Combined air cleaner

FIELD: process engineering.

SUBSTANCE: invention relates to devices for cleaning of air from aerosols and gas admixtures and can be used in vent systems of various industrial branches. Combined air cleaner comprises primary cleaning section and adsorption section. Primary cleaning unit is composed of electrostatic filter with filter element. The latter is made of porous nonwoven material including synthetic fibres of micron and submicron sizes that possess a dipole moment. Adsorption unit is composed of adsorption-catalytic filter element. Filter elements of primary cleaning and adsorption units are composed by cylindrical pipes fitted concentrically in common case. Note here that diameter of adsorption unit filter element is larger than that of primary cleaning unit filter element.

EFFECT: high-efficiency cleaning.

1 dwg

 

The invention relates to a device of combination of air purification from aerosols and trace gases and can be used in ventilation systems for various industries.

Known combined filters for air purification (see patent RU NO. 2248837, IPC 7 B01D 36/02, published 27.03.2005 G.; No. 2395326, IPC8B01D 36/02, B01D 50/00, published 27.07.2010.), containing successively installed in a common housing electrostatic and fabric filters.

In known devices to be cleaned, the air is pre-cleaned from dust in an electrostatic filter, and then click advanced in the fabric filter.

The disadvantages are large size, high power consumption, limited in scope.

Known installation combined filter for air purification (see patent RU NO. 85101, MPK B01D 50/00, published 27.07.2009 g) containing installed in the technological sequence in the course of the cleaned air flow unit primary coarse filter with filter elements in the form of porous membranes, the adsorption unit placed in the cavity housing the sorbent and adjacent to the adsorption unit unit final fine cleaning.

This device operates as follows.

Cleaned air through the inlet is introduced into the�setting, sequentially passes through the primary purification unit, the adsorber and the block end cleanup, after which the cleaned air through the outlet is vented to the atmosphere.

Known installation, providing effective cleaning of air from pollution of different kinds, has however several disadvantages, namely: require fairly frequent replacement (or cleaning) of the filter elements, difficult to maintain, because to change the filter elements, it is necessary to disassemble it into its component parts, requires a high degree of sealing of the interconnect, is long.

The objective of the claimed invention is the development of a combined compact device for air cleaning with high cleaning efficiency and is able to function long without maintenance.

Technical development results are consistently high quality of clean air, increasing the duration of the operating cycle between technical services, reduce the size of the installation.

The results of the invention are achieved due to the fact that in the combined air purification device containing the primary treatment unit and the adsorption unit, the primary treatment unit is an electrostatic filter with filter element made of porous neck�tion material, containing synthetic fibers of micron and submicron sizes, dipolar, block adsorption is an adsorption-catalytic filter element, filter elements primary treatment units and adsorption is formed as a cylindrical pipe and concentrically mounted in a common housing, wherein the diameter of the filter element adsorption unit exceeds the diameter of the filter element of the primary treatment unit.

As the material of the filter element of the electrostatic filter, the possible use of fibrous material obtained by extruding different types of polypropylenes, previously electrified by friction when passing through a die.

The essence of the proposed technical solution is illustrated in the drawing.

The device includes a housing 1 with holes for input 2 and output 3 of air, the primary treatment unit with node electrostatic charging 4 and filter element 5, the unit adsorption with adsorption-catalytic filter element 6.

The device operates as follows.

Of treated air through the inlet 2 is fed to the node electrostatic charging 4, where airborne particles passing through the corona discharge, charge. Further, the air flow from the unit of electrostatic charging is cool�dit through the filter element 5, in which the particles bearing the charge deposited on the fibers that possess dipole moments. Particles, which for some reason remained neutral after passing through the charging unit, deposited on the fibers of the filter element 5 due to a mechanical gear. Air, purified from the principal amount of impurities after passing through the filter element 5, is fed to the adsorption-catalytic filter element 6, the passage through which there is a final thin air purification from organic compounds and impurity gases, after which the cleaned air through the outlet 3 comes out from the device.

Ozone is generated in the node electrostatic charging 4, getting in the adsorption-catalytic filter element 6, is reacted with precipitated on the latest organic compounds and decomposes them into simple volatile compounds (carbon dioxide and water), decomposing itself. In addition, ozone generated in the node electrostatic charging 4, getting into the filter element 5, inactivates microorganisms that could together with solid particles to be detained on the filter element 5.

Thus, the proposed device the combination of electrostatic and adsorption-catalytic filter elements provides both Vysokoe�active air cleaning, and self-cleaning filter element adsorption unit. As a consequence, the proposed plant over long periods of time without replacement of the filter elements and maintenance.

In addition, due to the compactness afforded by the mutual location of the filter elements primary treatment units and adsorption, the device has small dimensions, which allows to expand the range of its application.

It should also be noted that formed in the charging node ozone, which is a threat to the health of gases, samarasekera on the filter adsorption unit, thereby increasing the safety of operation of the installation.

Combined device for purification of air containing the primary treatment unit and the adsorption unit, wherein the primary treatment unit is an electrostatic filter with filter element made of porous nonwoven fabric containing synthetic fibers of micron and submicron sizes, dipolar, block adsorption is an adsorption-catalytic filter element, filter elements primary treatment units and adsorption is formed as a cylindrical pipe and concentrically mounted in a common housing, wherein the diameter of the filter element �Loka adsorption larger than the diameter of the filter element of the primary treatment unit.



 

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