Flow Field Optimization on the Catalyst Layer Breakage Failure of the SCR-DeNOx System for a Coal-fired Power Plant

doi:10.11930/j.issn.1004-9649.201708274

Abstract

Abstract: To resolve the problem of serious attrition occurred in the catalyst layer of a domestic 300 MW unit, a static disc mixer is adopted to replace the conventional diversion plate. The distribution of the gas-solid two-phase flow field is measured by the industrial test and the boundary conditions are determined accordingly. The velocity of flue gas and soot, and the distribution of mass concentration of soot in the SCR denitrification system are studied using the computational fluid dynamics method. The optimized scheme is eventually applied to the SCR denitrification retrofit project. The results show that the wear of the catalyst is mainly caused by the uneven mixing of smoke and dust in the flue,and the improper installation of the diversion plate closest to the catalyst.The problem of uneven gas-solid two-phase mixing in the inlet section of the catalyst for SCR denitrification system is resolved under lower pressure resistance,which effectively prolongs the service life of the catalyst.

Key words: coal-fired power unit, catalyst breakage, SCR-based denitration, numerical simulation, deflector, disk static mixer

CLC Number:

X511
TM621.9

LEI Jianqi. Flow Field Optimization on the Catalyst Layer Breakage Failure of the SCR-DeNO_x System for a Coal-fired Power Plant[J]. Electric Power, 2018, 51(7): 152-156,169.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201708274

https://www.electricpower.com.cn/EN/Y2018/V51/I7/152

References

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Flow Field Optimization on the Catalyst Layer Breakage Failure of the SCR-DeNO_x System for a Coal-fired Power Plant

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