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. 14 .

World Pulp and Paper Vol. 27, No. 1

快捷地将湿部添加剂注入造纸工艺过程

Flash Mixing, Fast and Simple Way to Introduce Wet End Additives Effi ciently into Papermaking Process

尤尼马杜拉（Jouni Matula）

温德造纸湿部技术公司

（Wetend Technologies Ltd; Savonlinna, Finland）

[Abstract]

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 fi ller into stock very close to the
headbox.The developed versatile mixing technology that exploits effi cient
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 fi ller
retention can be better and sheet properties develop positively.

Wet end additives are a very important group of raw materials.

They can be various chemicals , fillers 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 min away from

slice. Sometimes starch, filler, ASA, AKD, dry and wet strength

agents, fixing agent, rosin, dye, NaOH etc can be added into the

process in this location as well. Suction connection of mixing pump is

about 15~30 s from headbox. This location is commonly used to inject

the same additives like dye, defoaming agent, starch, fi ller, bentonite

even polymer, NaOH, sizing agent, strength agent etc. Normal

additives inserted before the headbox feed pump are filler, sizing

agent and retention aid polymer. The retention aid polymer/starch

and flocculants or nano-particle are often added before the screen.

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. 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 takes place the

additive makes it way towards headbox. This kind of slow blending

and macro-mixing happens randomly in chests, pumps, deaeration

receiver, screen, piping elbows and process loops etc.
1　Circulating loops of PM Approach / short circulation process

If the dosage location has a long distance to the headbox, it

generates some significant disadvantages.The long delay time keeps

the chemical extended time together with stock components, it

meets randomly disturbing colloidal material, entrained gas bubbles

and liquids/additives circulating or injected into the process with

摘要:

“创捷”瞬间混合工艺使造纸添加剂如助留剂、

施胶剂迅速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，可将各种添加剂同时混合进入流浆箱浆并同时同

地加入助留剂。结果使工艺简单、响应非常快，可降

低化学品消耗、改善填料留着率及纸张特性。

湿部化学品是造纸原材料中的重要组成部分，它

们可能是各种化学品、填料或荧光颜料。在当今的高
效率造纸工艺中离开造纸添加剂不可能生产出高档的
纸和纸板。传统方式是将化学品加在流程的不同部位，
如混合池、纸机抄前池 ( 流浆箱前 10 ～ 30 min)，有
时淀粉、填料，ASA、AKD，干、湿增强剂，固着剂、
松香、染料，烧碱等都在这个位置加入。冲浆泵（除
渣器泵）进口 ( 流浆箱唇板前 15 ～ 30 s)，通常是染料、
消泡剂、淀粉、填料、澎润土、聚合物、烧碱、施胶剂、
增强剂等的加入位置。通常在上浆泵（压力筛喂料泵）
之前加入的化学添加剂有填料、施胶剂及助留剂。助
留剂聚合物 / 淀粉以及凝聚剂或微颗粒助剂通常在压
力筛之前加入，压力筛后的良好混合是生产高质量纸
张的基础。有时仅有微颗粒和澎润土在流程的这个部
位加入。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，事实上真正的混合发生在添加剂到达流浆箱
的路上。这种缓慢而微弱的混合在浆池、泵、除气器、
压力筛、管路弯头以及工艺回路中无处不在。

　上浆系统循环回路/短循环工艺

如计量点远离流浆箱将产生重大缺陷，较长的延

时导致化学品在浆料化合物中滞留，遇上随机混合的
胶体材料，产生气泡和液体循环或以不同的 pH 值、