共查询到19条相似文献,搜索用时 62 毫秒
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介绍烟气脱硫技术的典型工艺,即湿法石灰石-石膏烟气脱硫工艺和循环硫化床(干式)烟气脱硫技术。论述脱硫系统用泵和机械密封的特点。提出了烟气脱流系统用泵国产化对策。 相似文献
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燃煤电厂烟气脱硫技术研究进展 总被引:6,自引:0,他引:6
综述了近年来国内外几种主要的烟气脱硫技术,介绍了几种常用工艺的原理、技术特点,提出了发展烟气脱硫技术存在的关键问题及其研究方向。 相似文献
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烟气脱硫技术研究现状与进展 总被引:3,自引:0,他引:3
对国内外烟气脱硫技术应用现状、脱硫原理及其特点进行分析.针对当前烟气污染控制现状以及亟待解决的突出问题,提出烟气脱硫技术应用研究发展方向. 相似文献
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通过分析烟气脱硫系统工艺流程,根据系统的特点和控制要求,利用Profibus现场总线和工业以太网技术构建了上下两层网络架构体系,设计开发了一种基于PLC软冗余技术的烟气脱硫控制系统。为了取得良好脱硫效果,石灰石浆液pH值的调节过程采用串级加前馈的PID控制方式,有效解决了回路响应滞后、适应性差的问题。实践证明,该系统具有良好的稳定性和实用性,达到节能减排的效果。 相似文献
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电子束辐照烟气脱硫脱硝工业化实验装置的计算机测试系统 总被引:1,自引:0,他引:1
本文对电子束辐照脱硫脱硝工业化实验的装置和工艺流程进行简要的介绍,描述了计算机测试系统工艺参数的设计和系统功能设计. 相似文献
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通过对章村矿矸石热电厂多级高效喷雾烟气脱硫技术的分析,并与国内外主要脱硫技术进行比较,论证了该电厂针对锅炉实际情况采用三级塔的多级高效喷雾湿法烟气脱硫装置,效率可以达到99%,完全可以满足环保排放要求. 相似文献
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烟气脱硫是近几年发展起来的一种控制二氧化硫污染、防止酸雨危害的新型技术,利用烟气脱硫可以有效削减二氧化硫的排放量,控制大气二氧化硫污染,保护大气环境质量。目前炯气脱硫研究的热点是湿法、半干法和干法。 相似文献
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Nat Vorayos Nakorn Tippayawong Bancha Thanapiyawanit 《Journal of Mechanical Science and Technology》2008,22(5):973-980
Enhancement of thermal performance in an incinerator and flue gas treatment with a randomly packed bed of uniform spheres
was investigated in a custom-made experimental facility and reported in the present paper. Pressure drop, temperature evolution
and heat transfer characteristics were evaluated for a range of superficial velocities, Reynolds numbers and bed geometries.
Results revealed that increases in both superficial velocity and bed thickness caused a rise in pressure drop across the packed
bed in similar fashion to the Ergun equation but with different coefficients at low Reynolds number between 60–300. The two
constants were empirically determined to be 68.5 and 4.95. It was also found that the packed bed affects axial temperature
distribution from the incinerator chamber to stack. For the same heating rate, higher temperature was achieved in the chamber
with the packed bed, and peak temperature was reached at a rate of 7–10% faster than that without the packed bed during the
startup period.
The downstream side of the thicker bed appeared to have lower temperature than the thinner bed for the same axial position,
demonstrating less flue loss during the transient state. The incinerator chamber proved to have higher temperature rising
rate and reached higher maximum temperature with the presence of the packed bed. 相似文献
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针对当前湿法烟气脱硫系统经济效益和脱硫效率存在的问题,通过对湿法烟气脱硫系统前加装烟气余热回收装置,使脱硫系统设计方面得到了改造,并分析了造成脱硫效率降低的几个主要因素,并通过优化其运行方式,使得脱硫系统既满足高脱硫率。也使脱硫装置的经济效益得到了显著提高。从现在投运的电厂可知,该优化方法是可行的。 相似文献
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分析了湿法烟气脱硫工艺的特点及腐蚀机理,介绍了几种湿法烟气脱硫装置适用的阀门特点及其所适用的工况,阐述了湿法烟气脱硫工艺选择阀门应考虑的问题及阀门材料的选择。 相似文献
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随着行业竞争的加剧和不断升级的环境保护压力,各生产企业更加追求生产设备的可靠性和稳定性,尤其是那些控制关键性生产工序的设备,往往需要采用冗余配置。PLC的集散控制系统(DCS)是目前最为先进的过程冗余控制系统。该文重点介绍了以2个ControlLogix处理器为基础,利用现代网络技术、图形显示技术和冗余技术,实现对分散控制设备进行调节、监视和管理的DCS系统在烟气脱硫生产方面的系统解决方案。 相似文献
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过幼南 《工业仪表与自动化装置》2003,(6):60-62
介绍烟气排污计量仪的设计方法。设计的特点是把计量仪作为数据采集器和记录器,而用PC机管理数据。用户利用IC卡定期从仪器中取出数据,再将数据转送到PC机中,由PC机进行数据处理、打印、存档、制定报表、绘制曲线。实现了烟气排污的数字化管理。 相似文献
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简要概述了PI实时数据库系统的设计原理和分布式结构,并介绍了PI实时系统在中电国华北京热电分公司的脱硫DCS中的应用。指出了工程实施中存在的问题并提出了解决方法。该PI实时系统的成功实施,实现了对脱硫设备的实时监控和公司的数据资源共享,为实现企业生产的信息化奠定了坚实的基础。 相似文献
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In gravimetric measurements of dust emissions from industrial technological plants, the required mean gas velocity in a conduit is often determined by Pitot traverse method. It is commonly seen as a method giving good approximate values of mean gas velocity, although the actual rate of this approximation is not considered in the analysis of measurement results. It was seen that there was a need to establish what magnitude of error might occur in practice due to the small number of measurement points and typical non-uniformity of the gas velocity profiles in conduits of rectangular cross-section. The calculations were based on the concept of treating a measurement plane as one consisting of a set of elementary planes. The elementary gas velocity profiles in these elementary planes were simulated, the mean velocity for these profiles were calculated based on point velocity values, and the measurement uncertainty of this mean velocity determined. This uncertainty results in the uncertainty of the mean velocity across the entire measurement plane. It appears that, depending on the number of measurement points and gas velocity profile non-uniformity, the value is not small and is of the order of several percent, and hence needs to be taken into account in the budget of the combined uncertainty of mean velocity, which in turn contributes to the uncertainty of gas volumetric flow rate and dust pollutant mass flow rate. 相似文献