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煤化工中变换装置长期运行,会因为原料气过滤器压差高、变换催化剂积灰严重、换热器结垢压差高而影响长周期运行,增加预变炉单元后,成功解决影响装置运行的问题。 相似文献
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龙宇煤化工有限公司气化装置存在负荷低、冷却器入口堵塞严重、激冷气管线腐蚀严重等问题,通过改造达到激冷气压缩机流量的显著增加的目的,同时最大限度地减少了系统积灰现象,实现激冷装置的高效运行。目前该系统负荷明显提高、甲醇产量明显增加,经济效益显著。 相似文献
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对Shell粉煤气化装置中煤气冷却器的积灰问题进行了探讨,并介绍了解决积灰问题的措施。通过采用配煤技术、改造煤气冷却器过热段吹灰器、新增1台能力较大的激冷气压缩机等措施后,基本上解决了制约气化装置的积灰问题,实现了高负荷下的长周期运行。 相似文献
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气化装置和变换装置作为高度连续化得生产装置,两装置间联系密切,本文从气化异常时对变换装置产生的影响以及变换装置异常时对变换装置产生的影响进行对比分析,摸索出气化装置与变换装置间相互制约因素,保障气化装置与变换装置能够平稳运行。 相似文献
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The increase in refractoriness referred to here is usually termed freezing. The study was undertaken to overcome the tendency of pyrometric cones to set or freeze when subjected to prolonged heat treatment when the temperature is more or less fluctuating. The work includes a study of the freezing tendency of some natural clays, of several pottery bodies, and of pyrometric cones. A body was developed that does not freeze under the treatment that produces the phenomenon in the other materials tested but the cause is not established. 相似文献
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介绍煤化工装置空分氧泵变频器的电气控制原理,分析氧泵变频器因系统晃电而导致跳停的原因,通过对变频器增加直流支撑装置,确保空分氧泵变频器稳定运行。 相似文献
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本文介绍了日本在煤气化联合循环发电、煤加氢热解,煤加氢液化和水煤浆等煤转化技术方面是最新进展及中度厂部分试验结果,同时也介绍了日本最近提出的煤气化联合燃料电池新转化工艺的方案。 相似文献
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《Journal of aerosol science》1999,30(3):279-288
A technique based on fluorescence scattering by microdroplets has been shown to be capable of measuring instantaneous rates of photochemical reactions in microdroplets. The technique has been applied to study trans -to-cis photoisomerization of thioindigo dye in single solution droplets suspended in an electrodynamic balance. Through an analysis it is shown that the concentration distributions of isomers remain uniform in a droplet under the experimental conditions; thus, the scattered fluorescence intensity from the droplet is proportional to the concentration of solely fluorescent trans isomer molecules. The steady-state scattered fluorescence intensity versus incident laser power data have been used to interpret the kinetics of the reaction. The results show that the rate constants can be determined from the scattered fluorescence intensity versus time data. The technique is particularly suitable when only one species fluoresces in the photo-reactive wavelength range while other species present in a droplet do not. 相似文献
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介绍了美国近年来在水泥应用方面的研究动态。其基本方针是从材料科学,尤其是脆性材料理论出发,通过改变水泥基材料的组成和改进成型方法,使硬化水泥石的结构趋于合理,从而大幅度提高水泥的各种性能,最终达到部分取代陶瓷、金属、塑料和木材等其它材料的目的。这种新型的水泥材料被称为ACBM(Advanced Cement Based Materials)。美国已建立了ACBM研究中心,并出版了名为“Cementing The Future”的专门刊物来介绍这方面的科技新信息。 相似文献