JET FILM CONTACT DEVICE FOR HEAT AND MASS EXCHANGE PROCESSES - Google Patents

Abstract

Inkjet-film contact device, including parallel square drain cups with vertical walls open from its upper end and having drain slots for liquid from the lower end, staggered in both transverse and longitudinal sections, characterized in that the supports for drains are vertical partitions installed parallel and crosswise relative to each other, passing through the center of the drains and having slots designed to fit accordingly Enikeev downcomers, while in the bottom of the downcomers are made in the form of pitch circle segments, deflected in such a way that the flow cross section was directed at the surface of the vertical partition.

Description

This utility model is intended for carrying out heat and mass transfer processes in a gas-liquid system and can find application in the chemical, petrochemical, metallurgical, food and energy industries.

A contact device for mass transfer apparatuses is known, comprising a horizontal perforated web that has vertical sectioning partitions made to allow uniform distribution of fluid across the perforated horizontal web [see Patent RU 94163, B01D 3/22, 2009].

The disadvantage of the contact device is a narrow range of stable and efficient operation, as well as high hydraulic resistance to gas passage.

A contact plate for mass transfer processes is known, on which drain glasses having vertical walls are installed [see GB 1422131 (A), B01D 3/20, 1972]. The contact plate is divided by the corresponding support beam along its diametrical line into two sections of the plate. On each such section of the plate there is a corresponding series of parallel rectangular drain cups located perpendicular to the support beam. Moreover, between the drain glasses there is a bubble zone with plates of various designs. A row of drain glasses located in one section is staggered relative to another row of drain glasses located in the opposite section of the plate. In this case, the drain glasses are open from its upper end, and the lower end is provided with a plurality of liquid drain holes.

The disadvantage of the invention is the low efficiency and intensity of the ongoing mass transfer processes in the bubble zone. In addition, the contact plate, regardless of the type of contact devices installed, has a high hydraulic resistance, which is due to the need for a gas stream to pass through the liquid layer located in the bubble zone of the contact plate.

The closest in technical essence and the achieved result is a jet-bubbler contact device consisting of drain cups arranged in cross-section and longitudinal sections in a checkerboard pattern [see patent RU 156379, B01D 3/20, 2015]. Drain glasses have vertical walls, are open from its upper end, and the lower end is provided with a plurality of liquid drain holes. The glasses in each row are interconnected by a rod, while the distance between the drain glasses is equal to the width of the drain glass, that is, the drain glasses in the cross section are square.

The disadvantage of this contact device is the relatively low efficiency of heat and mass transfer processes occurring in the spaces between two adjacent drain cups, where the interaction of falling jets and liquid drops with an upward gas flow is realized.

The problem to which the claimed utility model is directed is to increase the overall efficiency of heat and mass transfer processes in a gas-liquid system by increasing the specific surface area of the phase contact and the heat and mass transfer coefficients in the spaces between two adjacent drain cups.

The problem is solved by the inkjet-film contact device, which consists of parallel square drain cups having vertical walls. The drain cups are staggered in cross and longitudinal sections, open from their upper end, and the lower end is provided with a plurality of liquid drain slots. Supports for drains are vertical partitions mounted parallel and crosswise relative to each other, passing through the center of the drains. Vertical partitions have slots designed to install the corresponding drain cups. In the bottom of the drain cups, petals are made in the form of circular segments bent so that the bore is directed to the surface of the vertical partitions.

The technical result of the utility model is to increase the specific surface area of the contact of the phases and the heat and mass transfer coefficients in the spaces between two adjacent drain cups in height, and, as a result, increase the overall efficiency of heat and mass transfer processes in the gas-liquid system.

The essence of the utility model is illustrated by the following drawings:

- in FIG. 1 shows the proposed inkjet-film contact device for heat and mass transfer processes;

- in FIG. 2 is a longitudinal section of an ink-film contact device.

The inkjet-film contact device consists of parallel square drain cups 1 having vertical walls necessary to maintain the liquid level inside the drain cups 1. The supports for the drain cups 1 are vertical partitions 2 having slots designed to install the corresponding drain cups 1 (Fig. one). Drain glasses 1 are open from its upper end, and bent petals 3 are made in the bottom in the form of circular segments, which are necessary for distributing the liquid over the surface of the vertical partitions 2 (Fig. 2).

The proposed inkjet-film contact device for heat and mass transfer processes works as follows.

The liquid through a plurality of bent petals 3, made in the bottom of the drain cups 1, is distributed in the form of jets to the vertical partitions 2 below. In this case, the liquid level is maintained on said drain cups due to the vertical walls of the drain cups. Due to the checkerboard arrangement of the drain cups 1, the gas coming from below has a zigzag motion pattern.

When the jets of liquid move along the surface of the vertical partitions 2, the liquid is distributed with the formation of a stable film flow. In this case, the flowing liquid film is in contact with the upward flow of gas. Further, the resulting film, colliding with the surface of the liquid inside the drain cups 1, creates a developed constantly updated phase contact surface, which is determined by the presence of relatively small gas bubbles in the liquid layer and a few dropping drops from the liquid.

In the proposed inkjet-film contact device, in comparison with the prototype, the specific surface area of the contact of the phases and the coefficients of heat and mass transfer in the spaces between two adjacent drain cups of height are increased due to the installation of intensifying elements in the form of vertical partitions. In addition, it is known that the film flow of a liquid is characterized by higher heat and mass transfer coefficients than atomization of a liquid. Therefore, as shown by conducted experimental studies to determine the mass transfer efficiency of cooling circulating water, the overall efficiency in the proposed inkjet-film contact device at operating conditions increased by 18.2 ... 47.5% compared with the prototype.

Thus, the increase in the specific surface area of the contact of the phases and the heat and mass transfer coefficients in the spaces between two adjacent drain cups in height in the proposed jet-film contact device leads to an increase in the overall efficiency of heat and mass transfer processes in the gas-liquid system.

Claims (1)

Inkjet-film contact device, including parallel square drain cups with vertical walls open from its upper end and having drain slots for liquid from the lower end, staggered in both transverse and longitudinal sections, characterized in that the supports for drains are vertical partitions installed parallel and crosswise relative to each other, passing through the center of the drains and having slots designed to fit accordingly Enikeev downcomers, while in the bottom of the downcomers are made in the form of pitch circle segments, deflected in such a way that the flow cross section was directed at the surface of the vertical partition.

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