• 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:

    公开号:AT510192A2
    申请号:T11612011
    申请日:2011-08-11
    公开日:2012-02-15
    发明作者:Reinhardt-Karsten Muerb
    申请人:Automatik Plastics Machinery；
    IPC主号:
    专利说明:

    Device for drying granules
    The invention relates to a device for drying granules, e.g. of plastic material having a housing and a rotor having rotor blades rotatably driven in the housing, with a drainage area having at least one drainage screen with drainage screen openings smaller in size than the granules so that process fluid, e.g. Water, by means of passage from a Siebvorderseite to a Siebrückseite from the Granulatmömern is separable, according to the preamble of claim 1.
    In general, such devices are offered and sold, for example, under the product name CENTRO by the company Automatik Plastics Machinery GmbH. In this case, it is particularly desirable to (further) increase the efficiency of the drying and to reduce the energy requirement for driving the rotor (further) while at the same time not having to significantly increase the design complexity.
    The German patent application DE 10 2007 016 673 A1 shows, for example, a corresponding drying device. Among other things, it is proposed that the drying air there flows counter to the granules in the drying section counter to the conveying direction of the granules.
    It is the object of the present invention to provide a device for drying Granulatkömern from a melt, which overcomes the disadvantages of the prior art, and in particular to provide a device which increases the efficiency of drying in a structurally simple manner and the energy requirements for the drive the rotor does not increase but even lowers. ψ * ψ * * * ·· «· *« · t η f t t * # · * * «·» i
    This object is achieved with a device for drying granules with the features of claim 1. Preferred embodiments of the invention are defined in the subclaims.
    The device according to the invention for drying granules has a housing and a rotor with rotor blades, which is rotatable, e.g. via a motor, having a drainage area, with at least one drainage screen with drainage screen openings having a size smaller than the granules, so that process fluid, e.g. Water, by means of passage from a Siebvorderseite to a Siebrückseite of the granules is separable. The terms Siebvorderseite or, Siebrückseite thereby designate the two sides of the screen surface, namely the side on which the screenings remains, or the back of the screen surface, in the region of the process fluid and the objects, d. H. Granules, which are smaller than the screen openings, pass through the screen openings after passing through. According to the invention, the device also has at least one additional fan, which is arranged so that an additional air flow thereof is impressed in the direction of the main direction of movement of the Granuiatkörner by the housing. With the additional fan according to the invention, both in a compact housing of the device according to the invention due to the impressed (additional) air flow both the separation of granules and process fluid can be done more effectively and at the same time simple and inexpensive energy requirements for driving the rotor can be reduced.
    The rotor assembly may correspond to the construction of a rotary dryer, as it is already used for example under the product name CENTRO of the company Automatik Plastics Machinery GmbH.
    The device according to the invention with the corresponding technical features uses the impressed forces or force components on the granules or the process fluid, impressed by the rotor, so that a movement of the granules or the process fluid in the direction of the Entwässerungssieböffnungen is forcibly coined, so so. Granules and process fluid are separated from each other, In particular, the force component used in this case a .3 * *
    Centrifugal force component, which centrifugally moves the process fluid in an otherwise imposed curve movement, in particular a spiral movement, which is reinforced or accelerated according to the invention by the (additional) air flow impressed by the additional fan.
    According to a preferred embodiment, a pre-separator device may be provided for pre-separation of process fluid and granules, wherein the pre-separator device comprises a pre-separator housing and a pre-separator screen with pre-separator screen openings. Such a construction is particularly compact and inexpensive to produce.
    According to a further preferred embodiment, the additional fan according to the invention can be arranged in the area of the pre-separator device such that the secondary air flow thereof presses the process fluid in a supportive manner through the pre-separator sieve openings of the pre-separator sieve and presses the granules with the remaining process fluid further from the pre-separator housing to the direction of the housing This device according to the invention can make it even more effective, since the corresponding stream of air or of corresponding gas, in particular, for example, inert gas such as nitrogen, can thereby provide an additional drying and / or transport effect for the granules or for the cooling fluid and the granules.
    Preferably, the rotor may also be hollow on the inside and at least in its upstream of the main direction of movement of the granules through the housing area first openings, more preferably stomata, for passage of the additional air flow to its interior, and the rotor may at least in its downstream of the main direction of movement of the granules Having through the housing area second openings, particularly preferably circular openings, for the passage of the additional air flow from its interior. Thus, the drying performance can be further increased due to the correspondingly still additionally impressed additional air flow from the rotor to the dewatering screen or to the Granulatkörnerauslass the housing (see next section), as this may also be further increased material throughput.
    Conveniently, the housing may include an inlet for process fluid and granules in the lower region and a process fluid outlet in the lower region and a granule outlet in the upper region.
    Structurally particularly simple and compact is a preferred arrangement according to the invention, in which the dewatering screen is at least partially disposed around the rotor, and in which the rotor is in the region of the Siebvorderseite and the housing is in the region of the screen back.
    For flexible adaptation of the drying performance and for setting optimized energy utilization with regard to desired degrees of drying of the granules, the additional air flow can be controlled adjustable at least in its intensity, preferably in its intensity by controlling the speed of the additional fan and / or in its intensity and / or direction by additional airflow dampers in the area of the inlet of the housing.
    Particularly preferably, an air humidity measuring device may be provided for this purpose, in particular preferably in the area of the granulate outlet, and a regulating device may be provided which regulates the additional air flow as a function of the air humidity measurement results of the air humidity measuring device, particularly particularly preferably regulates the additional air flow by using the additional fan control via operating parameters of the additional fan ,
    In order to further increase the efficiency of the drying performance of the device, in accordance with a preferred embodiment of the invention for increasing the amount of evaporation / withdrawal amount of process fluid or for preventing the accumulation of corresponding granules in the housing, a · T * · · · · · · · · »· * * · · * * * r » * * · «·
    Exhaust fan for process fluid and / or airborne process fluid can be connected via a connection to the housing.
    The invention will be described in more detail below with reference to the exemplified embodiment. It shows:
    Fig. 1 is a schematic longitudinal sectional view of a section of an apparatus for drying granules according to a preferred embodiment of the invention.
    The apparatus for drying granules according to the preferred embodiment of the invention shown in Figure 1 comprises a housing 1. In this housing 1, there is provided a rotor 2 with rotor blades 12 as a movement imparting device, which granulates the granules and a process fluid due to the different acting centrifugal force components due to e.g. the differently acting inertial forces, each local imparting a different direction of movement. The process fluid with the Granuiatkörnern therein is a Vorabscheidervorrichtung 6 for pre-separation of process fluid and granules with a Vorabscheidergehäuse 7 and arranged there in the lower region Vorabscheidersieb 8 with Vorabscheidersieböffnungen 9 and via an inlet 13 (in Fig. 1 bottom left) to the interior of the Housing 1 and then transported via the rotor 2 with the rotor blades 12 in a substantially helical movement further upwards, wherein the process fluid, in which the granules are originally located there is separated from the granules in a drainage region radially outward. The drainage area is formed by a dewatering screen 4 with drainage screen openings 5 smaller in size than the granules, where the process fluid is forced outwardly through the dewatering screen openings 5 by the centrifugal movement, but the granules do not pass therethrough and thus continue to spiral in the housing 1 can be moved above and there can be removed from the housing 1 via a in Fig. 1 arranged right Granulatkörnerauslass 15 in the upper region. The process fluid is discharged therefrom via a process fluid outlet 14 into the lower region of the housing 1 (bottom right in FIG. 1). The Entwässerungssieb 4 is at least partially disposed around the rotor 2 around, wherein the rotor 2 is located in the region of the Siebvorderseite and the housing 1 is in the region of the Siebrückseite. The rotor 2 is driven, for example, by an electric motor (indicated in FIG. 1 in the upper region of the device). In FIG. 1, a connection for an exhaust fan (not shown in FIG. 1) is shown as branching off on the left in the middle part of the housing 1. The exhaust fan is used here for the additional extraction of process fluid and / or air-atomized process fluid, which has passed through the screen openings 5 on the screen back side of the dewatering screen 4, from the housing 1. Thus, the relative humidity in the air in the region of the housing 1 be further reduced and the drying performance can be increased accordingly. -
    According to the invention, an auxiliary fan 3 is provided, which is arranged so that an additional air flow thereof is impressed in the direction of the main direction of movement of the granules through the housing 1 (in FIG. 1 helically from bottom to top in the housing 1). In this case, the additional fan 3 is arranged in the area of the pre-separator device 6 so that the additional air flow thereof presses the process fluid supportively through the pre-separator screen openings 9 of the pre-separator screen 8 and presses the granules with the remaining process fluid further from the direction of the pre-separator housing 7 to the direction of the housing 1.
    According to the preferred embodiment of the invention shown in Figure 1, the rotor 2 is hollow inside and has in its upstream of the main direction of movement of the granules through the housing 1 lying area first openings in the form of stomata 10 in the rotor 2, for the passage of the additional air flow to his inside. Furthermore, at least in its region downstream of the main direction of movement of the granules through the housing 1, the rotor 2 has second openings in the form of circular openings 11 in the rotor 2 for the passage of the additional air flow from its interior.
    The additional air flow is adjustable in intensity and / or direction controllable by a controller (not shown in Figure 1) the speed of the additional fan 3 and / or by additional air flow throttle 16, which in the region of the inlet 13 there pivotally, for. via servo motors (not shown in Figure 1) are arranged.
    Also, according to the preferred embodiment of the invention shown in FIG. 1, an air humidity measuring device 17 is provided in the region of the granulate outlet 15 and a control device which, depending on the air humidity measurement results of the air humidity measuring device 17, the additional air flow using the control of the additional fan 3 via operating parameters (in particular the speed) Additional fan 3 regulates. The air humidity measuring device 17 can realize, for example, a known non-contact air humidity measurement.
    权利要求:
    Claims (9)
    [1]
    1. Apparatus for drying granules with a housing (1) and a rotor (2) with rotor blades (12), which is rotatable drivable in the housing (1) is arranged, with a drainage area with at least one dewatering screen (4) with Entwässungssieböffnungen (5) having a size smaller than the granules, so that process fluid can be separated by passing from a Siebvorderseite to a Siebrückseite of the granules, characterized in that an additional fan (3) is provided, which is arranged so that an additional air flow thereof is impressed in the direction of the main direction of movement of the granules through the housing (1).
    [2]
    2. Apparatus according to claim 1, characterized in that a Vorabscheidervorrichtung (6) for the preliminary separation of process fluid and granules is provided, wherein the Vorabscheidervorrichtung (6) has a Vorabscheidergehäuse (7) and a Vorabscheidersieb (8) with Vorabscheidersieböffnungen (9).
    [3]
    3. A device according to claim 2, characterized in that the additional fan (3) in the region of the Vorabscheidervorrichtung (6) is arranged so that the additional air flow of the process fluid supportive presses through the Vorabscheidersieböffnungen (9) of the Vorabscheidersiebs (8) and the granules with the remaining process fluid from the direction of the pre-separator housing (7) to the direction of the housing (1) presses.

    9 • *
    [4]
    4. Device according to one of claims 1 to 3, characterized in that the rotor (2) is hollow inside and at least in its upstream of the main direction of movement of the granules through the housing (1) lying region first openings (10), preferably stomata (10 ), for the passage of the additional air flow to its interior, and the rotor (2) at least in its downstream of the main direction of movement of the granules through the housing (1) lying region second openings (11), preferably circular openings (11), for the passage of the additional air flow has its interior.
    [5]
    5. Device according to one of claims 1 to 4, characterized in that the housing (1) has an inlet (13) for process fluid and granules in the lower region and a process fluid outlet (14) in the lower region and a Granulatkörnerauslass (15) in the upper region having.
    [6]
    6. Device according to one of claims 1 to 5, characterized in that the Entwässerungssieb (4) is at least partially disposed around the rotor (2) around, wherein the rotor (2) is in the region of the Siebvorderseite and the housing (1 ) is located in the area of the rear side of the screen.
    [7]
    7. Device according to one of claims 1 to 6, characterized in that the additional air flow is controllable adjustable at least in its intensity, preferably in its intensity by controlling the speed of the additional fan (3) and / or in its intensity and / or direction Additional air flow throttle valves (16) in the region of the inlet (13).
    [8]
    8. Device according to one of claims 1 to 7, characterized in that an air humidity measuring device (17) is provided, preferably in the range of Granulatkörnerauslasses (15), and that a control device is provided, which in dependence of the air humidity measurement results of the air humidity measuring device (17) Additional air flow regulates, preferably with use • • • • • • • • • • • • • • • • - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (3) regulates operating parameters of the additional fan (3).
    [9]
    9. Device according to one of claims 1 to 8, characterized in that a suction fan for process fluid and / or aerated for in the air process fluid via a connection to the housing (1) is anschiießbar. U Aug, 2011 PAWNTANWÄtTe PUCHBERGjtRy BEROÖ ^ PÄRTNER A-1010 Wigi > / 7 / BeJ & sssssssssssssssss 13 Phone 51 513 37 09
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    引用文献:
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    DE2850584C2|1978-11-22|1985-02-14|Buckau-Walther AG, 4048 Grevenbroich|Device for dewatering and drying bulk goods, in particular shredded plastic waste|
    US4337584A|1980-09-05|1982-07-06|Johnson Lawrence D|Heat pump grain dryer|
    JP2956720B2|1991-08-26|1999-10-04|三井化学株式会社|Pellet drying equipment|
    DE4209373C1|1992-03-23|1993-07-01|Automatik Apparate-Maschinenbau Gmbh, 8754 Grossostheim, De|
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    DE102004011325A1|2004-03-09|2005-09-29|Coperion Waeschle Gmbh & Co. Kg|Drying of plastic granules in a hydraulic conveying stream involves centrifugal dewatering and air flow drying of granulate surfaces|
    US8079158B2|2004-09-02|2011-12-20|Grupo Petrotemex, S.A. De C.V.|Process for separating and drying thermoplastic particles under high pressure|
    US7171762B2|2004-10-19|2007-02-06|Gala Industries, Inc.|Self-cleaning centrifugal pellet dryer and method thereof|
    EP1902825B1|2006-09-20|2011-11-09|ECON Maschinenbau und Steuerungstechnik GmbH|Apparatus for dewatering and drying solid materials, especially plastics pelletized using an underwater granulator|
    DE102007016673A1|2007-04-04|2008-10-09|Rieter Automatik Gmbh|Apparatus and method for dewatering and drying a mixture of plastic granules and water|
    CN201417062Y|2009-05-22|2010-03-03|北京化工大学|Segmented rotor particle centrifugal dryer|US20140250709A1|2013-03-05|2014-09-11|Gala Industries, Inc.|Dryers in series with improved throughput|
    DE102014103696A1|2013-03-18|2014-09-18|Heinrich Buzga|Device for drying small-sized material|
    NL1040425C2|2013-10-02|2015-04-07|Technologies Holding B V D|METHOD AND DEVICE FOR SEPARATING LIGHER PARTICLES AND HEAVIER PARTICLES|
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    法律状态:
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    优先权:
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