联合特钢公司230m~2烧结机机头电除尘器改造

为满足日益严格的环保要求,针对天钢联合特钢有限公司230 m2烧结机头电除尘器运行不稳定的问题,从电场、卸灰阀、阴阳极振打系统、阴阳极大小框架校正、阴阳极系统校正及漏风检查等方面对230 m2烧结机机头电除尘器进行改造。改造后电除尘器运行正常,能够满足国家排放标准。     

烧结机除尘系统的升级改造

为满国家2020年将要执行的超低排放标准要求,天津天钢联合特钢有限公司实施了烧结机机头、机尾电除尘系统提升改造工程。主要论述了原有六台电除尘器的存在问题、改造内容以及实施效果,改造后颗粒物排放浓度达到国家超低排放的要求。     

旋转喷雾干燥脱硫工艺在烧结机上的应用

328m2烧结机脱硫系统处理烟气量为198万m3/h,采用旋转喷雾干燥脱硫工艺进行全烟气脱硫。系统运行后SO2排放≤100mg/m3,脱硫效率≥90%,粉尘排放≤30mg/m3,完全满足国家环保要求。     

天钢烧结烟气脱硫除尘治理见成效

<正>近年来,天钢公司先后投巨资对三台烧结机实施烟气脱硫除尘改造,治理初见成效。其中,360 m2烧结机烟气脱硫除尘系统已运行一年多;265 m2烧结机烟气脱硫治理项目于2014年10月份投入使用。两套烧结烟气脱硫除尘设施均采用循环流化床脱硫工艺,投产至今始终保持稳定运行,脱硫效率在95%以上,烟气中排放的颗粒物在20 mg/Nm3以下;SO2排放稳定在100 mg/Nm3以下,排放指标均远好于国家排放标准。目前,180 m2烧结脱硫项目土建工程现已完     

含高浓度SO_2的烧结机烟气超低排放技术研究

对钢铁行业内含高浓度硫及氮氧化物的烧结机烟气超低排放的工艺技术选择进行了研究,寻求更佳的脱除粉尘颗粒物、高浓度SO2和不同浓度NOx的技术方法,使含高浓度SO2、NOx的烧结机烟气达到超低排放标准,减少污染物排放。     

180 m2烧结机超低排放改造减排效果分析

为满足国家及地方有关钢铁行业超低排放改造要求,舞钢公司于2019年对180 m2烧结机进行超低排放改造,项目内容包括对烧结机机头原有除尘、脱硫设施进行升级改造,并新增SCR脱硝系统,改造完成后污染物排放浓度及排放量得到显著降低,烧结机机头烟气中颗粒物、二氧化硫、氮氧化物排放浓度分别低于5 mg/m3、30 mg/m3、...     

烧结机机尾收尘系统的改造

分析了烧结机机尾收尘系统存在的问题 ,比较了拟采用的改造方案 ,改造后系统粉尘排放浓度和 6 0 m烟囱 SO2 浓度超标、烧结机尾部低空污染等问题得到有效解决     

烧结厂余热利用与主抽汽轮机驱动案例分析

以湘钢2×360 m2烧结余热发电、燕山钢三期烧结机主抽风机汽轮机拖动,以及江苏镔鑫特钢材料有限公司200 m2烧结机主抽风机采用汽轮机和电机联合驱动为案例,对烧结余热锅炉蒸汽的几种典型应用和烧结主抽风机使用汽轮机拖动的现状及其合理性进行了分析。     

烧结机尾电除尘改布袋除尘技术应用

根据国家新的排放标准要求,湘钢180 m2烧结机尾电除尘器改造成阻火器和布袋除尘器串联除尘工艺。实际运行表明,颗粒物排放浓度低于20 mg/m3。     

烧结机机尾收尘系统的改造

分析了烧结机机尾收尘系统存在的问题，比较了拟采用的改造方案，改造后系统粉尘排放浓度和60m烟囟SO2浓度超标，烧结机尾部低空污染等问题得到有效解决。     

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.     

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.     

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)