A Composite Pneumatic Conveying Swirl Elbow

Abstract

Provided is a composite pneumatic transport rotational flow elbow pipe. The composite pneumatic transport rotational flow elbow pipe includes a pipe body for transporting fluid; the pipe body includesan inlet straight pipe part, an elbow pipe part and an outlet straight pipe part. The inlet straight pipe part includes an inlet straight pipe segment, a gas-solid mixture inlet, a rotational flow gas inlet, a rotational flow gas mixing chamber and a rotational flow generation hole; the elbow pipe part includes an elbow pipe segment, a primary rotational flow generation pipe and a secondary rotational flow generation pipe; the outlet straight pipe part includes an outlet straight pipe segment and a gas-solid mixture outlet which is formed in the end portion of the outlet straight pipe segment. By adopting the composite pneumatic transport rotational flow elbow pipe, adequate rotational flow gas can be generated, rotational flow transportation is achieved, collision and friction between particles and a pipe wall are effectively reduced, the material transport quality is improved, the service life of the composite pneumatic transport rotational flow elbow pipe is effectively prolonged,meanwhile, local pressure loss is reduced, and the working efficiency of a pneumatic transport system is improved.

Description

technical field [0001] The invention relates to a coal particle pneumatic conveying pipeline, in particular to a composite pneumatic conveying swirl elbow. Background technique [0002] Coal is the basic energy and important raw material of our country, and the coal industry is related to the lifeline of the national economy. With the rapid development of the national economy, my country's demand for coal is increasing day by day. The coal transportation link occupies a large proportion of the cost of coal mining. The existing underground transportation equipment and supporting facilities are complicated, and safety accidents occur frequently. Pneumatic conveying is a transportation technology that uses airflow at a certain pressure and speed to convey granular materials. It has been widely used in petroleum, chemical and food processing and other fields. It is clean, green and has a high recycling rate. [0003] However, in the current process of coal pneumatic transporta...

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Problems solved by technology

[0003] However, in the current process of coal pneumatic transportation, pipeline wear is still unavoidable, resulting in low energy efficiency in transportation, and a large amount of coal dust overflows and pollutes the environment, especially in elbow pipes.

In addition, the pressure loss in the pneumatic conveying system includes pressure loss along the way and local pressure loss. It is mainly manifested as local pressure loss at the bend. The velocity and flow direction of the particle flow change sharply with the bend, resulting in a velocity gradient and resulting in a flow field Turbulent flow is formed inside, which intensifies the collision and fragmentation between particles

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