A steam-water separator component exhaust structure specially used for nuclear power plant steam generators

Abstract

The invention discloses a steam-water separator component exhaust structure specially used for steam generators in nuclear power plants. The steam-water separators are combined to form several concentric ring structures with different diameters, and the adjacent steam-water separation in each ring structure There are exhaust steam passages between the devices, and the exhaust steam passages pass through the upper deck. This invention increases the steam circulation area of ​​the exhaust structure of the steam-water separator under the condition that the diameter of the upper cylinder of the steam generator remains unchanged, saves the space of the upper cylinder of the steam generator, ensures the exhaust capacity of the exhaust structure of the steam-water separator, and satisfies The steam exhaust requirements of small-diameter steam-water separator components create conditions for the application of compact and efficient small-diameter steam-water separators, and avoid the steam in the steam-water mixture from being opposed to the tangential drainage of the steam-water separator, thereby ensuring that the steam-water separator and even the dryer The separation efficiency is high, and dry saturated steam with qualified quality is obtained.

Description

technical field [0001] The invention relates to nuclear power plant steam generator technology, in particular to the application of a compact, high-efficiency and small-diameter steam-water separator, and in particular to a steam-exhaust structure of a steam-water separator assembly specially used in a nuclear power plant steam generator. Background technique [0002] The steam-water separator is located under the dryer and the gravity separation space in the steam generator of the nuclear power plant. Its function is to roughly separate the steam-water mixture, reduce the humidity at the inlet of the dryer, and ensure that the dryer supplies qualified dry saturated steam to the steam turbine, ensuring that the steam turbine safe and economical operation. [0003] The steam-water mixture coming out of the tangential drain (or porous drain) of the steam-water separator is mainly composed of water, but also contains a small amount of steam. Appropriate exhaust structures shoul...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the steam exhaust capacity of the small-diameter steam-water separator assembly cannot meet the requirements due to the limited space on the upper cylinder of the steam generator, and the steam exhaust capacity cannot meet the requirements. The exhaust structure of the steam-water separator assembly of the steam generator, the exhaust structure increases the steam circulation area of ​​the steam-water separator exhaust structure under the condition that the diameter of the upper cylinder of the steam generator remains unchanged, and ensures the exhaust of the steam-water separator exhaust structure. steam capacity to meet the steam exhaust requirements of small-diameter steam-water separator components, avoiding the hedge between steam in the steam-water mixture and the tangential drainage of the steam-water separator, thereby ensuring the separation efficiency of the steam-water separator and the dryer, and obtaining qualified dry saturated steam

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