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Steam generator

A technology for steam generators and evaporator tubes, applied in steam generation, steam boilers, steam boiler accessories, etc., which can solve problems such as lack of installation space, costly modification, and increased total cost of steam generators

Inactive Publication Date: 2017-12-01
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] A disadvantage of this method is that the catalytic plant requires additional installation space and complex mounting structures, so that the overall outlay for erecting and installing the steam generator increases
In addition, existing old installations can usually only be retrofitted at relatively high cost due to the lack of installation space

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] figure 1 A side view of the steam generator 1 as a power plant sub-plant 3, currently a part of a steam turbine, is schematically shown. A gas turbine 5 is connected upstream of the steam generator 1. The exhaust gas 7 flows from the gas turbine 5 to the steam generator 1. The exhaust gas 7 flows through the steam generator 3 in the exhaust gas channel 9 toward the chimney formed as an exhaust device or a vertical flue 11, which is also referred to as a horizontal flue due to the current design. Here, the exhaust gas 7 outputs most of the heat contained therein through heat transfer to the heat exchange surface 13 arranged in the exhaust gas channel 9 through the evaporator tube 17 arranged in the steam generator 3 The surface 15 is formed.

[0039] Thus, the fluid medium 19 flowing into the evaporator tube 17 is heated and evaporated. The exhaust gas 7, which is as cool as possible after its heat output to the flow medium 19 is currently water, leaves the steam generat...

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PUM

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Abstract

The invention relates to a steam generator (1) for a power plant sub-system (3), comprising at least one evaporator tube (17) through which a flow medium can flow, as well as a number of heat exchanger surfaces (13) formed by the surface (15) of the evaporator tube (17), wherein at least parts of the / each heat exchanger surface (13) are provided with a catalytically active coating (25) for the exothermic decomposition of hydrocarbons. By means of the catalytic coating of the heat exchanger surfaces of the evaporator tubes, an increased heat requirement calculation can be carried out in a simple and effective manner, without also having to accept the formation of unwanted harmful substances inside the steam generator. The invention also relates to methods for operating a steam generator (1) of a power plant sub-system (3).

Description

Technical field [0001] The invention relates to a steam generator for a sub-facility of a power plant. In addition, the present invention relates to a method for operating a steam generator of a power plant sub-plant. Background technique [0002] In a power plant sub-facility with a steam generator, the hot gas generated on the burner side during the burning of fossil fuels or the hot exhaust gas flowing from the gas turbine is used to evaporate the flowing medium in the steam generator. [0003] In order to evaporate the flowing medium, the steam generator, also called a waste heat boiler, usually has an evaporator tube that is assembled or gathered into a heat exchange surface, and the heating of the evaporator tube causes the evaporation of the flowing medium guided into the evaporator tube. The steam generated by the steam generator during evaporation is used, for example, for connecting external processes or especially for driving steam turbines, for example in gas and steam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B37/04F22B37/00
CPCF22B37/008F22B37/04Y02E20/12Y02E20/14Y02P80/15B01D53/8637B01D53/944B01D2255/10B01J23/38F23G7/07
Inventor 凯文·布雷希特尔卡特林·拉克亨宁·施拉姆
Owner SIEMENS AG