Multistage impulsion type steam turbine with damp being removed and heat being regained inside machine

Abstract

The invention provides a build-in dehumifying reheating multiple stage turbine. The steam reheater is set between the adjacent grades in the cylinder of the turbine, leads the new steam from the main steam tube behind the main valve of the turbine to the reheater to heat expansion desiccation and steam and falls its humidity to protect the turbine from the water erosion; the outlet of the reheater connects the sparse liquid expansion box through the sparse box valve and the exhausting aperture of the expansion box connects the condensator. The invention can directly desiccate and reheat the steam between the grades.

Description

technical field

[0001] The invention relates to a steam turbine technology working in a wet steam area, especially a steam dehumidification and reheating technology in a steam turbine with a medium and low parameter. Background technique

[0002] A known steam turbine is a device used in thermal power plants to convert the thermal energy of steam into mechanical energy. Multistage impulse steam turbines are usually used in power plants in my country. In a multi-stage steam turbine, the stage is the basic unit of energy conversion. A row of nozzles (or stationary cascade) plus a first-stage impeller blade (or movable cascade) is called a stage of the steam turbine. The steam is decompressed and expanded through the nozzle, and part of its thermal energy is converted into the kinetic energy of the steam flow, and then the high-speed steam jet drives the impeller blades to rotate, converting the kinetic energy of the steam flow into the mechanical energy of the steam turbine ...

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