运用系统工程方法搞好余热回收利用的实践

论述了西宁钢厂运用系统工程方法搞好余热回收利用的情况,内容包括:以系统节能观点提高职工对余热回收利用的认识;开展系统分析,制定最佳运行方式;注重余热回收利用的系统节能效益;着眼全系统,扩大余热回收利用的范围。     

攀长特公司70t电炉余热回收

以攀钢集团江油长城特殊钢有限公司连铸项目余热回收工程为例,研究了攀长特公司70t电炉余热资源回收利用系统采用的节能技术、节能设备和节能方法,在此基础上计算了该工程所产生的社会和经济效益。通过攀长特公司70t电炉余热回收工程所产生的经济效益及社会效益,为攀长特公司节能降耗、提高产品竞争力指明了方向。     

大幅度节能的新型燃烧器系统

由于燃料价格下跌,人们对节能效果一般的措施已不再大力宣传了。然而节能研究却更加深入,目前有一种可节能40～50%的方法已成功地在工业的高温处理中应用。这种可大量节能的新方法是使用一种带有热回收床的燃烧器,使由热处理炉、窑或辐射管加热器排出的烟气通过热回收床进行余热回收。这套系统不能同时做为燃烧器和余热回收装置。因此它必须成对安装,每20s相互换向一次。     

关于客房排气的热回收系统

阐述热回收系统节能的重要性，分析热回收装置的特点，通过实例的剖析，强调系统配置的合理性，指出建筑与空调的节能措施要统一。     

蒸汽系统节能的喷射技术

论述了以喷射技术为基础的蒸汽系统节能设备，可实现蒸汽升压，闪蒸汽回收，节能降压，凝结水汽水回收，汽轮机压力匹配等用途。节能率20％～30％。该技术广泛应用于大量使用蒸汽的行业，为企业创造丰厚的节能效益。     

武钢降低炼铁系统能源消耗的实践

分析了武钢炼铁系统的能源消耗状况,介绍了武钢降低炼铁系统能源消耗的主要措施:开展节能技术进步,降低燃料和动力消耗,加强余热余能回收,以及不断强化节能管理工作．     

梅钢应用余能回收技术的实践与探索

余能回收是钢铁企业当前节能工作的重点方向之一。首先从系统配置、工艺流程和应用效果三个方面,介绍了梅钢应用先进余能回收技术的经验;然后介绍了梅钢近来在低品位余能资源的回收利用方面开展的积极探索、初步取得的效果。实践表明,梅钢余能回收技术总体上运行稳定、节能效果良好,为促进钢铁行业余热资源的挖掘利用提供了示范。     

回转窑余热回收系统的节能改进

本文针对回转窑余热回收系统在生产实际中存在的不足，结合节能的要求，提出并实施了余热回收系统引风机、烟道蝶阀和分汽系统的技术改进，达到了节约电、水、汽的目的。     

变频器在氢气回收系统压缩机上的应用

叙述了变频器在氢气压缩机上的应用,介绍了氢气回收系统改造过程的设计思想,分析了几种常见大功率电机启动方式的优缺点。实践证明,增设变频器后氢气回收系统稳定性和可靠性方面均有所很大改善,系统节能效果明显。     

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。     

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。     

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.     

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)     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.