In the environmental design of the boiler, it also includes the circulation fluidization system, so as to reduce the pollution to the surrounding environment. Before the design, we should first understand the characteristics of boiler circulation fluidization system, and develop solutions on the basis of not affecting its performance.
In the circulating fluidization system of the boiler, in order to meet the requirements of environmental protection, the circulating fluidized bed selected should have a separator, in some cases will choose two stage separator, but it is easy to cause the resistance of the flue gas of the boiler body is larger than that of other equipment.

In the selection of boiler dust catcher, the concentration and particle characteristics of fly ash should be fully mastered first. Secondly, the characteristic curve of the dust collector should be obtained. But the above two requirements are not fully achieved, so the boiler has not reached the designed dust removal efficiency.
Because the inlet side pipe of induced draft fan is in a state of high negative pressure, the air leakage is serious, so the existing circulating fluidized bed boiler generally exists under the condition of insufficient air, which not only limits the boiler output, but also aggravates the air pollution. How to solve this problem is also the focus of the discussion here.
On the one hand, the flue gas resistance of CFB body should be calculated accurately and carefully designed according to it. On the other hand, the rubber and plastic tube selected in the boiler can reduce the elbow as much as possible to reduce the resistance; There is to choose small resistance dust collector and high efficiency, high pressure head induced draft fan, so that the problem of insufficient boiler air can be overcome naturally.