低品位氧化锌烟气脱硫结垢试验研究

采用低品位氧化锌灰作为脱硫剂吸收模拟烟气中SO2。考察脱硫循环浆液的pH和氧化铅含量、矿浆浓度、不同吸收反应器对脱硫效果的影响,同时观察脱硫系统结垢情况。结果表明,在进口SO2浓度为3 000mg/m3、pH 6、矿浆浓度15%、浆液中氧化铅含量5%、液气比L/G=3L/m3、烟气量12m3/h、脱硫吸收反应器采用空塔喷淋的条件下,脱硫效率能够达到90%以上,且运行过程中不会出现结垢现象。     

活性焦尾气脱硫系统的改进

贵溪冶炼厂硫酸车间活性焦尾气脱硫装置是工厂于2010年引进的重要环保设备[1].该装置采用成熟的活性焦干法脱硫新工艺,设计烟气处理量180,000Nm3/h,处理前SO2浓度1500mg/Nm3,脱硫效率≥80％.运转正常后,将会每年为工厂减少2000余吨的硫排放量,同时多生产出3000余吨的硫酸.但自投入运行以来,就一直存在系统故障率高,脱硫效率达不到设计要求等问题.     

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。     

焦化废水逆向喷淋进行烧结烟气脱硫试验研究

 建立逆向气液喷淋反应塔,利用焦化废水进行烧结烟气脱硫试验研究。研究烧结烟气SO2浓度、焦化废水pH值、温度等因素对脱硫效率的影响。当烧结烟气中SO2浓度为4000 mg/m3,温度控制在2 ℃,焦化废水pH值为9.0时,尾气中的SO2浓度降到118 mg/m3,脱硫效率达到97%。烧结烟气中SO2初始浓度增加可加快脱硫速率,增加脱硫量。升高焦化废水pH值、降低温度,有利于提高脱硫效率。     

莱钢4~#烧结机烟气脱硫中粉尘的影响与对策

针对烧结粉尘对莱钢4#265m2烧结机烟气脱硫的影响,采用烟气前期预处理,中间加强胺液净化等措施,实现了脱硫效率95%以上,SO2排放浓度低于100mg/m3,确保烧结烟气中SO2达标排放。     

烧结烟气脱硫技术的研究

为进行烧结烟气的脱硫处理,建立了密相干塔烟气脱硫新技术的试验装置,并进行了脱硫试验研究.该系统在Ca/S(摩尔比)为1.2、加水量为3%、循环灰浓度为400 g/m3的条件下,连续稳定运行,系统出口SO2浓度在80～120 mg/m3之间,脱硫效率达95%以上.     

通钢4号烧结机烟气脱硫的设计与应用实践

介绍旋转喷雾半干法烧结烟气脱硫原理及工艺流程。该技术在通钢应用投产后,实现了与烧结机生产100%的同步作业率,外排SO2浓度≤100mg/m3,脱硫效率≥90%,烧结矿脱硫成本约5.52元。     

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     

旋转喷雾干燥烟气脱硫技术在烧结机上的应用

鞍钢西区两台328㎡烧结机，系统处理烟气量为1980000m3/h，采用旋转喷雾干燥烟气脱硫工艺进行全烟气脱硫。脱硫系统主体设备包括：脱硫塔、浆液系统、布袋除尘器、增压风机、给排水泵、高低压配电柜、自动控制系统等。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。     

有机胺吸附解吸工艺在烧结烟气脱硫中的应用

莱钢4#265m2烧结机烧结烟气脱硫系统采用有机胺吸附解吸工艺,系统由烟气净化及SO2吸收、吸附液再生、胺吸附液过滤净化等工序组成,通过从环冷机引出废热,经再沸器后排放,解决了烟气温度低且波动大的问题;增加除氯站,除去吸收剂中富集的氯离子;采用自清洗空气过滤器等保证产品酸的品质。改进后系统运行稳定,烟气入口SO2含量<1300mg/m3,出口SO2含量<100mg/m3,脱硫率>92%。     

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。     

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。     

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.     

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.     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.