仿人思想在水泥篦冷机环节的开发与应用

针对篦冷机滞后性强、系统非线性、无法直接观测料层厚度等工艺难点,文中提出运用仿人控制的思想,设计基于规则的单控制量仿人智能控制器,并开发相应的软件。该控制器实际运行结果表明,仿人控制器在运行中不仅节省人工投入,实现了自动控制,而且可将篦冷机的风室压力控制在一定范围内,使工况更加稳定。     

篦冷机一段部分区域熟料输送速度的调整

调整篦冷机一段部分区域熟料输送速度,一方面增加阶梯篦床熟料料层厚度,一方面消除一段篦床两侧红色"沟流",达到提升热回收效率的目的.调整阶梯篦床整体倾斜度,阶梯篦床熟料实现料层厚度均匀增加,二次风温度上升,波动减小;在篦冷机两侧,将两个活动篦板之间设置一个固定篦板,改成设置三个固定篦板,改造后,篦冷机两侧的红色"沟流"基...     

刚玉—莫来石预制件在水泥窑炉系统的使用

1前言我公司5000t/d水泥生产线2006年投产,所配置的篦冷机为TC12102型第三代推动式篦冷机,为提高冷却效率,采用控制熟料料层厚度在600~800mm的厚料层操作技术。篦冷机矮墙为刚玉质浇注料现场浇注而成,使用周期短,一般在2~4个月。     

离心式风机进风闸板传动机构改进

我公司5　000t/d生产线使用的TC-12102型篦冷机配备有15台冷却风机。该风机配套电动执行器为ASP型,设计额定转矩为250N·m。在正常运行过程中,当篦冷机料层厚度及颗粒组成发生变化时,料层阻力发生波动,经由风机进入篦冷机的风量也会发生变化,为了保持恒定风量,经常需对风机进风量进行调整。风机进风口结构如图1所示,执行器通过传动机构带动闸板旋转,调节进风口的开度,控制风量。     

延长篦冷机耐火内衬使用寿命的技术措施

我公司回转窑为φ2．8／2．4×40m预分解窑,日产熟料600吨,篦冷机为2．2×12．6m水平推动篦冷机,篦冷机内料层厚度控制在350mm,内衬全部采用粘土质耐火砖砌筑（见图1）。在生产中存在如下两个问题。     

用模块化供风的理念改造第三代篦冷机的成功实践

正水泥厂回转窑篦冷机应用至今已发展到第四代。第四代篦冷机的一个显著特点就是篦冷机的模块化供风。篦冷机篦板的通风量能根据篦板上熟料料层厚度及熟料颗粒情况的变化适时自动调节,可达到风量与熟料情况的合理匹配,从而取得较好的冷却效果、消耗较低电量。由于初期投资的限制,目前我国多数水泥厂使用最多的仍然是第三代篦冷机,如何立足现有设备提高熟料篦冷机的冷却效果是许多仍在使用第三代篦冷机的水泥厂需要解决的问题。我公司下属企业2008年投     

TC型自力式稳流阀的研发与应用

熟料自旋转的窑内卸落到篦床上,由于粒度离析等作用,会引起篦床上熟料厚度和粒度分布不均;熟料向篦冷机输出端运动时,由于往复运动,会引起熟料的波浪状起伏,从而导致料层厚度的变化。这些就使得床面上各点的料层阻力分布不均且时时发生变化。第三代控制流篦冷机采用带充气梁的阻力篦板,相对减小了料层阻力变化对熟料冷却的影响,使换热效率大为提高。然而“阻力篦板”阻力大,动力消耗高,且原理上不能完全消除料层阻力变化对供风的影响。第四代篦冷机在每块篦板下配有自力式稳流阀,可根据篦上料层阻力变化及时调节阀门阻力,达到稳定风量的目的,控制简便准确。     

TSD型电容式料位控制器在高温环境下应用改造

电容式料位控制器在我公司主要应用于各种料仓、料库、堆场及篦冷机下料控制用,对粉状及固体物料进行连续的料位监测和控制. 1 问题的提出 在我厂第二条4 000t/d水泥熟料生产线上,控制篦冷机下料共用了34台TSD型电容式料位控制器,主要利用料位控制器的输出信号控制电动机带动挡板开合,以达到自动下料并保证篦冷机内正压的目的;由于料斗内熟料的温度很高,直接影响到转换电路部分,使电子元器件很不稳定,灵敏度经常需要调整,而且经常出现转换电路板烧坏、烧毁现象,致使料位控制器频繁调整、更换转换电路板,影响了生产的稳定运行.     

新型篦床料位检测技术

在篦冷机二段内部安装机械检测料位装置,通过外部指示杆指示旋转角度大小,再由信号变送,将检测的角度偏移传回控制系统,从而得到篦冷机实时料层厚度。经实际应用,该装置解决了由于二段料层波动,导致窑系统不稳定,影响生产的问题。     

TSD型电容式料位控制器的高温环境下应用改造

电容式料位控制器在我公司主要应用于各种料仓、料库、堆场及篦冷机下料控制用，对粉状及固体物料进行连续的料位监测和控制。１问题的提出在我厂第二条４０００t／d水泥熟料生产线上，控制篦冷机下料共用了３４台TSD型电容式料位控制器，主要利用料位控制器的输出信号控制电动机带动挡板开合，以达到自动下料并保证篦冷机内正压的目的；由于料斗内熟料的温度很高，直接影响到转换电路部分，使电子元器件很不稳定，灵敏度经常需要调整，而且经常出现转换电路板烧坏、烧毁现象，致使料位控制器频繁调整、更换转换电路板，影响了生产的稳定…     

乙烯酮(双乙烯酮)下游产品废水的治理技术

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。     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

三种煤样燃烧热的测定

本文通过三个厂家提供的三种煤样燃烧热的测定,由测定结果综合得出3号煤样燃烧最完全、燃烧热也最大,是三个煤样中最好的一种。     

Semi-empirical equation of state of metals. Equation of state of aluminum

A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO₂) of density 0.08 g/cm³. __________ Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008.     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

小议汽车涂装工艺设计对涂装成本的影响

论述了涂装工艺设计对涂装设备投资、涂装生产成本的影响。     

Measurement of the gradient of viscosity with composition of mixtures of non-ideal gases

A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%.     

Calorimetric and Computational Study of Enthalpy of Formation of Diperoxide of Cyclohexanone

A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out.     

塔设备改造选型的分析

就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后，着重介绍一种新型塔板（导向梯形浮阀塔板）和一种新型填料（波环填料——乾隆帕克）。     

Effect of degree of deacetylation of chitin on the properties of chitin crystallites

In the present article, chitin from crab shell was systematically deacetylated using a NaOH treatment with control of the reaction time. The degree of deacetylation, monitored using solid-state NMR, revealed that the reaction was pseudo-first order. Based on this, swollen and NaOH-saturated particles are proposed as the reaction system. The weight loss of the partially saponified and neutralized samples after HCl hydrolysis increased linearly with the degree of deacetylation. The crystallinity of the samples was found to increase after acid hydrolysis. According to conductimetric titration, the surface charge density of the crystallites, after acid hydrolysis, was found to increase with base treatment time. The effect of surface charge on the formation of a chiral nematic phase, due to the rodlike nature of the crystallites, was explored. These results show that because the contribution of charged particles to the ionic strength was significant the double layer compression was affected, especially since the surface charge density was close to the Manning limit. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:373–380, 1997