Method for washing oil adjusting system of steam turbine at nuclear power station

Abstract

The invention provides a method for washing an oil adjusting system of a steam turbine at a nuclear power station. The method comprises the following steps: preparation before washing: stopping and isolating the system and device, preparing the tools and materials; installation of washing short circuit device: disassembling the on-site device and installing the washing short circuit device, forming a loop by each oil changing line and oil return line; forward and backward washing: filling the lines with water soluble cleaning agent, respectively performing the circular washing to the loop along the forward direction and the backward direction; replacement washing: performing the circular washing to the loop by using the water and oil respectively. Because the external mass-flow washing short circuit device is used, and each oil charging line and the oil return line of the oil adjusting system of the steam turbine are connected totally to form one loop, the washing effect is obvious specifically, and the washing time is reduced greatly. Otherwise, the water circulation and oil replacement are respectively used for circularly washing the loop after washing, the replacement process is simplified, the cost is saved, and the operation efficiency of the steam turbine set is further improved.

Description

technical field [0001] The invention relates to the key technical field of a mega-kilowatt nuclear power plant, in particular to a flushing method for a regulating oil system of a steam turbine in a nuclear power plant. Background technique [0002] At present, the steam turbine unit of a nuclear power plant includes a steam turbine regulation oil system (GFR), a steam turbine regulation system (GRE) and a steam turbine protection system (GSE). The function of the steam turbine regulation oil system (GFR) is to provide the steam turbine regulation system (GRE) and the steam turbine protection system (GSE) with processed anti-combustion power oil with qualified quality and operating parameters. Specifically, it is to provide phosphate ester anti-fuel oil with a temperature of 43 degrees Celsius, a pressure of 13.8 megabars, and a small flow rate to the operating mechanisms of the high and low pressure cylinder stop valves and regulating valves of the steam turbine. [0003] ...

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to overcome the defects of the prior art and provide a flushing method for the regulating oil system of a steam turbine in a nuclear power plant, aiming at solving the defects of poor flushing effect, long flushing time and high cost of the regulating oil system in the prior art

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