气力输灰系统进出料阀的改进与优化

以重庆发电厂气力输灰系统进出料阀的选型及改造过程为例,提出了对气力输灰系统进行改进和优化的思路,通过改造输灰系统中仓泵进出料阀门使系统可靠性得到提高,维护费用降低,值得其它电厂借鉴。     

锅炉气力输灰系统堵管原因及预防措施

以周口隆达发电公司浓相气力输灰系统为例，针对出现输灰系统的耗气量降低的问题提出了气力输灰系统的改进和优化方法，分析了在运行过程中发生堵管的原因并提出预防措施及处理方法；     

正压浓相气力输灰系统及应用分析

溪洛渡水电站黄桷堡拌和楼采用了正压浓相气力输灰系统,该系统自运行以来工作性能稳定、对环境污染小、满足了拌和楼生产的供灰要求.介绍了正压浓相气力输灰系统的构成及运行,并对其功能特点和应用情况作简要分析.气力输送技术以其输送量大、操作简便、在布置上不受地形影响、有利于环境保护等特点在粉粒输送领域得到广泛应用.     

气力输灰及粉煤灰综合利用方案探讨

研究了国内外电厂干式除灰技术和粉煤灰综合利用的现状,结合华电能源牡丹江第二发电厂的实际,对#7炉电除尘器气力输灰方案进行了探讨,对粉煤灰综合利用及经济效益进行了分析,指出了气力输灰系统应注意的一些问题。     

300MW机组输灰系统优化改造

分析了某电厂300MW机组投产以来输灰系统运行不正常、管道异常堵管的状况，根据出现的问题提出了针对性的改进措施，改造效果良好。     

干式除灰厂内气力集中系统通过部级技术评议

由浙江省电力修造厂承担的“七五”国家重大技术装备科技攻关项目——干式除灰厂内气力集中系统,于1991年3月8日在昆明电厂通过能源部科学技术司主持的专家会议评审。浙江省电力修造厂根据山东省石横电厂引进美国A—S—H公司的干式除灰技术,研制了负压气力输灰的成套专用设备,首次在昆明电厂进行工业性试验,现已经历了1380小时的     

电厂气力除灰系统及其设备的评述与选用

论述了几类有代表性的气力除灰系统及其优缺点，最后对气力除灰系统的发展真挚和选用２提出了一些看法。     

正压浓相输灰在大唐国际陡河发电厂的应用

大唐国际陡河发电厂#3,#4锅炉输灰系统在实际运行中出现了系统稳定性差、系统缺陷频发、电除尘器高料位、系统磨损严重、压缩空气裕量不足等问题。对出现的问题进行了分析,提出了解决办法。     

稀土耐磨钢输煤除灰管件与弯管

针对火电厂输煤输灰弯管磨损严重的状况,研制出稀土低合金耐磨钢管件与弯管,与20#钢对比了耐磨性,指出三个环节是保证该钢种铸件质量的关键。     

垃圾气力管道收送系统在工程中的应用简介

介绍了垃圾气力管道收送系统的基本定义、系统分类和系统组成,详细探讨了垃圾气力管道收送系统的设计要点和运行流程,并简要分析了国内外相关工程案例,为类似工程提供参考。     

Automated system for removal and pneumatic transport of fly ash from electric precipitator hoppers

A system for removal and pneumatic transport of fly ash is examined, in which air pulses act on batches (pistons) of ash formed in a duct. Studies are made of the effect of several physical parameters on the force required to displace a piston of ash and these serve as a basis for choosing a system for removal and pneumatic transport of ash simultaneously from several hoppers of an electric precipitator. This makes it possible to separate the ash particles according to size without introducing additional components. Formulas are given for calculating the structural and dynamic parameters of this system and measurements of indirect dynamic parameters are used to calculate the input-output characteristics of the system. In order to optimize the system, configurations for summing several ducts into a single transport duct for pneumatic ash transport are proposed. Some variants of dry ash utilization and the advantages of producing of size-separated particles are considered. __________ Translated from élektricheskie Stantsii, No. 2, pp. 26–30 (2008).     

System for the pulsed pneumatic transport of ash from ash-collector bins

Results of investigations of the dependence of the percentage of voids on the shear force of a layer of ash, on the basis of which the design principle of the subassembly for the feed of ash to a transport pipeline is developed, are examined for optimization of ash flows in a pulsed regime. The schematic of a system of pulsed pneumatic transport of ash from the bins of ash collectors, and results of measurements during experimental operation of the system, as well as relationships for the calculation of its dynamic parameters are presented. Conclusions concerning the high reliability of the removal and pneumatic transport of ash over a distance of more than 80 m with minimal air consumption are drawn on the basis of results of the experimental operation. __________ Translated from élektricheskie Stantsii, No. 6, June 2007, pp. 17–20.     

Automated System for Controlling the Operation of the Shaking Elements of Electrodes in Combination with Dry Removal of Ash from Electric Filter Hopper

An automated system for controlling the operation of shaking elements of electrodes (aeroridges) is suggested, which cleans the electrodes of the electric filter synchronously with the system of pneumatic removal of ash. Relationships for calculating the design parameters of the system depending on the modes of pneumatic transportation and dependences of the parameters of the fluidized layer of the removed ash on the structural variants of aeroridges are presented.     

一种新型的清淤输泥设备

提出一种新型的清淤输泥方法和设备，研制了能远距离输送高浓度、大粘度、低含水量的淤泥和软粘土的土方施工设备，包括进料口、推送器、表面膜发生器、脉冲切割器、定位系统、智能控制系统、输料管道、管道浮子等．该设备具有能耗省、工效高、效益好、结构简单、故障少、运行维护方便，定位准确性高、自动化程度高的特点，可适用于水利、环保、建筑工程中的淤泥和软粘土输送。     

多机系统水力振动与能量损失分析

针对多机系统的机组振动差异问题,采用RANS-LES数值计算方法,模拟一管双机组内部流场,利用监测点压力脉动信息分析过流部件的振动强度,计算能量损失与机组效率。结果表明,部分开度下,岔管的水流分配不平衡导致两机组流场存在差异,影响过流部件压力脉动与振动强度。数据对比发现2号机组尾水管涡带极不稳定,振动更强,导致能量损失更多,效率下降更严重。     

Experimental study on wave-current structure around a pneumatic breakwater

A model of a pneumatic breakwater comprised of perforated pipes placed on a wave flume bottom and connected to a piston-type air compressor is installed in a wave flume. Ascending air bubbles form an aerial barrier which dissipates wave energy and reduces the height of transmitted waves. The model is exposed to regular waves with fixed parameters, and its properties are modified by changing the amount of air supplied to the pipes. Particle Image Velocimetry and Acoustic Doppler Velocimetry methods are employed to measure a wave-current velocity field in the close vicinity of a submerged aerial barrier used as a breakwater. The measurements are supported by free-surface elevation registration in order to evaluate the effectiveness of the pneumatic breakwater in damping waves and to identify processes responsible for wave energy dissipation. Basing on the measurements, the performance of the pneumatic breakwater in different wave conditions is analysed. The results indicate that the dissipation of energy inside a region of a turbulent flow induced by ascending air bubbles may be considered the main mechanism of wave energy attenuation by pneumatic breakwaters.     

600MW亚临界机组除灰系统故障处理与优化

重点介绍了伊敏电厂二期2台600MW亚临界机组除灰渣系统的运行状况及其主要设备的多发故障及采取的处理措施。针对目前开展的节能减排工作,综合分析了内蒙古伊敏发电厂除灰渣系统试行的优化方案。以达到挖掘节能潜力、提高经济效益和机组安全运行之目地：     

固液两相流中水轮机基本方程式及相似准则

本文先建立了固液两相流中水轮机基本方程式,并对基本方程式进行了定性分析,得到液相和固相出口速度三角形的适当组合,可以获得既具有较高能量性能,又具有较好气蚀性能的水轮机转轮;按清水条件设计的转轮,在固液两相流中运行时,其能量性能和气蚀性能均不很理想。然后系统地建立了固液两相流中水轮机的相似准则,得到了单元工作量的表达形式。