完整的除尘系统包括吸尘罩、通风管道、除尘器、风机四个部分。通风管道(简称管道)是运送含尘气流的通道，它将吸尘罩、除尘器及风机等部分连接成一体。管道设计是否合理，直接影响到整个除尘系统的效果。因此，需要考虑管道设计中的各种问题，以获得比较合理、有效的方案。
A complete dust removal system includes four parts: vacuum hood, ventilation duct, dust collector, and fan. Ventilation ducts (referred to as ducts) are channels for transporting dust containing airflow, connecting parts such as vacuum hoods, dust collectors, and fans into one. The rationality of pipeline design directly affects the effectiveness of the entire dust removal system. Therefore, it is necessary to consider various issues in pipeline design in order to obtain a more reasonable and effective solution.
1、管道构件
1. Pipeline components
弯头：弯头是连接管道的常见构件，其阻力大小与弯管直径d、曲率半径R以及弯管所分的节数等因素有关。曲率半径R越大，阻力越小。但当R大于2～2.５d时，弯管阻力不再显著降低，而占用的空间则过大,使系统管道、部件及设备不易布置，故从实用出发，在设计中R一般取1～2d，90°弯头一般分成4～6节。
Elbows: Elbows are common components used to connect pipelines, and their resistance is related to factors such as the diameter d of the bend, the curvature radius R, and the number of sections divided by the bend. The larger the curvature radius R, the smaller the resistance. But when R is greater than 2-2.5d, the resistance of the bend no longer significantly decreases, and the occupied space is too large, making it difficult to arrange the system pipes, components, and equipment. Therefore, from a practical perspective, R is generally taken as 1-2d in design, and 90 ° bends are generally divided into 4-6 sections.
三通：在集中风网的除尘系统中，常采用气流汇合部件——三通。合流三通中两支管气流速度不同时，会发生引射作用，同时伴随有能量交换，即流速大的失去能量，流速小的得到能量，但总的能量是损失的。为了减小三通的阻力，应避免出现引射现象。
Tee: In the dust removal system of a centralized air network, the airflow convergence component - the tee is often used. In a confluence tee, if the airflow velocity of the two branch pipes is different, there will be an ejection effect, accompanied by energy exchange, that is, energy is lost when the flow rate is high, and energy is obtained when the flow rate is low, but the total energy is lost. In order to reduce the resistance of the tee, the phenomenon of ejection should be avoided.
三通的阻力与气流方向有关，两支管间的夹角一般取15°～30°，以保证气流畅通，减少阻力损失。三通不能采用T形连接，因为T形连接的三通阻力纤维 驱鸟设备 保定通风管道 塑料土工格栅 检查井模具 流水槽模具 锻造厂家 华尔街铜牛比合理的连接方式大4～5倍。
The resistance of the tee is related to the direction of the airflow, and the angle between the two branches is generally taken as 15 ° to 30 ° to ensure smooth airflow and reduce resistance loss. Tees cannot be connected in a T-shape because their resistance is 4-5 times greater than a reasonable connection method.