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新疆农五师八十九团加工厂在2003年棉花加工过程中,重安全、抓质量取得了明显的成效,截止到11月28日加工皮棉9365460.50公斤,皮棉一级品率占98%以上,没有发生一次安全事故,产品质量比往年有较大幅度的提高。 相似文献
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本文综述了我国石油系橡胶操作油发展状况,包括芳烃油,环烷油及石蜡油。对现存问题进行了探讨和分析,并且指出石油系橡胶操作油是今后我国橡胶工业中软化剂的发展方向. 相似文献
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This paper integrated a two-dimensional axisymmetrical transient model applicable to cold-start emission applications.The model can be used to simulate and explain effects of the flow and temperature distribution on performance of a converter.The evolutions of distribution of the temperature and concentration in the monolith during the cold-start period and the effects of flow distribution in the monolith on the cold-start performance are simulated in terms of the integrated model.The investigation indicates that the axial and radial gradients of temperature of the solid become steeper as the inlet gas temperature ramp increases; this furthermore results in the movement of reaction region in the monolith,and the flow distribution in the monolith affects the radial distribution of temperature of the solid;the radial gradients of temperature of the solid become greater as the flow uniformity index decreases,whereas the light-off time doesn't always increase as the flow uniformity index decreases.The analyses on the distribution of temperature and concentration in the monolith show that the catalytic reaction zone concentrates in central area near the front face.The predicted curves of the velocity distribution have a good agreement with the experimental data. 相似文献
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催化裂化装置是炼油厂二次加工装置中C5产量最多的装置。本文就催化裂化C5馏分在石油炼厂中分离、加工利用途径进行了论述,同时扼要地介绍了其在化工领域中的应用情况。催化裂化C5馏分的加工利用不仅是石化炼厂深加工、生产高附加值产品的重要手段之一,也是发展我国化工工业的主要途径之一。 相似文献
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扫描电镜分辨率高,景深大,放大倍数连续可变,可应用扫描电镜对小直径粉末样品的超微结构、几何尺寸进行观测。用扫描电镜观察超微粉末样品涉及:试样制备技术,观察时工作条件的选择等两个方面。 相似文献