Method for operating a steam turbine power plant and also device for generating steam

A technology for steam turbines and power plants, which is used in the field of operating steam turbine power plants and devices for generating steam. It can solve the problems of energy optimization and reduce mechanical losses and investment costs.

Inactive Publication Date: 2010-09-01
RWE POWER AKTIENGESELSCHAFT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regulating the dryer temperature in this way is fairly simple, but not energy-optimized

Method used

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  • Method for operating a steam turbine power plant and also device for generating steam
  • Method for operating a steam turbine power plant and also device for generating steam

Examples

Experimental program
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Effect test

Embodiment Construction

[0024] The power plant process depicted in the figures comprises a steam generator 1 , a first steam turbine 2 and a first generator 3 , which are the main components in a water-steam circuit 4 .

[0025] The steam generator 1 is designed, for example, as a powder-fired boiler in which lignite is burned as fuel. The lignite is pre-dried in a drier denoted 5. The dryer 5 is designed in a known manner as a fluidized bed dryer, in which the fluidized coal is heated directly via the heat exchanger 6 . For example lignite with a moisture content or water content of 60% by weight is dried in a dryer to a residual humidity of 12% by weight at a temperature of about 110° C. before being fed to the steam generator 1 for combustion. The energy required for this is mainly in the form of extracted steam from the first steam turbine 2 of the power plant into the dryer 5 . Hot steam at 6 bar flows from the low-pressure part of the first steam turbine 2 through the heat exchanger 6 of the ...

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PUM

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Abstract

Disclosed is a method for operating a steam turbine power plant, encompassing at least one steam generator (1) that is heated using a solid granular combustible, e.g. lignite. In said method, the combustible is first indirectly dried in a fluidized bed drier (5) that is heated at least in part by steam from the water-steam circuit of the steam generator (1). Said method is characterized in that the temperature in the drier (5) is regulated in two stages in accordance with the humidity of the combustible; first, the temperature of the fluidized bed drier (5) is regulated using the pressure of the heating steam, downstream of which the superheating temperature of the heating steam is regulated in accordance with the steam pressure.

Description

technical field [0001] The invention relates to a method for operating a steam turbine power plant comprising at least one steam generator burning a fuel in solid granular form, wherein the combustion is first carried out indirect drying in a fluidized bed type dryer and the fluidized bed type The dryer is at least partially heated with steam from the water-steam circuit of the steam generator. [0002] In addition the invention relates to a device for generating steam comprising at least one drier for drying lignite containing mine moisture, at least one steam generator for burning lignite and at least one steam generator with power generation device arranged downstream of the steam generator The steam turbine of the machine, wherein the dryer has at least one heat exchanger loaded with hot steam, which is connected to the water-steam circuit of the steam generator. Background technique [0003] A method and a device for generating process steam for driving a steam turbine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K17/06F22B35/00F22G5/12F26B3/00F26B3/10
CPCF22G5/123F22B35/00F26B3/08F26B25/22F01K17/06Y02P80/15
Inventor D·布洛克H-J·克卢茨
Owner RWE POWER AKTIENGESELSCHAFT
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