Boiler flushing system for 660mw supercritical unit without boiler water circulation pump

Abstract

The invention discloses a 660 MW supercritical unit no-furnace water circulation pump boiler pipe flushing system, and belongs to the technical field of boiler pipe flushing. Sundries clearing can becarried out on a part of a steam conveying pipeline close to a boiler without stopping steam supply of the steam conveying pipeline to a steam turbine. The system comprises a boiler, a steam inlet pipe, a main pipe, a steam outlet pipe, a side pipe, a dirt removal pipe and a dirt cleaner, wherein a left pipe opening of the main pipe comprises an upper left pipe opening and a lower left pipe opening which are arranged in a forked manner; a right pipe opening of the main pipe comprises an upper right pipe opening and a lower right pipe opening which are arranged in a forked manner; the left endof the side pipe is bent downwards and rightwards in an arc-shaped manner to form a left bending section pipe of the side pipe; the right end of the side pipe is bent downwards and leftwards in an arc-shaped manner to form a right bent section pipe of the side pipe; one end of the steam inlet pipe is in butt joint connection with the lower left pipe opening of the main pipe; and the other end of the steam inlet pipe is in butt joint connection with a steam outlet of the boiler.

Description

technical field [0001] The invention relates to the technical field of boiler flushing, in particular to a boiler flushing system for a 660MW supercritical unit without a boiler water circulation pump. Background technique [0002] When the boiler is used for a long time, a large amount of steam scale, iron filings and rust will be deposited on the inner wall of the boiler. When the debris in the boiler accumulates to a certain amount, some of the debris will fall off. When the debris is large, the debris will block the steam delivery pipeline and cause the pipe to overheat and explode, or the debris will hit the steam turbine blade with the high-speed steam flow and cause the blade to break, resulting in a major accident. The steam delivery pipeline that is most likely to be blocked by debris from the boiler is the steam delivery pipeline closest to the boiler. As long as the debris is often removed from the steam delivery pipeline closest to the boiler, the steam delivery ...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that when removing debris from a section of steam delivery pipeline close to the boiler, it is necessary to stop the steam delivery pipeline from supplying steam to the steam turbine, thus causing the shutdown of the steam turbine, and to provide a steam boiler that does not need to stop the steam The steam supply pipeline to the steam turbine can realize the removal of debris in a section of the steam pipeline close to the boiler, which has high safety and good reliability. The 660MW supercritical unit has no boiler water circulation pump boiler flushing system

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