• 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 present invention relates to a rotary filter (1) for the fibrous suspension (S), the rotary filter is a rotor (2) disposed coaxially inside the filter cylinder (4), and an annular shape formed between the rotor and the filter cylinder One or more wing-shaped portions 15 comprising a hollow portion 8, the annular hollow portion 8 being fixed to an outer surface 2a of the rotor 2 extending axially along the rotor 2. And the outer surface 16 of each wing 15 facing the filter barrel 4 has one or more discontinuous zones 16b, 16d, the points of which are the rotors 16b, 16d. When the outer surface 16 of the wing 15 is connected in the direction opposite to the rotational direction V of (2), it is made to have an increasing distance from the longitudinal axis 3 of the rotor 2.
    公开号:KR20040010593A
    申请号:KR10-2003-7010755
    申请日:2002-02-14
    公开日:2004-01-31
    发明作者:스테파노 니콜리
    申请人:코메르 에스.피.에이.；
    IPC主号:
    专利说明:

    Filter for fibrous suspensions
    [2] It is well known that a mechanism called a strainer is used to separate substances that foul fibrous aqueous suspensions, such as suspensions used in the paper industry. The strainer is generally a rotary filter in which the separation of unfiltered material from the suspension takes place via a so-called high density screening process.
    [3] For example, according to the prior art described in Italian Patent Application No. VI98A000008 filed by the applicant, the rotary filter comprises a central rotor having a filter barrel disposed around it, and the filter barrel and the central rotor are inserted into the fixed housing. have. The suspension to be clarified is delivered to the annular hollow formed between the rotor and the filter barrel via a plurality of diffuser ducts in a feed zone at the top of the housing.
    [4] The fibrous suspension here is rotated by centrifugal force to separate into two parts, the first part of which is generally referred to as "pass through" and is the filtered part used in a continuous working step for the production of paper. The second part, generally referred to as "disposal", consists of the unfiltered material of the fibrous suspension to be continuously discharged, which is left inside the hollow and collected in the discharge chamber disposed at the bottom of the housing.
    [5] Unfiltered material left inside the hollow portion during separation at the side wall of the filter can easily block the opening of the wall, causing a phenomenon called "mat formation" in technical terms. This phenomenon is the cause of the deterioration of the filter power, and periodic adjustments are necessary to perform the cleaning or rearrangement of the filter barrel.
    [6] Systems are known which use vanes aligned inside the hollow and fixed to the rotor to solve the problem of "mat formation", wherein the rotating vanes reliably clean the surface of the filter barrel. According to this system, the vane inside the rotating hollow generates a pulsating vacuum that blocks the walls of the filter barrel to separate the fibers. The apparatus using the system described above aims to optimally clean the filter barrel.
    [7] EP-A-0206975, for example, describes a filter with a wing shape, the surface of the filter facing the filter tube initially increases in distance to the filter cylinder and later decreases, initially producing positive pressure Later, it is said to generate negative pressure. However, the use of a filter with this type of vane has been proven to have the disadvantage of generating positive pressure waves that block the filter vessels and cause jamming when the density increases.
    [8] International Patent Publication No. WO 90/07807 is also known, wherein the wing section extends in an axial and circumferential hollow portion, has a convexly curved shape and has a surface facing the filter tube, the points of which surface It has a regularly decreasing distance with respect to the center of rotation of the rotor when it is continued in the direction opposite to the direction of rotation of the rotor. When the rotor is rotated, the wing portion that rotates with the rotor generates a pulsation pressure wave in which the pressure is constantly reduced, and forms the wing surface from the tip to the end along the direction opposite to the rotation direction of the rotor.
    [9] This constant decrease in pressure change represents a limitation that the complete separation of the non-filtered material does not block the holes formed in the walls of the filter barrel, so that an optimal cleaning of the filter barrel, which maintains constant filter performance, cannot be achieved. .
    [1] The present invention relates to rotary filters for fibrous suspensions, and more particularly to rotary filters used for separation of foreign matters and polluting contraries.
    [22] 1 is a longitudinal cross-sectional view of a rotary filter according to the present invention;
    [23] 2 is an isometric view of the rotor according to the invention,
    [24] 3 is a plan sectional view of a filter according to the present invention;
    [25] 4 is an enlarged partial view of the cross-sectional view shown in FIG.
    [26] 5 is an enlarged view of a portion of FIG. 4.
    [10] The present invention aims to overcome the above limitations.
    [11] More specifically, it is an object of the present invention to provide a rotary filter which improves the separation of fibers deposited on the inner surface of the filter barrel as compared to the conventional rotary filter.
    [12] Another object of the present invention is to provide a rotary filter capable of processing an increased amount of fibrous suspension per unit time compared to a conventional rotary filter.
    [13] Another object of the present invention is to provide a filter which can further improve the degree of purification of the fibrous surface as compared with known filters.
    [14] The above objects are achieved by manufacturing a filter for a fibrous suspension, according to the claims, the filter comprising a rotor having a generally vertical longitudinal axis, a filter barrel disposed coaxially with the rotor outside of the rotor, An annular hollow formed between an outer side and an inner side of the filter barrel, an outer housing adapted to receive the filter barrel and the rotor, a feed for the fibrous suspension to be formed on top of the housing and in communication with the top of the rotor Chamber, discharge chamber for the filtrate formed on the outer surface of the filter barrel, discharge chamber for the non-filtrate formed in the lower portion of the housing, a plurality of disposing the supply chamber in communication with the annular hollow portion A duct and a convexly curved outer surface each facing said filter barrel and extending between a tip and a tip, And at least one wing-shaped portion disposed on an outer surface of the rotor in the annular hollow portion, the tip of which has a distance greater than the distance from the longitudinal axis to the distal end. The outer surface of the wing portion is provided with one or more discontinuous zones, characterized in that the points of the discontinuous zone has a distance that increases from the longitudinal axis when the outer surface of the wing shape in the direction opposite to the rotation direction of the rotor .
    [15] According to a preferred embodiment, the filter of the present invention has five vanes arranged about the longitudinal axis over the entire length of the rotor and arranged symmetrically with respect to the axis of rotation of the rotor according to the vertices of a regular pentagonal structure. .
    [16] Each vane faced the filter barrel and has a convexly curved outer surface consisting of three staircases connected to each other by discontinuous zones formed two by two radial surfaces.
    [17] According to another exemplary embodiment, the number of steps formed by the wing shape and the curved shape of each wing shape may be different in number, such as five or three wing shapes, respectively.
    [18] According to one embodiment, the radial surface is disposed radially with respect to the longitudinal axis of the rotor.
    [19] The blades are connected to the outer surface of the rotor through connecting blocks disposed adjacent to the upper and lower ends of the rotor, respectively.
    [20] Preferably, the rotary filter of the present invention has improved filtration performance, increased filtration amount per unit time, and less washing adjustment compared to equivalent rotary filters of known type.
    [21] The objects and advantages described above will be better understood with the description of the preferred embodiments of the present invention, which is illustrative but not restrictive, with reference to the accompanying drawings.
    [27] As shown in Figs. 1 to 3, the rotary filter of the present invention, generally indicated by reference numeral 1, is disposed about the longitudinal axis 3 in the vertical direction, and is connected to a driving means not shown in the drawing. A generally cylindrical rotor (2) adapted to rotate, and a plurality of openings (5) disposed generally coaxially with the rotor (2) on the outside of the rotor (2) and formed on the outer surface (6) and generally referred to And a filter barrel 4 forming a filter surface indicated by the sign 7.
    [28] The outer housing 9 houses a filter barrel 4 and a rotor 2 and a hollow portion 8 formed between the outer surface 2a of the rotor 2 and the filtering surface 7 of the filter barrel 4. . Inside the housing 9 there is a feed chamber 10 for the fibrous suspension S to be filtered which is formed on top of the housing 9 and is in communication with the top 2b of the rotor 2, A discharge chamber 11 for the filtrate formed on the filtration surface 7 of 4) and a discharge chamber 12 for the non-filtrate formed at the bottom of the housing 9 are provided.
    [29] The rotor 2 is generally indicated by reference numeral 13 and is provided with a plurality of ducts for arranging the supply chamber 10 in communication with the annular hollow portion 8. Each duct 13 has an inlet portion 2c formed in the upper bottom of the rotor 2 partitioning the supply chamber 10 and an outer surface 2a of the rotor 2 partitioning the hollow portion 8. It is formed between the formed exit parts 14.
    [30] Outside the rotor 2 there are five identical vanes 15 which are symmetrically aligned with respect to the axis of rotation 3 of the rotor 2, these vanes 15 being the total length of the rotor 2. It is arranged in the axial direction over (L). In the following description with reference to the drawings described above, only one of the five wing sections 15 will be described in detail, but the description described for one wing section applies to any other wing section.
    [31] As shown in Figs. 3 to 5, each wing 15 has a tip 15a disposed at a predetermined distance R1 with respect to the longitudinal axis 3 of the rotor 2, This distance R1 is longer than the distance R2 to the end 15b.
    [32] According to the invention the outer surface 16 of the wing 15 has two discontinuous zones 16b and 16d, the points of which are in the direction of rotation of the rotor 2 indicated by an arrow V. It has an increasing distance from the longitudinal axis 3 so that the outer surface 16 of the wing 15 in the opposite direction is continuous. Accordingly, the convexly curved outer surface 16 of the wing portion 15 includes three stepped portions 16a, 16c, 16e connected to each other by the discontinuous regions 16b, 16d, each discontinuous. Zones 16b and 16d consist of generally flat surfaces 16f and 16g.
    [33] More specifically, the first step 16a starts at the tip 15a and ends in the first discontinuous section 16b. The points on the surface of the first step 16a have a predetermined distance from the longitudinal axis 3 of the rotor 2 to the minimum distance R3 from the maximum distance R1. The second staircase 16c starts at the first discontinuous zone 16b and ends at the second discontinuous zone 16d, and, like the first staircase 16a, the points on the surface thereof are longitudinal axes of the rotor 2. Regarding (3), the predetermined distance is reduced from the maximum distance R4 to the minimum distance R5.
    [34] In a similar manner, in the third step 16e, which starts in the second discontinuity section 16d and ends at the end 15b, the points on the surface thereof are the maximum distance R6 from the longitudinal axis 3 of the rotor 2; Has a predetermined distance decreasing to the minimum distance R2.
    [35] Thus, the points of the corresponding surfaces 16f and 16g in each discontinuity zone 16b and 16d respectively increase from distance R3 to distance R4 and distance R5 to distance R6 to the rotor 2. It has a predetermined increasing length from the longitudinal axis 3 of the rotor 2, which extends from one step portion to another in a direction opposite to the rotational direction V of ().
    [36] The discontinuous zones 16b and 16d extend in the axial direction over the entire length L of the wing portion 15 to have the shape shown in detail in FIG. Each wing 15 is connected to the rotor 2 by intervening connecting blocks 17a and 17b that are fixed by screws, welding, or the like. The arrangement of the connecting blocks 17a, 17b separates the wing 15 from the rotor 2, whereby the wing 15 is completely surrounded by a suspension S filled in the hollow 8. All.
    [37] Due to the curved shape of the vane 15 in which the distance from the longitudinal axis 3 is reduced, the outer surface 16 of each vane 15 consists of a series of pulsating negative micropressures (microwaves) It generates a series of pulsating negative macropressures (macrowaves), which are generated by the special stepped shape of each wing 15 having the features described above. The pulsating negative micropressure is not generated in a known filter of equivalent type, but when combined with such a pulsating negative macropressure, even more effective adhesive yarns result in more effective separation from the filter tube 4, thereby improving filter performance.
    [38] It is clear from the foregoing description that the filter of the invention achieves the intended purpose.
    [39] In structural terms, other modifications not described in the embodiments and not shown in the accompanying drawings can be applied to the filter of the present invention. Such structural modifications may include, for example, a different number of wings, other arrangements of wings formed along the outer surface of the rotor, or other arrangements or arrangements of means for securing the wings to the rotor. On the other hand, structural changes that are not described or illustrated will fall within the scope of the claims according to the invention.
    权利要求:
    Claims (8)
    [1" claim-type="Currently amended] A rotor (2) having a generally vertical longitudinal axis (3), a filter barrel (4) disposed coaxially with the rotor (2) outside the rotor (2), and an outer surface (2a) of the rotor (2) And an annular hollow portion 8 formed between the inner surface of the filter barrel 4, an outer housing 9 adapted to receive the filter barrel 4 and the rotor 2, and an upper portion of the housing 9. Supply chamber 10 for the fibrous suspension S to be filtered which is in communication with the top 2b of the rotor 2, discharge for the filtrate which is formed on the outer side 6 of the filter barrel 4. A plurality of ducts for arranging the chamber 11, the discharge chamber 12 for the non-filtrate formed in the lower part of the housing 9, and the supply chamber 10 in communication with the annular hollow part 8. (13) and a convexly curved outer surface 16 facing the filter barrel 4 and extending from the tip 15a to the tip 15b, respectively, wherein the tip 15a is the longitudinal axis 3; To the outer surface 2a of the rotor 2 in the annular hollow part 8, which is arranged at a distance R1 longer than the distance R2 to the distal end 15b relative to the end 15b. In the rotary filter (1) for the fibrous suspension (S) consisting of at least one wing-shaped portion 15 disposed about the longitudinal axis (3) along
    The outer surface 16 of the wing 15 has one or more discontinuous zones 16b, 16d, the points of which are discontinuous in the direction of rotation V of the rotor 2 Rotary filter, characterized in that it has an increasing distance from the longitudinal axis (3) when the outer surface (16) of the wing portion (15) in the direction of being.
    [2" claim-type="Currently amended] The pair of staircases (16a) according to claim 1, wherein each of the discontinuous zones (16b, 16d) is formed along the longitudinal direction of the rotor (2), and the surfaces are radially disposed by the discontinuous zones (16b, 16d). , 16c; 16c, 16e) is formed on the outer surface (16).
    [3" claim-type="Currently amended] 2. The rotary filter according to claim 1, wherein each of the discontinuous zones (16b, 16d) is formed with a flat surface.
    [4" claim-type="Currently amended] 4. The rotary filter of claim 3, wherein the flat surface is disposed radially.
    [5" claim-type="Currently amended] 2. The rotary filter according to claim 1, wherein each of said discontinuous zones (16b, 16d) is partitioned by a curved surface.
    [6" claim-type="Currently amended] 2. The rotary filter according to claim 1, wherein the length between the tip (15a) and the tip (15b) is in the range of 100 mm to 600 mm.
    [7" claim-type="Currently amended] 7. The rotary filter according to any one of claims 1 to 6, wherein each vane portion (15) extends in the axial direction over the entire length (L) of the rotor (2).
    [8" claim-type="Currently amended] 2. The rotor (2) according to claim 1, wherein each of the vanes (15) is secured by means of fastening means and connecting blocks (17a, 17b) spaced apart from the vanes (15) by the rotor (2). Rotary filter, characterized in that connected to.
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    同族专利:
    公开号 | 公开日
    CN1491303A|2004-04-21|
    NO20033496L|2003-09-24|
    CA2435616A1|2002-08-22|
    EP1360371A1|2003-11-12|
    ITVI20010039A1|2002-08-16|
    US20040065600A1|2004-04-08|
    JP2004522869A|2004-07-29|
    WO2002064884A1|2002-08-22|
    NO20033496D0|2003-08-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2001-02-15|Priority to ITVI2001A000039
    2001-02-15|Priority to IT2001VI000039A
    2002-02-14|Application filed by 코메르 에스.피.에이.
    2002-02-14|Priority to PCT/EP2002/001548
    2004-01-31|Publication of KR20040010593A
    优先权:
    申请号 | 申请日 | 专利标题
    ITVI2001A000039|2001-02-15|
    IT2001VI000039A|ITVI20010039A1|2001-02-15|2001-02-15|rotary filter for fibrous suspensions|
    PCT/EP2002/001548|WO2002064884A1|2001-02-15|2002-02-14|Filter for fibrous suspensions|
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