Operation process of the steam drum

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(1) The steam-water mixture coming from the boiler enters the drum through the rising tubes at the top of the drum, and flows down along the narrow annular channel formed by the inner wall of the drum and the arc-shaped lining. This allows the steam-water mixture to transfer heat to the inner wall of the drum at a uniform rate and at an appropriate flow velocity, thereby overcoming the problem of excessive temperature differences between the upper and lower walls of the drum during boiler startup and shutdown, and enabling faster startup. (2) The steam-water mixture entering the drum goes into steam-water cyclone separators, where inertial separation is achieved by utilizing the inertia resulting from the change in flow direction; this represents the first stage of separation of the steam-water mixture. (3) The vapor that has been separated still contains a considerable amount of moisture. It enters the corrugated plate separator from the top of the separator; this separator is installed at the top of the cyclone separator. The vapor containing some water droplets flows through the gaps between the corrugated plates, and the moisture adheres to the metal walls, forming a water film that flows downward. (4) The steam after the second separation is finally subjected to steam cleaning, where gravity separation is utilized based on the difference in water density; this constitutes the third separation. (5) After three stages of separation, the steam meets the quality standards required, and then it is directed from the saturated steam pipe at the top of the steam drum to the screen superheater.