本体法PVC预聚釜和聚合釜的研制

概述了国内引进的本体法PVC 30 m~3预聚釜和50 m~3聚合釜的结构和特性。介绍了国产本体法PVC 42 m~3预聚釜和70 m~3聚合釜的放大研制过程及技术特点,指出该型釜在应用几何相似原则进行尺寸放大的同时须匹配提升聚合釜传热能力。国产本体法PVC 42 m~3预聚釜和70 m~3聚合釜的研制成功提高了我国聚合釜的技术水平,将对我国PVC行业产生重大影响。     

HPVC在105m~3聚合釜上的探索生产

通过7 m~3聚合釜系统小试及14 m~3聚合釜系统中试的探索研究,优化了产品配方,采用低温聚合+扩链剂法实现了HPVC在105 m~3聚合釜上的工业化生产。     

在5m~3聚合釜中试生产稀土异戊光刻原胶

采用5m~3聚合釜进行稀土催化体系合成异戊光刻原胶的试生产。试生产结果验证了中试成果。双螺带锚式搅拌器结构的聚合釜适用于稀土异戊光刻原胶的工业化生产。借聚合反应热可提高聚合反应温度,这样既降低能耗又缩短了聚合反应时间,并提高聚合釜的生产能力。聚合釜的容积比中试聚合釜放大9倍,无明显的放大效应,且可使聚合反应操作更富于弹性。工业试生产的光刻原胶质量符合部合同要求。     

小型聚合釜涂釜系统的改进

<正>陕西北元化工集团有限公司化工分公司聚氯乙烯二分厂(以下简称北元化工)10万t/a PVC生产装置采用悬浮法聚合工艺,分2条生产线(简称第1期、第2期),其中第1期聚合釜为吉化集团机械有限责任公司生产的45 m~3聚合釜,第2期聚合釜为锦西化工机械(集团)有限公司生产的48m~3聚合釜,目前生产SG3型通用PVC树脂,清釜周期为30釜,粘釜料每釜225 kg左右,清釜周期偏短,釜利用率低,能     

水泥专用丁苯胶乳的工业放大试验

研究了水泥专用丁苯胶乳从2m3中试聚合釜到20m3工业规模聚合釜的放大过程。结果表明:采用单位体积功率与搅拌桨的叶端剪切速率相结合的放大准则,能够在20m3工业聚合釜重现2m3中试聚合釜的反应结果。以38→48→40r/min变搅拌转速的操作方式可以制得平均粒径为110~120nm、粒径分布指数为0·050~0·065和化学稳定性及机械稳定性优异的水泥专用丁苯胶乳。     

80m~3氯乙烯聚合釜放大技术

一、前言 国产氯乙烯聚合釜的发展大致可以分为三个阶段: 第一阶段:1958～1974,主要采用13.5m~3瘦长型聚合釜(高径比3.25)。 第二阶段:1974～1976,制造了30m~3中型聚合釜。在该釜运转过程中,系统地测定了传热系数,研究了聚合釜的传热性能,并探索了氯乙烯聚合宏观动力学。30m~3已     

80m~3聚合釜树脂质量检测和评价

一、概述 国产第一台80m~3氯乙烯聚合釜试生产成功,取得了预期效果,共投产50釜,1100吨,成品质量100％符合部颁标准(见表1)。     

锂系聚丁二烯橡胶间歇聚合反应釜工程研究

本文以过程研究为基础,介绍了锂系丁二烯聚合反应的工程特征;研究了锂系丁二烯腔液的流变行为;确定非等温间歇操作方式;以中试试验得到的参数为基础,同时结合数学模型,对放大后的聚合反应釜进行分析和质量指标预测;从过程实际出发,将化学因素与工艺、工程因素早期结合探讨聚合釜的放大规律;提高开发放大水平,为3000t/a低顺式聚丁二烯橡胶生产装置基础设计13m~3釜的放大提供了依据。     

超低聚合度PVC树脂的研发与生产

以α-巯基乙醇为链转移剂,在50 L聚合釜试验生产超低聚合度PVC树脂。考察了链转移剂、分散剂、引发剂的用量及配比对聚合反应及产品性能的影响,并在14 m~3聚合釜上进行了中试生产。     

森松集团(中国)

正Morimatsu Pioneering Technology森松技术先锋品质根据客户生产工艺优化放大生产设备,为客户提供产品放大、节能降耗、高效增值的解决方案。在PVC行业,已形成24m~3、48m~3、70m~3、105m~3、136m~3、150m~3等系列化高效聚合釜,单釜产能显著提高,能耗显著下降。森松始终秉承低碳可持续发展战略,在PTA、醋酸、多晶硅、已二酸等行业,森松的优化放大解决方案能为众多客户带来可观的增值效应。     

135 m3与70 m3聚合釜生产PVC的技术经济分析

通过对135 m3与70 m3聚合釜生产PVC的技术经济分析对比,指出135 m3聚合釜适合PVC生产能力高于20万t/a的生产装置,70 m3聚合釜适合PVC生产能力在20万t/a以下的生产装置。     

挡板对搅拌特性影响的研究

在内径为400mm的试验釜内,测定了不同挡板条件下的搅拌功率消耗、混合时间、固体回转部半径及桨叶的排出次数等,研究了挡板对搅拌体系的动力特性、混合特性和循环特性的影响,并提出相应的关联式,为搅拌装置的设计和改造提供依据.     

不同聚合釜生产羧基丁苯胶乳的探讨

考察了１２．７ｍ＾３和１５．０ｍ＾３聚合釜在生产羧基丁苯胶中搅拌功率、搅拌级别、桨叶端速和传热能力以对聚合温度及产品质量的影响。结果表明，在传热能力强，搅拌级别适中的情况下，聚合温度容易控制，产品质量好，转化率较镐，能耗和物耗较低。     

工业聚合反应装置：Ⅳ.乳液聚合反应器（下）

讨论了釜式乳液聚合反应器搅拌桨的选择原则及其搅拌特性和乳液聚合反应器的放大准则，聚合过程的控制及其优化。     

有无静态混合器时的机械搅拌气升式环流反应器传递特性研究

The mechanically stirred internal loop airlift reactors equipped with or without static mixers are devised for intensification of gas-liquid mass transfer rate. The influences of superficial gas velocity, agitation or static mixers on gas hold-up, mixing time, liquid circulating velocity and volumetric mass transfer coefficient have been investigated with tap water and carboxymethyl cellulose (CMC) aqueous solution. The experimental results indicate that mechanical agitation is more efficacious than static mixer in highly viscous media for improving mass transfer in airlift reactors. The empirical correlation of volumetric mass transfer coefficient with apparent viscosity, and energy consumption for mechanical agitation and aeration is developed.     

生物法同步脱除SO_2和NO的实验研究

生物滴滤工艺常被用来净化可被生物降解的污染气体。在一个生物滴滤塔中进行硫酸盐还原菌(SRB)、脱氮硫杆菌(TD)和异养反硝化菌3种优势菌的混菌填料挂膜,驯化成熟后处理含SO2和NO的模拟工业废气。实验表明:维持喷淋液pH值为7—8,S2O32-质量浓度为3 g/L左右,喷淋密度为18 m3/(m2.h),SO2进气质量浓度为200—5 000 mg/m3,NO进气质量浓度为20—500 mg/m3时,SO2气体平均去除率为97.6%,NO气体平均去除率为51.4%。     

Removal of Pb(II) from aqueous solutions by using clinoptilolite and bentonite as adsorbents

In the present study, the ability of natural zeolite clinoptilolite and bentonite (clay) to remove Pb(II) from aqueous solutions has been investigated in batch reactors with a maximum contact time of 120 min. Adsorption tests of Pb(II) were carried out using a solution concentration of 1,036 ppm at initial pH = 4, and solid to liquid ratio of 2 g/100 mL. The effects of agitation speed (0, 100, 200, 500 rpm), temperature (28°C, 45°C, 60°C) and particle size (2.5–5.0 mm, dust) of the minerals were examined. The effect of acidity of the aqueous solution was also examined. Bentonite was found to be more effective for the removal of Pb(II) than clinoptilolite, under the experimental conditions used. The removal of Pb(II) using bentonite reached 100% at ambient temperature and mild agitation (100 rpm), while it was approximately 90% at 60°C without agitation. On the other hand, the highest removal level reached by clinoptilolite was 55%. Clinoptilolite dust is found to be more efficient than granular clinoptilolite. Agitation and temperature affected the uptake of Pb(II), especially in the case of granular clinoptilolite (2.5–5.0 mm). Finally, it can be seen that acidity of the aqueous solution influences the removal of lead by the minerals. The adsorption of lead increases with an increase in pH of the solution from 1 to 4.     

正交设计优选湿法磷酸萃取搅拌桨

为改进湿法磷酸净化中桨式搅拌器,在水/磷酸/TBP+煤油体系中,采用正交实验设计探讨了4种搅拌器的萃取效果和功率消耗。结果表明,影响磷酸萃取率的因素由主到次为:搅拌器类型、反应时间、搅拌转速、相比、桨槽比;影响单位体积功率消耗的因素由主到次为:搅拌器类型、桨槽比、搅拌转速、相比、反应时间。通过综合平衡法获得的优化方案为:大三角搅拌桨,桨槽比1∶3,搅拌转速300 r/min,相比为4∶1,反应时间为8 min。在此条件下,磷酸萃取率为41.21%,单位体积功耗为0.26 kW/m3。     

Effects of geometrical and physical factors on light particles dispersion by agitation characteristic curve

In this study, the effects of geometrical and physical factors on light particles dispersion in stirred tank were investigated by agitation characteristic curve. The experiments and CFD simulations with discrete phase model (DPM) and volume of fluid model (VOF) were conducted in this paper. Five factors, which include four geometrical factors (submergence, impeller-to-tank ratio, number of impeller blades and baffling mode) and a physical factor (liquid viscosity) were considered. For each factor, the power consumption curve and agitation characteristic curve were drawn to compare the power consumption and mixing results in the stirred tank. Characteristics of the agitation characteristic curves were compared with the previous published literatures and theories. It is found that the agitation characteristic curves reflect the tendency of power consumption and particles distribution well in stirred tank. The good agreement indicates the applicability of the agitation characteristic curves for the study of light particles distribution in stirred tank.     

搅拌转速对悬浮PVC树脂平均粒径的影响

在5L小釜中分别采用恒转速和变转速工艺进行氯乙烯(VC)悬浮聚合,考察粒径随转化率的变化规律,发现两者规律相似,即在低转化率时粒径随转化率的增加而逐渐增大,当转化率约为15%以后粒径几乎不再变化.同时发现搅拌转速、分散剂用量和聚合温度等对上述转化率～粒径变化规律几无影响,只是粒径大小的不同.将变转速工艺应用于大型釜生产中,考察变速时间、前转速及后转速对最终树脂粒径及其分布的影响,计算两工艺的生产能耗,发现变转速聚合除了有利于树脂颗粒的形成外,还可以降低搅拌功率的消耗,节约能源.