正压气力输送是采用正压气源高速在管道中进行吹送的输送方式一般采用的气源有离心风机、罗茨风机、空气压缩机等。正压气力输送为动压输送方式，分为正压稀相输送和正压密相输送。正压稀相输送系统通常用于将散装物料从一个地点输送到一个或多个目的地，比负压系统输送的距离更长，容量更大。正压气力输送系统利用一个鼓风机与单一或多个下游物料入口点连接，每一个产品进入输送线通过一个旋转气锁阀，为了保持环境大气和输送线之间的压差。正压气力输送物料和空气在单次或多次使用点从管道出口吹出，通过过滤器接收器或旋风分离器进行分离，或直接进入工艺容器，排放到下游的除尘设备。正压气力输送系统提供比负压系统更高的效率，可以在更长的距离传输，可以直接吹入过程和存储容器，而不使用旋转气锁阀。

Positive pressure pneumatic conveying adopts positive pressure air source to blow in the pipeline at high speed. Generally, the air sources used include centrifugal fan, Roots fan, air compressor, etc. Positive pressure pneumatic conveying is a dynamic pressure conveying mode, which is divided into positive pressure dilute phase conveying and positive pressure dense phase conveying. Positive pressure dilute phase conveying system is usually used to transport bulk materials from one place to one or more destinations. It has longer distance and larger capacity than negative pressure system. The positive pressure pneumatic conveying system uses a blower to connect with one or more downstream material inlet points. Each product enters the conveying line through a rotary air lock valve to maintain the pressure difference between the ambient atmosphere and the conveying line. The material is directly discharged into the container through the cyclone or the cyclone outlet, or the air is directly discharged from the downstream of the process separator through the cyclone outlet. The positive pressure pneumatic conveying system provides higher efficiency than the negative pressure system, can be transmitted over a longer distance, and can be directly blown into the process and storage container without using the rotary air lock valve.

为了简单地将产品从a点传送到B点，通常需要正压气力输送，设备一般用鼓风机、旋转气锁、旋风接收器(有时是气锁阀)和带有弯头和联轴器的管道系统。通常情况下，从旋风收集器排出的空气需要排到一个二级过滤器、洗涤器或简单的大气中。正压气力输送系统的一个特点是可以增加卸料点，只需确定好目的地后在输送管线上添加分流阀，卸货到指定的目的地。正压气力输送的另一个特点是，通过规划可以设计成一个循环的系统，重复使用空气，将物料串联到另一个目的地，这需要进行特殊的设计。尽管正压气力输送系统在大气压力下将物料输送到接收点是所有气力输送系统中比较常见的，但在高压下将物料输送到有空气的管道中会出现一些问题。可供使用的供料装置种类繁多。不利的压力梯度，每种类型的供料机都有可能从正压气力输送系统中泄漏空气，并携带灰尘。

In order to simply transfer products from point a to point B, positive pressure pneumatic conveying is usually required. The equipment generally uses blower, rotary air lock, cyclone receiver (sometimes air lock valve) and pipeline system with elbow and coupling. Usually, the air discharged from the cyclone collector needs to be discharged into a secondary filter, scrubber or simple atmosphere. One feature of the positive pressure pneumatic conveying system is that it can increase the unloading point. Just add a diverter valve on the conveying pipeline after determining the destination and unload to the designated destination. Another feature of positive pressure pneumatic conveying is that through planning, it can be designed into a circulating system to reuse air and connect materials in series to another destination, which requires special design. Although it is common for positive pressure pneumatic conveying systems to convey materials to the receiving point under atmospheric pressure, there will be some problems when conveying materials to pipes with air under high pressure. There are many kinds of feeding devices available. Due to adverse pressure gradient, each type of feeder may leak air from the positive pressure pneumatic conveying system and carry dust.

使用分流阀，正压系统可以很容易地将多个物料输送到多个接收点。虽然也可以安排将物料多点输送到一条普通的管道中，但在不使用时，由于管道中有高压空气，需要注意空气泄漏的可能性。

Using the diverter valve, the positive pressure system can easily transport multiple materials to multiple receiving points. Although it can also be arranged to transport materials to an ordinary pipeline at multiple points, when not in use, due to the high-pressure air in the pipeline, attention should be paid to the possibility of air leakage.

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