Study on Flow Characteristics in Honeycomb Tube Wet Electrostatic Precipitator

doi:10.12096/j.2096-4528.pgt.19179

Abstract

Abstract:

Wet electrostatic precipitation technology can effectively reduce the concentration of soot emission during thermal power generation. In order to study the effect of spray on the internal flow field of wet electrostatic precipitator during operation, the position of nozzle and the internal flow field of the wet electrostatic precipitator before and after using the nozzle were simulated by using the computational particle fluid dynamics (CPFD) method, the flow field, droplet distribution and spray trajectory were analyzed. The results show that when the nozzle is started, the velocity of flue gas near the nozzle is increased, and the velocity field of flue gas in the honeycomb tube is uneven. When the nozzle is arranged in the tube, it will accelerate the velocity of flue gas in the tube, which is not conducive to dust capture. The research results provide a theoretical reference for the adjustment of atomization region in practical engineering.

Key words: thermal power generation, computational particle fluid dynamics (CPFD), wet electrostatic precipitator, two-phase flow, numerical simulation, spray

CLC Number:

TK 09

Chunxi DAI, Ping LIANG, Deyong CHE, Haiting LIU. Study on Flow Characteristics in Honeycomb Tube Wet Electrostatic Precipitator[J]. Power Generation Technology, 2022, 43(1): 155-159.

Figures/Tables 6

Fig. 1 Structure of honeycomb tube wet electrostatic precipitator

Fig. 2 Velocity distribution of droplets

Fig. 3 Velocity vector distribution of flue gas

Fig. 4 Velocity field distribution of flue gas in vertical direction

Fig. 5 Velocity field distribution of flue gas in horizontal direction

Fig. 6 Variation of flue gas velocity on vertical centerline

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