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Numerical Simulation On The Airflow Distribution And Movement Characteristics In The Electrostatic Precipitator

Posted on:2016-05-08Degree:MasterType:Thesis
Country:ChinaCandidate:T Y WangFull Text:PDF
GTID:2181330467489950Subject:Power Engineering and Engineering Thermophysics
Abstract/Summary:PDF Full Text Request
Humans since entering the21st century, with the rapid development of worldeconomy, energy consumption has more continuously, make people livingenvironment by each step.Among them, the most serious air pollution caused by theair pollution in the culprit is dust, while most of the dust in power plant emissions,this makes the particulate emissions from the burning of has aroused widespreadattention at home and abroad.Electrostatic precipitator as the main dust removalequipment of power plant, how to improve the efficiency of electrostatic precipitatorsresearchers become the electric hot issues of concern.Of dust particles and the airflowdistribution in electrostatic precipitators are the important factors influencing theelectric dust catcher.In order to optimize the flow field and studies the movement ruleof dust particles in the flow field, this article adopts the method of CFD within theelectric dust catcher on the flow field and to simulate the gas-solid two phase flowcalculation, the reasonable simulation method, for the design of the air distributionplate in electrostatic precipitators, adjustment and transformation to providecalculation basis.To improve the environmental benefit and economic benefit ofelectrostatic precipitators have important significance.Based on the analysis of the internal flow field at home and abroad about theelectric dust collector and dust movement, on the basis of the basic principle of usingthe commercial software Fluent to a300mw thermal power unit of the simulatedcalculation electrostatic precipitators.First, by using the standard model, based on theSIMPLE for simulating the flow field of electrostatic precipitators and compared withthe experimental results.For the electric dust catcher, to simulate the flow distributionplate using porous media model by adjusting the air distribution plate opening rate,formed in the electric field uniform flow field and air flow field.Then using eulerian-Lagrangian method, the continuous phase by using the standard model;The discrete phase discrete phase model and random walk model, two phase coupling simulationhas been done.On the basis of two kinds of flow field dust particle movement isanalyzed, and the fine particles are simulated, the comparative analysis of two kindsof flow field, the influence of the particle movement found inclined air flow field isrelatively uniform flow field, oblique jet flow field with electrostatic precipitator dustto complement and can improve the efficiency of dust removal.Then, the paperanalyzes the two kinds of particles in flow field wind speed of electric dust collectorand the movement and the influence of the dust removal efficiency, it is concludedthat the higher the wind speed dust removal effect is poorer.Numerical simulationresults show that the simulation method has certain reliability, can provide a basis forcalculation in the design of the electric dust catcher and transformation.At the sametime prove oblique flow more help to improve the efficiency of the electrictechnology.
Keywords/Search Tags:ESP, CFD, SGFT, air-particle two-phase flow
PDF Full Text Request
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