Method for Calculating Uneven Coefficient of Steam Humidity Load Distribution in Steam-Water Separation Dryer

Abstract

The invention discloses a method for calculating a steam humidity load distribution non-uniformity coefficient of a corrugated plate dryer assembly in a steam-water separation dryer system. The methodcomprises the following steps: introducing computational fluid mechanics software into a grid model of the steam-water separation dryer system as a computational domain; determining the physical properties and boundary conditions of the continuous-phase steam, and calculating the turbulence flow of the continuous-phase steam by applying a Reynolds time-averaging method; iteratively solving a massconservation equation and a momentum conservation equation in each grid unit of the computational domain to obtain a steady-state flow field of the continuous-phase steam; determining a physical property, a boundary condition and a stress model of the discrete phase liquid drop; carrying out single-phase coupling calculation on the discrete-phase liquid drops and the continuous-phase steam on a steady-state flow field of the continuous-phase steam, and solving a position equation and a momentum conservation equation of the discrete-phase liquid drops; and calculating the humidity load non-uniformity coefficient of the continuous phase steam at each corrugated plate dryer unit inlet in the dryer assembly of the steam-water separation dryer system.

Description

technical field [0001] The invention belongs to the technical field of steam generator steam-water separators, and in particular relates to a method for calculating the uneven coefficient of steam humidity load distribution of a steam-water separation dryer. Background technique [0002] As the hub of the primary and secondary circuits of nuclear power plants, the steam quality provided by the steam generator is directly related to the safe operation of the secondary circuits of nuclear power plants. Therefore, the steam-water separation dryer system is an indispensable component in the natural circulation steam generator. There are usually two-stage steam-water separation and drying devices in natural circulation steam generators. The first stage is usually a rotary vane separator assembly. A single rotary vane separator includes four rotary vanes to generate a rotating flow of liquid droplets and steam. The separation mechanism is an inertial separation mechanism that uti...

AI Technical Summary

Problems solved by technology

If the humidity of the steam at the inlet of the corrugated plate dryer unit exceeds the design threshold, the drying performance of the corrugated plate dryer will be greatly reduced

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