双螺杆揉搓分丝机

第一章、概述：

80年代初，国外有学者指出，木材纤维轴向受压时产生的皱曲作用，使纤维分离，即利用木材纤维轴向受压制浆时，可在低能耗下，生产出纤维长而结合力好的浆。双螺杆揉搓分丝机就是基于这种理论，使纤维离解和细纤维化，纤维切短少, 制得高质量的浆料。

一、Design principle and performance introduction：

In the early 1980s, foreign scholars pointed out that fiber separation was caused by the buckling of wood fibers under axial compression, that is, when wood fibers were used for axial compression pulping, pulp with long fibers and good binding force could be produced with low energy consumption。Based on this theory, the twin-screw kneading and splitting machine makes the fibers dissociate and fibrillate, and the fibers are cut short to produce high-quality pulp。

第二章、双螺杆楺搓分丝机结构组成：

双螺杆楺搓分丝机由电机、特种齿轮箱、组合式螺旋件、半开式壳体、喂料器、液压系统、润滑系统、药液（或水）注入系统、废液回收系统、机座等组成。

其工作部分是由一对平行、啮合且同向旋转的积木组合式螺旋件和内装可拆衬套的半开式壳体组成。壳体上设有液体注入孔和用于提取液体的过滤器。螺旋件可根据工艺需要组成多段浆料输送区、挤压区、挤碾撕裂揉搓区、浸渍处理区、均化混合区。

2.1、输送区：原料被强制性高效率输送；

2.2、挤压区：增加原料密实度，同时脱水浓缩；

2.3、挤碾区：原料受到挤碾、撕裂和均化，并将机械能转变成热能，使原料迅速升温软化；

2.4、浸渍洗涤区：加入药液并进行高浓混合,通过摩擦作用使得浆料和药液充分作用；若加入清水即可完成洗涤作用；

2.5、均化区：浆料进一步受到挤碾、磨解和混合升温。

第三章、双螺杆楺搓分丝机可完成如下功能：

3.1、磨浆——两根相互啮合的螺旋件就象一台高效率的螺杆泵一样将浆料强制性的定向（纤维轴向）挤压和输送，原料在挤碾区纤维轴向受到较大的挤压力和揉搓作用，有利于纤维轴向产生裂纹，强化了药液渗透和纤维分离作用，完成磨浆功能。

3.2、化学浸渍——利用该机可进行多种化学处理并能将药液注入壳体不同的工作区域。它是高效率的高浓混合器，浆料通过挤碾区时被强有力地揉搓。同时，温度和压力的作用可使浆料在高浓下加快化学反应。

3.3、洗涤——该机在高压区装备有效的过滤器，可对原料磨解的同时进行洗涤，可按工艺要求设置多段洗涤区。高的挤压力和有效的揉搓作用可实现高效率的洗涤，同时还可节约清水、降低排污量。

3.4、漂白——可作为高浓反应器完成浆料和漂液的高浓混合。具有高浓（25-35%）、高效、快速漂白的优点。并可节约漂白剂和其他化学药品。

3.5、由于磨浆机理的不同，双螺杆揉搓分丝机磨浆过程中纤维长度的降低幅度远小于盘磨机，但对纤维初生壁（P层）和次生壁外层（S1层）却有极好的破坏效果，这有利于成浆和提高纸的质量。

三、The twin-screw extruder can perform the following functions：

3.1. Pulping: The combined shafts of two mutually meshed spiral parts are like an efficient screw pump. During the process of forcibly extruding and conveying raw materials, wood chips, bamboo chips and other raw materials are subjected to greater extrusion force and kneading in the fiber axial direction in the extrusion grinding area, which is beneficial to fiber axial cracking, strengthening the penetration of liquid medicine and fiber separation, and completing the grinding function of pulp。

   3.2、Chemical impregnation: This machine can be used for a variety of chemical treatments, and can inject liquid medicine into different working areas of the shell. It is a high-efficiency high-consistency mixer, and the slurry is vigorously kneaded when it passes through the squeezing zone. At the same time, the temperature and pressure can accelerate the chemical reaction of the slurry at high concentration。

   3.3、Washing: The machine is equipped with an effective filter in the high pressure area, which can be used to grind chemical mechanical pulp or semi-chemical pulp and wash it at the same time, and multiple washing areas can be set according to the process requirements. High extrusion force and effective kneading can realize efficient washing, and at the same time, it can save clean water and reduce the amount of sewage。

   3.4、Bleaching section: It can be used as a high concentration reactor to complete the high concentration mixing of slurry and bleaching solution. It has the advantage of rapid bleaching under high concentration. And can save bleach and other chemicals。

Due to the different design principles of the equipment, the reduction of fiber length in the pulping process of the double-screw kneading separator is much less than that of disc refiner, but it has excellent destructive effect on fiber primary wall (P layer) and secondary wall outer layer (S1 layer), which is beneficial to pulping and improving paper quality。  

第四章、双螺杆揉搓分丝机的特点：

4.1、双螺杆楺搓分丝机可替代传统的制浆打浆漂白过程，完成浸渍、蒸煮、漂白、磨解、洗涤等工序。

4.2水、电、汽消耗较传统制浆生产线大幅度降低。

4.3、磨浆、制浆浓度为25-40%。制化机浆吨浆耗水10-14立方米，为传统用水量10%左右。电能消耗可较传统生产降低20-50%。制浆和磨浆过程中由于浆料磨擦产生大量热，可满足蒸解或漂白所需温度，因此制浆过程可不加蒸汽或少加蒸汽。