Steam extraction and heat supply regulation and control method for secondary heating steam turbine generator unit

Abstract

The invention belongs to the technical field of heat supply, power generation and control analysis of heat supply and power generation, and particularly relates to a steam extraction and heat supply regulation and control method for a secondary heating steam turbine generator unit. The heat supply steam flow requirement is met by controlling the steam extraction flow of the secondary heating cold section steam extraction pipe and the steam extraction flow of the secondary heating hot section steam extraction pipe, the steam quantity proportion of the secondary heating cold section steam extraction pipe and the secondary heating hot section steam extraction pipe is adjusted in real time, and the temperature changes correspondingly after different steam extraction quantity proportions of the secondary heating cold section steam extraction pipe and the secondary heating hot section steam extraction pipe are mixed. Heat supply steam of different temperature grades can be met; and the temperature of the heat supply steam is adjusted in combination with the vapor-liquid two-phase heat exchanger, so that the temperature range of the heat supply steam is expanded. And meanwhile, external steam supply can be realized without grid connection of the unit, and thermoelectric decoupling is realized.

Description

technical field [0001] The invention belongs to the technical field of heat supply and power generation and its control analysis, and in particular relates to a steam extraction heat supply control method for a secondary heating turbogenerator set. Background technique [0002] In response to the requirements of the national energy conservation and environmental protection policy, small industrial boilers have been gradually eliminated and replaced by heating transformation of surrounding condensing generator sets, and centralized heat supply to heat-consuming enterprises by extracting steam from the steam system of the generator sets. For the turbogenerator set with secondary heating, because of the high pressure of boiler secondary heating inlet steam and steam outlet (i.e. steam turbine high-pressure cylinder exhaust steam and medium-pressure cylinder inlet steam), it is easy to extract steam through openings on the corresponding steam pipes, which is suitable for long dis...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of excessively high or too low temperature of steam extraction and supply on the steam inlet and outlet pipes of the boiler for secondary heating, the present invention provides a method for regulating the steam extraction and heat supply of a turbogenerator set for secondary heating, and the specific technical scheme is as follows :

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