共查询到20条相似文献,搜索用时 62 毫秒
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介绍了一种专用节电集成系统在烧碱蒸发工序大功率电机的循环水泵上应用的试验情况,以及该系统在具体实施中的经验与方法。试验结果表明,节电效果明显。 相似文献
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针对尿素装置蒸发系统打循环时的工况进行动态分析,找出尿素产品质量参数的变化规律和影响因素,提出操作上的优化措施。 相似文献
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1无动力均化原理。如图1所示,无动力均化库就相当于图中左边的一个大库,在库的进料处设一布料装置实现混均布料,在库内设计一个插入件(即导料装置),使库变成多个小库,在生料下落过程中,实现多点取料,混合下料,层流出料,就可以实现类似有n个小圆筒库向一条皮带输送机按照时间先后顺序依次下料混均的过程。在圆筒库下锥体设置一个层料流分流装置和防喷装置,这样可以保证层料流和恒流下料,避免放料均化过程中出现生料起拱和喷粉,使得物料顺利下落。在不改变生产工艺流程和操作方法的条件下,使生料圆筒库内物料实现无动力均化,并达到下列指标。 相似文献
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料液在闪蒸脱气设备中的蒸发是自蒸发过程,因此不需要加热面,有别于其它蒸发设备。本文以蒸发量为487.8kg/h用于液体奶的闪蒸脱气设备为例,介绍闪蒸脱气设备的设计及其应用。 相似文献
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通过显微镜,观察了氯化钙在甲醇水溶液中的结晶情况,发现在不同的结晶方法和条件下会形成许多不同形状的结晶体,有立方形、片形、三角形、六角形、十字形、六边形等;研究了结晶体的形状和大小与结晶温度、结晶时间和溶液浓度等的关系,发现在蒸发结晶过程中,开始形成的结晶体棱角分明,随着静置时间的延长,小颗粒溶解,大颗粒长大,结晶体的棱角趋于平缓,形状趋于一致,形成不规则多面体;浓度较高时,形成的结晶体粒度较小,浓度较低时形成的结晶体粒度较大;与蒸发结晶相比,自然结晶出的颗粒较大,而通过蒸发结晶出的颗粒较小,并初步探讨了结晶现象的本质规律。 相似文献
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为了提高固井施工的质量,加强对固井施工设备的管理,保证设备安全运行,达到预期的运行效率。而通过质量管理体系的PDCA循环,及时解决固井设备存在的问题,使固井施工设备达到使用的条件,满足固井施工的技术要求。 相似文献
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Meixiang Gao Qi Xin Wan Sun Jiaqi Xiao Xianqin Lu 《International journal of molecular sciences》2022,23(23)
Currently, the production of furan aldehydes from raw biomass suffers from low furfural yield and high energy consumption. In this study, a recyclable and practical method was explored for the preparation of furfural from corn stover by the one-pot reaction by acidic lithium bromide solution (ALBS) without pretreatment and enzymolysis. In the ALBS reaction, the furan aldehydes were generated by the degradation of lignocellulose; however, the products were unstable and were further dehydrated to form humins. So, dehydration reaction was inhibited in this study, and the high yield of furan aldehydes was obtained, in which 2.94 g/L of furfural and 2.78 g/L of 5-hydroxymethyl furfural (5-HMF) were generated with high solid loading (10 wt%), the presence of commercial catalyst ZSM-5 and co-solvent tetrahydrofuran (THF) at 140 °C for 200 min. Via this method, almost 100% of hemicellulose was transformed to furfural, and 40.71% of cellulose was transformed to 5-HMF, which was based on the theoretical yield of HMF (8.35 g) from glucose (29.30 g) produced from cellulose. After the reaction, the catalyst ZSM-5 was the main component in the solid residue and kept a suitable performance. THF azeotrope was easily separated from the slurry by evaporation. During the removal of THF, lignin was precipitated from the liquid phase and showed lower molecular weight and abundant active groups, which was a potential feedstock for producing valuable aromatics and polymers. Thus, in a one-pot reaction, the ideal yield of furan aldehydes from raw biomass was obtained on a lab scale, and the catalyst, THF, and LiBr were easily recycled, which provided an option to realize the economical production of sustainable furan aldehydes from raw biomass. 相似文献