Rapid steam purging method and device for steam turbine intake pipe

Abstract

The invention provides a rapid steam blowing method for a gas inlet pipeline of a turbine. The rapid steam blowing method for the gas inlet pipeline of the turbine comprises the following steps that (1) a last section of gas inlet pipeline close to an entrance part of the turbine is cut and taken to be remanufactured into a blowing process pipe, the blowing process pipe is a right-angle bend pipe which is bent by 90 degrees, flanges are fixedly arranged at the two ends of the blowing process pipe, the butt-joint flange is fixedly arranged at one end of the blowing process pipe and is connected with a flange at the tail end of the gas inlet pipeline of the turbine, and the exit flange is fixedly arranged at the other end of the blowing process pipe and is connected with the turbine; (2) the position of the blowing process pipe is upwardly rotated by 90 degrees, and the blowing process pipe is installed in a state with the exit flange vertically upward; (3) a target plate serves as a steam blowing detecting plate and is installed on the exit flange of the blowing process pipe; (4) steam is injected into the gas inlet pipeline for blowing; (5) the steam blowing detecting plate is disassembled after each time of blowing and a blowing result is detected until a detecting result meets the requirement; and (6) after blowing for all is finished, the connecting direction of the blowing process pipe is changed and the blowing process pipe is re-connected with the turbine. The rapid steam blowing method for the gas inlet pipeline of the turbine has the advantages that steam blowing is rapid and convenient, working efficiency is high, and cost is low.

Description

technical field [0001] The invention relates to a manufacturing process of a steam turbine, in particular to a rapid steam purging method and device for a steam turbine intake pipe, and belongs to the technical field of power equipment manufacturing. Background technique [0002] During the normal operation of the steam turbine, there must be high-temperature and high-pressure steam input, and the boiler system that provides high-temperature and high-pressure steam must rely on the steam pipeline connected between it and the steam turbine for steam delivery. However, during the production, welding and installation of the steam pipeline, not only dirt will enter the pipeline, but also impurities such as metal particles, metal oxides, and welding slag will adhere to the inner wall of the pipeline. Although the quick-closing valve of the steam turbine is equipped with a steam filter, after the steam turbine is put into operation, solid impurities whose size is smaller than the ...

AI Technical Summary

Problems solved by technology

This traditional method is very inconvenient because it involves the disassembly and assembly of multiple pipes; in addition, in order to check and judge whether the purging effect is good, a steam purging detection component needs to be installed at the outlet of the steam purging process pipe

The traditional steam purging detection component is composed of a fixed bracket with a flange, a target plate and a bracket, etc. The structure is relatively complex and the production cost is high. At the same time, due to its specific structure and installation method, in the actual use process, the steam The disassembly and assembly of purge detection components is cumbersome

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