SU770519A1 - Rapid-action direct-flow spraying scrubber - Google Patents

Description

The invention relates to the field of mass transfer apparatus and can be used in the chemical, petrochemical, food and other industries. five

A device for gas purification is known, which contains a venturi tube and an irrigation fluid chamber. Liquid is fed into the venturi confuser in the form of a film.

The closest to the invention to the technical essence and the achieved result is a high-speed direct-flow spray scrubber, comprising a housing with fittings for under-15 water and gas and liquid removal, a reservoir with a bottom for the liquid and a contact device made in the form of a Venturi pipe [].

The disadvantages of the known scrubber 20 are low intensity passing processes and significant hydraulic resistance.

In order to intensify the process of mass transfer due to an increase in the surface of the “25”: contact of the phases and reduction of the hydraulic resistance in the proposed scrubber, the tank is equipped with a horizontal perforated partition installed above its bottom.

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below the liquid level, and a compressed gas supply pipeline located under the perforated partition.

In addition, the scrubber is equipped with a closed vertical partition installed between the housing and the contact device and made with holes located above the level of the horizontal perforated partition. At the same time the horizontal partition is made of porous material.

The drawing shows the proposed scrubber, a longitudinal section.

The scrubber includes a housing 1, fittings 2 and 3 for supplying and discharging the reaction gas, 4 and 5 for supplying and discharging liquid, a contact device 6 made in the form of a Venturi tube, and a reservoir 7 for liquid formed by the walls of the body and the bottom 8. Between the level liquid and the bottom of the apparatus installed horizontal perforated partition 9, forming with the bottom 8 of the chamber 10, connected by a pipeline 11 with a source of compressed gas. In the tank between the housing 1 and the contact device 6 is placed a closed vertical ne3

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partition 12, limiting the area of the perforated horizontal partition (horizontal partition is located between the contact device and the vertical partition). The vertical partition has holes 13 placed upwards of the level of the horizontal partition (the chamber is thus limited to the bottom, which is perforated and vertical closed by partitions).

Scrubber works as follows.

Together with the supply of the reaction liquid and gas through the pipeline 11, compressed gas is supplied to the chamber 10 (this can be a precompressed part of the reaction gas or, for example, compressed air). The liquid enters the space between the vertical closed partition 12 and the housing 1 and then passes through 20 holes 13 into the subchamber zone of the tank 7. Compressed gas, passing through the perforations or pores of the horizontal partition 9, foams the liquid. The latter, in the form of foam, enters the contact device 6, overflowing over its upper edge. The presence of a gas-liquid mixture in the above-chamber zone, and in the zone between the vertical partition of the liquid body creates the effect of air-lift transport, which facilitates the supply of foam to the contact device.

The scrubber is operational even without the installation of a vertical partition with the placement of a perforated horizontal partition between the contact device and the housing.

The foam entering into the contact device interacts intensively with the reaction gas _and through the nozzle 2, the th force of a sharp increase in the contact surface.

In the presence of the supply of gas and liquid to the contact device and the construction of the invention, the foam transport

in the contact device, which dramatically reduces the resistance of the scrubber.

Tested apparatus of the proposed design on the system ammonia-water. The diameter of the neck of the device is 80 mm. The efficiency of ammonia absorption is higher than that of the film-irrigated Venturi scrubber, while reducing the resistance of the apparatus by 20%.

Claims (3)

Claim 1. High-speed straight-through sawing scraper, · containing a housing with fittings for supplying and discharging gas and liquid, a reservoir with a bottom for a liquid, and a contact device made in the form of a Venturi tube, which is designed to increase the mass transfer the contact surface of the phase and reduce the hydraulic resistance, the tank is equipped with a horizontal perforated partition installed above its bottom below the liquid level, and a pipeline for supplying compressed gas placed under the perfo partition wall. 2. Scrubber pop. 1, which differs from I in that it is provided with a closed vertical partition installed between the housing and the contact device and made with openings located above the level of a horizontal perforated partition. 3. Scrubber pop. 1, characterized in that the horizontal partition is made and porous material.