基于FLUENT数值模拟的袋式除尘器喷管最佳喷吹高度研究

摘要

With wall peak pressure of filter bags as evaluation standard,the best blowing height of nozzle in bag filter was analyzed by using FLUENT numerical simulation.Results showed that for short bag(3 m),the best blowing height would be 200 mm when jetting pressure was 0.3 MPa with Type 2 nozzle or jetting pressure was 0.4 MPa with Type 1 nozzle.For long bag(5 m),the best blowing height would be 250 mm when jetting pressure was 0.4 MPa with Type 2 nozzle or jetting pressure was 0.3 MPa with Type 3 nozzle.Entity test showed that the relative errors were all smaller than 2% between measured values and simulated values,indicating that the simulation succeeded.%以滤袋壁面峰值压力作为评价滤袋清灰强度的标准,采用 FLUENT 软件数值模拟优化袋式除尘器喷管的最佳喷吹高度.结果表明:对于长度为3 m 的短滤袋,在喷吹压力和喷管类型为(0.3 M Pa,2型)和(0.4 M Pa,1型)时,最佳喷吹高度为200 m m;对于长度为5 m 的长滤袋,在喷吹压力和喷管类型为(0.4 M Pa,2型)和(0.3 M Pa,3型)时,最佳喷吹高度为250 m m;实物测试系统实验验证表明,实际测量的压力和模拟得到的压力之间的相对误差均小于2%,模拟成功.