The vertical heating boiler is composed of a plurality of vertically arranged pipe screens, and the working fluid flows from the bottom to the top, and is arranged outside the furnace.
In 1922 he published a patent on a DC boiler that took advantage of the fact that the water became directly dry when the critical pressure was exceeded, so that the two-phase state at the time of evaporation could be eliminated and that no longer needed
Czech engineer Muller, in the First World War, in the United Kingdom named Mark Bensheng.
The advantage is high installation cost, easy to manufacture, especially for large-capacity boilers.
Its shortcomings for the sliding operation of the poor adaptability, metal consumption larger.