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对我厂15万t/a半再生重整装置扩容至40万t/a改造方案从主要技术措施和设备利旧两方面进行探讨,指出改造工作不仅要提高原有设备的利旧率,又要使改造后的装置具有较高的技术含量,以适应我厂今后的发展。 相似文献
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本文介绍了扬子石化公司芳烃厂105万t/a连续重整装置改造成139万t/a连续重整及其配套的55.37万t/a预加的氢装置改造成70.2万t/a的改造内容,改造后的运转情况。 相似文献
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论证了Ⅱ套加氢精制装置在原流程不作改动的前提下,如何最大限度地利用现有的设备或对现有设备进行改造,来满足柴油加工量由40万t/a扩至60万t/a的需要。 相似文献
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镇海炼油化工股份有限公司“九五”计划800万t/a炼油改造,至1999年,公司人武部一次加工能力将达到1600万t/a。在2003年前将对30万t/a固定床、半再生式催化重整装置进行扩能改造,为此对改造的工艺技术进行可行性分析,并提出对装置改造的部分建议。 相似文献
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结合大庆30万t/a乙烯装置扩建为35万t/a工程中裂解气离心式压缩机的扩容改造,介绍了叶轮抗硫化物应力腐蚀的一些措施。 相似文献
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本文介绍了上海石化40万t/a连续重整改造为50万t/a的改造内容,并介绍了改造后超负荷试验情况,通过超负荷试验找出了装置新的瓶颈。 相似文献
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分析了离心式压缩机扩容改造几种途径的特点。重点介绍大庆石油化工总厂30万t/a乙烯装置扩改建为35万t/a工程中裂解气离心式压缩机的扩容改造。 相似文献
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本文对锦西炼化总厂15万t/a重整装置的现状进行了介绍,提出了扩容改造成30万t/a重整装置的设计原则及技术方案。 相似文献
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简述了国内外银催化剂的发展及其对EO/EG工业生产发展的促进作用。银催化剂的发展,以提高选择性为中心经历了三个阶段。北京燕化公司研究院研究开发的YS-系列银催化剂成功地用于工业EO/EG生产装置,在提高选择性方面取得了新的进展。从催化剂活性,选择和稳定性综合考虑提出了EO/EG装置银催化剂的选型原则。 相似文献
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依托某环氧乙烷/乙二醇(EO/EG)装置转产改造项目,首次实现了通过新增环氧乙烷(EO)精制系统与原EO精制系统串联操作,使反应器当量环氧乙烷(EOE)能力的80%以上用于生产精制环氧乙烷(PEO)产品,实现乙二醇转产环氧乙烷。新增EO精制塔采用新型高效塔盘以满足扩能需求,采用优化的加热控制系统适应更宽的进料组成,并开发了集成的排醛系统以控制新增EO精制塔产品中的醛含量。 相似文献
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分析了环氧乙烷,乙二醇装置工艺系统中有机酸生成的原因.指出在银催化剂作用下,乙烯氧化过程有机酸生成主要成分是甲酸和乙酸,银催化剂不是影响氧化反应器出口醛含量的主要因素;杂质、温度等对反应器出口气中的醛含量有重要影响,也直接影响到装置前系统的有机酸含量;乙二醇后系统中有机酸的增加仅取决于两级吸收及解析工艺的稳定操作。 相似文献
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介绍了新型多溢流复合斜孔塔板的特点,用Aspeen Plus模拟软件对原环氧乙烷吸收塔(EO塔)进行工艺模拟,提出旧塔改造方案。该方案经水力学公式核算的结果显示,改造后的EO塔处理能力增加了1.3倍,满足了装置扩能改造的要求。 相似文献
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《Food Control》2014
In this study efficacy of near neutral and alkaline pH electrolyzed oxidizing waters to reduce aerobic plate counts (AC) and Enterobacteriaceae (EC) from uninoculated fresh cattle hides and Escherichia coli O157:H7 and Salmonella Typhimurium DT 104 from inoculated hides were determined. Fresh hides were cut in to 15 by 20 cm pieces and subjected to a total of eight different treatment solutions; near neutral pH EO water (NEW-pH 6.5 at room temperature, 150 mg/L available chlorine), alkaline pH EO water (AEO-pH 11.6 at room temperature), hot alkaline pH EO water at 43 °C (HAEO-pH 11.60), alkaline pH EO water spray followed by 150 mg/L available chlorine containing near neutral pH EO water spray (A-NEW-both at room temperature), Blitz™ (PAA, pH 3.02 at room temperature), 5% lactic acid (LA, pH 2.04 at room temperature), deionized water (W) and no treatment (Control). For each treatment, 60 ml treatment solution was sprayed on hide using a hand held sprayer. Similar treatment protocol was employed to treat hide pieces inoculated with E. coli O157:H7 and S. Typhimurium DT 104. Five percent lactic acid spray treatment was found to be the most effective treatment and achieved 2.77, 2.74, 2.75 and 2.98 log CFU/cm2 of AC, EC, E. coli O157:H7 and S. Typhimurium DT 104 reductions, respectively. All EO water treatments were equally effective in reducing all target microorganisms, except E. coli O157:H7. HAEO and A-NEW treatments yielded significant reduction of E. coli O157:H7 compared to other EO water treatments. These results indicate that various EO water treatments could become viable options to reduce pathogens on hide during slaughter. 相似文献
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《Food Control》2014
Stored products may be contaminated by pathogenic fungi such as Fusarium, Aspergillus and Penicillum. Fumigation with plant essential oil (EO) and irradiation treatment are options to control spoilage organisms. Basil essential oil and irradiation were tested alone and in combination for their antifungal effects in rice. Minimum Inhibitory Concentration (MIC) of basil EO was found to be 0.1% (v/v) against Aspergillus niger and Penicillium chrysogenum after 48 h. Radiosensitization of A. niger and P. chrysogenum in presence of 1% or 2% (v/v) basil EO was evaluated in vitro and in situ. At 1 and 2% of basil EO, the in vitro D10 value was 0.43 and 0.31 kGy respectively for A. niger and 0.44 and 0.34 kGy respectively for P. chrysogenum. In inoculated rice, D10 values for controls (sample without EO) were 0.67 and 0.63 kGy for A. niger and P. chrysogenum respectively, and the values were decreased at higher EO concentrations. For A. niger, a 2% (v/wt) basil EO alone caused a 0.42 to 1.18 log reduction on days 1 and 14 respectively, whereas treatment with 2 kGy radiation alone caused a 2.18 log reduction. The combined treatments resulted in a 4.6 log reduction of A. niger after 14 days of storage. For P. chrysogenum, 2% basil EO alone caused a 0.76 and a 1.12 log reduction on days 1 and 14 respectively, whereas a 2 kGy radiation dose caused a 2.41 log reduction. The combined treatments resulted in a 5.0 log reduction of P. chrysogenum after 14 days of storage. The findings demonstrated the potential of basil EO as antifungal agent and its efficacy to increase the radiosensitivity of A. niger and P. chrysogenum during irradiation treatment. 相似文献
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研究了杂多酸催化无水乙醇和环氧乙烷(EO)制备乙醇乙醚的醚化反应,考察了不同种类的杂多酸以及醚化反应工艺条件对反应活性和选择性的影响.结果表明,PW_(12)催化剂的反应活性高、反应温度低、选择性好,当用PW_(12)作催化剂,乙醇与环氧化乙烷之比为3.0(mol),反应温度45℃,反应时间1h时,转化率和选择性均超过97%. 相似文献