負壓氣力輸送通常用于將材料從多個來源集中到一個點。進料裝置之間的壓力差很小或沒有，因此多點進料到共線幾乎沒有問題。因此，在負壓系統中，進料裝置可以比在正壓系統中便宜得多，簡單得多。負壓通常用于將材料從存儲容器、工藝設備、等多個來源輸送到單個或多個目的地。真空負壓氣力輸送系統是優秀的多個產品進口通過使用簡單的分流閥;因為每個目的地都必須有過濾接收器，所以多個目的地的成本較高。

Negative pressure pneumatic conveying is commonly used to concentrate materials from multiple sources to a single point. The pressure difference between the feeding devices is small or non-existent, so there is almost no problem with multi-point feeding to collinearity. Therefore, in a negative pressure system, the feeding device can be much cheaper and simpler than in a positive pressure system. Negative pressure is usually used to transport materials from multiple sources such as storage containers, process equipment, etc. to a single or multiple destinations. The vacuum negative pressure pneumatic conveying system is an excellent product imported through the use of simple diversion valves; Because each destination must have a filtering receiver, the cost of multiple destinations is higher.

　　負壓系統通常使用正排量抽風機，提供真空，通過管道將物料輸送到目的地，空氣和產品在帶有過濾器或旋風分離器的接收容器中分離。產品直接進入輸送線，如果需要計量，通過一個特殊的進料裝置，如旋轉閥或螺旋給料機。輸送的產品從接收容器通過旋轉氣閘連續排放，或通過閥門間歇排放到料斗、儲存容器或其他卸料點。

Negative pressure systems typically use positive displacement exhaust fans to provide vacuum, transport materials to their destination through pipelines, and separate air and products in receiving containers with filters or cyclone separators. The product enters the conveyor line directly, and if measurement is required, it is fed through a special feeding device, such as a rotary valve or a screw feeder. The transported products are continuously discharged from the receiving container through rotary air locks, or intermittently discharged to the hopper, storage container, or other discharge points through valves.

　　在真空輸送中，沒有運動部件與物料接觸，也沒有粉塵逸入大氣。由于這種優越的防漏性能，它們通常在清潔的基礎上進行指定，特別是在處理易燃或有毒材料時。負壓輸送系統的缺點是，如果負荷高或系統長度大，組件必須設計為高真空。這增加了組件的成本，在比較運輸方式時必須考慮到這一點。真空輸送系統特別適用于在中等距離上從多個點到單個目的地輸送低到中等容量的材料的系統。

In vacuum conveying, there is no contact between moving parts and materials, and no dust escapes into the atmosphere. Due to their superior leak proof performance, they are usually specified on a clean basis, especially when dealing with flammable or toxic materials. The disadvantage of a negative pressure conveying system is that if the load is high or the system length is large, the components must be designed for high vacuum. This increases the cost of components, which must be considered when comparing transportation methods. Vacuum conveying systems are particularly suitable for conveying materials of low to medium capacity from multiple points to a single destination over medium distances.

　　負壓氣力輸送系統的工作原理是將懸浮在空氣中的粒子從一個位置轉移到指定位置的過程。空氣懸浮顆粒以較低的壓力連續傳輸，鼓風機固定在系統的啟動處，以提供大量的空氣。這里鼓風機作為一個動力源連接到管道，旋轉閥將物料送入管道。一旦材料進入，鼓風機產生空氣將顆粒推到另一個目的地。

The working principle of negative pressure pneumatic conveying system is the process of transferring particles suspended in the air from one position to a specified position. Suspended air particles are continuously transported at lower pressure, and the blower is fixed at the starting point of the system to provide a large amount of air. Here, the blower serves as a power source connected to the pipeline, and the rotary valve sends the material into the pipeline. Once the material enters, the blower produces air to push the particles to another destination.

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