18m~2烧结机尾电除尘器扩容改造之初见

我厂烧结机已由18m2扩大为20m2，原配机尾21．6m2电除尘器的废气处理能力偏小。建议将电除尘器的电场加高（即加高阴极线和阳极线的尺寸），以增加电场过滤面积，扩大电场容积，提高废气处理能力。     

烧结整粒电除尘系统优化

通过技术改造系统优化,提高了65 m2电除尘器及90 m2电除尘器的运行效率,使得在除尘管道工艺分布上更为科学,风量合理分配,除尘能力与生产工艺相匹配。将岗位粉尘浓度降低到国家标准规定的接触极限以内。     

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。     

烧结机机头电除尘灰斗积灰治理

针对石钢280 m2烧结机投产初期,机头250 m2电除尘器经常积灰顶电场,造成电场短路、除尘器不能正常运行的问题,通过对电除尘器输灰刮板机传动、灰斗阻流板、仓壁电振、料位计的改进,彻底解决了灰斗积灰的问题。     

烧结机尾除尘改造

莱钢1#105m2烧结机通过增加1级121m2电除尘器,设计选用滤料和袋笼,改善供气系统,控制除尘清灰,改造集气罩、除尘管道等措施,将机尾电除尘器改造为电袋复合除尘器。改造后,实现了粉尘达标排放,粉尘排放浓度30mg/m3以下,布袋的完好率保持在99%以上,年节约运行费用47.5万元。     

优化转炉煤气回收的研究与实践

通过对电除尘器、煤气加压机进行升级改造和提高操作水平使煤气含尘量由50mg/m3降低到5mg/m3,回收CO煤气含量由50％提高到62％,煤气回收量由65m3/t提高到89m3/t,既减少了环境环境污染,又取得了显著的经济效益.     

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。     

攀钢钒360m~2烧结机机头电除尘器灰斗结块的治理

针对攀钢钒有限责任公司360m2烧结机机头330m2卧式三电场电除尘器灰斗结块现象的原因,进行分析整理,并提出了有针对性的治理措施。     

石灰石-石膏法烧结烟气脱硫技术

莱钢2×105㎡烧结机采用石灰石-石膏法烟气脱硫技术。介绍了脱硫装置的工艺原理、工艺流程、设计参数及现场布置情况,通过防管道磨损、消除除雾器堵塞、脱硫废水的综合利用、脱硫副产物无害化处理及提高电除尘器除尘效率等措施对系统进行了优化。该技术操作方便、易于检修,与烧结机同步运行率达到96％以上,烟气出口SO2浓度≤200mg／m3,粉尘浓度≤50mg／m3。     

高频电源在烧结电除尘器上的应用

烧结生产过程中,产生的主要污染物是粉尘,烧结粉尘治理以电除尘器为主要净化设备。电除尘器的排放浓度很难达到25～50mg／m2。本文论述了高频电源的原理、技术以及在钢铁行业降低排放的实际应用。     

论从实践理解世界的物质性和自然世界的先在性

马克思主义唯物论是一种物本主义形态的唯物论,还是一种超越物本主义形态、从实践理解世界的本质相关问题的实践的唯物主义的唯物论?这是一个我们必须搞清楚的有关马克思主义唯物论的本质规定性和精神实质的重大问题.在考察物本主义的唯物论及其思维方式的局限性的基础上,揭示了马克思主义唯物论是现代的、实践的唯物主义,并重点研讨了马克思主义唯物论关于从实践理解世界的物质性和自然世界的先在性的原理,以期为马克思主义唯物论进一步阐明人类世界的实践性原理奠定基础.     

Effect of cyproheptadine on the ultrastructure of the neurons of the arcuate nucleus in the hypothalamus of the rat

The data are presented on changes in the rat arcuate nuclear neuron ultrastructure after using cyproheptadine (peritol, Egyt Pharmaceutical Works, Hungary) in a water suspension at a dose of 20 mg/kg once daily during 7 successive days and twice a day within 10 days. It was shown that cyproheptadine decreases the functional activity of the arcuate nuclear neurons, depending on the total amount of the drug used. Cyproheptadine-induced inhibition of the forming neurohormone release from neurons is likely to be one of the mechanisms of its therapeutic effect in Itsenko-Cushing's disease.     

Characteristics of the sympathetic innervation of the nictitating membrane and of the vasculature of the nose and tongue of the cat

Vasomotor responses from the nasal mucosa and tongue, and contractions of the nictitating membrane, were recorded on stimulation of the cervical sympathetic or internal carotid nerves. Preganglionic sympathetic nerve fibres which elicited a membrane response possessed a lower threshold than those which evoked nasal vasoconstriction, while the latter displayed a lower threshold than fibres which evoked tongue vasoconstriction. The sympathetic vasodilator fibres to the tongue whose activity was revealed after alpha-receptor blockade, had a similar threshold to the vasoconstrictor fibres. Membrane contraction, nasal vasoconstriction and occasionally tongue vasoconstriction could be evoked by stimulating the internal carotid nerve. The postganglionic fibres innervating the nasal mucosa had a similar threshold to those of the nictitating membrane, which may indicate that there are small myelinated fibres innervating the mucosa. The preganglionic compound nerve action potential had four major components, S1-S4. S1, S2 and usually S3 fibres were associated with membrane contraction; S2, S3 and sometimes S1 fibres were associated with nasal vasoconstriction; and S3, usually S2 and occasionally S1 fibres were associated with vasoconstriction in the tongue. It is concluded that each of these three groups of nerve fibres, but not S4 fibres, may include fibres associated functionally with the three effectors. There was a considerable difference between the relative amplitude of the responses of the three effectors elicited by stimulation of the cervical sympathetic nerve at frequencies between 0.2 and 2 Hz. Vasoconstrictor responses were relatively larger than membrane contractions suggesting differences in the mechanisms of neurotransmission at the neuroeffector junctions.