Numerical Simulation And Analysis Of Internal Flow Field In Sinter-Plate Filter And The Airflow Of Pulse Cleaning Process

In the process of disposing high humidity and high temperature industrial exhaust, the bag of the traditional filter was more likely to be hardened, which impacted the ash removal effect and shortened its service life. Otherwise, the new sinter-plate filter had the advantage of high temperature and corrosion resistance, but can not get further study and application. This paper would provide guidance for the adhibition and optimization of sinter-plate filter through numerical simulation of inner flow field and pulsating dust-cleaning airflow in the tobacco primary processing.(1) Based on the CFD, the model of the sinter-plate filter was set up to explore the influence of the different installation spacing on the internal flow field and the air distribution. Furthermore, using the coefficients of the flow allocation, the air distribution was analyzed. According to the result, the flow allocation of each filter element was more uniform and the air distribution was improved along with the installation spacing increasing.(2) The model of three-dimensional unsteady pulse cleaning was set up to explore the influence of different quantities of nozzle, the nozzle diameter, the pulse-jet pressure, the pulse duration and the pulse-jet distance on the peak pulse pressure. The numerical simulation results showed that the pulse duration has little influence on the peak pulse pressure, but the influence of other factors is significant.(3) Using the response surface methodology, a quadratic regression equations of the peak pulse pressure and the peak pulse pressure arrival time were established, which can be used to analyze the influence of the pulse-jet distance, the pulse-jet pressure and the nozzle diameter on the peak pulse pressure and the peak pulse pressure arrival time. When the target value of 9KPa was set up for the peak pulse pressures of the upper, middle and lower filter element and the corresponding target value of 25 ms, 26 ms and 26 ms was set up for the peak pulse pressures arrival time, the optimal combination of the pulse-jet pressure, the nozzle diameter and the pulse-jet distance were P=0.59 MPa, d=8mm, X=66mm.