关于烧结烟气联合脱硫脱硝技术路线的探讨

文章介绍了目前主流烧结烟气脱硫和脱硝工艺特点,对国内运行的成熟的烧结烟气联合脱硫脱硝工艺进行了对比和分析,提出烧结烟气联合脱硫脱硝技术路线是发展的方向。     

活性焦(炭)干法烧结烟气净化技术在钢铁行业的应用与分析——Ⅱ:工程应用

为减排烧结烟气污染物,活性焦(炭)干法烧结烟气净化技术在钢铁行业的应用得到了关注.本文介绍了活性焦(炭)干法烟气净化技术的工程装备、在国内外烧结脱硫脱硝脱二噁英项目中的应用,并给出了建议.应用和分析表明,活性焦(炭)脱硫技术需进行成本降低和技术完善,值得在我国钢铁行业烧结烟气脱硫脱硝脱二噁英(PCDD/F)领域逐步推广.     

Howden VN~?固定密封回转式烟气换热器在烧结烟气脱硫和SCR脱硝工艺中的应用技术交流推介会召开

正目前,我国钢厂烧结烟气脱硫脱硝技术处于多样化发展阶段,认真分析不同的烟气脱硫脱硝工艺的适用性、先进性和经济性,总结近年来我国钢铁企业烧结烟气脱硫脱硝技术发展的经验与教训,对探讨烧结烟气脱硫脱硝技术发展方向,促进钢铁企业脱硫脱硝工作科学发展具有重要意义。为推动我国钢铁冶金工业脱硫脱硝环保工程的发展进程,山东金属学会联合河北、上海、河南、北京、天     

烧结烟气脱硫脱硝工艺的比较

烧结机头是钢铁行业SO_2和NO_x主要排放源。随着环境保护的压力不断加大,烧结烟气的脱硫脱硝工艺的选择就显得尤为重要。本文主要介绍了目前国内外主流的烧结烟气脱硫脱硝工艺,并对各种工艺的优缺点进行比较分析。     

钢铁企业烧结烟气超低排放改造技术浅析

为实现超低排放要求,在研究钢铁企业烧结烟气特性的基础上,对国内现有烧结烟气处理技术手段进行了总结,包括同时脱硫脱硝技术、SCR联合脱硫脱硝技术等,对实现烧结烟气超低排放改造的技术手段进行了分析与探讨,提出了超低排放改造技术发展的方向。     

烧结烟气脱硫脱硝一体化技术研究及应用

烧结烟气脱硫脱硝一体化方法解决了脱硫脱硝一体化烟气处理、脱硫脱硝组合剂以及脱硫脱硝产物综合利用的技术问题,该处理方法实现了一塔脱除烧结烟气中的多种污染物,可以达到超低排放目标且无废水产生,可以实现脱硫脱硝产物综合利用、零固废排放。     

某钢铁厂烧结烟气氨法脱硫工艺脱硝效果的评估

为评估某钢铁厂烧结烟气氨法脱硫工艺的脱硝效果,对烧结烟气进行现场人工检测和在线监测,同时对氨法脱硫工艺的脱硝效果进行验证实验。研究结果表明:该钢铁厂烧结烟气中氮氧化物以NO的形式存在,采用氨法脱硫工艺对烟气进行净化处理后,得到的脱硫率为97%左右,脱硝率为18%~20%;当模拟烧结烟气和吸收液的性质接近现场脱硫的实际情况时,得到的脱硫率为99.40%,脱硝率为22.48%,由此在一定程度上佐证了通过烟气现场人工检测和在线监测所得的该钢铁厂烧结烟气氨法脱硫工艺脱硝率的准确性。通过该研究,为烧结烟气氨法脱硫工艺脱硝效果的评估和氨法同时脱硫脱硝研究提供科学依据。     

烟气循环对烧结机脱硫脱硝的影响

介绍了烧结烟气循环意义,确定了烧结烟气循环的原则,通过分析国内学者和钢铁厂实践应用,总结了烧结烟气循环对烧结工艺的影响,并得出最佳循环烟气工况;同时分析了烟气循环对脱硫脱硝的影响,并对各种脱硫脱硝工艺和烟气循环结合进行了综合分析,结果表明半干法脱硫+SCR脱硫脱硝工艺是配合烟气循环的最佳工艺之一。     

臭氧氧化脱硝技术在烧结烟气中的应用

钢铁行业启动超低排放,烧结烟气的氮氧化物排放控制迫在眉睫,然而烧结烟气成分复杂、温度较低,应用常规的选择性催化还原脱硝技术存在局限性,需要开发科学、高效的脱硝技术。主要介绍了适合烧结烟气的臭氧氧化脱硝技术的原理,以及该方法目前在其他行业烟气脱硝中的应用现状,并且对臭氧结合钙法脱硫副产物的资源化利用提出了可行的办法。     

烧结烟气脱硫脱硝技术的发展与应用前景

简要介绍了国外烧结烟气脱硫脱硝的成熟技术及最新的进展,对主要脱硫技术进行了综合比较,分析了国内烧结烟气脱硫的现状及市场容量并对脱硫工艺的选择提出了建议.     

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。     

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)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

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.     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.