DE202017106027U1 - separating - Google Patents

Abstract

Device (1) for separating liquid and / or particulate impurities from at least one gas stream (P1), in which between at least a first, acting as the counter electrode electrode (17) and at least one second electrode (19), which acts as an emitting electrode and an electrode end directed in the direction of the first electrode (17), a flow path of the gas flow (P1) extends and between the first electrode (17) and the second electrode (19) a direct voltage exceeding the breakdown voltage to form a stable low-energy plasma (31) can be applied is
wherein the first electrode (17) is at least partially cylindrical in shape and / or has a substantially circular cross-section in at least one plane substantially perpendicular to the main extension direction of the flow path,
characterized in that
the device (1) further comprises at least one hollow-cylindrical wall (21) running substantially coaxially with the first electrode (17), wherein the second electrode (19) is at least partially enclosed on the wall (21).

Description

The present invention relates to a device for separating liquid and / or particulate impurities from at least one gas stream, in which between at least a first, acting as the counter electrode electrode and at least one second electrode, which acts as an emitting electrode and a directed in the direction of the first electrode End of the electrode has a flow path of the gas flow and between the first electrode and the second electrode a breakdown voltage exceeding DC voltage to form a stable low-energy plasma can be applied, wherein the first electrode is at least partially cylindrical and / or in at least one plane substantially perpendicular to Main extension direction of the flow path has a substantially circular cross-section.

Such generic plasma separators for separating impurities from a gas stream, in particular blow-by gases of a motor vehicle, are known from the prior art. For example, the DE 10 2011 053 578 A1 discloses a generic device.

1 shows a schematic cross-sectional view of the DE 10 2011 053 578 A1 known device.

So there it is suggested that the separation device 201 has a substantially cylindrical cross-sectional shape, in particular the counter electrode 209 or the wall 231 is formed in the form of a cylinder jacket-shaped element and the gas flow 207 between this and one in the from the counter electrode 209 limited interior arranged emission electrode 211 runs. In the process, the gas flow becomes 207 This cleans the contaminants to the outside in the direction of the counter electrode 209 through that between the emission electrodes 211 and the counter electrode 209 ignited plasma to be moved. This is intended to be a circular gas flow 207 unchanged by the device 201 can be passed, in particular without additional turbulence caused by a conversion of the shape of the gas stream 207 could be implied.

The in the DE 10 2011 053 578 A1 described device has basically proven. However, it has been found that the arrangement of the emission electrodes in the middle of the flow path of the gas stream can lead to improved flow properties of the gas stream. In addition, it was found in the described device that particles entrained in the gas stream can adversely adhere to the emission electrodes. In addition, a compact arrangement of the electronics in the described device is not readily possible.

It is therefore an object of the present invention to provide a separation device in which a particularly advantageous flow characteristic of the gas stream and less contamination of the emission electrodes can be achieved and at the same time a compact design is made possible with respect to the overall device.

The object is achieved in that the device further comprises at least one substantially coaxial with the first electrode extending hollow cylinder-shaped wall, wherein the second electrode is at least partially encompassed on the wall.

It is particularly preferred that the second electrode is arranged on the wall and / or at least partially within the wall thickness of the wall, is formed integrally with the wall, that the second electrode and / or the wall at least partially within that of the first electrode is enclosed volume arranged that the electrode end at least partially encapsulated with at least one plastic material, in particular at least one thermoplastic and / or at least one thermosetting plastic, at least one impact-resistant material and / or at least one polytetrafluoroethylene material, coated and / or covered and / or the wall is at least partially coated with at least one plastic material, in particular at least one thermoplastic and / or at least one thermoset, coated, coated and / or covered and / or consists thereof.

A device according to the invention can also be distinguished in that the device comprises at least one drive device, in particular comprising at least one, in particular at least one resistor element having, preferably for applying the second electrode to the DC voltage, wherein in particular the drive device at least partially in at least one is arranged enclosed by the wall volume, wherein preferably the board is at least partially disc-shaped and / or in particular rests at least partially flush with the inner surface of the wall.

In particular, a device according to the invention is characterized in that at least one high-voltage supply line, in particular at least partially disposed within the volume enclosed by the wall, is present, wherein preferably the High-voltage supply line at least partially coaxial with the first electrode and / or to the wall extends.

It can preferably be provided that at least one, a first plurality of second electrodes comprising electrode group is provided, wherein preferably, in particular in at least one plane substantially perpendicular to the main extension direction of the flow path, the first plurality of second electrode of the electrode group substantially on a Circle is arranged.

In the above implementation, it can be provided particularly advantageously that the drive device is conductively connected to the high-voltage supply line, that one or more second electrodes, in particular the first plurality of second electrodes of the electrode group, directly or, preferably via the drive device, indirectly with the High-voltage supply line is conductively connected and / or that the contacting of the second electrode through the wall is carried out.

In the four most preferred embodiments, it may further be provided that a second plurality of electrode groups is provided, that a third plurality of driving devices is provided, wherein preferably at least the second electrode, each of the second electrodes and / or each of the second plurality of electrode groups one which is assigned to drive devices and / or that, each of the second electrodes, in particular by means of an associated drive device of the third plurality of drive devices with a voltage having an individual voltage value for the respective second electrode is acted upon.

In this case, it is particularly possible for the wall to comprise a plurality of modules that can be connected to one another in the axial extension direction, with each module preferably comprising at least one section of the wall, at least one of the second plurality of electrode groups and / or at least one of the third plurality of control devices, wherein in particular Connecting region between two successive modules at least partially, in particular circumferentially band-shaped, with at least one plastic material, in particular at least one thermoplastic, at least one thermosetting plastic, at least one impact-resistant material and / or a polytetrafluoroethylene material encapsulated, coated and / or covered and / or this, at least in certain areas.

Alternatively or additionally, it can also be provided that the device further comprises at least one high-voltage module, which is preferably designed to provide a high voltage, in particular DC high voltage, and / or is conductively connected to the high voltage supply line.

In the three last embodiments, it may be preferable that the first plurality is numerically identical to the second plurality, that the first plurality is numerically identical to the third plurality, and / or that the second plurality is numerically identical to the third plurality.

The invention is thus based on the surprising finding that, by providing a hollow cylindrical wall which runs coaxially with the first electrode, on the one hand a defined flow path for the gas flow can be provided. On the other hand, the wall then allows the second electrodes to be arranged thereon and / or at least partially therein, so that the second electrodes do not substantially protrude into the flow path, in particular not centrally in the flow path but at an edge region, whereby the contact with the gas flow can be reduced without affecting the deposition of impurities, since the impurities can continue to be deflected in the best direction towards the second electrode due to the effect of the plasma. If the second electrodes are preferably formed integrally with the wall, even a particularly compact and, above all, low-maintenance realization of the separating device can be achieved.

In addition, since the electrode end of each second electrode is encapsulated, coated and / or covered at least in some areas with a plastic material, a particularly advantageous additional shielding of the electrodes from the gas flow can be achieved so that deposits of impurities entrained in the gas flow are deposited on the second electrodes can be counteracted effectively increased again. For this purpose, in particular materials with high dielectric strength, such as thermoplastic and / or thermosetting materials and / or polytetrafluoroethylene materials (Teflon) offer.

In addition, the hollow cylindrical wall makes it possible to arrange, in the volume enclosed by it, drive devices which can act on each second electrode separately or together with a DC voltage. For this purpose, such a drive device may comprise a circuit board having resistance elements. By the resistance elements, for example, setting the DC voltage to a desired Voltage value are performed, whereby for each individual second electrode, a separate voltage value can be defined. The contacting of the second electrode can be carried out through the wall. In any case, the necessary electronics of the drive device can be accommodated compactly in the hollow cylindrical wall, in particular, no unnecessary electrical connections must be made outside the separation device. Also, the wall may in particular, at least partially, comprise a material with high dielectric strength, such as thermoplastic and / or thermosetting materials.

The compact construction continues in that, within the same volume of the wall, the high-voltage supply line can also run, via which the drive device (s) can be supplied with high voltage by providing a conductive connection between high-voltage supply line and drive device (FIG. en) is produced.

By combining a first plurality of second electrodes into one electrode group, in the case of a second plurality of electrode groups, all the second electrodes can be driven, for example, in an electrode group-dependent manner, that is, supplied with voltage. In particular, each electrode group may be assigned its own one of a third plurality of drive devices.

When the wall is of modular construction, each module may comprise a portion of the wall and the second electrodes of an electrode group disposed on the portion of the wall, including the driving means which energizes these electrodes. As a result, depending on the desired length of the separating device, in particular of the plasma separator, and / or depending on the desired or required cleaning power, correspondingly many modules can be connected to one another in the axial extension direction.

When the transitional areas between two successive modules are encapsulated, coated and / or covered with a plastic material, adjacent modules are joined in a particularly advantageous manner and the transition areas are sealed, in particular preventing the gas flow from penetrating into the volume enclosed by the wall. Furthermore, the entire assembly is stabilized by the plastic material as a whole.

If a separate high-voltage module is provided, the high voltage provided, in particular high-voltage DC voltage, value-wise easily determined by selecting a corresponding high-voltage module and also easily changed by replacing the high-voltage module.

As a result, as well as by the possibility of the described modular construction, depending on the application, a separation device, in particular a plasma separator, can be assembled according to the modular principle, without the need for many different components. This makes the separator not only flexible in use, especially for different series, but also inexpensive to manufacture.

Further features and advantages of the invention will become apparent from the following description, are explained in the preferred embodiments of the invention with reference to schematic drawings.

• 1 eine schematische Querschnittansicht einer Abscheidevorrichtung gemäß dem Stand der Technik;
• 2 eine perspektivische Außenansicht einer insgesamt zylinderförmig ausgestalteten erfindungsgemäßen Abscheidevorrichtung;
• 3 eine erste perspektivische Schnittansicht der Abscheidevorrichtung aus 2 entlang der vertikalen Schnittebene A-A;
• 4 die Ansicht aus 3 mit beispielhaften Bemaßungen;
• 5 eine zweite perspektivische Schnittansicht der Abscheidevorrichtung aus 2 entlang der horizontalen Schnittebene B-B;
• 6 die Darstellung der 5 in einer perspektivisch geneigten Ansicht;
• 7 einen Ausschnitt aus 6;
• 8 einen Ausschnitt aus 7; und
• 9 das Hochspannungs-Modul.

Showing:

• 1 a schematic cross-sectional view of a separation device according to the prior art;
• 2 an external perspective view of a total of cylindrical designed inventive separation device;
• 3 a first perspective sectional view of the separator from 2 along the vertical section plane AA;
• 4 the view 3 with exemplary dimensions;
• 5 a second perspective sectional view of the separator from 2 along the horizontal sectional plane BB;
• 6 the representation of 5 in a perspective inclined view;
• 7 a section from 6 ;
• 8th a section from 7 ; and
• 9 the high-voltage module.

2 shows an external perspective view of a total of cylindrical designed inventive separation device 1 which has a gas inlet 3 for a gas stream P1 , in particular a blowby gas flow of a crankcase, a gas outlet 5 for through the separator 1 purified gas stream P2 and a first outlet 7 and a second outlet 9 for within the separator 1 from the gas stream P1 deposited impurities, especially oil.

In 3 is a first perspective sectional view of the separator 1 out 2 shown along the vertical section plane AA. It can be seen how the separation device 1 a coarse separator 11 , in particular in the form of a cyclone, and a plasma separator 13 includes. The gas flow P1 passing through the gas inlet 3 in the separator 1 enters, passes through the entrance area 15 first in the coarse separator 11 , Due to the cyclone effect, the deflections and / or the interactions with the housing of the separator 1 , in particular the coarse separator 11 that the gas stream P1 learns there is coarse oil and other coarse contaminants or impurities and / or particles from the gas stream P1 deposited. The oil separated in this way, together with other contaminants, can flow via the first outlet 7 from the separator 1 be dissipated.

Along the main flow direction R the gas flow occurs P1 from the coarse separator 11 into the plasma separator 13 above. In the plasma separator 13 spreads the gas flow P1 along the main flow direction R between a substantially cylindrically shaped first acting as the counter electrode electrode 17 and a first plurality of second electrodes 19 , which act as emission electrodes, and one each in the direction of the first electrode 17 directed end of the electrode, from.

The first plurality of second electrodes is on a wall 21 of the plasma separator 13 arranged. The wall 21 is hollow cylindrical and extends coaxially with the first electrode 17 , This is a defined flow path for the gas flow P1 specified.

Between each of the first and a second electrode 17 . 19 A DC voltage exceeding the breakdown voltage is applied to form a stable low energy plasma, such that in the volume region between the first electrode 17 and the second electrodes 19 forms a stable low energy plasma.

Due to the low energy plasma that passed through the coarse separator, still in the gas stream P1 located impurities in the 3 outwards towards the first electrode 17 accelerated and there and / or on the housing wall of the separator 1 deposited. The thus deposited impurities can via the second outlet 9 from the separator 1 be dissipated.

The previously contaminated gas stream P1 happens the volume range between the first electrode 17 and the second electrodes 19 with the low energy plasma formed therein along the main flow direction R and enters the output region 23 , from where the now purified gas stream P2 through the gas outlet 5 from the separator 1 exit.

In 4 is the view of the separator 1 out 3 shown with exemplary dimensions. Thus, the diameter D of the separator 1 For example, be 73.6 mm and the height H of the separator 1 for example, 145 mm. However, these dimensions are only exemplary and should clearly show how compact the separation device 1 can be realized.

In 5 is a second perspective sectional view of the separator 1 out 2 shown along the horizontal sectional plane BB. In contrast to 3 is in 5 another high-voltage supply line 25 which is conductive with a third plurality of drive devices 27 connected is. The driving devices 27 are also conductive with their respective associated second electrodes 19 connected and apply these to the DC voltage. The second electrodes 19 are in a second plurality of electrode groups 29 split, with each electrode group 29 in the 5 at a height of the wall 21 and circumferentially arranged second electrodes 19 includes.

In 6 is the representation of 5 reproduced in a perspective inclined view. This results in the individual components of the separation device 1 again very clearly visible. In addition, this is between the first electrode 17 and the second electrodes 19 formed plasma 31 shown. Through a section X is in 6 an inner part of the plasma separator highlighted.

In 7 is the in 6 shown with X cutout isolated.

This section X in 6 represents in particular the hollow cylinder-shaped wall 21 of the plasma separator 13 where the wall is 21 in 7 clearly shows that it is composed of three identical modules, which are connected to each other in the axial direction of extent. The connection area 33 between two successive modules is overmolded with a plastic material, whereby the adjacent modules are joined as well as the connection area 33 sealed, which in particular a penetration of the gas stream P1 in the wall 21 enclosed volume is prevented, and the arrangement is stabilized as a whole. In 7 is the middle of the three modules through a section Y highlighted.

In 8th is the in 7 Shown with Y designated section isolated.

This section Y in 7 puts the module 35 that is a section 37 the wall and one of the second plurality of electrode groups. The corresponding second electrodes 19 the electrode group 29 are within the wall thickness of the section 37 of the module 35 provided wall or arranged on the wall and in particular integrally formed therewith.

The of the electrode group 29 included second electrodes 19 are arranged in a plane substantially perpendicular to the main extension direction of the flow path substantially on a circle. The electrode ends of the first plurality of second electrodes 19 the electrode group 29 are, in particular completely, overmoulded with a plastic material.

In particular, at voltages of, for example, less than 16 kV can between a second electrode 19 and the counter electrode 17 a low energy plasma are generated.

The module 35 further comprises one of the third plurality of drive devices. The corresponding control device 27 in turn, includes a circuit board 39 , which has several resistive elements 41 having. Here is the board 39 disc-shaped and lies flush with the inner surface of the wall of the section 37 at. Through a centric recess 43 the board 39 the high voltage supply line (not shown in FIG 8th ), with which the drive device 27 , especially the board 39 , is connected conductively. As a result, the driving device 27 supplied with a high voltage.

On the other hand, the first plurality of second electrodes 19 the electrode group 29 conductive with the drive device 27 connected. Thus, the second electrodes are 19 the electrode group 29 via the drive device 27 indirectly conductively connected to the high voltage supply line. In other words, the drive device 27 acts on the first plurality of second electrodes 19 the electrode group 29 with the DC voltage, whereby ultimately a low energy plasma can be formed. The voltage can be per second electrode 19 and / or per electrode group 29 about the resistance elements 41 be chosen individually.

In the 6 shown high voltage supply line 25 is with a high voltage module 45 conductively connected. The high-voltage module 45 provides the high voltage available and is designed in particular as an attachment so that it easily on or in the separator 1 , insbesosndere the plasma separator 13 , connected and / or can be integrated and thus a compact design of the separator 1 allows. Preferably, the high voltage module 45 at least at one end of the plasma separator 13 arranged.

9 shows the high voltage module 45 shown isolated. The high-voltage module 45 includes at least one connection 47 for connecting the high voltage module 45 to an external power supply and a plurality of electronic components 49 which in particular enable a transformation between the voltage value of the external voltage supply and that of the high voltage.

Consequently, the embodiment shown makes it possible to realize a very compact, in particular cylindrical, construction of the plasma separator and the entire separating device. In addition, as shown, a problem-free integration of a coarse separation take place in the separation device, thus a coordinated interaction between the plasma and coarse separator upstream can be achieved, the gas flow can pass seamlessly from the coarse separator in the plasma separator.

The features disclosed in the specification, in the claims and in the drawings may, both individually and in any combination, be essential to the invention in its various embodiments.

LIST OF REFERENCE NUMBERS

1

separating

3

Gas inlet

5

Gas outlet

7.9

outlet

11, 13

separators

15

Input area

17, 19

electrode

21

wall

23

Out section

25

High-voltage power line

27

driving

29

Elektodengruppe

31

plasma

33

connecting area

35

module

37

section

39

circuit board

41

resistive element

43

recess

45

module

47

connection

49

components

201

separating

207

gas flow

209

counter electrode

211

emitting electrode

231

wall

P1, P2

gas flow

A-A, B-B

cutting plane

D

diameter

H

height

R

direction

X, Y

neckline

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The 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

• DE 102011053578 A1 [0002, 0003, 0005]

Claims (10)

Device (1) for separating liquid and / or particulate impurities from at least one gas stream (P1), in which between at least a first, acting as the counter electrode electrode (17) and at least one second electrode (19), which acts as an emitting electrode and an electrode end directed in the direction of the first electrode (17), a flow path of the gas flow (P1) extends and between the first electrode (17) and the second electrode (19) a direct voltage exceeding the breakdown voltage to form a stable low-energy plasma (31) can be applied is, wherein the first electrode (17) is at least partially cylindrical and / or in at least one plane substantially perpendicular to the main extension direction of the flow path has a substantially circular cross-section, characterized in that the device (1) further at least one substantially coaxial to the first electrode (17) v comprises running hollow cylindrical wall (21), wherein the second electrode (19) at least partially on the wall (21) is included. Device after Claim 1 , characterized in that the second electrode (19) on the wall (21) and / or at least partially within the wall thickness of the wall (21) is arranged, is formed integrally with the wall (21) that the second electrode (19) and / or the wall (21) is arranged at least in regions within the volume enclosed by the first electrode (17), that the electrode end at least partially with at least one plastic material, in particular at least one thermoplastic, at least one thermosetting plastic, at least one dielectric material and / or at least a polytetrafluoroethylene material encapsulated, coated and / or covered and / or that the wall (21) at least partially with at least one plastic material, in particular at least one thermoplastic, at least one thermosetting plastic, at least one dielectric material and / or at least one polytetrafluoroethylene Material encapsulated, coated and / or covered, this includes and / or consists of. Device according to one of the preceding claims, characterized in that the device (1) at least one drive device (27), in particular comprising at least one, in particular at least one resistance element (41) having, board (39), preferably for applying the second electrode (19 ), wherein in particular the drive device (19) at least partially in at least one of the wall (21) enclosed volume is arranged, wherein preferably the board (39) is at least partially disc-shaped and / or in particular at least partially flush the inner surface of the wall (21) rests. Device according to one of the preceding claims, characterized in that at least one high-voltage supply line (25), in particular at least partially disposed within in the volume enclosed by the wall (21) is present, wherein preferably the high-voltage supply line (25) at least partially coaxial with the first electrode (17) and / or to the wall (21). Device according to one of the preceding claims, characterized in that at least one, a first plurality of second electrodes (19) comprising electrode group (29) is provided, wherein preferably, in particular in at least one plane substantially perpendicular to the main extension direction of the flow path, the first plurality at second electrodes (21) of the electrode group (29) is arranged substantially on a circle. Device according to one of the preceding claims, characterized in that the drive device (19) to the high-voltage supply line (25) is conductively connected, that one or more second electrodes (19), in particular the first plurality of second electrodes (19) of the electrode group (29), directly or, preferably via the drive device (27), indirectly conductively connected to the high-voltage supply line (25) and / or that the contacting of the second electrode (19) through the wall (21) therethrough. Device according to one of the preceding claims, characterized in that a second plurality of electrode groups (29) is provided, that a third plurality of driving devices (27) is provided, wherein preferably the second electrode (19), each of the second electrodes (19) and / or each of the second plurality of electrode groups (29) is assigned at least one of the drive devices (27) and / or that, each of the second electrodes (19), in particular by means of an associated drive device (27) of the third plurality of drive devices having a voltage for the respective second electrode (19) individual voltage value can be acted upon. Device according to one of the preceding claims, characterized in that the wall (21) a plurality of each other in axial The extension direction comprises connectable modules (45), wherein preferably each module (45) comprises at least a portion of the wall (21), at least one of the second plurality of electrode groups (29) and / or at least one of the third plurality of drive devices (27) in particular, the connection region between two successive modules (45) at least partially, in particular circumferentially band-shaped, coated with at least one plastic material, in particular at least one thermoplastic, at least one thermoset, at least one impact-resistant material and / or at least one polytetrafluoroethylene material, coated and / or covered is and / or includes this, at least in certain areas. Device according to one of the preceding claims, characterized in that the device (1) further comprises at least one high-voltage module, which is preferably designed to provide a high voltage, in particular DC high voltage, and / or to the high voltage supply line (25) is conductively connected. Device according to one of the preceding Claims 7 to 9 characterized in that the first plurality is numerically identical to the second plurality, that the first plurality is numerically identical to the third plurality, and / or that the second plurality is numerically identical to the third plurality.

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