Stable control device of thermal parameters of secondary side of compact steam generator

Abstract

The invention discloses a stable control device of thermal parameters of the secondary side of a compact steam generator. The stable control device comprises a water storage tank, wherein the water storage tank passes through a high-speed centrifugal pump, a vertical preheater and a regulating pipeline in sequence through pipelines and then enters a water supply inlet of the secondary side of the steam generator, and a steam outlet of the secondary side of the steam generator passes through a condenser through a pipeline and then returns to the water storage tank. According to the stable control device, a large-flow adjustment branch and a small-flow adjustment branch are arranged on an output pipeline of the high-speed centrifugal pump, pneumatic switching valves are controlled to select according to the range of flow during actual operation, and multistage throttle hole plates are respectively arranged on each branch, so that the pressure difference of steam between an outlet of the centrifugal pump and the outlet of the secondary side of the compact steam generator is increased and is at least greater than 0.4 MPa, the phenomenon of flow instability of the secondary side of the compact steam generator is avoided, and the stable control over the water supply flow of the secondary side is realized.

Description

technical field [0001] The invention relates to the field of accurate and stable control of feedwater flow rate, feedwater temperature and steam pressure on the secondary side of a compact steam generator, and specifically relates to a thermal parameter stabilization control device on the secondary side of a compact steam generator. Background technique [0002] Compact steam generators have been widely used in nuclear power plants and other industrial fields. Compared with the traditional saturated natural circulation steam generator, it has the advantages of compact structure, high efficiency, and fast response to load tracking. However, under external disturbances, the pressure of superheated steam changes rapidly. If the feed water flow cannot quickly track the change of load, the steam quality will not be able to Meet the design requirements. At the same time, the heat storage capacity of the reactor coolant is large. When the working conditions change rapidly, if the ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a thermal parameter stabilization control device for the secondary side of a compact steam generator, which solves the problems of inaccurate parameter control and a small control range in the control device in the prior art, and ensures that the secondary side of the compact steam generator Accurate and stable control of secondary feedwater flow, feedwater temperature, and steam pressure to avoid flow instability

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