浅谈轻型(真空)井点降水在玻璃厂基础施工中的应用

在玻璃厂建设方案中,通常原料车间、熔化车间基础埋深较深,当工程所在地地下水位较高时,不可避免地会碰到基坑降水的问题。为了减少基坑降水对周边环境的影响,给基础结构施工提供一个干燥的作业环境,有必要对基坑降水进一步研究,使常见的基坑降水问题系统化、理论化。     

关于分馏塔设计的探讨

本文从设计角度出发,对分馏塔在设计中应如何确定设计参数、如何选择材料,及结构设计应考虑的问题等,进行详实的探讨。     

水泥矿山破碎站基坑爆破施工

在建破碎站基坑爆破施工方案安全控制的目标主要是确保基坑后面的永久边坡不受损伤以及相邻环境的安全。设计主要针对在重点保护对象下进行的基坑爆破开挖,通过爆破方案的选定和孔网参数的优化,确保基坑爆破时边坡的稳定及相邻环境的安全。     

关于丙烯腈反应釜设计的探讨

本文从设计角度出发,对高度危害介质的反应容器在设计中应如何确定设计参数、如何选择材料,及结构设计应考虑的问题,进行详实的归纳总结。     

房建工程基坑支护实施重点分析

基坑支护是确保城市房建工程安全的重要环节,基坑支护施作不当会导致工程结构强度不符合技术指标要求。基坑支护需要结合工程所在地的地质水文条件确定合理的技术措施,制定科学的施工方案。结合工程实例,探索在地质结构复杂且多雨季节进行基坑支护施工的方法,分析基坑土钉墙施工、双向螺旋挤土灌注桩施工及基坑降水排水的技术要点,明确基坑支护施工的重点工作。     

预注浆技术在竖井施工中的应用

如何顺利通过破碎带富水层及溶洞发育地带是竖井施工所面临的重要工程地质问题。湖南宝山矿根据所施工竖井的特点及工程地质条件,采用了预注浆方案处理地下涌水。着重讨论了此次预注浆设计中注浆压力、注浆范围及扩散半径等设计参数的确定方法;并对注浆方式、钻孔布置方式及注浆工艺、结束标准及效果评定做了介绍。     

复合材料变截面进气道模具设计及工艺方案研究

对现有的金属模具及水溶性模具方案进行研究,在此基础上设计出组合式复合材料模具方案,确定了方案中复合材料易碎层的工艺参数,并制备了复合材料进气道,为复合材料进气道及其他复杂型面产品的整体成型技术提供了一定的参考。     

浅谈水泥厂增湿塔的设计及工艺选型

首先对干法水泥厂增湿塔的性能特点、、结构及工作原理作简单介绍，接着重点从规格的确定、喷水量的确定、喷嘴的选型及气流分布装置的设计等四个方面对增湿塔的设计进行阐述，最后介绍了工艺布置方案并列举了三个设计单位增湿塔设备的工艺选型参数。     

非等温固定床反应器设计及操作方案的选择

本文对正丁烷氧化制顺酐固定床反应器的参数敏感性进行了模拟分析。确定了万吨级生产装置适宜的设计及操作参数,并对反应器上段催化剂稀释与不稀释,以及双段熔盐循环的方案进行了比较。结果表明以双段熔盐循环系统效果最好。     

建筑深基坑降水标准化设计与施工

随着城市建筑高度的增加,根据构造及使用要求,基础埋置深度也不断增加.本文通过对基坑降水施工时间与勘察时间间隔、周围基坑工程对所研究工程的水位影响,降水施工动态控制等进行分析,最后又对基坑工程中降水井本身的影响进行了简单的分析.     

陶瓷过滤机在磷精矿脱水工艺中的应用

为了降低磷矿的物流成本,采用陶瓷过滤机对磷精矿浆进行脱水处理。介绍了陶瓷过滤机的结构及工作原理,以及在磷精矿脱水工艺应用中存在的问题及整改措施。通过在工艺与设备方面对陶瓷过滤系统进行整改,使得脱水后的磷精矿中w(H2O)达到12%,产能基本达到了设计要求。     

Data Analysis and Modeling of Constant Pressure Batch Dewatering of Fine Particle Suspensions

The problems of data analysis and modeling of experimental constant pressure batch dewatering of materials forming compressible cakes are considered. Dewatering in these materials is typically completed in two stages, viz. cake formation and cake consolidation. A data representation method especially useful for determining the transition point between the filtration and consolidation stages, as well as for comparing accuracy of model predictions, is illustrated. It is shown that dewatering occurs via one of three qualitatively different pathways. A simplified model for engineering analysis of the process is presented. A time-invariant spatially uniform volume fraction of solids approximation is invoked in the cake formation stage. A time-dependent spatially uniform volume fraction of solids assumption is made in the cake consolidation stage. The two models contain four model parameters and have a common physical basis in Darcy's law. Interrelationships between key process parameters are determined and employed to predict the temporal evolution of dewatering in the cake consolidation stage as well as the end point of dewatering.     

湿式除尘器中波纹板脱水技术的研究

针对湿式旋流除尘器体积大、阻力大、脱水效率低的问题,对波纹板脱水的临界风速和阻力等关键参数进行了分析计算,并通过除尘器试验平台进行验证性试验,为除尘器脱水段的改进设计提供了依据。将波纹板脱水技术应用于KCS550湿式旋流除尘器脱水段的改进,有效减小了除尘器整体长度、重量和阻力,提高了脱水效率。     

Statistical evaluation of hyperbaric filtration for fine coal dewatering

A statistical design of parametric study of pressure filtration for fine coal dewatering is presented. The effects of five major parameters of the dewatering, i.e. applied pressure, filtration time, cake thickness, solids concentration and slurry pH, on cake moisture reduction and air consumption were investigated. The study was conducted starting with two level factorial experiments to identify the most significant parameters, and concluding with response surface methodologies to establish an optimum operating condition for the dewatering of fine coal. It was observed that applied pressure, cake thickness and filtration time were identified to be the key operating variables for reduction of filter cake moisture as well as air consumption. With the key parameters, an optimum condition for the dewatering was determined to be an applied pressure of 93 psi with a cake thickness of 2.5 cm and a filtration time of 4.8 minutes for the laboratory filtration system. At these optimum conditions the filter cake containing about 22 percent moisture by weight and consuming air by 4.1 m³/(m²·min·kg) on dry solid basis was obtained.     

污泥脱水设施在净水场排泥中的应用

本文介绍污泥脱水设施在净水场排泥中的应用。污泥脱水设施的应用使清水全部回用,污泥外运处理,从根本上解决了环境污染问题。文章从卧式螺旋卸料沉降离心机参数及污泥特性两方面阐述了两者与污泥脱水效果的关系,为获得较好的污泥脱水效果提供了依据。     

Method to Characterize the Air Flow and Water Removal Characteristics during Vacuum Dewatering. Part I—Experimental Method

An experimental method using a novel design to characterize the air flow and water removal during vacuum dewatering in paper manufacturing is discussed. The experimental setup involves the intermittent application of vacuum, similar to commercial systems, using a rotating disk with slot opening arrangement. The system is capable of commercially realistic residence times of the order of milliseconds. The intermittent application of vacuum simulates vacuum dewatering on commercial paper machines. The air flow rate is calculated from changes in pressure and temperature in the vacuum tank underneath the sample. The role and importance of air flow during vacuum dewatering is studied by accurately measuring the air flow, properly taking into account the leaks during vacuum dewatering. The method described here provides for the first time accurate air flow and water removal data during vacuum dewatering. Methods of analysis of the experimental data are also presented. This information can be used to better understand the water removal process as well the role and importance of air flow during vacuum dewatering.     

Method to Characterize the Air Flow and Water Removal Characteristics during Vacuum Dewatering. Part I—Experimental Method

An experimental method using a novel design to characterize the air flow and water removal during vacuum dewatering in paper manufacturing is discussed. The experimental setup involves the intermittent application of vacuum, similar to commercial systems, using a rotating disk with slot opening arrangement. The system is capable of commercially realistic residence times of the order of milliseconds. The intermittent application of vacuum simulates vacuum dewatering on commercial paper machines. The air flow rate is calculated from changes in pressure and temperature in the vacuum tank underneath the sample. The role and importance of air flow during vacuum dewatering is studied by accurately measuring the air flow, properly taking into account the leaks during vacuum dewatering. The method described here provides for the first time accurate air flow and water removal data during vacuum dewatering. Methods of analysis of the experimental data are also presented. This information can be used to better understand the water removal process as well the role and importance of air flow during vacuum dewatering.     

WZT1400大型卧式振动离心脱水机的研制

介绍了WZT1400大型卧式振动离心脱水机的研制过程,确定了主要结构与机型、脱水工艺参数,根据动力学模型计算了动力学参数,选择了主振弹簧刚度、激振力、筛篮回转电动机、振动电动机的型号;该设备具有多项创新技术,可靠性高,脱水后的产品水分低。