如何选择气力输送对于企业来说非常重要，今天我将气力输送缩小的一个非常小的阶段来让大家更熟悉气力输送系统的选择。

　　How to choose pneumatic conveying is very important for enterprises. Today, I will narrow down pneumatic conveying into a very small stage to make everyone more familiar with the selection of pneumatic conveying systems.

　　1.考虑气力输送材料因素

　　1. Consider the factors of pneumatic conveying materials

　　粒径和形状对输送阶段具有巨大影响，因为它决定了流动性以及移动材料需要多少空气。 这指的是每个粒子的形状。

　　The particle size and shape have a significant impact on the conveying stage, as they determine the fluidity and how much air is required to move the material. This refers to the shape of each particle.

　　散装密度是其散装形式的材料，有助于确定气动系统的设计以及将散装从一个地方移动到另一个地方所需的内容。

　　Bulk density is the material in its bulk form, which helps determine the design of pneumatic systems and the content required to move bulk from one place to another.

　　水分含量会影响流动性，是设计气动系统时的重要考虑因素。水分会导致材料粘结管道堵塞。

　　Moisture content can affect fluidity and is an important consideration when designing pneumatic systems. Moisture can cause blockages in material bonding pipelines.

　　易碎性是指材料粉碎的容易程度。 许多材料在与管道表面接触或者弯头碰撞时破裂。如果您担心这一点，应使用较低的速度来减少颗粒破碎变形粘结性意味着材料在压力下会相互粘附，从而在输送管道内产生问题。

　　Fragility refers to the ease with which a material can be crushed. Many materials break when they come into contact with the surface of pipelines or collide with bends. If you are concerned about this, you should use lower speeds to reduce particle breakage, deformation, and adhesion, which means that materials will adhere to each other under pressure, causing problems in the conveying pipeline.

　　吸湿性是材料容易吸收空气中水分的能力。 这些材料可以涂覆在输送线的壁上并导致堵塞。 使用干燥空气可有助于减少管线中的水分。

　　Moisture absorption is the ability of a material to easily absorb moisture from the air. These materials can be coated on the walls of the conveyor line and cause blockages. Using dry air can help reduce moisture in pipelines.

　　2.三种常见的气力输送要考虑输送的三个基本类别。 了解这个阶段将有助于确定如何选择气力输送系统

　　2. Three common types of pneumatic conveying should consider the three basic categories of conveying. Understanding this stage will help determine how to choose a pneumatic conveying system

　　密相气力输送：密相气力输送采用的系统为低速输送系统。 材料不会悬浮在空气流中，这样一来材料和气力输送系统本身的磨损并不多。 如果是易碎材料需要选择这种类型的系统，因为它的低速度可以减少对颗粒的损害。 甚至略微吸湿的材料也不需要使用空气干燥设备。

　　Dense phase pneumatic conveying: The system used for dense phase pneumatic conveying is a low-speed conveying system. The material will not be suspended in the airflow, so there is not much wear on the material and the pneumatic conveying system itself. If it is a fragile material, this type of system needs to be selected because its low speed can reduce damage to particles. Even slightly hygroscopic materials do not require the use of air drying equipment.

　　半密相气力输送：当只有一部分材料悬浮在空气流中进行输送的情况时，我们一般称为半密相气力输送系统。 半密相气力输送系统适用于处于可通风状态的产品，如水泥或粉煤灰。 半密相气力输送系不适于较大的颗粒，较长的输送距离或具有高湿度的材料使用，因为它们容易在管道内堵塞。

　　Semi dense phase pneumatic conveying: When only a portion of the material is suspended in the air flow for conveying, we generally refer to it as a semi dense phase pneumatic conveying system. The semi dense phase pneumatic conveying system is suitable for products that are in a ventilated state, such as cement or fly ash. Semidense phase pneumatic conveying systems are not suitable for larger particles, longer conveying distances, or materials with high humidity, as they are prone to clogging in pipelines.

　　稀相气力输送：稀相气力输送是一种高速系统，特点是材料不断悬浮在气流中。 材料基本不会在任何位置积聚在输送管道的底部。 最好用于密度较小的非磨蚀性，非易碎材料，例如面粉或玉米淀粉。 较大的材料需要更高的气流以保持颗粒悬浮，并且因为稀相气力输送速度过快与管道壁和弯头的摩擦，材料基本不可能保持较高完整度。但是如果您不关心物料的完整度可以忽略。

　　Dilute phase pneumatic conveying: Dilute phase pneumatic conveying is a high-speed system characterized by the continuous suspension of materials in the airflow. The material will not accumulate at the bottom of the conveying pipeline in any position. It is best used for non abrasive, non fragile materials with low density, such as flour or corn starch. Larger materials require higher airflow to maintain particle suspension, and due to the fast speed of dilute phase pneumatic conveying and friction with pipeline walls and bends, it is almost impossible for the material to maintain high integrity. But if you don't care about the integrity of the materials, you can ignore it.

　　最后需要注意的是：

　　Finally, it should be noted that:

　　在决定气动输送系统时，还要记住其他几个问题。 将输送线和系统设备接地可以减少静电。 此外，有毒材料应与真空系统一起使用，以防止泄漏泄到环境中。 最后，一些材料在暴露于空气时可形成爆炸性混合物，需要在输送系统中使用替代气体。

　　When deciding on a pneumatic conveying system, there are several other issues to keep in mind. Grounding the conveyor line and system equipment can reduce static electricity. In addition, toxic materials should be used in conjunction with vacuum systems to prevent leakage into the environment. Finally, some materials can form explosive mixtures when exposed to air, requiring the use of alternative gases in the delivery system.

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