SU1346175A1 - Device for reaction heat-mass exchange apparatus and wet dust collection - Google Patents

Abstract

The invention relates to devices for the interaction of gas and liquid and can be used for cooling and wet gas cleaning from dust and absorbable components in the chemical and other industries. The aim of the invention is to increase the efficiency of gas cleaning due to the intensification of mass transfer. The contact device includes a housing 1, a pipe 2 supplying the gas to be cleaned, a pipe 3 of the outlet irrigating liquid to it, a gas pipe 4 of the gas outlet, a pipe 5 entering the irrigating liquid, a conical fairing b forming the terminal diffuser contact zone 8. The fairing is made with flange 9, under which is the bump 10, made in the form of a cone. The flared cowling is installed relative to the bump stop at a distance with the formation of a diffusive-diffuser channel 11. The irrigating fluid flows down the outer and inner surfaces of the flow cone, open from the inlet and outlet sides of the fairing 6, in the lower part is captured by the gas flow coming through the central baffle hole 10. Then, gas and liquid enter the confused-diffuser channel 11 formed by the outer side surface of the baffle 10 and the inner side surface of the fairing 6 from the flanges Coy 9 in the lower part. Here spraying of the liquid occurs and the formation of fine droplets with a developed contact surface. 1 h. item f-ly, 1 ill. i C /

Description

The invention relates to devices for the interaction of gas and liquid and can be used for cooling and wet scrubbing of gases from dust and absorbable components in the chemical and other industries.

The purpose of the invention is to increase the efficiency of gas purification due to the intensification of mass transfer.

The drawing shows the device, a longitudinal section.

The device includes a housing 1, in the lower part of which there is a nozzle 2 for supplying the cleaned gas, and a nozzle 3 for irrigation, a liquid for it, and in the upper part for nozzle 4 for the cleaned gas and a nozzle 5 for irrigating liquid. In the central part of the housing 1 a flow cone fairing 6 is placed, the outer side surface 7 of which forms with the inner side surface of the housing 1 an annular diffuser contact zone 8. The fairing b is formed with flanging 9 in its lower part, under which the baffle 10 is located. (conical) ring, the side wall of which can be made both with perforation and without it. The inner side surfaces of the flap 6 and the flanges 9 form an annular confuser-diffuser channel 11 with the outer side surface of the bump stop 10, which connects the cavity of the fairing 6 with the annular diffuser contact zone 8. Under the nozzle 5 of the irrigating liquid in the upper part of the flap b, sprinkler is placed made in the form of a cylindrical ring 12 mounted concentrically over the fairing 6 with the formation of an annular channel 13 to evenly distribute the flow of liquid flowing on the outer surface of the fairing B, and a cone 14 installed in the lower part of the cylindrical ring 12 and the upper part of the fairing b with the formation of an annular channel 15 for distributing the flow of liquid flowing on the inner surface of the fairing b. For the purpose of the most uniform distribution of both flows and their twisting in the channels 13 and 15, it is advisable to install guide vanes (not shown).

The device works as follows.

The irrigating fluid is fed through the nozzle 5 into the inside of the cylindrical ring 12, from where it is distributed through the annular channels 13 and 15 and through the guide vanes in uniform swirling flows on the outer and inner surfaces of the fairing b. After that, the irrigating fluid comes into contact in the lower part of the annular diffuser zone 8 with the gas to be cleaned, which enters the housing 1 through the nozzle 2 and is divided into two streams by means of the striker 10 - the main flow that bends around the outer

the surface of the bump stop 10 and the flange 9 of the fender b, and the auxiliary, entering the lower part of the internal cavity of the fender b through the central hole

in the bump stop 10.

In the lower part of the internal cavity of the fairing b, the capture of the irrigating liquid flowing down the inner wall of the fairing of b, an auxiliary gas flow occurs,

Q entering into this zone through the central opening in the bump stop 10. Gas and liquid enter the confusion-diffuser channel 11, where the spraying of the liquid and the formation of fine droplets with a developed contact surface occur. The gas-liquid5 bone stream leaves the confusion-diffuser channel at an angle towards the main gas flow and mixes with it in the narrowest part of the annular diffuser contact zone 8, where the most active zone is formed - the zone of high velocity of the total gas flow in which turbulent pulsations are generated conducive to intensive mass transfer and annular diffuser contact zone 8 not decaying over the entire height in the separation part of the device.

The perforation in the baffle 10 ensures that part of the liquid is recirculated upward along the inner surface of the baffle, thereby preventing the formation of solid deposits on it.

From the upper, segmental part of the device, the purified gas is discharged through the pipe 4, and the liquid stacks along the inner surface of the housing 1 is discharged from the device through the pipe 3.

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Experienced testing of the proposed device when collecting dust from the gas stream after the fluidized bed substance on the SPO shows that with an initial dust content of a gas stream of 10 g / m, the cleaning efficiency

 gas from dust is 99.3%. At the same time, the gas is cooled from 300 ° C to a temperature of reflux solution of 60 ° C. The concentration of circulating irrigating solution is adjusted to 36%. After seven days of continuous

No hard deposits on the surfaces of the elements of the contact device were detected from the work (inter-flush run of the dryer).

Claims (2)

1. A contact device for heat and mass transfer apparatus and wet dust collection, including a housing with inlet and outlet pipes, a sprinkler and a hollow conical fairing 55 with a large base downwards with a gap relative to the housing, characterized in that, in order to increase the efficiency of gas cleaning due to the intensification of mass transfer. 3 13461754 the fairing is made open from the side to form a confused-diffuser wavelet and exit, with flanging in its lower part. parts, fitted coaxially 2. The device according to claim 1, characterized in inside it is made as a cylindrical form of a conical ring placed 5th ring mounted concentrically large base down, but lower over the fairing, and a cone, setting part of the fairing with flanging installed at the bottom of the cylinder and at the top relative to the bump stop at the distance of the fairing.