气力输送基本的形式有正压输送和负压输送，主要分为四种：负压稀相输送、正压稀相输送、正压浓相输送、混合式。根据料气比的不同，稀相输送和浓相输送有区别（没有统一的划分标准）。尽管形式多样，但它们是在正压输送和负压输送的基础上发展起来的。下面小编分享关于正压输送的工作原理以及系统特点的内容，欢迎阅读！

The basic forms of pneumatic conveying include positive pressure conveying and negative pressure conveying, which are mainly divided into four types: negative pressure dilute phase conveying, positive pressure dilute phase conveying, positive pressure dense phase conveying, and mixed conveying. According to the different material to gas ratios, there are differences between dilute phase transportation and dense phase transportation (there is no unified classification standard). Although they have various forms, they have developed on the basis of positive pressure conveying and negative pressure conveying. Below, the editor will share the working principle and system characteristics of positive pressure conveying. Welcome to read!

正压输送的工作原理：

The working principle of positive pressure conveying:

1.进料阶段：进料阀和排气阀打开，物料自由落入泵体内，料满后，料位计发出信号，进料阀和排气阀自动关闭，完成进料过程；

1. Feeding stage: The feeding valve and exhaust valve are opened, and the material freely falls into the pump body. When the material is full, the level gauge sends a signal, and the feeding valve and exhaust valve automatically close to complete the feeding process;

2.流化加压阶段：打开进气阀，压缩空气进入泵体上部及底部，上部加压，下部空气扩散后穿过流化床，使物料呈流态化状态，同时泵内压力上升；

2. Fluidization and pressurization stage: Open the intake valve, and compressed air enters the upper and lower parts of the pump body. The upper part is pressurized, and the lower part diffuses and passes through the fluidized bed, making the material in a fluidized state. At the same time, the pressure inside the pump increases;

3.输送状态：当泵内压力达到一定值时，压力表或压力开关发出信号，出料阀自动打开，流化床上的物料流化加强，输送开始，泵内物料逐渐减少，此时流化床上的物料始终处于边流化边输送的状态；

3. Transportation status: When the pressure inside the pump reaches a certain value, the pressure gauge or pressure switch sends a signal, the discharge valve automatically opens, and the material fluidization on the fluidized bed strengthens. Transportation begins, and the material inside the pump gradually decreases. At this time, the material on the fluidized bed is always in a state of fluidization and transportation at the same time;

4.吹扫阶段：当泵内物料输送完毕，压力下降到管道阻力时，压力表或压力开关发出信号，通气延续一定时间，压缩空气清扫管道，然后进气阀关闭，间隔一段时间，关闭出料阀，打开进料阀，完成一次输送循环。

4. Purging stage: When the material inside the pump is transported and the pressure drops to the resistance of the pipeline, the pressure gauge or pressure switch sends a signal, and the ventilation continues for a certain period of time. Compressed air is used to clean the pipeline, and then the inlet valve is closed. After a period of time, the discharge valve is closed, and the inlet valve is opened to complete a conveying cycle.

正压输送系统特点：

Characteristics of positive pressure conveying system:

1、系统具有较高压力、耗气量较小;

1. The system has high pressure and low air consumption;

2、较低流速但输送能力大，对物料品质几乎无影响;

2. Low flow rate but high conveying capacity has almost no impact on material quality;

3、控制系统自动化，对各种电气元件的要求高;

3. Control system automation requires high requirements for various electrical components;

4、可以多点进料和多点卸料;

4. Can be fed and unloaded at multiple points;

5、输送量大，适合于短距离或中等距离的气力输送。

5. Large conveying capacity, suitable for short or medium distance pneumatic conveying.

正压输送系统是采用气力输送方式输送粉末状物料，可根据具体地形布置输送管道，实现集中、分散、大高度、长距离输送，输送过程不受气侯条件影响，能确保物料不受潮，利于生产和环境保护，具有高效、节能环保等特点。正压输送系统广泛应用于电力、冶金、石油化工、塑料、食品、建材及水电行业。

The positive pressure conveying system uses pneumatic conveying to transport powdered materials. The conveying pipelines can be arranged according to specific terrain to achieve centralized, dispersed, high height, and long-distance transportation. The conveying process is not affected by weather conditions, ensuring that the materials are not affected by moisture, which is beneficial for production and environmental protection. It has the characteristics of high efficiency, energy conservation, and environmental protection. Positive pressure conveying systems are widely used in industries such as electricity, metallurgy, petrochemicals, plastics, food, building materials, and hydropower.

本文由负压气力输送为您提供，我们的网站是：我们将以全心全意的热情为您提供服务，欢迎您的访问！

This article is provided to you by negative pressure pneumatic conveying. Our website is: We will provide you with wholehearted enthusiasm and welcome your visit!