YDYY-3000型带式压滤本几在大明矿选煤厂的应用

介绍了YDYY-3000遥控液压带式压滤机的工作原理、技术指标及优点。通过对2种压滤机压滤效果的对比分析，说明YDYY-3000遥控液压带式压滤机压滤效率高、连续作业好，提高了煤泥处理能力，有效保证了洗煤生产。最后分析测算了选煤厂经济效益，YDYY-3000遥控液压带式压滤机投入运行后，为选煤厂节省药剂费用3．08万元／a，达到了减员增效、节电降耗的目的，经济效益显著。     

压滤机无人值守技术在博选新河选煤厂的应用

新河选煤厂利用液位控制原理进行电路设计,实现浓缩机底流泵、压滤机入料泵的自动开停和压滤机压滤效果的判断,从而使压滤机实现自动运行,无需人工操作,压滤车间实现了无人值守,节约了人工成本,取得了很好的经济效益。     

杏花矿选煤厂尾煤压滤系统的改造

杏花矿选煤厂在多次技术改造后,原煤处理能力提高,针对尾煤处理系统能力不足的情况,该厂又采用2台KZG250/1600型快开式隔膜压滤机替换了原压滤机;论述了新型压滤机的工作原理、技术特点以及辅助系统改造方案,改造后提高了煤泥处理能力,降低了滤饼水分,经济效益和社会效益显著。     

煤泥压滤机自动控制系统的建设与应用

针对现阶段选煤厂压滤机在自动化控制方面存在的问题,采用工业以太网将压滤机电控系统与压滤车间内的交换机相连接,实现压滤机与上下游设备间的数据传输,同时监控中心可以实现对压滤机运行状态的监控,提升了压滤车间的自动化水平,降低了工人人员劳动强度,对选煤厂效益提升具有一定的推动作用。     

东辰公司煤泥超高压压滤脱水的可行性研究

针对东辰公司选煤厂原有压滤机压滤煤泥水分高、掺销影响经济效益等问题，采用超高压压滤机对浓缩机底流进行压滤试验。结果证明：压滤煤泥水分比2023年1—5月降低10.14%,发热量提高2.33 MJ/kg,滤饼破碎后粒度均匀小于10 mm、人工挤压不成团。测算超高压压滤机改造经济效益显著，投资回收期短。     

超高压压滤机在王洼选煤厂煤泥水系统的应用

为了解决王洼选煤厂压滤煤泥产品水分偏高，发热量偏低，无法掺入末煤产品销售的问题，通过对煤泥压滤系统进行部分改造，选用2台STC型超高压压滤机替代现有2台快开隔膜压滤机处理煤泥，达到降低煤泥水分，提高煤泥发热量的目的。改造后，煤泥经过破碎掺入末煤产品，作为动力煤销售，销售情况良好，提高了企业经济效益的同时，也解决了煤泥滞销带来的环保问题。     

浮选精煤采用快开式隔膜压滤机脱水的实践

平沟选煤厂浮选精煤脱水系统存在滤液浓度和产品水分高、设备老化严重等问题,采用KZG300/2000-U快开式隔膜压滤机进行改造,取得了很好的效果,与原来的PG116-12型圆盘真空过滤机相比,改造后提高了浮选精煤产率,降低了产品灰分,获得了较好的经济和社会效益。     

谢桥选煤厂新厂煤泥回收系统的优化改造

谢桥选煤厂新厂原设计矸石磁选尾矿直接进二段浓缩机,底流压滤回收,该工艺存在的主要问题是:压滤煤泥灰分高,不能作为产品销售;浓缩机底流易堵塞,影响正常生产;压滤机煤泥量增加,影响加工成本。通过在生产实践中试验论证、优化工艺,对局部进行了技术改造,实现了矸石磁选尾矿合理分级回收,使系统更加趋于合理完善。     

KM500/2500型快速压滤机的研制及应用

介绍了KM500/2500型快速压滤机的技术参数、过滤机理及机架部分、过滤部分、滤板拉开机构、液压系统、电控系统等各组成部件的特点;论述了快速压滤机在淮南潘一矿选煤厂、张集矿选煤厂的发展应用情况;实践表明,该机占地面积小、压滤时间短、处理量大、自动化程度高、运行稳定。     

穿流式压滤机对选煤厂极细煤泥脱水的可行性研究

由于斜沟煤矿选煤厂的压滤煤泥粒度逐渐变细,现有快开压滤机压滤周期变长,滤饼水分高,导致煤泥掺入洗混煤的比例受到限制,影响了企业经济效益,也造成了环境污染;介绍了穿流式压滤机的结构及工作原理,并通过半工业试验验证了穿流式压滤机显著的脱水效果;提出以穿流式压滤机来替代原有快开压滤机的改造方案,可行性论证表明,该方案的实施不仅可提高产品煤销售收入,增加企业经济效益,而且可以保护矿区生态环境。     

陶瓷过滤器脉冲反吹时滤管外压力波形的测定与分析

利用压电式压力传感器测定了滤管外的压力波形,分析了喷吹压力、脉冲宽度等因素对滤管外压力的影响。实验结果表明,在脉冲反吹时滤管外附近区域的压力波衰减轻快,而离滤管壁一定距离后压力波则在过滤器内均匀传播。同时证明在脉冲及吹过程中,集气室对相邻滤管间相互影响具有重要作用。     

LOGO!可编程逻辑继电器在PTA装置上的应用

利用LOGO!可编程继电器,对影响PTA装置生产的部分控制系统进行了改造和优化,如空压机润滑油压开关三选二控制,氮气压缩机报警指示盘的功能恢复,袋式过滤器反吹系统定时吹扫功能的实现,并详细介绍了具体实施方法及经验。LOGO!方便、简单,在氧化装置得到了充分利用,为PTA平稳生产提供了保证。     

The Permeability Distribution (PD) Method for Filter Media Characterization

Cake filtration is frequently used for the removal of particulate solids from fluids in industrial processes. The build up of a filter cake is usually accompanied by a decrease in overall permeability of the filter leading to an increased pressure drop over the filter medium. For an incompressible filter cake that builds up on a homogeneous filter cloth (surface filtration mode), a linear pressure drop profile is expected over time. However, occasionally experiments show curved pressure drop profiles. Whereas pressure drop profiles with increasing slope are generally ascribed to cake compression and/or depth filtration, pressure drop profiles with decreasing slopes are only ascribed to inhomogeneities in the filter. Such inhomogeneities can arise due to filter cake patches and/or an inhomogeneous filter cloth itself. In this work a method is proposed that transforms the pressure drop profile of a filter into a permeability distribution (PD) of the filter medium, thus accounting for possible inhomogeneities of the medium. The determination of the PD is looked at as an inverse problem of an integral transformation. The method is applied to experimental filter pressure drop data of laboratory scale jet-pulse cleaned bag filter plants. It is found that even clean filter media can exhibit a significant permeability profile.     

BLZG38型全自动立式压滤机的开发设计

简要叙述了BLZG38型全自动立式液压式压滤机的结构组成、主要技术参数、工作原理及过程、关键技术设计、设计特点,认为BLZG38型全自动立式压滤机的研发比较成功,其适用范围较广,可以作为新产品投入市场进行推广使用。     

转鼓加压过滤机的特点及在化工行业中的应用

介绍了转鼓加压过滤机的结构特点、工作原理、工作流程及在化工行业中的应用,并与传统的离心机进行了对比。认为转鼓加压过滤机属国内首创、技术水平达到国际先进水平,特别是在化工行业的应用中更凸显出该设备的优异性能。     

沉降离心机分离沉淀硫酸钡试验研究

阐述了硫酸钡生产过程中固液分离工艺目前存在的现状,提出了用卧式沉降离心机来代替该行业常用的真空叶片机或厢式压滤机,并优化卧式沉降离心机的工艺参数是:转速3 000转/分、溢流直径138毫米、差转速30转/分,利用该设备能减少硫酸钡的损失,提高硫化钠的回收率。     

气固错流移动颗粒床过滤器压降特性研究

研究了错流移动颗粒床过滤器操作压降与过滤介质特性、表现过滤气速、颗粒层移动速度和床层粉尘沉积量之间的关系。结果表明，无粉尘沉积时，床层压降可以用Ergun方程计算。颗粒层移动速度的变化并不会造成床层压降的显著变化。除尘过程中，床层内粉尘沉积量随气体中粉尘浓度的增大、颗粒层移动速度的减小而增加，同时将导致床层压降的显著增大。错流移动床除尘操作压降可以用带修正项的Ergun方程计算，其修正项为比沉积率和颗粒层空欧率的函数。在实验数据范围内，该方程的计算结果与实验数据最大偏差小于15％。     

金属丝网过滤器性能影响因素研究

对金属丝网过滤器性能的影响因素进行了综合分析,为过滤器的良好运行提供建议。在分析过滤机理的基础上,从过滤效率、压降、残余压降三个方面,分析了过滤器性能的影响因素,包括丝网结构、循环次数、过滤速度、流体浓度及温度、颗粒粒径、滤饼的可压缩性、最大允许压降、反吹压力等。结果表明,各因素之间互相影响,实际过滤过程中须综合考虑,以达到过滤器的预期性能。     

Effects of the operational parameters on carbon recovery and water flux in ultrafiltration using fractional factorial design

The distribution of molecular weight of natural organic matter on the effect of operational efficiency for water treatment units is very important, like coagulation, the biological activated carbon, and chlorination. This work discusses the following three topics: (1) The properties of humic acid were compared using fluorescent spectrometry and optical spectrometry; (2) the variations of carbon recovery and the water flux in the membrane filter after repeated rinsing with a 0.1 M sodium hydroxide and 10 ppm NaOCl mixed cleaner and reuse; and (3) the effect of operational parameters, such as the concentration of humic acid, the operating pressure, the mixer speed, and the fractional reduction in retentate volume, on the membrane filter during the fractionating of organic matter in a stirred cell using Statistica 7 software with fractional factorial design. Humic acid yields both fluorescent peaks of both 240/440 nm and 450/510 nm. Fluorescent organic matter with an emission wavelength of 510 nm can be removed using a 5 kDa polyethersulfone membrane filter with rinsing for 90 min. Rinsing with a mixed cleaner reduced both carbon recovery and water flux, but especially the latter. NaOCl solution included in the mixer cleaner should be considered not only because of its ability to destroy organic matter but also because it might transform the properties of the cleaning membrane surface. With respect to the absolute magnitude of the effect of the four factors on the water flux ratio, the humic acid concentration affected the carbon recovery more than the other three factors. The humic acid concentration is negatively correlated with carbon recovery. The operating pressure more strongly affects the water flux than do any of the other parameters. Furthermore, the operational pressure was positively correlated with the water flux.     

The concentration of mammalian cells in a tangential flow filtration unit

A tangential flow filtration unit is described through which cell suspension is continuously recycled. A pressure drop is incurred across the filter which forces liquid through the filter sheet, and cells in the remaining suspension are thus concentrated. The unit described has been used to concentrate 4 1 of cell suspension containing at least 2 × 10⁶ cells/ml 12-to 23-fold in 2 to 4 h, with 94% viable cell recovery and little loss of viability. The filter is amenable to scale-up and a pilot scale version is under test in this laboratory.