水平式真空脱滤机功能对比PPT学习教案

1、会计学1水平式真空脱滤机功能对比水平式真空脱滤机功能对比VACUUM FILTERS : PROCESS STEPS真空过滤机：工艺步骤 l Cake formation, 滤饼形成l Cake washing ( if required) 滤饼冲洗（可选） l Cake drying 滤饼干燥l Cake discharge 滤饼排放Vacuum filtration 真空过滤第1页/共37页Equivalent system with traditionnal pressure filters传统压滤机系统传统压滤机系统NOTA : Filter # means dual filter f

2、or continuous process注意：每处带滤机都需要双倍的带滤机以满足连续工艺的要求Vacuum filtration 真空过滤第2页/共37页INDUSTRIAL VACUUM FILTERSl Filter 过滤机l Filtrate receivers 滤液接收灌l vacuum pump 真空泵l Filtrate extraction devices 滤液萃取装置 pumps 泵 barometric pot 开口罐 Self extractors tanks 自萃取罐An under vacuum filtration unit is composed by:一台真空过

3、滤装置有以下部分组成：第3页/共37页INDUSTRIAL VACUUM FILTERS工业用真空过滤机Filtrate receiver滤液接收灌Cake washing滤饼冲洗Slurry料浆Cake discharge滤饼排放Filtrate滤液Vacuum pump真空泵Vacuum filter真空过滤机Filtrate extraction :滤液抽取滤液抽取Extraction pump抽取泵Or或者Barometric leg开口罐Or或者Auto-extractor receiver自动抽取器第4页/共37页TYPE OF EQUIPMENT 设备类型 l Horizonta

4、l belt filter水平带式过滤机Moving support : Belt 移动支撑：皮带l Rotary vacuum drum filter,真空转鼓式过滤机Moving support : Drum 移动支撑：转鼓l Rotary vacuum disc filter, 转盘式过滤机Moving support : Disc 移动支撑：转盘l Table filter 翻盘式过滤机Moving support : Table 移动支撑：翻盘第5页/共37页Horizontal vacuum belt filter水平真空带式过滤及 Slurry InletWashingInlet

5、DRYINGWASHINGFILTRATIONCAKEDISCHARGE第6页/共37页Horizontal vacuum belt filter 水平真空带式过滤机Features :特点：特点：lSupport (belt) horizontally positioned支撑（皮带）水平安装Adequate piston effect for washing (either co-current or methodic)优化冲洗效果 For settling pulp, optimization of the geometry of the cake优化滤饼的颗粒分布lNo potenti

6、al cracks in the cake ( washing efficiency 99%)滤饼内部无裂缝（冲洗效率99%）lCan treat difficult slurries ( settable, high viscosity, .) 能处理各种有难度的料浆（高粘稠性）lNo residual volume无残留l Wide range of adjustment for operation ( feed solid content may vary),运行宽度的调节（进料固体的含量会变化）lLow maintenance cost ( because of updated eng

7、ineering) 低维护成本（以为最新的技术）lNo need of protracted supervision,无须长时间的现场监管l Exceptional utilization rate ( 98%)优异的利用率（98%）第7页/共37页Horizontal vacuum belt filter 水平真空带式过滤机Disadvantages :缺点：缺点：lspace required,l需要的空间l incompatibility with solvents,l和溶剂不相溶 ltotal hooding ( tight enclosed) is difficult for imp

8、ortant surfaces.对重要表面做整体护罩很困难第8页/共37页Rotary vacuum drum filter 转鼓式真空过滤机 第9页/共37页Rotary vacuum drum filter 转鼓式真空过滤机Features特点特点hlow space requirement ,所需空间小hpossibility to cover filter,可覆盖过滤机hpossibility to make a airtight filter,h可以做成密封的过滤机hhigh availability ( 95%) ,高利用率( 95%) hlow investment cost ,

9、 operation cost, power cost,h低投资，运行成本，能耗成本hprocess flexibility (NR, TS, NP, RL, RP, String, CA, SP types )工艺的灵活性hmay work with solvent or in very corrosive atmosphere (PP)可以与溶剂一起运行， 或可以在强腐蚀性环境运行hmay be used as a clarifier (NP type)可以作为澄清器用hgood dryness performance ( RP type)优良的干燥效果hworldwide more us

10、ed vacuum filter solution.h世界范围内使用较多的真空过滤机类型第10页/共37页Rotary vacuum drum filter 转鼓式真空过滤机Disadvantages :缺点缺点lWashing efficiency,冲洗效果lCannot be used for high density pulps,不能用在高粘稠度料浆上l Difficulty when fluctuant feed solid content,不能用在固体颗粒含量变化大的料浆上l High transport cost ( cannot be shipped dismantled)高运输

11、成本（无法拆卸后船运）第11页/共37页Rotary vacuum disc filter 转盘式真空过滤机第12页/共37页Rotary vacuum disc filter 转盘式真空过滤机 Features特点特点i very large filtration area,非常巨大的过滤空间i simple conception 简单的结构i low exploitation cost 低开发成本 Disadvantage :缺点缺点i No cake washing possibility 不能冲洗滤饼i only use for product easy to filtratei只能用

12、于过滤容易过滤的产品第13页/共37页Table filter翻盘式过滤机 第14页/共37页Table filter Features特点特点i Very large filtration area ( 250m ) ,i非常大的过滤面积i Few moving parts (compared to tilting pan filter) i更少的移动部件（相对于斜盘式过滤机）i Engineered for difficult atmosphere ( H3PO4)i专为挥发产品设计i Low operating costs,低运行成本i Higher productivity,高生产率i

13、 High availability高利用率i Very long life time非常长的使用寿命第15页/共37页Table filter 翻盘式过滤机 Disadvantages缺点缺点i High capital cost ,高成本iOnly designed for phosphoric acid application i专为磷酸产品设计第16页/共37页2 main types of washing process 两种主要的冲洗工艺Co current washing 正流冲洗l Often used经常使用l Easy to operate易于操作Slurry InletF

14、iltrateWashingoutletWashingInlet冲洗水入口 浆料入口 滤出液冲洗液出口第17页/共37页2 main types of washing process Methodic or counter current washing逆流冲洗 Slurry InletCloudy portFiltrateWashingoutletWashingInletUsed when problem of washing supply当冲洗水供应量有限时冲洗水入口 浆料入口 滤出液冲洗液出口浆料入口 浊液罐 第18页/共37页Caracteristics特点 第19页/共37页Proc

15、ess Competition 工艺比较l Filter press挤压机l Pressure filter (Larox type)压滤机（如LAROX）l Belt filter without rubber beltl无橡胶皮带的带式过滤机l Settling (Counter Current Decantation),l沉淀式（逆流沉降槽）lCentrifuges离心机l Cyclone separation漩涡分离l Screening筛分l U-filtrationU型过滤第20页/共37页Process Competition 工艺比较第21页/共37页PRESSURE FILT

16、ER压滤机It is not working under vacuum.非真空条件下运行It s a vertical press filter.垂直式压滤机第22页/共37页PRESSURE FILTER 压滤机lSqueezing by air or waterl通过空气或者水挤压lFiltration on horizontal plates在水平层面上过滤lDischarging排放 : Releving the plateslMoving the cloth松开夹层移走滤布lWashing or drying冲洗或干燥第23页/共37页PRESSURE FILTER 压滤机Featu

17、res特点特点l Very good dryness非常优秀的干燥效果l Minimal foot print占地面积小l No vacuum system required无须真空系统Disadvantages缺点缺点l Discontinuous filter非连续过滤的过滤机l Less washing efficiency ( Problem of dist.)冲洗效率低l High operating cost高运行成本l Low availability低利用率第24页/共37页PRESSURE FILTER 压滤机For your information.信息FILTRES PH

18、ILIPPEBrochures : 1975 PHILIPPE过滤机样本：过滤机样本：1975第25页/共37页BELT FILTER WITHOUT BELT 无皮带的带式过滤机No rubber belt, the Filtration cloth is directly in contact with trays无橡胶皮带，滤布直接接触托盘Trays托盘Cake滤饼第26页/共37页BELT FILTER WITHOUT BELT 无皮带的带式过滤机Cycle description 循环描述循环描述Vacuum is on 真空打开的时候真空打开的时候 filtration cloth

19、 is sealed on traysFiltration is performingTrays are moving forwardend of course for trays滤布密封在托盘上，托盘向前移动到尾部Vacuum is off 真空关闭真空关闭Trays is going back 托盘返回Trays in initial position 托盘回到初始位置Vacuum is on 真空再次打开真空再次打开第27页/共37页BELT FILTER WITHOUT BELT 无皮带的带式过滤机Features特点特点No rubber belt无须皮带 Consequences结

20、果结果Normally cheaper更便宜Can be installed for chemical application in which rubber is not allowed 可以在和橡胶不能共存的化学产品上使用 第28页/共37页BELT FILTER WITHOUT BELT 无皮带的带式过滤机Disadvantages :缺点缺点Cannot have large filtration area equipment不能做到较大的过滤面积Cracks in the cake due to stop of vacuum : Washing efficiency decrease

21、由于真空的停顿造成滤饼裂缝：冲洗效率降低Duration life of the cloth reduced : All the loads is supported by the cloth滤布寿命降低：所有的负载都由滤布支撑Filtrate cannot be clear because compromise between solidity&openingNon scalable equipment 由于固体和开口之间没有缓冲设备造成滤液浑浊第29页/共37页WARNING 警告Some customers are speaking about belt filters, but

22、 in their mind :一些客户谈论带式过滤机，但是在他们的概念里belt = Filtration clothbelt = Filtration cloth皮带=滤布Specially, when they want to compare our HVBF with :特别是当他们想将我们的HVBF和以下设备比较的时候：lPressure filter ( Larox type)压滤机lBelt filter without rubber belt无皮带的带式过滤机第30页/共37页COUNTER CURRENT DECANTATION逆流倾出Thick. n n-1Thick. n

23、 1Thick. n 2Thick. n nWaterSLURRYOverflorw n n-2Underrflorw n 3WashedpulpFeatures特点特点lNo filtration equipment无须过滤设备lVery low operating cost ( low energy cost)非常低的运行成本（低能耗）lLow maintenance 低维护成本第31页/共37页COUNTER CURRENT DECANTATION逆流倾出Thick. n n-1Thick. n 1Thick. n 2Thick. n nWaterSLURRYOverflorw n n-

24、2Underrflorw n 3WashedpulpDisadvantages缺点缺点lMaximal foot print 大占地面积lHigh water consumption高水量消耗lVery long response time长时间的等待lSolids are still in liquid phaselHigh capital costl固体仍然存在于液体中l高投资第32页/共37页Process Competitioncaracteristics 工艺特点比较第33页/共37页CONCLUSION结论 Even with good experience, we need to

25、 know environment of the problem :即使有丰富的经验我们也需要知道一下环境因素即使有丰富的经验我们也需要知道一下环境因素lSolids concentration固液比l Flow rate流量l Granulometry粒径分布l Temperature温度l Viscosity,粘稠度l Chemical apsect ( corrosive ? Toxic ?, which material ?)化学性质l Objectives of the plant ( productivity ?, dryness ? Performance ?)l工厂的意图（产量？干燥效果？性能表现？） l Filter aid ? Floculant ?过滤辅助l Allowable space for equipment ?设备的放置空间l Is there a p