氣力輸送管道易發生磨損的原因是在管道輸灰過程中，由于輸送介質的顆粒有體積大小、硬度強弱之分，在輸送過程中在壓縮空氣的帶動下，與管道內壁發生碰撞摩擦，加之管道也會有彎管，在氣場作用下，物料進過彎管時所產生的碰撞更加激烈，因此，管道的內壁會受到磨損，若想減輕管道磨損現象，可通過以下方法。選擇輸送管道盡量選取高質量、加厚、耐磨的管道，在彎道處可采用內襯陶瓷的耐磨彎頭。在布置管道時，合理安排管道的排列，保證正常工作的前提下，盡量減少彎管的數量。輸灰管道中輸送粉煤灰時，灰質顆粒的大小和原煤的燃燒程度也有關系，煤中含有雜質少，燃燒更充分，產生的灰塵顆粒更細小，在通過管道時產生的摩擦力也會降低，可相應減少管壁的磨損度。

The reason why the pneumatic conveying pipeline is prone to wear is that during the ash conveying process, the particles of the conveying medium can be divided into size and hardness. In the conveying process, driven by compressed air, they collide and rub with the inner wall of the pipeline. In addition, the pipeline will also have bends. Under the action of the gas field, the collision caused by the materials entering the bends will be more intense. Therefore, the inner wall of the pipeline will be worn. If you want to reduce the wear of the pipeline, The following methods can be used. Select high-quality, thickened and wear-resistant pipes as far as possible, and wear-resistant elbows lined with ceramics can be used at bends. When arranging pipes, arrange the pipes reasonably to minimize the number of bends on the premise of ensuring normal operation. When conveying fly ash in the ash conveying pipeline, the size of gray matter particles is also related to the combustion degree of raw coal. The coal contains less impurities, burns more fully, produces finer dust particles, and the friction generated when passing through the pipeline will also be reduced, which can reduce the wear degree of pipe wall accordingly.

由于磨損是物料與壁面不斷摩擦或碰撞引起的，所以物料的粒度越大、硬度越高、速度越快、摩擦和碰撞的能量就越大，磨損就越嚴重。磨損的快慢大致與輸送氣流速度的冪次方成正比。另外，濃度越大，摩擦或碰撞次數越多，磨損亦越嚴重。減少磨損的方法，首先是要合理設計輸料管，盡量減少彎頭、水平段和傾斜段；要保持輸料管，不變形，連接處要對中，盡量減少管道內部的臺階和錯位。必要時可在容易磨損的部位加襯耐磨材料。

Because the wear is caused by the constant friction or collision between the material and the wall, the larger the particle size of the material, the higher the hardness, the faster the speed, the greater the energy of friction and collision, and the more serious the wear. The speed of wear is roughly proportional to the power of the conveying air velocity. In addition, the higher the concentration, the more times of friction or collision, and the more serious the wear. The first way to reduce wear is to reasonably design the conveying pipe and minimize the elbow, horizontal section and inclined section; The feeding pipe shall be kept free of deformation, and the connection shall be centered to minimize the steps and dislocation inside the pipe. If necessary, wear-resistant materials can be lined at the easily worn parts.

管道堵塞也是氣力輸灰系統中常見的故障之一，管道的堵塞會嚴重影響系統的正常運行，因此我們要注意檢查預防。氣力輸灰系統運行過程中，由于操作不當，會造成物料料的沉積，引起管道的堵塞，更容易發生阻塞的地方是管道的彎管（彎頭處）和較長的水平管段，檢查管道是否堵塞，可用鐵器敲擊管壁，聲音冷脆表示未阻塞，聲音沉悶表示已阻塞，若管道被阻塞，帶動風機的電動機電流便會急劇下降。發生管道阻塞現象時，要采取以下方法排除：用鐵器敲擊管道的底部和側部，使管道內沉積的物料振動并被氣流帶走。在彎管或水平管上開設透氣孔，正常運行的時候封閉，發生阻塞的時候阻塞處的透氣孔打開，讓外界的空氣進入，同時敲擊管壁，使沉積物被氣流帶走。

Pipeline blockage is also one of the common faults in pneumatic ash conveying system. Pipeline blockage will seriously affect the normal operation of the system, so we should pay attention to inspection and prevention. During the operation of the pneumatic ash conveying system, improper operation will lead to the deposition of materials and the blockage of the pipeline. The places where the blockage is more likely to occur are the elbow (elbow) of the pipeline and the long horizontal pipe section. Check whether the pipeline is blocked. Knock the pipe wall with an iron tool. The cold and crisp sound indicates that it is not blocked, and the dull sound indicates that it is blocked. If the pipeline is blocked, the motor current driving the fan will drop sharply. In case of pipeline blockage, the following methods shall be adopted: knock the bottom and side of the pipeline with an iron tool to make the materials deposited in the pipeline vibrate and be taken away by the air flow. Vent holes shall be set on the elbow or horizontal pipe, which shall be closed during normal operation. When blocking occurs, the vent holes at the blocking position shall be opened to allow outside air to enter. At the same time, the pipe wall shall be knocked to take away the sediment by the air flow.

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