GE水煤浆气化煤浆制备棒磨机的改造及运行总结

针对大型棒磨机达不到设计产能、漏浆严重、出现乱棒、条筛断裂等问题,结合棒磨机的结构特点及技术特性等,探讨改进措施,实现了棒磨机的稳定、可靠运行。     

水煤浆制备中棒磨机系统常见问题及改进措施

水煤浆气化装置煤浆制备系统主要是将适当颗粒的原料煤、工艺水及添加剂按比例送入棒磨机中进行研磨,通过控制煤浆粒度制得合格的水煤浆。其中棒磨机系统是煤浆制备的关键系统,其运行是否安全可靠,直接影响整个气化系统的长周期平稳运行。针对棒磨机系统在运行中遇到的问题,提出相应的改进措施,使得设备能够可靠运行,进而达到整个系统的安全平稳运行。     

MBS2736棒磨机筒体衬板技术改造

分析云南云天化股份有限公司三环分公司磨矿厂MBS2736棒磨机筒体泄漏的原因,通过对棒磨机筒体衬板进行技术改造,解决了筒体泄漏问题,提高了棒磨机的运行率,延长了设备使用寿命,为磷酸装置的生产提供了有力的保障。     

MBS2736棒磨机简体衬板技术改造

分析云南云天化股份有限公司三环分公司磨矿厂MBS2736棒磨机筒体泄漏的原因,通过对棒磨机筒体衬板进行技术改造,解决了筒体泄漏问题,提高了棒磨机的运行率,延长了设备使用寿命,为磷酸装置的生产提供了有力的保障.     

水煤浆制备中磨机的改型及运行结果

通过球磨机和棒磨机的工作原理比较,得出棒磨机具有比球磨机省电、煤浆大颗粒少、负荷容易提高等优点。上海焦化有限公司对原有球磨机进行了改造,并对两种磨机改造前后的运行情况进行了技经分析,从而证实了,在水煤浆气化装置中,棒磨机比球磨机更具有竞争性。     

提高水煤浆浓度的技术改造

水煤浆制浆棒磨机滚筒筛的通过率,直接影响棒磨机的成浆性能。通过对棒磨机滚筒筛进行技术改造后,在其他生产条件不变的前提下,水煤浆的浓度平均提高2%左右,大幅降低了气化所需的氧耗和煤耗,提高了气化效率和有效气产量。     

溢流型棒磨机开式齿轮失效问题的探讨

溢流型棒磨机作为一种常见的化工设备,其能否安全运行主要收其中开式齿轮润滑状况的影响。通过对棒麿机内开式齿轮的工作状态进行分析,得出了对润滑性能的合理要求。通过分析几种典型润滑添加剂的性质,最终确定选择石墨作为开式齿轮的润滑济。最后对添加剂的喷洒及磨合工况进行了简要说明,提供了一种防止溢流型棒磨机形式齿轮失效的措施。     

水煤浆棒磨机钢棒装填量工业实验

棒磨机的钢棒充填量及钢棒级配直接影响水煤浆的粒度分布,而粒度分布又是影响煤浆成浆性能的主要因素。通过工业试验摸索棒磨机的钢棒充填量及级配,从而生产出粒度分布合格的水煤浆。     

大型棒磨机乱棒事故的处理与分析

大型棒磨机配套使用的钢棒较长,在停机备用期间,容易因盘车操作引发乱棒事故。详细介绍了一起大型棒磨机乱棒事故的原因及处理过程,并对事故防范和安全管理进行了探讨。     

水煤浆棒磨机的钢棒装填量及成浆性研究试验

棒磨机的钢棒装填量和钢棒的级配直接影响水煤浆的粒度分布,而粒度分布又是影响水煤浆粘度的重要因素之一,通过水煤浆成浆性试验摸索棒磨机的钢棒装填量及级配,从而生产出浓度、粘度、粒度分布合格的水煤浆。     

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.     

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。     

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。     

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