共查询到18条相似文献,搜索用时 109 毫秒
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三钢焦化厂捣固焦投产后,配煤结构和细度发生改变,并且高压氨水压力提高,导致焦油氨水中夹带的煤粉增多,降低了焦油氨水分离槽中的焦油与氨水的分离效果,分离后焦油中夹带水分较多。原有的焦氨分离运行管理及库区操作管理已经无法适应目前的生产工艺现状,出厂焦油的水分时常超标,对焦油产品的日常销售造成了较大的影响。通过分析导致焦油水分超标的各方面因素,从创新焦氨分离运行管理制度及库区操作管理制度入手,通过优化生产工艺操作制度,降低焦油中的水分含量,提高焦油产品的合格率。 相似文献
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针对传统蒸馏-茹克夫法分析焦油三混油的弊端,开发了气相色谱分析法。通过反复试验,选择了气相色谱分析操作条件、制定色谱分析参数、确定色谱控制指标。该方法改变了在焦油加工生产中控制馏分温度的粗放调节方式,采用了控制馏分中组分含量的精细调节方式,能更加直观、便捷、快速、精确地指导焦油加工生产,稳定了焦油生产操作,提高了工业萘产品的收率及一次合格率。 相似文献
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通过对焦油蒸馏工艺参数进行优化、控制结晶后物料温度、促进废油的再利用、操作标准化及改进技术管理等措施,2010年至2011年,粗蒽平均产率由1.52%提高到1.96%。 相似文献
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以秸秆热解产生的焦油为原料,在固定床反应器实验台上进行了催化裂解实验,研究了反应温度和催化剂种类对生物质焦油的裂解反应产物——二次焦油成分的影响规律.在高铝砖作为催化剂作用下,随着温度的升高,二次焦油构成有芳香化的趋势,多环芳烃的种类和含量都在增加.反应温度的提高有利于焦油的深度转化,二次焦油产率降低;但是高温下生成的二次焦油芳化程度更高,更容易引起催化剂积炭失活.当反应温度为900℃时,碱性催化剂白云石和石灰岩作用下二次焦油成分相似,以复杂的大分子环烃为主,而且焦油成分种类减少到10种左右;酸性催化剂高铝砖作用下焦油成分仍然很复杂,有将近30种,除了含有大分子环烃外,还含有部分石蜡烃,芳香族种类很多,多以双环、三环以及四环的形式存在. 相似文献
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因采用轻质焦油代替洗油洗萘,部分轻质焦油带到蒸氨塔,引起蒸氨塔堵塞,导致处理能力和效率降低,焦化厂废水排出口各污染因子浓度超标。为解决这个问题,焦化厂试用新洗油清洗蒸氨塔,效果较好。 相似文献
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Lingxin Kong Bin Yang Yifu Li Baoqiang Xu Dachun Liu Guobin Jia 《Metallurgical and Materials Transactions B》2012,43(6):1649-1656
The activity coefficients of components of the Pb-Sn binary alloy system were calculated based on the molecular interaction volume model (MIVM). A significant advantage of this model lies in its ability to predict the thermodynamic properties of liquid alloys using only two binary infinite activity coefficients. Based on the MIVM, the vapor-liquid phase equilibrium of the Pb-Sn alloy system in vacuum distillation has been predicted using the activity coefficients of Pb and Sn. The results showed that the content of tin in the vapor phase was 0.008?wt?pct, while in the liquid phase, it was 83?wt?pct at 1173?K (900?°C); it reached 0.022?wt?pct in the vapor phase, while in the liquid phase, it was 92?wt?pct at 1223?K (950?°C); and it was 0.052?wt?pct in the vapor phase, while in the liquid phase, it was 97.88?wt?pct at 1273?K (1000?°C). The content of tin in the vapor phase increased with the distillation temperature increasing. Experimental investigations into the separation of Pb and Sn from the Pb-Sn alloy by vacuum distillation were carried out for the proper interpretation of the results of the model. The influence of the distillation time (20 to 80?minutes) and the distillation temperatures of 1173?K, 1223?K, and 1273?K (900?°C, 950?°C, and 1000?°C) on the separating effect was also studied. The experimental results showed that the content of tin in the vapor phase was 0.085?wt?pct, while in liquid phase, it was 83?wt?pct under the operational conditions of distillation temperature of 1173?K (900?°C), evaporation time of 20?minutes, and chamber pressure of 20?Pa; it reached 0.18?wt?pct in the vapor phase, while in the liquid phase, it was 92?wt?pct at 1223?K (950?°C), 20?minutes, and 20?Pa; and it was 0.35?wt?pct in the vapor phase, while in the liquid phase, it was 97.88?wt?pct at 1273?K (1000?°C), 20?minutes, and 20?Pa. In all these experiments, it was observed that the content of tin in the vapor phase increased as the distillation time and temperatures were increased. The experimental results are in good agreement with the predicted values of the MIVM for the Pb-Sn binary system. 相似文献