RU2401157C1 - Air dust filter - Google Patents

Abstract

FIELD: chemistry. ^ SUBSTANCE: filter has a housing with a dust collection tray, a connection pipe for inlet of dirty air and outlet of clean air. A filter cloth is suspended in the top part of the housing, where the said cloth is made in form of a conveyor belt worn on rollers and covered outside with long hair made from artificial or organic material. Opposite the bottom part of one of the rollers there is a scrapper placed over a settling chamber in which there is a group of vertical perforated metal plates with a vertical gap between them for formation of channels connected through an earthing bus. The dust collection tray is made in form of a pyramid-shaped bottom and is placed under the settling chamber. ^ EFFECT: more efficient air cleaning. ^ 3 dwg

Description

The invention relates to techniques for dust-free ventilation of industrial premises, in particular, to preliminary filters in a system of fine and ultrafine cleaning of atmospheric dust of air supplied to working rooms and protective shelters of enterprises of radio-electronic, radio-technical and other industries.

A device for cleaning air from dust (see RF patent No. 2022620, IPC B01D 46/10, publ. 11/15/1999), containing a housing with corrugated filter element, at the top of the corrugations placed rods with a certain step.

The disadvantage of this device is the difficulty of manufacturing the filter unit due to the presence of rods with a spring element to ensure constant tension of the working surface of the filter cloth.

A known filter for cleaning air from dust (see RF patent No. 2188063, IPC B01D 46/52, publ. 08/27/2002), comprising a housing with a dust pan for collecting dust, air supply pipes for cleaning and removal of purified air located inside the filter housing an element dividing the housing into dusty and purified air chambers suspended in the upper part of the housing in the form of a filter cloth.

The disadvantage is the relatively low dust collection coefficient - about 95%, which makes its use not always acceptable for "clean" radio-electronic and radio-technical enterprises, enterprises for the manufacture and testing of electronic products.

The problem to which the invention is directed is to increase the filter dust collection coefficient to 99 percent or more, through the use of the process of electrification of pollution particles, followed by separation of the sedimentation chamber in perforated metal plates.

The technical result of increasing the efficiency of air purification from pollution is achieved by the fact that the filter for dust air purification contains a housing with a dust collector, air supply nozzles for cleaning and removal of purified air, a filter element located inside the housing separating the housing into dusty and cleaned chambers air suspended in the upper part of the filter cloth housing, made in the form of a conveyor belt, worn on rollers and coated on the outside with a long pile of artificial or organic material, and opposite the outer part of one of the rollers, a scraper is mounted, mounted above the sedimentation chamber, in which there is a packet of vertical perforated metal plates with a height gap between them to form channels and connected to the ground via a bus, while the dust collection tray is made in a pyramidal bottom and is located under the sedimentary chamber.

Figure 1 shows a schematic illustration of a filter for cleaning air from dust, figure 2 is a section aa in figure 1, figure 3 is a view a in figure 1, the contact point of the scraper with a filter cloth.

The filter for cleaning air from dust consists of a housing 1 with a pyramidal bottom 2, equipped with nozzles for the entry of dusty and purified air, dust discharge 3, 4, 5, respectively, the inlet and outlet of blowing air 6 and 7, interconnected by air duct 8 with valve 9 inside which a cleaning chamber 10 is located from bottom to top with inclined guide strips 11 attached to the inner surface of the housing cover 1, a transport chamber 12 in which rollers 13 and 14 with sprockets 15 and 16 are placed, on which a conveyor belt is worn tape 17, coated on the outside with a long pile 18 made of artificial or natural organic material, attached to the housing 1 opposite the bottom of the roller 14, a scraper 19, placed above the pyramidal bottom 2 sedimentary chamber 20, in which is placed a package of 21 vertical perforated metal plates 22 located with gaps in height between each other, forming channels 23, and connected through the bus 24 to the ground 25.

The filter for cleaning air from dust works as follows.

Dusty air through the pipe 3 enters the cleaning chamber 10, striking against the inclined guide plates 11, turbulent with the formation of vortices and intensively contacts the pile 18 of the transport belt 17, moving due to the rollers 13 and 14 with sprockets 15 and 16 located in the transport chamber 12 . In this case, dust particles having a certain electric charge adhere to the surface of the pile 18, and air as a result of repeated contact with the surface of the pile 18, cleaned of suspended particles, is removed from the filter through the pipe 4. Tra The conveyor belt 17, having passed through the cleaning chamber 10 and turned through 180%, enters the precipitation chamber 20, at the entrance to which the pile 18 with dust particles adhering to it comes into contact with the scraper 19, as a result of which the electrically charged dust particles are shaken from it into the bag 21 and fall on the surface of the vertical perforated metal plates 22 connected via a bus 24 to the ground 25, where they are discharged and, under the action of gravity, gradually fall through the channels 23 into the pyramidal bottom 2.

In this case, periodically, as the dust accumulates in the bottom 2 and the surface of the plates 22 grows with fine suspended particles, the sediment chamber 20 is blown and the captured dust is removed from the bottom 2 by automatically or manually opening the dust discharge pipe 5 and supplying part of the purified air to the chamber 20 through the valve 9 branch pipes 6 and 7 through the gas pipeline 8.

The rotation of the rollers 13, 14 and the movement of the conveyor belt 17 can be ensured by the drive (not shown in FIGS. 1-3) or by the pressure of the moving cleaned air (if there is a sufficient excess pressure).

The originality of the proposed technical solution to improve the efficiency of air purification from fine contaminants in the form of dust and droplet liquid, i.e. the implementation of high-quality "fine cleaning" consists in the fact that the implementation of the filter cloth coated on the outside with a long pile of artificial or natural organic material allows more fully use the electrostatic method of processing a moving stream of polluted air, and the design of the sedimentary chamber in the form of filling it with perforated metal plates with channels and their subsequent grounding provides a dust collection coefficient of more than 99%.

Claims (1)

A filter for cleaning air from dust, comprising a housing with a dust collecting tray, nozzles for air inlet for cleaning and the outlet for purified air, a filter cloth suspended in the upper part of the housing, characterized in that the filter cloth is made in the form of a conveyor belt worn on rollers and coated outside, a long pile of artificial or natural organic material, and opposite the bottom of one of the rollers, a scraper is mounted, mounted above the sedimentation chamber, in which there is a package of vertical perforations oriented metal plates with a height gap between them to form channels, connected through the bus to ground, while the dust collection tray is made in the form of a pyramidal bottom and is located under the sedimentary chamber.

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