正压气力输送：主要利用空压机或罗茨风机作为气源，按物料浓度分为密相输送和稀相输送

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负压气力输送：利用真空泵进行真空吸附

Negative pressure pneumatic conveying: using vacuum pump for vacuum adsorption

气力输送设备厂家输送系统的优点：

The advantages of pneumatic conveying equipment manufacturer's conveying system are as follows:

1)输送效率高；

1) High conveying efficiency;

2）物料在整个输送过程中完全封闭，因而很大的改善了工作条件，而且可避免物料在整个输送过程中吸湿、被污损或混入其他杂质，从而保证了被输送物料的质量，使物料输送过程免受外界环境干扰；

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3）设备简单，结构紧凑，工艺布置灵活，占地面积较小，选择布置输送线路容易；

3) The equipment is simple, the structure is compact, the process layout is flexible, the floor area is small, and it is easy to choose the layout of the transmission line;

4）整个系统易于实现自动化控制；

4) The whole system is easy to realize automatic control;

5）综合成本低，经济效益好；

5) The comprehensive cost is low and the economic benefit is good;

6）可很大的减少工人劳动强度。

6) Can greatly reduce the labor intensity of workers.

粉料气力输送系统的缺点：

Disadvantages of powder pneumatic conveying system:

1）与其他散状固体物料输送设备相比气力输送系统的动力消耗费较高(系指机械输送系统输送每吨物料所需的垃高功率)；

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2)气力输送系统仅能输送较干燥、粒度小、粘度小的物料。一般，如果产品不允许破碎，则易于碎裂的产品不适合采用气力输送。除非是特殊设计的设备，否则易吸湿及易结块的物料也不适宜用气力输送系统输送。易氧化的物料不适宜用空气输送，但可采用惰性气体来代替空气进行输送；

material Generally, if the products are not allowed to be broken, the products that are easy to be broken are not suitable for pneumatic conveying. material It is not suitable to transport easily oxidized materials with air, but inert gas can be used instead of air;

3)管道、通风机及其他元件与物料接触容易磨蚀、损坏；

3) Pipes, fans and other components are easy to be worn and damaged when contacting with materials;

4)输送距离受限制。至目前为止，气力输送系统只能输送较短的距离，一般水平距离小于米；

4) The conveying distance is limited. Up to now, pneumatic conveying system can only transport a short distance, generally the horizontal distance is less than meters;

5）物料特性的微小变化(如堆积密度，颗粒大小分布、硬度、休止角、磨琢性都能引起爆炸的潜在危险)都能引起操作上的困难。

5) Small changes in material properties (such as bulk density, particle size distribution, hardness, angle of repose and grindability can cause potential explosion hazards) can cause operational difficulties.

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