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某厂1号窑设计生产能力为2 000 t/d生产线,回转窑规格为Φ4.0 m×60 m、三档支撑。自2001年投产以来,窑口浇注料寿命一直在5~7个月,最短不足4个月,成为制约回转窑运转周期的关键因素。后经技术人员不断摸索改进,从结构优化、耐火材料和锚固件选用、施工管控,以及工艺管理多方面采取措施,取得了较好效果。 相似文献
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Saudi Cement Company(沙特水泥公司,以下简称SCC)扩建项目为两条万吨生产线,在沙特阿拉伯王国东部省Hofuf厂区,两条生产线同时建设,堪称水泥建设史上的罕见。回转窑为中材国际南京水泥院设计,规格为φ6.2m×92m,三档支撑,斜度为4%,由中材国际唐山重型机械有限公司制作。回转窑配备双液压挡轮,分别置于回转窑的第三档和第二档, 相似文献
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近年来,5 000t/d生产线在我国得到了很大的发展,Φ4.8m×74m和Φ4.8m×72m回转窑是主要的三档窑型,其中Φ4.8m×74m窑大约有400余条。据笔者统计,有近1/4的Φ4.8m×74m窑在生产中出现了轮带和筒体开裂等问题。 相似文献
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我公司Φ4.8×72m回转窑采用三档支撑,窑尾档采用液压挡轮控制回转窑上下轴向运行.轮带套装在简体上衬以活垫板. 相似文献
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某Φ4 m×60 m回转窑2021年6月初大齿圈出现振动,Ⅰ档、Ⅱ档托轮轴承座晃动幅度加大,窑电流波动范围变宽,10月底对窑筒体中心线进行静态检测,修复了Ⅰ档、Ⅱ档非传动侧托轮表面凹坑,更换了磨损的耐火砖,开机后对焊补的托轮进行了车削和调整。采取以上措施后大齿圈振动消失,Ⅰ档、Ⅱ档托轮轴承座无晃动,回转窑运行平稳,取得了预期的效果。 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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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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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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A refined nonlinear value of the main parameter of a material, i.e., the elongation modulus versus the instant temperature value, was suggested for introduction into the computational algorithm of tempering stresses. 相似文献
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