陶瓷成型用多孔塑料模具的研究进展

微孔塑料模具替代传统的石膏模具,是当今陶瓷成型用模具的重大突破,是陶瓷成型用模具的发展方向。着重阐述了微孔塑料模具的几种制备方法和各种制备方法的优缺点,介绍了其在工业应用中的情况,并阐明了其发展趋势。     

陶瓷精加工新方法

随着工业陶瓷技术的进一步的发展,其应用范围也越来越广。由于陶瓷具有耐高温、耐磨等一系列优异特性,陶瓷不仅用在民用工业上,也已用在航天等尖端工业上,因此对陶瓷加工要求越来越高。如加工微孔,用传统的方法就无法达到,从而出现了一系列新的精加工方法。这里介绍一些国外已运用的精加工方法。     

陶瓷成形用多孔塑料模具的研究进展

微孔塑料模具替代传统的石膏模具,是当今陶瓷成形用模具的重大突破和发展方向.笔者着重介绍了微孔塑料模具的几种制备方法和各种制备方法的优缺点,介绍了其在工业应用中的情况,并阐明了其发展趋势.     

硫铁矿用陶瓷过滤机脱水的半工业试验

对硫铁矿用陶瓷过滤机脱水的工艺参数进行了研究 ,获得了令人满意的结果 ,认为陶瓷过滤机可替代其它脱水设备对硫铁矿进行脱水处理。     

专利信息

微孔陶瓷过滤基板本实用新型专利为一关于对浆体物料固液分离及抽吸干燥的技术,例如矿山精矿脱水所用到的微孔陶瓷过滤基板及其制备方法的改进。其特征是在成形陶     

新型环保材料——微孔陶瓷

本文介绍了一种新型环保材料－－微孔陶瓷,叙述了微孔陶瓷过滤机理以及技术特点和工艺技术路线。     

陶瓷过滤机在磷精矿脱水中的应用

介绍了陶瓷过滤机工作原理,采用HTG-15-Ⅱ型陶瓷过滤机对磷精矿进行了工业生产试验,结果表明磷精矿滤饼水分大大降低,认为陶瓷过滤机可替代其他脱水设备对磷精矿进行脱水.     

陶瓷过滤机在磷精矿生产中的应用

介绍TC系列陶瓷过滤机的工作原理;描述陶瓷过滤机的结构;研究陶瓷过滤机在贵州川恒化工有限责任公司磷精矿脱水中的实际运行情况,并将陶瓷过滤机与带式过滤机的性能进行了比较。结果表明,陶瓷过滤机具有自动化程度高、真空度高、生产效率高、滤饼水分低、节能显著等优点;陶瓷过滤机用于磷精矿脱水,滤饼水分稳定在10%～13%(质量分数),比带式过滤机低10%;陶瓷过滤机是磷精矿脱水设备中较为理想的一种设备。     

陶瓷过滤机在硫化污泥脱水中的应用

介绍陶瓷过滤机在铜冶炼烟气制酸装置污水处理系统中的试验、选型及应用。陶瓷过滤机采用新型微孔陶瓷板为过滤介质，由转子、分配头、搅拌器、刮刀、料浆槽、真空系统、反冲洗系统和自控系统组成。对含固率(质量分数)为5％、pH值为1～2的硫化污泥脱水后，滤饼含水率(质量分数)约50％。设备操作方便，劳动环境好，材料未见明显腐蚀。     

陶瓷行业节能减排新技术--分述陶瓷坯体烘干环节与陶瓷窑炉余热利用新装置

前言
　　陶瓷生产过程中的坯体、模具的烘干环节是整个陶瓷生产过程中的重要环节。然而这一环节给众多的陶瓷生产企业造成了能耗大、污染重、环境差、经济效益低的后果。为了降低能耗、减少污染、改善环境、提高经济效益,陶瓷企业在苦苦地寻求一条烘干陶瓷坯体环节比较节能的新思路。     

搅拌充氧曝气技术动向及设备发展

介绍了新型搅拌散气曝气的技术原理,并说明其相对传统主流微孔曝气技术的优良性和节能性特点。搅拌散气曝气技术具有曝气性能好,动力效率高,能耗低,工艺适应性好的技术特点。通过标准活性污泥法的工程实例,实际处理量为（2．88～5．3）×10^4m3／d的污水处理厂,BOD去除率达90％,处理单位水量的消耗电量为0．0732kwh／m3,与同类曝气设备的应用进展情况对比表明,搅拌散气曝气技术因其控制的灵活性和节能潜力而具有广阔的应用及推广的可能性。     

Effect of Electro-Osmotic Dewatering on the Quality of Tofu Sheet

As a new dewatering technology with high efficiency and energy saving, electro-osmotic dewatering can be applied to food processing. The objective of this work was to study the effect of combined field dewatering (CFD) involving electro-osmosis and mechanical pressure on the quality of tofu sheet. Combined field dewatering was performed on the dewatering process of tofu sheet for 10 to 30 min at a voltage ranging from 30 to 50 V under various pulse-time ratio (t₊ = 120 s, t_- = 5 s) electric field and 0.047 MPa pressure field. The texture and structure of tofu sheet after treatments were examined by a rheometer and scanning electron microscope (SEM). The result showed that the three quality indexes, i.e., hardness, tensile strength, and ductility of tofu sheet near the anode were 45%, 30%, and 12% higher respectively than those dewatered by common mechanical pressure method. However, those near the cathode were 15%, 25%, and 10% lower respectively. When the electric field was applied for 10 min at 30 V, these indexes reached their maximum values. Meanwhile, the tofu sheet structure near the anode was more compact and homogeneous than that near the cathode. The result indicated that CFD could enhance the quality of tofu sheet.     

硫精矿应用国产TT系列陶瓷过滤机的脱水试验及生产实践

云浮硫铁矿应用国产TT系列特种陶瓷过滤机进行了硫精矿脱水试验及工业生产,结果表明:陶瓷过滤机与传统外滤机相比,过滤性能优越,节能效果显著,滤饼水份下降1.28%,水电消耗分别节约44.76%、55.77%.     

Hydronet技术对脱水车间废水的试验研究

瑞士Hydronet高效气浮技术,应用＂零速度＂原理、高效溶气管ADT及集成电路计算机遥测技术ICT,具有高效快速去除水中悬浮物的特性。该技术运用于某水质净化厂一级强化处理后的化学污泥脱水车间废水处理,污染物的去除率分别为COD92%,TSS 96%,总氮79%。该高效气浮设备适合处理脱水车间废水,出水基本符合废水回流要求,达到省地和节能目标。     

Functionalized Cellulose Fibers for Dewatering and Energy Efficiency Improvement

Paper drying accounts for nearly 80% of the energy used in the papermaking process. This is due to the high energy requirements for the process of drying by vaporization. Because the cost-effectiveness of the various physical means of dewatering far exceeds that of thermal drying, significant energy savings can be expected if the physical dewatering effectiveness is improved. To that end, a novel method of enhancing the physical dewatering process that involves the addition of hydrophobic fibers to the pulp furnish is described and evaluated. Freeness and water retention measurements indicate that the addition of hydrophobic fibers at even a few weight percent may have a significant impact on the freeness and water retention properties of the furnish and therefore a significant improvement in the effectiveness of the physical dewatering of webs made using the hydrophobically tailored furnish material.     

Comparison of horizontal and vertical electric field in the treatment of river sediment by electro-dewatering

The aim of this study was to evaluate and compare the effectiveness of horizontal (H-EDW) and vertical (V-EDW) electro-dewatering fields, in terms of dewatering and energy consumption, for the treatment of river sediment. The influence of the sludge thickness (3, 4, 5, 6, 7?cm) and the applied voltage (10?30?V) were examined. V-EDW was found to significantly improve dewatering and reduce process time, while H-EDW has the potential to save energy but results in sludge containing greater moisture. As the applied voltage was increased from 10?V to 30?V, the final dry solids content and energy consumption increased for both modes. Increased sludge thickness from 3?cm to 7?cm was found to have a negative influence on the final dry solid content of the sludge for V-EDW, but is not a significant influence with H-EDW. The results demonstrate that H-EDW is an effective dewatering method and has potential for continuous operation and energy efficiency for industrial-scale applications.     

Gewinnung von Brennstoff für Kraftwerke aus Klärschlamm

Production of a combustible for coal-fired power stations based on sewage sludge . This article describes various means of achieving more extensive mechanical dewatering of sewage sludges. The heat content of the sludge solids can become available for combustion processes. The sludge filter cakes obtained by the “CarboSed” process can be disposed of with minimum energy consumption by fluidized bed combustion or be used after appropriate work-up as a combustible in coal-fired power stations with full exploitation of their heat content for generation of steam and electric current. Partial substitution of primary energy sources such as coal and fuel oil by sludge filter cake is feasible in all cases. The processes thus make a contribution to the saving of energy resources and the disposal of sludge.     

Thermal Dewatering (TDW) to Reduce the Water Content of Sludge

Thermal dewatering describes the process whereby a heating plate and heat supply unit are incorporated into a filter press system to improve separation of water from sludge. The performance of our thermal dewatering system for both wastewater and waterworks sludge was measured and compared with mechanical dewatering in terms of water content, dewatering velocity, cake specific resistance, and energy consumption. Dewatering velocity was improved by a factor of two, cake water content was lower, and specific cake resistance was improved. However, energy consumption was higher. Thermal dewatering systems may be economical and have practical application to improving dewaterability.     

几种测定化学需氧量方法的比较

采用重铬酸钾法、节能加热法和快速法对不同种类的废水进行化学需氧量测定,结果表明：3种测定方法的准确度和精密度均符合要求,与传统的重铬酸钾法相比,后两种方法更节能环保,且能同时分析大批量水样。     

A Study for Development of Real-Scale Thermal Filter Press Dewatering (TFPD)

Real-scale thermal filter press dewatering equipment (plate size: 630 mm × 630 mm) was installed and operated at a waterworks for one year in an attempt to achieve sludge reduction. During the period, the dewaterability was evaluated according to the seasonal sludge properties in order to compare the dewaterability of thermal dewatering and mechanical dewatering, as well as to determine the economics of thermal dewatering. According to the results, the winter season sludge showed a 36% decrease in water content and a two-thirds reduction in dewatering velocity compared to the summertime sludge. In addition, the dewatered cakes of the thermal filter press dewatering equipment showed a lower specific cake resistance and water content in the dewatered cakes than the mechanical filter press dewatering equipment, indicating superior dewaterability. This was attributed to the easier removal of the filtrate remaining in the capillary tubes due to thermal dewatering. The energy consumption for thermal dewatering was 300 kJ/dry solids (DS) kg. A comparison of the sludge dryers indicated that it is possible to produce dewatered cakes that consume less energy and can be recycled. According to the performance evaluation results, the real-scale thermal filter press dewatering equipment had high adaptability to the changes in seasonal sludge, showing excellent dewaterability compared to the mechanical filter press dewatering equipment, and was economical due to the lower energy consumption.