负压输送
Via pressure blowing or vacuum suction, pneumatic conveying systems can be divided as pressure system and vacuum system.
Vacuum system is more common for lower conveying capacity and shorter conveying distance as the pressure drop has a limitation normally up to 0.5bar, and almost no way to go to 1 bar.
Vacuum systems normally employ simple and cheaper pick up nozzles / wands instead of expensive rotary valve. However a rotary valve may be need in case of poor flowing product or higher conveying capacity.
通过压缩空气吹送还是负压抽吸,气力输送系统可以区分为正压输送和负压输送。
负压输送系统更适合于小能力、短距离输送场合,因为可获取的负压压头一般不超过-0.5barg,很难接近绝对真空。
负压输送一般取料只需采用简单廉价的负压吸咀而无须气锁。但在较高输送能力或物料不易流动的场合,取料点旋转阀仍有可能必须。
Compass provides modular vaccum receivers via vacuum pump (series Loader P) or venturi vacuum generator (series Load V, client to provide compressed air) and vacuum sequencing system, either in dilute phase conveying technology or dense phase conveying technology denpending on the actual industrial application.
康柏斯提供模块化的负压上料器、通过真空泵输送(P系列真空上料器)、或自带文丘里真空发生器(V系列真空上料器、需要客户提供压缩空气通过真空发生器产生真空源),以及负压集中输送系统,可以采用稀相输送技术,也可以采用密相输送技术,取决于具体实际应用。
Advantages 负压输送的优势
Disadvantages 负压输送的劣势

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