Dynamic control method of particle distribution uniformity in the rolling circulating fluidized bed (RCFB)

Abstract

This paper mainly proposed a dynamic control method of particle distribution uniformity in a rolling circulating fluidized bed (RCFB) by using an air distribution plate. An Euler-Euler numerical simulation approach which is called two-fluid flow model is used to simulate the behaviors multiphase flow within the RCFB. Six different tilt angles θ which are θ = 2°, 5°, 8°, 10°, 12°and 15°are used for the fixed inclination state of the RCFB, meanwhile, eight different inclined angles ϕ which are ϕ = −2°, −5°, 0°, 2°, 5°,8°, 10°and 12°are used for the location of the air distribution plate. After performing the simulation, the following three different conclusions are obtained. Firstly, with the increase of θ , serious uneven distribution behaviors for particles are founded at the lower position of the riser which is a part of the RCFB. Secondly, by adjusting ϕ, the uneven phenomenon of particles distribution behaviors is able to be alleviated no matter how θ changes for the RCFB. Thirdly, a function relation between θ and ϕ is obtained, which is verified by using the dynamic control method based on the dynamic mesh model in the RCFB.

Mitigation of Ship Emissions: Overview of Recent Trends

“…In contrast, roll frequency has a limited influence on particle shear and, thus, has a minor effect on particle distribution . In addition to the previous validation of rolling simulations, the effect of particle size on the abrupt exit of particles from the bed, particle Stokes number, heat transfer, and dynamic control of particle distribution in rolling circulating fluidized beds have also been studied …”

“…33 In addition to the previous validation of rolling simulations, 29 the effect of particle size on the abrupt exit of particles from the bed, 34 particle Stokes number, 35 heat transfer, 36 and dynamic control of particle distribution in rolling circulating fluidized beds have also been studied. 37 2.2. Wet Scrubbers.…”

Hydrodynamic Insights on Floating Bubbling Fluidized Beds: Dynamic Solutions for Mitigating Gas Maldistribution

“…In addition, research on rolling fluidized bed boilers has shown improvements in particle-towall heat transfer, despite challenges such as reduced local heat transfer coefficients under certain conditions [16]. Extensive research on moving fluidized bed reactors for marine applications addressed factors such as bubble/particle dynamics [17], particle mixing [18], distribution control [19], particle size [20], and rolling amplitude [21], providing insight into their potential in challenging marine environments.…”

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