钢铁工业水处理

现代钢铁工业水处理,归纳起来有三项基本内容:给水、循环冷却水和污水处理。本文结合武钢工业水处理的现状介绍钢铁工业循环冷却水和污水处理的方法、概况。 1.循环冷却水处理随着工业的快速发展,对节约用水和保护环境提出了越来越高的要求。将工业用水循环使用是实现上述两个目标的根本途径。但是,由于水在循环过程当中,温度升高而被浓缩,经冷却塔喷淋后溶     

钢铁工业循环水中氯离子脱除工艺技术探讨

钢铁工业循环冷却水占工业用水量的70％～80％,在工厂中主要用来冷凝蒸汽、冷却产品或设备.面对中国水资源短缺日益严重现象,提高水处理系统循环率、降低吨钢新水指标、提高循环冷却水系统运行的浓缩倍数是重要的节水技术之一.随着浓缩倍数的增加,废水中氯离子不断浓聚,大大加剧了设备及管路遭受晶间腐蚀的危险,轻则影响正常生产及缩短...     

高炉冷却水处理技术比较与探讨

介绍高炉冷却水处理技术的发展和各种冷却水处理技术特点,通过对高炉各种冷却水处理方式进行分析和比较,得出联合软水密闭循环冷却供水方式是最符合现代化大型高炉发展要求。对当今流行于高炉水处理系统中的板式换热器和蒸发式冷却器进行了技术和经济比较。     

基于PROFIBUS现场总线的工业循环冷却水处理系统

介绍了一种基于PROFIBUS 现场总线的工业循环冷却水处理系统,在监控计算机与前端测控模块之间的通信中,使用PROFIBUS现场总线网络技术.基于PC的控制系统是自动化技术发展的一种新的实现方式.详细论述了建立一套以工业PC机及软逻辑(SOFTPLC)控制软件为控制器、以PROFIBUS-DP 现场总线为网络的分布式工业循环冷却水处理系统.     

钢铁企业循环冷却水处理技术浅析

在当前,更加需要进一步企业强化节水减排以及环境保护工作,要求当前的企业结合自身的实际特点采取更加成熟以及完善的技术,同时还应当要更新材料以及装置促使冷却水处理系统得到优化,这样才能够保障循环冷却水处理技术水平得到进一步提高,同时也可以为企业健康、稳定及可持续性发展奠定坚实的基础.文章主要是关于钢铁企业循环冷却水处理技术研究,以供相关专业人士进行参考和借鉴.     

100t电炉连铸工程循环冷却水处理工艺运行实践

本文从设计和运行实践两方面对安钢100t电炉炼钢连铸工程的循环冷却水处理系统作了较详细,客观的介绍。针对各类生产设备冷却要求的差异,采用不同冷却水质和有区别的水处理工艺、设备、设置分用的循环冷却水处理系统,既能够保证炼钢连铸设备和生产安全,又节约用水,保护环境,做到了经济、合理运行。     

钢铁企业循环冷却水处理技术的研究

钢铁企业循环冷却水在炼铁、炼钢连铸、轧钢等主体生产中起着至关重要的作用,通过对循环冷却水处理技术的现状分析,研究了化学药剂处理、静电水处理、磁化处理、膜处理及臭氧处理等技术,进一步研究了循环冷却水处理技术的发展趋势。这对钢铁企业循环冷却水的处理具有一定的借鉴意义。     

钢铁企业的水处理药剂市场及其发展方向

钢铁工业持续发展，促进了与钢铁工业密切相关的水处理药剂市场的形成。笔者归纳了钢铁企业水处理系统典型实例。介绍了钢铁企业水处理系统分类情况、主要钢铁企业水处理总量、药剂参考价格、钢铁企业应用水处理药剂主要种类、钢铁企业水处理药剂发展方向。     

间冷开式循环水系统清洗和预膜处理方法

《工业循环冷却水处理设计规范》规定,间冷开式系统开车前应进行清洗和预膜处理。结合《工业循环冷却水处理设计规范》提出清洗和预膜的重要性,介绍了清洗和预膜流程,着重介绍了具体实施方法。     

中水处理技术在钢铁工业中的应用

结合河南省安阳市西区污水处理厂的中水处理工艺,对中水处理技术在钢铁行业中的应用进行了研究。通过中水处理后的水质分析,探讨中水回用于循环冷却水的技术措施。结果表明,在钢铁工业中推行中水处理技术有利于提高了水的重复利用率,节约了宝贵的水资源。     

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.