共查询到20条相似文献,搜索用时 46 毫秒
1.
2.
扬子650kt/a乙烯装置改造势在必行。要在占地狭小的区域中完成一个规模经济,效能优异的扩容改造,必须反复筛选改造方案,以满足改造的要求,在本轮改造的初期,技术人员经过反复论证与技术交流,筛选并采用了颇为合理的改造方案。该方案充分依托老厂,符合少投入,多产出的原则,形成经济规模,增强整体竞争实力;改造方案的筛选到因地制宜,有利于节省投资,有利于集中统一管理,有利于组织生产;改造方案采用先进与成熟的技术,确保开车成功。 相似文献
3.
4.
介绍了对抚顺石化公司腈纶化工厂后纺车间空调系统拟定改造方案,对拟定改造方案的可行性分析,以及分析结论和改造后的效果。 相似文献
5.
针对新疆泽普石化厂常压、重整联合装置中的重整原料脱水塔生产中出现的问题,经过工艺计算分析,找出了存在问题的原因,提出了可行的改造方案.改造后该原料脱水塔一直操作正常,证明了改造方案是正确的,该改造方案可为同类装置的改造提供借鉴. 相似文献
6.
7.
8.
对PTA二装置HT701塔的改造方案进行了分析和比较,提出了合适的改造方案,通过改造,HT701塔完全满足装置的需要,同时,为类似PTA装置溶剂脱水塔的改造提供了参考。 相似文献
9.
殷云飞 《化学工业与工程技术》2001,22(1):31-33
针对南化公司供氢、用氢现状 ,结合老厂改造及今后的发展 ,充分利用现有资源 ,提出了 4种氢气改造技术方案 ,并进行了分析比较。认为结合老厂合成氨改造联合制氢为南化公司氢气改造的首选方案。 相似文献
10.
11.
固相吸附剂在溶液中吸附特性的研究 总被引:3,自引:0,他引:3
研究了固相吸附剂活性炭在醋酸溶液和亚甲基蓝溶液中的吸附特性,在吸附质浓度较低时,吸附属单分子层吸附,用Langmuir吸附方程式对吸附作用进行了数学表征,并利用溶液吸附法测定了活性炭的比表面积。 相似文献
12.
13.
14.
首先介绍了国内外复合材料行业使用的填料氢氧化铝的发展趋势;其次介绍了带式真空过滤机在国内外发展及应用的概况,并对其工作原理做了陈述。最后叙述了其在种分玛瑙生产线上的应用情况、存在问题及解决方法。 相似文献
15.
16.
聚酯短纤维含量对其增强橡胶复合材料硫化性能的影响 总被引:1,自引:0,他引:1
该文研究聚酯短纤维用量及硫化温度的不同对短纤维橡胶基复合材料(SFRC)硫化特性的影响。结果表明,随着聚酯短纤维用量的增大,复舍材料的Mm呈增加趋势,t90逐渐缩短;随着短纤维含量的增加,硫化平坦性变差,热硫化时间和硫化平坦期很短,此后交联键及链段的热裂解反应剧烈,复合材料性能迅速下降,最大转距和最小转距之差呈上升趋势;随着硫化温度的升高,复合材料的硫化速度加快,焦烧时间缩短,硫化平坦性降低;硫化温度宜选在130℃左右;通过电子扫描显微镜观察,复合材料与短纤维的粘着情况在硫化前后有较大不同,随着纤维用量的增加,纤维和基体的粘着性逐渐降低。 相似文献
17.
Anaerobic degradation: the effect of the combined treatment of substrates on the refractory fraction
Gema Fueyo Antonio Gutierrez Jos Berrueta 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2002,77(8):910-916
The anaerobic digestion of landfill leachates mixed with domestic sewage was studied using a batch reactor at laboratory scale. Batch assays were carried out with different proportions of leachate in the feed: 100, 70, 50 and 30% by volume, with and without adjustment of pH, in order to determine the percentage of acidification and methanization, COD removal, anaerobic biodegradability and biomass growth yield. The main effect of the mixing with sewage was a synergistic improvement of the anaerobic treatment of leachates, but in different ways; the greatest improvement in COD removal was obtained when the proportion of leachate in the feed was 70%, but the highest degree of anaerobic biodegradability was obtained with 30% of leachate in the feed. The kinetics of these assays was studied and the experimental data were fitted to a modification of the equation of Chen and Hashimoto. A new concept of ‘non‐biodegradable fraction’ is proposed. © 2002 Society of Chemical Industry 相似文献
18.
19.
针对煤气预热器阻力增高的现象,分析了原因并提出了改进措施。通过控制脱硫液盐含量和煤气夹带量、降低预热器温度及更换新型不锈钢预热器等措施,解决了预热器阻力高问题。 相似文献
20.
The half-life of the stearoyl-CoA desaturase was determined by using houseflies injected with puromycin. The LD50 for puromycin was determined to be 1.55 micrograms/mg body wt for both sexes. By following the decay in specific activity of the desaturase after puromycin injection, the half-life of this enzyme in 4-day-old females was calculated to be 9.35 hr, while in 1-day-old females it was 3.38 hr. The inhibition curve for the 3-day-old males never reached 100%, and a biphasic curve was observed. The early phase resulted in a half-life of the desaturase of 2.41 hr, while the latter phase had a half-life of 8.45 hr. In general, it appeared that the half-life of the desaturase increased with age in either sex. Studies on the distribution of desaturase activity within the housefly showed that most of the activity was present in the integument; however, in the female, the onset of ovarian development seemed to shift the distribution of desaturase from the integument, towards the internal tissues. In the male, there appeared to be equal amounts of desaturase in integument and the fat body plus internal tissues at day 2, but by day 5 most of the activity was associated with the integument. The high specific activity and high percentage of total desaturase activity associated with integument coupled with the shift of distribution of desaturase in females during the onset of ovarian development may be indicative of a close correlation of the desaturase with alkene synthesis and possibly sex pheromone production. 相似文献