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Vapour Turbine

A technology of steam turbines and turbines, which is applied to gas turbine devices, mechanical equipment, engine components, etc., and can solve problems such as increased maintenance costs, reduced useful work of turbines, and increased complexity

Inactive Publication Date: 2012-06-27
NUOVO PIGNONE SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The first disadvantage is that cleaning operations with geothermal steam lead to increased operating and maintenance costs and complexity of the plant
[0013] Another disadvantage is that when the steam is purged, the enthalpy available at the turbine inlet is reduced, thus reducing the useful work of the turbine itself

Method used

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Embodiment Construction

[0019] The features and advantages of a steam turbine operated with geothermal steam will become more apparent from the following exemplary and non-limiting description of the invention.

[0020] According to the present invention there is provided a steam turbine which is operated with geothermal steam containing aggressive or corrosive agents, in particular such as chlorides and / or sulphides.

[0021] A steam turbine comprising a series of stator blades made of a nickel alloy containing nickel in an amount ranging from 54% to 58% by weight to avoid washing of said geothermal steam while maintaining said series of stator blades and said steam turbine high service life.

[0022] Advantageously, larger amounts of energy can be converted by means of the turbine, since unwashed geothermal steam has a higher enthalpy than cleaned geothermal steam.

[0023] Advantageously, said turbine is particularly effective for geothermal steam containing chlorides in an amount higher than 2 p...

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PUM

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Abstract

Te invention provides a vapour turbine operating with geothermal vapours containing corrosive agents. The turbine comprises a series of stator blades made of a nickel-chromium-molybdenum alloy containing a quantity of nickel ranging from 54% to 58% by weight, a quantity of chromium ranging from 21% to 23% by weight and a quantity of molybdenum ranging from 12% to 14.5% by weight; the turbine also comprises a series of rotator blades made of a nickel-alloy-molybdenum-niobium alloy which contains a quantity of nickel ranging from 55% to 59% by weight, a quantity of chromium ranging from 19% to 22.5% by weight, a quantity of molybdenum ranging from 7.0% to 9.5% by weight and a quantity of niobium ranging from 2.75% to 4% by weight. The vapour turbine can avoid the washing of the geothermal vapours and maintain a high useful life of the vapour turbine.

Description

[0001] This application is a divisional application of the patent application submitted on December 23, 2005 (the application number is 200510135847.1, the invention name is "steam turbine"). technical field [0002] The present invention relates to steam turbines which can be used to obtain energy from geothermal steam. Background technique [0003] Steam turbines operating with geothermal steam come into contact with substances that are aggressive and / or corrosive to the components of the turbine itself. [0004] Even small amounts of aggressive substances such as chlorides and sulfides can cause corrosion of steam turbine components such as rotor blades, stator blades and seals. [0005] The materials currently used for steam turbine components are martensitic stainless steels, which are strongly subjected to corrosion phenomena with regard to aggressive and / or corrosive agents. [0006] Corrosion is particularly high in the transition zone (dew point) between superheate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D9/02C22C19/05F01D5/28
CPCF02C1/05F05C2201/0466C22C19/056F05C2201/0409F01D5/28F01D11/12C22C19/055F02C1/00F05D2300/131Y10T428/12847Y10T428/12944
Inventor C·科尔特斯P·本迪内利V·韦基亚里诺M·P·阿莫罗索
Owner NUOVO PIGNONE SPA
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