Study on Gas–Solid Two–Phase Flow Characteristics of One–Furnace with Two–Tower Semi–Dry Desulfurization in Circulating Fluidized Bed Boiler

Xueshen Wang (), Zheng Gan, Shengwei Xin and Chunzhen Yang
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Xueshen Wang: Sichuan Baima CFB Demonstration Power Plant Co., Ltd., Neijiang 641005, China
Zheng Gan: Sichuan Baima CFB Demonstration Power Plant Co., Ltd., Neijiang 641005, China
Shengwei Xin: CHN Energy Group CFB Technology R&D Center, Xi’an 710065, China
Chunzhen Yang: CHN Energy Group (Shandong) Energy & Environment Co., Ltd., Jinan 250061, China

Energies, 2023, vol. 16, issue 4, 1-13

Abstract: A single–phase flow model was used to analyze the uniformity of the flow field in the desulfurization tower under different baffle combinations, and a multiphase flow model was used to explain the gas and solid two–phase flow characteristics and chemical reaction characteristics in the tower. The stability of the flow behavior of gas and solids in one furnace and two towers was discussed. The results show that the installation of shielding plates at appropriate positions in the tower for sulfur removal is beneficial to enhance the uniform distribution of flow in space, reduce the pulsation interference of bed pressure in the tower, keep the state of gas and solid flow unchanged, and maintain the efficiency of desulfurization at a high level. Reducing the instability of gas–solid two–phase flow is the basis of ensuring the stable switching between single and double towers.

Keywords: circulating fluidized bed; semi–dry desulfurization; gas–solid two–phase flow; one furnace with two desulfurization towers; switching between single tower and double towers (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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