焦炉装煤除尘系统存在的问题及改进措施

莱钢焦化厂6m顶装煤焦炉采用干式布袋除尘地面站除尘系统,因加煤车导套变形、烟气管道存在漏点,布袋除尘器本体设备损坏、变形等问题,装煤除尘效果较差。通过更换除尘系统设备,提高除尘系统气密性,调整除尘系统运行方式及参数等,使管线阻力降低200Pa,装煤除尘尾气达到排放标准要求。     

转炉一次除尘系统的改造实践

随着转炉的扩容改造,传统的转炉一次除尘系统已经不能满足现有转炉的除尘要求。因此,新型转炉除尘系统—洗涤塔-环缝式除尘系统应运而生。洗涤塔-环缝式除尘系统具有系统阻力小,除尘效果好的特点,在唐山国丰钢铁有限公司得到了很好的应用,是值得推广应用的先进技术。     

首钢长钢九高炉区域降低氮气消耗生产实践

高炉除尘系统是首钢长钢炼铁工序的能耗大户,在除尘作业区域内,通过对干法布袋除尘系统和罐位除尘系统设备及工艺进行小改造,最终实现了九高炉除尘系统氮气能源消耗量的大幅降低,为生铁低成本冶炼起到积极作用。     

转炉二次除尘新技术在改造项目中的应用

介绍了转炉二次除尘新技术的研发背景,结合宝钢二炼钢转炉除尘系统改造项目介绍了转炉二次除尘新技术在改造项目中的应用情况。从除尘风量的确定、集尘罩的形式、管路系统的布置以及转炉三次除尘等方面进行了具体分析,对比传统转炉二次除尘系统的不足,提出了转炉二次除尘新技术的优势,为大中型转炉二次除尘系统在线改造提供参考。     

除尘系统评估模式的建立与应用

以电厂除尘系统为例,重点讨论如何建立一套除尘系统的评估模式。所建模式是在对除尘系统全面考察了解的基础之上,针对除尘系统存在的问题,参照国家有关标准和规范,对除尘系统各个环节基本运行参数进行反复测试,分析研究系统的运行参数,并与原始设计参数进行比较,找出存在的问题及原因,对除尘系统的运行情况进行综合诊断和评定,并提出整改建议和方案。     

本钢6号高炉出铁场除尘系统的改进

介绍了本钢6号高炉出铁场的除尘参数、除尘系统及设备的特点.结合6号高炉除尘系统在实际运行中存在的问题,根据现场实际需要对铁场主铁沟上方移动罩的结构形式、除尘系统各吸尘点阀门的控制方式、除尘卸灰和输灰循环PLC控制系统进行试验改进,改善了出铁场除尘系统除尘效果.     

电解质破碎系统除尘效果不佳的深入分析

针对东兴铝业90万t电解质破碎系统除尘设施除尘效果不佳的现状,从除尘系统风量设计不足、系统管网运行阻力大于设计值,工艺设备密闭不严密,局部除尘管道布置和施工欠合理,现场除尘管道施工未严格遵循图纸设计和施工规范等方面进行了深入分析,为下一步作业区优化改造除尘系统、提升粉尘治理能力提供了依据。     

转炉干法除尘自动化检测与控制浅析

转炉干法除尘是现阶段应用较广的一种除尘方法,应用转炉干法除尘可以达到很好的除尘效果。本文针对现阶段应用较多的西钢炼钢厂65t转炉干法除尘自动控制系统进行分析,对该系统的组成、生产工艺以及主要控制系统进行了详细的分析。     

昆钢50t转炉一次除尘改造实践与效果

对昆钢50t转炉一次除尘系统存在的问题进行分析．并对系统的除尘风机、除尘风管进行改造。增加有气雾喷枪的脱水塔,使系统的除尘效果得到改善。     

转炉区域三次除尘系统的改造

天津天钢联合特钢公司炼钢厂转炉区域现有除尘系统已无法满足环保要求,需要增建一套布袋除尘系统,将目前转炉区域所有无组织排放的粉尘进行集中收集,实现颗粒物达标排放。介绍了原有除尘系统的构成和缺点,对改造后除尘系统的技术要求、工艺流程、电控系统、除尘风机、气力输灰系统等。改造后的系统使用效果良好。     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.