正壓輸送和負壓輸送是兩種不同的物料輸送方式，它們在 輸送原理、應用范圍、系統特點以及適用物料等方面存在明顯的區別 。

　　Positive pressure conveying and negative pressure conveying are two different methods of material conveying, which have significant differences in conveying principles, application scope, system characteristics, and applicable materials.

　　輸送原理 ：

　　Transport principle:

　　正壓輸送 ：利用輸送系統前端的風機向輸送管道內通入壓縮空氣，利用管道起點與終點的壓力差，使空氣在管道內流動并帶動物料運動。物料在輸送終點與空氣分離。

　　Positive pressure conveying: Use the fan at the front end of the conveying system to introduce compressed air into the conveying pipeline, and use the pressure difference between the starting and ending points of the pipeline to make the air flow inside the pipeline and move the animal material. The material separates from the air at the end of transportation.

　　負壓輸送 ：通過輸送系統末端的引風裝置運轉時形成負壓，利用外界大氣壓力與系統內的負壓差作為動力，將物料吸入管道并隨氣流到達終點，最后通過過濾分離。

　　Negative pressure conveying: When the induced draft device at the end of the conveying system operates, negative pressure is formed, and the external atmospheric pressure and the negative pressure difference inside the system are used as power to suck the material into the pipeline and reach the end point with the airflow. Finally, it is separated by filtration.

　　應用范圍 ：

　　Application scope:

　　正壓輸送 ：適用于分散輸送，即一點向多點輸送，適用于粉狀物、顆粒狀物料或液體的輸送，輸送距離較長，且具有漏氣檢查和處理方便的特點。

　　Positive pressure conveying: suitable for dispersed conveying, that is, conveying from one point to multiple points, suitable for conveying powder, granular materials or liquids, with a long conveying distance and convenient air leakage inspection and handling.

　　負壓輸送 ：多用于集中式輸送，即多點向一點輸送，適用于易吸潮、易揚塵及易氧化變質的物料，特別適用于有毒有害、有刺激氣味的物料輸送。由于負壓抽吸，無物料泄漏風險，且輸送距離較短。

　　Negative pressure conveying: commonly used for centralized conveying, that is, multi-point to one point conveying, suitable for materials that are prone to moisture absorption, dust lifting, and oxidation deterioration, especially suitable for conveying toxic, harmful, and pungent materials. Due to negative pressure suction, there is no risk of material leakage and the conveying distance is relatively short.

　　系統特點 ：

　　System features:

　　正壓輸送 ：系統內部為正壓狀態，物料易從排料口卸出，輸送過程中壓力較高，適用于長距離輸送，且對風機的磨損相對較輕。

　　Positive pressure conveying: The system is in a positive pressure state internally, and materials are easily discharged from the discharge port. During the conveying process, the pressure is high, making it suitable for long-distance conveying, and the wear on the fan is relatively light.

　　負壓輸送 ：系統內部為真空狀態，密封性能較好，適用于短距離輸送，且能夠有效避免物料泄漏到大氣中，適用于有毒有害物料的輸送。

　　Negative pressure conveying: The system is in a vacuum state with good sealing performance, suitable for short distance conveying, and can effectively prevent material leakage into the atmosphere. It is suitable for conveying toxic and harmful materials.

　　適用物料 ：

　　Applicable materials:

　　正壓輸送 ：適合輸送干燥、易流動及密度較大的散裝物料，如糧食、化工原料等。

　　Positive pressure conveying: suitable for conveying dry, flowable, and high-density bulk materials, such as grains, chemical raw materials, etc.

　　負壓輸送 ：適合輸送易吸潮、易揚塵及易氧化變質的物料，如粉狀物料、工業粉塵等，特別適用于對環保要求較高的場合。

　　Negative pressure conveying: suitable for conveying materials that are prone to moisture absorption, dust lifting, and oxidation deterioration, such as powdered materials, industrial dust, etc., especially suitable for occasions with high environmental requirements.

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