焦炉烟道气余热回收利用

通过分析烟气成分、改造原有烟道系统,采用热管+水管组合式余热锅炉,具体热力流程为热管省煤器+水管蒸发器,进行焦炉烟道气余热回收利用,减少了温室气体和酸性气体的排放,年产生蒸汽约9.6万t,收益约1 152万元,每年节约标煤约9 300 t。     

喷射流空气予热器效果好

我厂在冶金部南昌设计研究院的协助下,于今年二月建成一套余热利用装置,其中采用了喷射流空气予热器。该予热器为套管式,装在900℃烟气温度区域中,以予热空气为主,供冶金炉作助燃风予热用。予热器的结构如图所示。     

首台箱体式余热利用装置投运

日前,河南省林州市林丰铝电有限责任公司为抵抗全球金融海啸,战胜有色金属寒冬,采取了节能减排新举措,正式投入运行一台容积为26m^3的箱体式余热利用装置（热交换器）。该箱体式余热利用装置在我国目前的余热利用装置使用中尚属首例,林丰铝电公司成为我国70余家电解铝企业中第一个将铝电解工业废水余热作为生活热源的企业,是我国电解铝企业余热利用的一个成功典范,也为中国的铝电解企业节能减排、发展循环经济、实现环境友好型社会走出了一条新路。     

热管蒸发器加热段管外传热特性模拟分析

针对某印染厂导热油锅炉高温烟气余热未被回收的问题,拟加装热管式蒸汽发生器。通过采用Fluent软件对热管蒸发器烟气侧翅片管段进行传热特性的数值模拟,分析了不同的管间距、翅片间距和翅片高度对传热特性的影响;模拟结果与按经验公式计算的结果基本吻合,误差约为10%;同时可产生0.6 t/h的0.5 MPa蒸汽,经济效益可观。     

偏心径向热管技术在焦炉烟气余热回收中的应用

烟气显热占工业余热资源总量的一半以上,在相对恶劣的烟气热源利用过程中,余热回收装置的使用性能尤为重要。针对烟气系统余热热源的特点,分析了传统重力热管余热回收设备存在的问题,在此基础上提出一种新型偏心径向热管式余热锅炉,并在焦炉烟气余热回收工程中进行了应用研究。结果表明,偏心径向热管式余热锅炉在焦炉烟气余热回收过程中获得了较好的余热回收效益,表现出了较好的防低温腐蚀特性,设备可靠性及使用寿命大大提高,在烟气余热回收领域具有较大的应用价值。     

南京二钢高炉烟道余热利用装置效果好

南京二钢厂职工浴室采用了高炉烟道余热利用装置,解决了职工热水洗澡问题。该余热利用装置,是将炼铁车间100米~3高炉的热风炉所排出的400℃烟气(烟气量为9900标米~3/小时),通过热交换面积为137米~2的锅炉省煤器,加热冷水,排烟温度降到200℃以下,然后由引风机送入烟囱,可将冷水加热到75℃左右。余热利用装置与原有烟道并联安装,对热风炉正常生产无任何影响。在强制通风情况下,每小时供应热水14吨左右。夏季用热水量较少,采用自然通风,可供热水8吨/小时左右。自83年2月投入使用以来,运转顺利,操作简便,可满足三千名职工三班洗澡。     

宝钢2号高炉余热回收装置节能改造实践

简要介绍了分离式热管换热器的工作原理和流程,分析了宝钢2号高炉余热回收装置运行现状,阐述了对其进行整体改造的必要性和紧迫性。介绍此次余热回收装置整体改造主要内容和实施过程,整体扩容更换分离型热管式余热回收装置、共计3套(空气、煤气、烟气)换热器。每套换热器换热片由原来的8组增加到12组,同时更换3个烟气系统的阀门。改造历时78天,比计划工期大大提前。余热回收换热效果显著改善,达到了预期的目标。     

回收工业余热的碳钢—水热管换热器的研制

热管是一种高效能的传热元件,七十年代初,随着世界性的能源短缺,热管技术开始应用于能源工程,我国自八十年代初起,开始将这一技术应用于节能,特别是余热应用领域。 本试验的目的是研制一种适用于小型工业锅炉上使用的碳钢-水两相热虹吸式热管省煤器。     

烟化炉余热利用的研究与设计

分析了烟化炉的烟气特性及其余热利用装置的要求,说明了余热利用的设计原则,对韶关冶炼厂二系统烟化炉余热利用装置的设计进行了介绍。     

石钢10T/h锅炉热管换热器的设计及方案选择

我省冶金企业占全省能耗总量的18％,余热资源丰富,节能潜力很大。我们从1983年开始了应用热管换热器回收工业锅炉余热的研究,于1984年3月应用于石家庄钢铁厂SZP10—13型双汽包纵置式水管锅炉上。经一段时间运行于1985年2月通过了省科委组织的鉴定,认为该系统布局合理、结构简单、占地面积小、使用维修方便,节能效果与经济效益显著,可     

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.