Regenerative separator for separating impurities from an air stream

Abstract

To provide an improved carousel type regenerative separating device which has the better filter efficiency.SOLUTION: An improved regenerative separating device (10) for separating impurities from an airflow (23), in particular a process exhaust airflow, provides a better distribution of the airflow in an annular gap (16) between a rotary separating unit (14) comprising a plurality of filter blocks (15) for adsorbing impurities from the airflow and a circumferential wall of a housing (11) incorporating the rotary separating unit (14). The airflow inlet (22) provided in the circumferential wall for introducing the airflow into the annular gap (16) and a regeneration system (26, 28) for regenerating the filter blocks (15) of the rotary separating unit (14) by a regenerating stream (27) passing through the filter blocks to desorb impurities adsorbed in the filter blocks (15) are both positioned in the same circumferential sector of maximum 180 degrees.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] background The present invention relates to a regenerative separator for separating impurities from gas streams, particularly process exhaust streams, and in particular to a carousel-type regenerative separator. Such separators may be used, for example, to separate organic solvents from solvent-containing process exhaust streams, for example for use in industrial surface treatment plants. [Background technology]

[0002] A conventional carousel-type regenerative separation apparatus includes a rotary separation unit including a plurality of filter blocks for adsorbing impurities from an airflow passing through the filter blocks in a radial direction of the separation unit, and a cubic housing for incorporating the separation units in an annular gap between a circumferential wall of the housing and the separation units, the housing having an airflow inlet provided in its circumferential wall for introducing the airflow into the annular gap, and the separation apparatus further includes a regeneration system for regenerating the filter blocks of the rotary separation unit with a regeneration flow passing radially through the filter blocks to desorb the impurities adsorbed thereon.

[0003] As disclosed in, for example, US 5,788,744 A and US 2018 / 0345205 A1, the regeneration system is typically located opposite the airflow inlet. The inventors of the present invention found that in those conventional separation devices, the airflow entering the annular gap mainly loads the front part of the rotary separation unit facing the airflow inlet, which results in a limitation of the filter efficiency of the separation unit. Summary of the Invention [Problem to be solved by the invention]

[0004] summary SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved carousel-type regenerative separator having better filter efficiency. [Means for solving the problem]

[0005] This object is achieved by the teaching of the independent claims. Particularly preferred configurations of the invention are the subject of the dependent claims.

[0006] According to the present invention, there is provided a regenerative separation apparatus for separating impurities from an air flow, particularly a treated exhaust air flow, comprising: a rotary separation unit defining a radial direction and a circumferential direction and comprising a plurality of filter blocks, the plurality of filter blocks receiving impurities from the air flow radially passing through the filter blocks; a housing incorporating the rotary separation units in an annular gap between a circumferential wall of the housing and the rotary separation units, the housing having an air flow inlet provided in its circumferential wall for introducing an air flow into the annular gap; and a regeneration system for regenerating the filter blocks of the rotary separation unit with a regeneration flow radially passing through the filter blocks to remove impurities received in the filter blocks, wherein both the air flow inlet and the regeneration system are arranged in the same circumferential region of up to 180 degrees.

[0007] Locating both the airflow inlet and the regeneration system in the same circumferential area of ​​up to 180 degrees, i.e., on the same side of the rotary separation unit, rather than in opposite directions, allows for a more uniform distribution of the airflow in the annular gap and a more uniform loading of the filter blocks of the rotary separation unit. This opens up various possibilities for achieving higher loads and resulting in better filter efficiency in the separation unit. Improved filter efficiency helps reduce impurity (e.g., organic solvent) emissions and meets state regulations.

[0008] Additionally, the proposed structure also opens up various possibilities for simplifying the construction of the regenerative separation device, which reduces the complexity and cost of assembly and maintenance.

[0009] The airflow inlet and the regeneration system are both positioned at the same circumferential distance of up to 180 degrees, preferably up to 150 degrees, and more preferably up to 120 degrees. In some embodiments, they are positioned at the same circumferential distance of up to 90 degrees or up to 45 degrees. In some embodiments, they are positioned within about ±5 degrees of each other.

[0010] Preferably, the regeneration flow passes through the filter blocks of the separation unit in a radial direction opposite to the radial flow of the airflow passing through the filter blocks, and in this case the regeneration flow has a regeneration outlet on the face of the separation unit facing the circumferential wall of the housing, and is therefore located in the same circumferential zone, up to 180 degrees, as the airflow inlet in the circumferential wall of the housing.

[0011] In the filter block of the rotary separation unit, impurities (e.g., organic solvents) contained in the air stream may physically adhere as they pass through it. The filter block is preferably configured to adsorb or absorb such impurities. For this purpose, the filter block preferably comprises activated carbon, zeolite, or another suitable filter material. The regeneration stream is preferably hot air, preferably at a temperature in the range of about 140°C to 450°C.

[0012] Preferably, the housing is a cylindrical housing, which allows for a much more uniform distribution of the air flow in the annular gap, resulting in a better filter efficiency of the separation unit and a simplified construction of the regenerative separation device.

[0013] In some embodiments, the airflow inlet and the regeneration system may overlap one another in the circumferential direction. In such a configuration, the airflow inlet is preferably configured to radially introduce airflow into the annular gap between the circumferential wall of the housing and the rotary separation unit. In this aspect, the regeneration system, and in particular the regeneration outlet, can function as a diverter to direct the airflow forward, further spreading it into the annular gap between the separation unit and the circumferential wall of the housing, resulting in a more evenly distributed passage of airflow through the filter block.

[0014] In some embodiments, the airflow inlet and the regeneration system may be positioned adjacent to one another in the circumferential direction. In such a configuration, the airflow inlet is preferably configured to introduce the airflow tangentially into the annular gap between the circumferential wall of the housing and the rotary separation unit. The tangentially incoming airflow causes the airflow to avoid impinging on the rotary separation unit forward, but to continue into the annular gap between the separation unit and the circumferential wall of the housing, resulting in a more evenly distributed passage of the airflow through the filter block. Preferably, the airflow is introduced into the annular gap tangentially away from the regeneration system. In this manner, insulation means can be reduced because there is a clearer thermal separation between the airflow and the regeneration system.

[0015] In some embodiments, the annular gap between the circumferential wall of the housing and the rotary separating unit may have a tapered width in the radial direction that narrows in a direction away from the airflow inlet. Preferably, this is achieved by the cylindrical axis of the cylindrical housing and the rotation axis of the rotary separating unit being offset from each other. With an annular gap having a tapered width, the force with which the airflow enters the filter block is smaller near the airflow inlet and increases with the distance from the airflow inlet. The airflow is therefore spread further into the annular gap between the separation unit and the circumferential wall of the housing, resulting in a more evenly distributed passage of the airflow through the filter block.

[0016] In some embodiments, the airflow inlet may be provided with at least one baffle to guide the airflow. Preferably, depending on the particular configuration and arrangement of the airflow inlet, the airflow is guided in a manner that supports the above-mentioned effect of spreading the airflow further into the annular gap between the separation unit and the circumferential wall of the housing.

[0017] In some embodiments, the regeneration system may include a regeneration outlet for discharging the regeneration flow that has passed through the filter block divided into two sections in the circumferential direction for discharging a first partial regeneration flow and a second partial regeneration flow. Preferably, the regeneration outlet includes a partition configured to variably control the widths of the two sections. Preferred variations and advantages of this configuration are disclosed in detail in, for example, US2017 / 0266606A1 and US2018 / 0345205A1.

[0018] In some embodiments, the rotary separation unit may include a rotor cage for mounting multiple filter blocks. In accordance with the concepts of the present invention, the configuration of this rotor cage may be simplified. For example, it may be assembled with fewer components (e.g., only three) compared to the rotor cage design of a conventional regenerative separation device.

[0019] In some embodiments, the rotary separation unit may be rotated by a drive system comprising a chain and sprockets. The inventive concept allows for such a simplified and efficient drive system, as compared to, for example, geared beds driven by pinion drive gears often used in conventional regenerative separation devices.

[0020] In some embodiments, the regenerative separation apparatus may further include a cooling system for directing a cooling airflow radially through the filter blocks, the cooling system being disposed between the regeneration system and the airflow inlet in the direction of rotation of the rotary separation unit, such that after the regeneration process, the filter blocks of the rotary separation unit are cooled from the elevated regeneration temperature to a temperature range suitable for receiving impurities from the airflow.

[0021] In some embodiments, the enclosure may include only two doors for inspection access, located in the same circumferential zone of up to 180 degrees as the airflow inlet and regeneration system. The inventive concept allows for fewer inspection accesses compared to such conventional regenerative separators, particularly because all parts to be inspected are located on the same side of the separator.

[0022] Any feature described above in connection with any one embodiment may be used in combination with one or more features of any other embodiment, or in any combination with the other embodiments.

[0023] According to another aspect of the invention, a system for separating impurities from a gas stream, particularly a process exhaust stream, comprises a regenerative separation apparatus according to the invention as described above, and a cleaning apparatus for extracting impurities from the regenerated stream.

[0024] Preferably, the cleaning apparatus comprises a gas turbine assembly configured for regenerative thermal oxidation (RTO), direct thermal oxidation (TO), recuperative catalytic oxidation (CO), regenerative catalytic oxidation (RCO), condensation, or the like, or having a combustion appliance for combusting combustible components contained in the regeneration stream.

[0025] The regenerative separation device of the present invention and the system of the present invention described above can be used particularly advantageously in industrial surface treatment plants for treating the surfaces of products. Preferably, they can be used in paint plants for painting vehicle parts, such as car bodies, where organic solvents can be separated from paint exhaust. Furthermore, the present invention can be used advantageously in all cases where exhaust gases / exhaust gases containing oxidizable pollutants, such as mine gases, exhaust gases from biogas or waste incineration plants, air from paint plants or plastic processing plants containing small amounts of VOCs, etc.

[0026] The above and further features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a schematic top view illustrating the principle of a regenerative separation device according to the present invention; [Figure 2] FIG. 10 is a schematic top view showing the principle of a conventional regenerative separation device for comparison. [Figure 3] 1 is a schematic top view of a regenerative separation device according to a first embodiment of the present invention; [Figure 4] 1 is a perspective view of a regenerative separation device according to a first embodiment of the present invention; [Figure 4A] 5 is a perspective view of a variation of the regenerative device of FIG. 4 in accordance with the present invention. [Figure 5] FIG. 5 shows details of a rotary separation unit for the regenerative separation apparatus shown in FIG. 4. [Figure 6] FIG. 5 shows details of the drive system for the rotary separating unit of the regenerative separating apparatus shown in FIG. 4. [Figure 6A] FIG. 4B shows details of the drive system for the rotary separating unit of the regenerative separating apparatus shown in FIG. 4A. [Figure 7] FIG. 2 is a schematic top view of a regenerative separation device according to a second embodiment of the present invention. [Figure 8]FIG. 4 is a schematic top view of a regenerative separation device according to a third embodiment of the present invention. [Figure 9] FIG. 9 is a schematic perspective view of the regenerative separation device shown in FIG. 8. [Figure 10] FIG. 10 is a schematic top view of a regenerative separation device according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] Detailed Description First, the principle of the inventive concept will be explained with reference to Fig. 1. For better understanding, the inventive concept can also be contrasted with the conventional concept shown in Fig. 2.

[0029] The process exhaust stream (e.g., solvent-containing painting exhaust) is directed to a separation device to separate out impurities (e.g., organic solvents). The purified process exhaust stream in the separation device is then released and produced, for example, as so-called clean air, into the environment or returned to the process.

[0030] The separation apparatus 10 is a carousel-type regenerative separation apparatus including a cylindrical housing 11 having a circumferential wall 12 and a central cylindrical shaft 13. The separation apparatus 10 further includes a rotary separation unit 14 including a plurality of filter blocks 15 and having an axis of rotation 19 and a direction of rotation 20. The rotary separation unit 14 also defines a radial direction 18r and a circumferential direction 18c. As shown in FIG. 1 , an annular gap 16 is formed between the circumferential wall 12 of the housing 11 and the rotary separation unit 14.

[0031] The housing 11 includes an airflow inlet 22 for introducing a treated exhaust air flow 23 into the annular gap 16 between the circumferential wall 12 and the rotary separation unit 14. From the annular gap 16, the airflow 23 passes in a radial direction 18r through a filter block 15 of the rotary separation unit 14. The filter block 15 of the rotary separation unit 14 is configured to adsorb or absorb impurities from the airflow 23. The filter block 15 may include a filter material, such as an activated carbon. The filter block 15 may contain charcoal or zeolite. The filter block 15 may be formed of an extruded material and may have parallel flow channels, for example as disclosed in U.S. Pat. No. 5,693,123 A. After passing through the filter block 15, the clean air is discharged through an airflow outlet 24, for example located in a central region of the top surface of the housing 11.

[0032] 1 , the separation apparatus 10 further includes a regeneration system including a regeneration inlet 26 for introducing a regeneration stream (e.g., hot air) 27 and a regeneration outlet 28 for discharging the regeneration stream after passing through the filter block 15 of the rotary separation unit 14. The regeneration inlet 26 is located, for example, in a central region of the top surface of the housing 11, and the regeneration outlet 28 is located on the outer surface of the rotary separation unit 14 opposite the circumferential wall 12 of the housing 11. Thus, the regeneration stream 27 passes through the filter block 15 of the rotary separation unit 14 in a radial direction 18r opposite to the air stream 23 radially passing through the filter block 15. The regeneration stream 27 desorbs impurities adsorbed by the filter block 15 from the air stream 23.

[0033] Preferably, the separating device 10 further comprises a cooling system including a cooling airflow inlet 30 for introducing a cooling airflow 31 and a cooling airflow outlet 32 ​​for discharging the cooling airflow 31. The cooling airflow outlet 32 ​​is located, for example, in a central region of the top surface of the housing 11, and the cooling airflow inlet 30 is installed on the outer surface of the rotary separation unit 14 facing the circumferential wall 12 of the housing 11. Thus, the cooling air flow 31 passes through the filter blocks 15 of the rotary separation unit 14 in the radial direction 18r opposite to the regeneration flow 27 passing through the filter blocks 15. The cooling system is provided adjacent to the regeneration system, in particular after the regeneration system in the direction of rotation 20 of the rotary separation unit 14, to cool the filter blocks 15 after the regeneration process.

[0034] 1, the separation device 10 has a separation zone S, a regeneration zone R, and a cooling zone C, each configured in a sector shape, with the area of ​​the regeneration zone R being significantly smaller than that of the separation zone S, and the area of ​​the cooling zone C being smaller than that of the regeneration zone R. The separation device 10 is operated continuously, i.e., the rotary separation unit 14 and its filter block 15 pass through the separation zone S, the regeneration zone R, and the cooling zone C successively in the direction of rotation 20.

[0035] Functionally, the operation and applicability of this type of regenerative separation device is well known to those skilled in the art (see, for example, US2017 / 0266606A1, US2018 / 0345205A1, US5,788,744A, US5,693,123A), and therefore a more detailed description thereof will be omitted here.

[0036] In accordance with the present invention, the airflow inlet 22 and the regeneration system, particularly the regeneration outlet 28, are both located on the same side of the rotary separating unit 14 / separator 10, i.e., within the same circumferential zone of up to 180 degrees. If present, the cooling system, particularly the cooled airflow outlet 32, is also located on the same side of the rotary separating unit 14 / separator 10 as the airflow inlet 22 and the regeneration system.

[0037] The placement of the airflow inlet 22 and the regeneration systems 26, 28, both on the same side of the rotary separating unit 14, results in a more uniform distribution of the airflow 23 in the annular gap and a more uniform loading on the filter blocks 15. Therefore, better filter efficiency of the rotary separating unit 14 can be achieved.

[0038] For comparison, a conventional separation device concept is shown in Figure 2. Corresponding components are given the same reference numerals as in Figure 1, with the addition of an apostrophe.

[0039] The main difference between the inventive concept shown in FIG. 1 and the conventional concept shown in FIG. The design and location of the regeneration and cooling systems. In the conventional separator 10', the housing 11' is cubic (rather than cylindrical). The regeneration systems 26', 28' and the cooling systems 30', 32' are located adjacent to each other on the side of the separator 10' opposite the airflow inlet 22' (rather than on the same side). As a result, the airflow 23' entering the annular gap 16' between the circumferential wall 12' of the housing 11' and the rotary separator unit 14' strikes the separator unit 14' in a forward direction, so that the front portion of the separator unit 14' facing the airflow inlet 22' is filled / saturated with more impurities than the rear portion.

[0040] With reference to Figures 3 to 6, a first embodiment of the separation device 10 of the invention will now be described in more detail by way of example.

[0041] In this embodiment, the housing 11 and the rotary separating unit 14 are arranged coaxially with each other, i.e., the cylindrical axis 13 of the housing 11 and the rotation axis 19 of the rotary separating unit 14 coincide with each other. Thus, the annular gap 16 has a constant width around the entire circumference.

[0042] Furthermore, in this embodiment, the airflow inlet 22 overlaps with the regeneration system and the cooling system. In particular, the regeneration outlet 28 and the cooling airflow inlet 30 are located within the area of ​​the airflow inlet 22 in the circumferential direction 18c. As a result, the treated exhaust air flow 23 entering the annular gap 16 through the airflow inlet 22 encounters the regeneration outlet 28 and the cooling airflow inlet 30, and is thereby further deflected into the annular gap 16 in both directions (toward and against the rotation direction of the rotary separation unit 14). Thus, the airflow 23 is more uniformly distributed in the annular gap 16.

[0043] As a result of the inventive concept, the construction of the separator 10 can be simplified in several respects compared to conventional separators.

[0044] 5, the rotary separation unit 14 includes a rotor cage 38 for providing a plurality of filter blocks 15. The rotor cage 38 can be made of, for example, only three components 38a, 38b, and 38c.

[0045] Also, the desired number of vertical seals can be reduced to, for example, 10, whereas conventional designs require, for example, about 48 seals.

[0046] As suggested by Figures 4 and 6, only two doors 36 are required for inspection access. Because all inlets 22, 30 and outlets 28 are located on the same side of the separation apparatus 10, all operation and shutdown maintenance can be performed from one side of the apparatus 10, simplifying the access design. In contrast, a conventional separation apparatus 10' having a cubic enclosure 11' requires multiple access hatches and doors.

[0047] Furthermore, the structure of the drive system for rotating the rotary separating unit 14 can be simplified. As shown in Figure 6, the drive system is formed by a chain 44 driven by a sprocket 45, which is driven by a drive mechanism 46. The rotor cage 38 of the rotary separating unit 14 is supported by a central axle box 40 and several support bearings 42. This structure of the drive system is simpler than, for example, a geared bottom plate driven by a pinion gear used in conventional separating devices.

[0048] 4 and 6 mentioned above show as an example a first variant of the first embodiment of the separating device 10 of the present invention, in which the housing 11 and the rotary separating unit 14 are mounted on a polygonal base 34, the edge of which protrudes from the circumferential wall 12 of the preferably cylindrical housing 11. Furthermore, FIGS. 4A and 6A show the first variant of the separating device 10 of the present invention. A second variant of the embodiment is shown as an example, in which the housing 11 and the rotary separation unit 14 are mounted on a circular base 34, and the edge of the base 34 may be located below the circumferential wall 12 of the cylindrical housing 11 or may protrude from the circumferential wall 12.

[0049] FIG. 7 shows a schematic diagram of a second embodiment of a separation device 10 according to the concepts of the present invention. The separating device 10 according to this embodiment differs from the first embodiment in that the cylindrical axis 13 of the cylindrical housing 11 is offset with respect to the rotation axis 19 of the rotary separating unit 14. As a result, the annular gap 16 between the circumferential wall 12 of the housing 11 and the rotary separating unit 14 has a gradually decreasing width in the radial direction 18r that narrows in the direction away from the air flow inlet 22.

[0050] The tapered gap 16, especially the uniformly tapered gap 16, improves the flow guidance of the airflow 23 towards the filter blocks 15. In the region near the airflow inlet 22, the relatively large width of the annular gap 16 results in very little fluid pressure acting on the airflow towards the filter blocks 15 of the separation unit 14. Thus, a large portion of the airflow 23 is further guided towards the annular gap 16. The uniform flow distribution of the airflow 23 towards the filter blocks 15 allows for more efficient operation of the separation device 10.

[0051] 8 and 9 illustrate generally a third embodiment of a separation device 10 in accordance with the concepts of the present invention.

[0052] The separation device 10 according to this embodiment differs from the first and second embodiments, in particular in that the airflow inlet 22 is offset in the circumferential direction 18c relative to the regeneration system (inlets 26 and outlets 28) and the cooling system (inlets 30 and outlets 32). Thus, the airflow inlet 22 and the regeneration systems 26, 28 are arranged in the same circumferential zone of up to about 45 degrees, and the airflow inlet 22 is configured to introduce the airflow 23 tangentially (rather than forward) into the annular gap 16. The annular gap 16 tapers continuously throughout the separation zone, resulting in a more uniform airflow 23 to the filter blocks 15.

[0053] In this embodiment, the gas stream 23 does not hit the regeneration outlet 28. Therefore, a clearer thermal separation between the "cold" filtering / adsorption and the "warm" regeneration / desorption can be achieved. Therefore, insulation measures can be reduced.

[0054] FIG. 10 illustrates a schematic diagram of a fourth embodiment of a separation device 10 according to the concepts of the present invention. The separating device 10 according to this embodiment differs from the third embodiment in that at least one baffle 50 is provided at the air inlet 22 for guiding the air flow 23. By means of this at least one baffle 50, the flow guidance of the air flow 23 into and in the annular gap 16 is influenced and improved, making it possible to achieve an even more uniform distribution of the air flow 23 on the filter blocks 15.

[0055] Optionally, the baffle 50 may be configured to be variably controlled. 22 may optionally be configured such that the flow area can be variably controlled.

[0056] The embodiments of separation apparatus 10 described above may be used in a system including separation apparatus 10 and a cleaning apparatus for extracting impurities from regeneration stream 27. Such a system is disclosed, for example, in US 2017 / 0266606 A1.

[0057] In the above embodiment, the regeneration system includes one regeneration outlet 28 for discharging the entire regeneration flow 27 that has passed through the filter block 15. In a variation of the embodiment, the regeneration outlet 28 is arranged in a circumferential direction 1 axially to discharge the first partial regeneration flow and the second partial regeneration flow. 8c, the regeneration outlet 28 may be divided into two sections. In this configuration, the regeneration outlet 28 preferably includes a partition configured to variably control the width of the two sections. The features and advantages of such a regeneration system are discussed in detail, for example, in US 2017 / 0266606 A1.

[0058] The above-described embodiments should be understood as illustrative examples of embodiments of the present invention. Further embodiments of the present invention may be apparent to those skilled in the art given the present disclosure. The scope of the present invention is not limited by the above-described exemplary embodiments, nor by the following claims. [Explanation of symbols]

[0059] List of reference numbers 10 Separation device 11 (cylindrical) housing 12 11 circumferential wall 13 Cylindrical shaft 14 Rotary Separation Unit 15 Filter Blocks 16 Annular gap 18c circumferential direction 18r radial direction 19 14 rotation axes 20 14 rotation direction 22 Airflow inlet for introducing airflow 23 Airflow, especially process exhaust airflow 24 Airflow outlet for releasing clean air 26 Regeneration inlet for introducing regeneration flow 27 Regeneration flow 28 Regeneration outlet for discharging the regeneration flow 30 Cooling airflow inlet for introducing cooling airflow 31 Cooling airflow 32 Cooling airflow outlet for discharging cooling airflow 34 base 36 Doors as inspection access 38 Rotor Cage 38a, b, c Rotor cage parts 40 axle box 42 Support bearing 44 Chain 45 sprocket 46 Drive mechanism 50 Baffle / Air guide plate

Claims

1. A regenerative separation device (10) for separating impurities from a gas stream (23), particularly a process exhaust stream, comprising: a rotary separation unit (14) defining a radial direction (18r) and a circumferential direction (18c) and including a plurality of filter blocks (15), each filter block (15) configured to receive impurities from an airflow (23) passing through the filter blocks (15) in the radial direction (18r); a housing (11) incorporating the rotary separating unit (14) in an annular gap (16) between a circumferential wall (12) of the housing (11) and the rotary separating unit (14), the housing (11) having an air inlet (22) provided in the circumferential wall (12) for introducing an air flow (23) into the annular gap (16); a regeneration system (26, 28) for regenerating the filter block (15) of the rotary separation unit (14) by a regeneration flow (27) passing through the filter block (15) in the radial direction (18r) to remove impurities received in the filter block (15); the airflow inlet (22) and the regeneration system (26, 28) are both arranged in the same circumferential area of ​​up to 180 degrees; The regenerative separation device, wherein the housing (11) has exactly two doors (36) for inspection access, and the two doors (36) are arranged in the same circumferential area of ​​up to 180 degrees as the air flow inlet (22) and the regeneration system (26, 28).

2. 2. The regenerative separating device according to claim 1, wherein the housing (11) is a cylindrical housing.

3. the airflow inlet (22) and the regeneration system (26, 28) overlap each other in the circumferential direction (18c); 3. The regenerative separating device according to claim 1 or claim 2, wherein the air flow inlet (22) is configured to introduce an air flow (23) radially into the annular gap (16) between the circumferential wall (12) of the housing (11) and the rotary separating unit (14).

4. the airflow inlet (22) and the regeneration system (26, 28) are disposed adjacent to each other in the circumferential direction (18c); 3. The regenerative separating device according to claim 1 or claim 2, wherein the air flow inlet (22) is configured to introduce an air flow (23) tangentially into the annular gap (16) between the circumferential wall (12) of the housing (11) and the rotary separating unit (14).

5. 5. The regenerative separation device according to claim 1, wherein the annular gap (16) between the circumferential wall (12) of the housing (11) and the rotary separation unit (14) has a gradually decreasing width in the radial direction (18r) that narrows in a direction away from the air flow inlet (22).

6. The cylindrical housing (11) has a cylindrical axis (13), and the rotary separation unit (14) has a rotation axis (19); 6. A regenerative separating device according to claim 5, wherein the cylinder axis (13) and the rotation axis (19) are offset from one another.

7. The regenerative separator according to any one of claims 1 to 6, wherein the airflow inlet (22) is provided with at least one baffle (50) for guiding the airflow (23).

8. The regenerative separating device according to any one of claims 1 to 7, wherein the rotary separating unit (14) comprises a rotor cage (38) for mounting the plurality of filter blocks (15).

9. A regenerative separating device according to any one of claims 1 to 8, wherein the rotary separating unit (14) is rotated by a drive system comprising a chain (44) and sprockets (45).

10. 10. The regenerative separation device of claim 1, further comprising a cooling system (30, 32) directing a cooling airflow (31) through the filter block (15) in the radial direction (18r), the cooling system (30, 32) being positioned between the regenerative system (26, 28) and the airflow inlet (22) in the direction of rotation (20).

11. 1. A system for separating impurities from an air stream, particularly a process exhaust air stream, comprising: A regenerative separation device (10) according to any one of claims 1 to 10; a cleaning device for extracting impurities from the regeneration stream.

12. 12. The system of claim 11, wherein the cleaning device comprises a gas turbine assembly configured for regenerative thermal oxidation (RTO), direct thermal oxidation (TO), recuperative catalytic oxidation (CO), regenerative catalytic oxidation (RCO) or condensation, or having a combustion appliance for combusting combustible components contained in the regeneration stream (27).

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