苛化

A two-step method of causticization and precipitation technology was used to revive spent caustic of ethylene cracking, and various conditions which affect regeneration efficiency of the reaction were studied.

采用苛化及化学沉淀两步工艺对乙烯裂解废碱液的再生进行了研究，考察了影响再生效果的各种条件因素。

The process waste of making PVC- carbide slag ,its main composition is Ca 2,can replaces the lime for causticization on the theoretics.

生产聚氯乙烯的厂家有大量废弃物——电石渣，其主要成分为Ca2，将电石渣用于碱回收苛化，试验，结果表明是完全可行的。

The caustic was regenerated from the spent caustic in an ethylene plant which adopted precipitation with a oxide of transition metal and causticization.

采用过渡金属氧化物沉淀法和苛化法处理乙烯裂解废碱液得到再生碱液，考察了再生碱液循环使用的可行性。

When the causticization time was longer than 120min and higher than 80℃ with 1.1:1 of stoichiometric ratio, and the precipitation was longer than 30min at 80℃ with n:n(Na2S) being 1.45:1, the NaOH concentration after reviving was denser than 8%, and the revived caustic approximately had the same physical property and adsorption of CO2 as the new caustic.

结果表明：苛化反应温度大于80℃，反应时间超过120 min，n：n(Na2CO3)为1.1：1， CuO沉淀反应温度为80℃，反应时间30 min，n：n(Na2S)为1.45：1等条件下，再生后的NaOH含量可在8%以上，并且再生碱液的物性以及再生碱液对CO2吸收速率上与新鲜碱基本相同。

Also having an automatic titration from the first causticizer a real feedback can be obtained more frequently than with manual lab.

自动滴定最初苛化剂，测试频率将比人工实验室更高，同时避免人工实验室可能产生的人为错误，准确，频繁地校准计算苛化模型。

Typical sample points are green liquor before the slaker, the first causticizer and white liquor before the white liquor tank.

使用苛性化装置专用的自动滴定仪，分析NaOH， Na2CO3， TTA，硫化度及苛化效率。

The AutoLime green liquor distribution control fine tunes and maintains the slaker's contents at the highest temperature possible without boiling while maintaining the distribution flow into the first causticizer/classifier section as large as possible.

在还未沸腾的最高温度下，由 AutoLime 绿液分布控制功能保持石灰消和器内物质含量恒定，同时保证流入最初苛化剂/分类器内的流量尽可能最大。

The new concept of slaking factor combined by the thickness,temperature, flow rate of green liquor; and the slaker temperature,and number of CaO is presanted, and the closed control is realized with slaking factor as main parameter.

提出了将绿液的浓度、温度、流量以及消化器温度和理论上所需氧化钙量5个参数综合成为一个参数——消化因子的新概念，并以消化因子为被控量进行闭环控制；建立了过量灰与消化因子等参数关系的推断数学模型；克服了120min大纯延迟时间的影响；实现了过量灰最佳值控制和苛化过程参数优化。

5 Green liquor TTA control 绿液 TTA 控制 The green liquor density pumped to the slaker must be stabilized as much as possible enabling steady causticizing reaction.

石灰消和器内的绿液密度必须尽可能稳定，保证苛化反应的稳定进行。

The processing of alkaline process papermaking black liquor is still primarily by alkali recycling , and its waste liquid treatment causes to produce massive waste white mud which pollutes the environment.

本文对碱法草浆苛化白泥主要成分含量进行了分析，并根据白泥主要成份为碳酸钙这一特点，对白泥在精制碳酸钙和烟气脱硫两方面的应用进行了论述和探讨。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。