Series Design And Selection Software Development Of Micro-Porous Membrane Filter Plate With New Structure

With the rapid development of a series of heavy industries such as metallurgy,mining,cement,construction and so on,a large number of air pollutants are discharged.The air pollution is becoming more and more serious.Therefore,high filtration efficiency and low pressure drop dust collector equipment becomes particularly important.Bag filter is widely used in the field of dust removal because of its high efficiency and low operation cost.However,the traditional bag filter has a poor cleaning effect on high humidity dust,so our subject group designed a micro-porous membrane filter plate dust collector with new structure.The dust collector uses micro-porous membrane filter plate with new structure.Compared with the conventional filter plate,the filter plate has larger filtering surface,lower pressure drop and better cleaning performance to high humidity dust.Therefore,the product promotion of micro-porous membrane filter plate with new structure can effectively reduce the emission of air pollutants,and then contribute to the cause of environmental protection.In order to promote the plate,it is necessary to design the micro-porous membrane filter plate with new structure serially.This work aims at series design and selection software development of the micro-porous membrane filter plate with new structure,a series of works were carried out.Firstly,filtration material characteristics,filtration velocity,dust cleaning methods,injection pressure,dust collector structure and dust load were taken as factors.The main performance parameters of the micro-porous membrane filter plate with new structure,such as filtration efficiency,pressure drop,air volume,cleaning performance and economy,were analyzed by Analytic Hierarchy Process and Delphi method and the importance of the filter plate performance parameters were obtained.Secondly,based on the weight ranking of the performance parameters of the micro-porous membrane filter plate with new structure,the dust cleaning performance and filtration performance of the filter plate were studied by using the experimental and numerical simulation technology combined with the orthogonal experiment.The influence of structural parameters on its performance were analyzed and the structure optimization were carried out.Furthermore,according to the method of series design,the micro-porous membrane filter plate with new structure were designed serially by using the size change design method,and the product database was established.Finally,the selection software of the filter plate was developed by using Java Script language and product database.Through the above analysis,the following results are obtained:(1)Analytic hierarchy process(AHP)and expert investigation method were used to analyze the weight of the performance parameters of the micro-porous membrane filter plate with new structure.The results show that among the six evaluation factors,the order of weight is filtration material characteristics > dust collector structure >dust load > filtration velocity > cleaning methods > injection pressure.The weight of the five performance indexes is as follows: filtration efficiency > pressure drop > dust cleaning performance > economy > air volume.(2)The numerical model of the micro-porous membrane filter plate with new structure was verified.The results show that the errors between the experimental and simulated values of the average peak pressure of the filter plate and the pressure drop of the dust collector are respectively 19.11% and 10.3%.The 3D steady state flow model,the standard k – ε model and the porous medium theory are suitable for the numerical simulation of the filtration and dust cleaning performance of micro-porous membrane filter plate with new structure.(3)The dust cleaning equipment of micro-porous membrane filter plate with new structure were built and numerical model of micro-porous membrane filter with new structure with different structure parameters were established.The dust cleaning performances of the filter plate were studied by experiment and numerical simulation.The results show that the peak pressure of the side wall of the filter plate increases first and then decreases with the decrease of the height.With the increase of pulse width,the average peak pressure of filter plate also increases.In order to prevent the waste of gas,the pulse width of 100 ms should be selected.In order to make the filter plate have better filtration performance while meeting the requirements of dust cleaning performance,it is advisable to use a filter plate with the expanding-angle of24° and the length of 1400 mm and the width of 1200 mm.(4)The dust collector models with different structural parameters were established.The influences of the structure parameters of the filter plate on the filtration performance were studied.The result shows that if the expanding-angle,length and width of the filter plate are too large or too small,the filtration performance of the dust collector will be reduced.In order to make the micro-porous membrane filter plate with new structure have larger air volume and better flow field uniformity.We recommend to use the filter plate with the expanding-angle of 24 ° and the length of 1400 mm and the width of 1200 mm.(5)Based on the performance weight analysis and structure optimization of the micro-porous filter plate with new structure,the filter plate were designed serially and the product database were established.Finally,the Java Script language was used to develop the selection software,which provides the basis for the selection and application of the the micro-porous filter plate with new structure.