DE102009019574A1 - Compensator for connecting two pipe sockets of e.g. combined heat and power station, has guide plate fastened to inlet pipe that is placed close to pipe socket, where radius of plate corresponds to internal radius of pipe socket - Google Patents

Abstract

The compensator has an inlet pipe (4) coaxially fastened to an outlet (12) of a pipe socket (1), and an outlet pipe (5) coaxially fastened to an inlet (22) of another pipe socket (2). A fabric compensator unit (6) interconnects the inlet pipe and the outlet pipe, where gas (3) loaded with dust is directed from the former pipe socket to the latter pipe socket. A hollow-cylindrical inlet guide plate (7) is fastened to the inlet pipe that is placed close to the former pipe socket, where radius (71) of the plate corresponds approximately to internal radius (13) of the former pipe socket.

Description

The The invention relates to a compensator for connecting a first pipe socket with a spaced apart and movable against it, second pipe socket, consisting of an inlet pipe, which at the Outlet opening of the first pipe socket coaxially attached is and an outlet tube, which is arranged approximately coaxially with the inlet tube is and is spaced therefrom and at the inlet opening of the second pipe socket is coaxially fixed and a fabric compensator, the inlet pipe and outlet pipe interconnects, all above-mentioned pipes can be flowed through by dust-laden gas which are directed from the first pipe socket to the second pipe socket is.

For Firing systems, such. B. cogeneration plants and waste incineration, and for all other applications that are hot Gases are to be led in pipes, are the respective temperatures Depending on the operating condition, the pipes are very differently. This causes heat-related shifts the tubes in their longitudinal axis and across it.

One important embodiment is a large combustion plant with a circulating fluidized bed system. In the circle of exhaust gas recirculation runs the so-called cyclone downpipe from the cyclone to the siphon, the returning one Emit ashes. This feedback loop can not constructed as a continuous welded pipe system be, since he then by the in the different operating conditions greatly different temperature of the individual pipe sections and which caused it to tear apart, different expansions would. Therefore, the separation of this circle is required but again at the separation point between the two pipe sockets a connection must be made that the thermally induced Movements of the two pipe sockets can compensate.

To known prior art are against each other something movable Pipe ends through bellows-type, flexible fabric compensators connected together, which consists of a textile material, that the possibly very high operating temperatures Can withstand and is permanently flexible, so that it the Movements of the two pipe sockets against each other compensated.

The GS DE 1 760 997 , Steinmüller, describes two flue-gas-carrying pipe sockets, which are movable against each other. In this case, only one movement in the axial direction of the two tubes is compensated. For this purpose, the two pipe sockets are telescoped into each other over a short length. This results in a narrow gap between the two flue gas pipes, which is covered by a multi-wave compensator. The disadvantage is that only one movement of the tubes can be intercepted against each other in the axial direction. Another, very significant disadvantage is that the transition of the flow of the narrow in the other tube and also in the opposite direction, the diameter is changed abruptly, so that form at this point vortices in the flow, which lead to the deposition of solids, the be entrained by the flowing gas.

On the current state of the art describes the GS DE 94 02 263 , GFG, a fabric compensator that consists of several layers: alternately with a layer of a "high-temperature insulating fabric" a stainless steel mesh or a stainless steel foil is incorporated. As a result, the fabric compensator is resistant to very high temperatures and still movable in the longitudinal direction as well as transversely to the flue gas stream. This fabric compensator is taken at its two ends, each with a metal ring and fastened by means of this ring to the two gas-carrying pipe socket.

Of the decisive disadvantage of this fabric compensator is that its Layers are very thin, which is inside the compensator leads to a cooling. Another Problem is that the cross section for the flow expanded suddenly. If the two pipe sockets are very close to each other, The compensator even makes out a bag. If the flue gas Solids such. As ash, also referred to as inert material, carries, This stores very quickly in the pocket-like bulged compensator one. In addition, it cools through in this Area insufficient insulation still from and clumps and hardens thereby.

In In a typical application, the ash components have one Temperature of around 900 degrees Celsius, which is a wall thickness of the fabric compensator of less than 1 cm. Thereby a significant cooling is effected, which in ashes too leads to a caking, so to an adherence of the individual ash components. In this way arise crusty deposits within the compensator and at its entrance and exit areas, damage to the compensator and blockage of the Can lead flue gas guide in this area.

There The compensator usually part of a very large and very complex plant with very high operating costs, are the downtime costs compared to the investment amount for the compensator in many cases extremely high.

Therefore, the invention has set itself the task of developing a compensator, the one possible laminar flow path of the dust-laden gases within the compensator allows and cools the flue gas as little as possible. As a solution, the invention teaches that a hollow cylindrical inlet baffle is attached to the inlet pipe close to the first pipe socket, whose radius corresponds approximately to the inner radius of the first pipe socket.

The essential feature of the invention is thus the inlet baffle, which is the largest part of the distance between the two pipe sockets covered and - in the first Approach - the inlet pipe and the outlet pipe Complemented inside to a double-walled tube. This Double-walled pipe is only through the slot between inlet pipe and outlet pipe interrupted, but the outward covered by the flexible fabric compensator. Inside there is the "double-walled pipe" through the two Joints between the inlet baffle and the two pipe sockets interrupted. These two joints, however, are essential as the two pipe sockets due to different temperatures of the system components move against each other and in both longitudinal as well in the transverse direction of the compensator.

The inlet guide plate according to the invention thus prevents radiant heat of the gas flow can be freely applied to inlet and outlet tube and between the groove on the tissue compensator acts. As a result, the gas flow is not cooled so much what the risk of encrustation due to the sticking together of ash components and other dust particles reduced.

One Another, more important advantage is that the inlet baffle Ashes, dust and other small solids to the largest Part stops by the joints between inlet pipe and outlet tube to penetrate the inside of the tissue compensator. This is especially dangerous because the ash constituents thereby cooling and therefore a crusting within the Compensator could form during movement of the two Pipe socket against each other and the consequent movement of the Tissue compensator lead to its destruction can.

In One embodiment variant is the penetration of ash through the joint between inlet baffle and first pipe socket reduced by a nozzle in the outlet opening the first pipe socket is arranged. Within this nozzle the inner radius of the first pipe socket tapers so that at the outlet of the nozzle, the flow rate of the gas increases and thereby a negative pressure in the gap created between the nozzle and the inlet baffle. This Negative pressure acts on the penetration of foreign bodies in the Cavity between baffle and the two pipes opposite.

If small solids and particles from the contained in the flue gas Dust and from the entrained ashes have entered the dead space, then they adhere to the walls of these dead spaces especially firm when charged electrostatically. These Electrostatic charge forms through the intense and multiple Contact of the particles with each other and with the walls of the pipe socket. To dissipate this electrostatic charge is a good grounding of all parts that touch the particles can be very effective. That's why the electric Grounding the lowest possible electrical resistance have, so over the largest possible Conductor cross sections done. A possibility for grounding are separate grounding cables for each component. It can also a common grounding cable from component to component are laid. Suitable are also other metal earth connections, provided they are low electrical resistance in the material and at the joints exhibit.

When Variant for further improvement of the isolation capability of the compensator can between the inlet baffle and the two tubes insulating materials are introduced, which of course the there prevailing, maximum temperatures have to withstand.

As well It makes sense to use a heat insulator between the tissue compensator and the outer walls of inlet tube and outlet tube provided.

The however, additional insulation material can not prevent that through the joints between the inlet baffle and the two Through pipe hot gas and thus also solid particles into the space between the inlet baffle and the inlet and outlet tubes penetrates. To protect the joint between the first pipe socket and the inlet baffle, the invention proposes an optional Nozzle in front.

To is at the at the outlet opening of the first pipe socket arranged a ring whose inner diameter on the input side of the Diameter of the first pipe socket corresponds and then to a Nozzle tapers by the inner diameter further reduced in the direction of the exit.

The Protective effect of such a nozzle is so good that in the area the inlet-side joint no further protective measures be proposed.

Without further protective measures in this area, the inlet plate over several, radi al running webs are connected to the inlet pipe. As a connection, it is sufficient that the inlet baffle z. B. with a collar and / or a paragraph rests on it. The advantage of this relatively loose connection is that relative movements between the inlet baffle and the webs are possible.

When Option will be an additional support of the Inlet baffle in the middle of the compensator proposed, where an inlet ring is attached to the inside of the inlet tube is and arranged in the profile of the compensator the distance from the outside Inlet pipe to the inner inlet baffle to the largest Part bridged.

additionally or alternatively, the inlet baffle also with this inlet ring be connected on the farther from the first pipe socket Side of the inlet plate is arranged. Again, it is a meaningful Alternative, that the inlet baffle only with a paragraph, a Bracket or another similar extension on the Inlet ring rests, because then it is opposite the inlet ring is relatively movable.

Around the inner space between the inlet and the outlet tube on the outer Side and the inlet baffle on the inner side as large as possible To design, the invention prefers that the inlet tube at the Outside surface of the first pipe socket is attached and that the outlet tube with the outer surface of the second Pipe socket is connected. The outer surface of the Pipe socket thus corresponds approximately to the outer surface of the compensator. Only the additional tissue compensator stands out over this line.

Around also the joint between inlet baffle and the second pipe socket in addition to the penetration of solids from the To protect gas, the invention proposes as another advantageous embodiment that a hollow cylindrical Auslassleitblech is attached to the outlet pipe. It bridges an outlet ring the distance from the outlet tube to the inner surface of the second pipe socket.

The Inner surface of this Auslassleitbleches should in the axial direction of the compensator overlap the inlet opening of the second pipe socket and always only a very small distance from the second pipe socket taking. For this purpose, the radius of the Auslassleitbleches must be independent remain constant from its operating temperature. For that beats the Invention before, that the Ausleitblech of adjacent or overlapping hollow cylinder segments exists. To compensate of thermally induced changes in length changes either a gap between each segment or yourself overlapping segments continue to move one above the other or from the adjacent segment by a corresponding piece pulled down so that the radius of the entire Auslassleitbleches not changed.

at the design must be the radius of this hollow cylindrical deflector so much larger than the radius of the inlet plate be selected, it is the inlet baffle in the longitudinal direction of the compensator can cover a part and still even with movements of the two pipe sockets transversely to its longitudinal axis does not abut the inlet baffle. The outlet baffle becomes - as mentioned - over one Outlet ring attached to the outlet pipe. The outlet ring bridges So the distance between the Auslassleitblech and the outlet pipe.

Of the substantial advantage of this additional Auslassleitbleches is that regardless of the axial distance between the two pipe sockets, the gap between the inlet baffle and the second Pipe socket always through the overlapping Auslassleitblech is closed in the radial direction, whereby the penetration of Solids in the annular cavity of the compensator is further braked. Another advantage is that thereby the Heat of the gas stream also retained becomes.

Around the penetration of solids from the smoke-laden dust to further reduce, the invention proposes that the - relatively large - inner diameter of the second pipe socket from its inlet opening beginning to narrow continuously until it reaches about the radius of the inlet baffle is reduced. This cone becomes one vortex-free transition of the flow reaches what - similar as with the nozzle in the inlet area - also for the gap between inlet baffle and Auslassleitblech the risk the penetration of foreign bodies further reduced.

Around the gap between the inlet baffle and the second pipe socket as close as possible in the axial direction, can in one embodiment, the inlet baffle and the Auslassleitblech over a floating coupling plate be connected to each other. This coupling panel is opposite one of the two baffles in the longitudinal direction of the compensator and against the other baffle in the transverse direction of the compensator displaceable. This will clear the way of solids between along the inlet baffle and the first pipe socket the inner wall of Auslassleitbleches stopped and that independently of which position the two pipe sockets are in relation to each other are located.

One Another advantage is that the heat radiation to the outside is largely blocked and thus the gas only very slightly is cooled.

When Another embodiment proposes the invention before that in the - about radially running - inlet ring a 360 degree circumferential bulge is formed. This bulge protrudes into a recess on the adjacent outlet ring, the profile of this indentation being approximately complementary to Profile of the bulge is shaped, but at that distance increased by the maximum movements the two pipe socket is predetermined against each other. Build it for heat rays from the hot Gas two more walls as resistance on, causing a cooling counteracts the gas flow.

Yet can the interior space between the inlet baffle on one side and on the other side the inlet and the Do not completely hermetically seal outlet tube, as the two Pipe sockets move against each other and therefore also the compensator must deform. That's why it can not be completely ruled out that solid from the gas in these cavities penetration. Since, in principle, there is relatively little matter in it moved, they are also called "dead spaces". One such forms between the first pipe socket, the inlet pipe, out the inlet ring and the inlet baffle. Another dead space created by the combination of the second pipe socket with the Outlet tube, the outlet ring and the outlet baffle. A third Cavity is approximately in the middle of Kompensatorprofils between the tissue compensator, the inlet ring, the outlet ring and the Coupling plate formed. If at least one of these cavities is subjected to blocking air, which passes through a pipe of is fed externally, so it penetrates Foreign bodies put up another resistance.

In Extension of this arrangement may still be due to the dead spaces a pipe connected to a suction device connected is. This can be done continuously or at intervals Foreign bodies are sucked off, despite all measures nevertheless have entered the dead spaces.

For an improvement in the action of the compensator makes sense that the pipes and / or the rings and / or the baffles on the zu the dead spaces facing surfaces with insulation material are fed. The Complementary Room to the Dead spaces should be filled with insulation. Thereby reduce the heat losses of the flue gas over the compensator, which - as mentioned - very is advantageous because in this way the cooling Ashes and slag components of a flue gas are hardly left clumping.

A another variant involving the adhesion of small solids braking at the surfaces of the compensator is that the pipes, the rings and the baffles of electrically conductive Material exist and are electrically connected. This will avoid the electrostatic charging of the baffles, otherwise the adhesion effect of the solid constituents of the gas is noticeable elevated.

In In another embodiment, this is the inlet pipe and the outlet tube - in addition to the tissue compensator - still connected by a flexible sealing element inside of the fabric compensator is arranged. Surrounded by the inlet pipe and the flexible sealing member and the outlet tube and the tissue compensator so creates a pressure chamber, which via the sealing air connection can be put under permanent overpressure. In order to becomes the tissue compensator of the pulsations in the subsequent Dead space between the inlet ring and the outlet ring uncoupled. This prevents the pulsations directly on the Acting on the fabric compensator and causing it to "flutter", which would cause its rapid wear.

Instead The pulsations remain as a breathing between the inner dead space inlet and outlet ring limited. So there are two barrier air circuits formed, of which the inner between inlet and outlet ring breathes and the outside essentially with one constant pressure is applied.

Both Barrier circuits are externally connected via connections accessible and can thus be supplied with sealing air become.

For the application of a compensator, in which the outlet pipe priority only in the axial direction against the inlet tube is movable, that must flexible sealing element only on the inlet or the outlet pipe be attached and then lies on the other tube with a lip or similar.

in the Following are further details and features of the invention will be explained in more detail with reference to three examples. These are not intended to limit the invention, but just explain.

It shows in a schematic representation:

1 Profile of the compensator in the simplest version

2 Profile of the compensator with Auslassleitblech, rings and coupling plate

3 Profile with inclined against the longitudinal axis inlet and outlet ring and the supply of sealing air

The 1 - 3 show the profile of a compensator according to the invention with the right half of a section along the longitudinal axis. In this case, all hatched areas denote a section through a respective annular part. All profiles are self-contained, so they run around the longitudinal axis 31 with full 360 degrees around. In the 1 to 2 is this longitudinal axis 31 - also as "longitudinal direction 31 "- in its course bent twice, which is shown by what measure the second pipe socket 2 - Shown in the figures below - opposite the first pipe socket 1 - Is shown in the drawings above - is offset.

In 3 is the longitudinal axis 31 drawn as a solid line, because in the illustrated operating state of the third embodiment of the first pipe socket 1 with the second pipe socket 2 axially aligned.

In 1 is the second pipe socket 2 opposite the first pipe socket 1 offset to the right and down in the drawing. Therefore, the two outer surfaces are aligned 11 and 12 the first and the second pipe socket 1 . 2 not with each other. In the axial direction, the maximum possible distance of the two pipe sockets is not yet reached, which is why the profile of the textile fabric compensator 6 another "fold beats".

In 1 the most general case of the invention is shown. It is at the outlet opening 12 of the first pipe socket 1 the nozzle D attached. In 1 becomes very quickly clear that in the nozzle D of the inner radius 13 of the first pipe socket 1 is reduced. As with a Venturi nozzle, this increases the flow velocity in this area and creates a negative pressure between the nozzle D and the inlet guide plate adjacent thereto 7 , This negative pressure prevents through the - unavoidable - gap between the inlet baffle 7 and nozzle D flue gas and solids contained therein in the cavity between inlet baffle 7 and inlet pipe 4 penetration.

The inlet baffle is over several - each radially aligned - webs 72 at the inlet pipe 4 attached. In 1 is easy to understand that the inlet baffle 7 in the radial direction opposite each web 72 is displaceable.

The 1 shows that each of the two pipe sockets 1 . 2 on its outer surface 11 . 21 the inlet pipe 4 or the adjacent outlet pipe 5 wearing. The outer surface 11 of the first pipe socket 1 Aligns with the outer surface of the inlet tube 4 and the outer surface 21 of the second pipe socket 2 Aligns with the outer surface of the outlet tube 5 ,

Approximately in the middle of the picture it can be seen that the outer surface of the outlet tube 5 to the outer surface of the inlet pipe 4 has a distance in the radial direction. This distance is created by the predetermined movement of the pipe socket 2 opposite the first pipe socket 1 , The resulting joint is made by the permanently flexible fabric compensator 6 Covered by means of several clamps on each a circumferential, L-shaped flange on the inlet pipe 4 and at the outlet pipe 5 attached.

Solid state resistance, which presses directly onto the flexible fabric compensator, however, is very limited. A permanent exposure to very high temperatures such as the gas flowing through 3 also consumes very much the life of the flexible fabric compensator.

In 1 becomes clear that in the illustrated, simplest version despite the shielding inlet baffle 7 nevertheless solids through the gap between the inlet baffle 7 and the second pipe socket 2 can pass through and through the gap between the inlet tube 4 and the outlet pipe 5 through in the tissue compensator.

A Such contamination would be extreme for two reasons detrimental: the first damage the hard ash particles cool the tissue compensator fairly quickly, secondly the ash constituents and other solids within of the fabric compensator very fast, since this is not a large can provide thermal protection. By this cooling clump the ash ingredients and make even bigger ones Solid state, the flexible tissue compensator with increased probability can damage.

To avoid these disadvantages, the inventions proposes additional embodiments which are incorporated in the 2 and 3 are shown.

2 shows the same cross section as in 1 , but with additional fittings and in an operating condition in which the second pipe socket 2 opposite the first pipe socket 1 deviates to the left, which also compared to the 1 changed "kink" of the longitudinal axis 31 becomes clear. This changed operating state is also due to the changed shape of the fabric compensator 6 recognizable.

In 2 is as an additional embodiment of the inlet ring 41 in the inlet pipe 4 shown. It bridges the distance between the outer inlet pipe 4 and the inner inlet baffle 7 and seals the inlet baffle in this variant 7 continue down. Furthermore, there is the function of the inlet ring 41 in protecting the insulation and limiting the dead space. Not to the essential function of the inlet ring 41 it counts, the inlet baffle 7 to wear.

In the inlet ring 41 is a bulge 42 introduced, which in a complementary, but enlarged by a certain distance indentation 52 on the outlet ring 51 protrudes. In 1 it can be seen that this indentation 52 so much larger than the silhouette of the bulge 42 that the bulge 42 in all states of movement of the second pipe socket 2 opposite the first pipe socket 1 inside the dent 52 is movable.

As a further embodiment variant shows the 2 the outlet baffle 8th between the inlet baffle 7 and the second pipe socket 2 , In 2 It is good to see that the Auslassleitblech 8th is multi-part, because it consists of several segmented hollow cylinders, which always complement each other regardless of their temperature and thus regardless of their extent to a ring with a constant radius. These segments are in the in 2 shown embodiment with the outlet ring 51 connected to the outlet pipe 5 is attached. This makes it possible, the Auslassleitblech 8th directly on the inner edge of the second pipe socket 2 to position.

The variant in 2 shows a conical taper of the inlet opening 22 evenly into the outlet baffle 8th passes. This will be at the edge between the Auslassleitblech 8th and the second pipe socket 2 avoiding unnecessary eddies, thereby reducing the risk that in the gap between Auslassleitblech 8th and inlet baffle 7 numerous, more solid particles are pressed into it.

In 3 is another expansion of the in 1 shown, most general form of a compensator according to the invention.

In this variant, the levels of the inlet ring 41 and the outlet ring 51 opposite the longitudinal axis 31 tilted the compensator. With vertical design of the compensator can thus foreign body on the lower portion of the outlet ring 51 driven by their gravity into the second pipe socket 2 slip back.

In 3 a barrier air system with double air chambers is shown. The inner air chamber is formed in the dead space between the inlet baffle 7 , the inlet ring 41 with the bulge arranged thereon 42 and the outlet ring with the indentation arranged thereon 52 , This inner air chamber is in the embodiment according to 3 outwards with a flexible sealing element 61 closed, the pulsations in the inner air chamber from the outer air chamber, the pressure chamber 62 , keeps away or at least strongly attenuates it.

The inner air chamber can via the sealing air connections S and S1 are subjected to sealing air, the foreign body and prevents particles from entering. Likewise, it holds flue gases from entering the dead space where they cool and thereby could crust.

In 3 Also, a second operating state of the sealing air concept in the inner air chamber becomes clear. If with vertical arrangement of the compensator in the indentation 52 the Auslassringes penetrated foreign body remain there and thereby the mobility of the indentation 52 opposite the bulge 42 Restrict or block, can be supplied via the upper sealing air port S blocking air and sucked air from the lower sealing air connection S2. It will be in the indentation 52 stuck foreign objects from the air flow and transported to the outside.

In the embodiment according to 3 created by the flexible sealing element, the inlet tube, the outlet tube and the tissue compensator another air chamber, the pressure chamber 62 , It can be put under permanent overpressure via the blocking air connection S1. In 3 is very well traceable, that therefore the tissue compensator 6 from the pulsations in the adjacent dead space between the inlet ring 41 and the outlet ring 51 is uncoupled and thus prevents the pulsations directly on the tissue compensator 6 act and put him in a "flapping motion" that would cause his rapid wear.

Instead, the pulsations remain as a breathing on the inner dead space between the inlet ring 41 and the outlet ring 51 limited.

3 clearly shows the two, through the flexible sealing element 61 Separated barrier air circuits, of which the inner between inlet ring 41 and outlet ring 51 breathes and the outer, the pressure chamber 62 , is subjected to a constant pressure substantially.

1

first pipe socket, lets the gas 3 one

11

Outer surface of the first pipe socket 1

12

Outlet opening of the first pipe socket 1

13

Inner radius of the first pipe socket 1

2

second pipe socket, takes the gas 3 on

21

Outer surface of the second pipe socket 2

22

Inlet opening of the second pipe socket 2

23

inner radius of the second pipe socket

3

Gas, flows from the first pipe socket 1 through the inlet pipe 4 and the outlet pipe 5 in the second pipe socket 2

31

Longitudinal direction of the compensator, corresponds to the longitudinal axis and the flow direction of the gas 3

4

Inlet pipe, between first pipe socket 1 and outlet pipe 5

41

Inlet ring, in inlet pipe 4

42

Bulge, encircling on the inlet ring 41

5

Outlet pipe, between inlet pipe 4 and second pipe socket 2

51

Outlet ring, in the outlet pipe 5

52

Indentation, circumferential in the outlet ring 51

6

Fabric compensator, connecting inlet pipe 4 with outlet pipe 5

61

flexible sealing element, between the inlet pipe 4 and the outlet pipe 5

62

Pressure chamber, between the tissue compensator 6 and the flexible sealing member 61

7

Inlet baffle, inside the inlet tube 4 , to pipe socket 1 subsequently

71

Radius of the inlet baffle 7

72

Bridge, holds inlet baffle 7

8th

Auslassleitblech, between inlet baffle 7 and outlet ring 5

81

Radius of Auslassleitbleches 8th

9

Coupling plate, connects inlet baffle 7 and outlet baffle 8th

D

Nozzle in the outlet 12 of the first pipe socket 1

S

connection for sealing air

S1

Connection for pressurizing the pressure chamber 62

S2

second connection for sealing air for pressurization or disposal of the inner dead space between inlet ring 41 and outlet ring 51

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

• - DE 1760997 [0005]
• - DE 9402263 [0006]

Claims (18)

Compensator for connecting a first pipe socket ( 1 ) with a spaced apart and movable against it, second pipe socket ( 2 ), consisting of - an inlet pipe ( 4 ), which at the outlet ( 12 ) of the first pipe socket ( 1 ) is attached coaxially and - an outlet pipe ( 5 ), Which is approximately coaxial with the inlet tube ( 4 ) is arranged and - is spaced therefrom and - at the inlet opening ( 22 ) of the second pipe socket ( 2 ) is attached coaxially and - a tissue compensator ( 6 ), the inlet pipe ( 4 ) and outlet pipe ( 5 ), wherein - all the aforementioned tubes ( 1 . 2 . 4 . 5 ) of dust laden gas ( 3 ) through which the first pipe socket ( 1 ) to the second pipe socket ( 2 ), characterized in that a hollow cylindrical inlet baffle ( 7 ) at the inlet pipe ( 4 ) close to the first pipe socket ( 1 ) whose radius ( 71 ) about the inner radius ( 13 ) of the first pipe socket ( 1 ) corresponds. Compensator according to claim 1, characterized in that the inlet baffle ( 7 ) - with several, radially extending webs ( 72 ) in the vicinity of the first pipe socket ( 1 ) and - a circumferential inlet ring ( 41 ) away from the first pipe socket ( 1 ), each at the inlet pipe ( 4 ) are attached. Compensator according to claim 2, characterized in that the inlet baffle ( 7 ) thereby with the webs ( 72 ) and the inlet ring ( 41 ) is connected, that it rests with a collar and / or a shoulder thereon, wherein relative movements between the inlet baffle ( 7 ) and the webs ( 72 ) and / or the inlet ring ( 41 ) possible are. Compensator according to one of the preceding claims, characterized in that at the outlet opening of the first pipe socket ( 1 ) a nozzle (D) is arranged, within which the inner radius ( 13 ) of the first pipe socket ( 1 ) rejuvenated. Compensator according to one of the preceding claims, characterized in that the length of the hollow cylindrical inlet baffle ( 7 ) the sum of the lengths of the inlet tube ( 4 ) and the outlet tube ( 5 ) does not exceed. Compensator according to one of the preceding claims, characterized in that - the inlet pipe ( 4 ) on the outer surface ( 11 ) of the first pipe socket ( 1 ) is attached and / or - the outlet pipe ( 5 ) with the outer surface ( 21 ) of the second pipe socket ( 2 ) connected is. Compensator according to one of the preceding claims, characterized in that a hollow cylindrical Auslassleitblech ( 8th ), - which consists of adjacent or overlapping hollow cylinder segments and - whose radius ( 81 ) greater than the radius ( 71 ) of the inlet baffle ( 7 ) and - that the inlet baffle ( 7 ) longitudinal ( 31 ) of the compensator to a part covered and - via a circumferential outlet ring ( 51 ) with the outlet pipe ( 5 ) is connected in the inlet ( 22 ) of the second pipe socket ( 2 ) merges with at least one hollow cylinder segment partially the pipe socket ( 2 ) overlaps in the axial direction. Compensator according to claim 4, characterized in that the inner diameter ( 23 ) of the second pipe socket ( 2 ) - from its entrance ( 23 ) beginning - continuously narrowed until it reaches about the radius ( 71 ) of the inlet baffle ( 7 ) is reduced. Compensator according to one of the preceding claims, characterized in that the inlet guide plate ( 7 ) and the Auslassleitblech ( 8th ) via a floating coupling plate ( 9 ) are connected to each other, - that opposite one of the two baffles ( 7 . 8th ) longitudinal ( 31 ) of the compensator is displaceable and - compared to the other baffle ( 7 . 8th ) is displaceable in the transverse direction of the compensator. Compensator according to one of the preceding claims, characterized in that in the inlet ring ( 41 ) a circumferential bulge ( 42 ), which - in one on the Auslassring ( 51 ) circumferential indentation ( 52 ), wherein - the profile of this indentation ( 52 ) approximately complementary to the profile of the bulge ( 42 ) is formed and - is increased by the movement distance, by the maximum movements of the two pipe sockets ( 1 . 2 ) is predetermined against each other. Compensator according to one of the preceding claims, characterized in that the dead spaces, which are located between the inlet ring ( 41 ), the first pipe socket ( 1 ), the inlet baffle ( 7 ) and the inlet pipe ( 4 ), and - between the outlet ring ( 51 ), the Auslassleitblech ( 8th ), the outlet tube ( 5 ) and the second pipe socket ( 2 ) are lined with insulation material. Compensator according to one of the preceding claims, characterized in that at least one of the dead spaces, which - between the first pipe socket ( 1 ), the inlet pipe ( 4 ), the inlet ring ( 41 ) and the inlet baffle ( 7 ) and - between the second pipe socket ( 2 ), the outlet tube ( 5 ), the outlet ring ( 51 ) and the Auslassleitblech ( 8th ) and - between the tissue compensator ( 6 ), the inlet ring ( 41 ), the outlet ring ( 5 ) and the coupling plate ( 9 ), permanently or intermittently with sealing air (S) are acted upon. Compensator according to Claim 8, characterized that at least one of the dead spaces over a Pipe connection to an exhaust (A) is connected. Compensator according to one of the preceding claims, characterized in that - the tubes ( 4 . 5 ) and / or - the rings ( 41 . 51 ) with the bulge ( 42 ) and the indentation ( 51 ) and / or the baffles ( 7 . 8th ) are fed with insulating material on the surfaces facing the dead spaces. Compensator according to one of the preceding claims, characterized in that - the tubes ( 4 . 5 ) and - the rings ( 41 . 51 ) with the bulge ( 42 ) and the indentation ( 51 ) and - the baffles ( 7 . 8th . 9 ) consist of electrically conductive material and - each have their own grounding cable or - a common grounding cable or - another grounding device are electrically connected to a ground terminal. Compensator according to one of the preceding claims, characterized in that the grounding an electrically conductive connection to the outer surface ( 11 ) of the first pipe socket ( 1 ) and / or to the outer surface ( 21 ) of the second pipe socket ( 2 ). Compensator according to one of the preceding claims, characterized in that the inlet pipe ( 4 ) and the outlet tube ( 5 ) by a flexible sealing element ( 61 ) that within the tissue compensator ( 6 ) and through the inlet tube (FIG. 4 ) and the flexible sealing element ( 61 ) and the outlet tube ( 5 ) and the tissue compensator ( 6 ), a pressure chamber is limited, which can be placed on the sealing air connection S1 under permanent overpressure. Compensator according to claim 17, characterized in that for an outlet pipe ( 5 ), which primarily in the axial direction against the inlet pipe ( 4 ) is movable, the flexible sealing element ( 61 ) only on the inlet or outlet tube ( 5 ) and on the other tube ( 5 . 4 ) rests with a lip or the like.