COMB TOOTH TYPE WATER-COOLED COLUMN AND FURNACE HAVING SAME

摘要

The water cooling column 4 in the furnace of the circulating fluidized bed boiler is formed by being surrounded by a membrane water cooling wall 41. The water cooling pillar 4 includes a lower portion A, an upper portion, and a transient portion. The lower portion (A) is a single columnar body, and an inner secondary windshield (400) is formed on the side wall of the lower portion (A). The upper part includes a plurality of sub-pillars (B, C). The membrane water cooling wall 41 of the lower portion A extends to the upper portion via a transient portion. Intermediate sub-pillars (B, C), the corresponding membrane water-cooling wall 41 of the membrane water-cooling wall 41 of the lower end portion (A) is formed to extend upward and is surrounded by the above-described membrane water-cooling wall 41, Also, the plurality of sub-pillars (B, C) are separated from each other.