Generator set three-stage parallel serial connection bypass system and adjusting method thereof

Abstract

The invention discloses a generator set three-stage parallel serial connection bypass system and an adjusting method thereof. The system comprises a high-pressure bypass system, a low-pressure bypasssystem and a low-low-pressure bypass system; the high-pressure bypass system comprises a high-pressure bypass filter, a high-pressure bypass valve and a high-pressure bypass isolation valve, the low-pressure bypass system comprises a low-pressure bypass filter, a low-pressure bypass valve and a low-pressure bypass isolation valve which are sequentially connected between a reheating steam heat segment pipeline and a condener, the low-low-pressure bypass system comprises a low-pressure cylinder isolation valve and a medium-pressure exhaust low-pressure bypass communication valve, the low-pressure cylinder isolation valve is arranged on an air guide pipe between a medium pressure cylinder and a low-pressure cylinder, an inlet pipeline of the medium-pressure exhaust low-pressure bypass communication valve is arranged on a medium-pressure cylinder exhaust pipeline, an outlet pipeline is arranged on a pipeline between the low-pressure bypass valve and the low-pressure bypass isolation valve,the high-pressure bypass system and the low-pressure bypass system are connected through a high and low pressure bypass communication valve, and a pipeline between the low-pressure bypass valve and the isolation valve is connected with a heat net heater through a low-pressure bypass heat supply adjusting valve.

Description

technical field [0001] The invention belongs to the technical field of steam turbine power generation and heat supply, and in particular relates to a three-stage hybrid bypass system of a generator set and an adjustment method thereof. Background technique [0002] During the start-up process, shutdown process, and adjustment process of the boiler operating conditions when the steam turbine fails, the operating conditions between the boiler and the steam turbine must be well coordinated. The bypass system of the generator set is an important component system of the thermal system of the steam intermediate reheating unit unit. It is a steam passage system parallel to the steam passage of the steam turbine. soundproofing facilities. The new steam from the boiler bypasses the high-pressure cylinder of the steam turbine, which is called a high-pressure bypass; the reheated steam bypasses the medium and low-pressure cylinders of the steam turbine, which is called a low-pressure ...

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Problems solved by technology

The peak-shaving capacity of power grids in some areas is seriously insufficient, especially during the winter heating period in northern China, which further exacerbates the contradiction of non-fossil energy consumption

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