垂直立管、文丘里喉管、置换器(文丘里锥形管)和喷雾喷嘴同一中心排列在文丘里喉管上方的管道上。

文丘里净气机

High performance separators for fine dusts and aerosols, available in different scales.

排出的气体从上方或侧面流入管道。通常与侧面的离心分离机结合使用。文丘里净气机是适合分离精细粉尘和浮质的高性能分离机。

功能

文丘里净气机-02-v2

由于充满大量灰尘的气流与文丘里喉管中的洗涤液之间的相对速度较快,因此文丘里净气机的分离能力也较高。

为了加快气流速度,也为了加快洗涤液的速度,必须产生能源。这会导致气流出现压降,这里适合衡量分离能力的第一个压力表。如果进入洗涤区域前气流所含的水蒸汽饱和,或者更好的是,水蒸汽超级饱和,那么压力损失低,净气机也会达到良好的分离水平。当气体量波动时,气体与洗涤液之间的相对速度必须保持不变。

使用文丘里净气机,可以出色地实现这些目标。文丘里喉管和扩散器之间的差距可以使用可调整的锥形管进行改变,因此适合对应数量的气流。

在另一个合适的液滴分离机中,将分离携带微粒的液滴。一般来说,使用离心分离机或薄片液滴分离机。

为使分离效率达到最高,排出的气体在到达文丘里喉管之前,必须含有饱和的水蒸汽。就像在热气骤冷装置中一样,在文丘里净气机的气流入口区域适当地安放喷雾喷嘴,可以达到要求的饱和度。

主要特征

  • 净气机功能直接可用(无闲置时间)
  • 可分离浮质
  • 负载范围大,通过可控制型文丘里喉管可以更好地响应部分负载
  • 抗积垢,操作可靠性较高
  • 维护工作量低
  • 应用范围广,可以灵活合并和扩展
  • 可用所有常见材料交付

应用范围

  • 功率范围高达 200,000 立方米/小时的排出气体
  • 可分离颗粒或浮质
Mid-Scale Venturi Scrubbers

Venturi Scrubbers are particularly well-suited for separating aerosols and fine dust from gas flows. They are the right choice for particle sizes from approximately 0.7 µm upwards. 

The particles are separated by impaction on the washing media droplet in the venturi throat. The particle separation efficiency is influenced by the liquid spray density and the relative velocity between the particles and the gas/washing liquid mixture. The latter is achieved by forcing the mixture through a constriction within the equipment (= the Venturi throat).

To allow variable inlet flows we have developed a Venturi scrubber type equipped with a regulating cone in the Venturi throat. The control range lies between 20% and 100% load, with the same high separation rate.

The injection of the scrubbing medium is done by either a central liquid spray nozzle or by manifold nozzles arranged in the Venturi wall. The spray density can be improved by using e.g. steam driven dual fuel nozzles.

The Venturi scrubber cause pressure loss in the gas stream. At ambient pressure the typical range of pressure drop is 25 to 80 mbar. These values can differ depending on the overall pressure and the particle properties.
venturi-scrubber-2d-working-principle

Working principle of venturi scrubbers

Large Scale Venturi Scrubbers

The large scale Venturi Scrubbers are the best option when high separation capacities of large flow rates of dust laden gases are needed.

The scrubbing liquid is injected through several nozzles in the inlet cone preceding the venturi throat. The scrubber may be mounted vertically, inclined or horizontally. 

For cooling, gas conditioning and pre-dedusting, the scrubber is operated with a pressure drop of only a few mbar. The small pressure drop is obtained by approximately matching the velocity of the injected scrubbing liquid to that of the gas in the venturi throat. During deceleration in the diffusor, the relatively higher mass of the scrubbing liquid causes a further increase in the gas pressure. 

Depending on the volume of liquid injected, much energy may be transferred to the gas; this not only avoids a pressure drop in the scrubber but generates an increase in the gas pressure. In contrast, when operating this type of scrubber with a large pressure drop, the gas/dust mixture enters the scrubbing zone at a higher velocity that the scrubbing liquid. Hence, the liquid droplets are accelerated by the gas stream causing a pressure drop. As speed rises, increasing turbulence is simultaneously induced in the scrubber, bringing intensive mixing of the scrubbing liquid droplets and the raw gas, this being a prerequisite for high collection efficiencies. Therefore, the higher the gas velocity in the venturi throat, the larger the pressure drop.

The gas/droplet mixture is divided in a centrifugal separator which is arranged downstream.
Venturi scrubber, large scale

Large scale venturi scrubber

Downloads

GEA 洞察

定制挤奶设备支持奶牛和农场主的福祉

健康快乐的奶牛是成功和可持续牛奶生产的关键。因此,保持奶牛健康是每个奶农努力的核心。奶牛的健康受到许多因素影响,例如根据奶牛个体需求进行适当喂养、良好的饲养条件以及新鲜的空气、水和光照。而且,挤奶方式对奶牛的健康状况也有很大的影响。GEA 因其“优质挤奶理念”而闻名,不断致力于进一步发展,并在动物健康和牛奶质量方面取得更好的成果。

利用 GEA 的整体工程解决方案实现净零排放

各行各业都在努力实现净零排放目标,同时遵守严格的脱碳法规和立法。与此同时,公司必须平衡日益增长的质量、产品开发和工艺优化需求,此外,还必须努力提高盈利能力。应对这一挑战需要采取 GEA 提供的协作和整体方法。

在餐桌上享用…新食品:打造我们食品的未来

咖啡、可可、牛奶、肉类、鱼类和蛋类 - 这些日常主食在很大程度上依赖集约农业。随着新食品技术的兴起,我们有了更多可持续的替代品。我们采访了 GEA 液体、发酵和灌装部门的高级副总裁 Reimar Gutte 博士,探讨其中的可能性和政策。

接收 GEA 新闻

订阅 GEA 的新闻,掌握 GEA 的创新信息和故事。

联系我们

我们随时为您提供帮助!您只需提供少量详细信息,我们就能回复您的查询。