Rotary separator for separating particles from a gas flow

Abstract

Rotary separator (10) for separating liquid and / or solid particles from a gas flow, with - a separator housing (12); - a separator rotor (14) arranged in the separator housing (12) and rotatably driven, which is permeable to the gas flow for particle separation and has an outlet section (48) along which the gas flow from the separator rotor (14) flows out onto a clean gas side (26) of the rotary separator (10); and - a clean gas outlet (28) for diverting the gas flow after particle separation from the rotary separator (10); characterized in that the cross-section (Q1, Q2) of the outer contour (30) of the separator rotor (14) changes at least along a partial area of ​​the outflow section (48) in the axial direction (A).

Description

[0001] The invention relates to a rotary separator for separating liquid and / or solid particles from a gas flow, comprising a separator housing, a separating rotor arranged in the separator housing and rotatably driven, through which the gas flow for particle separation can flow and which has an outflow section along which the gas flow flows out of the separating rotor on a clean gas side of the rotary separator, and a clean gas outlet for discharging the gas flow from the rotary separator after particle separation has taken place.

[0002] During operation of a rotary separator, particles are thrown from the separator rotor onto a peripheral wall of the separator housing and from there directed toward a particle outlet. A rotary separator is known from the publication DE 10 2011 009 741 A1 in which the distance between the outer circumference of the rotor and the inner circumference of the peripheral wall decreases in the direction of the clean gas flow toward the clean gas outlet. The decreasing distance between the outer circumference of the rotor and the inner circumference of the peripheral wall leads to an increase in the flow velocity of the clean gas. Due to the higher flow velocity of the clean gas, the probability increases that particles on the clean gas side will be caught by the clean gas flow and entrained toward the clean gas outlet.Thus, the reduction in distance between the outer circumference of the rotor and the inner circumference of the circumferential wall in the direction of the clean gas flow towards the clean gas outlet counteracts the discharge of particles towards a particle outlet.

[0003] The object underlying the invention is therefore to adapt the flow velocities occurring in a separator housing of a rotary separator on the clean gas side in such a way that the probability of already separated particles being entrained by the clean gas flow in the direction of the clean gas outlet is reduced.

[0004] The object is achieved by a rotary separator of the type mentioned at the outset, wherein the cross section of the outer contour of the separating rotor of the rotary separator according to the invention changes in the axial direction at least along a partial region of the outflow section.

[0005] By changing the cross-section of the outer contour of the separator rotor in the axial direction, at least along a portion of the discharge section, the gas flow slows down after exiting the separator rotor, reducing the risk of particles being entrained toward the clean gas outlet. A further advantage is that particles escaping in the discharge section of the separator rotor are accelerated toward the particle outlet of the rotary separator due to centrifugal forces before being thrown off the separator rotor toward the peripheral wall. The particle removal function is therefore improved by the change in cross-section.

[0006] In a preferred embodiment of the rotary separator according to the invention, the cross-section of the outer contour of the separation rotor decreases at least along the partial region of the outflow section in the axial direction toward the clean gas outlet. The cross-sectional reduction in the axial direction toward the clean gas outlet can be a continuous cross-sectional reduction. The cross-sectional reduction can also be quasi-continuous, for example, if the outer contour of the separation rotor has a stepped contour when viewed in detail, for example due to separation plates stacked one above the other. The outer contour of the separation rotor can have an angle of inclination relative to the axis of rotation of the separation rotor, wherein the angle of inclination is preferably between 2 degrees and 30 degrees, more preferably between 2 degrees and 20 degrees.

[0007] The rotary separator according to the invention is further advantageously developed in that the outer contour of the separator rotor has a tapered and / or conical shape, at least along a partial region of the outflow section. The separator rotor can, for example, have a truncated cone shape. The taper angle or cone angle is preferably between 2 degrees and 30 degrees, more preferably between 2 degrees and 20 degrees.

[0008] Furthermore, a rotary separator according to the invention is preferred which has a circumferential wall. The circumferential wall surrounds the separation rotor at least in part, wherein the radial distance between the outer contour of the separation rotor and the circumferential wall increases at least along a partial region of the outflow section in the axial direction towards the clean gas outlet. The circumferential wall can be a component of the separator housing. Alternatively, the circumferential wall can also be formed separately from the separator housing, for example as a housing insert which is inserted into the separator housing. The circumferential wall can have a cylindrical basic shape. The circumferential wall can taper conically or widen conically along the partial region of the outflow section in the axial direction towards the clean gas outlet. The circumferential wall can be equipped with structures for improved discharge of the particles in the direction of the particle outlet.The peripheral wall can, for example, have one or more particle discharge channels, via which the particles thrown off by the separator rotor can be discharged in the direction of the particle outlet.

[0009] In a further preferred embodiment of the rotary separator according to the invention, the rotary separator is designed as a disc separator. The separator rotor can comprise a disc stack with several separator discs arranged one above the other for separating the particles from the gas flow flowing through the separator rotor.

[0010] Furthermore, a rotary separator according to the invention is advantageous in which the separating plates have different plate sizes, with the plate size decreasing at least along the partial region of the outflow section in the axial direction toward the clean gas outlet. The plate size can, for example, decrease continuously in the axial direction toward the clean gas outlet. Alternatively, the plate stack can also have several partial stacks, with the separating plates of one partial stack having the same plate size, while the plate sizes of the plates of different partial stacks differ from one another.

[0011] The rotary separator according to the invention is further advantageously developed in that the separator rotor has a contour extension extending at least partially radially outwardly of the disc stack, which defines the outer contour of the separator rotor at least in sections. The contour extension can be connected to the disc stack in a force-fitting and / or form-fitting manner and / or by a material connection. The contour extension can be formed, for example, by one or more material webs, one or more ring structures, and / or one or more cages.

[0012] In another preferred embodiment of the rotary separator according to the invention, the rotary separator is designed as a fiber separator and the separating rotor comprises a fiber medium for separating the particles from the gas flow flowing through the separating rotor.

[0013] The rotary separator according to the invention is advantageously further developed in that the fiber medium or a separation structure formed from the fiber medium has a tapered and / or conical outer contour. The fiber medium can have a constant or varying material thickness in the radial direction. The separation structure formed from the fiber medium can have a constant or varying structural thickness in the radial direction.

[0014] Furthermore, a rotary separator according to the invention is advantageous in which the separator rotor has a contour extension extending at least partially radially outwardly of the fiber medium, which at least partially defines the outer contour of the separator rotor. The contour extension can be connected to the fiber medium or a support structure of the fiber medium in a force-fitting and / or form-fitting and / or material-fitting manner. The contour extension can be formed, for example, by one or more material webs, one or more ring structures, and / or one or more cages.

[0015] The rotary separator can be used in a process for separating liquid and / or solid particles from a gas flow. Within the process, a separation rotor arranged in a separator housing of the rotary separator is driven in rotation, so that the gas flow flows through the separation rotor for particle separation. The gas flow exits the separation rotor along an outflow section of the separation rotor on a clean gas side of the rotary separator. After particle separation, the gas flow is discharged from the rotary separator via a clean gas outlet of the rotary separator.

[0016] As part of the process, the gas flow on the clean gas side of the rotary separator is slowed by increasing the free flow cross-section. This reduces the risk of particles already separated by the separator rotor being entrained by the clean gas flow toward the clean gas outlet.

[0017] Preferred embodiments of the invention are explained and described in more detail below with reference to the accompanying drawings. Fig. 1 shows a rotary separator according to the invention designed as a disc separator in a schematic side sectional view; Fig. 2 shows a further rotary separator according to the invention designed as a disc separator in a schematic side sectional view; Fig. 3 shows a rotary separator according to the invention designed as a fiber separator in a schematic side sectional view; Fig. 4 shows a further rotary separator according to the invention designed as a fiber separator in a schematic side sectional view; and Fig. 5 shows a further rotary separator according to the invention designed as a fiber separator in a schematic side sectional view.

[0018] The Fig. 1 shows a rotary separator 10 designed as a disc separator. The rotary separator 10 serves to separate liquid particles, namely oil particles, from a gas flow.

[0019] A separator housing 12 of the rotary separator 10 contains a rotating, drivable separator rotor 14. The separator rotor 14 comprises a plate stack 16 with a plurality of separator plates 18 arranged one above the other.

[0020] The separating rotor 14 is driven in rotation by a drive 20 designed as an electric motor.

[0021] The separator housing 12 has a raw gas inlet 22, through which a gas flow with a high particle load flows into the separator housing 12. The gas flow first reaches the raw gas side 24 of the rotary separator 10 before flowing through the separation rotor 14. The separation rotor 14 separates the raw gas side 24 of the rotary separator 10 from a clean gas side 26 of the rotary separator 10. After the particles have been separated by the separation rotor 14, the gas flow consequently reaches the clean gas side 26 of the rotary separator 10 and can be discharged from the separator housing 12 via the clean gas outlet 28.

[0022] The cross-section Q1, Q2 of the outer contour 30 of the separation rotor 14 corresponds to the outer contour 32 of the plate stack 16 and changes along the outflow section 48 in the axial direction A. The gas flow flows out of the separation rotor 14 on the clean gas side 26 of the rotary separator 10 along the outflow section 48. The cross-section Q1, Q2 of the outer contour 30 of the separation rotor 14 decreases along the outflow section 48 in the axial direction A toward the clean gas outlet 28. The outer contour 30 of the separation rotor 14 has a tapered and conical shape along the outflow section 48. The cone angle K of the separation rotor 14 in the outflow section 48 is between 2 degrees and 20 degrees.

[0023] The separator housing 12 comprises a peripheral wall 46 surrounding the separator rotor 14. The radial distance R1, R2 between the outer contour 30 of the separator rotor 14 and the peripheral wall 46 increases along the outflow section 48 in the axial direction A toward the clean gas outlet 28.

[0024] During operation of the rotary separator 10, the separating rotor 14 performs a rotary movement about the rotation axis Z.

[0025] The separation plates 18 of the plate pack 16 have different plate sizes, wherein the plate size decreases along the outflow section 48 in the axial direction A towards the clean gas outlet 28.

[0026] In the Fig. In the rotary separator 10 shown in Figure 2, the separation rotor 14 also has a plate stack 16 with several separation plates 18 arranged one above the other for separating the particles from the gas flow flowing through the separation rotor 14. However, the separation plates 18 have matching plate sizes, so that the outer contour 32 of the plate stack 16 has a cylindrical basic shape. The separation rotor 14 has a contour extension 34 extending at least partially radially on the outside of the plate stack 16, which defines the outer contour 30 of the separation rotor 14. In this case, the outer contour 36 of the contour extension 34 represents the outer contour 30 of the separation rotor 14. The contour extension 34 can be formed, for example, by webs or rings or a cage.

[0027] Due to the contour extension 34, the cross section Q1, Q2 of the outer contour 30 of the separation rotor 14 decreases along the outflow section 48 in the axial direction A towards the clean gas outlet 28.

[0028] The Fig. 3 to 5 show rotary separators 10 designed as fiber separators. The separation rotors 14 of the rotary separators 10 comprise a fiber medium 38 for separating the particles from the gas flow flowing through the separation rotor 14. The fiber medium 38 forms an annular separation structure 42.

[0029] In the Fig. In the rotary separator 10 shown in Figure 3, the separation structure 42 has a tapered and conical outer contour 44, so that the cross-section Q1, Q2 of the outer contour 30 of the separation rotor 14 decreases along the separation rotor 14 in the axial direction A toward the clean gas outlet 28. The annular separation structure 42 formed by the fiber medium 38 is supported by a support structure 40 of the separation rotor 14. The support structure 40 has a cylindrical outer contour. The tapered and conical shape of the separation rotor 14 is thus achieved by a material thickness of the separation structure 42 that decreases in the radial direction in the axial direction A toward the clean gas outlet 28.

[0030] In the Fig. In the rotary separator 10 shown in Figure 4, the annular separation structure 42 formed by the fiber medium 38 has a cylindrical outer contour and the annular separation structure 42 has a constant material thickness in the radial direction in the axial direction A.

[0031] The separation rotor 14 has a contour extension 34 extending radially outward of the fiber medium 38, which defines the outer contour 30 of the separation rotor 14. The outer contour 36 of the contour extension 34 thus represents the outer contour 30 of the separation rotor 14. The contour extension 34 can be formed by webs and / or rings and / or a cage.

[0032] In the Fig.In the rotary separator 10 shown in Figure 5, the support structure 40 for the annular separation structure 42 already has a basic shape that tapers conically in the axial direction A toward the clean gas outlet 28. The separation structure 42 formed by the fiber medium 38 has a constant material thickness in the radial direction in the axial direction A toward the clean gas outlet 28, so that the cross-section Q1, Q2 of the outer contour 30 of the separation rotor 14 decreases along the separation rotor in the axial direction A toward the clean gas outlet 28. Reference symbol 10 rotary separators 12 separator housings 14 Separator rotor 16 plate package 18 separator plates 20 drive 22 Raw gas inlet 24 Raw gas side 26 Clean gas side 28 Clean gas outlet 30 Outer contour of the separator rotor 32 Outer contour of the plate package 34 Contour extension 36 Outer contour of the contour extension 38 Fiber medium 40 support structure 42 Separation structure 44 Outer contour of the separation structure 46 peripheral wall 48 Outflow section A axial direction K Cone angle R1, R2 radial distances Q1, Q2 cross sections Z rotation axis QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2011 009 741 A1

[0002]

Claims

[1] Rotary separator (10) for separating liquid and / or solid particles from a gas flow, with - a separator housing (12); - a separator rotor (14) arranged in the separator housing (12) and rotatably driven, through which the gas flow for particle separation can flow and which has an outflow section (48) along which the gas flow flows out of the separator rotor (14) on a clean gas side (26) of the rotary separator (10); and - a clean gas outlet (28) for discharging the gas flow from the rotary separator (10) after particle separation has taken place; characterized by that the cross-section (Q1, Q2) of the outer contour (30) of the separator rotor (14) changes in the axial direction (A) at least along a partial region of the outflow section (48). [2] Rotary separator (10) according to claim 1, characterized bythat the cross-section (Q1, Q2) of the outer contour (30) of the separator rotor (14) decreases at least along the partial region of the outflow section (48) in the axial direction (A) towards the clean gas outlet (28). [3] Rotary separator (10) according to claim 1 or 2 characterized by that the outer contour (30) of the separator rotor (14) has a tapered and / or conical shape at least along a partial region of the outflow section (48). [4] Rotary separator (10) according to one of the preceding claims, characterized by a peripheral wall (46) which surrounds the separation rotor (14) at least in some areas, wherein the radial distance (R1, R2) between the outer contour (30) of the separation rotor (14) and the peripheral wall (46) increases at least along the partial area of the outflow section (48) in the axial direction (A) towards the clean gas outlet (28). [5] Rotary separator (10) according to one of the preceding claims, characterized bythat the rotary separator (10) is designed as a disc separator and the separating rotor (14) comprises a disc pack (16) with several separating discs (18) arranged one above the other for separating the particles from the gas flow flowing through the separating rotor (14). [6] Rotary separator (10) according to claim 5, characterized by that the separation plates (18) have different plate sizes, wherein the plate size decreases at least along the partial region of the outflow section (48) in the axial direction (A) towards the clean gas outlet (28). [7] Rotary separator (10) according to claim 5 or 6, characterized by that the separating rotor (14) has a contour extension (34) which extends at least partially radially outside the plate pack (16) and which defines at least partially the outer contour (30) of the separating rotor (14). [8] Rotary separator (10) according to one of the preceding claims, characterized bythat the rotary separator (10) is designed as a fiber separator and the separating rotor (14) comprises a fiber medium (38) for separating the particles from the gas flow flowing through the separating rotor (14). [9] Rotary separator (10) according to claim 8, characterized by that the fiber medium (38) or a separation structure (42) formed from the fiber medium (38) has a tapered and / or conical outer contour (44). [10] Rotary separator (10) according to claim 8 or 9, characterized by that the separation rotor (14) has a contour extension (34) which extends at least partially radially outside the fiber medium (38) and which defines at least partially the outer contour (30) of the separation rotor (14).

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