11.4 流浆箱的布浆器在线视频

同学们好，现在我们学习
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第四节 流浆箱的布浆器
Section 4 Pulp distributor of flow box

布浆器的作用
The role of the pulp distributor

展开浆流
to expand the pulp flow

匀布浆流
distribute the pulp flow uniformly

对布浆器提出的要求是
The requirements for the pulp distributor are as follows

进浆总管是等压管
the main feeding tube is an isobaric tube

具体表现在以下几个方面
which is shown in the following aspects

纸浆由总管转向
The pulp must have the same pressure loss

经布浆元件各孔眼
in the process of turning from the main tube

流至流浆箱堰池的过程中
and flowing through each orifice of the pulp distribution element

各流股必须具有相同的压力损失
to the flow box weir pond

不变形、不锈蚀、尺寸精确
Non-deformation, non-corrosion, with precise size

内壁光滑不挂浆，易清洗
smooth inner wall without pulp, easy to clean

设有压力调节和控制的装置
A device with pressure regulation and control is equipped.

布浆器的分类
Classification of pulp distributor

扩展布浆器
Expand the pulp distributor

分为折叠形流道
It is divided into fold-shaped channel

直升单流道
straight-up single-flow channel

和带导流片的流道
and flow channel with deflector

适于幅宽小、车速低的纸机
It is suitable for paper machinery with small width and low speed

从图可以看出
It can be seen from the picture that

中间浆流快，两边慢
the flow of the intermediate pulp is fast and the two sides are slow

当扩展布浆器的
A deflector shall be used

扩展角大时要用导流片
when the expansion-angle of the expansion pulp distributor is large

多支管布浆器
Multi-branch tube pulp distributor

从图可以看出
As can be seen from the picture

这种布浆器的进浆管
the feeding tube of the pulp distributor

接到总管中央部位
is connected to the central part of the main tube

并由总管上接出
and many branch tubes are connected

许多支管到流浆箱
from the main tube to the flow box

这种布浆器的特点是
The pulp distributor is characterized in that

沿横幅不容易得到
the it is not easy to obtain uniform flow rate

均匀的流量和流速
and flow velocity along the horizontal scroll

其直管设计需要经过试验改进后
and the design of straight tube needs to be improved after trial

才能适用于实际的流量
before it can be applied to the actual flow rate

锥管布浆器
Cone-shaped tube pulp distributor

这种布浆器是目前应用最广泛的布浆器
This kind of pulp distributor is the most widely used one at present

从图可以看出
As shown in the picture

锥管的截面形状
the cross-sectional shape of the cone-shaped tube

可以是圆形、矩形或者弓形
can be circular, rectangular or bow-shaped

该布浆器沿着横向的
The uniform distribution of flow rate and flow velocity

流量和流速分布的均匀效果较好
along the transverse direction of the pulp distributor is better

流量适应范围相对比较宽
and the application range of flow is relatively wide

这种布浆器又分为三种主要类型
The pulp distributor is divided into three main types

支管式锥形布浆器
Branch-tube type cone-shaped pulp distributor

图为支管式
The picture shows the shape

锥形布浆器外形
of the branch-tube type cone-shaped pulp distributor

具有一列直径较小
which has a row of tightly arranged branch tubes

而紧密排列的支管
with smaller diameter

孔板式锥管布浆器
Orifice plate type cone-shaped tube pulp distributor

如图为
As shown in the picture

孔板式锥管布浆器
it is an orifice plate type cone-shaped tube pulp distributor

它的布浆元件
and its element for pulp distributor

通常是一个精确制造的有机玻璃孔板
is usually a precisely made organic glass orifice plate

孔板具有更换方便
which has the advantages of convenient replacement

占用位置很小
small in occupation position

加工制造较容易，清洗简便等优点
easy manufacture and easy cleaning

所以，孔板式锥管布浆器
Therefore, the orifice plate type cone-shaped tube pulp distributor

应用最多
is the most widely used

管束式锥管布浆器
Tube-bundle type cone-shaped tube pulp distributor

图为As shown in the picture

管束式锥形布浆器
it is tube-bundle type cone-shaped tube pulp distributor

布浆效能高
which has high efficiency of distributing pulp

多用在满流式流浆箱上
and is mostly used in full-flow type flow box

具有多列的支管
It has a multi-row branch tube

很厚的孔板
a very thick orifice plate

很大流阻和较低的开孔面积
a large flow resistance and a low opening area

管径为14-30mm The diameter of the tube is 14-30 mm

锥管布浆器
The main components of

的主要组成
the cone-shaped tube pulp distributor are as follows

如图所示As shown in the picture

我们可以知道锥形布浆器
we can know that the cone-shaped tube pulp distributor

主要由过渡管、锥管
is mainly composed of a transition tube

布浆元件、孔板
a cone-shaped tube, element for pulp distributor

和回流装置等组成
an orifice plate and a reflux device

其中
Wherein

过渡管的作用是
The function of the transition tube

稳定浆流
is to stabilize the pulp flow

严格遵守浆流平行于
and strictly observe the principle that the pulp flow

总管后壁进入的原则
shall enter parallel to the rear wall of the main tube

锥管的作用
The role of the cone-shaped tube

有布浆的作用
it plays the role of pulp distribution

还有小端回流的作用
and the role of small-end reflux

小端回流的作用主要是为了
the role of small-end reflux is mainly to

1）防止在锥管末端
1) prevent the dead zone or vortex

有死区或涡流
at the end of the cone-shaped tube

防止浆团和空气的聚集
prevent the aggregation of pulp lump and air

2）提供了对锥管浆流进行
2) provide the means to adjust and control the flow

调节和控制的手段
of the cone-shaped tube pulp

对锥管中浆流的静压头
to control the static pressure head and the balance of kinetic energy

和动能的平衡进行控制
of the pulp flow in the cone-shaped tube

布浆元件的作用The role of the element for pulp distribution

使纸浆沿着纸机的
distribute the pulp uniformly

横向均匀地分布
along the horizontal direction of the paper machinery

常用的元件有
Elements which are commonly used include

多管、孔板
multi-tube, orifice plate

阶梯扩散管和管束等
stepped diffusion tube and tube bundle, etc.

而多管在结构上可分为
The multi-tube can be divided into

圆形直管、异形管
round straight tube, special-shaped tube

和文丘里管
and Venturi tube in terms of structure

与多管相比
Compared with multi-tube

孔板的整流消能装置比较简单
the rectifier energy dissipation device of orifice plate is simpler

本节就讲到这里
So much for this section

谢谢同学们
Thank you all