• 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:
    In the continuous production of paper pulp from ligno-cellulose raw material, the raw material is subjected to grinding and/or delignification by passing it in the form of small pieces between interpenetrating helicoidal surfaces driven synchronously in rotation inside a casing. The pitch of the helicoidal surfaces is arranged to provide at least one supply zone in which the material is driven downstream by rotation of the surfaces and at least one braking zone in which the material is braked.
    公开号:SU738520A3
    申请号:SU762384259
    申请日:1976-07-29
    公开日:1980-05-30
    发明作者:Ломбардо Жерар；Монзи Пьер；Берже Пьер；Де Шудан Кристиан
    申请人:Крезо-Луар (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to a device for lignocellulosic material for the manufacture of paper pulp. A device for lignocellulosic material for the manufacture of paper pulp is known, which includes a housing body for feeding lignocellulosic material located in the body in it. the upper part of the nozzle for removal of the crushed material, located in the lower part of the housing, installed in the housing two parallel rollers with contacting surfaces of the screw-like surfaces and driven with a gearbox for rotating the shafts in one direction 11. A disadvantage of the known device is the following: a very efficient process of crushing lignocellulosic material. In order to improve the grinding efficiency, the device is equipped with temperature control chambers, and the screw surfaces of the shafts have zones with different pitch — a material advance zone, a braking zone, and a zone with a reverse step of compression, with helical surfaces in the zone with a reverse step having windows for promoting the ground material, and temperature control chambers are mounted on the outer surface of the housing, opposite the corresponding zones of the shafts. FIG. 1 shows the proposed device, top view; in fig. 2 - the same, a section of the upper part (along the line A-A) and the lower part (along the line BB); in fig. 3 - version of the device. The ss device has a body 1 of a nozzle in which two parallel shafts 2 and 3 are installed with helical surfaces 4 and 5 in contact with each other. Each shaft 2 and 3 is located at its ends in bearings b and 7, 8 and 9 mounted at the ends of body 1 . Both simultaneous-maine shafts are rotatably driven by engine 10 by means of gearboxes 11 and 12, each of which includes a gear mounted on a continuation of 13 and 14 of each shaft, which is outside one of the bearings 6 and 7, both gearboxes being mounted each at one end of the housing 1 parallel and in the opposite direction. The gearboxes are sized in such a way that shaft1t2 2 and 3 are rotated in the same direction and at the same speed. The housing 1 has holes 15 and 16. The hole 15 is located above the helical surface, and the hole 16 is above the screw-shaped surface. The rotation of the shafts 2 and 3 causes the lignocellulosic material to move between the helical surfaces, and the material enters the opening 15 and leaves the opening 16. The pitch of the helical surfaces varies along the shafts 2 and 3 to determine successive zones with different pitch. The helical surfaces of the shafts have a material advancement zone A of material advancement, the next one is the deceleration zone and the zone with the reverse compression step. The material introduced through the opening 15 passes along the shafts to the opening 16 and slows down, falling into the zone with a reverse compression step, where the thread of the shafts is located so that it tends to direct the material in the other direction. In the stagnation zone, the threads are named after windows 17 and 18 to promote the ground material. On the outer surface of the housing 1, the temperature adjustment chambers 19 are located. , A material (for example wood pulp) with a small amount of water is introduced through the opening 15 and is held down the body 1 due to the rotation of the turns. In zone 6, the material is distributed in thin layers along turns, which are warmly filled. More evenly, the material is distributed in zone 20 (Fig. 2), where the coils interpenetrate. The rotation of the screw surfaces in one direction leads to a uniform inversion of the mass. At the end of the zone B, the turns of the screw surface are gradually filled as a result of braking, which provides by circulating the mass when the direction of the turns changes in the zone with the reverse step of compression. At the entrance to the zone with reverse pitch | Squeeze, the change in the direction of the coils causes a significant accumulation of mass, which creates a strong contraction in this zone, where the defibration ends. Moreover, the braking that occurs as a result of a change in the direction of the coils enhances the combined effect of stress forces in compression and tangential stress. The mass is held in the zone with an inverse step of compression for a longer time and is subjected to MIXTURE. Through windows 17 and 18, the mass passes further as defibration proceeds, and insufficiently defibrated parts are delayed in the working area. The table lists for comparison the characteristics of several mechanical masses, the first of which was obtained by the classical method using disk grinders (A), and others as a result of using the method from a machine according to the invention (B, C, D). In all three cases, spruce chips are used as raw materials.
    Burst Index (French Standard NFQ 03 014)
    Tensile strength indicator
    (French standards NFQ 03 011)
    Consuming energy
    KW / H mass As can be seen from the table, the mechanical characteristics of the mass obtained are 65
    1.1 0.85 0.80
    208,553,411
    1330 840 1070 according to the invention, comparable with the characteristics of the mechanical mass obtained on the grinders. However, energy consumption was almost halved. FIG. 3 shows an embodiment of the device on which it is possible to carry out a continuous change of the subsequent phases of the preparatory processing of paper pulp. The device has a zone I with rather wide turns where the raw material is steamed. In zone 1, the chamber 1 has a temperature control chamber 21. The feed is introduced through the opening 15, and the steam is discharged through a version 22 connected to a vacuum pump. In zone II, the first stage of steaming is carried out in the presence of chemical reagents introduced through the opening 23. In this zone, high pressure can be generated and the required temperature can be obtained with the help of the control chamber 21. In zone III, the thread has a step-like direction, and on the turns there are windows 17 of controlled mass passage downstream. In this zone, the mechanical defibration of the raw material coming from zone II occurs in the main zone. The defibration is carried out in accordance with the indicated process for the mechanical mass. The braking of the raw material at the entrance to zone III entails a squeezing of the mass and the return of possible excess fluid to zone II, from which the liquid can be removed through the opening 24 for possible recirculation. The passage of a wet mass between several interpenetrating screws inside the co. Pusa 1 causes the rise upstream of the liquid and gaseous phases, and the solid phase passes downwards. In zone IV, a second steaming step is carried out under pressure. In this zone, the pitch of the screw can be extended so that the mass again forms a thin layer. The required temperature is maintained by the control chamber 21. In zone V, with more frequent threading, the mass is subjected to a new squeeze with liquids through opening 25. To remove gases there is an opening 26. In such a device, the chemical mass is manufactured in two stages with intermediate defibration. Through the opening 15, raw materials (e.g. wood chips) are introduced with water. The chips are carried downstream by a thin layer, and at the same time the temperature is brought to the desired level using the control chamber 21. Chemical reagents known as delignification agents (sodium hydroxide, monosulfite or sodium bisulfite, carbonate, etc.) are introduced into zone II through aperture 22. To accomplish the first steaming step, the temperature and pressure are kept at the desired level. The effect of pumping between the screws makes it possible to arrange the chips in a thin layer, which greatly facilitates the penetration of chemical reagents into the chips, as well as the precise control of the reaction temperature. Rotation of the shafts in the same direction causes the layers to turn over in zone 20, where the screws interpenetrate, thereby ensuring more uniform processing. With some reagents (sodium hydroxide), reducing their contact time with cellulose allows for a lighter mass. At the entrance to zone III, the cooking chips are strongly compressed by the braking effect resulting from a change in the direction of the pitch of the screws. They are subjected to the joint forces of tangential stress and compression stress, which defibrates the chips. Through the holes in the threads, the mass passes downstream as the defibration process proceeds. The mass is compressed and the fluid goes upstream, which allows the liquid elements to be removed through the opening 24 for possible recycling and allows the mass having a high concentration to be directed to zone IV. In zone IV, which has a wider screw pitch, the mass is again distributed in a thin layer, which facilitates access to chemical reagents and control of the reaction temperature. Chemical reagents introduced into zone IV are known as delignification agents. They are of the same type as the reagents used in the first stage of boiling. In this zone it is also possible to provide for the introduction of oxygen under pressure. Temperature and pressure are determined depending on the reaction carried out and the type of mass produced. The deceleration zone V with more often spaced screws compresses the mass at the end of zone IV. Thus, to remove growth solutions through a hole of 25 liters for waste cleaning and calorie recuperation. The discharge of gases is carried out through the opening-26. The mass exiting through the opening 16 is a chemical mass. After zone III, it is possible to press in a zone similar to zone V,
    权利要求:
    Claims (1)
    [1]
    Claim
    A device for grinding lignocellulosic material for the production of paper pulp, comprising a housing with a nozzle for feeding lignocellulosic material located in the housing in its upper part, and a nozzle for removing the pulped material located in the lower part of the housing, two parallel shafts in contact with each other installed in the housing helical surfaces, and a drive with a gearbox for rotating the shafts in one direction, j characterized in that, in order to increase the grinding efficiency, it supplies On the temperature control chamber, and: s ntovye shaft surfaces have so: -: .. with lichdym step - prsdto zone: 'ma • Therians, braking zone ··> ..- · s. On the opposite step of compression, when -.conformable surfaces in the EC-3 step have windows for them. . crushed material, and then .. temperature control is installed on the outer surface of the housing, opposite the corresponding zones of the halls.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU738520A3|1980-05-30|Device for breaking up lignocellulose material for paper mass production
    US4214947A|1980-07-29|Process for the continuous impregnation of a cellulosic material
    US2008892A|1935-07-23|Method of manufacture of pulp
    US4269362A|1981-05-26|Method and apparatus for beating fibre slurries
    US4457804A|1984-07-03|Apparatus for producing fiber pulp from fibrous lignocellulose containing material
    RU2373314C2|2009-11-20|Unit for producing thermomechanical pulp |, method of thermomechanical refinement of wood chips | and a composite board for refiner disk
    US3533563A|1970-10-13|Method and apparatus for defibrating and simultaneously conditioning cellulose material
    US2323194A|1943-06-29|Apparatus for the production of pulp from cellulosic material
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    US3878698A|1975-04-22|Apparatus for forming and washing a fibrous web
    FI94968B|1995-08-15|Chips Crushing Device
    US3597310A|1971-08-03|Method of producing high yield pulp by disc refining at ph of 12 to 14
    US3016324A|1962-01-09|Method and apparatus for producing wood pulp
    US3238088A|1966-03-01|Continuous digesting of cellulosic fibrous material at decreasing pressure with mechanical defibering therebetween
    CN2291435Y|1998-09-16|Double-screw beating mill
    US5000823A|1991-03-19|Method and apparatus for the processing of groundwood pulp to remove coarse particulate lignocellulosic material
    US4190490A|1980-02-26|Impregnation and digestion of wood chips
    US2812552A|1957-11-12|Mill for effecting separation of pith and fiber from stalky vegetable materials
    AU642160B2|1993-10-14|Improved plug screw feeder
    US4247363A|1981-01-27|Process for producing stone groundwood pulp from wood chips by using a stone grinder
    US1913607A|1933-06-13|Method of preparing pulp
    EP0301000B1|1991-10-16|Screw press
    US2209952A|1940-08-06|Method of liberating paper fibers
    ES489784A1|1980-09-16|Process for preparing a paper pulp.
    US3688345A|1972-09-05|Method for processing fibrous stalks
    同族专利:
    公开号 | 公开日
    FI66658C|1990-07-18|
    JPS575913B2|1982-02-02|
    DE2633041A1|1977-02-03|
    NO762626L|1977-02-01|
    CA1055755A|1979-06-05|
    JPS5218901A|1977-02-12|
    SE7608587L|1977-02-01|
    IT1069527B|1985-03-25|
    NZ181582A|1979-03-28|
    US4088528A|1978-05-09|
    DK148944B|1985-11-25|
    FI762161A|1977-02-01|
    DE2633041C2|1982-05-19|
    BR7604886A|1977-08-09|
    SE422963B|1982-04-05|
    DK343376A|1977-02-01|
    AU502371B2|1979-07-26|
    NO148559C|1983-11-02|
    ES450301A1|1977-08-16|
    AU1643876A|1978-02-02|
    AT354837B|1979-01-25|
    FR2319737A1|1977-02-25|
    FI66658B|1984-07-31|
    DK148944C|1986-05-05|
    NO148559B|1983-07-25|
    FR2319737B1|1980-04-04|
    ATA552876A|1979-06-15|
    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7523911A|FR2319737B1|1975-07-31|1975-07-31|
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