Thermal power plant closed water system cleaning and film forming system and operation method

Abstract

The invention discloses a thermal power plant closed water system cleaning and film forming system and an operation method. The system comprises a high-level expansion water tank, a closed water pump,a heat exchanger and a plurality of closed water users, wherein the high-level expansion water tank is connected with an inlet of the heat exchanger through a pipeline, and the closed water pump is arranged on the portion, between the high-level expansion water tank and the heat exchanger, of the pipeline; an outlet of the heat exchanger is connected with a water outlet pipeline, and a water return pipeline is connected between the high-level expansion water tank and the closed water pump; and the plurality of closed water users are arranged between the water outlet pipeline and the water return pipeline, a water return port of each closed water user is connected with the water return pipeline, and a water inlet of each closed water user is connected with the water outlet pipeline. According to the system, organic phosphonic acid is adopted as a cleaning agent, and an IS-129 corrosion inhibitor is adopted to prevent the cleaning agent from corroding a metal material, so that the safety of a cleaning process is greatly improved, and leakage and other accidents caused by corrosion of equipment by acidic chemical liquid are avoided.

Description

technical field [0001] The invention belongs to the technical field of cleaning a closed water system of a thermal power plant, and in particular relates to a cleaning and film-forming system and an operation method of a closed water system of a thermal power plant. Background technique [0002] The closed cooling water system of thermal power plants is a closed circulation loop with desalinated water as the medium, which is widely used as the cooling medium in the production of power plants. Its main function is to provide cooling water for the auxiliary equipment on the turbine side and boiler side of the unit, so that the process equipment has the temperature conditions for normal operation. Such as: steam turbine lubricating oil cooler, steam feed water pump oil cooler, anti-fuel oil cooler, generator hydrogen cooler, generator exciter cooler, generator stator cooler, sampling cooler, fan oil station cooling water, Air compressor cooling water, etc. [0003] Closed coo...

AI Technical Summary

Problems solved by technology

The method of dismantling the off-line high-pressure water gun and washing not only affects the safe operation of the unit, but also it is difficult to achieve the effect of eradication only by physical cleaning.

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