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Feed water treatment method of thermal generator set

A thermal power generation unit and feedwater treatment technology, which is applied in the field of electric power and power engineering, can solve the problems of accelerated corrosion of the boiler tube inner wall, blade erosion, oxide layer peeling, plugging and bursting of the water supply system, etc.

Inactive Publication Date: 2012-04-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

With the application of oxygenation treatment in super (super) critical units, it is found that in some power plants, the oxide layer formation rate in the superheater and reheater pipes is too fast, and pipe overheating, oxide layer peeling, plugging and bursting of pipes and blade erosion have occurred. Eclipse and other issues
[0005] Therefore, the feedwater treatment methods in the prior art cannot simultaneously suppress the flow-accelerated corrosion of the feedwater system and reduce the corrosion of the inner wall of the boiler tube

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  • Feed water treatment method of thermal generator set
  • Feed water treatment method of thermal generator set
  • Feed water treatment method of thermal generator set

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Embodiment Construction

[0040] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0041] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0042] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0043] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authoriz...

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Abstract

Belonging to the technical field of electric power and power engineering, the invention discloses a feed water treatment method of a thermal generator set. The method comprises: adding an oxidant before a low-pressure heater or / and a high-pressure heater so as to inhibit flow accelerated corrosion in a feed water system; adding a reducing agent after the high-pressure heater for reacting with theoxidant so as to make the concentration of dissolved oxygen in water within a boiler system lower than a predetermined value, thus eliminating the reinforcing effect of oxygen on boiler pipe metal oxidation rate during oxygenation treatment. The method of the invention can inhibit flow accelerated corrosion in a feed water system and reduce oxygen corrosion on the inner wall of a boiler pipe simultaneously.

Description

technical field [0001] The invention belongs to the technical field of electric power and power engineering, and in particular relates to a method for treating feed water of a thermal power generating set. Background technique [0002] At present, there are two main methods of water treatment for super (super) critical thermal power generating units: full volatile treatment (AVT) and oxygenation treatment (OT). AVT advocates removing oxygen in the system and inhibiting oxygen corrosion, including AVT(R) and AVT(O). OT advocates adding oxygen to the system to form a protective oxide layer. Both of these feedwater treatment methods are implemented for the entire system (including low-pressure heaters, high-pressure heaters, and boiler tube systems). [0003] When the ultra (ultra) critical thermal power generation unit adopts the AVT method, flow accelerated corrosion (FAC) occurs in the feed water system such as the low pressure heater and the high pressure heater, so that ...

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Application Information

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IPC IPC(8): C02F1/70C02F1/72
Inventor 张乃强徐鸿李宝让袁晓娜白杨
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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