Washing system and washing method for accumulated salt of power station steam turbine

Abstract

The invention discloses a washing system and washing method for accumulated salt of a power station steam turbine. The system comprises an auxiliary steam header or a start boiler steam source which communicates with a parallel connection inlet of temporary steam valves of a high-pressure cylinder and a medium-pressure cylinder through a temporary steam pipe, and a steam inlet which communicates with a buffer tank through an outlet valve of the auxiliary steam header or the start boiler steam source, and the temporary steam pipe, wherein a steam outlet of the buffer tank communicates with theparallel connection inlet of the temporary steam valves of the high-pressure cylinder and the medium-pressure cylinder through a temporary steam inlet valve; a temperature gauge and a pressure gauge are arranged on the temporary steam pipe of the steam outlet of the buffer tank, the temporary steam pipe of the steam outlet of the buffer tank further communicates with a temporary steam exhaust pipe, and a temporary steam exhaust valve is arranged on the temporary steam exhaust pipe; and a desuperheating water inlet of the buffer tank communicates with a desuperheating water pipe, and a desuperheating water valve and a desuperheating water pressure gauge are arranged on the desuperheating water pipe. The invention further discloses a washing method of the system. The system is simple in design, reliable and easy to realize, and solves the problems that salt accumulation of a steam turbine is caused due to leakage of a steam condenser and a unit cannot be loaded, of a coastal power plant.

Description

technical field [0001] The invention belongs to the field of cleaning salt deposits in steam turbines caused by seawater entering the water vapor system of boilers due to leakage of condensers in coastal power plants, and in particular relates to a method for washing salt deposits in steam turbines in power plants. Background technique [0002] Once the condenser of the power plant along the coast leaks, the quality of water vapor will deteriorate, and eventually salt will accumulate in the steam turbine, causing the unit to fail to operate normally. At present, most of the treatment methods for steam turbine salt accumulation at home and abroad are to start the cylinder during the overhaul of the unit. Mainly use artificial high-pressure water washing, sand blasting and manual scrubbing, which are labor-intensive, costly, and have a long construction period, and the treatment of dead corners of steam turbines is not thorough, and are limited by the maintenance plan of the p...

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Problems solved by technology

[0003] In order to solve the problem of salt accumulation in the original cylinder treatment machine turbine, the purpose of this invention is to provide a method for flushing salt accumulation in steam turbines of power stations. Cause salt accumulation in the steam turbine and the unit cannot carry the load

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