Pneumatic conveying is an important part of cleaner production. It uses air (or other gas) flow as the conveying power to carry powdery and granular solid materials in the pipeline The flow state of the material in the pipeline is very complex. According to the solid gas ratio of the material in the pipeline, it is a dense phase conveying system Pneumatic conveying system is widely used in the transportation of raw materials, powder and granular materials in petroleum, chemical industry, metallurgy, building materials, grain and oil, pharmaceutical and other factories Do you know the specific factors that affect the system performance? Next, follow Xiaobian to learn about it!

一、侵蝕損耗

1、 Erosion loss

堅(jiān)硬的砂礫狀物料可以迅速地磨損氣力輸送系統(tǒng)部件，特別是在彎頭供料的管道。磨損是通過撞擊發(fā)生的，特別是在高速時(shí)，而磨損是通過粒子在表面滑動(dòng)時(shí)的摩擦發(fā)生的。這在稀相氣力輸送和密相氣力輸送中都會(huì)發(fā)生的。旋轉(zhuǎn)閥的轉(zhuǎn)子頂端特別容易受到磨損，磨損嚴(yán)重時(shí)，會(huì)導(dǎo)致空氣泄漏。當(dāng)空氣泄漏時(shí)，到達(dá)輸送管道的空氣就會(huì)減少，從而造成氣力輸送系統(tǒng)堵塞。如果氣力輸送過濾系統(tǒng)不定期清洗和維護(hù)，物料會(huì)進(jìn)入風(fēng)機(jī)，使其壽命減少。

The hard gravel like materials can quickly wear the components of pneumatic conveying system, especially in the elbow feeding pipeline. Wear occurs through impact, especially at high speeds, and wear occurs through the friction of particles sliding on the surface. This happens in both dilute phase pneumatic conveying and dense phase pneumatic conveying. The top of the rotor of the rotary valve is particularly vulnerable to wear, which will lead to air leakage in case of serious wear. When the air leaks, the air reaching the conveying pipeline will be reduced, resulting in the blockage of the pneumatic conveying system. If the pneumatic conveying filtration system is not cleaned and maintained regularly, the materials will enter the fan, reducing its service life.

二、物料受損

2、 Material damage

氣力輸送過程中產(chǎn)生了大量的能量，可以分解超過必要或所需的物料。與管道等物料的碰撞和摩擦?xí)刮锪鲜軗p，尤其是當(dāng)物料易碎時(shí)。這不僅會(huì)降低材料的質(zhì)量，而且還會(huì)產(chǎn)生氣力輸送系統(tǒng)無法使用的細(xì)粉。由于稀相氣力輸送中物料速度較高，物料懸浮在空氣中，不經(jīng)過管道表面，故向密相輸送可解決部分物料降解問題。如果稀相輸送是可行的選擇，減少管道中彎角的數(shù)量將減少?zèng)_擊，并可減少物料受損。

A large amount of energy is generated in the process of pneumatic conveying, which can decompose more than necessary or required materials. Collision and friction with pipes and other materials will damage the materials, especially when the materials are fragile. This will not only reduce the quality of the material, but also produce fine powder that cannot be used by the pneumatic conveying system. Due to the high speed of materials in dilute phase pneumatic conveying, the materials are suspended in the air and do not pass through the pipe surface, so conveying to dense phase can solve the problem of degradation of some materials. If dilute phase transportation is a feasible option, reducing the number of bends in the pipeline will reduce impact and reduce material damage.

三、冷凝

3、 Condensation

在氣力輸送系統(tǒng)中，許多物料在吸收水分后會(huì)結(jié)塊或粘在管道上。冷凝是常見的原因。在某些情況下，當(dāng)工廠運(yùn)行時(shí)，溫度在白天明顯升高，在晚上下降。這些溫度變化會(huì)導(dǎo)致凝結(jié)，物質(zhì)會(huì)吸收，導(dǎo)致凝結(jié)或粘住。管道的微量加熱或絕緣部分可以幫助防止這個(gè)問題?；蛘?，由于這個(gè)問題通常發(fā)生在啟動(dòng)過程中，在使用前向氣力輸送管道中吹一段短時(shí)間的空氣可以使管道干燥。如果這些解決方案都不適用，那需要一個(gè)空氣干燥系統(tǒng)。

In pneumatic conveying system, many materials will agglomerate or stick to the pipeline after absorbing water. Condensation is a common cause. In some cases, when the plant is operating, the temperature increases significantly during the day and decreases at night. These temperature changes will cause condensation, and substances will absorb, causing condensation or adhesion. Trace heating or insulation of the pipe can help prevent this problem. Or, since this problem usually occurs during startup, blowing air into the pneumatic conveying pipe for a short time before use can dry the pipe. If these solutions are not applicable, an air drying system is required.

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