共查询到20条相似文献,搜索用时 187 毫秒
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分析了改质沥青装置在工艺和设备等方面存在的问题,采取了变频技术、防堵、防焦等措施对改质沥青装置进行改进,取得了较为理想的效果。 相似文献
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九江石化新建10万t/a催化油浆减压拔出装置 总被引:1,自引:0,他引:1
5月份,中国石化股份公司九江分公司重点技术改造项目——10万t/a催化油浆减压拔出装置施工全面展开。该项目总投资近500万元,预计今年6月份建成投产,将生产出低蜡含量的高质量重交通道路沥青,每年可创造利润7800多万元。为了节省项目投资,缩短工程建设周期,让旧设备发挥新功用,该装置减压塔、分液罐、冷却器等关键设备以及部分工艺管线均利旧改造。 相似文献
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以沥青焦、煤沥青以及氧化沥青为原料,采用KOH活化法制备高比表面积活性炭。试验分别考察了不同原料及预处理工艺对活性炭孔径分布与比表面积的影响。发现采用不同原料所制备活性炭的孔径分布呈现出正态分布的特点,孔径分布范围介于0~5.0nm之间,峰的位置介于1.0~1.5nm附近。活性炭主要由1-1.5nm范围的微孔构成,大于2nm的中孔很少。在煤沥青不熔化处理过程中,其挥发分与H/C原子比要适中,挥发分过高与过低均不利于制备高比表面积活性炭。 相似文献
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分析了改质沥青装置在工艺和设备等方面存在的问题,采取了变频技术、防堵、防焦等措施对改质沥青装置进行改进,取得了较为理想的效果。 相似文献
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介绍溶剂脱沥青装置的工艺流程,从人员、设备、工艺物料、安全管理、自然环境以及其它方面提出威胁装置安全运行的因素,通过重视人员更替与安全意识培训、加强设备维护更新、优化工艺生产、落实安全管理体系、及早预防自然等措施,溶剂脱沥青装置的安全运行是可以控制的。 相似文献
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截止2008年,呼石化公司20万t/年溶剂脱沥青装置已投入运行16年,生产事故的多发期已经过去,目前正处于平稳运行阶段,但随着设备的进一步老化和工艺生产中存在问题的产生,装置的安全生产又面临着新的考验和威胁,本文对这些问题做一简要的分析,以期达到警钟长鸣防患未然的目的。 相似文献
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介绍了镇海炼油化工股份有限公司1996年12月建成的溶剂脱沥青装置的特点以及2002年3月的技术改造情况,对改造前后的操作参数、产品质量进行了对比。改造后,脱沥青油质量提高,溶剂脱沥青新的组合工艺经济效益明显。 相似文献
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煤焦油沥青的深加工技术 总被引:3,自引:1,他引:2
根据国内煤焦油沥青产量和存在的现实问题,介绍了由鞍山焦化耐火材料设计研究院(ACRE)开发并投产的近十套工业装置的改质沥青工艺技术。通过对沥青热聚合改质机理的论述,证明了ACRE工艺的合理性和技术的可靠性。并同国内外共型改质沥青工艺特点进行了比较,认为ACRE改质沥青工艺具有重要实用价值。 相似文献
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通过对国内外不同焦油加工工艺的比较,分析了不同工艺对沥青质量的影响。建议在建设焦油加工装置时,应根据市场重点考虑工艺路线和产品方案,选用沥青时,应根据不同需要对焦油加工企业的原料来源和生产工艺进行分析,合理选择。 相似文献
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塔河石化减压蒸馏装置为A级沥青产品生产提供满足其指标要求的减压渣油原料。当前生产存在的主要问题是:减压渣油闪点指标偏低且波动较大;蜡油馏分中沥青质和重金属含量较高,影响了A级沥青产品的正常生产。为此,调研收集塔河石化常减压蒸馏装置的生产数据,通过建立其工艺计算模型,进行模拟计算数据与装置标定数据、液相产品分离精度的对比,分析影响减压渣油作为沥青产品原料闪点不合格等问题;并利用SULPAK3.0工具分段对减压塔进行水力学计算,分析影响减压蒸馏分离精度的塔结构问题,提出了改进措施和方案,为减压深拔操作生产A级沥青产品提供依据。 相似文献
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Fatigue cracking is one of the major distresses of hot mix asphalt (HMA) at moderate temperatures. Two of the main properties of asphalt mixtures affecting fatigue are the cohesive bond energy of asphalt binder and the adhesive bond energy between asphalt binder and aggregate. These two parameters were calculated using surface free energy (SFE) theory. Furthermore, the fatigue life of asphalt mixtures was measured by indirect tensile fatigue test. The results showed that asphalt mixtures with limestone aggregates, with the most specific surface area, and magnitude of adhesion had the highest fatigue life. Moreover, asphalt mixtures made with asphalt binder having the highest penetration had greater fatigue life than the other mixtures. The enhanced fatigue life was attributed to the greater cohesion energy and higher resistance to fatigue cracking in asphalt film. Also, these mixtures had the highest adhesion energy on the contact surface between asphalt binders and aggregates, which increased the energy required to separate the asphalt binder from the aggregate surface and the occurrence of adhesion rupture distress. 相似文献
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乙苯-苯乙烯分离节能新工艺 总被引:1,自引:0,他引:1
顺序分离恒沸热回收技术是一项乙苯-苯乙烯分离节能新工艺。与相同规模不同分离工艺进行了比较,结果表明,采用该新工艺技术,可以显著降低装置综合能耗,而设备投资略有增加,综合经济效益显著,可用于苯乙烯装置设计与建设。 相似文献
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流化催化裂化(FCC)油浆外甩量通常超过5%,需要脱固处理得到澄清油再利用。本文分析得出了向延迟焦化、溶剂脱沥青、减压蒸馏、加氢等重质油加工装置直接掺炼,局限性较大;利用减压蒸馏、溶剂抽提、超临界流体萃取等工艺,对澄清油“掐头去尾”,分离组分可生产针状焦、环保橡胶填充油、沥青树脂以及碳素纤维等高附加值产品。油浆组分通过延迟焦化制备针状焦,是工业化应用主体方向,但国内产品质量与国外尚有很大差距;油浆制备环保橡胶填充油,在降低环保橡胶油多环芳烃(PCA)和8种危害性稠环芳烃(PAHs)分别至3%和10mg/kg以下的同时,必须提高芳碳率(CA)值至10%以上来保持橡胶相容性,其收率及生产成本是工业化应用推广的制约因素。 相似文献
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The aim of this work is to identify the volatile organic compounds (VOC) from asphalt by developing a process at atmospheric pressure under air flow in order to qualify and quantify the asphalt emissions by a standard analytical protocol with gas chromatography coupled to mass spectrometry. VOC formation depends on various parameters such as the asphalt temperature, the asphalt oxidation, and the humidity of air. This research contributes to improve knowledge of asphalt emissions. A decrease in VOC is mainly correlated with the asphalt temperature. 相似文献
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With the rapid development of modern industry, high-grade paving asphalt is massively required to meet the demands for modern transportation. As one of additives, natural asphalt is indispensable since it can improve the performance of paving asphalt in all aspects. However, the application of non-renewable natural asphalt is increasingly restricted by its limited reserves. It is imperative to find alternative approaches to produce high-grade paving asphalt. Fluid catalytic cracking (FCC) slurry oil is an ideal soft component for producing paving asphalt due to its high content of aromatics and resins. However, its bad ageing resistance limits its application to only low-grade paving asphalt. In the present work, a novel approach for producing high-grade paving asphalt was investigated using chemically modified FCC slurry oil and deoiled asphalt (DOA). The FT-IR and NMR results showed that dehydrogenation and condensation reaction occurred during the ageing process. From a series of aliphatic alcohols and aldehydes, propanal was selected as a proper modifier to improve the ageing resistance of FCC slurry oil. The propanal-modified slurry oil possessed more substituted aromatic units and less aromatic hydrogen atoms than other modified slurry oils, thus showing better ageing resistance. With the increase of length of aliphatic chains in modifier, the modified slurry oil contained more and longer alkyl substituent group on aromatics. Compared with the cross-linked oil (slurry oil modified by cross-linking agent), modified slurry oil possessed similar ageing resistance but higher flowing ability. Also, the effect of operation conditions on the kinematic viscosity of modified slurry oil were investigated. Blended with modified slurry oil, the penetration ratio of asphalt product increased from 53.7 to 66.2, which met the standard of 70# paving asphalt. Both the microscopic observations and FT-IR results indicated that modification process effectively reduced the oxidation degree of asphalt product, thus increasing the ageing resistance. Consequently, with aid of this process, high-grade paving asphalt was readily produced from low value oil from downstream products of refinery, instead of the depleting natural asphalt. 相似文献