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

A steam turbine and impulsive technology, applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve the problems of uneconomical economy, high cost, complex structure, etc., achieve the effect of small pipeline, low cost, and widen the parameter range

Active Publication Date: 2007-05-02
BEIJING CENTURY BENEFITS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is equivalent to two steam turbines connected in series, which has a complex structure and high cost
This costly measure is only worthwhile for high-parameter, high-power turbogenerators
It will not be economical to use the above method for small and medium-sized steam turbines with a power below 25MW or steam turbines for industrial waste heat power generation

Method used

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

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Embodiment Construction

[0023] The thermal system diagram of the embodiment of the present invention as shown in Fig. 1 (in the figure we only show one stage of internal reheating, in fact two or even multiple stages of internal reheating can be set as required). A reheat steam pipe 3 with a small diameter (such as DN80mm) is connected to the main steam pipeline 2 behind the main steam valve 1, and this pipe supplies 3% to 8% of the total steam to the interstage located in the steam turbine cylinder Steam reheater4. After the steam releases heat in the reheater 4, the saturated condensed water is controlled by the steam trap 7 and enters the hydrophobic expansion tank 8, where the condensed water depressurizes and flashes out part of the steam to enter the steam turbine 5 to expand and work through the steam pipe 9. The low-pressure saturated water in the hydrophobic expansion tank 8 is discharged to the condenser 11 through the pipe 10 to mix with the condensed water of the mainstream working steam,...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D25/00F01D25/10F01D25/32
Inventor 陈恩鉴
Owner BEIJING CENTURY BENEFITS
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