制氧站循环冷却水全系统除垢清洗及水质稳定

介绍了制氧站循环冷却水系统除垢清洗及水质稳定技术处理。经过除垢清洗及投加CW2105水质稳定剂、CW701杀菌灭藻剂后,解决了制氧站循环冷却水全系统因水质失稳结垢、菌藻滋生,导致制氧站循环水结垢造成制氧设备超温报警的问题。投加水质稳定剂后循环冷却水系统运行稳定,因结垢而影响制氧站安全生产运行的问题得到了有效的解决。     

空压机冷却循环水水质稳定处理

对舞钢空压机冷却循环水水质进行了分析，探讨了循环水系统结垢腐蚀机理。实验确定了水处理药剂及投加药量，解决了水质较差的问题。     

制氧循环水系统水质稳定新技术应用总结

1水处理系统现状及存在问题制氧系统是炼钢厂的心脏,其运行不正常会影响到炼钢厂乃至全厂的正常生产,因此,作为制氧的冷却水供应更要优质安全保障供给。循环水处理技术源于6K制氧机的有机膦系列水质稳定技术。1.5万制氧机组投产前循环水系统运行正常,未有结垢腐蚀现象,空冷塔生产运行也正常。自1998年1.5万制氧机投产以来,制氧工艺中的换热设备未见结垢,仅在填料空冷塔及上水泵过滤网中有垢产生。至2001年8月底出现空冷塔内进出口压差增高,影响制氧的正常生产,经查塔内有松软颗粒性垢样排出。针对制氧系统存在的问题,水电厂对相关制氧单位…     

水质稳定剂在高炉炉体循环水系统的应用

针对高炉炉体循环水系统的腐蚀与结垢倾向,通过实验找出了水质稳定药剂,实际生产运行结果表明循环水系统结垢附着速度和腐蚀速度大大低于国家标准,对运行水质没有明显影响.     

空冷塔低温结垢原因分析及处理

分析了制氧机空气预冷系统低温结垢的原因,通过在低温水泵入口直接加阻垢缓蚀剂,解决了制氧空冷塔低温结垢的问题。     

制氧机预冷系统改造

介绍了制氧机循环水造成预冷系统设备结垢、堵塞的现象和原因，通过对预冷水系统独立设置、水系统设备防腐、自动控制等一系列改造，消除了故障，提高了设备运行的安全性和稳定性。     

电化学循环水水质稳定处理技术的原理及应用

电化学循环水水质稳定处理技术的缓蚀、阻垢、杀菌灭藻效果好,应用这种技术的循环水系统不需要投加任何化学药剂,且强制排污水量少,不仅可节约药剂费和补水费,而且有很好的节能减排和环境保护效果。讨论了电化学循环水水质稳定处理技术的基本原理并结合其在某催化公司循环水系统节能改造工程中的应用,介绍了电化学循环水系统的设计、运行控制方法,运行结果表明,电化学水处理技术比传统化学法具有更好的处理效果,排污量减少了约76%,大大节省了水资源和运行成本,具有很好的技术优势和应用前景。     

用PLC实现两台水泵的互投

１概述制氧车间循环水系统是６５００ｍ３／ｈ制氧机和１００００ｍ３／ｈ制氧机空分流程的主要配套设备，担负着两套空分设备的冷却和空气预冷的重任。而冷水泵系统是冷却水在整个循环水回路循环的主要动力设备。因此，一旦冷水泵系统发生故障，就不能结合整个空分系统提供冷却水，不仅空气预冷系统的两级空气冷却无法实现扰乱空分工况，而且空分设备也会因运行温度过高而保护跳闸，整个空分装置就会瘫痪，影响氧气的正常生产。循环水系统中原有两套冷水泵系统，但在电气上设有自投的功能，即当工作泵出现故障时，需人工开启备用泵，时间往…     

转炉除尘循环水水质阻垢剂的研究与实践

针对炼钢厂转炉循环水处理效果差、除尘系统结垢严重的问题,通过对除尘系统不同部位水样分析,除尘风机叶轮、除湿器垢样的机理分析及静态下阻垢试验,筛选出对铁垢、碳酸钙垢、磷酸钙具有较好效果的阻垢剂PDC9323型和PDC9324型及对悬浮物有较好絮凝效果的水处理絮凝剂AP1120,有效缓解了系统结垢问题,风机叶轮结垢速率由原先的0.3 mm/月降到0.005 7 mm/月,循环水中的悬浮物由150×10-6~200×10-6降到80×10-6左右。     

焦化循环水缓蚀阻垢药剂的应用

在工业中水用于邯宝焦化厂循环水补充水的系统中，由于C1^-、SO4^2-含量高，水处理大都采用低浓缩倍率运行，系统腐蚀结垢仍很严重。采用奥博公司的水处理药剂和投加方案后，实行了高倍率运行，不仅节约了用水，而且锈垢、泥垢逐渐脱落，提高了换热效果，保证了生产的正常运行。     

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.