CN1009212B - 用于流体动力混合的方法和装置 - Google Patents
用于流体动力混合的方法和装置Info
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Abstract
大量的流体物质在分配器(11)中混合,并使其以连续压力流体的方式流经混合区(13),其中所述物质通过连串锥形表面(24,27)和交替的各节流面(25)以及膨胀室(28)产生的紊流扩散面被充分混合。虽然各种流动物质可被有利地混合,然而典型的应用是实现空气和油墨颗粒充分的粘合,以便在去除再生印刷纸纸浆油墨的过程中获得有效的泡沫作用。
Description
本发明涉及流体动力混合,尤其涉及许多流动物质的混合,要求流动物质混合成用于加工系统的完全混合物,诸如造纸,但不限于造纸,其中一种物质可能是纸浆中的纤维材料,而另一种物质可能是必须和纤维材料完全混合的气态细颗粒物质。
作为一个例子,在去除再生的印刷纸浆油墨所获得有效而恒定的结果方面已碰到了一个重要的问题。这种去除油墨可以通过在纸浆中充分混入空气并使空气泡和尽可能多的油墨颗粒相接触来达到。接触空气泡的油墨颗粒基本上被分散成飘浮的气囊,其中空气泡将油墨带到表面上,而油墨随着泡沫在表面上扩大而消除。
为了加强混合,重要的是,即使在混合开始之前也要使空气在纤维悬浮体内均匀分布。混合的目的是要提高空气泡遇上并吸附油墨颗粒的几率。
迄今已借助于在空气/纸浆流中的许多带孔圆盘来形成紊流,使空气混合于纸浆内。虽然这种方法在某些情况下已相当地起作用,然而当纸浆中有长纤维时,有导致赌塞于圆盘周围的倾向。此外,尽管在每一圆盘的周围迅速形成紊流,然而因为圆盘间的区域对流体不起作用,因此在流体达到下一个圆盘之前紊流有明显衰减的趋势。纸浆中的纤维倾向于增强层流,这就限制了混合,并进一步加剧了紊流的衰减。液流的失速或减速导致了空气气泡的凝聚。
在该系统中的任何筛网,例如可用于空气加入到纸浆中去的处所,有赌塞的倾向,从而降低了效率。
在另一例子里,正处于漂白工序中的一种流动物质和另一种流动物质的充分混合是必须的,其中各种气体,诸如氧和臭氧,和诸如纸浆的流动物质混合。显然,为了获得高效率,正在漂白的物质和有待漂白的物质必须充分均匀地混合。
本发明的一个重要目的是要克服用于连续流动系统中混合并保持已混合好的流动物质的现有方法中所固有的不足、缺点、效率低、局限性、缺陷和各种问题。
本发明的另一目的是要提供一种新的并改进了的方法和装置,使流动着的气体和颗粒物质跟液体充分地混合。
本发明还有一个目的是要提供一种新的并改进了的方法和装置,它们特别适于在去除空气泡所带油墨颗粒的工序之前用于对反复循环的含有油墨的纤维纸浆进到有效地扰动掺气。
本发明的再一个目的是要提供一种新的并改进了的方法和装置,用于在一种连续的流动处理系统中对纸浆进行充分均匀的掺气。
本发明的另外一个目的是要提供一种混合装置,它对流体流动施加一连续的影响,从而消除了纤维纸浆迄今所经历的紊流衰减的倾向。
本发明的又一个目的是要提供一种混合装置,它以一种平静、连续的有效的方式形成强紊流混合。
本发明的还有一个目的是要提供一种形成三维混合的混合装置。
按照本发明的原则,提供了一种在具有一入口端和出口端的连续内流式通道中完成大量流动物质充分混合的方法,包括在实际的流
体动力学的压力下,把入口处的多种物质混合成一股充满内流式通道的连续流动流,使该通道中的流动受到扰动,并受到交替的径向向渐缩园锥形短扰动面和径向向外扩口园锥形长扰动面的一系列物质扩散效应,实现从一表面到下一表面流动的一连串急剧的扰动转变,从而使处于连续流动流体中的物质在从通道的入口端到出口端的过程中逐步达到越来越充分的扩散,并把经这样处理的流动从通道的出口端排到接收装置。
还提供了一种用于实施该方法的新的和改进了的装置。该装置包括一分配器,用以使流动物质在实际的流体动力学压力下和某一流体混合。所述装置内的混合区接受已混合的流体物质,该混合区具有等边的平缓的扰动作用面,基本上是敞通的,无纤维碍塞区,在所述流体流型内它被设置来施加一连续的和逐渐的扩散与混合扰动。
根据下面典型实施例的叙述结合附图,本发明的其它目的、特点和优点就会很容易明白。虽然在不背离体现在本公开说明书中的新概念的精神和范围的情况下,可以作出各种变型和改进,其中:
图1是一简图,其中本发明体现在用于去除再生印刷纸浆的油墨的装置内;
图2大体上沿图1中的Ⅱ-Ⅱ所取的放大破碎剖视详图;
图3是大体上沿图2的Ⅲ-Ⅲ线所取的剖视详图;
图4是类似于图2的破碎纵剖视详图,但表示处于该装置混合区通道入口端的分配器的改进;
图5是大体上沿图4Ⅴ-Ⅴ所取的横剖视图;
图6和图7公开了一种用于所述装置混合区的扰动组件的改进结构,
在图1中图示了一种工艺装置,它特别适于供造新纸用的再生的印刷纸纤维纸浆去除油墨。一股连续的纸浆流经输送管10输入到空气分配器,空气分配器位于内流式通道12的上流或入口处,内流或通道12穿过称之为混合区13的整个装置延伸。通道12在其下游或出口端排入到空气分离室14内。
在一种优选的结构里,上述分配器11包括一环形件15(图2和图3),环形设有一中心环形充气器或混合室17,诸如纸浆的流动物质经输送管10沿轴向输送到混合室。要和经导管10输入的纸浆混合的其它流物物质,诸如空气或任何其它所希望的气体或流体,通常沿环室15的园柱内径切向经孔口18喷入到腔室17内,孔口18和输送管19相连。因此,经该输送管18输入的物质喷入腔室17内成均匀分布,围绕并进入从导管10流入腔室的流体物质,产生涡旋。
来自混合室17的气体(即空气)和纸浆流在实际的流体动力学压力下流入通道12成为一充满通道的连续流。当该连续流进入并流经混合区13时,该连续流经受反复和累进效应的物质扩散和混合。在一种出于该目的优选方案里,所述混合区13被设置在一细长的园柱体管壳20内,输送管10以任何适当的方式固定在壳体20的上游或入口端,或者如图2所示做成整体,或者通过任何其它适当的液压连接。
安装在混合区13内的壳体20部分是一个包括一连串首尾相连的混合组件21的装置。每一组件21希望是一种大体上标准化的结构,并包括一个可滑动地安装于壳体20内的园柱体。这就允许组件21便于互换地装入壳件21内,并在希望更换时加以更换。每一组
件21具有一上游端,上游端具有窄的、在外经处轴向面对面的环形对接臂22,它在成对物之一的组件21下游端和完全相反的轴向面对面对接臂23相接触。换句话说,每一组件21具有一上游端对接臂22和一下游端对接臂23。为了和分配器环15的接触表面相互匹配和适应,串联的上游端组件或第一组件21具有一上游端对接臂表面22a,它可以比其余的组件21的相应对接臂表面22更宽些。
从每一组件21的上游端臂22的径向内侧面延伸,是一个同时沿径向和轴向向内延伸的环形截头锥的比较窄的漏斗形紊流表面24,它终止于一突变的过渡面25,后者处于很长的同时轴向和径向向外延伸的锥形、即截头锥形表面27的上游侧面,表面27向组件21的下游端臂23延伸。
在一种优选的结构中,组件21的外径大约为75毫米,表面24理想的尺寸是,大直径或外侧的直径约68毫米,在突变的过渡面或节流面25处的小直径约30毫米。业已发现,锥面24和组件21的直径间的大约15°小夹角是理想的。组件21的长度约75毫米,发现锥面和锥轴所夹的约15°小锥角是理想的。锥面24和锥面27的长度之比可以是1/4。在突变的交界处25,锥面24和27大体上相互成直角关系。锥面27的最宽端和锥面24最宽端交点处也明显成直角关系。在每一组件21内腔室28的流通面积从节流面25处窄的节流入口逐渐增加到大约5倍于腔室28出处的最大横断面区的横断面流通面积。虽然在所述腔室出口端和在节流入口端之间的5倍大的流通断面比对于某种给定稠度的纸浆是优选的,然而,这一比例可从2比1提高到8∶1,取决纸浆的种类,特别是纸
浆的稠度,因为稠度控制了纤维网络的强度,从而控制了使纤维网破裂所需的功率,这就是说通过流态化作用形成了紊流混合物。
正如将要看到的,在混合区13内的整个通道12长度上没有这样的表面,它使处于流体运动中的纤维趋于迟缓或迟滞。因此,尽管处于流动中的纤维,诸如对于再生的纤维纸浆,可能倾向于增强流动,从而阻止混合,然而,已经发现,突变的节流、紧跟着逐渐膨胀、通向另一个突变的节流的结构,形成了强紊流而不保持旋涡或其它不希望的流型。
在混合区13的工作中,从分配室17进入混合区13的混合流体物质的流动不断地受这些组件的影响,并当该流体流经混合区时被反复置于搅拌三向紊流的物质的影响之下,使处于通道12中连续流动中的物质逐步达到更充分的扩散和混合。在通道12的排出端,这些物质作为一种均匀的混合物流入浮选装置14。
沿着混合区13,顺着流体前进,在入口端,来自分配器11的物质由于碰撞在第一紊流面24上,而径受最初搅动的混合作用,然后在通过第一突变节流面25吋加速,接着紊流在第一串联混合组件21的腔室28中产生压力降。随着流体流径每一个串联的阻件21时,这一强有力的混合作用不断被重复,在混合物离开混合区13之前,混合物足以达到相当高的均匀度。由于没有采用极窄的节流面或障碍物而获得了紊流,便不会发生流体中纤维纸浆阻塞的问题。管样的形状产生了猛烈的三向紊流,从而使混合器本身具有自洁作用。
根据要被混合的流体物质性质,可以有许多串联的混合组件21,为了获得空气或其它气体跟纸浆的高度混合,这种纸浆在通过混合区时,为了得到所希望的混合均匀度,在一连串的紊流阶段要求多倍的
搅动。当流体流过混合区13时,在每一扰动或紊流阶段,在迅速流动着的流体内有愈来愈多的完全混合的物质,例如空气和纤维。由于流体衡撞各紊流壁面24,消除了任何流动不均匀的倾向,从而促进了混合,尽管该流动增加了纤维倾向,当流体向节流面25转向时,同样促进了紊流。在该流体中,经节流面25和突变过渡区到喇叭形表面27的速度和压力下降,从而控制了向腔室28的最大流通截面均匀膨胀,在每一组件21中,紊流混合得到改善。由于在混合区13内的每一阶段紊流和混合循环不断地重复,在最终排到分离室14的接收腔时,混合达到了最高效率,其中带有所接触的油墨的气泡作为一种泡沫29浮升到被搅动纸浆体30的表面。一真空抽吸设备将载有油墨的泡沫29排除。流入室14的完全混合的空气和纸浆的入口速度是控制的,以确保由于浮力和液体速度的结果,使带有油墨的气泡将会以泡沫29的方式被有效地抽吸。经清理的纤维纸浆流经一泡沫导流板32,并从隔墙33上溢出进入一排泄腔34,一排泄管35从这里把纸浆输送到其它的工艺位置,或者,如果需要,将其输送到另一个除油墨的工位,如有要求,可输送到筛选或其它的工艺工位。
出于同一目的,可能希望有一个分配器37,如图4和5所示。在这种结构里,大量流体物质在完全充满内流式腔室38中的一种连续流动流体内被混合,腔室38处于圆柱形细长壳体39内,壳体39在其上游或腔室38的入口端有一端壁40,靠近端壁40,一入口41最好把要混合的物质的较重部分,诸如纸浆,经壳体39的壁切向排入腔室38的最大横断面的整个容积区。一输入管收装有一喷咀43,轴向穿过端壁40,另一种物质,诸如空气或任何其它所
希望的气体或物质经喷咀轴向喷入到腔室38。处在喷咀43排出口中心的是喇叭形锥面45的顶端,沿着喇叭形锥面,来自喷咀43的物质的锥形薄膜或薄层向前移动,被包封在螺旋运动的物质流内,该物质是经入口44输入到腔室38内的。混合后的流体沿着喇叭面45以螺旋型的方式向下流到一环形突变过渡面47,该过渡面借助于壳壁39形成一文丘利孔口48。在文丘利孔口48处,沿锥面45移动的物质被高速推入经入口41输入到腔室38中的流体物质内。在孔口48的下游端,混合了的流体以高效混合物质效应、成扰动的方式被喷入到和混合区13′的上游端连通的空间49,混合区13′和图2的混合区相似,该扰动流动着的流体基本上按照该混合流体从图2的混合室17中输入的同样状态被输入到混合区13′。在混合区13′内,若愿意的话,如所示那样,组件21可更短些,但另一方面,大体上和图2中的组件21相同。
在一种理想的结构里,在锥形件50上可有锥形面45,前者具有一径向和轴向向内锥形的下游端表面51,锥形下游端表面51连接一同心的子弹头头部52,它突出于下游方向,并固定在诸如一径向向外延伸的支撑叶片结构53的装置上,支撑叶片结构53通常具有上游刀刃54,通常呈径向和轴向向内倾斜,基本上平行于表面51,并位于空间49的区域内,空间49在下游接近孔口48处接受处于非常剧烈扰动状态的混合物流体,确保免除了纤维材料的阻塞。
对于某些混合物来说,大量短的紊流增进级可能是理想的。在给定的混合区长度条件下,这可使各组件按图4所示那样缩短来达到。另一方面,一圆柱管形壳体55,和所述壳体20相似,可形成一混
合区57,其中具有一连串紊流发生组件58,每一组件的长度可以和图2中组件21的长度大致相等,但每一个组件是属于多级结构,并且如图所示,但不限于此,具有2个紊流发生级59。在其上游和下游端,一对组件58具有各自轴向面对面的环形面60和61,它们邻接成串联连接的组件58的各自相对的端面。每一级59具有一较短的径向向内、并在下游轴向倾斜的锥形紊流面62,依靠一突变的节流面63,它连接于一较长的径向向外、并在下游扩成喇叭形的锥形紊流面64,理想的情况是处在和表面24与27同样倾斜度的范围内,但各自比那些表面短些。节流面63的直径显著大于节流面25的直径,因此在混合区57内的通道65的最小直径大于通道12的最小直径。在组件断面59内的每个腔室67的下流端可以具有和腔室28下游端相同的直径。
因为除了多于一个的形式外,组件58的几何图形基本上和组件21相等,所以在多级59内沿组件58所出现的流体扰动的紊流效应大体上相同于组件21内所述的情况,但频率提高了,此外对于某一给定的流体动力学压力所允许的紊流强度可能要小些。然而,那里所需的混合强度可通过提高流径通道65的流体速度来补偿。
借助于光滑的环形表面以及它们在混合区13、13′、57内由本发明提供的配合,即使那里某些表面较为突变,在贯穿混合区的通道内的流体动力学的物质流中,得到的不仅是确保物质完全混合,而且避免了阻塞或流动物质的纤维缠住。还可指出,所述混合区没有运动部件,而是组件结构,不仅为制造提供了简便,而且为混合部件的装配、变换或更换提供了简便,以满足混合强度所需的变化。因而本发明提供了一种高效廉价的方法和装置。
虽然把本发明在使再生的纸浆除油墨方面的应用已选为主要的例子,然而其它的各种应用将是显而易见的。例如,本发明可用于造纸机流浆箱前的纸浆散凝作用。同样可以进行其它各种混合。诸如混合不同种类的纸浆,混合纸浆和化学物品及类似物。
应当明白,可进行各种变动和改进,而不背离本发明新概念的精神和范围。
Claims (23)
1、在具有一个入口端和一个出口端的连续流动通道内完成许多流动物质完全混合的一种方法,包括:
在一个所述入口端将所述大量流动物质在相当大的流体压力下混合到充满所述流动通道的连续流动的液流内;
按照一连串产生加速的交替邻接的径向向内收缩的较短的截头圆锥形紊流表面和产生逐渐扩散的径向向外扩张的较长的截头圆锥形紊流表面,使所述通道内的所述液流经受紊流以及显著扩散和混合效应;
从每一所述表面到下一个串联的所述表面使液流完成急剧的紊流转变;
通过因向外扩张表面而逐渐的膨胀和扩散,因向内扩张表面而相对较快的加速和节流以及膨胀和节流之间的急剧的转变,使液流在入口端和出口端之间受到连续的影响;
从而使处于自所述通道的入口端到出口端的连续流动液流中的所述物质获得逐渐的更加完全的扩散和混合;
然后,将这种经处理的液流从所述流道的出口端排出到接收装置。
2、按权利要求1所述的一种方法,它包括完成所述成涡流状态的混合。
3、按权利要求1所述的一种方法,它包括通过将一种所述物质轴向导入所述流体、并将另一种所述物质切向导入流体内来完成所述混合。
4、按权利要求1所述的一种方法,包括在和所述流通入口端连通的分配器内将所述物质混合。
5、按权利要求4所述的一种方法,包括通过使一种物质沿所述分配器内某一锥形表面轴向流动来完成所述物质的混合,并完成另一种沿所述锥面成涡流状态的物质的混合。
6、按权利要求4所述的一种方法,包括通过某一压力降来将欲混合的物质导入所述流通的入口端。
7、按权利要求6所述的一种方法,包括在所述压力降之前使所述混合物质产生涡流运动。
8、按权利要求1所述的一种方法,它包括输送一种像纤维状造纸纸浆的所述物质,并使其和某种气体混合。
9、按权利要求8所述的一种方法,其中所述纸浆包括再生的印刷纸,并把所述气体以空气的形式输入到纸浆,由于扩散和混合,使与油墨颗粒混合。
10、按权利要求9所述的一种方法,它包括把处理过的流体排入一油墨分离室。
11、在具有一个入口端和一个出口端的连续流动通道内完成许多流动物质完全混合的一种装置,包括:
用于将所述入口端的大量流动物质在相当大的流体压力下混合到充满所述流通通道的连续流动的液流内的装置;
用于使所述通道内的所述液流经受紊流以及显著扩散和混合效应的一连串产生加速的交替邻接的径向向内收缩的较短的截头圆锥形紊流表面和产生逐渐扩散的径向向外扩张的较长的截头圆锥形紊流表面;
用于从每一所述表面到下一个串联的表面完成液流急剧的紊流转变的装置;
用于使处于自通道入口端至出口端的连续流动的液流通过逐渐膨胀和扩散,自膨胀至节流的急变以及较快的加速和节流,连续地受到影响,从而促使包含在其中的物质逐渐获得更加完全的扩散和混合的一系列向外扩张表面和向内扩张表面和两者之间的突变过渡区的组合;
用于将这种经处理的液流排到接收装置的出口端。
12、按权利要求11所述的装置,其中所述用于混合的装置是设置来实现成涡流状态的混合的。
13、按权利要求11所述的装置,其中所述混合装置包括用于把一种所述物质轴向输入到所述流体内的输送装置和用以引导另一种所述物质切向进入所述流体的装置。
14、按权利要求11所述的装置,其中所述混合装置包括一个和所述流道入口端连通的分配器。
15、按权利要求14所述的装置,其中所述分配器包括一锥形表面,用以轴向接收一种所述物质、并包括一种装置,用以实现另一种所述物质的混合,使其沿着所述锥面成涡旋状态。
16、按权利要求14所述的装置,包括用以获得自所述分配器进入所述流道入口端的压力降的装置。
17、按权利要求16所述的装置,其中所述分配器包括用以使所述混合物质在所述压力降之前获得涡流运动的装置。
18、按权利要求11所述的装置,其中所述混合装置包括用以输送一种如同纤维纸浆的纤维物质的装置和把一种气体与所述纸浆混合的装置。
19、按权利要求18所述的装置,其中所述纸浆包括再生的印刷纸,而所述的气体混合装置将空气供给所述纸浆以便由于所述的扩散和混合作用附着于油墨颗粒。
20、按权利要求19所述的装置,其中所述流道将处理过的流体排入油墨分离室。
21、按权利要求11所述的装置,其中所述分配器包括一个形成圆环形分配器腔的环形体,用于把所述另一物质分布成涡旋状态的所述装置包括一输送口,用以把所述另一物质切向导入所述腔室。
22、按权利要求11所述的装置,其中所述分配器具有一个腔室,所述腔室其中具有一锥体件在锥体上游有一个突出的顶点,还有用以把所述一种物质导向所述顶点,并导向所述锥体件上的装置,以及用以使所述另一物质产生涡旋促使它沿所述锥体件作涡旋运动的装置。
23、按权利要求11所述的装置,其中所述锥体件在其下游端具有一个子弹头突出物,以及在所述子弹头突出物上的装置,用以支撑在所述分配器腔室中的所述锥体件。
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-
1986
- 1986-08-20 US US06/898,475 patent/US4861165A/en not_active Expired - Fee Related
-
1987
- 1987-07-29 CA CA 543311 patent/CA1284799C/en not_active Expired - Fee Related
- 1987-08-04 BR BR8703970A patent/BR8703970A/pt not_active IP Right Cessation
- 1987-08-10 PH PH35644A patent/PH24344A/en unknown
- 1987-08-11 DE DE8787630145T patent/DE3766319D1/de not_active Expired - Lifetime
- 1987-08-11 EP EP19870630145 patent/EP0256965B1/en not_active Expired - Lifetime
- 1987-08-17 MX MX775787A patent/MX168465B/es unknown
- 1987-08-18 IN IN651/CAL/87A patent/IN167565B/en unknown
- 1987-08-20 CN CN87105652A patent/CN1009212B/zh not_active Expired
- 1987-08-20 KR KR1019870009109A patent/KR920007009B1/ko not_active IP Right Cessation
- 1987-08-20 PL PL1987267403A patent/PL157233B1/pl unknown
- 1987-08-20 JP JP20910187A patent/JP2601283B2/ja not_active Expired - Lifetime
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PL157233B1 (en) | 1992-05-29 |
JPS6354924A (ja) | 1988-03-09 |
MX168465B (es) | 1993-05-26 |
KR880002568A (ko) | 1988-05-09 |
CN87105652A (zh) | 1988-03-02 |
US4861165A (en) | 1989-08-29 |
CA1284799C (en) | 1991-06-11 |
KR920007009B1 (ko) | 1992-08-24 |
EP0256965B1 (en) | 1990-11-22 |
JP2601283B2 (ja) | 1997-04-16 |
IN167565B (zh) | 1990-11-17 |
PH24344A (en) | 1990-06-13 |
PL267403A1 (en) | 1988-07-21 |
BR8703970A (pt) | 1988-04-05 |
EP0256965A2 (en) | 1988-02-24 |
DE3766319D1 (de) | 1991-01-03 |
EP0256965A3 (en) | 1989-02-08 |
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