气力输送怎么输送固体颗粒？固体颗粒在输送管道中的运动涉及空气速度的分布和固体和管壁之间的摩擦。输送管内固体颗粒的运动状态为滚动和悬浮。同时还发生固粒与固粒、固粒与壁面的碰撞，当固体颗粒的旋转也产生力时，完全考虑这些问题是相当复杂的。

　　How to transport solid particles by pneumatic conveying? The movement of solid particles in a conveying pipeline involves the distribution of air velocity and friction between the solid and the pipe wall. The motion state of solid particles inside the conveying pipe is rolling and suspended. At the same time, collisions between solid particles and solid particles, as well as between solid particles and walls, occur. When the rotation of solid particles also generates forces, fully considering these issues is quite complex.

　　长期以来在这方面进行了大量的研究。但仍有许多问题没有得到很好，例如在散装物料在管道中被气流带走的过程中，固体相互碰撞并与管壁碰撞。碰撞导致固体颗粒破碎和管道磨损。这种情况在高速时显得愈加明显。

　　Extensive research has been conducted in this area for a long time. But there are still many problems that have not been well solved, such as solid collisions and collisions with the pipe wall during the process of bulk materials being carried away by airflow in the pipeline. Collisions cause solid particle breakage and pipeline wear. This situation becomes increasingly apparent at high speeds.

　　气力输送系统的设计不合理或系统偏离正常操作条件，则在输送过程中可能出现堵塞现象。突发的堵塞，将影响比常生产；

　　If the design of the pneumatic conveying system is unreasonable or the system deviates from normal operating conditions, blockage may occur during the conveying process. Sudden blockages will affect normal production;

　　严重时将导致系统停止运行，它影响正常生产和设备造成的经济损失。目前国内外对管道堵塞的机理和堵塞的防治还没有深入的研究。

　　In severe cases, it will cause the system to stop running, affecting normal production and equipment safety, resulting in economic losses. At present, there is no in-depth research on the mechanism and prevention of pipeline blockage both domestically and internationally.

　　现行的系统设计，一是采用经验试凑的办法，代价是提高运行成本；二是不能采取积极的控制措施。当堵塞发生后，为了堵塞采用暂停正常生产，冲气消堵，还有一种去除气体和中途堵塞的方法。但是操作的复杂性也提高了成本。

　　The current system design adopts a trial and error approach, which comes at the cost of increasing operating costs; Secondly, proactive control measures cannot be taken. After blockage occurs, in order to eliminate it, normal production is suspended, gas flushing is used to eliminate blockage, and there is also a method of removing gas and midway blockage. However, the complexity of the operation also increases the cost.

　　气力输送吸送特点

　　Characteristics of pneumatic conveying and suction

　　1:适用于从多处向一处集中输送。进料点可以是一个或多个，材料管可以装载一个或多个分支管。多个进给点的材料不仅可以依次输送到卸载点，而且可以将多个进给点的材料同时输送到卸载点。

　　1: Suitable for centralized transportation from multiple locations to one location. The feeding point can be one or more, and the material pipe can be loaded with one or more branch pipes. Materials from multiple feed points can not only be sequentially transported to the unloading point, but also simultaneously transported to the unloading point.

　　2:在负压作用下，这种材料很容易被吸入，料斗可打开，可连续进给和输送。

　　2: Under negative pressure, this material is easily sucked in, and the hopper can be opened for continuous feeding and conveying.

　　3:物料在负压下输送，水容易被蒸发，所以含水量高的材料比压力进料更容易输送，通过加热提供的材料可以通过运输来冷却。

　　3: Materials are transported under negative pressure, and water is easily evaporated. Therefore, materials with high water content are easier to transport than those fed under pressure. The materials provided by heating can be cooled through transportation.

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