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Why pneumatic conveying equipment is a good choice for short distance transportation
2019-08-22 Source: wglobalnba.com Author: Rich Machinery read: Times
Pneumatic conveyance has been used as a bulk material conveyer for more than 100 years in foreign countries, because it has higher conveying efficiency, simple equipment structure, convenient maintenance and management, easy to implement automation, and is more convenient than conventional mechanical and vehicle transportation. Many unique advantages such as environmental protection. Therefore, it is widely used in thermal power, steel smelting, cement and other industries for loading, unloading, storage, transportation, and powder engineering unit operations. Secondly, as the country's environmental protection requirements become more stringent, improving the status of industrial dust pollution will greatly promote the continuous development of the pneumatic conveying industry.
Energy consumption is the power consumption (pressure drop) in the pneumatic conveying process. Reducing the energy consumption can reduce the pressure drop per unit conveying length and extend the conveying distance. The pressure drop of pneumatic conveying is related to many factors, among which the complex and changeable is the nature of the conveying material. Different types, particle sizes, and water powders have different pneumatic conveying rules. For the same powder, particle size, distribution, and water content are the main factors affecting the fluidity of the powder. The smaller the particle size, the wider the distribution, the higher the water content, and the worse the fluidity, the more difficult the pneumatic transportation is.
In the long-distance pneumatic conveying tube, the movement of solid particles has both rolling and suspension. At the same time, solid particles and solid particles, solid particles and wall surface collision, solid particle rotation also generates lifting force, it is quite complicated to consider these issues completely. .
The dual-sleeve pneumatic conveying system was originally designed to solve the problem of long-distance blockage of fly ash transportation in the power industry. Its transmission pipeline has a unique structure, which can ensure that the pipeline is not easily blocked during the transportation process, and improves the safety of powder transportation. And reliability. A small pipe with openings is set in the conveying pipeline, and the distance between the openings is related to the conveying material. When the powder accumulation in the conveying pipe is too high, the air flow will preferentially flow from the small pipe and be ejected from the next hole at a higher air velocity, washing the leeward surface of the accumulated powder, reducing the height and length of the powder accumulation. So as to ensure the normal transportation of powder.
The powder can be transported because it has flow characteristics to a certain extent, and the reason why the pipeline is blocked is caused by poor fluidity and caused by sedimentation. Therefore, the powder has good fluidity and is important for stable transportation. Fluidization is to bring the solid particle layer into contact with the gas or liquid passing therethrough, thereby transforming it into a state similar to a fluid, and meeting the process requirements that are conducive to the flow of particulate material.

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