A control method for slowing down the formation and shedding of oxide scales in the heating pipes of power plant units

A power station unit and control method technology, applied to the components of steam boilers, steam generation, lighting and heating equipment, etc., can solve problems such as blockage and bursting of tubes, oxide skin shedding, etc., to avoid overheating, promote cooling work, The effect of improving accuracy

Active Publication Date: 2022-04-01
HUANENG CHAOHU POWER GENERATION
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that in the prior art, when the temperature of the furnace tube changes greatly, it may cause the scale to fall off and block the tube burst.

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  • A control method for slowing down the formation and shedding of oxide scales in the heating pipes of power plant units
  • A control method for slowing down the formation and shedding of oxide scales in the heating pipes of power plant units
  • A control method for slowing down the formation and shedding of oxide scales in the heating pipes of power plant units

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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0031] refer to Figure 1-5 , a control method for slowing down the formation and shedding of oxide scales in the heating pipes of power plant units, the steps of which are as follows;

[0032] S1: Start the boiler, heat the boiler, and start the unit at the same time during the process from the cold state to the warm state to the hot state of the boiler. During the operation of the unit, the inside of the unit will change from a warm state to a wet state to a dry state; in S1 , will first add water source in the boiler, the quality standard of water source is PH value 9.2~9.6, Fe≤50μg / L, SiO2≤30μg / L, conductivity≤0.65μ s / cm, in S1;

[0033] S2: In the process of op...

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Abstract

The invention discloses a control method for slowing down the formation and shedding of oxide scales in the heating tube of a power station unit. S1: start the boiler, heat the boiler, and start the unit at the same time during the process of the boiler from a cold state to a warm state to a hot state. During the process, the inside of the unit will change from a warm state to a wet stage to a dry state. In the present invention, during the process of monitoring the tube wall temperature of the partition screen superheater, panel superheater, high-temperature superheater and high-temperature reheater, the detection of the boiler wall temperature is realized by setting the alarm component The structural design of the component can effectively achieve its monitoring effect. At the same time, when the wall temperature exceeds the threshold value, the adjustment component will be pushed to rotate at this time. During the rotation of the adjustment component, the flow port of the regulating water valve is realized. Enlarging, promoting the counterparts of water flow, promoting its realization of desuperheating work, effectively avoiding the overheating of the pipe wall and the occurrence of pipe bursting.

Description

technical field [0001] The invention relates to the technical field of power station units, in particular to a control method for slowing down the generation and shedding of scales in the heating pipes of the power station unit. Background technique [0002] Boiler partition screen superheater, panel superheater, high-temperature superheater and high-temperature reheater furnace heating surface pipe material is T91, TP347H, SUP304H, HR3C, T122, after long-term operation of the unit, it is not possible to thicken the high-temperature oxide skin on the inner wall of the furnace tube To avoid, if the pipe wall is overheated, the formation of scale will show a tendency to accelerate. Due to the different thermal expansion coefficients of the high-temperature scale and the matrix, when the unit is started and stopped, the temperature of the furnace tube changes greatly, which may cause the scale to fall off and block the burst tube. During the start-up process of the unit, the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B37/06F22B37/47
CPCF22B37/06F22B37/47
Inventor 张建华李小健韩宝庚
Owner HUANENG CHAOHU POWER GENERATION
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