9.4.2 盘磨机（下）在线视频

同学们好
Hello everyone

这一讲我们将继续学习
today we will continue to learn

盘磨机的相关知识
the disc pulper

在盘磨机的设计和选用中
In the design and selection of the disc pulper

磨盘的磨纹形状以及分布
the shape and distribution of disk grinding pattern

磨纹的材质
the material of grinding pattern

磨盘的直径和转速
the diameter and speed of the disc

磨盘的间隙和压力调节机构
the gap and pressure adjustment mechanism of the disk

盘磨机的动力消耗等
the disc pulper power consumption

是要考虑的主要问题
are the main issues to be considered

磨片的基本齿形分
The basic tooth profile of the disk is divided into two types

疏解型和帚化型两种
namely, defibering and fibrillation

通常正锯齿和斜锯齿形的磨纹
Usually the regular and oblique teeth

用来疏解纸浆
are used for the pulp defibering

平齿形和圆齿形的磨纹
flat and circular teeth

可以用来帚化纸浆纤维
can be used for the pulp fiber fibrillation

盘磨机上磨盘的磨纹选择
The choice of grinding pattern of disc

关系到盘磨机能否正常操作
is related to if the disc pulper operates normally

和达到预期打浆效果的问题
and achieving the expected beating effect

例如打浆浓度较高的纸浆
With the high consistency pulp

磨纹宜采用窄的刀纹和浅的沟槽
narrow knife grain and shallow groove should be used

以便减少纸浆在沟槽中沉积与堵塞现象
so as to reduce the deposition and blocking phenomenon of pulp in the groove

有助于纸浆的运动
and help the movement of pulp

当纸浆已经大多数
When most of the pulp

成为单根纤维的状态时
has become a single fiber state

要进一步打浆以提高打浆度
in order to further beating to improve freeness

满足纸张强度的要求
and meet the requirements of paper strength

则磨纹的沟槽必须窄而浅
the groove of grinding grain must be narrow and shallow

沟槽窄增加磨碎面积
The narrow groove increases the grinding area

沟槽浅有利于沟槽内的纸浆
and the shallow groove facilitates the pulp in the groove

进入磨纹表面
to enter the grinding surface

磨纹表面保持有足够的纸浆
and the grinding surface maintains enough pulp

可获得充分的打浆机会
which can obtain sufficient beating

而当较粗的纸浆在通过盘磨机磨盘
When the coarse pulp needs to be grinded

需要由粗到细的疏解和精磨的过程时
from course to fine through the disc pulper

则可在同一个磨盘面上
different grinding patterns can be designed

分段设计出不同的磨纹
on the same disc surface in sections

用金属的磨纹疏解纸浆时
When using metal grinding grain to disfiber pulp

一般选用锯齿形磨纹
sawtooth grinding grain is generally selected

要求帚化时
when fibrillation is required

一般选用平齿形或圆齿形的磨纹
flat tooth or round tooth is generally selected

为使纸浆不致在齿纹之间直通出去
In order to prevent the pulp from leaking between the teeth

在磨片上设有挡浆坝
a pulp dam is arranged on the grinding disc

称为挡坝或者是封闭圈
which is called a retaining dam or a sealing ring

在盘磨机的工作过程中
In the working process of the disc pulper

由于磨盘圆周运动所产生的离心力
the centrifugal force produced by the circular motion of the disc

有使纸浆从沟槽中“泵出”的作用
has the function of "pumping" the pulp out of the groove

当磨纹转动方向
When the rotation direction of the grinding pattern

与磨纹的倾斜方向相同时
is the same as the inclination direction of that

磨纹对纸浆起着“拉入”作用
the grinding pattern play a "pull-in" role to the pulp

导致纸浆在盘面间停留的时间增加
which leads to the increase of the time that the pulp stays on the disc

而当磨纹的转向
and when the rotation direction of the grinding pattern

与倾斜方向相反
is opposite to the inclination direction

则起着“泵出”作用
it plays a "pump-out" role

纸浆在盘面上停留时间较短
and the pulp stays shorter time on the disc

前者有利于纸浆质量的提高
The former is benefit to the improvement of pulp quality

产量较低
but with lower yield

后者有利于产量的增加
while the latter is benefit to the increase of yield

质量降低
but with quality decrease

倾斜角度的大小当然影响着
The angle of inclination certainly affects

打浆产量和质量的增减
the increase and decrease of the pulp yield and quality

挡坝在一定程度上就起着调节作用
The dam plays a regulative role in certain degree

图中显示的就是几种磨盘上挡坝示意图
The figure shows the schematic diagram of the dam on several grinding disc

这是一些磨盘磨片的磨纹
Here are some grinding disk patterns

大家可以看看，感受一下
You can experience them

浆料在进浆压力下
Under the feeding pressure

从盘磨机中心先进入
the pulp enters the tooth groove in the rotary disk

转动磨盘内部分的齿槽中
from the center of the disc pulper

成放射状向圆周运动
and moves radially to the circle

当碰到封闭圈或挡坝的阻挡后
when encountered with the closure ring or dam blocking

一部分浆料被迫通过两磨盘的间隙
part of the pulp is forced to pass through the gap between the two grinding discs

在齿面上形成浆膜
and form a film on the tooth surface

同时受到齿刃剪切作用
at the same time by the cutting action of the tooth blade

和齿面的研磨作用
and the grinding of the tooth surface

纤维间也相互摩擦
the fiber also rub each other

大部分浆料被旋转的动盘带动
Most of the pulp is driven by the rotating disk

以高速进入到定盘的齿槽中
enters tooth groove of the fixed disk

呈湍流式翻滚
with high-speed and rolls in a turbulent manner

并沿齿槽向外流动
and flows along the tooth groove

继而又受到定盘封闭圈或挡坝的阻挡
and then is blocked by the fixed disc's closed ring or dam

再被抛向动盘齿槽
thrown into the rotary disc's tooth groove

浆料在两磨盘间多次转移运动中
During the multiple movements between the two disks

纤维受到各种力的作用
the fiber is affected by various forces

包括扭曲力、剪切力、摩擦力
including twisting force, shearing force, friction force

揉搓力、水力冲击力
kneading force and hydraulic impact force

使纤维受到撕裂、切断
which makes the fiber be torn, cut

压溃、扭曲、分丝帚化
crush, twisted and fibrillation

从而完成打浆作用
thus complete the beating

最后从盘磨机出浆口排出
and the pulp is discharged from the outlet of the pulper

磨纹的倾向、梯度
Grinding tendency, gradient

以及磨区分为破碎区
and the division of grinding into crushing area,

粗磨区和精磨区
rough grinding area and fine grinding area

都是设计磨片和磨盘需要考虑的问题
these are the issues need to be considered in designing the grinding disk

还有磨盘的材料、磨盘间隙的调节方式
as well as material grinding disc, the adjustment method of grinding disc gap

这些影响因素规律
these factors are similar to

与高得率制浆的磨浆机类似
high-yield pulper

在此不再赘述，课本有比较详细的论述
there is a more detailed discussion in the textbook

大家感兴趣可以自己看
you can read on your own if you are interested

下面我们一起看看
Let's take a look at the factors

影响盘磨机打浆效能的因素
that affect the pulping efficiency of the disc pulper

首先来看打浆浓度对打浆的影响
First of all, let’s look at the effect of pulp concentration on pulping

打浆浓度高
With high pulp consistency

进入磨齿间的纤维层加厚
the fiber layer between the grinding teeth is thickened

纤维所承受的压力降低
the pressure of the fiber is reduced

大部分纤维可以避免受到切断
most of the fiber can avoid being cut

同时纤维受到强烈的揉搓和压挤作用
and the fiber is strongly kneaded and extruded

打浆浓度低
With low pulp consistency

磨齿间的纤维量少
the amount of fiber between the grinding teeth is less

纤维受的压力大
and the pressure of the fiber is high

有利于纤维的切断作用
which is beneficial to the cutting of the fiber

在一定条件下
Under certain conditions

适当的提高浆料浓度
the proper increase of pulp consistency

可以提高打浆产品的质量和产量
can improve the pulp quality and output

降低电耗
and save the power consumption

但盘磨机往往受到
However, the disc pulper is often limited

供浆系统及自身结构的限制
by the pulp supply system and its own structure

浓度不能过高
and the consistency cannot be too high

一般在4.0～4.5％
generally 4.0-4.5%

对于长纤维浆料
For the long fiber pulp

为了增加切断能力
in order to increase the cutting ability

浆料浓度需降低到3.0～3.5％
the pulp consistency should be reduced to 3.0-3.5%

在打浆过程中
During the beating process

要保持浆料浓度稳定
it is necessary to keep the consistency of the size stable

以提高浆料的质量
to improve the quality of the pulp

接下来我们看看浆料通过量
Next let’s look at the influence

对打浆质量的影响
of the throughput of pulp on the quality of beating

在浆料浓度和磨浆负荷不变的条件下
Under the condition of the same pulp consistency and grinding load

浆料通过量和打浆质量有密切的关系
the throughput of pulp is closely related to the beating quality

增加通过量
With the increase of the throughput

每根纤维在磨盘中停留的时间缩短
the time that each fiber staying in the pulper is shortened

受到的打浆作用小
the effect of beating is low

打浆质量下降
the quality of beating is decreased

降低通过量
With the reduction of the throughput

打浆的产量降低
the output of beating is reduced

单位电耗增加
and the power consumption per unit is increased

通过量的确定
The determination of the throughput

应当根据浆料品种
should be based on the type of pulp

纸张对浆料性质的要求
the requirements of paper on the properties of the pulp

盘磨机状况等合理选择
the condition of the disc pulper

磨浆时的电流大小
The current during pulping

间接地反映
indirectly reflects the relationship

打浆比压与磨盘间隙的关系
between the specific pressure and the gap between the disks

磨盘间隙小
The gap between disks is small

比压大
the specific pressure is large

电流值高
the current value is high

通过量少
the throughout is small

浆料受到的打浆作用大
the beating effect on the pulp is large

质量提高而产量下降
the quality is improved and the output is decreased

单位电耗增加
the unit electric consumption is increased

磨盘间隙较大时
When the gap between disks is large

浆料流量增加
the pulp flow is increased

产量提高
the output is increased

打浆作用小
and the beating effect is small

为充分发挥打浆设备的效率
In order to give full play to the efficiency of the pulping equipment

应使盘磨机在满负荷下运转
the disc pulper should operate under full load

根据主电机的功率
According to the power the main motor

定出最大允许的电流值
the maximum allowable current value is determined

在不超过规定电流负荷下
Under the condition of not exceeding the specified current load

调节磨盘的压力和浆料通过量
the pressure of the grinding disk and the pulp throughput is adjusted

找出一个经济合理的指标
to set an economic and reasonable index

用来控制生产
to control production

既能提高产量、质量
which can not only improve the output and quality

又能降低单位电耗
but also reduce the unit power consumption

盘磨机在使用过程中需要注意一些事项
Things need to pay attention to during disc pulper operation

比如,在运转中
For example, in the operation of the disc pulper

如果发现盘磨机中有异响
if there is abnormal noise

如有坚硬杂物进入盘磨机
or if there is hard debris fall into the disc pulper

或磨片碎裂等
or the grinding disk is broken, etc.

应立即停机
the machine should be shut down immediately

切勿退刀
do not withdraw the knife

如果在盘磨机转动时退刀
If the knife is withdrawn when the disc pulper is rotating

硬物会进入磨片间将磨齿打坏
the hard object will go into the grinding disk and damage the grinding teeth

必须在盘磨机停止运转后
Wait till the disc pulper stops operation

打开盘磨机清除杂物
open the disc pulper to remove debris

如果听到有金属噪音
If a metal noise is heard

则表示断浆或进刀过多
it means broken pulp or knife forward too much

引起磨片间的相互摩擦
causing friction between the pieces

这时需迅速调整电流或退刀
At this time, you need to quickly adjust the current or retreat the knife

如果换新磨片后
If the grinding disc is replaced

需先开空车
you need to run the machine with empty load

校验磨片是否完全吻合
to check whether the grinding disc is completely consistent

如果磨片不平整
If the grinding disk is not flat

或者是有震动现象
or there is vibration

需要进行水磨至完全吻合才能够使用
it needs to be grinded with water until it is completely matched

以上就是关于盘磨机的相关知识
The above is the relevant knowledge of the disc pulper

下面我们将给大家简要介绍一下
next we will give you a brief introduction

中高浓打浆设备
on the medium and high consistency beating equipment