低频声波清灰装置在煤气加压机叶轮清灰中的应用

济钢高炉煤气经湿法除尘后的煤气中部分粉尘附着于煤气加压机叶轮与机壳之上。人工对壳体和叶轮挂灰进行清理费时、费力、影响生产。经采用低频声波清灰装置,减少了检修和维护的费用。     

氮气脉冲清灰袋式除尘器在高炉煤气上的应用

目前高炉袋式除尘器基本采用煤气加压反吹清灰系统,氮气脉冲反吹清灰系统用于大中型高炉煤气干法除尘尚处于试验阶段。对比了煤气加压反吹除尘器与氮气脉冲反吹除尘器的优缺点。展望了氮气脉冲反吹清灰系统的应用前景。     

高炉煤气高速外滤式脉冲清灰布 袋除尘的应用

高速外滤式脉冲清灰布袋除尘工艺用于高炉煤气的除尘 ,因其过滤风速高 ,清灰效果好 ,布袋寿命长 ,除尘效率高 ,改造投资少 ,见效快 ,优于的传统的内滤式加压反吹布袋除尘工艺 ,适合于现有内滤式布袋除尘器的改造 ,具有显著的环境效益、经济效益 .文章着重介绍该工艺设备的性能特点及系统的改造及应用状况 ,并对运行效果进行分析     

柳钢高炉净煤气反吹清灰工艺改造实践

针对柳钢高炉煤气干法除尘生产中氮气脉冲反吹清灰存在的诸多问题,对系统设备和工艺进行了改进,采用净煤气反吹清灰工艺后,取得了良好的经济效益,实现了节能、降耗的目的,为冶金行业高炉除尘改造提供借鉴。     

大型高炉煤气干法除尘脉冲清灰研究

从高炉煤气及其粉尘所具有的特性出发,系统地分析研究了影响高炉煤气干法布袋除尘脉冲清灰的各种影响因素,介绍了脉冲喷吹实验研究情况和特大型高炉实际工程设计参数,为大型高炉煤气干法除尘技术的发展与应用提供了借鉴。     

大型高炉煤气干法除尘脉冲清灰研究

从高炉煤气及其粉尘所具有的特性出发,系统地分析研究了影响高炉煤气干法布袋除尘脉冲清灰的各种影响因素,介绍了脉冲喷吹实验研究情况和特大型高炉实际工程设计参数,为大型高炉煤气干法除尘技术的发展与应用提供了借鉴。     

布袋除尘器清灰系统的探讨

1前言 脉喷型袋式除尘器，由于其清灰力度大、结构紧凑，在化工和钢铁行业得到了广泛的应用。涟钢炼铁厂多处采用袋式除尘器，例如小高炉槽下除尘、布袋车间的煤气除尘等。     

湿法电除尘器清灰燃烧器的试制

目前，我国钢铁企业应用在高炉煤气净化生产工艺上的除尘设备多为湿法（包括串联文氏管和塔后文管、板式电除尘器、管式电除尘器）和干法（包括布袋除尘器、干式电除尘器）两种。以湿法使用较普遍。但是由于高炉煤气灰尘特有的物理化学性质所致，存在着湿法管式电除尘器沉淀极管清灰难的问题，这是多年来困扰冶金系统湿法管式电除尘器正常生产的一大障碍。我厂有两座Ｄ１５２型管式电除尘器，于１９７８年投产至今，使高炉煤气的净化质量一直保持在５ｍｇ／ｍ～３以下。但是，由于设备运行时间较长，沉淀极管清灰问题又一直没有得到很好的解…     

声波清灰技术在高炉热风炉上的应用

为清除热风炉预热器内部积灰,采用声波清灰技术。声波清灰是指通过声波发生器,把高压气流调制成强声波,利用声场能量,清除和减缓换热器表面的积灰。通过调试测定,声压级选择150～160dB作为设定参数。该技术先进、性能可靠,使预热器内壁保持无灰尘堆积,达到空气与煤气的充分预热。     

利用高压净煤气给高炉炉顶加压的节能分析

原煤气加压机抽取１１０ｋＰａ低压煤气加压至２８０ｋＰａ，功耗大。为节约能源，对煤气加压机系统进行改造，改造后煤气加压机抽取２３０ｋＰａ的高压煤气，加压至２９０ｋＰａ，大大节约能源。     

锌焙烧余热锅炉蒸汽清灰技术探讨

简述锌焙烧余热锅炉积灰的形成与影响,积灰性质及清灰机理的分析,蒸汽清灰方案的制定及方案的实施与效果。     

声波清灰系统在电除尘器的应用及分析

分析了国内烧结、球团工艺电除尘器大多采用的顶部电磁振打和侧部摇臂锤振打两种机械振打方式的缺点。提出了采用声波清灰与机械振打相结合的方式以及单独使用声波清灰的方式,这两种方式具有提高除尘效率、降低烟粉尘排放浓度等优点,完全可以在电除尘器上推广应用。     

回转反吹清灰机构故障分析及对策

济钢机械设备制造厂5t电炉除尘器，由于设备本体变形、自身设计缺陷及过程累积误差等原因，造成回转臂经常折断、滤袋“硬壳化”、介质捕集率低等。采用极坐标位控清灰机构，通过PLC控翩技术控制喷嘴摆动和径向位移，实现喷嘴的反吹定位。达到调整清灰时间或风量。控制反吹顺序。适应工况变化，清除滤袋表面集灰目的。使用证明，极坐标清灰机构彻底消除了原有设备故障，烟尘捕集率提高到95％以上，年可节约费用达10万元。     

声波清灰系统在烧结机机头电除尘器中的应用

主要介绍了声波清灰的技术特点以及声波清灰技术在宣钢炼铁厂的应用效果.     

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。     

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)