SU944615A1 - Apparatus for trapping aerosols - Google Patents

Description

one

The invention is intended to trap aerosols from gases and can be used in the technique of separating dispersed particles from gases and vapors.

A device for collecting dust is known by precipitating dust particles from air (gas) during condensation of water vapor p.

However, this device provides mainly inertial separation of particles to be collected, does not work efficiently enough and has large dimensions.

It is also known a device for trapping aerosols by using the phenomenon of diffusiophoresis, made in the form of a body, with two partitions placed in it, one of which is made porous and forms an evaporation surface, and the other is a condensation surface 2

However, in the known device, the channel through which the gas to be cleaned is passed is in the form of a flat slot, while the surface of the co-condensation is located at the bottom of the channel, which does not allow to increase the efficiency and productivity of cleaning due to the maximum approximation of the evaporation and condensation surfaces eliminating edge effects occurring in the flat channel and facilitating the output of the condensate.

The purpose of the invention is to increase the efficiency and productivity of cleaning, as well as ensuring the compactness of the device

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Claims (2)

The goal is achieved by the fact that the device containing the housing has means for inlet and outlet of the gas to be purified, two partitions, one of which is made porous and forms an evaporation surface, and the other forms a condensation surface, partitions are made in the form of vertically mounted coaxial cylinders Thereby, the partition forming the condensation surface is located inside the partition forming the evaporation surface. In order to prevent the overshoot of large particles of aerosol, but to provide a condenser designed as a labyrinth located coaxially. The drawing shows a device for trapping aerosols with the input of filtered gas into the temperature channel from above. The device contains a housing 1 in the form of a vertically mounted cylinder, in which two partitions 2 and 3 are coaxial to the sizeHbi. partition 2 serves as a condensation surface. Partitions 2 and 3 form a temperature channel k. In addition, the device is equipped with means 5 for introducing the gas to be purified into the permeable channel k and the means 6 for evacuating the purified gas. A condenser 7 is located in the lower part of the device in the form of a coaxially arranged labyrinth with unions 8 of the ophthalmic gas output and 9 of the condensate removal. The condenser 7 is cooled by means of a coil 10, through which the cooling liquid flows. The evaporation surface can also be made in the form of a humidified septum, heated either by an electric heater or by heating with a thermostatic fluid circulating in the jacket between the body and the partition. Various liquids can be used as a source of steam. such as water. The device operates in the following manner. The cleaned air (gas) enters through the means 5 for entering into the different temperature channel, channel k. Steam is supplied to the channel formed by the porous partition 3 and the body 1. Thus, the surface of the Partition 3 in the temperature channel {is the surface of evaporation. A cooling IDENTITY is supplied to the channel formed by the central partition, thereby forming a condensation surface on the channel side. By setting the temperature of the evaporating and condensing surfaces, one can obtain the desired values of temperature gradient and vapor pressure on the walls of the Thermal Canal C, In the condenser 7, in addition to the final vapor recovery, due to abrupt changes in the direction of movement of the gas being cleaned, those large droplets on aerosol contaminants that were not trapped in previous sections of the path. The purified gas exits through the nozzle 8, and the condensate through the nozzle 9. The present invention allows for the high-performance purification of gases from aerosol particles, regardless of their dispersion, concentration and nature. Claim 1. Aerosol trapping device comprising a housing, means for inlet and outlet of a gas to be purified, two partitions, one of which is made porous and forms a surface ;. evaporating, and another forms a condensation surface, which is such that, in order to increase cleaning efficiency and productivity, as well as to ensure the compactness of the device, the partitions are made in the form of vertically mounted coaxial cylinders, while the partition forming the condensation surface is located inside the partition, forming an evaporation surface. 2. The device according to claim 1, in accordance with the fact that the means for the removal of gas is provided with a capacitor made in the form of a coaxially arranged labyrinth. Sources of information taken into account in the examination of U USSR author's certificate No. 10l8i 3, cl. E 21 F 5/02, 1955. 2. Met sen A., Bobkowicr A. I.,. Cooke N.E., FarkasE.V. Theseparation of micronsIze particles from air by diffusJophoresls. - Can. I. Chem. Eng. ,, 1971, No. f, p. (prototype).