The furnace is fully welded membrane water-cooled and made by the tube and membrane bar. Both smooth and ribbed tube are all used, which are made in SA- 210C with Φ60×6.5, and the membrane bar is 6×15, of A36 material. The furnace tubes space is 75mm, the upper furnace depth is 9,900mm, the lower furnace depth is 17,100mm, the furnace width is 32,100mm and the height is 53,650mm (from the lower header to the roof). In order to increase the reliability of water circulation, ribbed tube is adapted for the high heat duty area of the furnace. In the meanwhile, to improve the high temperature gas fullness in the furnace, the arch is formed by the rear water wall at the furnace exit, which will be extended to the 1/3 depth of the furnace. The arch is supported by the hangers and trusses, which upper part of the rear waterwall (10HAD30BG003) will be separated into two parts, one (10HAD30BG001) turns upward and is connected to the upper header of the front screen panel of rear wall (10HAD30AC001, 002);
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