DE202009013103U1 - Cylindrical filter cartridge for a filter device for removing fine dusts from a dust-laden gas stream and filter device and filter system with selbiger - Google Patents

Abstract

Cylindrical filter cartridge (20) for removing fine dusts from a dust-laden gas stream, with
a cylindrical filter material (60) which separates a raw gas side from a clean gas side and can be flowed through by the gas stream, and
at least one support tube (50, 51) for supporting the filter material (60), wherein the respective support tube has openings, which are traversed by the gas stream, wherein
at a first end of the filter cartridge, a support ring (52) is provided for supporting the first end of the filter cartridge, in which an opening (21) is formed, through which the gas flow can pass into or out of the interior of the filter cartridge, and
a closure lid (37; 62) is provided for closing the second end at a second end of the filter cartridge opposite the first end;
characterized in that provided on the closure cap is an annular seal (69) and connected thereto to effect a sealed fit of the filter cartridge at the second end.

Description

Field of the invention

The The present invention relates generally to filtering devices for prefers continuous separation of finest dust particles (Suspended matter), in particular for use in dedusting dust-air streams, which are loaded with high-dose drugs, or generally For use with dust air streams with dangerous Dust, for example, toxic, carcinogenic, radioactive or other harmful dusts. Especially The present invention relates to a cylindrical filter cartridge for such filter devices and their use in Filter devices and filter systems of the aforementioned type.

Background of the invention

For this become filter systems with separation devices (filter cartridges) equipped, the Staubabscheideleistungen in the field of Filter classes according to EN1822 between H10 to H14 (HEPA) and U15 to U17 (ULPA). In addition, is from the state the art known to perform such filter systems so that the exchange of exhausted (contaminated) and contaminated Filter cartridges and also the collected dust for the operator is safe, ie contact and contamination-free, can be done.

filtering devices The aforementioned type usually consist of at least two successively arranged filter stages, the dust-laden Gas flow flows through the same flow direction become. The second filter stage is usually used as a downstream safety filter (static filter element), on the one hand to increase the dust separation and on the other possibly catching malfunctions of the first filter stage and the filter device with regard to impermissible residual dust emissions to secure in the environment.

Out The prior art also discloses filter systems which or multi-stage dust separation and where the first filter stage from a fabric or cartridge filter element or other filter element exists, however, the second filter stage as cuboid HEPA filter element, in particular filter cartridge is designed. The geometry of the filter cartridges of the first and second Level is thus different. A touch and contamination free Change of used filter elements of the two filter stages thus can not be accomplished with the help of the same changing device and procedure become.

Cylindrical filter cartridges are in the art for use as oil filters (see. EP1 379 318 B1 ), as an air filter for motor vehicles (see. EP 0 740 574 B1 ) and as a liquid filter (see. DE 100 38 412 A1 ) known.

The European patent application EP 07 123 995.8 Applicant discloses a cylindrical filter cartridge according to the preamble of claim 1. Generally, the cylindrical filter cartridge is dust-tightly supported at its two opposite ends against side walls of an associated filter chamber. At one end, at which an inlet or outlet is provided in and out of the interior of the filter cartridge, a support ring for supporting the end is provided against the side wall of the filter chamber. In this support ring a plurality of recesses are provided which cooperate with correspondingly formed locking claws of a clamping or locking mechanism to pull the support ring against the associated side wall of the filter chamber to clamp therebetween an annular sealing member and form the sealed seat. At the opposite end of the filter cartridge, a cap is firmly connected to the filter cartridge. To accomplish the desired sealed fit at the opposite second end, an outer edge of the filter cartridge clamps a ring seal against a ring attached to the side wall of the filter chamber. This construction makes reliable and safe installation of the filter cartridge in the filter system difficult.

Summary of the invention

task The present invention is a cylindrical filter cartridge to provide the aforementioned type, the simple and reliable used in an existing filter system and replaced again can be. According to further aspects of the The present invention is further intended to be a cylindrical filter cartridge the aforementioned type with an advantageous simple and inexpensive Construction be provided. According to further aspects The present invention is further a filter device and a filter unit with such a cylindrical filter cartridge to be provided.

These and further objects are according to the present Invention by a cylindrical filter cartridge with the features according to claim 1, by a filter device according to claim 16 and a Filter system solved according to claim 21. Further advantageous Embodiments are the subject of the referenced Dependent claims.

According to the invention, an annular seal, preferably made of an elastic material, such as plastic or rubber, provided on the closure lid on the cap and firmly connected thereto to effect the sealed seat at the second end of the filter cartridge. This facilitates the insertion and mounting of the filter cartridge in a filter system, since the seal must not be positioned and fixed in a separate assembly step.

A even more effective sealing at the first end of the filter cartridge can be achieved in an embodiment according to claim 2 because the annular seal on the outer circumference in the mounting position reliably against the annular Bridge can be pressed. Also in the delivery state the filter cartridge is the annular seal through the protected ring-shaped bridge.

One particularly advantageous simple construction of the filter cartridge leaves to realize according to claim 3. The annular profile piece may for example be L-shaped, with a Leg of the profile with the back of the cap is connected, for example glued or riveted.

Of the other leg of the annular profile can at a Embodiment according to claim 4 for supporting the outer support tube of the filter cartridge be used. This can, for example, with the leg of the Profils are glued or together in a provided at this end sealing compound for embedding the filter material in the cap be poured.

A particularly effective sealing and embedding of the filter material at the second end of the filter cartridge results in one embodiment according to claims 5 and 6. For mounting the filter cartridge just needs the potting compound in the annular Well introduced and passed. Then can the filter material to be fixed, the inner support tube and / or the outer support tube introduced become. It is particularly advantageous if the annular Bridge and the annular step the same height exhibit.

A further stiffening of the cap can at a Embodiment to be achieved according to claim 7. The circular Slice can be glued to the back or riveted with this be.

A particularly effective support of the inner support tube at the second end of the filter cartridge, in one embodiment can be achieved according to claim 8, since the support both at the annular edge web as well as at the stage of Cap can be done.

A particularly efficient sealing at the first end of the filter cartridge can be realized in an embodiment according to claim 9 become. The ring seal can in particular on the support ring be glued on.

at An embodiment according to claim 11, a stiffener the support ring in a particularly simple and efficient manner be achieved.

To Claim 12 can be raised peripheral edges of the U-shaped ring profile for supporting the inner or outer support tube of the filter cartridge be used. The support tubes can do this be glued to the peripheral edges or in between the potting edges introduced potting together potted with the filter material as claimed in claim 13. Particularly advantageous are the two raised peripheral edges of a U-shaped ring profile while the same height, which, for example a lapse of the potting compound in between these Circumferential edges formed annular recess facilitated.

at An embodiment according to claim 15 is on the closure lid a handling means, for example a handle or the like, provided, to handle the filter cartridge, for example, to grab or to twist. This handling agent may preferably also by a change bag are grabbed and handled and is part of the Filter cartridge, mounted together with the filter cartridge and is also disposed of again.

All in all comes with the cap on the second end of the filter cartridge a completely sealed, especially dustproof Realized seat, leaving more covers or cap on the filter system are basically not required.

According to the invention thus for the change of the cylindrical filter cartridges basically the same devices used or precautions to be met as to exchange the usually always cylindrical dust collector. Thus, you can According to the invention, the same contact and contamination-free bag-in-bag-out techniques be so easy and cost-effective disposal of spent filter cartridges is enabled. Is preferred while in the range of a removable closure lid of the housing a filter chamber a circulating change-bag retaining collar for contact and contamination-free change of a spent filter cartridge intended. Here are geometry and size of the Changing bag retaining collar preferred equal to the geometry and size a pipe fitting containing a dust collector for collecting the filtered-out dust with the filter device combines.

According to the invention at both ends of the filter cartridges a sealed seat causes so that the filter cartridges are fixed at both ends in the filter chambers and are sealed dust-tight. This will be easier in advantageous Way a reliable seal against the environment, but at the same time against the associated filter chamber, in the filter cartridges are arranged, accomplished.

As set out in more detail below the exclusive use of cylindrical filter cartridges a number of other advantages in operation and maintenance of two- or multistage dedusting systems. In particular, can be due to the use of cylindrical filter cartridges according to the invention a high, even filter effect with a compact and easy to maintain construction of the filter device. Other advantages arise because of a much simpler and more reliable Handling the cylindrical filter cartridges, especially when changing from used filter cartridges. In particular, according to the invention can be very short stand and / or maintenance times of the filter device during maintenance or replace used filter cartridges.

According to one Another preferred embodiment of the filter device The filter cartridges are in immediately successive filter stages flows in each reverse direction. By the Filter material of the cylindrical filter cartridges and the aforementioned Sealing at the ends of the filter cartridges become the filter chambers each in dust-laden half-rooms and pure-gas half-rooms divided. Depending on the flow direction of the gas flow, the means in relation to the filter material either from the outside directed inwards or inwards outwards, it comes for attaching the filtered dusts on the outer peripheral wall or inner circumferential wall of the filter material. Never will the filtered out Dust in two consecutive filter stages on the same side deposit the aforementioned half-spaces. This can be inventively for a simple and cost-effective cleaning of the filter cartridges be exploited because of the impact of pressure surges or in a countercurrent blowing effect dust coming from the Outside of one upstream or downstream located filter cartridge is cleaned, at best in the interior an upstream or downstream located Filter cartridge can get, but not on the outside.

According to one Another preferred embodiment of the filter device In this case, the filter cartridges in the first filter stage from the outside inside and the filter cartridges in the second filter stage of inside out, that is in the opposite direction, flows through.

According to one Another embodiment of the filter device are the Filter stages designed as separate filter chambers, in which both ends of the respective filter cartridges fixed and dustproof are sealed, with at one end of the filter cartridges for the gas flow unhindered access or exit into the or is provided from the interior of the cylindrical filter cartridges. This will easily defined operating conditions realized because the dust-laden gas stream can only through the filter material in the cylindrical peripheral wall of the filter cartridges, to be filtered. This allows in a simple manner the provision of dust-laden chamber areas to which are exposed to filtering raw gas, and thereof via the Filter material separated clean gas chamber areas, which is significant according to the invention Advantages for cleaning the filter elements and during operation and Maintenance of the filter device allows. For dustproof Seal are preferred sealing rings on the front pages or used at the periphery of the filter cartridges. According to another Embodiment, the filter cartridges are doing in the filter chambers both to a raw or pure gas side housing wall as also arranged sealed to the environment.

According to one Another embodiment of the filter device is at least one end of the filter cartridges a clamping and / or locking mechanism provided from outside the respective filter chamber Her contact and contamination-free operable is to the associated filter cartridge against a wall of the filter chamber to keep biased. In particular, find mechanical or pneumatic clamping and / or locking mechanisms application, from outside the filter device or from a Clean gas chamber can be operated forth. in principle can also remotely controlled electrically operated clamping and / or Locking mechanisms are used. Overall, thus allows a dust-tight seal at the respective end of the filter cartridges.

Preferably, such a clamping and / or locking mechanism cooperates positively with the associated end of the filter cartridges. In particular, on a frontal peripheral edge of the filter cartridges opposite the clamping and / or locking mechanism form-fitting structures, such as recesses or projections may be provided which cooperate positively with correspondingly formed form-fitting form, in particular locking claws or locking receptacles of the clamping and / or locking mechanism to the fix respective end to the associated wall. Preference is given between the frontal peripheral edge and the associated wall of the filter chamber an elastic sealing element held clamped to seal a filter interior against the associated filter chamber.

there can at the associated wall in the region of the sealing element a Dichtsitzprüfeinrichtung be provided, for example an annular groove which acts on an excess or negative pressure can be so that a meter a pressure drop or Pressure increase of the positive or negative pressure as an indication of can detect a leak.

LIST OF FIGURES

following the invention will be described by way of example and with reference are described on the accompanying drawings, from which provide further features, advantages and tasks to be solved become. Show it:

1 in a rear perspective view of a filter device according to the present invention;

2 the filter device according to the 1 in a perspective front view;

3 the guidance of the gas flow in the filter device according to the 1 ;

4 in a schematic sectional view of the fixing of a cylindrical filter cartridge according to the prior art in a filter chamber of the filter device according to the 1 ;

5 in an enlarged partial section with the upper end of the filter cartridge according to the 4 cooperating tensioning device;

6 in a perspective view of a cylindrical filter cartridge according to the prior art;

7 in a perspective view of the fixation of the filter cartridge according to the

6 in a filter chamber of the filter device according to the present invention;

8th the arrangement according to the 7 in a perspective front view;

9 in an enlarged partial section, the fixation of the bottom of the cylindrical filter cartridge according to the 4 ;

10 in a partially perspective view of a device for automatic cleaning of a cylindrical filter cartridge by pressure surges or blowing action in the countercurrent principle;

11 in a perspective rear view of a filter system according to the present invention with two filter devices according to the 1 ;

12a in a perspective rear view of a filter cartridge according to the invention;

12b in a perspective front view of a filter cartridge according to the present invention;

13a a plan view of the first end of the filter cartridge according to the 12a ;

13b a plan view of the second end of the filter cartridge according to the 12b ;

14a in a perspective partial section, the second end of the filter cartridge according to the invention;

15 a section of the filter cartridge according to 14 ;

16 in a perspective partial section, the first end of the filter cartridge according to the present invention.

In the figures denote identical reference numerals identical or essentially equivalent elements and element groups.

Detailed description of preferred embodiments

According to the 1 has the filter module 1 a first filter stage 2 and a downstream second filter stage 3 on, which are successively flowed through by the gas stream to be filtered. The two filter chambers 2 . 3 are over a divider 8th separated from each other and are from a front wall 6 , the lid 7 or separating plate 8th , the inner wall 5 of the dust collecting funnel 14 , of side walls, not shown, and of the rear partitions 9 limited. As detailed below, in the filter chambers 2 . 3 cylindrical filter cartridges 20 sealed dust-tight at the two ends and arranged in a horizontal orientation. In the rear partitions 9 are openings 12 designed so that the cylindrical interior of the filter cartridges 20 with the front of the filter chambers 2 . 3 arranged clean gas chambers 4 communicated. The module is on a rack 19 elevated. The first filter chamber 2 goes into a conical dust collecting funnel 14 over that via a pipe fitting 41 with a cylindrical dust collector 15 connected is. The entire filter module 1 is abge to the environment seals so that leakage of dust is prevented.

Below the filter module 1 is a storage container 16 arranged for compressed air or nitrogen, via lines 17 with in front of the mouth of the filter cartridges 20 arranged injector nozzles 18 connected is. The injector nozzles serve to clean the filter cartridges 20 by blowing action or pressure pulses according to the countercurrent principle. In the lower part of the filter module 1 The dust-laden raw gas passes over the inlet 10 and a dust settling flap in the dust collecting funnel 14 a, in which a guide plate (not shown) is installed, which separates already at inflow of the dust-gas mixture, a part of the dust in the dust collection container 15 down fills.

The dust-laden gas then enters the first filter stage 2 from outside to inside through the filter cartridges 20 through, flows through the interior of the cylindrical filter cartridges 20 and the openings 12 in the rear parting plate 9 in the lower clean gas chamber 4 , flows from there into the upper clean gas chamber 4 , then through the openings 12 in the rear parting plate 9 in the interior of the filter cartridges 20 the second filter stage 3 and finally flows in the reverse direction, that is, from the inside out, the filter material of the filter cartridges 20 the second filter stage 3 and then the second filter stage 3 through the clean gas outlet 11 to leave. Thus, the filter cartridges 20 in the first and second filter stages 2 . 3 flows through in the reverse direction. The 3 summarizes schematically the flow path described above. In principle, according to the present invention, the course of flow can also take place in the reverse order.

The 2 shows the filter module 1 in a perspective front view. Visible is the bottom of the cylindrical filter cartridges 20 through a sealing plate 37 covered and dustproof sealed to the environment and to the raw or clean gas side, as described in more detail below.

Further details of the fixation of the cylindrical filter cartridges in the filter stages 2 . 3 will be described below on the basis of 4 to 9 described. According to the 4 For example, a filter cartridge according to the prior art has a cylindrical centering cage 25 from a perforated sheet metal or a metal mesh of a suitable thickness, the filter material surrounding this cylindrically 20 supported. The filter material is basically carried out similar to known constructions. For example, can be used as a filter medium high-quality glass fiber papers with different Durchlass- or Abscheidegraden, which can be used as Vergussmasse example permanently elastic plastic. Of course, any other filter materials can be used, as will be readily apparent to those skilled in the study of the present application. At the two ends of the filter cartridge, however, special precautions are taken to dustproof sealing.

According to the 4 goes the filter material 20 at the front end near the mouth area 21 in an annular head piece 22 on the one hand, as a counter surface for a sealing ring 32 serves and in which, as in the 6 shown, teardrop-shaped recesses 23 are formed for receiving holding means. These holding means can be immovable on the partition wall 9 the filter chamber 2 be arranged, for example in the form of holding fingers, on which the head piece 22 is engaged in the manner of a bayonet closure during rotation of the filter cartridge. Preferably, as in 4 However, the holding means are shown as holding claws of a clamping and / or locking mechanism 27 executed.

According to the 4 and 5 has the clamping and / or locking mechanism 27 an actuating end, which is a cylindrical housing 28 connects, in which an axially adjustable rod 30 with a claw formed at the front end thereof 31 and a compression spring 28 are included. By actuating the operating end of the clamping and / or locking mechanism, the rod 30 with the claw 31 to the rear parting plate 9 the filter stage 2 deducted while the head piece 22 due to the positive engagement of the claw 31 against the rear baffle 9 drawn. This will do that between the rear baffle 9 and the head piece 22 located sealing element, namely the sealing ring 32 , clamped and the filter cartridge 20 against the rear baffle 9 held biased. In the mouth area 21 is thus the filter chamber 2 Dust-tight sealed against the interior of the filter cartridge. As will be readily apparent to those skilled in the art, the mechanical tensioning and / or locking mechanism described above may be used 27 be replaced by a pneumatic or in any other way operable mechanism.

Like in the 5 shown is to check the tightness of the seal ring 32 in the region of the rear-side separating plate 9 , Especially on an adapter ring for mounting the clamping and / or locking mechanism 27 , as a sealing seat tester an annular groove 33 formed, which is acted upon by an overpressure or underpressure, so that a leak by a pressure drop or pressure increase in the annular groove 33 can be detected.

According to the 4 and 9 is the filter cartridge 20 sealed according to the prior art at the other end against the environment. For this purpose, the other end of the filter cartridge 20 with a sealing plate 37 connected to which a sealing ring 36 is held. In the front wall 6 the filter chamber 2 is an opening for removing the filter cartridge 20 , in the 4 from the right, trained. If the filter cartridge 20 is inserted into the filter chamber, as in the 4 shown, this opening is through the sealing plate 37 closed and through the sealing ring 36 sealed. For clamping the sealing ring 36 is on the inside of the front wall 6 an inwardly inclined seal receiving ring 35 intended. By actuating the clamping and / or locking mechanism 27 This will be one end of the filter cartridge 20 as described above, against the rear bulkhead 9 drawn. At the same time this is the opposite end of the filter cartridge 20 with the sealing plate 37 and the direction 36 against the front partition 6 pulled and so causes a sealed seat at both ends. Thus, the serves in the 4 illustrated cover 40 not an actual seal of the filter chamber.

Based on 12a to 16 the structure of a filter cartridge according to the present invention will be described below. Basically, the filter cartridge according to the invention is compatible with that in the 4 to 9 shown conventional filter cartridge. So are in accordance with the 13a on the support ring 52 , Preferably at equal angular intervals to each other, three recesses 23 provided in cooperation with the above based on the 4 and 5 described clamping device serve a latching of the first end of the filter cartridge to a side wall of a filter chamber of the filter device. Radially outward of the recess 23 is on the support ring 52 an annular seal 55 provided from an elastic material, in particular glued. Furthermore, according to the 13b the opposite second end of the filter cartridge by a bottom part or a closure lid 62 covered dust-tight, on which a handle 66 is provided for gripping and handling of the filter cartridge, for example by means of rivets 68 riveted.

According to the 13b to 15 is the cap 62 stepped formed, with an annular support surface 63 , an axially and towards the interior of the filter cartridge extending stage 64 and a floor sunk in the axial direction 65 , The lateral extensions 67 of the handle 66 are on the support surface 63 riveted. On the back of the support surface 63 is an annular L-profile 70 provided, which is glued to the back, riveted to it or connected in any other way. The perpendicular in the axial direction of the rear protruding leg of the L-profile 70 limited a recess for receiving the potting compound 61 and at the same time serves as a radial support of the sealing ring 69 , Further, the outer peripheral surface of the outer support tube is also 50 on the inside of the perpendicular projecting from the back of the cap lid leg of the L-profile 70 supported. In particular, the support tube 50 on this leg 70 glued or by means of the potting compound 61 be connected to this.

According to the 14 is between the vertically projecting leg 70 and the axial step 64 an annular recess for receiving the potting compound 61 educated. Further, the inner circumference of the inner support tube 51 at the axial step 64 supported, for example glued to this or by means of the potting compound 61 connected. For sealing at the second end of the filter cartridge, the sealing compound 61 be introduced into this annular recess and smoothed. Subsequently, the introduction of the inner support tube takes place 51 , the filter material 60 and the outer support tube 50 , Finally, the potting compound 61 hardened.

According to the 14 is the sunken floor 65 by a sheet metal piece applied to its back 71 stiffened, wherein from the peripheral edge of the disc-shaped piece of sheet metal 71 axially and towards the interior of the filter cartridge a leg 72 protrudes, for further radial support of the inner support tube 51 can be used. The stiffening sheet 71 is on the back of the sunken floor 65 glued or with the help of several rivets 73 riveted. The 15 shows the structure of the filter cartridge at the outer peripheral edge of the second end again in a simplified partial section.

A similar construction is also provided at the first end of the filter cartridge, as in the 16 shown. For the formation of the support ring 52 are two annular U-profiles inserted into each other, so that the inner side walls 53 . 57 and the outer side cheeks 54 . 58 lie directly against each other. To connect the annular U-profiles, for example, an adhesive technique can be used. Opposite the support ring 52 and spaced from this results in an annular inner ring 56 of the bottom of an annular recess for receiving the potting compound 61 forms. By nesting and connecting the two annular U-profiles results in an advantageous stiffening of the support ring 52 , As in the 13a shown is on the support ring 52 a sealing ring 55 made of an elastic material, such as plastic or rubber, glued. According to the 16 are the inner side wall 53 and outer side cheek 54 pulled up in the axial direction of the filter cartridge, so that between these together with the annular bottom 56 an annular recess for receiving the potting compound 61 is trained. Like in the 16 shown serve the inner peripheral edge of the outer side cheek 54 and the outer peripheral edge of the inner side cheek 53 an immediate support of the outer support tube 50 or the inner support tube 51 , These can be glued in particular to the respective side cheek or by means of the sealing compound 61 be connected with these. To proceed with the assembly of the filter cartridge at the first end, as described above with reference to 14 described. First, in the between the raised side cheek 53 and 54 trained annular recording the potting compound 61 introduced and smoothed. Subsequently, the inner support tube 51 , the filter material 60 and the outer support tube 50 in the potting compound 61 introduced and then cured.

As will be readily apparent to one skilled in the art, have the inner support tube 51 and the outer support tube 50 a plurality of openings or perforations (not shown in the figures), through which the gas to be filtered can flow through unhindered. Appropriately, it is at the inner and outer support tube 51 . 50 around a perforated plate, for example made of aluminum or a precious metal. For mounting the filter cartridge can also first the inner support tube 51 pushed onto a mandrel, then the filter material 60 on the outer peripheral edge of the inner support tube 51 pushed on and then the outer support tube 50 , if any, on the outer circumference of the filter material 60 be deferred. Subsequently, at the two end of the support ring 52 (see. 16 ) or the Verschußdeckel 62 (see. 14 ) and connected as described above. Finally, the then finished filter cartridge is removed from the mandrel. Overall, this results in a particularly advantageous simple and inexpensive construction of the filter cartridge according to the invention. The inner support tube needs to have no bottom, (as in the 4 with the reference number 26 for the conventional filter cartridge shown). In principle, however, such a floor can also be provided in a filter cartridge according to the invention. According to a further embodiment, the inner and outer support tube may also be integrally formed, for example by deep drawing a perforated plate.

The filter cartridge 20 can be changed in the bag-in-bag-out known from the prior art bag-in-bag-out contact and contamination free. Details of the bag changer technology are disclosed, for example, in the company brochure "INFA-MICRON contamination-free cassette change", MKR, 8,200 / 1.94 of the Applicant, the contents of which are expressly incorporated herein by reference. More specifically, as in the 9 shown around the removal opening around a circumferential change-bag retaining collar 38 with two circumferential beads or grooves 39 intended. In operation, this change bag retaining collar 38 through a closure lid 40 be covered. After introducing the filter cartridge into the filter chamber, the insertion opening through the sealing plate 37 closed and then a plastic bag on the exchange collar 38 attached with the help of a rubber cord or a tension bracket, the or in the rear of the two beads or grooves 39 intervenes.

To change a spent filter cartridge is first the clamping and / or locking mechanism 27 solved. The retaining claws press 31 the filter cartridge 20 from the seal 32 and the gasket holder 35 path. Subsequently, the spent filter cartridge 20 by slightly turning out of the bayonet openings 23 be released and then pulled out into the plastic bag. The plastic bag can be used as a glove. Subsequently, the plastic bag is tied twice, namely on the one hand to the front groove 39 of the exchange collar 38 and on the other hand a distance from it. During the Abbindevorgangs the system is brought to negative pressure, so that the filter cartridge according to the principle of vacuum packaging tightly closed and space-saving packaging and no pollutants can get into the environment. The plastic bag is cut between the two places. The plastic bag with the used filter cartridge must be disposed of.

Then the bag residue is removed and the installation of a new filter cartridge. For this purpose, the rubber cord or the clamping bracket of the bag residue is transferred from the rear to the front groove of the exchange collar. The insertion remains closed by the hardened bag residue. A new plastic bag with the previously inserted new filter cartridge is in the now vacant rear groove of the exchange collar 38 fastened with a new rubber cord or tension bar. Then the sack rest including rubber cord or tension bar from the front groove of the exchange collar 38 pulled and brought in front of the new filter cartridge, the new plastic bag is used as a glove. The new filter cartridge is inserted into the filter chamber and by means of the clamping and / or locking mechanism 27 fixed, as in the 4 shown. It automatically becomes the headpiece 22 the filter cartridge 20 pressed against the sealing ring and at the opposite end of the sealing plate 37 with the sealing ring 36 against the seal receiving ring 35 pressed so that the filter cartridge is sealed dust-tight at both ends. Subsequently, the operation of the filter chamber is resumed.

Again 9 can be removed, the seal receiving ring is used 35 in cooperation with the filter cartridge 20 and the sealing plate 37 also a centering of the filter cartridge 20 in the area of the insertion opening.

The dusts may be partially flammable and explosive, so that additional explosion protection of the filter modules is required. This is inventively achieved in that the same at the same time serve as tensioned by train housing reinforcements against internal overpressure in pressure surges due to the special design of the filter cartridges on the front wall 6 or the rear parting plate 9 (see. 1 ), like the 4 can be readily removed.

The 10 shows the arrangement and supply of the injector nozzle 18 for cleaning a filter cartridge 20 , The injector nozzle 18 is within of a bottom or lid of the filter module, the baffle 8th (see. 1 ) and side walls of the filter module formed clean gas chamber 4 arranged, in the middle in front of the mouth 21 the filter cartridge 20 , The injector nozzle 18 is over a line 17 with a container for nitrogen or compressed air 16 or connected to a compressed air supply. To ensure continuous operation of the filter module, the filter cartridges 20 by pressure surges or by blowing action, exerted by the injector nozzle 18 , cleaned in countercurrent principle. In operation, the filtered out dust forms on the outer surface of the filter cartridge 20 in the first filter stage 2 a dust cake. Compressed air or a compressed air pulse from the injector nozzle 18 In a direction opposite to the flow direction of the gas to be filtered causes a release of the filter material from the Zentrierkäfig, which loosens due to deformation of the filter material, the dust cake, so that the dust particles on the dust collecting funnel 14 (see. 1 ) in the collection container 15 fall. Repeated application of pressure pulses causes expansion and contraction of the filter material, which accelerates the cleaning of the dust cake.

To change the dust collector 15 (see. 1 ), the bag changing technique described above is also used. For this purpose, the pipe fitting 41 also provided with grooves for receiving a rubber band or tension bracket. So that same tools both to change the dust collector 15 as well as to change the filter cartridges 20 can be used, geometry and size or dimensions of the change bag retaining collar 38 (see. 9 ) identical to the geometry and size or dimensions of the pipe connection piece 41 be.

The 11 shows one of two filter modules 1 formed as above formed filter plant 1' , The dust disposal takes place in each case in dust collection 15 , Alternatively, a central dust disposal may be provided, with a larger dust collector. For this purpose, different discharge elements can be arranged under each filter module. By pneumatic or mechanical conveyors any number of modules can be promoted to a central collection container.

By means of a central control device, such as CPU, and shut-off valves, the individual filter modules 1 optionally be taken from the gas stream to be filtered and switched back on. For cleaning or changing the filter cartridges 20 a filter module 1 this is first switched from the gas stream to be filtered. For cleaning, compressed air or compressed air pulses are sent via the injector nozzle to the interior of the filter cartridges 20 created. Because the filter modules 1 can be switched selectively from the gas stream, the sedimentation of the suspended matter during the purification can be carried out unhindered. In this state, the filter cartridges from outside the filter module 1 be changed as described above. Subsequently, the operation of the filter module 1 be resumed by switching on the gas stream to be cleaned.

The filter system according to the invention is suitable for continuous dedusting for air outputs of, for example, 500 m ³ / h to 30,000 m ³ / h for filter classes according to EN1822 of better than H10. As those skilled in the study of the above description will be readily apparent, the filter modules according to the invention can be assembled customer-specific in the modular principle. Thus, with comparatively low air outputs, the filter chambers can contain only one filter cartridge and two filter stages can be arranged one above the other. For larger systems, the individual filter chambers may contain two or more horizontally juxtaposed filter cartridges, as exemplified in the 1 shown.

1/1 '

Filter / dust removal

2

First Filter stage / -Kammer

3

Second Filter stage / -Kammer

4

Clean gas chamber

5

Inner wall of the dust collecting funnel 14

6

Front wall

7

cover

8th

Divider

9

rear-sided Divider

10

raw gas inlet

11

Rohgasauslass

12

opening

13

front cover

14

Dust collecting

15

dust collection

16

Nitrogen Storage / compressed air source

17

management

18

injector nozzle

19

frame

20

filter cartridge

21

mouth area the filter cartridge

22

headpiece

23

opening

25

Centering cage / cylinders

26

ground

27

prestressed or locking mechanism

28

casing

29

compression spring

30

pole

31

prestressed or locking claw

32

poetry

33

Dichtsitzprüfnut

34

Filter exchange opening

35

receiving ring

36

poetry

37

sealing plate

38

Changing Bag-retaining collar

39

Beading / groove

40

cover

41

Pipe Connector

50

outer support tube

51

inner support tube

52

front support ring

53

inner side cheek

54

outer side cheek

55

seal

56

inner ring

57

inner side cheek

58

outer side cheek

59

cavity

60

filter material

61

sealing compound

62

Bottom part / Verchlußdeckel

63

annular support surface

64

step

65

recessed ground

66

handle

67

lateral extension

68

rivet

69

seal

70

annular profile piece

71

sealing plate

72

Side cheek of the sealing plate 71

73

rivet

74

raised edge of the bottom part 62

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1379318 B1 [0005]
• EP 0740574 B1 [0005]
• - DE 10038412 A1 [0005]
• - EP 07123995 [0006]

Claims (21)

Cylindrical filter cartridge ( 20 ) for the removal of fine dusts from a dust-laden gas stream, with a cylindrical filter material ( 60 ), which separates a raw gas side from a clean gas side and can be flowed through by the gas stream and at least one support tube ( 50 . 51 ) for supporting the filter material ( 60 ), wherein the respective support tube has openings which can be flowed through by the gas stream, wherein at a first end of the filter cartridge, a support ring ( 52 ) is provided for supporting the first end of the filter cartridge, in which an opening ( 21 ) is formed, through which the gas flow can pass into or out of the interior of the filter cartridge, and at a second end of the filter cartridge opposite the first end, a closure lid ( 37 ; 62 ) is provided for closing the second end, characterized in that on the closure lid an annular seal ( 69 ) and connected thereto to effect a sealed fit of the filter cartridge at the second end. Filter cartridge according to claim, wherein the ring seal ( 69 ) an annular web ( 70 ) on the back of the closure lid ( 37 ; 62 ) encloses and / or is supported on this. Filter cartridge according to claim 2, wherein the annular web ( 7 ) of an annular profile piece ( 70 ) is formed, which is connected to the back of the cap.) Filter cartridge according to claim 3, wherein on the annular profile piece ( 70 ) further a support tube ( 50 ) is supported. Filter cartridge according to one of claims 2 to 4, wherein in the closure lid further comprises an annular step ( 64 ) and one to the interior of the filter cartridge ( 20 ) lowered ground ( 65 ) is trained. Filter cartridge according to claim 5, wherein in one between the annular web ( 70 ) and the annular step ( 64 ) formed annular recess a potting compound ( 61 ) for sealing the filter material ( 60 ) and the at least one support tube ( 50 . 51 ) is received against the cap. Filter cartridge according to claim 5 or 6, wherein with the back of the lowered soil ( 65 ) a circular disc ( 71 ) is connected to a to the interior of the filter cartridge projecting annular edge web ( 72 ), on which an inner support tube ( 51 ) of the filter cartridge is supported. Filter device according to claim 7, wherein the annular edge web ( 72 ) in extension of the stage ( 64 ) of the closure lid extends to the interior of the filter cartridge. Filter cartridge according to one of the preceding claims, wherein the support ring ( 52 ) at the first end of the filter cartridge ( 20 ) a ring seal ( 55 ) wearing. Filter cartridge according to claim 9, wherein radially inwardly to the annular seal ( 55 ) at equal angular intervals spaced from each other a plurality of recesses or grooves ( 23 ) for locking the filter cartridge 20 are provided at the first end. Filter cartridge according to claim 9 or 10, wherein the support ring ( 52 ) of two nested or interconnected U-shaped ring profiles is formed, between which a cavity ( 59 ) is trained. Filter cartridge according to claim 11, wherein peripheral edges ( 53 . 54 ) one of the U-shaped ring profiles to the interior of the filter cartridge ( 20 ) are extended. Filter cartridge according to claim 12, wherein in one between the peripheral edges ( 53 . 54 ) formed annular recess a potting compound ( 61 ) for sealing the filter material ( 60 ) and the at least one support tube ( 50 . 51 ) against the support ring ( 52 ) is recorded. Filter cartridge according to claim 12 or 13, wherein at the respective peripheral edge ( 53 . 54 ) further a respective support tube ( 50 . 51 ) of the filter cartridge is supported. Filter cartridge according to one of the preceding claims, wherein on the closure lid ( 37 ; 62 ) a handle ( 66 ) is provided for handling the filter cartridge. Filter device for removing fine dusts from a dust-laden gas stream, comprising at least two filter chambers through which the gas stream flows sequentially (US Pat. 2 . 3 ), in each of which at least one replaceable filter element is provided for filtering the gas flow, wherein the filter chambers ( 2 . 3 ) via a separating plate ( 8th ) are separated from each other, the filter elements as cylindrical filter cartridges ( 20 ) are formed from outside the filter device ( 1 ) directly into the filter chambers ( 2 . 3 ) and removable, the filter cartridges ( 20 ) in the filter chambers ( 2 . 3 ) to both a raw or pure gas side housing wall ( 9 . 6 ) as well as sealed to the environment to at the two ends of the filter cartridges ( 20 ) to effect a sealed seat so that they are at the two ends in the filter chambers ( 2 . 3 ) and are sealed dust-tight, and at one end of the filter cartridges ( 20 ) a closure lid ( 37 ; 62 ) is provided to seal them against the environment, that is, that the filter cartridges ( 20 ) are formed according to one of the preceding claims. Filter device according to claim 16, wherein the filter cartridges ( 20 ) are flowed through in immediately opposite filter chambers in the reverse direction. Filter device according to claim 16 or 17, wherein, where the filter cartridges are sealed to the environment, a removable closure lid ( 40 ) and / or a device for contact and contamination-free change a spent filter cartridge is provided. Filtering device according to one of Claims 16-18, in which the filter cartridges ( 20 ) at least at one end by means of a clamping and / or locking mechanism ( 27 ), which from outside the respective filter chamber ( 2 . 3 ) is operable against an associated wall ( 9 . 6 ) are kept biased the filter chamber. Filter device according to claim 19, wherein the clamping and / or locking mechanism ( 27 ) one from outside the filter chamber ( 2 . 3 ) actuatable mechanical or pneumatic tensioning device ( 27 ) to the respective end of the filter cartridge ( 20 ) against the associated wall ( 9 . 6 ) to bias. Filter system ( 1' ) with several filter devices ( 1 ) according to one of claims 16 to 20, wherein the filter devices ( 1 ) each shut-off valves for selectively shutting off the filter devices ( 1 ) are assigned and a central control device is provided, which is designed to shut off by selective actuation of the shut-off valves, the gas flow through a filter device for cleaning the filter cartridges of this filter device and free again.