The scheme of pneumatic conveying system is planned by engineers. Pneumatic conveying is a method of conveying materials with higher transportation efficiency, which is widely used in all walks of life. There are simple and complex schemes of pneumatic conveying system. When exploring the scheme of pneumatic conveying system, some factors need to be considered. Pneumatic conveying equipment and methods must match the conveyed materials. The following are some key points to consider when selecting the scheme of pneumatic conveying system.

一、材料特性；在選擇氣力輸送系統(tǒng)方案時，要考慮的是要處理的物料的類型。體積密度是要考慮的因素，因為它決定了真空接收器和空氣的來源。堆積密度決定了在輸送線中每分鐘需要多少空氣。除材料特性外，其他需要考慮的因素有:粒子大小/形狀、易碎性、水分含量、磨損性、毒性、爆炸特性等。了解物料的特性是關重要的，因為每個氣力輸送系統(tǒng)方案的設計是針對處理某些類型的物料。

1、 Material properties; When choosing the scheme of pneumatic conveying system, the first thing to consider is the type of materials to be processed. Bulk density is the first factor to be considered because it determines the source of vacuum receiver and air. The bulk density determines how much air is needed per minute in the conveyor line. In addition to material properties, other factors to be considered include particle size / shape, fragility, moisture content, abrasiveness, toxicity, explosion characteristics, etc. It is very important to understand the characteristics of materials, because each pneumatic conveying system scheme is designed to deal with certain types of materials.

二、系統(tǒng)規(guī)模；在做氣力輸送系統(tǒng)方案前，要了解氣力輸送系統(tǒng)是否能夠處理垂直或水平的距離，材料輸送，以及它是否運用適合的設施。氣力輸送系統(tǒng)方案規(guī)劃的規(guī)模一定是為維護和監(jiān)督留出空間，包括取貨點的數(shù)量，接收容器的大小，如果是連續(xù)的過程，進料速率，如果是批處理過程，批的到達頻率和批的大小都要考慮周全。

2、 System scale; Before making the pneumatic conveying system scheme, it is necessary to understand whether the pneumatic conveying system can handle the vertical or horizontal distance, material conveying, and whether it uses appropriate facilities. The scale of pneumatic conveying system scheme planning must be to leave space for maintenance and supervision, including the number of pick-up points, the size of receiving containers, if it is a continuous process, feed rate, if it is a batch process, the arrival frequency and size of batches should be considered comprehensively.

三、負壓和正壓；做氣力輸送系統(tǒng)方案時要考慮負壓氣力輸送系統(tǒng)通過管道吸料，對于壓力反應靈敏的物料是理想的。正壓氣力輸送系統(tǒng)推動物料通過管道。

3、 Negative pressure and positive pressure; When making the scheme of pneumatic conveying system, we should consider that the negative pressure pneumatic conveying system sucks materials through the pipeline, which is ideal for materials with sensitive pressure response. The positive pressure pneumatic conveying system pushes materials through the pipeline.

四、稀相和密相；稀相在壓力下使物料高速運動，并在運輸過程中發(fā)生破碎。密相用于易碎材料，因為它在低壓下工作。稀相的料氣比高，而密相的料氣比低。

4、 Dilute phase and dense phase; The dilute phase makes the material move at high speed under pressure and breaks during transportation. Dense phase is used for fragile materials because it works at low pressure. The material gas ratio of dilute phase is high, while that of dense phase is low.

五、成本；規(guī)劃簡單的氣力輸送系統(tǒng)方案，做出來的系統(tǒng)成本較低。大型的帶有復雜工藝的氣力輸送成本較高

5、 Cost; A simple pneumatic conveying system scheme is planned, and the system cost is low. The cost of large pneumatic conveying with complex process is high

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