• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a device for separating particles from a liquid, mainly from gas. A cyclone, with a lower conical part, has i.a. a lack of separation ability for fi naparticles, as the turning point of the main vortex varies with fl fate and the separation is also disturbed by turbulence in the congested turning zone. By using cyclones with a circular vortex fl ector (4) with surrounding passages (5) to a particle chamber (3) mounted below, the vortex turns in a controlled manner in the same place regardless of the flow and the particle separation takes place at an appropriate distance from the high speed zone, above the vortex the now purified stream of particles leaves the device through an outlet channel (7). By arranging the position of the outlet duct (7) in relation to the vortex generator (4), a high separation efficiency can be achieved. The solution is suitable for application of flue gas purification and collection of powdered material in powder form.
    公开号:SE1000863A1
    申请号:SE1000863
    申请日:2010-08-25
    公开日:2012-02-26
    发明作者:Adrian J Cabezas Morales
    申请人:Centriclean Systems Ab；
    IPC主号:
    专利说明:

    Detailed description of the invention The present invention is basically a combination of a traditional cyclone and a cone-axial cyclone, respectively, with the addition of the present invention and consists of a larger cyclone tube, which has inlets and outlets at the same end and whose inlet is connected to a pressurized gas source, or provided with a blowing member, eg a genuine, alternatively a suction member connected to the outlet, which moves eg gas into the cyclone tube against a static vortex generator, built around a central outlet tube, which puts gas and particles in helical paths against a vortex flector at the other end of the tube. The vortex generator consists of skru er screw-shaped channels built up of guide rails. The vortex generator is given an optimal length and its guide rails optimal input and output angle for best separation sharpness and minimum pressure. The flow velocity and flow direction are controlled by the number of guide rails and their height and angle to the center axis and thus the residence time of the particles before they reach the entrance to a particle chamber, located behind a central vortex ectector surrounded by openings. If the eiclone is to be used for varying fl fates, eg a lower one, the flow area in the vortex generator can be reduced by, for example, an inflatable central wall.
    The separation efficiency is proportional to the tangential velocity squared divided by the inner radius of the cyclone tube, or rather the current radius position of the particles. However, the pressure drop also increases with this ratio and the final parameter choice becomes a compromise. An overall goal is that the flow through the device should be as turbulent as possible, in addition to the useful cyclone vortex. A short vortex generator ensures a largely laminar flow and that the particles get the right angle and a reasonably long residence time in the cyclone, so that they have time to fall out towards the boundary layer of the wall before they reach the height of the lower end of the outlet duct, risking being sucked into the outlet duct minimized.
    When the gas vortex reaches the vortex ktector, it quickly returns to the central outlet channel through the center of the vortex generator and further out of the cyclone. The relatively large distance between the separated particles in the boundary layer along the inside of the cyclone tube and the location of the rapid rotation of the vortex in the center of the cyclone is assumed to contribute to the surprisingly effective separation of the particles. The explanation is probably more complicated than that. In order to achieve the really high separation efficiencies, an extensive parameter study has pointed out that the distance between the lower edge of the outlet duct and the vortex flector is extremely important. If the length of the outlet duct is increased gradually, the efficiency rises to a maximum level, and then falls rapidly. Best efficiency is usually achieved when the distance between the inlet end of the outlet duct and the vortex ectom is about a quarter of the distance between the inlet of the cyclone and the vortex ectom.
    The solution with a vortex görector means that the vortex down in the particle chamber is weak, which counteracts the re-fate of particles upwards in the system. However, it has been shown that the smallest particles have the ability to rise upwards anyway. By leading the vortex in the particle chamber towards its wall and blocking the upward particle flow with a circular plate under the vortex flector, a dramatic reduction of small particles in the cyclone outlet is obtained.
    An embodiment of the invention consists of a cylindrical cyclone tube 1, which is connected at 2 to a particle chamber 3. At the connection 2 there is a vortex 4 vector 4 which consists of a round disc and is centered so that one or more circumferential slots 5 are formed for the passage of trapped particles. to a particle chamber 3. Below the vortex ectom is mounted a rotationally symmetrical diverter plate 12, which prevents the smallest particles from flowing back upwards through the circumferential slots 5. In the upper part of the cyclone tube 1 there is a vortex generator 6 and its outer radius is the same as the inner radius of the cyclone tube 1. An outlet channel 7 is continuous through the vortex generator 6, the sieve flow channels, towards the center axis of which can be delimited by the outlet channel 7, or by a further centrally located rotationally symmetrical wall, in order to reduce the flow area. The larger cyclone tube 1 extends a bit above the vortex generator 6 where one or more of the flow tubes 8 are connected.
    The vortex generator 6 forces the gas with particles to rotate at the angle to the center axis of the cyclone that the vortex generator 6 has at its end point. Because the density of the particles is higher than that of the gas, they accumulate on the inner surface of the cyclone tube, due to the centrifugal force, in their path down to the vortex flector 4. The gas continues to vortex down to the vortex där ectom 4 where it is forced to turn, partly by the actual stop and partly by the only the way out is through the outlet channel 7.
    The vortex ect ect 4 is, as mentioned above, a circular plate having one or more circumferential slots 5 between its outer diameters and the inner diameter of the large cyclone tube 1. At the vortex reflector 4, the gas is forced towards the center of the cyclone tube 1, from all directions, thus forming a stagnation point 9. To get past and over the stagnation point 9, the velocity of the gas increases in the direction of the outlet duct 7. The relatively large distance between the separated particles in the boundary layer along the inside of the cyclone tube 1 and the phenomenon at the stagnation point 9, where the gas suddenly accelerates in the opposite direction, causes the particles to be caught very efficiently in the particle chamber 3. Also the fact that the distance between the lower end of the outlet duct 7 and the vortex generator 6 is made sufficiently long in order for the smallest particles to have time to be trapped in the boundary layer before they reach the said end, also contributes greatly to a good efficiency.
    The vortex generator 6 can either have a fixed angle of rotation or a rising edge, i.e. that the starting angle is less tangential than the end angle. The end angle of the vortex generator 6 determines how many revolutions the particle flow passes before it reaches the particle chamber 3. The vortex generator 6 is hollow, from the center to the same outer diameter as the outlet channel 7, seen from above.
    The vortex former 6 consists, for example, of 2 guide rails 10 which rotate at least 80 degrees each, seen from above, or 3 guide rails which rotate at least 120 degrees each, or 4 guide rails, etc. The flow area between all the guide rails 10, as well as the flow, determines the instantaneous velocity that the gas and the particles receive, when they have just left the vortex generator 6. To regulate and increase the speed, it is possible to reduce the fate area between the guide rails 10, by inserting an extra centrally located inner wall between the outlet duct 7 and the cyclone tube 1.
    The vortex 4ector 4 acts as a trampoline for the gas seam as it chooses to seek towards the center of the cyclone tube 1 instead of penetrating into the circumferential slots 5.
    The solution with a vortex 4 vector 4 means that the vortex at the bottom of the particle core 3 is weak, which counteracts the backflow of particles upwards in the system. However, it has been found that the smallest particles have the ability to rise upwards. By directing the vortex in the particle chamber 3 towards its wall and blocking the upward particle flow with a circular plate 12 below the vortex reflector 4, a dramatic reduction of small particles in the outlet channel 7 is obtained. .
    It is also possible to arrange an axial inlet 15 above the vortex generator 6 and then also provide it with a conical flow conductor 18, in order to avoid turbulence.
    权利要求:
    Claims (1)
    [1]
    A device for separating particles from a desolate part, with a cylindrical part in the form of a cyclone tube (1), with one or more inlets (8, 15) and a central outlet channel (7), which begins at a lower end (16) and ends over the respective inlet (8,15), there being at the bottom of the cyclone a vortex fl (4), centrally located having one or openings (5) in the periphery, to let separated particles down to a particle chamber (3), CHARACTERIZED in that the perpendicular distance between the lower end (16) of the outlet channel (7) and the vortex ((4) is 10-5 0% of the distance , from a point (14,17) at alternate inlet types (8,15) and the plane of the vortex ((4). A device according to claim 1, CHARACTERIZED in that the vortex (ector (4) is provided with a circular fl fate conductor (12), mounted on the underside of the vortex kt ect, pointing downwards and extending outwards a bit below and past the openings (5), to block back fl fate upwards from the particle chamber (3). A device according to any one of the preceding claims, CHARACTERIZED IN THAT a vortex generator (6) is equipped with an inner cylindrical wall (1 1) separated from the outlet channel (7), which enables a smaller fl area of destiny and thus a higher fl velocity velocity, while the particles have shorter way to fall out towards the cyclone pipe (1), which in total gives a better separation efficiency. A device according to claim 3, CHARACTERIZED in that the inner wall (11) is cylindrical and placed in a specific radial position so that the speed of fate in the vortex generator (6) is higher than 20 m / s. A device according to claim 3, CHARACTERIZED in that the inner the wall (11) widens towards a larger radius towards its lower part so that the speed of fate out of the vortex generator (6) is higher than 20 m / s.
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    同族专利:
    公开号 | 公开日
    SE535953C2|2013-03-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2013052000A1|2011-10-06|2013-04-11|Husqvarna Ab|Dust collector with a constant suction force|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1000863A|SE535953C2|2010-08-25|2010-08-25|Device for separating particles from a flow|SE1000863A| SE535953C2|2010-08-25|2010-08-25|Device for separating particles from a flow|
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