Nitrogen pressure stabilizing system for high-temperature high-pressure hot water loop

Abstract

The invention discloses a nitrogen pressure stabilizing system for a high-temperature high-pressure hot water system. The system comprises a liquid nitrogen gas making device, a nitrogen mother pipe and pressure stabilizers, wherein the gas outlet end of the liquid nitrogen gas making device communicates with the nitrogen mother pipe; the nitrogen mother pipe communicates with a plurality of nitrogen supplementing branches; each nitrogen supplementing branch is provided with one pressure stabilizer, and the outlet of each nitrogen supplementing branch communicates with gas space on the upper portion in the corresponding pressure stabilizer; the liquid part at the lower part of each pressure stabilizer communicates with the high-temperature high-pressure hot water loop system through a fluctuation pipe; and the gas part of each pressure stabilizer communicates with a discharge pipeline. The system has the beneficial effects that: according to the pressure stabilizing system, liquid nitrogen gasification is adopted as a pressure stabilizing gas source, so that more gas is stored per unit volume, frequent replacement of gas cylinders is avoided, the nitrogen production cost is reduced, the nitrogen supply is guaranteed, the control is simple, the response is fast, the pressure fluctuation and control requirements in the operation process of each operation working condition of thehot water loop system can be fully met, and the scaling and corrosion risks caused by gas dissolving in water are reduced.

Description

technical field [0001] The invention relates to the technical field of steam power, in particular to a nitrogen pressure stabilizing system for a high-temperature and high-pressure hot water loop. Background technique [0002] During the operation of the hot water loop, due to temperature changes, water volume fluctuations will cause pressure changes. In order to ensure the operation of the system, a corresponding voltage stabilization system must be installed. At present, the commonly used voltage stabilizer methods include electric heating type voltage stabilizer and gas tank type voltage stabilizer. [0003] Electric heating type voltage stabilizers are widely used in the primary loop system of nuclear power plant reactors, and saturated steam is used to stabilize the pressure. The interior of the pressurizer is divided into an upper steam space and a lower water space, and the working fluids are saturated steam and saturated water respectively, which are in a two-phase ...

AI Technical Summary

Problems solved by technology

The pressure adjustment process of the gas tank type regulator is fast, the structure is simple, the maintenance and management are convenient, and the pressure control is simple; Limited vial storage and difficult and costly preparation

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