共查询到20条相似文献,搜索用时 109 毫秒
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在精细化工装置布置过程中,需高度重视防火间距,对装置与防火间距进行深入分析.首先阐述了精细化工装置布置的安全要点,其中包括化工产品、自然条件、生产需求、防爆区域.然后介绍了精细化装置布置的基本概况.最后着重探讨了化工装置布置与防火安全的间距要求. 相似文献
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介绍了中国石油四川石化有限责任公司硫磺回收联合装置中酸性水汽提装置、溶剂再生装置及硫磺回收装置的特点.详细阐述了影响酸性水汽提装置、溶剂再生装置脱硫率以及硫磺回收装置硫回收率的因素,提出了提高联合装置硫回收率的相应措施,从根源上降低SO2排放,为炼厂环保装置的平稳运行提供参考. 相似文献
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在粉体工业中,为了控制粉碎机、分级机的加工粒度,增加了用在线式自动粒度测定装置的必要性。目前所发表的各类装置有以下几种: 1.求比表面积的测定装置; 2.利用风力分级机的测定装置; 3.利用激光的测定装置; 4.利用静电的测定装置等。这些自动粒度测定装置中,据报道在线式检测装置可以应用,但其实际运行的台数或应用实例几乎没有。究其原因,则可能是这些机器本来是为实验研究用而研制的,实际用到现 相似文献
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催化裂化装置关键设备的结焦严重制约了装置的长周期运行,如何通过生产操作和技术进步减少结焦是催化裂化装置必须面对的问题.以抚顺石油一厂催化裂化装置为例,分析论述了影响及抑制装置结焦的因素,从而为催化装置的长周期运行提供一些办法. 相似文献
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介绍一种分离胎面保鲜塑料布装置.该装置主要由涨缩滚动装置、动力装置、辊简分离保鲜塑料布装置和压料装置组成.分离胎面保鲜塑料布装置采用机械分离胎面保鲜塑料布,可避免人工撕扯保鲜塑料布造成的塑料布损坏及胎面贴合面的污染,同时能降低人工劳动强度和生产成本,减少环境污染,提高工作效率. 相似文献
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对抚顺乙烯裂解装置自开车以来历年主要技术改造进行了总结.通过技术改造,乙烯装置产能得到提高,装置各项经济技术指标不断完善和提高,保持了装置的长期安全稳定运行. 相似文献
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总结了天津PTA装置开车来,通过工艺的优化调整,技术创新、减少非计划停车,提高装置负荷,实现了装置达标,安全、稳定高负荷运转,深挖装置潜力,降低物耗、能耗、实现装置效益最大化。 相似文献
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扬子乙烯绩效分析项目是在所罗门公司派遣专家的协助下,以扬子乙烯装置为核心,寻找该装置在工艺、计划、设备检维修、财务及行政管理等诸方面与世界同类先进装置的差距,分析原因并共同制定一系列改进措施,按步骤、按次序地进行实施,从而不断缩短、进而消除与世界先进水平存在的差距,提高扬子乙烯技术管理水平和装置竞争力。 相似文献
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Modular plants consist of modules that autonomously operate parts of the plant. These modules are technically and organizationally limited areas of the plant that fulfill defined tasks. Starting with these modules, companies can create capacity either by equaling up modules from general structures or by numbering up equipment. Here, the economics of a modular chemical plant are compared with those of a traditional large‐scale plant by investigating the net present value. The modular plant presents a more efficient concept for fast growing products or products with volatile demands. This is because the market impact during operation is more important than the preceding influence of the investment. In those cases, the effects of flexibility surpass the effects of scale. 相似文献
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中氮改小氮是当前的热点,改造后的实际效果却从未见到过有说服力的报道。本文对我公司造气系统中氮改小氮流程的实践进行了定性和定量评价,意为未改者提供改造依据,为已改者提供进一步完善的思路。 相似文献
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Ingmar Wester 《European Journal of Lipid Science and Technology》2000,102(1):37-44
Intake of plant sterols (4‐desmethyl sterols, phytosterols) reduces cholesterol absorption and lowers serum total and LDL cholesterol levels in humans. The use of dietary plant sterol regimens for lowering elevated serum cholesterol values has recently gained much interest, especially after the commercial introduction of margarines containing plant stanols esterified with fatty acids. The solubility of free, crystalline plant sterols and stanols in edible oils and fats is low, limiting their use especially in fat‐containing food. By esterifying of, e.g., plant stanols with fatty acids derived from a vegetable oil fatty acid ester of plant stanols with fat‐like properties are obtained. These fat‐soluble forms of plant stanols provide a technically feasible way of introducing the adequate daily amount of plant sterol into foods for optimal reduction of the cholesterol absorption, without changing the taste of the finished product. The cholesterol‐lowering effect of plant stanol esters has been extensively studied. Plant stanol esters effectively restrict the absorption of both dietary and biliary cholesterol causing plant stanol specific reductions in serum total and LDL cholesterol levels of up to 10% and 14%, respectively. Serum HDL cholesterol and triglyceride levels are not affected. The cholesterol‐lowering effect of plant stanol esters complements the beneficial effects of a healthy diet and cholesterol medication. 相似文献
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乙烯深冷分离过程需要冷剂为分离过程提供不同等级的冷量,可以把乙烯深冷分离过程作为一个冷阱;LNG气化过程中,需要加热,可以作为冷源.考虑到冷阱冷源的相互匹配,提出通过将LNG经过轻烃分离,为乙烯深冷分离提供冷量,降低了制冷公用工程消耗,同时LNG气化装置降低了加热公用工程消耗,且LNG分离出的轻烃直接供给乙烯装置作为裂解原料使用,优化乙烯装置裂解原料.以300万吨/年的LNG装置和64万吨/年的乙烯装置为例进行模拟计算得到,LNG轻烃分离装置可为乙烯冷分提供冷量41464 kW,降低乙烯冷分三元冷剂消耗75%,为乙烯装置提供优质裂解原料约65万吨/年. 相似文献
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Along with the construction of many coal-fired power plants, the supply of bituminous coal has become a key interest in China. An increasing number of coal-fired power plants consume lignite. However, lignite-fired power plants feature a very low plant thermal efficiency. But by means of lignite predrying, the efficiency of the lignite-fired power system can be improved, and the recovery of waste heat from the dryer can improve the plant thermal efficiency further. In the present article a theoretical model of the predried lignite–fired power plant with the waste heat recovery system based on basic thermal principles is developed and an existing case is analyzed. The above plant was shown to enhance the thermal efficiency of a conventional lignite-fired power plant by approximately 2.45%, which is 0.58% higher than predried lignite–fired power plant without waste heat recovery. Moreover, the influence of system parameters on the improvement of the plant thermal efficiency is determined. The results can be used in optimization of a waste heat recovery system in the thermodynamic process to increase the economy of lignite-fired power plants. 相似文献