Pneumatic conveying is an important part of cleaner production. It uses air (or other gas) flow as conveying power to transport 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 some 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 understand it!

一、侵蝕損耗

1、 Erosion loss

堅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，而磨損是通過粒子在表面滑動時的摩擦發(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，會導(dǎo)致空氣泄漏。當(dāng)空氣泄漏時，到達(dá)輸送管道的空氣就會減少，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)，物料會進(jìn)入風(fēng)機(jī)，使其壽命減少。

The hard gravel like material can quickly wear the components of the pneumatic conveying system, especially in the elbow feeding pipeline. Wear occurs through impact, especially at high speed, 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. When the wear is serious, it will lead to air leakage. 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 and reduce 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，可以分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。這不僅會降低材料的質(zhì)量，而且還會產(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)量將減少沖擊，并可減少物料受損。

A large amount of energy is generated in the process of pneumatic conveying, which can be divided into 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、 Condense

在氣力輸送系統(tǒng)中，許多物料在吸收水分后會結(jié)塊或粘在管道上。冷凝是常見的原因。在某些情況下，當(dāng)工廠運行時，溫度在白天明顯升高，在晚上下降。這些溫度變化會導(dǎo)致凝結(jié)，物質(zhì)會吸收，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問題。或者，由于這個問題通常發(fā)生在啟動過程中，在使用前向氣力輸送管道中吹一段短時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 running, the temperature increases significantly during the day and decreases at night. These temperature changes will lead to condensation, and substances will absorb, leading to condensation or adhesion. Slight heating or insulation of the pipe can help prevent this problem. Alternatively, since this problem usually occurs during startup, blowing air into the pneumatic conveying pipeline for a short time before use can dry the pipeline. If none of these solutions are applicable, an air drying system is required.

四、灰塵

4、 Dust

氣力輸送系統(tǒng)是完全封閉的，這有助于減少灰塵問題?；覊m對許多不同行業(yè)的工廠造成了一些比較大的危害。長期、頻繁地接觸任何類型的粉塵通常會帶來一些健康和隱患，從肺部問題、皮膚問題到火災(zāi)危險等等。從表面上看似無害的物質(zhì)，如面粉——它已經(jīng)多次引起危險.控制氣力輸送系統(tǒng)內(nèi)和周圍的粉塵是關(guān)重要的。氣力輸送系統(tǒng)的入口和出口存在特別的危險。氣力輸送系統(tǒng)經(jīng)常與容易產(chǎn)生粉塵的物料一起工作，粉塵會堆積在皮帶、斗式提升機(jī)、料斗和輸送機(jī)兩端的其他設(shè)備周圍。這些地點的集塵系統(tǒng)是必不可少的。

The pneumatic conveying system is completely closed, which helps to reduce dust problems. Dust has caused some great harm to factories in many different industries. Long term and frequent exposure to any type of dust usually brings some health and hidden dangers, from lung problems and skin problems to fire hazards. Seemingly harmless substances, such as flour, have repeatedly caused danger It is very important to control the dust in and around the pneumatic conveying system. The inlet and outlet of pneumatic conveying system are particularly dangerous. Pneumatic conveying systems often work with materials prone to dust, which will accumulate around belts, bucket elevators, hoppers and other equipment at both ends of the conveyor. Dust collection systems in these locations are essential.

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