Analysis of flow field in 300 m<sup>3</sup> pre-ash tank of ammonia-alkali distillation system

化学工业与工程

Chemcial Industry and Engineering

2022, Vol. 39

Issue (6) :117-126 DOI: 10.13353/j.issn.1004.9533.20220113

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Analysis of flow field in 300 m³ pre-ash tank of ammonia-alkali distillation system

WAN Li¹, YING Hu¹, XIAO Yanjun¹, JIN Yan², SONG Xingfu³, LIU Chenglin³

1. Jiangxi Jinghao Salination Co., Ltd., Jiangxi Zhangshu 330046, China;
2. Suzhou Synovo Green Tech Co., Ltd., Jiangsu Changshu 215513, China;
3. East China University of Science and Technology, National Engineering Research Center for Integrated Utilization of Salt Lake Resources, Shanghai 200237, China

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Abstract Ammonia distillation is necessary for producing soda ash by the ammonia-alkali way. In ammonia distillation, the stirring and mixing effect in the pre-ash tank significantly influences the efficiency of ammonia steaming. Therefore, the systematic study of the flow field distribution in the pre-ash barrel has specific practical significance for developing the soda ash industry. In this paper, the CFD method is used to calculate the fluid flow in the pre-ash bucket, and the flow field distribution in the pre-ash bucket with the commonly used chain-type agitator in the industry is analyzed. Moreover, the flow field distribution of the three propellers of pitched blade turbine, six-blade (45°) pitched-blade disc turbines, and six-blade disc turbines was analyzed. The results show that the mixing effect of the double-layer six-slanted-blade disc turboprop is the best. The research results provide reference for the selection and design of pre-ash tank mixing equipment in the ammonia-alkali process.

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	WAN Li
	YING Hu
	XIAO Yanjun
	JIN Yan
	SONG Xingfu
	LIU Chenglin

Keywords： soda ash industry pre-ash tank computational fluid dynamics

Received 2022-01-27;

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WAN Li, YING Hu, XIAO Yanjun, JIN Yan, SONG Xingfu, LIU Chenglin.Analysis of flow field in 300 m³ pre-ash tank of ammonia-alkali distillation system[J] Chemcial Industry and Engineering, 2022,V39(6): 117-126

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