电厂除灰用耙式浓缩机的选型计算

分析了浓缩池中灰浆的沉降过程和浓度、流量等对浓缩机出力的影响，并对浓缩机进行了出力计算，最后提出了浓缩机的选型依据。     

引冲式自溃坝冲刷模拟计算

综合实例自渍坝冲刷模拟采用散体元理论对渍坝过程进行模拟计算,描述渍坝过程并绘出渍坝曲线．对自渍坝稳定分析先进行渗流分析,然后进行边坡稳定计算．     

宁夏扶贫扬黄灌溉八泵站压力管路的安全防护研究

水力过渡过程的分析、计算，已经成为压力管路设计、安全运行的重要课题。该项研究提出的大、小泵并联的数值计算方法和计算结果，利用二阶段缓闭蝶阀作为压力管路的主要安全防护手段，已经成功应用于该输水工程，经过实践检验证明：该模拟计算方法是符合工程实际需要的、是可行的。     

定期冲洗式沉沙池三阶段冲洗计算

依据定期冲洗式沉沙池水力冲洗的原型观测和模型试验,根据水沙运动特征,提出定期冲洗式沉沙池水力冲洗三阶段冲洗过程及划分,分别给出泄空冲洗、溯源冲洗和沿程冲洗各阶段的计算式和有关参数。     

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).     

Formation of mineral deposits in hydraulic ash removal systems

Selection of design schemes for the water supply (straight through, or circulating) of hydraulic ash-removal (HAR) systems for thermal electric power plants (TPP) is examined as a function of the character of mineralization of the water in a specific system. Causes are outlined for the formation of mineral deposits on equipment of the HAR system, which transports ash slurries of different types of solid fuels. The cause of the high rate of seasonal growth formation in the circulating HAR systems of TPP burning fuel with highly alkaline ash slurries is established experimentally in an example of a shale electric power plant. Measures are developed for rapid slow-down of the rate of growth formation in these systems. Measures are proposed for prevention of growth formation for other types of ash slurries. __________ Translated from élektricheskie Stantsii, No. 5, pp. 41–47, May, 2006.     

泵系统不同出流方式下的 水锤计算分析

泵系统自由出流时,在水力过渡过程中出口断面测压管水位与淹没出流时出口断面测压管水位基本不变的情形有所不同。将泵系统出口段作为一种特殊水力元件,应用特征线法计算泵系统自由出流下的水力过渡过程。对同一泵系统,通过事故停泵工况水锤计算可知,与淹没出流相比,自由出流方式可以增大管段水流压强,对水锤防护有利。泵系统自由出流下不需安装拍门或真空破坏阀断流设施,而自由出流比淹没出流多浪费一部分能量。当泵站出水池水位变幅较小、年运行时间较短时,从水锤防护和泵站维护方面看来,自由出流方式则是一种较优的运行方案。     

管网叠压(无负压)供水系统水泵能耗对比研究

分析了管网叠压(无负压)供水系统中水泵运行工况点的变化,并根据水泵的数学模型,推导了水泵的单位能耗与效率计算公式。在此基础上,采用数值算法对恒压供水和变压供水两种方式下水泵的能耗进行分析对比,研究了市政管网压力、用户流量对单台水泵、并联水泵运行的影响。研究结果表明变压供水相对恒压供水水泵的单位能耗有明显降低,降低程度受到管网末端水压的影响。     

自动喷水灭火系统气压供水设备容积计算分析

对于自动喷水灭火系统气压供水设备容积的计算,最不利点处喷头工作压力的选择将直接影响气压水罐容积的大小。通过水力计算分析,建议最不利点喷头工作压力取0.05 MPa,这样气压水罐的容积相比最不利点喷头工作压力取0.1 MPa时减小约40%,降低了造价,又可减小设备占用建筑的面积。     

离心泵蜗壳内压力脉动特性数值分析

为揭示离心泵蜗壳流道内的压力脉动变化规律,采用雷诺时均方法(RANS),对3种工况下的离心泵内部三维非定常湍流流场进行数值计算,分析同一蜗壳断面不同位置以及沿蜗壳周向不同点的压力脉动特性。结果表明:蜗壳流道内具有非常明显的压力脉动,在各种工况下压力脉动的主频均是叶片通过频率;同一蜗壳断面上的压力脉动从蜗壳底部到蜗壳背面先减小后增大,蜗壳底部监测点的高频脉动成分较多;沿蜗壳周向,随着圆周角的增大,压力脉动减弱,隔舌附近压力脉动幅度最大,且高频脉动成分明显增加。     

螺旋和刮板捞渣机除渣系统的性能比较

介绍了螺旋捞渣机和刮板捞渣机两种机械式除渣系统的工作原理，从不同角度对两种除渣系统的技术性能进行了分析对比，提出了一般的选型原则。