The Optimization Design Of Bag Filter In Artificial Fur Industry

The processes in artificial fur industry, which include perming fur, shearing and dyeing fur, would cause the effluence of pieces and particles. At present, bag filters are used for filtration in most industries. However, the application of these bag filters came with many problems, including low efficiency, high flow friction, high power consumption of blower and the vulnerability of the system etc.As for these problems, the development status of artificial fur industry is introduced in this dissertation, then the project is analyzed according to particularity of the industry. Combined with the original data, the condition and problems of the original filter are introduced, then an optimal design is proposed based on these problems, the innovation points of the design are listed below:(1) The positive pressure of the system is changed to negative to save the energy consumption;(2) Optimize the filter velocity to improve its efficiency;(3)Optimize the clean cycle to expand the service life;(4) Mend the angle of the air horn to make the air velocity much more uniform to stabilize the filtration.Selecting reasonable filtering materials, a bag filter test platform is established to test the influence of velocity and clean time on the performance of bag filter, including (1) the relation between the pressure loss, efficiency and the filtration rate in the filtering process.(2)propose the reasonable clean cycle and optimize the filter velocity to guarantee high efficiency and low resistance. Finally, the filter velocity is determined to be6.72m/min, and the clean cycle of8min is suggested.Meanwhile, the bag filter has been optimized through parameter design, technical arrangement and structural improvement, which include the design of filter area and bag specification, arrangement of the bag filter, optimization of the dust removal mechanism and the baghouse-box, selection of the filter material.Taking the optimal data calculated before into the fluent software to simulate the optimized bag filter, changing the angle of the air horn to analyze the airflow distribution. Conclusion can be made that while the angle of air horn remains between60°to75°, the air velocities in each bag are much more uniform, which could expand the service life and improve the filtering efficiency.Combined with the experimental study, engineering experiences and computer simulation, it is believed that this dissertation would provide a reasonable design model for fur factory to cut energy consumption and improve performance of filter, which will bring some economic benefit.