Desalted water quality protection device

Abstract

The invention discloses a desalted water quality protection device, which relates to the field of chemicals for power plant. The device comprises an air source pipeline, an air source valve, a nitrogen making machine, an outlet pressure regulating valve, an outlet pipeline, a desalted water tank inlet valve, a water seal, a breathing port cover plate and a desalted water tank, wherein the gas source pipeline is connected with the nitrogen making machine through the air source valve; the outlet pipeline of the nitrogen making machine is connected with the desalted water tank through the outletpressure regulating valve and the desalted water tank inlet valve in sequence; the water seal is positioned at an overflow pipe of the desalted water tank; and the breathing opening cover plate is positioned at the breathing opening of the desalted water tank. Through the implementation of the invention, nitrogen can be introduced to fill the desalted water tank, air is isolated, the oxygen content of desalted water is controlled, and the quality of the desalted water is protected.

Description

Technical field [0001] The invention relates to the field of power plant chemistry, in particular to a demineralized water quality protection device. Background technique [0002] In the operation of the power plant, the quality of the demineralized water stored in the demineralized water tank plays a key role in the quality of the power plant's operating steam and water. It affects the startup and grid connection time of the unit and is very important for the economic operation of the unit. [0003] At present, the common way to protect the water quality of desalinated water is to isolate the air above the water surface through a tank float, thereby reducing the oxygen content in the water and improving the water quality. The advantages of this technology are low cost and low loss. The disadvantage is that the isolation effect of the water tank float is not good, and the air cannot be effectively isolated, which causes the long-term storage of desalinated water to contact the air ...

AI Technical Summary

Problems solved by technology

The advantage of this technology is low cost and low loss. The disadvantage is that the isolation effect of the floating ball in the water tank is not good, and the air cannot be effectively isolated, resulting in long-term storage of desalted water in contact with the air for a long time, and the oxygen content increases.

[0004] For power plants that start and stop frequently, or shut down for a long time, the oxygen content of the desalted water quality will increase, which will affect the quality of soda and water in the power plant, and then affect the start-up time of the unit and increase the operating cost of the unit.

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