Beside the steam & condensate system, without a well designed blowing air system the paper machine efficiency will be limited in quantity and in quality. With the AESA blowing boxes and ventilation systems, the optimisations are :
AESA design and manufacture hoods for the paper machine with insulation and easy access feature so to avoid condensation and have easy maintenance.
A proper hood design has five main purposes :
Heat recovery systems
In the ventilation process, fresh air is taken from outside. This air needs to be heated to the right condition so to have an efficient drying of the paper sheet. Via Heat Plates Exchanger (HPE) and Steam Heat Exchanger on the incoming fresh air stream, we can minimize the heating requirement and reuse available heat of the blow through and flash steam as well as the heat of the exhaust air
The advantages are as follows :
For the process where the exhaust air contains dust or fluff, the HPE is provided with a water spray cleaning system. This cleaning system maintain the efficiency of the heat exchanger and reduces the fire hazard. It can be used as a fire fighting device. Waste water is to be collected separately.