CZ398299A3 - Dust filter - Google Patents

Abstract

Dust filter to clean the air with dust (1) s lid (2), untreated gas supply, clean gas outlet dust removal equipment, which is also located in the tank (1) at the intermediate (4) and at least one, but usually more, filter cells through which the purified air gets into space of pure gas (6) where each filter cell is assigned a flushing air nozzle (11) and control air purification system for air pressure pulses, each flushing nozzle (11) being straight connecting the pressure space (13), and above the net space A common pressure chamber (13) is provided in the gas (6) it forms the lid (2) and the bottom (14), which also encloses the space gas (6) above.

Description

The invention relates to a dust filter, such as a hose filter, in particular to its pumping and valve arrangement. Dust filters of this kind are used to clean the conveyed air from dust and the like.

Recent Techniques

Dust filters are eg cartridge-candle filters or also hose filters. For example, the tubular filter is a dust separator with tubular-shaped filter elements which are, for example, of a needle felt or other woven fabric. The individual filter hoses are arranged in a common housing and form an uncleaned gas space. The filter hoses are releasably fastened to the corresponding interstices and, in a vertical configuration, are located on the upper surface between the bottoms of the clean gas space, which can be connected by a valve arrangement not only to the purge air duct but also to the clean gas duct to discharge the purified air. In the lower part of the housing or in the area of uncleaned gas, there is a heat exchanger that draws clean and clean air.

Hose filters of this kind are described, for example, in DE-ft-3939645.

or in DE-fl-4029994.

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The IJ Lacquer hose filter enters the uncleaned gas stream by passing uncleaned gas through the uncleaned gas to the outer wall of the filter hose so that dust particles introduced from the uncleaned gas are retained in front of the filter hose and the cleaned gas inside the filter hose rises upwards. gas to the clean gas line and restored is available again. Larger dust particles fall down in the uncleaned gas area and are transferred eg by a turnstile shutter to the bottom of the filter. The finer dust particles are collected first on the outer surfaces of the filter hoses and must be periodically separated, for example, by air purging (t i a to o i o i o u o u).

According to 1) E-A-4d 1 1 9B8, at least one filter hose is introduced into the non-purged gas space in the reed filter device, from which the cleaned gas is discharged, followed by cleaning the filter hose with an internal gas spray (Jet-fabric).

For cleaning there is also known a device for producing air pressure substances (1) 1 (-11-9012518). The device comprises a pressure tank having air pressure connections, and special angular diaphragm valves are mounted in the tank lining, onto which air pressure pipes connectable to a hose filter device are routed transversely by the pressure air pump.

According to DE-A-3045759, an air nozzle is provided at the open end of each hose filter, which is fixed and shaped.

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SUMMARY OF THE INVENTION

The invention now solves the task of simplified air filter dust cleaning and the reduction of construction costs for air pressure preparation. The problem is solved by providing a clean gas space as an air pressure pump.

As a result, the individual supply lines and control fittings can be further developed and there are air nozzles in the bottom between the clean gas and the uncleaned gas space, which are assigned to the filter elements which are individually adjustable. The lid works at the same time 1 as an air pressure pumpAssembly and maintenance is simplified when the flushing and air control fittings are omitted, but now a general air pressure supply is still required. The free space that is now available can be. optimally utilized, pepper. can be greatly reduced.

The filter housing comprises, as is customary, a supply line for supplying the dust-free gas, so that the uncleaned gas can be fed into the housing (uncleaned gas space) and hence to the filter elements. In the lower part of the uncleaned gas space, below the filter elements, there are dispensing devices for possible dust particles. The uncleaned gas space is separated from the clean gas space by a bottom floor. In the mezzanine, not only fixings for filter elements are located to clean the filter elements. 99 99 9 9 9 9 9 9 9 9 9 9 999 999

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99 999 999 99 99 baskets of filter elements. but also the bottom of the pump-air nozzles / valves.

The invention is described in more detail with reference to the drawing, which shows an example of a hose filter. In the drawing, FIG. 1 shows the upper part of the filter hose, partially cross-sectional, FIG. 2 between. 3 shows a schematic cross-sectional illustration of the filter basket fastening.

The filter hose has a cover 1 with a lid 2, a dust extractor (not shown) as well as an uncleaned gas supply. At the bottom 4, which separates the uncleaned gas space 5 from the clean gas space 6, the filter hoses 7 are fixed and rigidly fixed. The filter hose 7 is housed in the filter basket. 8 and the releasable fastening on the bottom bottom 4 is carried out by means of a tubular basket 9 and not explicitly by a known fastening means.

Another possible variant of the filter arrangement at the bottom 4 is shown in FIG. 2 below 1e of the drawn axes 10. The filter hoses 7 are vertically suspended and sprayed from the outside with dust air (pure gas) and the cleaned air is discharged axially through the filter hose 7 In order to clean the filter hoses 7, a shorter and stronger air pressure pulse is blown upstream of the flushing air nozzle 11 into the filter hose 7 at defined intervals of time or after controlling the differential pressure. The purge air nozzle is actuated by a solenoid valve 12, and each purge hose 7 is associated with a purge air nozzle 11. Solenoid valves 12 are associated with an unimaginable electronic control that allows for a variety of purge cycles. The air purge nozzles 11 are nipples arranged to the axis 10. The air pressure is generated in a common pressure chamber 13, which is located above the top of the clean gas space 6, is formed by a bottom 14 which divides the lid 2 from the clean gas space 6. The neck 15 is provided with a valve 15 in a manner known per se. The pressure chamber 13 is still under a blowing pressure of 0.5 bar.

By means of the arrangement according to the invention, the cross-sectional area of the filter 11 can be optimally distributed. The filter hoses 7 and the flushing air nozzles 11 can be arbitrarily divided, thereby reducing the required area and diameter of the cover 1, while the performance of the filter is comparable with the prior art. Conversely, with the same cross-section it can be. a plurality of filter elements are located. The number of parts to be assembled is reduced, better assembly is possible and the necessary costs are reduced. The outside purging air nozzles 11 are arranged to be protected from damage. The manufacturing cost of the bottom 14 is also reduced. Since the lid 2 must anyway be dimensioned for higher pressures compared to the state of the art, there is only a slight increase in costs.

The lid 2 is designed as a tilting bottom, but can also be formed as a semi-circle h.

The invention is not limited to embodiments. Filter cartridges and filter cartridges can also be used instead of filter hoses.

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List of relationships

- cover

- lid

- clean gas outlet

- lower mezidno

- space does not read gas

- clean gas area

- filter hoses

- filter basket

- tub basket

- axis

- flushing air nozzle

- solenoid valve

- pressure space

- upper mezzanine

- throat

Claims (1)

PATENT CLAIMS Dust filter to clean the dust from the air that forms the cover C1) with lid (2), inlet of uncleaned gas and clean gas outlet C3) and dust removal device also located in cover C1) on intermediate C4), at least one, but mostly more, filter elements through which uncleaned passes gas to the clean gas space C6), wherein a flushing air nozzle C11) with a purge control system is provided to the filter element, which allows air pressure pulses to be poured. by providing a common pressure chamber (13) between the cover C2) and the bottom dnem 14), which supplies the flushing air nozzles C11) with air pressure. Dust filter according to claim 1, characterized in that the flushing air nozzle is sometimes associated with an electrically controlled valve (magnetic valve (12)) or a pneumatically controlled valve (6). The claim 11, wherein the lid C2) is formed as a hinged bottom, after locally formed? and the likeDust filter according to; The filter elements are arranged arbitrarily in the cover (1) in the intermediate space C4). Dust filter according to one of Claims 1 to 4, characterized in that the filter elements are filter hoses (7), filter cartridges, filter cartridges and the like. Dust filter according to claim 1, characterized in that the lid C2J, the pressure chamber and the cover C2) form a single unit.