11.2 纸浆流送系统的相关操作单元及设备在线视频

同学们好
Hello everyone

现在我们学习
Now let’s study

第二节
Section 2

纸浆流送系统的相关操作单元及设备
Related Operation Units and Equipment of Pulp Flow System

首先我们学习操作单元1
First of all, let’s learn operation unit 1

配浆设备
Proportioning equipment

高速纸机上采用连续配浆系统
The continuous proportioning system, which is composed of

由若干组并联的
a series of parallel tubeline systems with instrument control

带有仪表控制的管路系统组成
including flow meter, control valve and metering pump and so on

包括流量计、控制阀和计量泵等
is used on the high-speed paper machinery

全系统采用计算机控制
The whole system is controlled by computer

纸浆稀释装置
Pulp dilution device

混合箱
Mixing box

多用于圆网造纸机
mostly used for cylinder machine

和低速窄幅的长网造纸机
and fourdrinier with low speed and narrow width

如图所示
As shown in the picture

纸浆和白水分别被
the pulp and white water are pumped

泵送到混合箱的相应格内
to the corresponding compartment of the mixing box respectively

通过调节各自阀门的开口面积
the quantity of the pulp and white water

控制浆料量和白水量
are controlled by adjusting the opening area of each valve

以调节纸浆的浓度
Therefore, the concentration of pulp can be regulated

冲浆池
Pulp flushing trough

分为机外冲浆池
It is divided into out-machine pulp flushing trough

和机内冲浆池
and in-machine pulp flushing trough

机外冲浆池
Out-machine pulp flushing trough

中小型长网造纸机和圆网造纸机
Small and medium-sized fourdrinier and cylinder machine

机内冲浆池
In-machine pulp flushing trough

产量较高的双层布置的
medium and large-sized paper machinery

中大型纸机
with high output and double-layer layout

对于上述的两种稀释装置
For the two dilution devices mentioned above

必须满足下面的具体要求
the following specific requirements must be satisfied

1）避免空气混入纸浆中
1) avoid mixing air into pulp

2）定量阀的安装位置合适
2) the installation position of the quantitative valve should be suitable

3）合适调节箱内的纸浆深度值
3) adjust the pulp depth value in the box reasonably

4）具有合适的浆管流速
4) with suitable pulp tube flow rate

5）集水槽的合理设计
5) the reasonable design of the water collecting trough

例如，如图
For example, in the case of

集水槽设计一例
the design of water collecting trough as shown in the picture

在设计的时候
a certain distance between the replenishment tube

考虑了将补充水管和浓浆管
the concentrated pulp tube and the connection tube

与联管之间设计了一定距离
is left when it is designed

以便空气在进入
so that air can escape upward before

冲浆泵的联管前向上逸出
entering the connection tube of the flushing pump

纸浆的净化与筛选
Purification and Screening of Pulp

对纸浆的精选包括纸浆的净化和筛选
The selection of pulp includes the purification and screening of pulp

净化设备包括
and the purification equipment includes

涡旋除渣器和锥形除渣器
vortex cleaner and centricleaner

纸浆筛选设备包括
Pulp screening equipment includes

外流型振鼓圆筛和旋翼筛
out-flow vibrating drum round screen and centri-sorter

纸浆除气装置
Pulp degassing device

纸浆中空气
The content of air in pulp

包括游离态和结合态
including free state and bound state

含量很少
is very small

大约为0.4-6%
about 0.4-6%

但对抄纸过程中的各个环节影响很大
but it has great impact on every part of the paper-making process

特别是游离态的空气
especially the free air has the greatest impact

对抄纸过程影响最大
on the paper-making process

所以需要配置除气装置
Therefore, a degassing device is required

对于低速造纸机
For low-speed paper machinery

可以用涡旋除渣器
Vortex cleaner can be used

作为纸浆的脱气设备
as the degassing equipment for pulp

如图所示
as shown in the picture

在底部装有一根直通管子
there is a straight tube at the bottom

作为中央气柱的抽气管
which can be used as the suction tube for the central air column

可将气柱中的空气抽出
and the air in the air column can be drawn out

对于中高速造纸机
For medium and high speed paper machinery

采用“飞翼” 式除气器
“flying wing” type degasser is used

如图所示
as shown in the picture

将经过净化筛选的良浆
the accepted pulp through purification and selection

通过真空实现压差的作用
is degassed through vacuum

从而达到除气的目的
to realize the pressure difference

脉冲衰减器
Pulse attenuator

为了防止进入流浆箱的浆流
In order to prevent the flow into the flow box

带有压力或速度脉冲
carrying pressure or speed pulse

在高速造纸机中的流送系统
the pulse in the flow in the flow system

必须消除浆流中的脉冲
of the high-speed paper machinery must be eliminated

所以使用脉冲衰减器
so the pulse attenuator is used

脉冲衰减器可分为
Pulse attenuator can be divided into

接触式和非接触式
contact type and non-contact type

接触式脉冲衰减器
Contact type pulse attenuator

浆流表面直接与气垫接触
the pulp surface is in direct contact with the air cushion

利用气垫弹性抑制脉冲
and the air cushion elasticity is used to suppress the pulse

如图为接触式脉冲衰减器
the contact type pulse attenuator is as shown in the picture

非接触式脉冲衰减器
Non-contact type pulse attenuator

浆流和气垫间有膜片相隔
there is a diaphragm between the pulp and the air cushion

利用膜片及气垫的弹性来抑制脉冲
The elasticity of diaphragm and air cushion is used to suppress the pulse

如图就是非接触式脉冲衰减器
the non-contact type pulse attenuator is as shown in the picture

冲浆泵和流量调节阀
Pulp flushing pumps and flow control valves

冲浆泵
Pulp flushing pump

专用于向造纸机流浆箱
It is specially used to transport pulp

输送浓度很低纸浆
with low concentration to the flow box of paper machinery

一般浓度≦1%
concentration is commonly≦1%

是一种离心式浆泵
It is a kind of centrifugal pulp pump

一般为双吸式离心泵
and is generally the double-suction centrifugal pump

可使纸浆均匀搅拌
The pulp can be stirred evenly

流速不低于3-4.5m/s
at a velocity of not less than 3-4.5 m/s

浆量调节阀
NPulp quantity regulating valve

它是装设在造纸机流浆箱
It is the main valve installed in front of the main inlet tube

进浆总管前的主要阀门
of the flow box of the paper machinery

调节经过配浆、筛选、除气的纸浆流量
It regulates the pulp flow after mixing, screening and degassing

还调节送到造纸机流浆箱的纸浆流量
as well as pulp flow sent to the flow box of the paper machinery

包括电控、气动和液动的阀门
It includes electrically controlled, pneumatic and hydraulic valves

以及球形阀和葱头阀等
as well as globe valves and onion valves

这就是本节的内容，谢谢同学们
So much for this lesson. Thank you all