烧结机机尾烟气余热发电的探究与应用

邯钢新区回收了2×360m2烧结机机尾余热烟气,共配置2套余热锅炉,产生中压蒸汽并入原30 MW烧结余热发电中压蒸汽母管,以实现能源循环利用,提高现有烧结余热发电机组的利用效率,提高企业经济效益。     

提高烧结余热回收的生产实践

针对烧结低温废气余热回收效率低,以及烧结余热回收设备能力未完全释放的问题,唐钢对烧结机机尾废气温度控制系统和环冷机烟气循环系统进行了优化。结果表明,在实施精细管理的基础上,通过应用BRP控制模型、投入环冷与烧结机联调控制等系列措施,解决了上述问题,并实现了吨矿余热回收发电量增加13%的目标。     

安钢提高烧结余热利用的生产实践

对安钢烧结余热利用的生产实践进行了总结,介绍了安钢两套烧结机余热发电机组的建设、运行情况,并对机组发电情况进行了比对,分析了烧结机机尾余热锅炉和液密封环冷机对发电效果的影响,指出了当前安钢烧结余热利用生产暴露出的问题和存在的不足,并提出了解决办法和改进措施。     

烧结机烟道废气余热回收利用

本项目为烧结机余热回收利用二期工程,是回收利用2×360m2烧结机机尾烟道余热,新设置2套余热锅炉,产生蒸汽分别并入一期烧结环冷机余热发电站。烧结余热锅炉系统除盐水、工业水由现有外网供给,机尾余热锅炉采用DCS集中控制系统,考虑设现场电气室,发电主厂房集中控制。大大减少了热源排放,经济效益和环保效益显著。     

烧结机余热发电DCS监控系统配置及功能

烧结机炉料经烧结后在冷却过程中产生大量的高温烟气,通过烧结余热发电可以提高生产工艺流程的合理性,减少烟气热、尘排放,减轻对大气环境的影响,增加电力生产,提高能源综合利用率,符合国家建立节能型社会、促进循环经济发展的总方针。本文针对带冷式烧结机的系统特点,依据具体工程实践,详细介绍了烧结余热发电DCS监控系统的配置及功能,从DCS监控系统组成、DCS软硬件配置以及系统主要功能等几方面介绍了烧结余热发电的热工监控系统设计特点,并通过对工程运行结果的分析指出该系统的特点,为烧结余热发电DCS监控系统的设计和应用提供了实用的工程实践经验。     

焦化厂焦炉烟气余热回收技术及应用

焦化厂焦炉烟气蕴含着巨大的能量,某钢铁厂以热管技术为依托,充分回收焦炉烟气余热,利用余热产生低压饱和蒸汽,应用于干熄焦余热发电系统中除氧水加热、烧结机机尾除尘系统伴热、竖炉脱硫系统加热等。     

济钢工业余热资源的回收及利用

针对钢铁工业能源现状及余热资源分布情况,结合实际详细阐述了济钢近10多年的节能改造进程,并深入分析研究了高炉顶压发电、干熄焦发电、燃气-蒸汽联合发电、烧结机带冷余热回收和高温烟气余热回收利用等节能技术的工艺原理。     

烧结机尾烟气与冷却废气余热联合回收发电技术的开发与应用

分析了烧结工序中可回收利用的余热资源及其特性,在此基础上提出了烧结机尾烟气与冷却废气余热联合回收发电技术,并分析和研究了其技术优势和瓶颈,提出了烧结余热发电系统设计的一些建议。     

济钢烧结余热发电生产现状

介绍了济钢320m2烧结机余热发电的基本情况和生产现状。通过稳定烧结过程、合理地控制烧结BRP、加强对设备的巡检力度和工序间的联系、强化台车密封处理等措施,解决了蒸汽参数不稳定、烧结机短时间停机、烟气回收系统漏风等问题,济钢320烧结余热发电系统年节能量为2.27万t标煤。     

安钢烧结余热回收发电技术应用及潜力

烧结生产过程中会产生大量余热,通过烧结环冷废气和烧结机尾部烟气余热回收发电技术,利用安钢内部余热进行回收发电,使烧结生产有效地降低了能耗和生产成本,产生了经济利益和社会效益,同时减少了高温废气的排放,保护了环境.指出烧结余热回收发电技术具有广阔的应用前景,值得推广应用.     

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.