• 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:
    Methods and apparatus for concentrating liquid-containing substances are disclosed. The disclosed method includes contacting liquid-containing substances such as fiber suspensions with separating means as the substance flows in a first direction so that a portion of the liquid is separated from the liquid-containing substance, withdrawing the liquid through the separating means in a second direction, intermittently interrupting the flow of the liquid downstream from that point of withdrawal to terminate the flow of the liquid through the separating means and preventing return flow of the separated liquid through the separating means. The apparatus disclosed includes means for directing the flow of the liquid-containing substance in a first direction, separating means for separating a portion of the liquid therefrom in a second direction, means for interrupting the flow of the separated liquid downstream from the separating means in a second direction, and means for preventing the return flow of the liquid through the separating means. In a preferred embodiment the apparatus includes a membrane which acts as a non-return valve for the separated liquid during interrupted flow of the separated liquid.
    公开号:SU1074409A3
    申请号:SU772550003
    申请日:1977-12-05
    公开日:1984-02-15
    发明作者:Эрик Бергстедт Карл
    申请人:Сандз Актиеболаг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a device for washing and thickening the fibers of that suspension, preferably a pulp suspension, and is intended for use in the pulp and paper industry. A device is known for the pro- lection and thickening of a fibrous suspension, preferably a pulp suspension, comprising a vertical housing with branch pipes for feeding suspension to the lower part of the housing and removing the washed suspension from the upper part of the housing, located in the housing coaxially with a filter sieve, distribute the washing liquid mounted in the processing zone of the filtering filter suspension, the chamber for collecting the filtrate with the shut-off valve and the valve For removal of the filter ya passed through the sieve, and means for eliminating clogging sieves in 1. The known device has sufficient design complexity. The purpose of the invention is to simplify the quality of life while maintaining the quality of the processing of the suspension. The goal is achieved by the fact that in a device for washing and thickening a fibrous suspension, a predominantly pulp suspension, comprising a vertical housing with connections for feeding the suspension to the lower part of the housing and draining the washed suspension from the upper part of the housing, located in the housing with the filter sieve. , distributor of washing liquid, mounted in the treatment zone of the filter sieve suspension, chamber for collecting the filtrate with a shut-off valve and a valve for draining the filtrate passing through the sieve, and media to eliminate clogging of the sieve with fiber, the latter is made in the form of a flexible partition fixed to the outer surface of the filter sieve from the side of the branch pipe for removal of progrelty suspension and forming a closed chamber with the sieve, having an outlet into the chamber for collecting the filtrate, and the filter sieve is fixed in the housing . Flexible partition has the shape of a ring. The device has ring lugs fixed on the outer surface of the filter sieve inside a closed chamber, and the flexible section of the partition is made of separate rings, each of which is fixed to the corresponding ring stop by its upper part. A flexible partition can be made of individual elements and have a cross-sectional shape with spherical arcs of a circle. The device can have a carrier partition with openings mounted on annular stops forming filter chambers with filtrate filters and each of individual rings are sszhtirovano on the bearing partition over the corresponding hole. In Fig. 1 shows the proposed device, an axial section, the preferred option; Fig, 2 - radial section A-A in Fig. 1; , axial section, variants; fig, b - device, radial section, option; fig, 7 and 8 - sieve parts; fig.9 device, axial section, alternative; Fig. 10 - section bb on , Fig. 9; Fig. 11 device, Axial section, variant; Fig. 12 - section B-B of Fig. 11; fig, 13 - device, axial section, variant;, Fig, 14 - radial section YYY in Fig. 13. The device (Figs. 1 and 2) has the shape of a cylinder, but may also have a cross section in the form of a rectangle or another shape. The main elements of it are the vertical housing 1 with connections for the delivery of 2 suspensions and the removal of 3 washed suspensions; located in the housing 1, the strainer 4 is coaxial with it; liquid distributor 5, mounted in the processing zone of the filter sieve suspension 4; a chamber 6 for collecting the filtrate with a shut-off valve 7 and a valve 8 for draining the filtrate passing through the sieve; means 9 for eliminating clogging of the sieve with fiber, made in the form of a flexible partition, forming a closed chamber 10 with the sieve 4. from individual rings 12 or from individual elements IV, having the shape of conjugate circular arcs in cross section. The carrier partition 14 is fixed on the annular stops 11 and the image / em with the filter sieve is an intermediate chamber 15 for collecting the filtrate. Fig. 3 shows an embodiment which is slightly different from the one described above. There are stops 11 on the sieve 4, the filtrate chamber 6 is provided with a valve 8 for removing the filtrate (not shown), and if necessary, a shut-off valve 7 in the same way as in the embodiment shown in FIG. 1 and 2. This also applies to the variants corresponding to FIGS. 4, 5 and 6. The stops 11 are arranged so that the chamber 10 is divided into a plurality of
    smaller chambers 15, which are either alternately in communication with one another axially along the screen 4, as well as with the chamber 6 for the filtrate (Fig. 3), or separated from the other and from the chamber b for the filtrate (Fig. 7).
    The device described can be used for treatment with liquids, for example, for the production of: aki, solid mass, the liquid is injected to completely or partially replace the liquid in which the cellulose containing material is suspended. FIG. Figures 1 and 2 show the distributor 5 for: supplying the direct fluid intended to replace the suspension liquid in substantially radial directions, which is shown schematically by dashed arrows. The design and jungle of his can be varied in different ways. However, it is not necessary for it to be a centrally located pipe, but it may consist of feeding devices located elsewhere in the central part of the body or at its periphery.
    For devices with a cylindrical screen, the diameter-to-length ratio is suggested, which is 0.1-1.0, preferably 0.2-0.8, more preferably 0.2-0.5. For certain applications, you can choose both smaller and larger ratios than indicated.
    At-concentration, typically nvdey (1-5) - (8-15)% or higher pulp concentration, the required amount of liquid is separated with a sieve without a liquid supply. When washing or treating with chemicals, for example during bleaching, the treated liquid is fed through the distributor 5, which is positioned relative to the sieve so that the supplied liquid passes through the suspension in counter-current relative to the direction of flow of the suspension. This cross flow creates the effect that the fluid in which the fibrous material is suspended is fully or partially exchanged by the feed fluid.
    The device works in the following way ..
    The cellulosic suspension is fed in the direction of the arrows through the inlet 2, and the washing liquid If necessary, through the distributor 5.
    The filtrate passes through a sieve 4. Therefore, in the central part a mass with a high content of fibrous substances is obtained. With the continuous supply of the pulp mass to the mass through the inlet, the pressure at the inlet rises and, consequently, the pulp is compressed. As a result, the pressure difference above the screening sheath is increased, which leads to an increase in retention capacity. The magnitude of the pointer retarding force or friction force depends, besides the pressure difference, also on the surface properties of the sieve and on the properties of the pulp. Fibers that are pressed into the surface of the sieve have a significant holding and an effort (Fig. 8). When necessary. the pulp usiccti concentration reaches 8–15% or 15–30%, and in some special cases 30–40%, the outlet valve for the filtrate is closed. As a result, the pressure in the filtrate chamber b is increased, and the pressure difference ngsch sieve 4 is then reduced, as a result, the retaining force of the pulp decreases, and the magnitude of such an effort becomes insufficient to hold the pulp. Therefore, the fibrous mass, due to the precompression and increasing pressure at the inlet, is moved in the direction of the outlet 3 of the washed mass. When the inlet pressure decreases, preferably to the initial pressure, the valve 8 re-opens and the filtrate passes through a sieve.
    The process described is repeated and the fibrous mass rhythmically moves to the outlet 1st hole.
    Due to the friction forces acting on the pulp, the pressure in the central portion decreases towards the pulp outlet. Therefore, the pressure in the chamber for the filtrate may exceed the pressure generated in the central part adjacent to the outlet for the pulp, due to the presence of means 9 on the sieve 4, the filtrate cannot return to the side of the mass (Fig. 7).
    When the mass is moved in the central part, a cleaning effect takes place, which prevents the holes in the sieve 4 from being blocked. If the inlet pulp concentration is not high enough and its movement in this part is not fast enough for the cleansing effect , then ito A can not be supplied with a means 9, preventing the reverse flow of Iltrat. The cleaning effect is ensured by the fact that the filter chamber is equipped with a shut-off valve of 7 liters of waste liquid, preferably under high pressure, which is simultaneously connected to the closed valve 8 at the outlet
    Filtrate. In addition to cleaning the holes in the screening sheath, which is obtained by creating the described reverse flow, the fibrous mass is subjected to an additional ejection, which is intensified, as a result, the speed of movement of the fibrous mass in the watered flow direction, i.e. in the direction of the outlet, which simultaneously increases the cleaning effect of the rest of the sieve.
    According to FIG. 9 and 10, the screening of the suspension occurs partly through a sieve 4, and partly through a distributor 5 located in the center of the sieve.
    The embodiment shown in FIG. 9 and 10 is particularly desirable for thickening the suspension. However, flushing is also possible with this option when feeding flushing liquid centrally from the device (not shown) located behind the distributor 5, counting in the direction of flow, or from the device located to the gap between the sieve 4 and distributor b, and they can be stationary or conceived as rotating spray lines.
    I ..
    Work options device
    (Fig. 11-14) is possible considering the fact that between the means 9 and the sieve 4 a space is formed (Fig. 1-10)
    The means 9 used in the device; —can be made of rubber, plastic, fabric, thin profiled sheet metal, and the like. All such tools have. it is common that they are mobile and removed from the sieve. Consequently, the membrane does not have a perfect or low liquid permeability
    The proposed device, while simplifying the design, allows maintaining the high quality of the processing of the suspension.
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    权利要求:
    Claims (5)
    [1]
    1 .. DEVICE FOR RINSING AND THICKENING FIBROUS SUSPENSION, mainly a pulp suspension, including a vertical housing with nozzles for supplying the suspension to the lower part of the housing and for removing the washed suspension from the upper part of the housing, a filter sieve coaxial with it, a liquid distributor mounted in the processing zone of the suspension of the filter sieve, a filtrate collection chamber with a shut-off valve and a valve for draining the filtrate passing through the sieve, and a means for eliminating clogging of the fiber sieve m, the case is that, in order to simplify the device while maintaining the quality of the suspension processing, the means for eliminating the clogging of the sieves is made in the form of a flexible partition mounted on the outer surface of the filter sieve from the side of the nozzle to drain the washed suspension and forming a closed chamber with a sieve, having an outlet into the chamber for collecting the filtrate, and the filter sieve is fixedly mounted in the housing.
    [2]
    2. The device according to π. 1, characterized in that the flexible partition has a ring shape.
    [3]
    3. The device pop. 1, characterized in that it has annular stops fixed on the outer surface of the filter screen inside a closed chamber, and a flexible partition is made of separate rings, each of which is fixed with its upper part to a corresponding annular stop.
    [4]
    4. The device according to paragraphs. 1 and 2, which is characterized in that the flexible partition is made of separate elements and has a cross section in the form of conjugate circular arcs.
    [5]
    5. The device according to claim '3, characterized in that it has a supporting partition from the hole. · W, mounted on annular stops, forming intermediate chambers with a filter screen to collect the filtrate, and each of the individual rings is mounted on a carrier a partition above the corresponding hole.
    SU „„ 107440ft
    类似技术:
    公开号 | 公开日 | 专利标题
    US4501040A|1985-02-26|Method and apparatus for washing stock suspensions by removing undesired material through an endless wire
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    US3448858A|1969-06-10|Centrifugal filtering apparatus
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    US2765915A|1956-10-09|Method of and means for recovering fibers from pulp-water
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    US2891671A|1959-06-23|Filter drum for recovering fibers from liquid
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    JPH086079Y2|1996-02-21|Papermaking screen
    同族专利:
    公开号 | 公开日
    US4157302A|1979-06-05|
    GB1564245A|1980-04-02|
    FI65827B|1984-03-30|
    AU499107B1|1979-04-05|
    SE415202B|1980-09-15|
    BR7708040A|1978-10-17|
    FR2372648B1|1982-04-23|
    DE2754303B2|1980-08-21|
    JPS5378303A|1978-07-11|
    DE2754303A1|1978-06-08|
    JPS5652156B2|1981-12-10|
    DE2754303C3|1981-05-07|
    FR2372648A1|1978-06-30|
    FI65827C|1984-07-10|
    NO774150L|1978-06-07|
    ZA776980B|1978-12-27|
    NZ185763A|1981-02-11|
    SE7613659L|1978-06-07|
    FI773632A|1978-06-07|
    CA1099216A|1981-04-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1270042A|1916-10-27|1918-06-18|Gen Res Lab|Filter.|
    US2066479A|1931-06-08|1937-01-05|Vernon W Macisaac|Fluid straining method and apparatus|
    US2724508A|1954-05-26|1955-11-22|Sun Oil Co|Separator for solid-liquid slurry|
    DE1082575B|1958-06-25|1960-06-02|Krauss Maffei Imp G M B H & Co|Pipe thickener for thickening mass suspensions|
    SE324950C|1967-04-13|1977-02-17|Sunds Ab|PROCEDURE AND DEVICE FOR LIQUID TREATMENT PREFERREDLY WASHING OF FIBER SUSPENSIONS OF CELLULOSA MASS|
    FR2019454A6|1968-09-18|1970-07-03|Sunds Ab|
    SE377995B|1973-08-21|1975-08-11|Alfa Laval Ab|
    US3907681A|1973-11-12|1975-09-23|F W Means & Company|Filter system and method|
    SE386692B|1974-03-14|1976-08-16|Sunds Ab|CONCENTRATION AND / OR LIQUID TREATMENT DEVICE AS WASHING OR BLEACHING OF LIQUID SUBSTANCES, SPECIAL CELLULOSE PULP|
    JPS55519B2|1974-09-11|1980-01-08|
    DE2501733C3|1975-01-17|1979-08-09|Seitz-Werke Gmbh, 6550 Bad Kreuznach|Procedure for determining the switching points for mixed liquids in filtration processes|FI81137B|1986-12-17|1990-05-31|Ahlstroem Oy|FOERFARANDE OCH ANORDNING FOER URVATTNING AV FIBERSUSPENSIONER.|
    NO882815L|1988-06-24|1989-12-27|Sigurd Fongen|PROCEDURE FOR CELLULOUS PREPARATION AND DELIGNIFICATION, WHEATING, DE-INKING AND CLEANING OF CELLULOSE FIBER AND DEVICE FOR CARRYING OUT THE PROCEDURE.|
    SE464641B|1989-06-29|1991-05-27|Kamyr Ab|DEVICE FOR DRAINAGE OF MASS|
    US5567279A|1991-04-16|1996-10-22|Ahlstrom Machinery Inc.|Variable stage pressure diffuser|
    US5567262A|1991-04-16|1996-10-22|Ahlstrom Machinery Inc.|Two stage pressure diffuser|
    US5520805A|1993-07-28|1996-05-28|Majola; Tauno|Filter apparatus including ring shaped elements|
    US5702617A|1995-10-12|1997-12-30|Price; Arnold James|Particular removal assembly and method|
    SE524527E8|2002-06-07|2015-10-20|Metso Paper Inc|Multistage strainer for screening of pulp suspensions|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE7613659A|SE415202B|1976-12-06|1976-12-06|DEVICE FOR CONCENTRATION AND / OR LIQUID TREATMENT OF LIQUID MIXTURES|
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