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我公司在1998年曾对Φ2.5m×40m立筒预热器窑进行热端扩径改造,被换下的18m旧筒体在一期改造时用作单冷机前端的扩径。二期技改时更换了Φ2.8m×28m单冷机,再度被换下来的旧筒体于2000年5月改制成了Φ2.5m×20m立式烘干机。1立式烘干机结构Φ2.5m×18m旧窑筒体和原Φ2m×2m单冷机旧筒体一并拆除其传动齿轮和轮带,用于制作立式烘干机的壳体,机内砌筑隔热耐火材料,分8层设有筛网型漏斗,其中2层漏斗分别外接2个电磁振动激振器,顶部一侧设置进料口,物料经提升进入机内,然后层层冲击分散落下。底… 相似文献
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一、氨分离器的结构和使用情况我厂6万吨/年合成氨装置氨分离器原设计结构为:筒体内径φ=800毫米,总高H=3450毫米,设备上下部及上头盖为锻件,筒体为多层卷焊而成。内件为旋风分离器,内筒底部有两块垂直的高度550毫米的防涡流板。由于原设计氨分离器内件旋风分离器的旋风分离道筋与外筒内壁之间的间隙仅有1毫米,阻力较大,影响液面计的正确指示(如图1)。又分离器罩内原设计有200毫米高度的不锈钢丝除沫层,在安装时没有装上去,当入合成塔气量在50000标米~3/时以下时,分离器液位保 相似文献
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针对吊装时未充分考虑设备本体强度的大型立式容器,设计人员经常采用现场加设轴耳的方式来满足吊装要求.本文利用有限元软件ANSYS对轴耳及筒体进行建模、网格划分、加载、求解、后处理等过程,并分别对卧式吊装和立式吊装工况下的轴耳及周围简体受力情况进行重点分析和强度校核,结果表明:轴耳均满足卧式吊装和立式吊装工况下的安全要求. 相似文献
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2.连续化偶合装置(1)具有立式园筒反应器的连续偶合装置赫斯特公司发明的具有立式园筒偶合反应器的连续化偶合装置,可制得质量优良的偶氮染料、颜料。偶合组份由反应器底部成垂直层状流动进入,重氮液通过反应器壁上几个入口加入。反应终点用电位测定法自动控制。装置见图9。装置工作说明:把带有搅拌器的容器1中的偶合组份悬浮液,用泵2连续输送到带有夹套的立式园筒偶 相似文献
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对不同类型炭材烘干窑的生产能力和炭材破损率进行了比较,并对采用立式烘干窑替代卧式单筒及三筒烘干窑进行了经济技术分析。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
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利用组件技术开发化工原理实验课件,给出了系统层、组件库层和应用层的架构划分。重点讨论了组件库的设计,给出了流体阻力这一典型实验的实现描述。实践证实,基于组件技术可以提高仿真实验的开发效率。 相似文献