EP2322673A2 - Method and device for guiding the flow in industrial oven used in the thermoforming of metallic materials/workpieces - Google Patents

Abstract

The method for guiding a stream of gas during quenching in process of heat treatment of metallic materials/workpieces in industrial furnaces for treatment chamber of single-chamber vacuum furnace, comprises guiding a produced current running in a direction against surfaces (2.2) standing to each other in interval. The original stream is splitted between the surfaces through the effect of a flow separation at free edges of the surfaces in flow direction deflected to original flow direction. The stream is guided against the right-angled surfaces standing to original flow direction. The method for guiding a stream of gas during quenching in process of heat treatment of metallic materials/workpieces in industrial furnaces for treatment chamber of single-chamber vacuum furnace, comprises guiding a produced current running in a direction against surfaces (2.2) standing to each other in interval. The original stream is splitted between the surfaces through the effect of a flow separation at free edges of the surfaces in flow direction deflected to original flow direction and is guided to a comparison moderate and/or intensified guidance of degassing of the material/workpiece to be treated forming a charge in the treatment chamber. The stream in the original flow direction is guided against the surfaces to a surface dimension (2.6) by the free edges of the surfaces in cascade-like manner or is guided against the surfaces standing to each other in parallel interval. The stream is guided against the right-angled surfaces standing to original flow direction. The stream is guided in a flow reducing itself in original flow direction along a plane formed through the free edges. The stream is guided along a contrived curve formed through a curve connecting the free edges of the surface. The contrived curve degressively or progressively passes. The stream delivered by a blower follows the guiding surfaces associated to the blower, flows in axial direction of the blower against the surface and is guided to an area of opening (1.2) of the treatment chamber. The stream is guided in a dimension area to the surface by a limiting surface (2.4). The stream is guided to a revolving limiting surface. The stream is closed through the revolving limitation area to the surface. The stream is guided through the movable limiting surface in its speed or its cross-section/volume of one position until on or until to in the sense of a variation of volume stream. The gases delivered from the blower are cooling gas and the blower is a cooling blower. The treatment chamber is used as cooling chamber. An independent claim is included for a device for guiding a stream of gas during quenching in process of heat treatment of metallic materials/workpieces in industrial furnaces for treatment chamber of single-chamber vacuum furnace.

Description

Technical area

The invention relates to a method and a device for directing the flow of gases in the process of heat treatment of metallic materials / workpieces in industrial furnaces, in particular for treatment chambers of vacuum furnaces, preferably single-chamber vacuum furnaces for cooling the materials / workpieces.

State of the art

Are known industrial furnaces such as vacuum furnaces, such as described in DE 33 22 386 C2 as a furnace for cooling a batch, in particular of metallic workpieces, after a heat treatment, which operate without a gas guide and thereby achieve no homogenization of the flow of gases for efficient cooling of the materials / workpieces.

The in the DE 32 15 509 C2 described gas guide can not realize efficient cooling of the materials / workpieces because of the small holes and the dynamic pressure generated thereby without additional, ie consuming means.

For the homogenization of the gas flow is according to the DE 195 01873 C2 a method and apparatus for cooling workpieces, in particular for curing in a vacuum furnace, in which a gas-conducting device is also used. The disadvantage here is that in the homogenization of the gas flow directional deflection from horizontal to vertical is not possible.

The JP 2005029872 A1 discloses for vacuum furnaces a system for gas redirection and homogenization, which is intended to divert the cooling gas at high speed through adjustable vanes at an angle <90 ° to the incoming gas direction. The mechanics of adjustable wing requires a relatively complicated and complex control or steering.

The view on the US H 777 shows a method for cooling in vacuum furnaces with a system for flow compensation by means of nozzle bores, in which the gas deflection but is structurally separated and is due to the special application in aircraft far from the problem to be solved here.

In vacuum furnaces for heat treatment of batches of metallic workpieces, the trend in the direction of, in particular, a flow of cooling gas has been to arrange so-called gas guiding devices in the region of the closable openings formed in heating chamber walls for the supply and removal of cooling gas in a pivotable or height-adjustable manner.

Thus, on the one hand, the function of shutting off the cooling gas flow from a pressure chamber to a heating chamber or the function of shutting off the flow of cooling gas from a suction chamber to the heating chamber should be achieved by this means.

On the other hand - and important for the investigation of the local problem - there was also the goal to achieve an improved intensity of cooling performance. So was indeed according to the EP 0 754 768 B1 achieved with a height-adjustable gas guide a certain planar uniformized gas flow to the batch, however, resulted in an overall improved intensity of the cooling performance less from the flow conditions created by the Gasleiteinrichtung, but mainly from an increase in the performance of the cooling fan.

Without the causes, so u.a. the development of an adverse dynamic pressure to investigate more closely, namely not primarily to seek to increase the performance of the cooling fan, but to provide improved flow conditions have been maintained pivotable, height-adjustable or similar functioning Gasleiteinrichtungen.

In addition, after examining the heat treatment operations in an eg vacuum furnace, such as charging, evacuating and heating the furnace, heat treating and quenching the charge upon circulation of the cooling gas, depressurizing and discharging, These said gas guiding devices can only have their effect in their kinematics and function when the batch is quenched.

Explanation of the essence of the invention

The invention is based on the object to provide an efficient method and a structurally simple device, whereby a direction reversal of any flow, i. both a cooling medium and a heating medium, e.g. from horizontal to vertical or vice versa and the flow homogenized and directed so directed to the batches with the treated materials / workpieces in generic industrial furnaces largely without dynamic pressure, whereby the heat treatment together with cooling intensity improves and energy consumption and the power consumption of a cooling fan can be lowered ,

According to the invention, this object is achieved with a method for conducting a flow of gases in the process of heat treatment of metallic materials / workpieces in industrial furnaces, especially for treatment chambers of vacuum furnaces, preferably single-chamber vacuum furnaces, in which a generated and in one direction extending original flow against spaced surfaces are guided, these surfaces are flown, divided the original flow between the surfaces by the effect of a stall at free edges of the surfaces in the original flow direction deflected flow directions and to a more uniform and intensified leading fumigation of a batch forming and treating materials / workpieces is passed into the treatment chamber.

The process is expanded by, as seen in the original flow direction, the flow against the following surface, which overhangs the preceding surface by at least one surface dimension by means of the free edge, that is, cascade-like. is guided against the cascaded surfaces to each other over the free edges.

Appropriately, the flow against the parallel spaced-apart surfaces, which may be perpendicular to the original flow direction out.

With regard to constructive possibilities for realization, the flow in a flow that reduces volume in the original flow direction should-according to a first variant-be guided along an imaginary straight oblique plane formed by the free edges, the flow being seen in an imaginary section an imaginary hypotenuse of an imaginary right triangle, formed by a straight line connecting the free edges of the surfaces, runs, and said volume reduced flow results from the divided by the effect of the stall and deflected partial streams.

The stream decreasing in volume can also - according to a second variant - are guided along an imaginary, like a curved plane formed by the free edges, wherein seen in section the flow along an imaginary curve, formed by one of the free edges of the surfaces connecting curve, runs. The imaginary curve can be progressive or degressive.

With the method, the beneficial effects can be practically implemented by the fact that the flow discharged from a fan follows the fan and then flows in the axial direction of the fan against the surfaces and then deflected to at least one area of at least one opening of the treatment chamber.

According to the practice, the application in several areas of openings of the treatment chamber is possible.

The flow can be forced in at least one dimension range to the surfaces by means of at least one boundary surface, which are pivotable and / or rigid executable, so that e.g. the flow through the pivotable boundary surface can be shut off to the surfaces.

Since the opening of the treatment chamber such as a heating chamber in industrial furnaces is closed during heating, but opened during cooling, a hinged boundary surface serves as a hatch or flap for thermal separation of the heating chamber from the pressure vessel and is required in installations with convective heating. In systems without convective heating, this separation can be carried out as a labyrinth.

On the other hand, in special embodiments, it may also be useful if the flow in its velocity or its cross-section / volume is directed from a position to "open" or to "closed" with said pivotable boundary surface in the sense of a change in the volume flow.

The method is primarily intended for use during quenching in the process of heat treatment of metallic materials / workpieces, in which case the gases discharged from the fan are cooling gases, the fan is a cooling fan and the treatment chamber is also used as a cooling chamber.

This method is carried out by a device as a gas guide, which is used to direct the flow of gases in the process of heat treatment of metallic materials / workpieces, in particular for treatment chambers of vacuum ovens, preferably single-chamber vacuum ovens, in a frame spaced from one another, with free surfaces Edges, which can tear off the flow (5), and divides the original flow direction in deflected flow directions between the surfaces.

In this case, a following projects past the preceding surface in at least one surface dimension in a cascade-like manner by means of free edges. Conveniently, the surfaces may be at a parallel distance from each other.

The free edges, seen in section, follow an imaginary straight line following an inclined plane, an imaginary hypotenuse in an imaginary right-angled triangle.

Alternatively, the free edges - as seen in section - can follow an imaginary curve that is progressive or degressive.

Structurally simple, the surfaces are bordered by a box-like frame and point. at least one web connecting the surfaces in a stabilizing manner.

A pivotable boundary surface and / or a rigid boundary surface ensure the above-mentioned embodiment of the method with regard to the steering of the volume flow.

According to the practice of an industrial furnace, radially arranged surfaces in the region of a blower are used to support the effects according to the invention, these surfaces being formed by a pipe system of a gas-water heat exchanger which reduces swirl, acts as a flow rectifier and is located in the region of a fan wheel.

A rise angle of the cascade-like surfaces should suitably be between 5 ° and 60 °, the distance between the surfaces may be 10 to 1000 mm.

This device designed as a gas-conducting device is assigned to a region of an opening of the treatment chamber. Several gas-conducting devices can be assigned to a respective region of a plurality of openings of the treatment chamber (1.1).

For optimum dimensioning of the device, the size and the areal dimension of the gas-conducting device correspond to the flow-through batch area, whereby the cross-section of the flow-through charge should be used for the dimensioning.

According to these principles of solution of the invention, the method in claims 1 to 14 and the device in claims 15 to 30 are shown in terms of their independent and dependent features.

With the invention is advantageously achieved over the prior art, that the flow is homogenized and directed in quasi partial streams directed to the materials / workpieces in generic industrial furnaces in the sense of the task. The technological costs are low. The flow is homogenized and directed directed to the materials / workpieces in generic industrial furnaces largely without back pressure.

Thus, the invention also affects an optimal design, i. reducible design of the performance of a cooling fan.

Ultimately merge with the invention, the advantageous flow-side effects with the energetic effects of heat treatment along with the energetic effects of the installed capacity of a cooling fan to a single-acting advantage for the operator generic industrial furnaces in terms of energy and environmental performance.

Brief description of the drawings

Fig. 1

eine Prinzipdarstellung eines verfahrensgemässen Strömungsverlaufs in einem gattungsgemässen Industrieofen 1,

Fig. 2

die prinzipielle Anordnung einer erfindungsgemässen Einrichtung 2 als Gasleiteinrichtung zu einer Öffnung 1.2 einer Behandlungskammer 1.1 in dem als Vakuumofen ausgebildeten Industrieofen 1,

Fig. 3

die Einzelheit der Einrichtung 2 nach Fig. 2 mit kaskadenartig ansteigenden Flächen 2.2 gemäss dem Anstieg analog einer "Hypotenuse".

In the accompanying drawings show

Fig. 1

1 is a schematic representation of a flow path according to the method in a generic industrial furnace 1,

Fig. 2

the basic arrangement of a device 2 according to the invention as a gas guiding device to an opening 1.2 of a treatment chamber 1.1 in the industrial furnace 1 designed as a vacuum furnace,

Fig. 3

the detail of the device 2 after Fig. 2 with cascading rising surfaces 2.2 according to the increase analogous to a "hypotenuse".

Best way to carry out the invention

The invention will be described in more detail with reference to an embodiment with variants.

In Fig. 1 is a procedural course of flow in an industrial furnace 1 with a treatment chamber 1.1 and an opening 1.2 and an associated device 2 as a gas guide schematically shown. A fan 3 with a fan 3.1, a flow outlet 3.2 and 3.3 baffles is attached to the treatment chamber 1.1. Behind the blower is a gas-water heat exchanger 4 with a not designated pipe system formed, radially arranged surfaces 4.1. A running flow 5 is indicated by directional arrows, wherein an original flow direction 6 and a deflected according to the invention flow direction 7 are highlighted schematically with arrows.

Fig. 2 shows the basic arrangement of devices 2 according to the invention as gas-conducting devices to the openings 1.2 and 1.2 of the treatment chamber 1.1 situated here above and below. The devices 2 each comprise a box-like frame 2.1 with surfaces 2.2. Depending on the position of the device 2 to the openings 1.2 have the surfaces 2.2 - in this case upper and lower - free edges 2.2.1, each in a straight line 2.2.2 in the direction of the original flow direction 6 rise (upper free edges 2.2. 1) and fall off (lower free edges 2.2.1). Furthermore, a respective pivotable boundary surface 2.4 is provided, which is articulated to the frame 2.1 and operated by means not shown.

Corresponding Fig. 3 are details of the device 1 after Fig. 2 with the cascading at a distance 2.7 each other superior surfaces 2.2 shown in section. Symbolically, the straight line 2.2.2 of a "hypotenuse" with a rise angle 2.9 in a right triangle, when compared to the frame 2.1 is used with its unnamed lower part and its not designated back wall as a leg geometrically comparative. Here is also shown a variant in which the pivotable boundary surface 2.4 is articulated on a rigid boundary surface 2.5. Thus, for example, the flow can be shut off by the pivotable boundary surface 2.4 to the surfaces 2.2.

If e.g. the opening 1.2 of the treatment chamber 1.1 as a heating chamber is closed during heating, must be opened when cooling, the pivotable boundary surface 2.4 serves as a hatch or flap for thermal separation of the heating chamber from the pressure vessel, which is required for systems with convective heating. In systems without convective heating, this separation can act as a labyrinth.

On the other hand, it may also be useful in particular embodiments, if the flow 5 in their speed or their cross-section / volume of a position to "open" or is varied to "to" with said pivotable boundary surface in the sense of a change in the volume flow.

According to this constructive-structural representation, the method for directing the flow 5 of gases in the process of heat treatment of metallic materials / workpieces in industrial furnaces 1, in particular in treatment chambers 1.1 of vacuum furnaces, preferably single-chamber vacuum furnaces, according to the invention works such that for Strömungsvergleichmässigung and intensification of Fumigation the generated and flowing in the original flow direction 6 5 flow strikes the spaced at the distance 2.7 areas 2.2. Of these surfaces 2.2 projects beyond - seen in the flow direction 6 - a following the preceding surface 2.2 in at least one area dimension 2.6 cascade-like.

Between the surfaces 2.2, the flow 5 is directed in a deflected to the original flow direction 6 direction 7 by the effect of a stall at the upper / lower free edges 2.2.1 of the surfaces 2.2. Accordingly, the parallel spaced 2.7 and flowing surfaces 2.2 steer the flow in the direct direction to the opening 1.2., The surfaces 2.2 are flowed perpendicular to the original flow direction 6.

Overall, the generated flow 5 along the imaginary, rising in the flow direction 6 imaginary hypotenuse of the imaginary right triangle, formed by the upper / lower edges of the 2.2 2.2 2.2.2 connecting the straight lines 2.2.2, out.

Alternatively, the generated flow 5 along an imaginary rising in the flow direction curve, also formed by the upper / lower edges 2.2.1 of the surfaces 2.1.2 connecting curve not shown, are performed, the curve can be progressive or degressive.

What is decisive is that the flow 5, which runs essentially horizontally in the original flow direction 6, is guided to a direction 7, which is deflected substantially perpendicular thereto. In this case, from the original flow direction 6 by means of the cascaded areas 2.2 homogenized and homogenized partial flows then run in the deflected flow direction 7 to the batch.

It is also conceivable with a corresponding vertical arrangement of the industrial furnace 1, not shown here, that the direction of a flow, that is to say essentially vertical or falling or rising, is guided in a direction substantially horizontally distanced to it , Accordingly, then the cascade-like surfaces are to be arranged.

In general, it is provided in accordance with the method in generic industrial furnaces 1 that the flow 5 of treatment gases radially emitted by the blower 3 follows the guide surfaces 3.3 associated with the blower 3. Flowing in the axial direction of the blower 3 against the surfaces 2.2 and then deflected to areas of the openings 1.2 of the treatment chamber 1.1 is the flow 5 in at least one dimension 2.8 to the surfaces 2.2 by means of at least one boundary surface 2.4, 2.5, which is both pivotable and rigid can be constrained.

The method can be used according to these inventive functions for the application during quenching in the process of heat treatment of metallic materials / workpieces, in which case the treatment gases emitted by the blower 3 are cooling gases, the blower 3 is a cooling fan and the treatment chamber 1.1 also used as a cooling chamber becomes.

The device 2 according to the invention for carrying out the method in industrial furnaces 1 is embodied as the device 1 described in detail above as a gas-conducting device with the surfaces 2.2 which are at a distance of 2.7, one of which projects beyond the preceding surface 2.2 in at least one area dimension 2.6.

On-site, the surfaces 2.2 are bordered by the box-like frame 2.1. The surfaces 2.2 can be stabilized by at least one connecting, not shown web. The pivotable boundary surface 2.4 can be hinged to the rigid boundary surface 2.5. Thus, the flow 5 can be shut off by the pivotable boundary surface to the surfaces 2.2.

Since the opening of the treatment chamber 1.1 as heating chamber in industrial furnaces 1 is closed during heating, but must be open during cooling, the pivotable boundary surface 2.4 serves as a hatch or flap for thermal separation of the heating chamber from a pressure vessel, which is required in systems with convective heating. In systems without convective heating, this separation can also be performed as a labyrinth.

On the other hand, it may also be useful in particular embodiments if the flow 5 is steered in its velocity or its cross-section / volume from a position in position "up" or "to" with said pivotable boundary surface 2.4 in the sense of a change in the volume flow.

The arrangement of radially extending surfaces 4.1 in the region of the blower 3 support the effect according to the invention, in that they are formed by the gas-water heat exchanger 4, which reduces a swirl and thus also functions as a flow rectifier and is situated in front of the fan 3.1.

It is expedient if the angle of rise 2.9 of the cascaded areas 2.2 connecting straight line 2.2.2 or curve between 5 ° and 60 °.

The distance 2.7 between the surfaces 2.2.2 should be advantageously 10-1000 mm.

The thus formed device 2 is assigned to a respective region of the opening 1.2 of the treatment chamber 1.1, in which case a plurality of devices 2 cover the respective regions of a plurality of openings 1.2 of the treatment chamber 1.1.

The size should be dimensioned as the areal design of the device 2 so that it corresponds to the flowed through batch area, which is to be used for the design of the representative cross-section of the flow-through batch.

Industrial Applicability

In contrast to the prior art, the invention makes possible a more homogenous diversion of the flow of gases such as cooling gases in industrial furnaces, such as vacuum furnaces, which improves both the cooling intensity and the energy consumption Heat treatment of metallic materials / workpieces, so that their utility value is increased for the user industry.

LIST OF REFERENCE NUMBERS

1

= Industrial furnace

1.1

= Treatment chamber

1.2

= Opening

2

= Institution

2.1

= Frame

2.2

= Area

2.2.1

= free edge

2.2.2

= straight line

2.4

= swiveling boundary surface

2.5

= rigid boundary surface

2.6

= Area dimension

2.7

= Distance

2.8

= Dimension area

2.9

= Angle of rise

3

= Blower

3.1

= Fan wheel

3.2

= Flow outlet

3.3

= Baffles

4

= Gas-water heat exchanger

4.1

= radially arranged surfaces

5

= Flow (arrow)

6

= original flow direction (arrow)

7

= deflected flow direction (arrow)

Claims (30)

Method for conducting a flow (5) of gases in the process of heat treatment of metallic materials / workpieces in industrial furnaces (1), in particular for treatment chambers (1.1) of vacuum furnaces, preferably single-chamber vacuum furnaces, whereby a generated and unidirectional original flow ( 6) against (2.7) mutually spaced surfaces (2.2) is guided, these surfaces (2.2) are flown, the original flow (6) between the surfaces (2.2) by the effect of a stall at free edges (2.2.1) the surfaces (2.2) in the original flow direction (6) deflected flow directions (7) divided and a uniform and intensified leading gassing of a batch forming and to be treated materials / workpieces in the treatment chambers (1.1) is performed. A method according to claim 1, characterized in that seen in the original flow direction (6) the flow (5) against the preceding surface (2.2) by at least one surface dimension (2.6) by means of the free edge (2.2.1) cascade-like following surface (2.2). A method according to claim 1, characterized in that seen in the original flow direction (6) the flow (5) against the preceding surface (2.2) by at least one surface dimension (2.6) by means of the free edge (2.2.1) cascade-like following surface (2.2). Method according to one of claims 1 to 3, characterized in that in the original flow direction (6) seen the flow (5) against the parallel distance (2.7) mutually opposed surfaces (2.2) is guided. Method according to one of claims 1 to 4, characterized in that the flow (5) against the perpendicular to the original flow direction (6) stationary surfaces (2.2) is guided. Method according to one of claims 1 to 5, characterized in that the flow (5) in an original flow direction (6) in volume decreasing flow along an imaginary, equal to one through the free edges (2.2.1) seen in section, the flow (5) along an imaginary hypotenuse of an imaginary right triangle, formed by the free edges (2.2.1) of the surfaces (2.2) connecting straight line (2.2.1), is guided and said reduced in volume flow from the divided by the effect of the stall divided and deflected streams. Method according to one of claims 1 to 5, characterized in that the flow (5) is guided in an original flow direction (6) in the volume decreasing flow along an imaginary, equal to an arcuate oblique plane formed by the free edges, wherein in Section seen the flow (5) along an imaginary curve formed by the free edges (2.2.1) of the surfaces (2.2) connecting curve is guided, and said reduced in volume flow from the divided by the effect of the stall and deflected partial flows results. Method according to one of claims 1 to 5 and 7, characterized in that the imaginary curve is progressive or degressive. Method according to one of Claims 1 to 8, characterized by the flow (5) emitted by a blower (3) which follows the guide surfaces (3.3) associated with the blower (3) and thus in the axial direction of the blower (3) against the surfaces (2.2 ) and then deflected to at least one area of at least one opening (1.2) of the treatment chamber (1.1) is guided. Method according to one of claims 1 to 9, characterized in that the flow (5) in at least one dimension region (2.8) to the surfaces (2.2) by means of at least one boundary surface (2.4, 2.5) is constrained. Method according to one of claims 1 to 10, characterized in that the flow (5) is forcibly guided on pivotable boundary surfaces (2.4). Method according to one of claims 1 to 11, characterized in that the flow (5) is shut off by the pivotable boundary surface (2.4) to the surfaces (2.2). Method according to one of claims 1 to 11, characterized in that the flow (5) through the pivotable boundary surface (2.4) in their speed or their cross-section / volume of a position to "up" or to "to" in the sense of a change the volume flow is performed. Method according to one of claims 1 to 13, characterized by the use during quenching in the process of heat treatment of metallic materials / workpieces, wherein the gases discharged from the blower (3) are cooling gases, the blower (3) is a cooling blower and the treatment chamber (1.1) is also used as a cooling chamber. Device (2) for carrying out the method in industrial furnaces (1) and for conducting the flow (5) of gases in the process of heat treatment of metallic materials / workpieces, in particular for treatment chambers (1.1) of vacuum furnaces, preferably single-chamber vacuum furnaces, designed as a gas-conducting device comprising, in a frame (2.1) at a distance (2.7) to each other standing, flowable surfaces 2.2) with free edges (2.2.1), which can tear off the flow (5), and the original flow direction (6) in between the surfaces (2.2) divides deflected flow directions (7). Means (2) according to claim 15, characterized in that a following projects over the preceding surface (2.2) in at least one surface dimension (2.6) like a cascade by means of free edges (2.2.1). Device according to claim 15 or 16, characterized in that the surfaces (2.2) at a parallel distance (2.7) to each other. Device (2) according to any one of claims 15 to 17, characterized in that the free edges (2.2.1) - as seen in section - an imaginary straight line (2.2.2) follow an inclined plane, said an imaginary hypotenuse in to form an imaginary right-angled triangle. Device (2) according to one of claims 15 to 18, characterized in that the free edges (2.2.1) - as seen in section - follow an imaginary curve. Device (2) according to one of claims 15 to 17 and claim 19, characterized in that the curve is progressive or degressive. Device (2) according to one of claims 15 to 20, characterized in that the surfaces (2.2) of one, a box-like frame (2.1) are enclosed. Device (2) according to one of claims 15 to 21, characterized by at least one web connecting the surfaces (2.2). Device (2) according to one of claims 15 to 22, characterized by a pivotable boundary surface (2.4). Device (2) according to one of claims 15 to 22, characterized by a rigid boundary surface (2.5). Device (2) according to any one of claims 15 to 24, characterized by the arrangement of radially arranged surfaces (4.2) in the region of a blower (3), of a, a swirl reducing, acting as a flow straightener and in the range of action of a fan wheel (3.1) located Gas-water heat exchanger (4) are formed. Device (2) according to one of claims 15 to 25, characterized in that a rise angle (2.9) of the cascade-like surfaces (2.2) is between 5 ° and 60 °. Device (2) according to one of claims 15 to 26, characterized in that the distance (2.7) between the surfaces (2.2) is 10-1000 mm. Device (2) according to one of claims 15 to 27, characterized in that it is assigned as a gas-conducting device to a region of an opening (1.2) of the treatment chamber (1.1). Device (2) according to one of claims 15 to 28, characterized in that a plurality of gas-conducting devices are assigned to a respective region of a plurality of openings (1.2) of the treatment chamber (1.1). Device (2) according to one of claims 15 to 29, characterized in that the size is dimensioned as the areal design of the gas-conducting device so that it corresponds to the flow-through batch area, wherein for dimensioning the cross-section of the flow-through batch can be used.

Images