Fouling Inhibition of Membrane Separation by H2O2/UV Pre-oxidation for Color Filter Effluent Reuse

This study evaluated the feasibility of treating color filter effluent by H₂O₂/UV pre-oxidation and membrane postseparation for in-house reuse. The effluent qualities were TOC of 5.8–34 mg/L, color of 46–138 ADMI, and conductivity of 1020–3500 μS/cm. Although the RO separation could directly remove TOC, color, and conductivity effectively, the serious fouling problem still existed. Through H₂O₂/UV pre-oxidation (UV = 13 W, H₂O₂ = 200 mg/L), organic and biofouling were inhibited to increase the normalized flux decline from 5% to 77%. That is, H₂O₂/UV pre-oxidation could mitigate the permeate flux decline as well as to improve the water quality for water reuse.     

Biodiesel Production Using Calcined Waste Filter Press Cake from a Sugar Manufacturing Facility as a Highly Economic Catalyst

For the first time, a low cost, high performance and environmentally friendly heterogeneous catalyst derived from waste filter press cake (FPC) from a sugar manufacturing facility was used for the production of biodiesel. This industrial waste was calcined in air at 900 °C for 2 h to convert it into an active CaO‐based catalyst (FPC‐HT). In addition, the calcium oxide nanoparticles (FPC‐NAC) were synthesized by surfactant‐hydration treatment of FPC‐HT. The synthesized catalysts were characterized by XRD, FTIR, SEM, TEM and BET analysis. These calcium oxide catalysts were used for a transesterification reaction between canola oil and methanol to produce biodiesel. The results show that the FPC‐NAC has higher catalytic activity than FPC‐HT under optimized reaction conditions. Therefore, this economic catalyst is able to catalyze the transesterification of canola oil to its methyl esters in 1.5 h with yields above 96 %.     

用表面活性剂助滤大冶铜精矿的试验研究

为降低大冶铁矿铜精矿的滤饼水分，进行了表面活性剂的助滤试验。试验研究了表面活性剂种类和用量、矿浆pH值、过滤压差及药剂添加方式等条件对铜精矿过滤过程的影响，结果表明，当矿浆pH=10，用量为125和140g／t时，助滤剂TS-2和TS-1既能提高过滤速度，又能降低滤饼水分约3个百分点。若采用分段—喷洒加药方法，效果更佳。     

ZYLD自动压滤机控制系统的改进

ZYLDⅡ型自动压滤机新增设了电流传感器、电流采集模块和液晶触摸屏 ,实现了脱水工艺参数———进料时间、压榨时间、吹气时间可以随工况条件变化随时调整 ;滤板压紧程度由主电机电流控制 ,主电机电流可预先设置在触摸屏上 ,并且可根据隔膜新、旧情况设定合适的电流     

XAZ340—4GF反洗压滤机的研制与应用

详细介绍了XAZ340—4GF反洗压滤机的研制过程,介绍了该机型的结构、原理、工艺系统。并简要介绍了其工业应用情况。     

一种高效过滤亚微米级细颗粒的新液固过滤技术——表层过滤

论述一种新的可高效过滤液体中亚微米级细颗粒的表层过滤技术,分析了表层过滤技术的特点、过滤模式、表层过滤基本条件和设计计算中所必需的数学模型。介绍了表层过滤技术在我国工业生产上推广应用的概况。     

数字滤波器仿真软件评估的谱分析方法研究

本文讨论了仿真模型验证常用的技术方法,针对数字滤波器仿真软件的特点,提出了采用谱分析的方法进行可信性评估.以双线性变换法设计的IIR数字滤波器仿真软件的可信性评估为例,应用Matlab软件分别采用程序设计法、基于SPTool的频谱分析方法和基于Simulink的频谱分析方法实现了对数字滤波器仿真软件滤波结果的频谱分析.     

柴油机颗粒捕集器的怠速再生性能试验研究

基于轻型柴油机台架,加装一套排气管喷油的主动再生系统,探究催化型柴油机颗粒捕集器(CDPF)在发动机怠速时的主动再生性能。研究发现：CDPF压降受来流空速、温度和碳载量的影响,空速、碳载量越高,压降斜率越大,压降与来流温度呈线性关系,实际情况中碳载量的判断需考虑空速和温度的影响。主动再生时,当空速一定,来流温度越高,达到主动再生目标温度(≧500 ℃)的喷油量越小;入口温度的变化率在1.74-2.20 ℃/(mg/s)范围内,即喷油量每增加10 mg/s,入口温度增加20 ℃左右。CDPF怠速再生时存在快速氧化期,此阶段颗粒物剧烈燃烧,CDPF出口温度会快速上升,同时压降下降明显。通过控制使CDPF入口温度锯齿形上升,有利于降低进出口温度差,再生效率可达90.55%。     

基于AD9901的高频高精度相位测量仪的研制

本文介绍了一种基于AD9901设计的高频高精度相位测量仪,介绍了电路的设计原理,并对相位测量仪的各部分电路逐一进行分析,最后分析了对实际电路的测试结果.     

厢式压滤机滤布自动冲洗机构设计改进与对比分析

介绍了厢式压滤机常用的几种自动冲洗滤布装置的结构、存在的问题及相应的改进。