天钢烧结工序余热回收综合利用系统研究

以天津钢铁集团有限公司的烧结工序为研究对象,分析了天钢的265 m~2+360 m~2烧结余热回收综合利用项目,介绍了余热锅炉系统和烟气回收系统,以及余热锅炉的设置与选择。研究结果表明,天钢集团的烧结工序余热回收综合利用项目其节能环保效果显著。     

烧结余热发电技术及系统的优化分析

简要介绍了烧结余热发电技术及系统流程,提出了以余热有效利用率来评价烧结余热发电系统的性能.通过对不同工况下烧结余热发电系统的发电量进行理论计算和比较,同时考虑生产设备及运行限制因素,对烧结余热烟气参数进行了优化选取.通过建立烧结余热发电双压系统的热力模型,计算分析了主蒸汽温度、主蒸汽压力、低压蒸汽温度和压力及其选取对系统余热有效利用率的影响和变化规律,为烧结余热发电系统的优化设计与运行提供了较科学的依据.     

烧结机余热发电DCS监控系统配置及功能

烧结机炉料经烧结后在冷却过程中产生大量的高温烟气,通过烧结余热发电可以提高生产工艺流程的合理性,减少烟气热、尘排放,减轻对大气环境的影响,增加电力生产,提高能源综合利用率,符合国家建立节能型社会、促进循环经济发展的总方针。本文针对带冷式烧结机的系统特点,依据具体工程实践,详细介绍了烧结余热发电DCS监控系统的配置及功能,从DCS监控系统组成、DCS软硬件配置以及系统主要功能等几方面介绍了烧结余热发电的热工监控系统设计特点,并通过对工程运行结果的分析指出该系统的特点,为烧结余热发电DCS监控系统的设计和应用提供了实用的工程实践经验。     

宝钢烧结冷却废气余热回收现状与潜力

阐述了宝钢股份烧结工序冷却废气余热回收的发展和现状,介绍了宝钢烧结实行废气余热回收的有效措施.为最大限度回收废气余热,降低烧结工序能耗,分析了进一步提高烧结废气余热回收水平的潜力,提出了相应技术思路.     

冶金余热高效综合利用技术

介绍了冶金企业各工序余热资源高效综合利用技术,包括烧结余热及干熄焦余热高效利用、高炉炉顶煤气余压发电及饱和蒸汽发电技术等,建议大力发展余热回收系统集成系统及冶金渣有压热闷技术,扩大余热利用和余热资源范围。     

大型烧结设备余热整体利用方案

根据烧结余热特点和余热品质分析，提出了将余热进行分段回收、有效利用、优化用能的技术方案，即同时采用余热发电和热风点火、热风烧结以及料矿加热等多种有效的回收形式对烧结余热加以综合利用的整体解决方法，可将大型烧结设备产生的余热最大限度地加以回收利用。     

烧结冷却余热发电系统的热力学模型及主蒸汽参数的优化选择

总结了国内外烧结余热发电技术及烧结余热资源的特性,并据此建立了烧结余热发电系统热力学模型,分析了主蒸汽参数与余热发电系统最大发电能力的关系,以及影响系统发电功率的主要因素,得出了最佳的主蒸汽参数.     

烧结冷却机双压余热发电系统参数优化

采用双压饱和蒸汽发电系统,可解决烧结余热发电系统中热源不稳定的问题.本文以某厂520m2烧结机环冷余热发电系统为例,就双压饱和蒸汽发电系统的压力选择对其余热利用率和发电量的影响进行了分析,以期为烧结余热发电系统的优化设计提供理论依据.     

冶金企业烧结冷却机余热发电技术开发及应用

烧结冷却机余热发电技术是利用烧结冷却机中低温的废气通过余热锅炉产生蒸汽,来推动汽轮机组做功发电.本文对烧结冷却机纯低温余热发电热力工艺系统、热力参数等特点及发电能力进行了探讨、分析、比较,通过工程实例及结论,为合理选择余热发电技术及提高发电能力提供参考.     

烧结余热回收利用途径探讨

介绍了国内外烧结余热利用情况.以实际工程为例分析探讨了余热发电的社会效益、环境效益和经济效益,以及烧结余热回收利用的途径,并提出了提高烧结回收余热的技术措施.     

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.     

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。     

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.     

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.