式离心机

49000 .00- - - - - -93000 .00

卧螺离心机工艺特点

卧螺离心机的分离过程依赖于几个过程特性,如离心力或重力、沉降速率和分离因子、输送机和碗之间的差速以及排出液体的清晰度。

卧螺离心机需要一个离心力用于从液体中分离固体。这个特性取决于离心机的半径和它的角转速。卧螺离心机施加的力相当于几千克,这减少了颗粒的沉淀时间。这也有利于保持较大重力,这将导致更好的分离。

沉淀发生的速率是卧螺离心机的一个重要特性分离过程.的沉积速率受颗粒大小、颗粒形状、颗粒密度差以及颗粒与液体之间的粘度等因素的影响。使用絮凝剂可改善这一工艺特性。泥沙沉降速率也与分离因子有关离心机,这与离心力有关。

外碗和涡旋输送机以不同的高速旋转。这两者之间的速度差是整个卧螺离心机筒沉淀的原因。差速越大,滤饼沉降停留时间越短,因此必须将滤饼厚度控制在最小,以免影响出料质量。将蛋糕的厚度保持在最小也有助于蛋糕的改善脱水的过程。因此,有必要获得一个最佳的差速来平衡饼的厚度和质量。

上述特性影响液体输出的清晰度,这取决于整个体积速率,其中较高的流速将导致较差的液体透明度。另一个影响液体输出清晰度的特性是差动速度。低差动速度导致更好的清晰度,因此,有助于分离过程。重力在液体排出的清晰度方面也起作用。更高的重力会导致固体颗粒从液体中分离的增加,从而产生更好的清晰度。

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描述

它是如何工作的

进料产品通过入口泵入卧螺离心机。饲料进入一个水平的碗,它旋转。该碗由圆柱形部分和圆锥形部分组成。分离发生在碗的圆柱形部分。快速旋转产生离心力在这些力的作用下,密度较高的固体颗粒被收集并压实在碗壁上。一个卷轴(也螺旋或螺旋输送机)在碗内以稍微不同的速度旋转。这种速度差称为差动速度。这样,滚轴沿着碗的圆柱形部分运输沉降颗粒,并向上运输到碗的末端锥形部分。在碗的锥形部分的最小端,脱水的固体通过排放口离开碗。澄清的液体通过一个削盘(内部向心泵)离开。

用醒酒器进行三相分离

使用三相卧螺离心机,可以在一个过程步骤中分离出3个相。例如,由于密度不同而不能混合的两种液体(如油和水)从固体相中分离出来。重质液体(水)聚集在油和固体层之间的中间。这样彼此分离的两种液体就可以从醒酒器中抽出来。固体通过涡旋输送到放电开口,因为它也发生在2相分离。

三相分离的典型应用是生产食用油,如橄榄油、油泥处理、生产生物柴油等。

分离参数及影响因素

进料、吞吐量和停留时间

通过进料,可以将待处理的分离介质输入到涡旋进料室的中心,在那里进行加速。吞吐量会对产品性能产生影响停留时间

卧螺离心机加速

分离介质在醒酒器碗中达到最大速度,导致固体在碗的内径上沉降。碗的一个特点是它的圆柱形/圆锥形。

微分速度

在醒酒器碗和卷轴之间有一个差速,这是由工业醒酒器离心机上的齿轮单元产生的。差动速度决定了出料中的固体含量。

填充量/堰盘或溢流堰

澄清后的液体流到醒酒器离心机中碗的圆柱形末端,从那里通过碗盖上的开口流出。这些开口包含精确可调的堰盘/堰板,通过它们可以设置池的深度。堰盘决定了碗的填充量。

竞争过程的优势和局限性

一般来说,卧螺离心机利大于弊;然而,与其他流程相比,它有一些局限性。

卧螺离心机优点:
  • 卧螺离心机外观干净,几乎没有异味问题。
  • 与其他竞争流程相比,该设备不仅易于安装和快速启动和关闭,而且只需要较小的操作面积。
  • 该卧螺离心机是通用的不同长度的圆柱碗部分和锥角可以选择不同的应用。此外,该系统可以预编程各种设计曲线来预测污泥类型,而一些竞争过程,如带式压滤机,不能改变带式类型来操作不同的污泥类型。它的多功能性使机器具有各种功能,如操作增稠或脱水
  • 这台机器可以用变速杆转动吞吐量容量比机器小。这也减少了所需的单位数量。
  • 该装置主要变量少,反馈信息可靠,优化操作简单。
  • 与其他工艺相比,卧螺离心机降低了人工成本,因为它需要低的持续维护和操作人员的注意力。
  • 相比于一些竞争过程,如带式过滤机工艺上,卧螺离心机具有更大的工艺灵活性和更高水平的性能。
卧螺离心机限制:
  • 式离心机不能分离密度差异很小的生物固体,如细胞和病毒。一个有竞争力的过程,能够分离这些难以分离的固体是管碗离心机。
  • 这台机器可能会很吵,还会引起振动。
  • 由于该装置具有较高的高能量消耗除此之外
  • 卧螺离心机设备投资成本高。卷轴需要硬堆焊和耐磨保护材料,以减少磨损,从而减少卷轴磨损的维护。

额外的信息

重量 2400磅
97 × 34 × 54英寸
能力

1 - 5铜。Ft. 5-20 Cu。Ft., 10-30 Cu。Ft., 32-52 Cu。Ft. 50-80 Cu。英国《金融时报》。

电压

220伏,480伏

手册

PEUSALW300手册r3

规范

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