根据物料特性选择气力输送系统类型，核心是匹配物料的物理化学属性与不同系统（负压、正压、混合）的输送优势，避免堵管、磨损、污染等问题。

　　Selecting the type of pneumatic conveying system based on the characteristics of the material, the core is to match the physical and chemical properties of the material with the conveying advantages of different systems (negative pressure, positive pressure, mixing), and avoid problems such as pipe blockage, wear, and pollution.

　　1. 按物料物理特性选择

　　1. Select based on the physical properties of the material

　　粒度与密度：

　　Particle size and density:

　　细粉（如面粉、滑石粉，粒度＜100μm）、轻质物料：优先选负压输送系统。负压环境不易导致粉体团聚，且能从多个点同时吸料，适合分散产尘点的收集输送。

　　Fine powders (such as flour and talcum powder, particle size<100 μ m) and lightweight materials: Priority should be given to negative pressure conveying systems. Negative pressure environment is less likely to cause powder agglomeration and can simultaneously absorb materials from multiple points, making it suitable for collecting and transporting dispersed dust producing points.

　　粗颗粒（如石英砂、小颗粒矿石，粒度＞1mm）、重质物料：优先选正压输送系统（如浓相正压）。正压能提供更强的推力，避免颗粒因自重沉积堵管，且输送距离更远（可达数百米）。

　　Coarse particles (such as quartz sand, small particle ores, particle size>1mm) and heavy materials: priority should be given to positive pressure conveying systems (such as concentrated phase positive pressure). Positive pressure can provide stronger thrust, avoid particle blockage due to self weight deposition, and transport over longer distances (up to several hundred meters).

　　磨琢性：

　　Grinding property:

　　高磨琢性物料（如刚玉粉、铁矿石粉）：选浓相正压输送系统。其输送速度低（通常＜5m/s），物料与管道摩擦小，可减少管道磨损；同时避免用负压系统（负压下高速气流会加剧磨损）。

　　High abrasive materials (such as corundum powder and iron ore powder): selected dense phase positive pressure conveying system. Its conveying speed is low (usually<5m/s), and the friction between the material and the pipeline is small, which can reduce pipeline wear; At the same time, avoid using negative pressure systems (high-speed airflow under negative pressure can exacerbate wear).

　　流动性与粘性：

　　Liquidity and viscosity:

　　易结块、高粘性物料（如糖粉、湿煤粉）：选正压稀相输送系统（需配流化装置）。正压气流能吹动物料，流化装置可防止结块，而负压系统易因物料粘壁导致吸料口堵塞。

　　Materials that are prone to clumping and have high viscosity (such as sugar powder and wet coal powder): choose a positive pressure dilute phase conveying system (requiring a fluidized bed device). Positive pressure airflow can blow animal materials, fluidization devices can prevent clumping, while negative pressure systems are prone to blockage of the suction port due to material sticking to the wall.

　　2. 按物料化学特性选择

　　2. Select according to the chemical properties of the material

　　易燃易爆物料（如煤粉、铝粉）：

　　Flammable and explosive materials (such as coal powder and aluminum powder):

　　优先选负压输送系统，若需长距离输送则选防爆型正压输送系统。负压系统即使泄漏，也不会向外释放可燃粉尘，降低爆炸风险；正压系统需全密闭+防爆电机、管道，避免粉尘与空气混合达到爆炸极限。

　　Prioritize the negative pressure conveying system, and if long-distance conveying is required, choose the explosion-proof positive pressure conveying system. Even if the negative pressure system leaks, it will not release combustible dust outward, reducing the risk of explosion; The positive pressure system needs to be fully enclosed with explosion-proof motors and pipelines to prevent dust from mixing with air and reaching explosive limits.

　　易吸潮、怕污染物料（如医药粉体、食品原料）：

　　Easy to absorb moisture and afraid of contamination materials (such as pharmaceutical powders and food raw materials):

　　选全密闭正压输送系统（如稀相正压）。正压系统可充惰性气体（如氮气）隔绝空气与水分，且管道无死角，避免物料残留污染，而负压系统可能吸入外界空气与潮气。

　　Choose a fully enclosed positive pressure conveying system (such as dilute phase positive pressure). The positive pressure system can be filled with inert gas (such as nitrogen) to isolate air and moisture, and the pipeline has no dead corners to avoid material residue pollution, while the negative pressure system may inhale external air and moisture.

　　腐蚀性物料（如盐粉、酸碱粉体）：

　　Corrosive materials (such as salt powder, acid alkali powder):

　　无论选负压还是正压系统，核心是匹配耐腐蚀材质管道与设备（如不锈钢316L），系统类型需结合输送距离（短距用负压，长距用正压）。

　　Whether choosing a negative pressure or positive pressure system, the core is to match corrosion-resistant material pipelines and equipment (such as stainless steel 316L), and the system type needs to be combined with the conveying distance (negative pressure for short distances, positive pressure for long distances).

　　本文由 气力输送系统  友情奉献.更多有关的知识请点击  http://www.sdyshjx.com/  真诚的态度.为您提供为全面的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　This article is a friendly contribution from the pneumatic conveying system For more related knowledge, please click http://www.sdyshjx.com/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.