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Chemcial Industry and Engineering 2023, Vol. 40 Issue (6) :78-88    DOI: 10.13353/j.issn.1004.9533.20230158
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Thermal performance and pressure drop in a gas-solid circulating fluidized bed spiral plate heat exchanger
JIANG Feng1,3, Sun Xingyi1, QI Guopeng2, LI Xiulun1
1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. School of Biological and Environment Engineering, Tianjin Vocational Institute, Tianjin 300410, China;
3. Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, Tianjin 300350, China

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Abstract In this study, the fluidized bed heat transfer and fouling prevention technology is applied to the gas-phase heat transfer process in spiral plate heat exchanger, and a gas-solid circulating fluidized bed spiral plate heat exchanger is designed and built. The effects of operating parameters such as air flow rate (80—125 m3·h-1), particle addition (0.5%—2.0%) and particle type on the heat transfer performance and pressure drop of circulating fluidized bed spiral plate heat exchanger using constant temperature water as hot fluid, air as cold fluid and three kinds of solid particles as solid working medium are studied. The experimental results show that the addition of particles can obviously improve the heat transfer performance of the spiral plate heat exchanger, but also increase the pressure drop. Within the range of operating parameters investigated in the experiment, the heat transfer enhancement factor of the best heat transfer enhancement effect can reach 29.28%. At this time, the particles added in the system are polyformaldehyde particles, the air flow rate is 125 m3·h-1, and the amount of added particles is 2.0%, but the corresponding pressure drop ratio also reaches 20.86%. The three-dimensional diagrams of heat transfer enhancement factor and pressure drop ratio and the comprehensive influence radar diagrams are drawn which can guide the industrial applications.
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JIANG Feng
Sun Xingyi
QI Guopeng
LI Xiulun
Keywordsgas-solid circulating fluidized bed   enhancement of heat transfer performance   pressure drop   spiral plate heat exchanger     
Received 2023-04-05;
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JIANG Feng, Sun Xingyi, QI Guopeng, LI Xiulun.Thermal performance and pressure drop in a gas-solid circulating fluidized bed spiral plate heat exchanger[J]  Chemcial Industry and Engineering, 2023,V40(6): 78-88
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