The supporting structure is composed of beams and grids. Its main features are: the comprehensive opening rate can reach more than 55%, can adapt to the high gas velocity requirements of 1.5 ~ 2m/s, the product is easy to manufacture, and the cost is low. For the transformation of the old factory, it can meet the design requirements. It is very easy to repair and replace the supporting structure. Our company can produce various beams with AL2O3 content ≤ 75%, width ≥ 40, height ≤ 260, and length ≤ 2500; it can produce various grids with width and length ≤ 220 and height according to user requirements.