LU86448A1 - Diesel engine exhaust cleaning system - has filter assembly of equidistant, tubular filter elements i partitioned housing, forming two chambers - Google Patents

Abstract

The exhaust purifier has a carbon separating filter and a filter regenerator, comprising a separate sector with supply for a regenerating agent. The filter is contained in enclosed housing with inlet and outlet for the exhaust gases. The regeneration is carried out in filter sections in succession. The filter assembly comprises a large number of equidistant, tubular filter elements (2). A partition (5) divides the housing into two chambers (6,7), so that the filter tubes are in the first chamber (6) and their ipen ends in mating openings in the partition. Further partitions (8) in the second chamber (7) form a stationary regeneration chamber (10) for the regenerating agent.

Description

«- 1 - A 60 501 May 22, 1986.

METHOD AND DEVICE FOR CLEANING COMBUSTION EXHAUST GAS FROM COMBUSTION ENGINE

'The invention relates to a method for cleaning combustion exhaust gases from internal combustion engines with a circular disc-shaped, heat-resistant filter block having a plurality of filter channels, the inlet openings of which are arranged one after the other on one end face of the filter block, in which the filter channels of a regeneration segment are used for regeneration of the filter block against the incoming combustion exhaust gases are shut off on the inlet side and are subjected to the gasification of filtered-out filter parts, while at the same time the remaining filter channels are traversed by combustion exhaust gases to be cleaned, and in which all filter channels are regenerated periodically by performing the regeneration in succession on differently located, but equally large regeneration segments becomes.

If one speaks of segments here and in the following, then this preferably means sector-like sections of a circular disk which are delimited on both sides by radii of the axis of the circular disk.

From SAE paper 860137 (= SAE The Engineering Resource For Advancing Mobility, 400 Commonwealth Drive Uarrendale, PA 15096 / USA) page 10 it is known to burn out the filter channels of the filter block for regeneration. The flames for this are fed to the filter block via a nozzle. The nozzle ends in the expansion of the regeneration segment opposite the inlet-side end of the filter block. The nozzle can be rotated about the disc axis of the stationary filter block and, due to its respective angular position, always determines a different segment of the filter block as the respective regeneration segment.

- 2 - A 60 501 May 22, 1986.

. > * 4; * '

If, in such a case, due to spatial conditions, the combustion gases to be cleaned and the cleaned combustion gases are not supplied and discharged coaxially to the disk axis, an uneven distribution of the load on the filter can result depending on the arrangement of the inlet openings and the outlet openings and consequently Fluctuations in the temperature of the cleaned exhaust gases depending on the position of the nozzle. This is disadvantageous because fluctuating conditions cannot be optimized as well as constant conditions.

A first object of the invention is to design a method of the type mentioned in the introduction in such a way that the operating conditions can be better optimized.

The solution to this problem is characterized in that the filter block is rotated around its disc axis when transitioning to a new segmentation segment and that

Regeneration is always carried out in the same spatial position of the regeneration segment.

The operating conditions in the regeneration segment are different from those in the other segments. If the regeneration segment maintains its relative spatial position to the flow passing through the filter block, then the relevant influences on the formation of the coating and the exhaust gas temperature are less than in the known stil1 standing filter block with a rotating regeneration position.

Pressure sensors are recommended for optimal operation control. With a stationary and thus simple arrangement, these measure comparable values in the various regeneration cycles. The corresponding measuring probes would have to circulate around the known sti11 standing filter block.

, »J

- 3 - A 60 501 May 22, 1986.

t t fen or switched around * which is more cumbersome.

It is also easier to design a device for carrying out the method if the regeneration always takes place in the same spatial position.

In the prior art described at the beginning of SAE paper 860137, it is not specified in detail how the cleaned combustion exhaust gases are derived. Depending on the type of regeneration - pyrotechnic or catalytic chemical - the operating temperatures in the regeneration segment differ significantly from those in the other segments. A temperature compensation would be desirable because the local load on the filter block can be reduced by these temperature differences.

*

A second object of the invention is therefore to design a vehicle of the type mentioned in the introduction in such a way that such temperature compensation can be achieved in a simple manner.

This object is achieved in that a temperature equalization between the regeneration segment and the other parts of the filter block is carried out by the cleaned combustion gases are passed to the outlet side of the filter channels of the regeneration segment, so as to rinse them.

The flow control required for temperature compensation can be realized most simply if the regeneration always takes place in the same spatial position, and can be implemented particularly intensively in the case of a filter block which consists of a multiplicity of filter candles arranged in parallel, the interspaces of which provide space for the gas flow. The temperature compensation is - 4 - A 60 501 22.5.86.

Although less intensive can also be achieved in connection with a monolithic filter block and can be favored if the discharge channels for the cleaned gas are arranged transversely to the filter channels within the filter block.

In both of the solutions given, the transition from one regeneration segment to the next can take place by continuously rotating the filter block. However, more favorable conditions, in particular when handling the seal on the inflow side, result if the transition from one regeneration segment to the other takes place by gradually rotating the filter block. It is then expedient to temporarily loosen the shut-off on the inlet side of the regeneration segment during the gradual turning of the filter block, thereby protecting the seals.

The regeneration is expediently dependent on the flow resistance of a segment of the filter block, preferably the regeneration segment. This can simply be done in the Uleise by first specifying a chronological sequence of the regeneration steps. If it turns out that the flow resistance is too high at the start of regeneration in the regeneration segment, then you have to shorten the waiting time between two regeneration steps. If it is too short, you can extend it. The duration of the regeneration can be determined by stopping it as soon as the flow resistance in the regeneration segment has fallen below a predetermined value. Han can thus easily reduce the regeneration to the required level and thereby avoid unnecessary strain on the filter block due to too much regeneration.

The regeneration can be carried out by blowing hot burner gases into the filter channels of the Régénérâtionsseg-; 1 ’- 5 - A 60 501 May 22, 1986, mentes. This will ignite and burn the residues. The regeneration can also be carried out by heating the regeneration segment in the presence of catalysts. This will oxidize and gasify the residues.

When regenerated by hot burner exhaust gases, the regeneration segment becomes hotter than the other parts of the filter block. You can take advantage of this »by heating the filtered combustion exhaust gases by rinsing the regeneration segment, which at the same time cools the regeneration segment in the interest of temperature compensation. The heating of the combustion exhaust gases can be used for a catalytic aftertreatment of the combustion exhaust gases. For this purpose, it is sufficient to arrange the catalysts on the outlet surfaces of the filter channels, the catalysts being advantageously heated by the regeneration.

The invention also relates to a device for cleaning combustion exhaust gases from internal combustion engines with a circular disk-shaped, heat-resistant filter block, which has a plurality of filter channels, the inlet openings of which are distributed next to one another on the inlet-side end face of the filter block, with a regeneration agent feed line, the mouth of which overlaps a regeneration segment of the inlet end of the filter block extends and is connected to the end with seals, and with a combustion exhaust gas feed line, the mouth of which extends over the remaining parts of the inlet end of the filter block and is connected to the end with seals.

Such a device is known from the SAE paper 860137 already mentioned. This device has the disadvantages already mentioned at the beginning.

1 1 - 6 - A 60 501 May 22, 1986.

The object of the invention is to design a device of the type mentioned in such a way that safe and optimized operation is possible with simple constructional effort.

The solution to this problem is characterized in that a housing is provided which has an inlet connection for the combustion exhaust gas supply line, a connection for the regeneration agent supply line and an outlet connection for the clean gas discharge line and is otherwise closed gas-tight, that the mouth of the combustion exhaust gas supply line is arranged stationarily within the housing is that the mouth of the regeneration agent supply line is arranged stationary within the housing, that the filter block is arranged within the housing, that the filter block is rotatably mounted about its disc axis and that a drive motor is provided for rotating the filter block.

With such a device, the advantages can be achieved that are mentioned at the beginning for the first solution relating to the method.

The filter channels can run irregularly, as is the case, for example, if the individual segments are filled with non-woven or fibrous filter material. Over time, the gases search for filter channels in such a fleece or fibrous filter material. However, more intensive filtering, based on the given space, can be achieved if you specify the filter channels. This is expediently done for constructional reasons, in that the filter channels are arranged axially parallel to one another and to the circular disk axis of the filter block.

In order to achieve a seal on the inlet side between the combustion exhaust gases and the regeneration means in a simple manner, it is recommended that the inlet openings ‘- 7 - A 60 501 22.5.66.

of the filter channels are arranged together to form segments of the same size, that the segments are dimensioned in the grid of the regeneration segment, that between the inlet openings of adjacent segments, a sealing web extending radially to the circular disk axis remains free on the front side and that between the mouth of the combustion exhaust gas supply line and the mouth of the regeneration agent supply line tion sealing lips are provided, which sit in discrete angular positions of the filter block, which correspond to the operating positions of the filter block, sealingly on the sealing webs of the filter block.

If the sealing lips are made hard enough, they can be used to scrape off deposits from the rotating filter block on the front end of the filter block. However, an embodiment is preferred, which is characterized in that the filter block is arranged axially displaceably and that a lifter acting on the filter block is provided, which can be controlled by the drive motor for the filter block and, when the filter block is rotating, the filter block is separated from the filter block at sti11 The sealing block against the sealing block is slightly lifted by axial displacement. Then the sealing lips are only loaded when the filter block is standing stil1 and do not experience any abrasion when the filter block is rotating, which increases operational safety.

The filter block can be a monolithic filter block. For the reasons set out at the beginning, however, a filter block is preferred for many application cases, which consists of several cylindrical filter candles arranged next to one another with a gap, which are closed at their ends opposite the inlet opening and whose jacket wall consists of filter material.

The design of the filter block from several Fi 11ei— 8 - A 60 501 May 22, 1986.

Candles instead of a single monolith is also advantageous * because the individual filter candles can be replaced if necessary and because not so high temperature tensions can arise at different temperatures in the individual filter channels. If there is an ignition in the filter block during operation, then if the filter block consists of several filter candles, this is initially limited to one filter candle * while the other filter candles are decoupled. In addition, the individual combustion cartridges are flushed and cooled by the cleaned combustion exhaust gases. These are also advantages that speak for the design of the filter block from several filter cartridges instead of from a single monolith.

You can store the individual filter candles in the filter block on the fly at their entry end. This further reduces the thermal stresses. But you can also store them at both ends. Then the arrangement is much less sensitive to vibrations.

For the reasons set out at the beginning, it may be desirable that the cleaned combustion exhaust gases wash around the regeneration segment. An embodiment contributes to this, which is characterized in that the outlet connection for the cleaned combustion exhaust gases is arranged in the peripheral section of the housing over which the mouth of the regeneration agent supply line extends.

A spray jet of chemical oxidizing agents, optionally with added catalysts, can be provided as the regeneration agent. In contrast, because, in general, it is more reliable, a burner is preferred, the flame tube of which opens into the regeneration agent feed line and the flame of which filters out the suspended particles which have been filtered out.

Chen burned and thus gassed.

The suspended particles filtered out from the combustion exhaust gases are primarily soot. However, other floating particles can also be filtered out, for example drop-shaped unburned fuel components or other incompletely burned fuel components.

The invention is preferably applicable for cleaning the combustion exhaust gases from diesel engines. The application of the invention in vehicles is particularly advantageous because devices according to the invention only require stationary connections which can be designed in a very compact manner, and the regeneration and the filtering take place on one and the same filter block, i.e. only one filter block is required instead of possibly two Filter blocks that are operated alternately, one filtering while the other is being regenerated.

The invention will now be explained in more detail with reference to the accompanying drawing and some process examples.

- 10 - A 60 501 May 22, 1986.

The drawing shows:

FIG. 1 shows a device for cleaning combustion gases in cross section *

FIG. 1A shows the detail A from FIG. 1 enlarged,

FIG. 1B shows the detail B from FIG. 1 enlarged,

FIG. 2 shows section II from FIG. 1,

FIG. 3 shows section III from FIG. 1,

FIG. 4 shows section IV from FIG. 1,

5 shows the view V from FIG. 1,

FIG. 6 in the partial sectional representation corresponding to FIG. 1 the device when rotating the filter block,

Figure 7 shows a second embodiment in the

Sectional view corresponding to Figure 1, and

Figure 8 shows the section according to arrow VIII

Figure 7.

According to FIGS. 1 to 6, 1 denotes a housing within which a disk-shaped, heat-resistant filter block 2 is rotatably mounted about the disk axis 3.

The filter block is torsionally rigid on the shaft 4, which is rotatably mounted on the housing 1 at both ends in bearings 5 and 6. The bushings for Ulelle 4 are sealed. A drive motor 7, which is arranged outside the housing and is equipped with a jack 8, is used to drive the shaft 4. The shaft 4 is axially displaceable in the direction of arrow 9 by the jack 8.

When the drive motor is sti11, the filter block 2 lies with its entry-side end face 10 against an outer sealing ring 11, an inner sealing ring 12 and two radial sealing lips 19, 20. As soon as the drive motor 7 is switched on, the lifter 8 takes effect and lifts the shaft 4 together with the filter block 2 into a position, as can be seen in FIG. 6, from the seal 11 - A 60 501 22.5.86.

wrestle 11 and 12 and the sealing lips 19 and 20. As soon as the rotary movement has ended, the lifter 8 pushes the filter block back into the sealing position shown in FIG.

The sealing rings 11 and 12 seal an inlet-side chamber 13 of the housing 1 against an outlet-side chamber 14 of the housing. With 50 an outlet nozzle is designated, which starts from the chamber 14 and is used to discharge the cleaned combustion exhaust gases. As can be seen particularly well from FIG. 2, this outlet connection is located in the same peripheral section of the housing 1 over which the department 17 also extends. It is diametrically opposite the inlet connection 21, based on the circular disk diameter of the filter block 2, approximately in the axial center of the chamber 14. The housing 1 is, apart from the inlet connection 21 and the outlet connection 50, gas-tight.

The inlet-side chamber 13 is divided into two compartments 17, 18 by two walls 15, 16 extending along two radii. In the department 18 leads an inlet port 21 to which a combustion exhaust gas supply line is connected. Department 18 accordingly forms the mouth of the combustion exhaust gas feed line. The flame tube 23 of an oil burner 24 is connected to the department 17, the flame 25 of which is directed into the department 17 parallel to the axis 3 during burner operation.

In this exemplary embodiment, the burner flame 25 or the hot burner exhaust gases are the regeneration means and the section 17 forms the mouth of the regeneration means supply line.

Department 18 opens into a 300 degree sector on the front side 10. Department 17 opens into a 60 - 12 - A 60 501 May 22, 1986.

Degree large sector on the front 10.

The filter block 2 consists of a multiplicity of cylindrical filter candles 30 to 37 arranged parallel to the axis 3 with a space next to one another, which are closed at their ends opposite the inlet opening 38 and the jacket wall 39 of which consists of porous filter material. The openings of the filter cores all lie in the end face 10. Each filter candle has a blind hole 40 which extends parallel to the axis 3 and serves as a filter channel. On the inlet side, the filter candles are attached to a mounting plate 42. On the opposite side, they are attached to a mounting plate 43. These two mounting plates 42 and 43 are torsionally rigid on the shaft 4.

The filter cartridges are made of porous, metallic or ceramic filter material. The mounting plates 42, 43 are gas-tight. They can be made of ceramic or metal. Due to its porosity, the ceramic filter material is permeable to the cleaned combustion exhaust gas, but not permeable to the suspended particles to be filtered out.

The filter candles are arranged in such a way that their inlet openings 38 ... are arranged in segments of the same size. In the example, there are six segments, each of which extends over 60 degrees and each contains ten filter cartridges. Between the inlet openings of adjacent segments, a sealing web of the end face, which extends radially to the circular disk, is left free, for example, the sealing web 47. Such a sealing web is thus formed by a straight zone on the end face of the filter block, which zone is left free of the inlet openings.

In the operating position shown in Figure 2, the t 1 - 13 - A 60 501 22.5.86.

generally designated 46 segment between the walls 15, 16 and the sealing lips 19, 20 and the sealing lips 19 and 20 extend along the sealing webs 47, 48, which delimit this segment on both sides, and form a seal against the department 17 Department 18.

The filter candles, which face the department 18, are used only for filtering, while the filter candles, which face the department 17, that is to say belong to the segment 46 in the position shown in FIG. 2, are in the regeneration position, that is to say form the so-called regeneration segment.

During operation, the combustion exhaust gases to be cleaned flow into the inlet connection 21, flow into the filter channels of the individual filter candles, penetrate the wall of the candles, are freed of their floating particles, in particular soot, and pass cleaned into the chamber 14 and flow via the outlet connection 50 from. On the way from the filter candles to the outlet connection 50, the cleaned combustion exhaust gases flow around the filter candles of the regeneration segment 46, which are not involved in the filtering. With this flow, heat transfer takes place, which causes temperature compensation.

The filter candles of the regeneration segment 46 are regenerated by blowing hot gases out of the burner 24, as a result of which the suspended particles, for example soot, deposited there during a previous filtering process are burned. The combustion exhaust gases pass through the porous walls of the filter candles of the regeneration segment 46 and combine with the cleaned combustion exhaust gases and flow out via the outlet connection 50.

The heat transfer with the filter candles of the rain- '4 - 14 - A 60 501 22.5.86.

cleaned combustion exhaust gases flowing around the ration segment lowers the high temperature of the filter candles of the regeneration segment 46 and leads overall to temperature compensation in the entire filter block. All filter candles can be coated on the outside with catalyst material for aftertreatment. Then the cleaned combustion exhaust gases washing around the hot filter candles of the regeneration segment are catalytically aftertreated.

With 60 a pressure measuring probe is designated, which is arranged stationary in the housing 1 in the chamber 14. With 61 a second pressure measuring probe is designated, which is arranged stationary in the housing in the department 17. The flow resistance of the regeneration segment 46 is measured at these pressure measuring probes and, as stated at the beginning, the duration and the periodicity of the regeneration cycle are controlled on the basis of the measured values obtained. You can also get by with a single pressure probe. Then, however, one preferably chooses the pressure-side pressure measuring probe 61 and dispenses with the pressure measuring probe 60.

As soon as the regeneration segment or the filter candles of the regeneration segment 46 are regenerated, the burner 24 is switched off and the drive motor 7 is put into operation for a rotation of the filter block by 60 degrees, that is, to the extent that the adjacent 60-degree segment is in the position as Regeneration segment between the walls 15 and 16. The segment that has just been regenerated now reaches the area of department 18 and is involved in the filtering.

At the start of the rotary movement, the lifter 8 lifts the filter block from the sealing lips 19, 20 and the sealing rings 11, 12, so that wear is avoided, at the end of the rotational movement, the lifter 8 lifts the filter block 2 back into its sealing line and the one described Cycle can * »- 15 - A 60 501 22.5.86.

be repeated.

The combustion gas supply can be switched off while the filter block is being rotated. However, this is not necessary, the combustion exhaust gases can also be conveyed and filtered while the filter block is rotating. The consequences of the low leakage when turning can be accepted.

The second exemplary embodiment shown in FIGS. 7 and 8 differs from the first exemplary embodiment according to FIGS. 1 to 6 in the configuration of the filter block 100 as a monolith, a larger configuration of the outlet-side chamber 101 and the arrangement of the outlet connection 102 axially offset with respect to the filter block.

The filter block 100 is a circular disk-shaped monolith made of porous ceramic material and attached to the shaft 103 in a torsionally rigid manner. Axial-parallel blind holes 106, which form the filter channels, extend from the inlet-side end face 104 to the circular disk axis 105. Axially parallel to these blind holes, there are 107 blind holes 108 from the opposite end face, which extend between the blind holes 106, namely axially parallel to the axis 105. These blind holes serve to extract the cleaned combustion exhaust gases.

Sealing rings 110, 111 and sealing lips 112, 113 extend along the end face 104 and are similar in function and arrangement to the corresponding seals from the first exemplary embodiment. The sealing lips sit on partitions 114, 115 through which the chamber 116 of the housing 117 is divided into two sections 118, 119. Division 119 extends over a 60 degree sector and division 118 extends over a 300 degree sector. The flame tube of an oil burner 120, * f - 16 - A 60 501 22.5.86, opens into department 119.

Inlet 118 opens into inlet connection 121 for the combustion exhaust gases to be cleaned. The sector of the filter block which is in each case opposite the department 119 is the regeneration segment, the filter channels of which are regenerated with the aid of the burner 120, while the remaining filter channels serve to filter the combustion exhaust gas flowing in at the inlet connection 121.

The cleaned combustion exhaust gases flow on the rear face 107 along the regeneration segment and lead to a temperature compensation there, but not nearly as intensely as in the first exemplary embodiment. Otherwise, the second exemplary embodiment is operated in exactly the same way as the first exemplary embodiment.

In a modification of the exemplary embodiments shown, a spray head can be provided for regeneration instead of a burner 24 or 120, which directs a spray jet into the filter channels of the regeneration segment instead of the flame 25. This spray jet can contain oxidizing agents and catalytic agents with which the filtrate is oxidized and gasified.

In a further modification of the illustrated embodiments, the lifter 8 can also be dispensed with. Then the seals must be made appropriately hard and resistant. In such a case, the sealing lips 19 and 20 can also serve to scrape off residues which have settled on the end face 10.

In both exemplary embodiments, the filter blocks can also be rotated continuously instead of rotating them step by step, and the burner 24, 120 or a sprayer provided instead can be kept in operation, and so intensively that when the individual filter channels pass through the regeneration segment, there is a 't - 17 - A 60 501 22.5.86.

sufficient regeneration is achieved. In such a case, the function of the jack 8 is omitted.

Claims (23)

18. A 60 501 May 22, 1986. «PATENT CLAIMS: 1. A method for cleaning combustion exhaust gases from internal combustion engines with a circular disk-shaped, heat-resistant filter block, which has a plurality of filter channels, the inlet openings of which are arranged next to one another on one end face of the filter block, in which, for regeneration, the filter channels of a regeneration segment of the filter block against the incoming combustion exhaust gases are shut off on the inlet side and are acted upon to gasify filtered-out Schuebittei1chen, while at the same time the remaining filter channels are penetrated by combustion exhaust gases to be cleaned, and in which all filter channels are regenerated periodically by the regeneration is carried out successively on differently located, but equally large regeneration segments, characterized in that the filter block is rotated about its disc axis when transitioning to a new regeneration segment and that the regeneration is always in the same spatial length age of the regeneration segment. 2.Method for cleaning combustion exhaust gases from internal combustion engines with a circular disk-shaped, heat-resistant filter block * which has a multiplicity of filter channels, the inlet openings of which are arranged next to one another on one end face of the filter block, in which, for regeneration, the filter channels of a regeneration segment of the filter block against the incoming combustion exhaust gases are shut off on the inlet side and acted upon to gasify suspended particles filtered out, while at the same time the remaining filter channels are traversed by combustion exhaust gases to be cleaned, and in which all filter channels are periodically regenerated 1 year 19. A 60 501 22.5.66. are made by successively performing regeneration on different, but equally sized regeneration segments, in particular according to claim 1, characterized in that a temperature compensation between the regeneration segment and the other parts of the filter block is carried out by the cleaned combustion exhaust gases on the output side of the filter channels of the regeneration segment this can be passed around. 3. The method according to claim 1 or 2, characterized in that the transition from one regeneration segment to the next takes place gradually and that the barriers for the input side of the regeneration segment are temporarily loosened during the gradual rotation of the filter block. 4. The method according to any one of the preceding claims, characterized in that the regeneration is controlled as a function of the flow resistance of a sector of the filter block. 5. The method according to any one of the preceding claims, characterized in that the filtered suspended particles are oxidized and gasified by blowing hot burner exhaust gases into the filter channels of the regeneration segment. 6. The method according to any one of claims 1 to 4, characterized in that the filtered suspended particles are gasified by heating the regeneration segment in the presence of catalysts. 7. The method according to any one of claims 2 to 5, characterized t 20. A 60 501 May 22, 1986. characterized in that the filtered combustion exhaust gases are heated by washing around the regeneration segment and are catalytically aftertreated. 8.Device for cleaning combustion exhaust gases from internal combustion engines with a circular disk-shaped, heat-resistant filter block, which has a multiplicity of filter channels, the inlet openings of which are distributed side by side on the one end face of the filter block, with a regeneration agent, the mouth of which overlaps a regeneration segment of the inlet end of the filter block extends and is connected to the end with seals, and with a combustion exhaust gas feed line, the mouth of which extends over the remaining parts of the inlet end of the filter block and is connected to the end with seals, characterized in that a housing (1) is provided, which has an inlet connection (21) for the combustion exhaust gas supply line, a connection for the regeneration agent supply line (<23) and an outlet connection (50) for the clean gas discharge line and is otherwise gas-tight closed is that the mouth (18) of the combustion exhaust gas feed line is arranged stationary within the housing, that the mouth (17) of the regenerant feed line is arranged stationary within the housing, that the filter block (2) is arranged within the housing, that the filter block is rotatable about its disc axis (3) is mounted and that a drive motor (7) is provided for rotating the filter block. 21. A 60 501 May 22, 1986. 9. The device according to claim 8 *, characterized in that the filter channels <40) are arranged axially parallel to the circular disc axis of the filter block (2). 10. The device according to claim 8 or 9, characterized in that the inlet openings (38) of the filter channels (40) are arranged together to equal segments (46), that the segments are dimensioned in the grid of the regeneration segment that between the inlet openings (38) Adjacent segments, a sealing web (47, 48) of the end face (10) extending radially to the circular disc axis (3) remains free, and that sealing lips (19, 20) are provided between the mouth (18) of the combustion exhaust gas supply line and the opening (17) of the regeneration agent supply line which sit in discrete angular positions of the filter block, which correspond to the operating positions of the filter block, on the sealing webs of the filter block. 11. The device according to any one of the preceding device claims, characterized in that the filter block (2) consists of a plurality of cylindrical filter candles (30 ...) arranged axially parallel with a space next to each other, at their ends opposite the inlet opening <38 ...) are closed and the jacket wall consists of filter material. 12. Device according to one of the device claims 8 to 10, characterized in that the filter block (100) achsparal1ele, from the inlet side outgoing blind holes (106) as filter channels, between those of the opposite '* 22. A 60 501 May 22, 1986. Front (107) outgoing blind holes (108) are arranged as discharge channels and that the entire filter block consists of filter material. 13. Device according to one of the preceding device claims, characterized in that the outlet connection (50) for the cleaned combustion exhaust gases is arranged in the peripheral portion of the housing (1) over which the mouth (17) of the regeneration agent supply line extends. 14. Device according to one of the preceding device claims, characterized in that a burner (24) is provided, the flame tube (23) opens into the mouth <17) of the regeneration agent supply line. 15. The device according to one of the preceding device claims, characterized in that a pressure measuring probe (61) in the region of the mouth (17) of the regimentation supply line is arranged stationary in the housing <1), and / or that a second pressure measuring probe (60) on the output side (14) of the filter block (2) is arranged stationary in the housing. 16. Device according to one of the preceding claims, characterized in that sealing lips (19, 20) are provided for sealing the mouth (18) of the combustion exhaust gas feed line against the mouth (17) of the regeneration agent feed line, which on the input end face (10) of the filter block < 2) can sit sealingly, that the filter block (2) is arranged axially displaceably, and that a lifter (8) acting on the filter block 23. A 60 501 May 22, 1986. is provided, which can be controlled by the drive motor (7) for the filter block, and, when the filter block rotates, lifts the filter block somewhat from the sealing lips which are in contact with the sti11 filter block by axial displacement.