CN1278745A - Separation of solid particulate materials from fluid streams - Google Patents

Abstract

A method of separating particulate material from a fluid stream comprises rotating in the fluid stream (10) a perforated barrier (1) which permits the fluid to pass through it, the axis of rotation of the barrier projecting into the fluid stream, and the front surface of the perforated barrier being substantially normal to the streamlines in a major part of the incoming flow at the points where the flow meets the barrier, particles (2) colliding with the barrier being in consequence imparted with kinetic energy in a tangential direction so that they travel towards the periphery of the perforated barrier entrained in a diverted portion of the fluid stream.

Description

Separation of solid particulate material from fluid streams

The present invention relates to methods and apparatus for separating solid particulate material from fluid streams.

The word fluid in the present document includes gaseous phase fluids and liquid phase fluids.

The ability of a fluid stream to carry particulate material with it may be advantageous in many situations and may be used, for example, to transport material from one location to another, which may be useful items or waste , at this other location the fluid must be effectively separated from the particulate material. In other cases, the particulate material may be an undesirable constituent of the fluid flow and should therefore be introduced when the fluid is introduced, for example, into an engine or machine or into an industrial process or into an environment, whether that environment be a large environment, or a closed environment. environment, such as an office environment, remove these particulate materials.

An important application of the separation method is the use in the field of removal of particulate waste by, for example, households, gardens, offices, workshops and factories including so-called vacuum cleaning devices, either as dedicated cleaning equipment or as other equipment With the attachment, operation of the device forms particulate waste. Other important applications are those in systems producing particulate-laden exhaust gases or liquids which must be treated in order to meet emission standards, such as diesel and other internal and external combustion engines, various industrial processes and waste treatment operations.

Separation applications involving the use of liquids as fluids include, for example, sand dredging and liquid waste handling.

Thus, as will be seen below, the range of potential separation applications to which the present invention can be applied is very wide and includes many applications not specifically mentioned above, however, the present invention is equally applicable to these applications.

There is growing concern about filtration standards and there have been new developments in vacuum technology that provide higher levels of filtration without the need for finer filters, however, requiring the use of very efficient cyclones . These cyclones by themselves cannot guarantee the size of the particles removed from the fluid stream. This is only possible by passing the fluid through a porous medium with pores of predetermined size to remove larger particles.

However, such porous media become clogged very quickly, and thus such media require a large area in order to have an acceptable use time before they have to be cleaned. Home-made vacuum cleaners are one example; some electric trains have cooling duct inlets clogged with fine snow is another; air conditioner filters are easy examples.

Therefore, existing problems relate to the efficiency of conventional filtration systems, on the one hand with respect to the life of the filter, and on the other hand with the efficiency of the filtration process itself. In particular, there is a need for a process which more effectively removes solid particulate material from near the front surface of the filter, which maintains the filter in a clean condition, which does not frequently stop the separation process, is more compact, and is compatible with Devices that have previously attempted to solve these problems use filters with a smaller surface area and are capable of directing the separated particles in a controlled flow to a location where they can be further processed.

Proposals using rotating filters have been proposed previously. However, these prior devices have not been effective in practice, either due to their construction, the number or area of filters that may be required, or due to the way they operate, they are not effective for separating solid particulate material from a fluid stream. Efficient methods are still in demand, which avoid the problems mentioned above.

According to the present invention, there is provided a method of separating particulate material from a fluid stream, the method comprising rotating in the fluid stream a porous baffle which allows the fluid to pass through it, the baffle having its axis of rotation extending into the fluid In a flow where the front of the porous baffle is substantially perpendicular to the streamline of the main part of the incoming flow at the point where the flow meets the baffle, the particles collide with the baffle with the result that kinetic energy is imparted to the particles in a tangential direction so that they are The entrainment moves towards the perimeter of the porous baffle in a diverted portion of the fluid flow. Preferably, the diverted portion of the fluid flow is directed to a space where it is separated by the vicinity of the rotating front surface of the perforated baffle, whereby the diverted portion of the flow is separated The particles do not meet the fluid flow to the rotating baffle.

It is a further desirable feature of the present invention to return around the baffle a portion of the fluid stream that has passed through the perforated baffle to join the diverted portion of the fluid stream that contains entrained particulate material to be separated.

The present invention also provides an apparatus for separating particulate material from a fluid stream, the apparatus comprising:

a conduit for conveying a fluid stream containing entrained particulate material;

a porous baffle mounted for rotation in the conduit about an axis extending into the fluid flow, said porous baffle permitting fluid flow therethrough, the front of the baffle being disposed in the conduit so that it is substantially perpendicular to the streamline of the main part of the incoming flow at the point where the flow meets the baffle; and

A device used to rotate a perforated baffle.

Preferably, the device also includes means for directing a diverted portion of the fluid flow which contains particles which collide with the front surface of the baffle such that rotation of the baffle imparts a tangential direction to the particles. Kinetic energy, so that the particles are entrained in the diverted portion of the fluid flow at the periphery of the surface; the guiding device is arranged to guide the diverted portion of the fluid flow to a space where It is separated by the vicinity of the rotating front surface of the perforated baffle so that the separated particles in the diverted portion of the flow do not encounter the fluid flow towards the rotating baffle.

A major part of the incoming flow means more than 50% of the incoming flow volume.

An essential feature of the present invention is that the separation of the particulate material is not only due to the limited size of the openings of the baffle, but also due to the collision of the particles with the rotating baffle when the fluid flow meets the front of the rotating baffle, resulting in The kinetic energy is imparted to the particle in the tangential direction. That is, the present invention combines traditional filtration techniques utilizing baffles containing holes through which only certain size particles can pass, with another technique in which rotation of the baffles Kinetic energy is imparted to the particles in the fluid stream, thereby imparting sufficient kinetic energy to the particles and a portion of the fluid (perhaps, 5% to 10%) in a direction tangential to the rotation of the baffle, thereby moving them outward from the axis of rotation of the baffle drive, toward the perimeter of the porous portion of the baffle, separating them from the main fluid flow (perhaps, 90% to 95% of the original flow) that passes through the baffle along with the rest of the very small particles, which Very small particles are able to pass through the holes in the baffle. Thus, the present invention combines conventional baffle filtration with the use of applied tangential forces to achieve relative separation of particulate material from fluid in a controlled manner.

It will be appreciated that in order for a fluid flow containing particulate matter to meet the rotating baffle perpendicularly, the baffle is typically rotated in a plane perpendicular to the fluid flow, however, this is not strictly necessary.

The particulate material to be separated by the method and apparatus of the present invention is generally a solid particulate material. However, it will be appreciated that in some cases, the particles may, for example, have a relatively high liquid content and can be described as semi-solid, or that certain other cases may not be strictly considered solid, but, nonetheless , they are still particulate materials that can be separated by the method and apparatus of the present invention.

Porous baffles can be made like conventional filters, for example from porous metal, sintered metal, porous ceramic material, woven or nonwoven fibers, fiber bundles, tube bundles or any other conventional filter material. However, it is not essential that the porous baffle have such a structure, so long as it allows fluid flow therethrough. Thus, for example, it may be in the form of a multi-spoked wheel or a multi-bladed wheel, and the basic requirement for a rotating perforated baffle is that it has a surface area large enough to face the fluid flow so as to strike a substantial portion of the material conveyed in the flow. solid particles, thereby subjecting them to tangential forces, radially away from the porous front surface of the baffle and thereby physically separating them from the primary fluid flow through the baffle body. It will be seen that this mechanism keeps the passage through the baffle unobstructed. The size of the channels or pores through the baffle is of course related to the size of the material of the particles which can be separated. However, it has been found that the pore size can be, for example, 100 microns, and surprisingly about 98% of the 5 micron particles can be separated by the method of the present invention, a ratio of pore size to particle size of 20 1. Thus, the present invention not only substantially removes particles much smaller than the fineness of the filter, but the present invention enables the use of coarser filters, which are also cleaned and effectively cleaned by using the method of the present invention. state is maintained for a much longer period of time. Another advantage of the present invention is that, due to the structure and method used in the device, the area of filter material required is much less than in prior devices. The present invention is particularly useful for removing particles in the size range including about 2.5 microns, which in the past have been a problem in causing clogging of conventional filters.

It is a feature of the present invention that the particulate material in the stream meeting the rotating baffle on its axis of rotation will not be driven outwards, at least not immediately, because of the tangent at the point of encounter. The kinetic energy and centrifugal force are low, which makes the accumulation into a small hyperbolic pile. This can be avoided by clogging the surface of the porous material, preferably with paint or varnish, in the axial region of the rotating baffle body.

The actual construction of the porous baffle may be such that it comprises porous material only in its central portion, while the periphery may be of any suitable material and may serve as a container for the porous material.

The preferred shape of the baffle is a disc, which may have flat or curved surfaces and may be convex, tapered, oval, domed or bullet-shaped, or any other suitable shape. The shape of the surface upon which the separated particulate material can exit the baffle preferably directs the separated particulate material so that it does not encounter or interfere with the incoming flow, in order to prevent them from passing through the baffle.

Although the rotating perforated baffle as described above need not be in the form of a conventional filter, it will, for convenience, be referred to as a filter hereinafter in this document.

Preferably, the means for rotating the filter also includes means for moving the fluid stream when the fluid containing the particulate material has not already moved as a stream. In this case, it is convenient to make the filter integral with or connected to, for example, the turbine of a turbine or other device which causes the flow of the fluid in the fluid pipe, the location of such a device can be adjusted for the fluid flow. In front of the filter or behind the filter. The power means used to generate the rotation may conveniently be an electric motor, but in applications of the invention, for example for motors, chemical plants or other process applications, other power sources may be used which may be more convenient or economical to use.

The manner in which the diverted portion of the fluid flow containing the particulate material to be separated is directed and processed immediately after it exits the rotating filter sideways will depend on the particular application of the invention. In many cases, however, it will be desirable to provide a surrounding barrier around the perimeter of the filter, which may be fixed or rotate with the filter and extend in front of the filter such that a gap is formed and the The deflected part of the fluid flow is guided into this gap together with the particles to be separated, and the deflected flow can be passed from this gap to, for example, a chamber, where, for example, by gravity or magnetic force or centrifugal force The force can cause most of the particles to separate from the fluid, which can then rejoin, for example, the main fluid stream, either before the main fluid stream has entered the separation step, or after this step, depending on the particular application. Alternatively, the diverted portion of the flow may be introduced into a chemical or physical process for transporting the particles together with the particles to be separated still entrained therein.

Alternatively, two or more separation steps of the present invention may be arranged in cascade in order to provide a finer separation.

As previously stated, an important and very useful application of the invention is in the field of removal of particulate waste which is currently treated with various forms of vacuum technology. It will be seen that the present invention provides a way to improve upon these techniques by replacing the traditional filters used in these devices with the rotating perforated baffles of the present invention, which in many cases are comparable to existing There are relatively few device-related design changes, but significant benefits can be gained. These existing devices already include suitable drive power, usually in the form of an electric motor, connected to some form of turbine to cause fluid flow, while there is already collection means for the separated particulate waste. Thus, the rotating fluid permeable porous baffle of the present invention need only be connected to the impeller of the device in the conduit of the fluid flow and eliminate the existing stationary filter in order to use the present invention.

Thus, for example, conventional devices of the battery-powered hand-held vacuum cleaner type, such as the "Dustbuster" (trade name) type of device, which itself is a very efficient device of that type, may be suitable for use as mentioned above. use the invention as intended. A specific application of this device will be described later.

Other types of vacuum cleaners designed for larger volumes of particulate waste include so-called bucket or cylinder vacuum cleaners, which typically feature a column or other container that includes an air inlet, hose attachment to the collector To this inlet, an electrically powered turbine preceded by one or more conventional filters, at least one of which is often in the form of a porous bag, is arranged to trap particulate waste. It will be seen that such a general arrangement can be easily adapted to employ the arrangement of the present invention in which a turbine is connected to the fluid-permeable baffle of the present invention in order to cause it to rotate and thus achieve particulate waste These particulate wastes can, for example, be deflected backwards together with the deflected part of the air flow within the body of the container and collected at the bottom of the container.

A variation of the bucket-type vacuum cleaner is the carpet cleaning unit. In such a cleaning device, it is arranged such that the carpet cleaning solution is spread over the carpet from near the end of the collection hose. In this case, the hose leads the liquid-containing solid particulate waste back into the container in the gas stream. In this case, as in other cases where the gas phase fluid may contain liquid droplets, a conventional "fling" device may also be fitted in front of the rotating filter. The flinger is a solid disc that, as its name suggests, rotates and flings the liquid droplets present in the air stream to the side, thus reducing or eliminating the amount of liquid that reaches the filter itself, when combined with These liquids can cause clogging problems when granular materials are mixed.

It will be appreciated that there are other devices where it may be desirable to introduce liquid into the main flow of the gas phase fluid, in which case it may be necessary or desirable to include a throwing device prior to the rotating filter, or it may not be desirable Including such a throwing device.

An additional or additional feature that may be included in such a vacuum cleaner device is a pre-shredder, in other words, a rotating vane arrangement fitted in front of the rotating filter body, which allows the particulate waste to reach the The filter surface provides some reduction in the size of the particulate waste and thus makes the particulate material easier to handle.

Another type of vacuum is the garden vacuum, which is used to remove leaves or other garden debris. Such a vacuum cleaner may use the device of the invention in a manner similar to that described above, but optionally with a useful modification in which the main flow of air generated by the turbine may be ducted to a The inlet of the hose to move the debris and then suck the debris into the collection hose. If desired, a liquid such as water or other treatment agent, or liquid or particulate matter may be introduced into the high pressure air stream. It will be appreciated that such devices can also be used in carpet cleaning apparatus whereby water or a carpet cleaning solution is introduced into a high pressure air stream to drive the cleaning agent deep into the carpet.

As mentioned above, in addition to dedicated cleaning units, effective cleaning units are also required as an adjunct to other types of equipment that generate particles as a by-product of its operation, such as mechanical sandblasting machines, polishing machines and woodworking machinery . Accordingly, it is to be understood that the present invention extends to any of these types of equipment when these types of equipment include the apparatus according to the present invention as means for removing particulate matter.

As previously mentioned, the apparatus of the present invention may be used to remove particulates from the exhaust gases of combustion engines and other processes. As will be seen from the foregoing, this can be accomplished by taking the diverted portion of the fluid flow, in this case the exhaust gas containing a significant amount of carbon-based particles, into a separate vessel, In that separate container they can be removed by conventional means, such as gravity or centrifugal force. However, it is also possible to add this diverted flow containing carbon particles to the intake air of the engine so that the particles are combusted or otherwise treated by chemical or physical reactions.

Furthermore, it will be appreciated that the device of the present invention may be used in any chemical or industrial process or plant where it is desired to separate particulate material from the fluid, and that the aforementioned techniques may be used, such as by diverting Separating particles, recirculating diverted streams into the main flow, and removing hazardous particles from exhaust and drainage, including air and liquid handling equipment, and reacting them to render them harmless.

The invention will now be described by way of example with reference to the accompanying drawings, in which:

Figure 1 is a schematic view of the operation of the device of the invention represented in section;

Figure 2 is a schematic view in section of the device shown in Figure 1, wherein the filter includes an integral axial flow turbine for generating fluid flow;

Figure 3 is a schematic view of the device shown in Figure 1 in cross-section, wherein the filter includes a centrifugal turbine for generating fluid flow;

Figure 4 is a schematic view in section of an apparatus similar to that shown in Figure 3, showing in more detail the recovery of particulate matter and the recirculation of diverted fluid, including the flow of fluid, see Figure 5 for specific parts of the system ;

Fig. 5 is the Mollier figure of device shown in Fig. 4;

Figure 6 is a schematic partial cross-sectional view of a handheld vacuum cleaner incorporating the device of the present invention.

Referring to Figure 1, a particle-laden fluid 12 approaches a rotating filter disc 1, where tangential forces throw particles 2 that cannot pass with the fluid stream 3 out of the rotating disc 1, as indicated by the arrows indicating the direction as shown. Fluid flow across the rotating filter is created by applying a pressure differential (p ¹ -p ⁰ ), which can be provided by any suitable means.

The suitable means for generating a pressure differential across the rotating filter 1 is itself rotatable, providing a suitable and integral drive for the disc 1. Figures 2 and 3 show two suitable turbine arrangements, Figure 2 being an axial machine and Figure 3 being a radial or centrifugal machine. In both cases the turbine directly rotates the discs and the discs form an integral part of the rotor 4 for the axial machine and the rotor 5 for the radial or centrifuge respectively. The rotating filter disc 1 operates as previously described, the fluid 3 passing through the filter 1 and the blade action of the rotors 4 and 5 respectively clearing particulate matter; the filter disc also remains clean.

In those cases where a particle-free fluid is the desired product, the particles 2 can be made to impinge on the rotating filter disc 1, directing them to a location where they will not be entrained by the incoming flow , or interfere with the incoming flow, but cannot be recycled. In other cases, such as in the case of vacuum cleaners, the particles 2 that hit the rotating filter disc 1 must be recovered. Referring to FIG. 4 , dirty fluid 12 containing particles 2 enters pipe 14 at point A due to the action of centrifuge turbine 5 . This fluid is directed via conduit 14 onto the surface of rotating filter disc 1 . The centrifugal action in the rotor 5 directs the clean fluid 3 through the rotating filter 1 , discharging at point E into a suitable conduit 11 . As described above, the particles 2 impinging on the rotating filter 1 are thrown off and carried by the deflected fluid flow 6 to the site F in a suitable helical duct formed by the baffle 7, blocking The action of the rotating disc 1 produces a diverted fluid flow 6 . The fluid and particles flow from F to G in a suitable container where, due to the lower flow velocity, a portion of the particles 13 settles, for example under the effect of gravity. Partially cleaned fluid 15 is reintroduced at H into the main flow 12 via conduit 9 .

The flow conditions of incoming streams 12 , 10 , cleaning streams 3 , 11 and particle laden stream 6 and recirculated stream 15 are shown in the Mollier diagram of FIG. 5 .

The exact configuration of the rotating disk depends on the detailed flow conditions and geometry of the dirty main 2 and clean 3 streams, which themselves depend on the specific application.

Figure 6 shows partly schematically a hand vacuum cleaner comprising a device according to the invention. In fact, this vacuum cleaner is a modification of the well-known "Dustbuster" (trade name) type hand vacuum cleaner which has been modified in the manner described above.

The cleaner comprises a main part 21 and a detachable nozzle part 22, externally it comprises two shells of molded material. The main part 21 houses an electric motor 23, which has switching means (not shown). A rechargeable battery 24 powers an electric motor which drives a turbine 25 integral with a funnel-shaped duct 26 fitted with a dome-shaped perforated screen 27 in front of the duct. The casing 21 has exhaust openings 28 on each side for the primary air flow generated by the turbine. However, between the funnel-shaped duct 26 and the circumferential neck of the turbine 25 and the wall of the main housing 21 there is additionally a circumferential gap 29 , which faces the nozzle part 22 . The function of this gap is to send a portion of the airflow that has passed through the perforated shield and turbine back around the shield to join the diverted portion of the airflow that contains entrained particulate material to be separated.

The removable nozzle section 22 has a nozzle 31 which leads to an internal duct 32 for delivering air and particulate material entrained therein. The presence of this internal conduit 32 provides an annular space 33 in which separated particulate material can collect.

It will be seen that the device shown in FIG. 6 operates largely in the same manner as the device shown on the right-hand side of FIG. The diverted portion is directed by a baffle and a pipe to a helical tube and/or a separate container for the particles. In the arrangement of FIG. 6 the diverted flow is confined within the detachable nozzle portion 22 , particles can be collected in the annular space 33. When the nozzle part 22 contains a substantial amount of particulate material, it can be removed from the main part 21, shaken or otherwise processed to remove the particles from the nozzle part and reattach it to the main part of the cleaner, use again.

It should be noted that although, as exemplified above, pressure differentials are an essential part of the method and apparatus of the present invention, as previously explained, pressures can be equalized within the apparatus, with the presence of The subsequent return flow of fluid joins the diverted flow, eliminating the need for pressure seals and the absence of particulate material blocking the gap.

Claims (27)

1. one kind is flowed isolated method to granular materials by fluid, this method is included in the baffle plate of a porous of rotation in the fluid stream, this baffle plate allows that fluid passes it, the rotation of baffle plate puts in the fluid stream, basically the streamline with the major part of incoming flow is vertical at stream and the baffle plate position of meeting in the front of the baffle plate of porous, particle and baffle plate are collided, the result gives particle kinetic energy on tangential direction, thereby these particles are entrained in the part that is diverted of fluid stream, towards the peripolesis of the baffle plate of porous.

2. according to the method described in the claim 1, it is characterized in that, the part that is diverted of described fluid stream is directed to a space, there it by near the front surface of the rotation of perforated baffle separately, thereby the separated particle of holding in the part that is diverted of described stream can not meet with the fluid stream near butterfly.

3. according to the method described in claim 1 or 2, it is characterized in that, the part of passing perforated baffle of fluid stream is sent back to, add that part of fluid stream that turns to that comprises the granular materials of being carried secretly that will separate around baffle plate.

4. according to any one described method in the claim of front, it is characterized in that, be used for making the device of the baffle plate rotation of porous also to comprise being used for the device that fluid stream is flowed.

5. according to the method described in the claim 4, it is characterized in that the turbine of an integral body makes the baffle plate rotation.

6. according to any one described method in the claim of front, it is characterized in that the front of the baffle plate of rotation is provided with a shielding part along circumference, the described part that is diverted of directed flow and be entrained in wherein particle.

7. according to any one described method in the claim of front, it is characterized in that, the described part that is diverted of stream is led to a container, there, at least a portion solid particle that wherein comprises is isolated by fluid.

8. according to any one described method in the claim of front, it is characterized in that, at least a portion of the part that is diverted of the stream that comprises the solid particle that will separate is returned in the fluid stream of arrival.

9. according to any one described method in the claim of front, it is characterized in that, particulate matter is added in the fluid stream that arrives.

10. according to any one described method in the claim of front, it is characterized in that,, make entrained particles material in stream by fluid stream being pointed to granular materials, prepare the fluid stream that comprises granular materials.

11., it is characterized in that according to any one described method in the claim of front, the described part that is diverted of fluid stream is being introduced a chemistry or physical process alternatively after wherein a part of granular materials having been removed, be used for delivery of particulate material.

12., it is characterized in that fluid is a gas according to any one described method in the claim of front, wherein, during for example water introduction fluid flows a kind of liquid.

13. method of in comprising, removing harmful granular materials by fluid during any one described method according to the front claim.

14. method of in comprising, removing granular wastes by fluid during any one described method according to the front claim.

15. method of in comprising, isolating desired granular materials during any one described method according to front claim 1 to 10.

A 16. chemistry or physical process during any one described method in comprising according to the front claim.

17. isolate the device of granular materials with cause fluid stream for one kind, this device comprises:

A pipeline is used for carrying the fluid stream that comprises the granular materials of carrying secretly;

The baffle plate of a porous, it is mounted in pipeline about an axis rotation, this axis puts in the fluid stream, the baffle plate of described porous allows that fluid stream passes it, the front of baffle plate is located in the pipeline, thereby it is vertical with the streamline of the major part of incoming flow at the basic soil in the position that stream and baffle plate meet; And

Be used for making the device of the baffle plate rotation of porous.

18. according to the device described in the claim 17, it also comprises the device of a part that is diverted that is used for guiding fluid stream, this part stream comprises particle, the front surface of these particles and baffle plate is collided, being rotated in of baffle plate given particle kinetic energy on the tangent direction as a result, thereby the peripheral described particle on described surface is entrained in the described part that is diverted of fluid stream; Described guiding device is arranged to the part that is diverted of described fluid stream is directed to a space, there it by near the front surface of the rotation of perforated baffle separately, thereby the separated particle of holding in the part that is diverted of described stream can not meet with the fluid stream near butterfly.

19. according to the device described in claim 17 or 18, it also comprises the device that the part of passing baffle plate of fluid stream is sent back to, adds that part of fluid stream that turns to that comprises the granular materials of being carried secretly that will separate.

20. according to any one described device in the claim 17 to 19, it is characterized in that, be used for making the device of baffle plate rotation also to comprise being used for the device that fluid is flowed.

21. the device according to described in the claim 20 is characterized in that, perforated baffle and a turbine are one.

22. according to any one described device in claim 17 or 21, it is included in a guiding shielding part along circumference of the front of butterfly, it or fixing, perhaps rotate with baffle plate.

23. according to any one described device in the claim 17 to 22, it comprises a pipeline, can connect into it the front of the stream that is diverted of the fluid that comprises granular materials by perforated baffle is sent in the container.

24. comprise vacuum cleaner according to any one described device in the claim 17 to 23.

25. comprise according to any one described workshop or shop equipment or chemistry or industrial processes factory that is used for removing the granular wastes device in the claim 17 to 24.

26. be provided with according to any one described fluid treating plant that is used for removing deleterious particle thing device in the claim 17 to 23.

27. when by form according to any one described device in the claim 17 to 23 or be used for when comprising this device being attached on the gas extraction system of combustion engine by exhaust in remove the device of degranulation.

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