Positive pressure pneumatic conveying refers to the conveying mode that the positive pressure air source is used to blow in the pipeline at high speed. Generally, the air sources used are centrifugal fan, Roots blower, air compressor, etc. Positive pressure pneumatic conveying is a dynamic 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, with longer distance and larger capacity than negative pressure system. The positive pressure pneumatic conveying system uses a blower to connect with a single or multiple downstream material entry points. Each product enters the conveying line through a rotary airlock valve to maintain the pressure difference between the ambient atmosphere and the conveying line. The positive pressure pneumatic conveying material and air are blown out from the pipe outlet at the point of single or multiple use, separated by the filter receiver or cyclone separator, or directly into the process container and discharged to the downstream dedusting equipment. 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 a rotary airlock 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。

In order to simply transfer products from point a to point B, positive pressure pneumatic conveying is usually required. The equipment generally uses blowers, rotary airlocks, cyclone receivers (sometimes airlock valves) and piping systems with elbows and couplings. Normally, the air discharged from the cyclone collector needs to be discharged to a secondary filter, scrubber or simple atmosphere.

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，将物料串联到二个目的地，这需要进行特殊的设计。

A feature of the positive pressure pneumatic conveying system is that the unloading point can be added. Only after the destination is determined, add a diverter valve on the conveying pipeline to unload to the designated destination. Another feature of positive pressure pneumatic conveying is that it can be designed as a circulating system through planning, which can reuse air and connect materials to two destinations in series. This requires special design.

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非常常见的，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。

Although it is very common for a positive pressure pneumatic conveying system to convey materials to the receiving point under atmospheric pressure in all pneumatic conveying systems, there will be some problems in conveying materials to pipes with air under high pressure. There are many kinds of feeding devices available. Unfavorable pressure gradient, each type of feeder may leak air and carry dust from the positive pressure pneumatic conveying system.

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，一定要注意空气泄漏的可能性。

With diverter valves, a positive pressure system can easily transport multiple materials to multiple receiving points. Although it can also be arranged to transport materials to a common pipe at multiple points, when not in use, due to high-pressure air in the pipe, the possibility of air leakage must be noted.

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