2~*600MW Unit Of Electric Bag Composite Dust Precipitator Flow Field Simulation And Optimization

As the national pollutant discharge standard for electricity production control, state and local gradually make careful to smoke particle pollution and mandatory requirements, electricity compound bag dust collector and the feature of high efficiency, energy saving in the field of flue gas dust removal and get more and more widely used, large coal-fired power station USES electric bag complex filter has become a trend. At present, the compound bag precipitator in use and partial wear, still exist in the process of large-scale pipeline damaged internal parts wear, cloth bag dust collector and dust removal efficiency is lower, these are linked to internal smoke flue or dust catcher the relationship between the air flow field distribution is not reasonable, therefore, flue gas fluid dynamics has become dust removal equipment dust removal efficiency and the service life of one of the main limiting factors, and become the difficulty of filter design.In Inner Mongolia, Beijing lung power generation co., LTD. This paper electrostatic precipitator electrostatic compound instead of2x600mw dust and flue as the research object, using CFD numerical simulation technology, through the precipitator flue and internal structure parameters optimization, the optimization of flow field to implement the filter. Content including optimal design of flue dust collector connection guiding device and make the necessary structure modification, optimization of filter inlet air distribution plate, guide vane and electrical bag area the design of the air distribution plate, the influence of design parameters of the flow field, finally, implement the following parameters:(1) the dust chamber inlet flue flow deviation is less than2.5%;(2) dust chamber, especial the import section relative root mean square value of the flue gas velocity is less than0.25;(3) small flue resistance, filter resistance, avoid the flue, air flow uniform plate and a bag of partial abrasion;(4) good load adaptability,50%,75%,100%and115%, namely BMCR load under the above parameters.