Plate air preheater uses corrugated plates as heat transfer elements to replace traditional tubes and heat pipes. In the plate air preheater, flue gas and air exchange heat through the plates, and hot and cold fluids are completely isolated. The heat transfer elements of plate air preheater generally use 0.6-0.8mm stainless steel thin plates, which are mechanically pressed and molded. According to the characteristics of temperature and volume changes before and after air heating and flue gas cooling, the plate air preheater adopts a pure countercurrent plate design with unequal flow channels, which has excellent hydrodynamic properties-reduced pressure and high heat transfer efficiency.

Compared with heat pipe air preheater, plate air preheater has basically the same one-time investment in equipment; saves more than 48% of the floor area; saves more than 66% of steel; saves more than 50% of the total equipment cost during the equipment life; Temperature resistance increased from 300 ° C to 750 ° C; Recovery of more heat: Increase investment, use some high-quality materials in stages, such as titanium, 276, etc., and the flue gas temperature can be cooled to 80 ° C.