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1

Fluidization characteristics and separation performance of mild-hot gas-solid fluidized bed

Lv Bo, Luo Zhenfu, Zhang Bo, Zhao Yuemin, Qin Yunfei

Physicochemical Problems of Mineral Processing

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2019

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Vol. 55, iss. 1

184--195

EN

In recent years, the mild-hot gas-solid fluidized bed had a crucial influence on wet-in-feed sorting when it comes to moist feed (e.g., lignite) because of its expanding sorting range. To explain the favorable sorting effect of the mild-hot gas-solid fluidized bed, the fluidization characteristics (e.g., the pressure drop, density, etc.) was studied under different work conditions. In addition, a high-speed dynamic camera was used in this study to compare the slumping behavior of the magnetite slag at different temperatures. The optimum conditions for coal separation was also studied by Design-Expert software. It was shown that the bed temperature of the fluidized bed has a particular effect on its stability when the bed temperature was below 120 °C, which had a great influence on the separation. Finally, the probable deviation E of the mild-hot gas-solid fluidized bed under optimum operation conditions could be as low as 0.09 g/cm3 which showed the good separation ability.

2

On line diagnostics and self-tuning method for the fluidized bed temperature controller

Porzuczek J.

Archives of Thermodynamics

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2016

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Vol. 37, no. 1

31--46

EN

The paper presents the method of on-line diagnostics of the bed temperature controller for the fluidized bed boiler. Proposed solution is based on the methods of statistical process control. Detected decrease of the bed temperature control quality is used to activate the controller self-tuning procedure. The algorithm that provides optimal tuning of the bed temperature controller is also proposed. The results of experimental verification of the presented method is attached. Experimental studies were carried out using the 2 MW bubbling fluidized bed boiler.

3

Zmiany temperatury w złożu adsorbentu w początkowych cyklach procesu adsorpcyjno-desorpcyjnego

Kupiec K., Rakoczy J., Gwadera M.

Inżynieria i Aparatura Chemiczna

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2011

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Nr 5

64-65

PL

Wyznaczono maksymalne wartości temperatur, jakie mogą wystąpić w złożu adsorbentu w początkowych cyklach adsorpcyjno-desorpcyjnych zmien-nociśnieniowych. Rozważono proces rozdzielania parowej mieszaniny cta-nol-woda na zeolitach. Temperatury złoża wyznaczano eksperymentalnie oraz na podstawie obliczeń opartych na modelu matematycznym procesu. Zgodność wartości doświadczalnych i obliczeniowych jest zadowalająca.

EN

The maximum temperatures that can occur in the adsorbent bed in the initial pressure swing adsorption-desorption cyclcs have been determined. The process of adsorption separation of ethanol-water vapour mixture on zeolites has been considered. The bed temperatures have been determined experimentally and by calculations based on the mathematical model of the process. Good agreement exists between the experimental data and the results of simulations.