SU515522A1 - Air purification method - Google Patents

Description

dust. After several expansions, when all the dust particles are filled with mist and the air J3 in the chamber becomes clean, the mist no longer forms on subsequent expansions. The formation of droplets in this method always begins on dust particles, since under these conditions they are condensation centers.

Since the process of expanding moist dusty air is adiabatic (very fast), at the time of supersaturation, heat exchange with the environment is practically eliminated, so that the nosvolist creates the necessary degree of supersaturation of the cleaned air volume due to jibi efficient condensation of moisture on the particles.

After adiabatic expansion, due to the influx of heat into the chamber from the outside, water and vapors quickly condense on the dust particles and together with them precipitate. A few expansions are sufficient and in the chamber the tumma is no longer formed, the air in the chamber becomes transparent. According to this factor, it is possible to carry out automatic control and management of the regime and degree of air purification from dust.

The purified air is supplied to the working area, and a new portion of the dusty air is admitted to the chamber, where the cleaning process is repeated in the same way as it is. This makes it possible to increase the efficiency of the deposition of dust particles, including small fractions, to accelerate, and thus increase the cleaning performance, to use means of monitoring and controlling the air purification mode from dust.

Intense and almost complete separation of dust particles from the final volume of aerodisperse medium makes it possible to put this method as the basis for creating a highly efficient and accurate measuring device for determining the dust content of the surroundings.

One of the variants of the proposed method for capturing valuable components and cleaning from evaporating solid aerosol particles emissions of aspiration systems, for example, from crushing and batching compartments but preparing samples of valuable ores for analysis

metal content shown in the drawing.

Air with a high concentration of solids removed from the ventilation system through pipeline 1 enters the receiver 2, then through the controlled valve-distributor 3 into the chamber 4. With small adiabatic expansions in the chamber 4, the solid (dust) particles are intensively condensed and their loss in a special bunker 5. At the time of expansion in the chamber

control valves 3 and 6 are closed.

As all the solid particles condense and precipitate, the expansion cycle in the chamber is stopped, valve 6 and the fresh air from the chamber are opened to the atmosphere (or subsequent air exchange). Subsequently, all operations are repeated in strict accordance with the indicated scheme. The proposed method can be irimeen for cleaning air supplied to the cabins of drilling and excavator equipment operating in high dustiness conditions, for example, in open pit mining.

F o rm u l a i 3

The method of air purification from industrial aerosols by humidification, characterized in that, in order to increase the efficiency of sedimentation of solid particles from aerosols, the dusty humidified air is subjected to adiabatic expansion m

the ratio is 1.12-1.25,

where Vl - initially occupied by gas, gas volume,

V2 is the volume occupied by the gas after adiabatic expansion.

 g

J 6

V