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卧式螺旋卸料离心机一种高效的离心分离设备,广泛应用于石油化工等多个行业,具有单机处理能力强、分离质量高、操作连续方便、占地面积小以及维护费用低等优点,在离心机领域一直占有特殊的地位。随着工业的发展,卧式螺旋卸料离心机日臻高参数、大型化,同时低能耗、小污染、高利用的提出使卧式螺旋卸料离心机的稳定性和可靠性面临新的挑战。本文简述了卧式螺旋卸料离心机的主要结构及工作原理,回顾了卧式螺旋卸料离心机发展历史。在此基础上总结了卧式螺旋卸料离心机在结构强度、动力学特性、减振技术、动平衡技术、流体动力学等方面的研究进展,综述了应用有限元法研究卧式螺旋卸料离心机的最新成果,最后讨论了该类离心机的研究方向和发展前景。 相似文献
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介绍了固液分离的各种设备结构并进行了对比,对选择卧式螺旋卸料沉降离心机进行盐泥分离进行试验和研究,确定了盐泥分离用卧式螺旋卸料沉降离心机结构及参数。对卧式螺旋卸料沉降离心机分离盐泥的效果进行分析,得出卧式螺旋卸料沉降离心机值得在纯碱行业推广的结论。 相似文献
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<正> 一、概述 分离机械通常是指用于分离液相非均一系统的机械。分离机械有多种产品,离心机是其中之一。近年来国外在发展离心机新品种方面,有一种业已成熟的产品,即连续操作过滤式螺旋卸料离心机(以下简称过滤式螺旋离心机)。它具有生产能力大、固相脱水程度好、能量消耗低及重量轻等优点,作为一种高效率的分离机械,广泛应用于化工、食品、制药及采矿等工业部门。这种离心机的工作原理,是根据被处理物料在强大 相似文献
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<正> 分离机械通常是指用于分离液固非均相系统的机械。近年来国外在发展分离机械新品种方面,有一种业已成熟的产品,即连续操作现代过滤式螺旋卸料离心机(以下简称过滤式螺旋离心机)。它具有生产能力高、固相脱水程度好、能量消耗低及重量轻等优点,作为一种高效率的分离机械,广泛应用于化工、食品、制药及采矿等工业部门。这种离心机工作的原理,是根据被处理物料在强大的离心力场(分离因数为1500~2000)作用下,在过滤筛网上进行快速的薄层脱水的同时,用螺旋连续地将生成的滤渣卸出。目前世界上工业发达国家如德、法、美、英、荷兰、苏联、奥地利及日本等国均生产这种离心机系列产品。过滤式螺旋离心机发展的方向是研制用于处理有毒、易燃、易爆和无菌的物料以及带 相似文献
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随着钛白粉行业的快速发展,硫酸法生产工艺对分离设备的要求也越来越高。为满足市场需求,公司研发了新型LWLC450×1250螺旋卸料沉降-过滤离心机,并将其应用在硫酸法钛白粉生产中。结果表明:离心机分离出的液相含钛总质量浓度大于160 g/L,固体含钛质量分数小于0.41%,大大提高了钛液的质量和收率,同时能有效节能降耗,改善工作环境,是钛白粉行业理想的分离设备。 相似文献
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《Chemical engineering science》1987,42(1):155-162
The well-known classification (type I and type II) of non-isothermal dynamic adsorption processes in fixed beds according to the relative velocities of the temperature and concentration fronts is discussed for the multi-component case. In this case a new type (type III) occurs that is only possible in multi-component systems. An example for a real type-III process is given on the basis of the numerical solution of model equations dealt with in Part I of this paper. 相似文献
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Multifactorial etiology is involved in premature atherosclerosis related to diabetes. Most of the mechanisms that are responsible
for the etiology in diabetes have remained unsolved so far. Type 1 diabetes is associated with a favorable lipid pattern and
with microangiopathy, which is not true for type 2 diabetes, which is related to dyslipidemia and macroangiopathy. The aim
of this work was to evaluate the degree of LDL modification related to the types of diabetes. The question is whether the
LDL could be differently modified since the pathogenesis of type 1 and type 2 diabetes is different. Thirtyone type 1 (19
male and 12 female) and thirty type 2 (18 male and 12 female) diabetic patients were included in this study. Isolated LDL
was analyzed by capillary electrophoresis for diene conjugate content and for electronegativity. LDL from type 1 diabetes
subjects showed the highest electrophoretic mobility (P=0.000). Instead, the diene conjugates contents were higher in the
type 2 patients with HbA1c levels >8% (P=0.007). In conclusion, the increased diene content in type 2 diabetic subjects in
poor glycemic control and the highest LDL mobility found in type 1 subjects show that the LDL undergoes different modifications.
In type 2 patients, electronegative LDL are in a state of higher susceptibility to oxidation, whereas in type 1 subjects the
finding of electronegative lipoproteins could provide an index of the relative atherogenicity of circulating LDL, especially
as LDL has higher electrophoretic mobility than normal subjects. 相似文献
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多管式换热器是一种较为新型的高效换热器,目前对于这种换热器的研究较少,其传热性能的研究也鲜见报道。对多管式换热器做了初步的研究,并以实际工业装置工况为例,采用管壳式、多管换热器和翅片管多管式作为换热器设计的三种方案,利用HTRI软件进行模拟,比较出三个方案在传热和经济方面的性能差异,分析多管式换热器在工业应用中优势,为研究和推广这种新型的换热器提供有价值的参考依据。 相似文献
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介绍了NC501型甲醇催化剂的装填数据、测温点分布和升温还原方案,论述了该催化剂的还原过程和生产运行情况,通过NC501型和C207型两炉催化剂生产运行数据的对比,对NC501型催化剂的使用效果进行了总结。 相似文献
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Yugo Shimizu Prof. Dr. Hiroyuki Ogata Dr. Susumu Goto 《Chembiochem : a European journal of chemical biology》2017,18(1):50-65
Polyketide synthases (PKSs) catalyze the sequential condensation of simple acetate units to produce a large class of natural products, including pharmacologically valuable compounds. PKSs are classified into three types on the basis of their domain structures; type III PKSs have the simplest domain structure, although their products have various structures and functions. The sequence–function relationship is fundamental for predicting enzyme functions, but it has not been well investigated in type III PKSs to date. Consequently, the current methods for predicting type III PKS functions are still immature in comparison with those that target type I/II PKSs. In this review we summarize the current functional and phylogenomic knowledge about type III PKSs and propose a new classification of their enzymatic reactions. We also discuss possible directions for the development of better computational tools for functional prediction of type III PKS homologues. 相似文献
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推导出A型、AN型腿式支座地脚螺栓中心圆直径的普遍计算公式,运用标准JB/T4713—92“腿式支座”所给的经验公式来验证普遍公式的正确性,解决了非标A型、AN型腿式支座地脚螺栓中心圆直径的计算问题。 相似文献
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本文介绍了邻苯二甲酸型、间苯二甲酸型和双酚A型不饱和聚脂树脂(以下简称聚酯树脂)以及乙烯基酯树脂型胶衣树脂的结构与特性. 相似文献