蓄热炉HTAC技术应用与节能减排效果的分析研究

以目前国内高效节能的蓄热式加热炉为研究对象,开展了HTAC高温低氧燃烧技术在蓄热式加热炉上应用与效果分析。HTAC技术与空气高温预热的有效统一应用,可有效降低蓄热式加热炉烟气中NOx的排放浓度,同时缩短了烟气-燃烧过程中的换向时间,具有明显的燃料节能效果。HTAC技术的研究与应用,为蓄热式加热炉今后的节能减排发展提供了探索思路和有关途径。     

蓄热式加热炉的热工特点分析

简述蓄热式加热炉的工作原理、技术特性及节能效果,通过对蓄热式加热炉的热平衡测试结果的分析,指出蓄热式燃烧系统的热工特性。     

热轧3号加热炉燃烧技术的分析及运用策略

梅钢1422mm热轧3号加热炉,按照节能、环保和提高加热质量的要求,采用了蓄热式燃烧技术。通过投产近半年的生产实践,以及对蓄热加热炉的燃烧技术不断进行摸索和总结,对蓄热燃烧技术的负荷分配和控制策略有了较深的了解和认识,为蓄热式燃烧的技术进一步推广和使用,也为即将进行的1号加热炉改造提出了建议。     

热脏发生炉煤气在蓄热式加热炉上的应用

概要论述了蓄热式高温空气燃烧技术的特点及国内应用状况,介绍了蓄热式燃烧系统的结构与特点,重点阐述了采用热脏发生炉煤气加热炉的主要技术性能以及蓄热式加热炉供热分配、煤气系统、空气管路系统和排烟系统等设计特点。并且对蓄热式加热炉生产运行中出现的问题,解决措施及生产应用情况进行了分析。实践表明,采用热脏发生炉煤气开发研制的蓄热式加热炉具有高效、优质、节能和低污染等诸多优点,具有广阔的开发应用前景。     

台车加热炉的节能技术改造

介绍了中国首例燃焦炉煤气,空气单蓄热、全烟气利用,取消了炉体烟囱的燃烧系统近极限节能台车式加热炉改造后运行状况.比目前普遍采用的空气单蓄热、炉体带辅助烟道的加热炉节能15％以上,获得了比常规烧嘴配有换热器的加热炉节能40％以上的良好效果,将蓄热式燃烧技术提高到一个新水平.     

分侧分散换向蓄热式加热炉

介绍了分侧分散换向蓄热式燃烧技术在加热炉上的应用及其主要特点。加热炉的成功使用表明：分侧分散换向蓄热式加热炉更有利于节能和改善炉况。     

提升蓄热式加热炉能力的经验总结

节能减排是企业义不容辞的责任,回收烟气余热与采用高效燃烧及降低NOx排放量是工业炉研究运用的重点,蓄热式炉综合了以上优点脱颖而出。结合型钢厂多年使用蓄热式加热炉的经验,与同行们进行交流,进一步完善蓄热式炉的使用技术,提高蓄热式加热炉的加热能力,降低煤气消耗,促进蓄热式炉推广应用。     

轧钢加热炉节能优化设计

介绍了某厂加热炉设计的节能措施,采用蓄热式燃烧+常规燃烧的组合供热技术,利用空气预热器进行余热回收,同时在蓄热式燃烧自动控制、炉型结构、炉衬砌筑等方面进行节能设计,达产后进行的能耗和加热质量考核结果达到预期目标,钢坯加热均匀,氧化烧损少,证明了本加热炉所采用的节能技术是成功的。     

蓄热式加热炉热平衡计算及效率影响因素分析

以实际项目出发,介绍了蓄热式加热炉热平衡计算方法,并结合实例分析热量消耗对加热炉效率的影响,指出了提高加热炉节能的主要因素及方向。     

步进式加热炉节能技术的应用

通过在步进式加热炉中采用单蓄热式燃烧技术和新型燃烧装置,合理选用耐火材料和炉墙结构、炉压控制、变频调速、强制汽化冷却等多项节能减排技术,并通过合理计算与设备选型,实现了步进式加热炉节能效果显著的目标.     

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)     

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。     

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.