SU360960A1 - METHOD FOR WET FLUORING OF DUST HOT GASES - Google Patents

Description

one

This invention relates to a technique for collecting solid particles from waste gases of chemical plants using wet dust collectors, such as foam apparatuses irrigated with circulating solution or water.

There is a known method for wet scrubbing of gases, in which dusty gases are directed upwards through a distribution grid irrigated with liquid.

The disadvantage of this method is the supersaturation of the solution, which leads to the overgrowth of the lattice and the walls of the foam apparatus by the deposition of salts.

In order to maintain a constant concentration of impurities in the irrigating liquid and eliminate incrustation, the gas is moistened when entering the apparatus to a relative humidity of 70-100% and supersaturated inside it by spraying small droplets of irrigating water in the gas stream of the torch, and to prevent fogging, water is sprayed wet gas to a particle size of at least 15-50 microns.

The drawing shows a scheme for collecting dust from hot gases using the proposed method.

The method is carried out, for example, in a foam apparatus consisting of a housing /, a pipe 2 for the entry of dusty gas, a gas distribution grill 3 serving to hold the foam layer 4, a pipe 5 for the exit of purified gas and pipes 6 and 7 for the entrance and exit of the circulating irrigating fluid.

The circulation of the irrigating fluid is carried out through a pipeline 8, equipped with a collecting tank 9, a pump W and a pipeline // to remove part of the solution

from the machine and then feed it to

production for salt extraction. For who;

Water losses in the foam apparatus use pipeline 12 connected to nozzles 13 and 14 by means of pipes 15 and 16. Pipe 17 is used only to fill the tank, or to feed it in an unsteady mode, for example, during the start-up of the installation. The proposed method is carried out in this way. Dusty hot gas, for example, from sodium sulphate drying equipment in a fluidized bed is fed to the nozzle 2 of the apparatus, where it is moistened by spraying with a spray liquid through the nozzle 13 to

relative humidity of 70-100%. The cooled wet gas is fed into the internal volume of the apparatus, where it is additionally moistened with irrigating fluid through the nozzle 14 and directed through the grate 3 to

absorption zone - foam layer 4 dl

the capture of solid particles and then emitted into the atmosphere through the pipe 5.

Subject invention

Claims (2)

1. A method for wet cleaning of dusty hot gases in contact machines, for example: in foam, irrigated with water or solutions, characterized in that, in order to maintain a constant concentration of impurities in the irrigating liquid and removing the incrustation, the gas is moistened when entering the apparatus to a relative humidity of 70-100% and supersaturated inside it by spraying small droplets of irrigating water in the gas flow of the plume. 2. A method according to claim 1, characterized in that, in order to prevent fogging, water is sprayed in a moist gas to a particle size of at least 15-20 microns. eight