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当前位置:越南老街最大赌场 » 华力泵业资讯中心 » 常见问题 » 在许多工业过程中,物质以水状或“泥浆”形式出现

在许多工业过程中,物质以水状或“泥浆”形式出现

文章出处:责任编辑:人气:-发表时间:2017-09-08 09:30【

WUNICHULI

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厢式压滤机


厢式压滤机中包括多个塑料滤框,它们会在高压作用下挤压在一起。在这些滤框内部是中空的滤室,压滤机因此而得名,滤室周围是滤布。当施加压力使污泥进入滤室时,即可在滤室内形成“滤饼”,滤液通过滤布流入排水通道。当所有的滤室完全充满时,污泥进料停止。现在可以打开压滤机并取出固体滤饼。关闭压滤机后,即可准备进行新的压滤过程。

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容积泵


为了形成压力,经常使用各种形式的容积泵,其中包括活塞隔膜泵,它们常用于大型压滤机。在这些大型昂贵的装置中,由液压驱动一个或两个隔膜,并通过阀门将污泥送入压滤机。即使用到的是一些小型设备,这些泵也会产生高昂的间接费用,例如用于平衡进料速率的空气压力容器、大压力监测器或支管。还使用偏心螺杆泵,它们即可用作自调节泵(带有通过变频器进行电子控制的电动机),也可用作循环系统(当空气压力容器被泵充满气体时)。

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AODD泵


相比之下,气动双隔膜(AODD)泵更易于使用; 它们耐干运行,几乎无需维护、自吸、自调节,结构极为紧凑。

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增大压力


标准的气动隔膜泵通常受到供气压力的限制,这样的气压往往不足以填充压滤机。 因此,通常需要增大压力。要达到这一目的,有三种非常不同的技术解决方案:


•种技术:使用标准泵上的一个隔膜产生额外的压力。这层隔膜仅被空气和压缩空气包围,它受到的力通过内部的隔膜连接,被传送至进料隔膜,使进料隔膜能够在两倍压力的工况下工作。

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•另一项技术,使用带有气压放大器的标准泵来操作。该气压放大器利用增压的空气压力来驱动泵。然而,大多数情况下使用的都是标准泵,限制了该方法的应用。虽然这些泵配有外部增强件,但从技术角度来看,这里所讨论的标准泵是针对极低的压力而设计和制造的,因此它们对于增大应力的承受能力有限。

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•第三种解决方案,是具有内部压力转换装置的泵。图2显示了该技术解决方案——如何使压缩空气随着隔膜一起施加在差压活塞上。

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图3.基于砂浆过程的磨损因子。
聚乙烯 = 1(上); 聚丙烯 = 7(中); 钢= 1.6(下)

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新一代泵


随着新一代高压气动隔膜泵的推出,现在又出现了一种技术解决方案,它在压力转换泵极为坚固的外壳上,结合设计了一个不发生空气转换的部分。 因此,这种形式的泵适用于重载工况下的所有应用,涵盖了从低进给压力到高达15 bar(218 psig)的高压应用。

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