基于“富氧底吹干法收砷”提升布袋除尘器运行效果的研究与应用

有色冶炼企业中大量使用布袋除尘器，其常见的清灰方式为脉冲喷吹清灰。脉冲喷吹清灰系统的运行效果，对布袋除尘器运行阻力、滤袋使用寿命等关键指标有着重要影响，根据某有色冶炼企业四台不同使用工况的布袋除尘器运行实际情况，与运行过程中做出的各项调整措施及改造后的运行情况进行分析，对有色冶炼企业布袋除尘器喷吹系统的运行方式、喷吹气源的选择等问题进行总结，提升了布袋除尘器运行的效果。     

高炉煤气干式除尘滤袋破损分析与改进

针对高炉煤气干式除尘实际运行过程中滤袋频繁破损问题,对除尘滤袋破损原因进行分析,并提出解决问题的改进措施,有效降底了除尘滤袋运行破损率,延长了除尘滤袋运行周期,取得了良好效果。     

转炉环集除尘器稳定运行控制与优化

铜转炉工况复杂,难以满足布袋除尘器使用条件,铜行业中少有使用布袋除尘器,本文根据转炉烟气收尘系统的工作原理,针对系统运行效果欠佳的原因,通过对转炉除尘器滤袋堵塞现象的成因分析,并采取有效措施,以满足操作可控,实施优化改进,系统运行效率明显提高,实现布袋收尘器滤袋在线更换,烟尘、重金属等有害物质的排放均优于国家标准限值,金属回收率同步提高,滤袋使用寿命延长,环境得到改善,创造了良好的社会及经济效益。     

汉钢2×240m~2烧结机除尘系统改造

针对汉钢烧结№.1、№.2机尾袋式除尘系统及成品筛分袋式除尘系统除尘效果差、滤袋寿命短等问题,在实地考察和分析的基础上,提出了三个除尘系统仅有一台除尘器扩容改造,其余两台除尘器和全部风机、电机完全利旧的改造方案。通过采用先进的烟气预处理、管网设计、阻力平衡等技术,最终实现了改造目标,为今后同类系统改造提供了借鉴。     

高炉干法除尘滤袋失效原因及防范措施

防止干法除尘滤袋失效,提高使用寿命,对于保障高炉稳定运行,降低生产成本,减少废弃滤袋填埋量具有重要意义。分析了滤袋失效的主要原因,从设备设计、制造、安装及操作维护方面讨论了防范滤袋破损、避免板结的措施。     

柳钢2号高炉干法除尘系统降低煤气含尘量实践

对柳钢2号高炉煤气干法除尘系统降低煤气含尘量的实践进行了总结。通过采取设计合适的滤袋材质和过滤速度、采用新型净煤气反吹清灰工艺、实现除尘滤袋快速检漏和稳定相关生产运行参数等措施,2号高炉煤气含尘量长期稳定在0.5mg/m~3较低的水平.     

布袋除尘在300m^3高炉上的应用

本文叙述了布袋除尘器在涟钢300m~3级高炉上的应用。应用中对输灰、清灰反吹、滤袋寿命、温度控制等问题均作了有效解决,使整个系统工艺先进、设备运行可靠,净煤气含尘量已达到10mg/m~3以下。     

焙烧多功能机组除尘系统滤袋的选择

滤袋是焙烧多功能机组除尘系统的主要部件。本文通过膨体微孔薄膜复合滤袋与普通滤袋的对比,说明了选择膨体微孔薄膜复合滤袋的正确性。     

南(昌)钢高炉煤气干法除尘滤袋长寿技术的应用

介绍了南钢3号高炉干法布袋除尘基本情况及特点,阐述了该套系统在运行中遇到的反吹阀堵塞、防爆铝板寿命低、进气方式、反吹方式的选择等问题及处理.总结了提高滤袋寿命的途径和技术措施.该系统实现了自投产至今5年零2个月未发生过布袋破损的长寿纪录.     

焦炭转运扬尘治理实践

鞍钢股份有限公司炼铁总厂针对焦炭转运过程中扬尘外溢、滤袋频繁破损的问题,优化了除尘系统风量,更换了皮带机密封挡帘,优化了除尘器参数、除尘器中箱体箱板及喷吹装置.优化后粉尘及噪声分别达到0.3～1.5 mg/m3和65.9～75.7 dB,远低于行业标准,且除尘系统运行稳定.     

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.