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| Numerical simulation of flow field on desulphurization through electrostatic spraying of lime slurry |
| 1.School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Lanzhou LS Heat Exchange Equipment Co., Ltd., Lanzhou, Gansu 730050, China; 3. Shanghai Electric Machinery Co., Ltd.(SEC), Shanghai 200240, China) |
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Abstract In order to investigate the mechanism of lime slurry droplet charging and absorbing SO2, the electrostatic spraying twophase flow field of lime slurry was numerically simulated. Geometric model, electrostatic model and twophase flow model were established based on the characteristics of desulphurization tower and charge electron spray desulphurization. The characteristic of ringlike electrostatic field was obtained by extending commercial Fluent 6.3 function to achieve the coupled simulation between electrostatic field and twophase flow field. The two phase flow characteristics and desulphurization effect under the condition of slurry electric charge were analyzed. The results show that the distribution of electric intensity is basically symmetrical about the desulfurization tower axis. The electric intensity decreases rapidly with the increasing of distance away from electrode. The outboard entrainment zone is increased and the velocity is decreased by electron charge in slurry drop, and the zone near electrode effected by jet flow is shortened to strengthen the two phase contact and SO2 absorption. The electrostatic charged desulphurization with same flows direction is better than that with opposite flow direction.
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2012, Vol. 33 
