内齿行星轮行星齿轮的传动原理

内齿行星轮行星齿轮传动是行星齿轮传动的一种新型式。本文探讨了内齿行星轮行星齿轮传动的传动原理及其运动学计算、动力学计算、装配条件和齿廓不重迭干涉等。     

开发循环流化床锅炉

文章介绍了国内外循环流化床锅炉发展简况,指出了该燃烧技术的特点及发展该技术的关键问题,阐述了循环流化床锅炉在我国的应用前景。     

ST■UBLI2232多臂机运动分析

ST(?)UBLI多臂机是目前织机上应用最广泛的开口机构之一.本文以ST(?)-UBL12232为例来对这类多臂机的运动规律进行分析.从实测的凸轮尺寸来推算转子臂的运动规律,进而计算出提综臂的运动规律.     

多离子交换器功能监督仪表改进

目前水处理设备中普遍采用以记录仪为主体的失效监督仪,以监督其阳床及阴床中的树酯工作动态.本文提出对该仪表的改进,引入单片机,构成智能化仪表,对系统中水样的电导率变化进行监督.当树酯功能失效时,可发出终点信息.它可对阳床和阴床同时监督,且可用于多台阳床及阴床同时监督,从而可节省多台现用仪表.     

振动流化床中流体力学的研究

在振动流化床冷模试验装置上,以陶瓷球、柠檬酸、尼龙1010、聚氧化乙烯等为试料,研究了一定振幅和较低开孔率下振动频率、床层高度、气速等参数对振动流化床床层压力降的影响,得出了振动使床层最小流化压力降降低的程度。还考察了振动对难以流化物料的流化性能的影响。     

Comparison between simulated moving bed and reverse flow chromatographic reactors for equilibrium limited reactions

A staged linear model, containing five parameters, is developed to compare equivalent simulated moving bed chromatographic reactors (SMBCR) and reverse flow chromatographic reactors (RFCR). A first order reversible reaction and linear adsorption equilibrium, with preferential adsorption of the reactant is assumed. The analysis uses simple, easily computable analytical solutions that rigorously represents the transients in the cyclic steady state for both the RFCR and the SMBR. A comparison between the two types of reactors is carried out to determine the maximum conversion attainable and the range of operation where these systems have advantages over conventional steady state reactors. It is found that the maximum conversion of both reactors is similar. The range of operation in terms of amount of catalyst and range of switching times favors the RFCR, while the conversion at low separation factors favors the SMBCR.     

一种新型反应设备——旋转填料床技术及其应用

旋转填料床技术是一种突破性的过程强化新技术，在化工、能源、环保、材料、生物化工等工业领域中有广阔的商业化应用前景，笔者概要介绍了该新技术的特点，国内外研究开发和应用。     

A mathematical model for a biological fluidized bed reactor

A physical model is given in the present report for representing a three-phase biological fluidized bed reaction system which consists of microorganism-coated particles, waste water and air. The system is assumed to be well fluidized. The physical model can be represented by two differential equations describing, respectively, the substrate axial dispersion and diffusion/reaction. Numerical values of the physical parameters are selected from the literature or estimated from semi-empirical equations. The governing system equations are solved by an iterative finite-difference scheme. The theoretical predictions are compared with several experimental measurements and the agreement between them found to be very good, validating the physical model reported here.     

重庆瓦斯利用的环境影响评价

重庆是全国有名的高瓦斯矿井和煤与瓦斯突出矿井集中的地区,瓦斯资源丰富。基于矿井安全生产,从1958年开始抽放矿井瓦斯,抽放量不断提高,瓦斯利用规模迅速扩大。瓦斯的主要成分是甲烷,甲烷是主要的温室气体之一,也是一种洁净优质能源。利用瓦斯,减少瓦斯空排量,对节能降耗,减缓温室效应,保护环境有着重要的意义。     

冷床上料系统双槽上卸钢装置的改造

济南钢铁总厂针对２５０ｍｍ半连轧机原冷床上料系统存在的问题进行了技术改造，将双槽推料改为单槽推料，并优化控制系统，简化设备结构，提高了工作效率，满足了半连轧机后面配６５ｍ超短冷床实现高速、无间隙轧制的生产要求。