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正壓氣力輸送系統的特點和注意事項

文章來源: 作者:羅茨機電 發布時間:2022-02-16 瀏覽次數:1035

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正壓氣力輸送是采用正壓氣源高速在管道中進行吹送的輸送方式一般采用的氣源有離心風機、羅茨風機、空氣壓縮機等。正壓氣力輸送為動壓輸送方式,分為正壓稀相輸送和正壓密相輸送。正壓稀相輸送系統通常用于將散裝物料從一個地點輸送到一個或多個目的地,比負壓系統輸送的距離更長,容量更大。正壓氣力輸送系統利用一個鼓風機與單一或多個下游物料入口點連接,每一個產品進入輸送線通過一個旋轉氣鎖閥,為了保持環境大氣和輸送線之間的壓差。正壓氣力輸送物料和空氣在單次或多次使用點從管道出口吹出,通過過濾器接收器或旋風分離器進行分離,或直接進入工藝容器,排放到下游的除塵設備。正壓氣力輸送系統提供比負壓系統更高的效率,可以在更長的距離傳輸,可以直接吹入過程和存儲容器,而不使用旋轉氣鎖閥。

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.

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為了簡單地將產品從a點傳送到B點,通常需要正壓氣力輸送,設備一般用鼓風機、旋轉氣鎖、旋風接收器(有時是氣鎖閥)和帶有彎頭和聯軸器的管道系統。通常情況下,從旋風收集器排出的空氣需要排到一個二級過濾器、洗滌器或簡單的大氣中。正壓氣力輸送系統的一個特點是可以增加卸料點,只需確定好目的地后在輸送管線上添加分流閥,卸貨到指定的目的地。正壓氣力輸送的另一個特點是,通過規劃可以設計成一個循環的系統,重復使用空氣,將物料串聯到另一個目的地,這需要進行特殊的設計。盡管正壓氣力輸送系統在大氣壓力下將物料輸送到接收點是所有氣力輸送系統中比較常見的,但在高壓下將物料輸送到有空氣的管道中會出現一些問題??晒┦褂玫墓┝涎b置種類繁多。不利的壓力梯度,每種類型的供料機都有可能從正壓氣力輸送系統中泄漏空氣,并攜帶灰塵。

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.

使用分流閥,正壓系統可以很容易地將多個物料輸送到多個接收點。雖然也可以安排將物料多點輸送到一條普通的管道中,但在不使用時,由于管道中有高壓空氣,需要注意空氣泄漏的可能性。

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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