Structural design finalizing method based on material test and DEM-CFD (discrete element method and computational fluid dynamics) simulation coal transport system

Abstract

A structural design finalizing method based on material test and DEM-CFD (discrete element method and computational fluid dynamics) simulation coal transport system is based on the material test; through DEM and coupled simulation of DEM and CFD, system performance analysis is performed on the structure of the coal transport system before processing and manufacture; verification on design scheme performances helps a designer find potential problems of the system so as to finally determine an optimal design scheme.

Description

technical field [0001] The invention belongs to the technical field of bulk material transportation, and in particular relates to a method for designing and finalizing the structure of a coal transportation and transportation system based on material testing and DEM-CFD simulation. Background technique [0002] The problems existing in the coal handling and transfer system are basically caused by structural design defects; in the traditional design, the equipment of the transfer system, such as "head funnel, chute and guide chute, etc. Selection Manual" for selection, the equipment selection of the dust collector is calculated and confirmed according to empirical formulas; the traditional transfer system design does not consider the characteristics of the conveying medium and the trajectory of material throwing, throwing out uncontrollable material flow at the unloading point of the belt conveyor and letting it go When the air passes through the material flow, it will disper...

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Problems solved by technology

[0002] The problems existing in the coal handling and transfer system are basically caused by structural design defects; in the traditional design, the equipment of the transfer system, such as "head funnel, chute and guide chute, etc. Selection Manual" for selection, the equipment selection of the dust collector is calculated and confirmed according to empirical formulas; the traditional transfer system design does not consider the characteristics of the conveying medium and the trajectory of material throwing, throwing out uncontrollable material flow at the unloading point of the belt conveyor and letting it go When the air passes through the material flow, it will disperse and entrain fine dust particles, forming a large amount of flying dust; the design of the chute is basically a corner design and vertical falling, which is easy to cause the material to move too fast in the chute. Large, the chute wears seriously and is easy to accumulate or even block materials; at the discharge point, the material has a strong impact on the receiving belt, which is likely to cause incorrect material discharge and eventually cause the belt to deviate; the dust spillover from the material guide chute is serious, and the dust concentration in the environment of the transfer system exceeds the standard , which seriously affects the physical and mental health of the operators; more than 80% of the downtime in the coal transportation system is caused by the maintenance of the transportation system, which seriously affects the operation efficiency of the transportation system and causes unnecessary economic losses

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