共查询到20条相似文献,搜索用时 62 毫秒
1.
探讨了炼化企业在航煤产品中常常出现的机械杂质、悬浮物等固体颗粒的鉴别方法、种类判定,以及影响航煤洁净度指标杂质的产生原因、影响程度和防御措施。 相似文献
2.
探讨了炼化企业在航煤产品中常常出现的机械杂质、悬浮物等固体颗粒的鉴别方法、种类判定,以及影响航煤洁净度指标杂质的产生原因、影响成度和防御措施。 相似文献
3.
对汽油加氢装置改造为航煤加氢装置后,逐渐暴露出的航煤产品指标不稳定、装置能耗偏高等问题进行了分析,认为催化剂活性下降及分馏系统流程不合理是导致指标波动的主要原因。采取更换催化剂及生产优化等措施稳定了航煤质量,降低了能耗,提高了装置的技术经济指标。 相似文献
4.
从原料、工艺、设备等方面对特种PVC树脂生产过程中杂质粒子的产生原因进行了分析,并采取了有针对性的改进措施。 相似文献
6.
探讨了炼化企业在航煤产品中常常出现的机械杂质、悬浮物等固体颗粒的鉴别方法、种类判定,以及影响航煤洁净度指标杂质的产生原因、影响程度和防御措施。 相似文献
7.
8.
9.
11.
12.
13.
介绍了国内首套自行设计利用劣质褐煤加压气化制氨工艺鲁奇炉运行的状况及出现的问题。总结了自1972年以来,第一代鲁奇炉在运行中存在的主要问题及相应的技术改造状况,并对鲁奇炉运行存在的问题及发展方向进行了分析和展望。 相似文献
14.
15.
H. D. RÖHRIG D. STÖVER N. NEEF R. HECKER 《Journal of the American Ceramic Society》1976,59(5-6):185-188
Solid-fission-product diffusion was studied in pyrolytic carbon (PyC) coated particles. A method for determining diffusion coefficients is described. Changes in fission-product concentration profiles in the PyC are measured as a function of post-irradiation annealing time and temperature. The influence of irradiation history and type of PyC on the diffusion behavior of Cs isotopes is demonstrated. 相似文献
16.
Danny Westphal Tobias Teumer Thomas Schäfer Rolf-Jürgen Ahlers Matthias Rädle 《化学,工程师,技术》2021,93(10):1636-1642
Aerosols contain liquid and/or solid particles, which can pose a significant risk to humans. In order to detect these potential hazards at an early stage, this paper shows the possibility of measuring aerosols with an adapted particle sensor system (ProxiCube®) and displaying the liquid and solid components separately. To demonstrate the reproducibility of the measurements, samples are monitored simultaneously with two ProxiCubes and a well-established reference system. 相似文献
17.
超微颗粒在固体中的分散技术的研究进展 总被引:2,自引:0,他引:2
结合微米分散技术基础,对超微颗粒在聚合物固体中分散及其结晶研究的进展深入探讨,揭示了聚合物基(如PET)-纳米复合材料的颗粒分散经过纳米前驱物中间阶段,再进行聚合复合与熔体复合,得到颗粒均匀的分散体系。这种分散体系更易诱导聚合物结晶成核,明显提高其结晶速率2~3倍,同时可增加聚合物颗粒表面的空间位阻效应。 相似文献
18.
侧伸式搅拌槽固液悬浮性能 总被引:5,自引:2,他引:5
采用f2 m′4.2 m侧伸式搅拌槽,研究了搅拌桨安装位置、通气速率、固体颗粒浓度和液位高度对侧伸式搅拌槽颗粒悬浮性能的影响. 结果表明,搅拌轴水平偏转角对功率准数的影响很小,均布式为侧伸式搅拌槽搅拌桨的最佳排布方式,最佳偏转角bopt=10o;临界转速NJS最小值出现在搅拌桨伸入长度/搅拌桨直径比L/d=1.44处;降低搅拌桨安装高度h为0.75d左右,相比于传统的h=1.5d可减少约30%能耗;液位高度/搅拌槽直径比H/T<0.5时,NJS随H的升高而迅速增大. 得到了通气量QV与NJS的关系式NJSG-NJS=1.46QV1.15和固相浓度w对NJS影响的关系式NJSμw0.27. 相似文献
19.
V. B. Storozhev 《Aerosol science and technology》2013,47(2):179-185
The process of the liquid-phase sintering is quantitatively considered from the viewpoint of the thermodynamic approach in application to isothermal conditions. The model is based on the assumption that a metastable liquid phase is formed near the contact of two particles. The most probable way of the sintering process is defined by variation of configuration of the system consisting of two partially molten particles and minimization of the free energy of the system. As a result of calculations based on the model, the following are obtained: i) step-by-step configurations of partially molten particles during the process of sintering, and ii) the intensity of the solid-liquid transition as a function of the sizes of the particles and their temperature. 相似文献