多室バク・フィルターの圧損制御方式の検討

抄録

There are three methods to control pressure loss across a fabric filter, i.e., timer type, one point pressure switch type and two points pressure switch type.
It is well known that the outlet dust concentration of a fabric filter increases remakably just after the cleaning operation.
Therefore in this paper, the number of cleaning cycles per unit time for each method by using a mathematical model are calculated. A first order lag model can be applied to express the dynamic characteristics between pressure loss amplitude of a timer type and frequency of inlet dust concentration. In the timer type, the number of cleaning cycles per unit time depends on the period and the amplitude of inlet dust concentration, and increases rapidly beyond a specified cyclic period of inlet dust concentration. On the other hand, in a pressure switch type the number of cleaning cycles is almost independent of its inlet variables and constant. Therefore, a pressure switch type is preferable to have an advantage over a timer type for long cyclic period of inlet dust concentration.