Process Modelling Vertical Screw Transport of Bulk Material Flow

Evstratov, V. A.; Rud, A.V.; Belousov, K.Yu.

doi:10.1016/j.proeng.2015.12.134

Cited by 12 publications

(3 citation statements)

References 1 publication

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“…Orthogonal experimental design is also called orthogonal design, which is a design method to study many factors and levels. The orthogonal experiment can not only select the representative experimental combination in the experimental area, but also analyze the better parameter combination in the range method [10][11]. From the formula (1), it can be known that the flow rate of the screw conveyor is related to many factors, and formula (2) gives the relationship between the pitch and the outer diameter of the blade.…”

Section: Orthogonal Variable Settingmentioning

confidence: 99%

Structure Optimization Design of Screw Conveyor based on EDEM

Zhao

Guo

Gao

et al. 2022

J. Phys.: Conf. Ser.

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Screw conveyors are widely used in the transportation of various media in the industry because of their simple structure and low cost. However, some special powders are prone to accumulation during transportation due to their low density, large angle of repose, and poor fluidity, resulting in low transportation accuracy and unable to meet actual working conditions. In this paper, the discrete element method is used to simulate and analyze the powder transportation. The three-dimensional model of the screw conveyor is established and imported into the EDEM software for simulation simulation. The key parameters of the screw conveyor are screw inner diameter, pitch and speed as design variables. Hand in the experiment, and get the optimal solution of the variable parameters through the experimental results.

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Section: Orthogonal Variable Settingmentioning

confidence: 99%

Structure Optimization Design of Screw Conveyor based on EDEM

Zhao

Guo

Gao

et al. 2022

J. Phys.: Conf. Ser.

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“…Bortolamasi and Fottner (2001) reported that the minimum pitch in the screws should be at least one half of the screw diameter, while the maximum pitch should be approximately equal to one screw diameter. Similarly, Evstratov et al (2015) concluded that the pitch should not be less than 0.9 and not more than 1.5 times the outer diameter of the screw. Martelli (1983) argues that the ratio of pitch to screw diameter equal to one (known as standard flight) has been also chosen as one of the simplest and optimal options in singlescrews and that it is the most common in industrial practice (see also : Carleton et al, 1969;Campuzano et al, 2019).…”

Section: Numerical Analysis Of Temperature Distributionmentioning

confidence: 99%

Chemical and Process Engineering

Ledakowicz,

Piddubniak

2021

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The non-stationary problem of temperature distribution in a circular cylindrical channel of infinite length filled with a homogeneous biomass material moving with a constant velocity in the axial direction was investigated. The heat source was a shaftless helical screw (or auger), which was heated with an electric current due to the Joule-Lenz effect and rotated uniformly around the axis of symmetry of the channel. Similar problems arise in the thermal processing of biomaterials using screw conveyor in pyrolysis and mass sterilization and pasteurization of food products. The problem is solved using the expansion of given and required functions in Fourier series over angular coordinate and integral Fourier and Laplace transforms over axial coordinate and time, respectively. As a result, the temperature field is obtained as the sum of two components, one of which, global, is proportional to time, and the other, which forms the microstructure of the temperature profile, is given by Fourier-Bessel series. The coefficients of the series are determined by the integrals calculated using the Romberg method. Based on the numerical calculations, the analysis of the space-time microstructure of the temperature field in the canal was performed. A significant dependence of the features of this microstructure on the geometric, kinematic and thermodynamic characteristics of the filling biomass and the screw was revealed.

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“…Rademacher 3 studied the effect of conveying section and inlet section on delivery capacity by theoretical derivation. Evstratov et al 4 theoretically established an applicable model of granular flow movement in vertical screw conveyor, and adequate mathematical analysis of conveying process were given, but relevant experiments was not carried out to validate the theoretical model.…”

Section: Introductionmentioning

confidence: 99%

Dynamic characteristic analysis of vertical screw conveyor in variable screw section condition

Yuan

et al. 2020

Science Progress

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Vertical screw conveyors are used widely in industry for elevating bulk materials over relatively short distances, but the problem of insufficient feeding and low conveying efficiency always exist in the vertical conveying process. In this paper, a vertical screw conveyor with variable screw section is presented, and the characteristics of vertical screw conveyor are investigated under the variable screw sections using discrete element method (DEM). The results show that the particle volume fraction in the inlet and the mass flow rate increase in the condition of variable screw section, and the screw rotational speed has a significant influence on mass flow rate. It is evident that the design of variable screw section provides an effective way in improving the particle feeding rate and the conveying efficiency.

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Process Modelling Vertical Screw Transport of Bulk Material Flow

Cited by 12 publications

References 1 publication

Structure Optimization Design of Screw Conveyor based on EDEM

Structure Optimization Design of Screw Conveyor based on EDEM

Chemical and Process Engineering

Dynamic characteristic analysis of vertical screw conveyor in variable screw section condition

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