唐家沱污水处理厂进水泵站的设计优化

通过对唐家沱污水处理厂进水泵站的进水前池流态及水泵吸水口的水力模型试验，阐述了不良进水流态引起的水力性能变异、降低泵站效率等危害，提出了改善进水泵站进水流态、提高泵站效率的有效措施。     

前池及进水池对泵站运行的影响和改进措施

前池及进水池是泵站最主要的进水过流部件,泵站来水通过前池及进水池的调节之后最终进入水泵,因此两池对入泵水流的调整直接影响到水泵的效率及整个泵站的运行效果。本文分析了不同形式的前池及进水池对池内水流流态的影响并提出了改进流态的措施,为泵站工程的进水设计提供参考。     

侧向进水前池的流态分析及其对水泵性能的影响

本文以某泵站模型试验为依据,对侧向进水前池进行了流态分析并提出了改善措施。对修改后的模型进行了试验。结果表明,修改后的池中流态明显改善,水泵机组效率显著提高,淹没深度有所降低。这些对提高水泵安装高程,减少工程投资,对泵站节能和经济运行都有重要意义。     

上海污水治理二期工程南线A^#泵站浑水模型试验

城市污水泵站普遍存在淤积问题，给泵站运行、管理带来不便。结合上海市合流污水治理二期工程南线Ａ＾＃泵站水力模型试验研究，通过浑水试验，对原设计前池、市位井淤积规律进行了分析，提出降低前池淤积的措施。     

压水板/导流墩组合导流装置的开发及其在SB泵站前池中的应用研究

上海市污水治理工程的基本形式是将城市各处的工业和生活污水汇聚至大型管道 ,由若干大型污水泵站驱使管道污水作长距离输运 ,经污水预处理厂预处理后从排放口排至长江口入海 ,其中大型污水泵站是污水治理工程的核心组成部分。上海系人口密集城市 ,土地资源十分宝贵 ,因而泵站的占地受到较大限制 ,致使泵站各部分比较拥挤 ,尤其是前池 ,往往池长较短且扩散角较大 ,极易造成前池流态不佳、各水泵配水不均、泵站能耗增加及沉砂情况严重等不良后果 ,这也是发展城市污水治理工程需要解决的带有普遍性的关键问题。因此 ,针对城市污水泵站前池在尺…     

西江引水工程泵站的设计

介绍了西江引水工程泵站级数、取水泵站及配水泵站的设计情况,对二级和三级泵站加压方案中管道运行压力、经济性及系统控制复杂性进行了分析。泵站级数采用二级,设置取水泵站和配水泵站。从取水头部、前池、水泵配置、水泵调速方案及进、出水管等几个方面介绍了取水泵站的设计要点。从配水泵站加压方式、调节池、水泵配置及进、出水管等几个方面介绍了配水泵站的设计要点。     

大流量高扬程雨水泵站设计

泵站作为雨水系统重要组成部分,水泵选型及泵站设计合理与否直接关系到该雨水系统的排水安全。结合具体工程实例,着重探讨了泵站规模确定及大流量高扬程雨水泵站主要设备水泵选型,并介绍了该泵站工艺流程、泵站各工艺构筑物设计功能及设计参数,通过实际运行反馈认为在泵站设计中水泵数量、水泵具体选型、前池及进水流道的设计等对泵站至关重要,直接影响到泵站能否正常、高效运行。泵站压力出水管选用新型管材PCCP,具有施工快捷,防腐性能好等特点,可为实际类似工程提供参考。     

侧向进水城市排水泵站配水池水力优化设计

针对侧向进水泵站前池中容易出现流态紊乱、各水泵机组来流不均的问题,利用计算流体力学(CFD)对设置配水池后的前池三维流场进行了数值模拟,研究了配水池的进口跌坎高度、底部结构形式和宽度对配水效果的影响,通过比较给出了优化设计参数.结果表明,配水池设计参数的优化可以显著提高其配水效果,为各水泵机组提供比较接近的来流条件,有助于提高泵站的整体运行性能.     

汕尾发电厂循环水泵房进水前池及流道优化设计研究

大容量电厂循环水泵房进水流道的水力性能设计对保证循环水泵的安全和高效运行至关重要。受地形条件的限制,汕尾发电厂循环水泵房进水前池设置在90°转弯的位置,经过物理模型试验,测验在不同的运行工况下从引水明渠至进水前池之间的水头损失,分析和研究自流式引水明渠与循环水泵房进水前池连接段及进水前池水流流态的均匀性和稳定性,提出改善进水前池及进水流道流态的优化设计方案。     

上海污水治理二期工程中线2号泵站前池浑水模型试验研究

本文结合上海污水治理二期工程中线２号泵站的浑水模型试验，对泵站前池泥砂淤积与冲淤情况进行了分析研究，针对原设计方案中的问题，对相应的改正措施进行了实验。     

某电厂泵房前池壅水高度模拟计算研究

针对某电厂循环水供水系统的特点,运用流体分析软件对系统事故停泵导致泵房前池壅水的水力过渡过程进行了计算机仿真。综合考察了系统内水锤力与瞬态水量对壅水过渡过程的影响,得出了不同工况相应的壅水高度值。从仿真结果看,综合考虑瞬态水量的影响后,最大壅水高度增加,且水位波动曲线更加复杂,应综合考虑合理给出保护高度。经计算机仿真计算得出的结论对提高电厂循环水系统的可靠性和运行稳定性具有重大的意义。     

大型潜水泵泵站侧向进水形式的技术分析

针对大型潜水泵泵站,比较前池正向进水与侧向进水形式的特点,分析侧向进水形式的配水流态,并提出整流措施。以上海虹口港、杨浦港地区旱流污水截流工程为实例,介绍采用侧向进水形式,并配以整流措施的工程方案,经实践证明,方案是合理的,可减小土建投资。     

竖直U形地埋管换热器传热特性实验研究

竖直U形地埋管换热器进水温度一定的条件下,进出水温差不仅反映地埋管换热器的换热能力,还影响着地源热泵的运行效率,引入地埋管换热器能效系数反映此影响特性。实验研究了地埋管换热器进水温度、流量、地埋管埋深对地埋管换热器传热特性的影响。提高地埋管换热器的进水温度、降低流量、增大地埋管埋深可以有效增大能效系数。受地质条件与经济性等制约．地埋管换热器进水温度、埋深不能无限制增大,流量不能无限制减小,应根据实际情况进行优化分析：     

带膨胀机CO2跨临界热泵系统运行特性

建立了带膨胀机CO2跨临界热泵系统的数学模型,将模拟计算结果与实验测量结果进行了比较,验证了模型的准确性。利用数学模型分析了冷却水进口温度和质量流量、冷冻水进口温度和质量流量对带膨胀机CO2跨临界热泵系统的制冷性能系数及最佳高压侧压力的影响。降低冷却水进口温度和提高其质量流量不仅有利于提高制冷性能系数,而且能降低最佳高压侧压力。提高冷冻水进口温度及质量流量有利于提高制冷性能系数,对最佳高压侧压力影响不大。     

黄河堤防工程吹填固堤新技术研究与应用

利用疏浚设备,远距离输砂是适合黄河进行机淤固堤的施工方法.为进一步提高设备的生产效率,对组合泥浆泵、排泥管道、退水设备等进行改进,研制了集浆增压罐、9PSJ泥浆泵、分岔式排泥管、自流式排水和浮动倒虹吸排水、多功能自动旋喷水枪等吹填施工设备.结合这些设备的构造和工作原理,在工程中应用,取得了一定的经济效益.     

Phthalates,nonylphenols and LAS in an alternately operated wastewater treatment plant--fate modelling based on measured concentrations in wastewater and sludge

The performance of an alternately operated activated sludge wastewater treatment plant (WWTP) has been investigated with respect to six phthalates, nonylphenol (NP) and nonylphenol diethoxylate (NPDE) and linear alkylbenzene sulphonates (LAS). Samples of raw sewage, primary and secondary sludge and treated water were collected during an 8-day period in May 1999 and analysed for dissolved and sorbed substances. To evaluate the system performance with respect to substance removal through biodegradation and sorption to sludge the measured data were applied in a model describing the different bioreactors as one single reactor, corresponding to the concepts of, e.g. SimpleTreat. The most abundant of the investigated phthalates was di-(2-ethylhexyl)-phthalate (DEHP) with a measured mean inlet flow of 240g/day. Two percent of this amount was found in the treated water, 70% was biodegraded and 28% was found in the sludge. For LAS the mean inlet flow was 20,300g/day, of which less than 1% was found in the treated water, 84% was biodegraded and 15% was found in the sludge. The mean inlet flow of NP and NPDE was 44 and 590g/day, of which 4% and 2% was found in the treated water, 80% was biodegraded for both substances, and 16% and 18% was found in the sludge, respectively. The WWTP removal of the investigated substances was thus high compared to other studies of conventional activated sludge WWTPs. The simple model set-up presents a strong tool for predicting substance removal and system sensitivity related to changes in the inlet conditions, such as concentrations and flow. Furthermore, it allows the inclusion of complex alternately operated WWTPs in risk assessment tools such as e.g. SimpleTreat.     

气浮工艺在水厂排泥水处理中的应用

针对气浮工艺在水厂排泥水处理应用中的实际问题,考察了投药量、进泥量、进泥浓度、进气量和药剂种类对气浮处理效果的影响。结果表明,投药量、进泥量和进泥浓度对气浮上清液浊度和出泥含固率均有影响;进气量对气浮影响效果较小;阴离子聚丙烯酰胺在处理效果上比阳离子聚丙烯酰胺稍差,但其在经济性和上清液回用方面要优于阳离子聚丙烯酰胺。     

地埋管地源热泵制热性能测试与分析

理论分析地埋管地源热泵相比空气源热泵的节能率。结合工程实例,对地埋管地源热泵地埋管换热器进出水温度、冷凝器进出水温度、热泵机组日能效比、供暖期能效比进行了实测计算。在测试期,地埋管换热器进出水温度、冷凝器进出水温度均在正常范围内波动。日能效比基本不随室外温度的变化而波动,说明热泵机组的制热性能比较稳定。供暖期能效比为3.05,说明该项目地源热泵的制热性能比较理想。     

Oily compounds removal in wastewater treatment system of pars oil refinery to improve its efficiency in a lab scale pilot

The aim of this research is inspecting the efficiency of physical-chemical and biological processes with the active sludge method in the wastewater of the Pars Oil Refinery Company. This research was done from 26th, January 2007 and continued up to 27th, May 2007. The main operation in Pars oil refinery is to produce lubricants. This research tries to examine and evaluate the performance of treatment system at the refinery to decrease microorganism in the industrial wastewater in a laboratory scale pilot. The pilot has two sections; physical-chemical section, including Dissolved Air Flotation system, and biological section, including active sludge reactor and clarifier. This investigation carried on a 10 liter Dissolved Air Flotation reactor and an active sludge reactor in a laboratory scale. The volume of the aerireactor (aeration reactor) was 10 liters, and the volume of the secondary sediment was 3.5 liters. The waste water of the refinery was used as inlet flow of the pilot and necessary sludge was obtained at first from the Shahrak Ekbatan waste water treatment system. After analyzing the test results, it was concluded that the average percentage of excluding oil, Chemical Oxygen Demand and Biological Oxygen Demand was 29.7, 49 and 27.8 respectively. This indicates the effective role of physical treatment in decreasing oily emulsion material that would result in decreasing organic density in untreated wastewater. In biological system, the efficiency of excluding Chemical Oxygen Demand and Biological Oxygen Demand is 73.4 and 84.7, respectively. This confirms high efficiency of this unit. The samples taken from entering (influent) and exiting (effluent) wastewater of both units were tested. Standard Methods were applied to determine the considered physical and chemical parameters.