正压气力输灰系统是行业中常用的系统，适用于大多数给料机，如文丘里、螺杆泵和仓泵。通过在管道系统上附加一个双向阀，可以实现多点卸载和进料。然而，过多的多点馈线会造成大量的空气泄漏。特别是对于旋转刀片给料机，泄漏约占总供气量的20%。

Positive pressure pneumatic ash conveying system is a common system in the industry, which is suitable for most feeders, such as venturi, screw pump and bin pump. By attaching a two-way valve to the pipeline system, multi-point unloading and feeding can be realized. However, too many multipoint feeders will cause a lot of air leakage. Especially for the rotary blade feeder, the leakage accounts for about 20% of the total air supply.

负压气力输灰系统适用于将物料从多个供应点运送到一个卸料点。其优点是通过给料机的漏风和压降非常小，使旋片给料机能够产生满意的效果。负压气力输灰系统是国内常用的小体积水泥堆场卸料系统。

The negative pressure pneumatic ash conveying system is suitable for transporting materials from multiple supply points to one unloading point. Its advantage is that the air leakage and pressure drop of the feeder are very small, so that the rotary feeder can produce satisfactory results. Negative pressure pneumatic ash conveying system is a commonly used unloading system for small volume cement storage yard in China.

混合系统比普通混合系统能更好地输送材料。在许多车间，普通的混合系统是短程物料输送的理想选择，但系统压力低限制了物料的输送量和输送距离。两级混合系统采用中间室将负压气力输灰系统与正压气力输灰系统分离，并将负压气力输灰系统和正压系统所需的气源分为两个独立的供气装置，让您分别选择优的真空泵和空压机。由于有两个独立的系统，整个系统需要一个气体分离器。诠释正压气力输灰系统与负压的选择的要点-给料机

The mixing system can transport materials better than the ordinary mixing system. In many workshops, the ordinary mixing system is an ideal choice for short-range material conveying, but the low system pressure limits the conveying capacity and distance of materials. The two-stage mixing system adopts an intermediate chamber to separate the negative pressure pneumatic ash conveying system from the positive pressure pneumatic ash conveying system, and divides the air source required by the negative pressure pneumatic ash conveying system and the positive pressure system into two independent air supply devices, so that you can choose excellent vacuum pump and air compressor respectively. Since there are two independent systems, the whole system needs a gas separator. Explain the key points of the selection of positive pressure pneumatic ash conveying system and negative pressure - feeder

给料机

Feeder

正压气力输灰系统与负压的选择的要点关键是看给料机，选择给料机是系统设计中重要的因素。各种给料机都有系统压力的佳使用范围。其中仓泵一般用于高压间歇运行。旋片式给料机和双瓣阀给料机可用于气力输灰系统和负压供应，但通常限制在较低的压差范围内。螺杆泵在高压下工作良好，但在实际使用中，它们仍然局限于中、低压范围。负压吸入喷嘴只用于负压气力输灰系统和混合系统。换句话说，给料机的选择综合考虑乘客压力值、漏风、压降和流量控制以及特定物料的适用性等因素。

The key point of the selection of positive pressure pneumatic ash conveying system and negative pressure is to look at the feeder, and the selection of feeder is an important factor in the system design. All kinds of feeders have a good application range of system pressure. The bin pump is generally used for high-pressure intermittent operation. Rotary vane feeder and double flap valve feeder can be used for pneumatic ash conveying system and negative pressure supply, but they are usually limited to a low differential pressure range. Screw pumps work well under high pressure, but in practical use, they are still limited to the range of medium and low pressure. Negative pressure suction nozzle is only used for negative pressure pneumatic ash conveying system and mixing system. In other words, the selection of feeder comprehensively considers factors such as passenger pressure value, air leakage, pressure drop and flow control, as well as the applicability of specific materials.

额定压力值。由于不同的管道压降和管道内径适用于不同的设备，应考虑选择额定压力较高的给料机来供应较小的管径管道。对于特定的管道内径，给料机在较大额定压力下产生较大吞吐量。

Rated pressure. Since different pipe pressure drop and pipe inner diameter are applicable to different equipment, the feeder with higher rated pressure should be considered to supply pipes with smaller diameter. For a specific pipe inner diameter, the feeder produces a large throughput under a large rated pressure.

压降。通过给料机的压降应该尽可能小。普通螺杆泵和仓式泵的压降分别为50kpa和20kpa左右。文丘里给料机的压降与气力输灰系统输送管道的压降基本相同。旋叶式给料机和双瓣式给料机的压降可以忽略不计。

Pressure drop. The pressure drop through the feeder should be as small as possible. The pressure drop of ordinary screw pump and bin pump is about 50kPa and 20KPa respectively. The pressure drop of Venturi feeder is basically the same as that of pneumatic ash conveying system. The pressure drop of rotary vane feeder and double flap feeder is negligible.

流控制。如果需要保持供料量恒定，建议采用螺杆泵、气锁旋叶给料机、双瓣阀给料机，以保证定量供料，满足气锁要求。文丘里给料机不能提供气闸，需要计量设备来维持稳定的供应。燃料泵在排放时调节料气混合物的流量，以实现流量控制。

Flow control. If it is necessary to keep the feeding volume constant, screw pump, air lock rotary vane feeder and double flap valve feeder are recommended to ensure quantitative feeding and meet the air lock requirements. Venturi feeders cannot provide airlocks and require metering equipment to maintain a stable supply. The fuel pump regulates the flow of the feed gas mixture during discharge to realize flow control.

给料机有很多种，如旋片式给料机、螺杆泵、仓式泵和温弗莱泵，它们的性能各不相同。提供了各种馈线的选择指南。你需要考虑的气力输灰系统操作压力范围的馈线和供应的体积和供应距离的限制。

There are many kinds of feeders, such as rotary vane feeder, screw pump, bin pump and Winfrey pump, and their performance is different. Guidelines for the selection of various feeders are provided. You need to consider the limits of feeder and supply volume and supply distance in the operating pressure range of pneumatic ash conveying system.

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The above is the wonderful content that Jiangsu pneumatic conveying equipment Xiaobian brought to you today. For more wonderful content, please click to enter our website http://www.sddyfd.com/