Impinging Stream Simulation for Improving Coalescence Efficiency of Submicron Particles in Coal Combustion Process

doi:10.3969/j.issn.1000－7229.2016.11.018

Abstract

Abstract: The application of particle coalescence can effectively reduce the emission of submicron particles from coal-fired power plants. During the process of submicron particles coalescence, increasing the residence time of the particles can significantly improve the efficiency of submicron particles coalescence. This paper presents a kind of improved impinging stream applied in the coalescence reactor, and improves the flow pattern of traditional impinging stream in order to increase the residence time of submicron particles. The numerical simulation results of gas-solid two-phase flow show that compared with the traditional impinging stream, in the coalescence reactor, the residence time and the activity scope of the submicron particles in the flow field has been greatly increased by the improved impinging stream, which can finally dramatically increase the efficiency of submicron particles coalescence.

Key words: submicron particles, coalescence, impinging stream, residence time

CLC Number:

TM 621

WANG Kui, LIU Xueqing, LU Luyi. Impinging Stream Simulation for Improving Coalescence Efficiency of Submicron Particles in Coal Combustion Process [J]. Electric Power Construction, 2016, 37(11): 123-.

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