Warming method and warming system of steam turbine

Abstract

The invention provides a warming method and a warming system of a steam turbine. The warming method comprises the following steps of adjusting a steam exhaust valve of the steam turbine to enable thesteam exhaust pressure of the steam turbine to reach a first pressure value; and adjusting a steam inlet valve of the steam turbine to enable the steam inlet pressure of the steam turbine to reach a second pressure value, wherein the ratio of the second pressure value to the first pressure value is greater than a threshold value. The warming method of the steam turbine can increase the warming speed of the steam turbine.

Description

technical field [0001] The invention relates to the technical field of steam turbines, in particular to a warm-up method and a warm-up system for a steam turbine. Background technique [0002] In the energy market, back-pressure steam turbines for industrial heating and steam-extraction back-pressure steam turbines with cogeneration benefits are widely used. Thermal power plants equipped with such units usually provide steam to the back-pressure steam turbine through the main pipe for the pursuit of economy and operational flexibility. Part of the internal energy of the steam entering the steam turbine is converted into rotational mechanical energy by the steam turbine, and drives the generator to generate electricity; part of it is extracted from the flow stage or exhausted directly into the heating header, and the heating header is responsible for supplying heat to each terminal. User heating task. [0003] The use of the main pipe steam supply system leads to the fact t...

AI Technical Summary

Problems solved by technology

Due to the huge difference between the temperature of the steam and the metal, a relatively strong thermal shock and thermal stress peak will be generated in the component structure when the start-up is started, which will cause significant thermal stress and low-cycle fatigue life damage

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