WET

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Technologies

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Wetend Technologies Ltd, Kaartilantie 7, FIN-57230 Savonlinna, Finland Tel. +358 10 836 0100, Fax + 358 10 836 0120

www.wetend.com

e-mail:

firstname.lastname@wetend.com

Domicile/Kotipaikka: Savonlinna VAT No: FI16435711 / Y-tunnus 1643571-1

Flash Mixing, fast and simple way to introduce wet end additives
efficiently into papermaking process
瞬间混合，快捷地将湿部添加剂注入造纸工艺过程

Jouni Matula 尤尼马杜拉

Wetend Technologies Ltd; Savonlinna, Finland

温德造纸湿部技术公司，芬兰萨翁琳纳;

www.wetend.com

Abstract 摘要
An immediate and effective mixing with TrumpJet

Flash mixing process makes it possible to inject

papermaking additives e.g. retention aid and sizing chemicals and filler into stock very close to the headbox.
The developed versatile mixing technology that exploits efficient transverse mixing principle makes it possible
to mix additives in selected groups into headbox feed stock simultaneously and together with retention aid
agent at the same location. As a result the process is simpler, it has a very short response time, chemical
consumption can be lower and filler retention can be better and sheet properties develop positively.
“创捷”瞬间混合工艺使造纸添加剂如助留剂施胶剂即刻且高效地在最接近流浆箱的部位注入成为可能。
在对多样的混合技术研发中开拓了横断混合原理，使将添加剂分组同时混合进入流浆箱浆流并同时同地加入助
留剂成为可能。结果使得工艺简单，响应非常快，可降低化学品消耗改善填料留着率以及纸页优良特性

Introduction 导论
Wet end additives are a very important group of raw materials. They can be e.g. various chemicals and filler
and opacity pigments. The present efficient way of paper production and high uniform quality of paper and
board would not be possible without the additives. Traditionally additives are inserted in various locations of
the process. Blend/mixing and machine chest are located 10–30 minutes away from slice. Sometimes starch,
filler, ASA, AKD, dry and wet strength agents, fixing agent, rosin, resin, dye, NaOH, CO

etc can be added

into the process in this location as well. Suction connection of mixing pump (fan pump 1) is about 15–30
seconds from headbox. This location is commonly used to inject the same additives like dye, defoaming agent,
starch, filler, bentonite even polymer, NaOH, sizing agent, strength agent etc.
湿部化学品是造纸原材料中的重要部分。它们可能是各种化学品，填料或者荧光颜料。在当今高效率的造纸工
艺中离开了造纸添加剂是不可能生产出高档的纸张的。传统的方式是将化学品加在工艺的的不同部位。混合
池、纸机浆池超前流浆箱唇板 10-30 分钟，有时淀粉、填料，ASA、AKD，干、湿增强剂，固着剂、松香、树
脂、染料，烧碱，CO2 等都在这个位置加入。冲浆泵（除渣器泵）进口超前流浆箱唇板 15-30 秒。通常染料消
泡剂、淀粉、填料、澎润土、甚至聚合物、烧碱、施胶剂、增强剂、等在该位置加入。
Once we move forward normal additives inserted before the headbox feed pump (fan pump 2) are filler, sizing
agent and retention aid polymer. The retention aid polymer/starch and flocculants or nano-particle are often
added before the screen.
通常我们加入在上浆泵（压力筛喂料泵）之前的化学添加剂有填料，施胶剂以及助留剂。而助留剂聚合物/淀粉
以及凝聚剂或微颗粒助剂通常在压力筛之前。
After the screen good mixing is already very important and essential for good sheet quality. In some cases
only bentonite or nano-particle/silica is added in this part of the project. If mixing is good enough to produce
good formation and profiles retention aid polymer/starch can be added post-screen. 压力筛后的良好的混合是
良好的纸页质量的基础。有时仅有微颗粒和澎润土在项目的这个部位加入。
Selection of the dosage location is based on lab performance test and experience from earlier cases. Mixing
of an additive is often based in dosage into the process with low mixing intensity and the actual true mixing
into the stock takes place once the additive makes it way towards headbox of a papermachine. This kind of
slow blending and macro-mixing happens randomly in chests, pumps, deaeration receiver, screen, piping
elbows and in process loops etc. 加入位置的选择是以实验室测试结果及经验为基础的，添加剂的混合通常基于
用低能量的混合注入系统但事实上真正的混合发生在添加剂到纸机流浆箱的路上。这种缓慢而微弱物序混合在
浆池，泵，除气器，压力筛，管路弯头以及工艺回路中无处不在。