Who knows what these structures inside the steam drum are and what their functions are?
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What is the purpose of the partition in the middle and the areas marked in red?
http://img.mp.itc.cn/upload/20170413/7630f87f188f402b8e84f90bb0594b73_th.jpeg http://5b0988e595225.cdn.sohucs.com/images/20180616/c56cc1727c0d42af82582a329212035a.jpeg Based on the images and your photos, it seems to be a separation device for the steam-water mixture coming from the rising pipe.
It should be the baffle at the convection tubes of the upper header tube bank; you can check by looking at the external tube bank of the steam drum to find out
The power plant’s steam drum, right? A normal steam drum consists of a section of pipe + 2 end caps.