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A kind of high temperature steam corrosion inhibitor and application method thereof

A high-temperature steam and corrosion inhibitor technology, which is used in the field of supercritical or ultra-supercritical operating boilers and high-temperature steam corrosion inhibitors, can solve problems such as steam turbine damage, solid particle erosion, boiler tube burst, etc.

Active Publication Date: 2018-10-26
张啸
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0033] 2.1 Affecting unit efficiency
[0037] 2.2 Causing boiler tube burst, unit non-stop and solid particle erosion
[0038] 2.2.1 Boiler tube burst
[0048] Damage to steam turbines, i.e. Solid Particle Erosion (SPE) problems, affecting efficiency and endangering safety

Method used

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  • A kind of high temperature steam corrosion inhibitor and application method thereof
  • A kind of high temperature steam corrosion inhibitor and application method thereof
  • A kind of high temperature steam corrosion inhibitor and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] For the supercritical unit, its rated power is 660MW.

[0093] During the operation of the unit, DFS (the mass ratio of octadecylamine, hexamethylenetetramine and diethylenetriamine is 1:1:1) is used with a plunger pump (flow rate: 1.5~2.5m 3 / h, head: 2.5 ~ 3.0MPa) can be injected into the water pipe of the deaerator.

[0094] DFS circulates with water vapor, and the path of entering the steam system is as follows:

[0095] Deaerator downpipe→feedwater front pump→feedwater pump→high pressure water supply system→coal economizer→steam water separator (steam drum)→water wall→low temperature section superheater→high temperature section superheater→steam turbine high pressure cylinder→low temperature section reheating Heater → high temperature section reheater.

[0096] Anion determination results are as follows:

[0097] Water Vapor Analysis of No. X Supercritical Boiler in XX Power Plant (unit: μg / kg)

[0098]

Embodiment 2

[0100] For the supercritical unit, its rated power is 660MW.

[0101] During the operation of the unit, use a plunger pump (flow rate: 1.5-2.5m 3 / h, head: 2.5 ~ 3.0MPa) can be injected into the water pipe of the deaerator.

[0102] DFS circulates with water vapor, and the path of entering the steam system is as follows:

[0103] Deaerator downpipe→feedwater front pump→feedwater pump→high pressure water supply system→coal economizer→steam water separator (steam drum)→water wall→low temperature section superheater→high temperature section superheater→steam turbine high pressure cylinder→low temperature section reheating Heater → high temperature section reheater.

[0104] Anion determination results are as follows:

[0105] Water Vapor Analysis of No. X Supercritical Boiler in XX Power Plant (unit: μg / kg)

[0106]

Embodiment 3

[0108] For the supercritical unit, its rated power is 660MW.

[0109] During the operation of the unit, use a plunger pump (flow rate: 1.5 to 2.5 m 3 / h, head: 2.5 ~ 3.0MPa) can be injected into the water pipe of the deaerator.

[0110] DFS circulates with water vapor, and the path of entering the steam system is as follows:

[0111] Deaerator downpipe→feedwater front pump→feedwater pump→high pressure water supply system→coal economizer→steam water separator (steam drum)→water wall→low temperature section superheater→high temperature section superheater→steam turbine high pressure cylinder→low temperature section reheating Heater → high temperature section reheater.

[0112] Anion determination results are as follows:

[0113] Water Vapor Analysis of No. X Supercritical Boiler in XX Power Plant (unit: μg / kg)

[0114]

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Abstract

The invention discloses a high-temperature steam corrosion inhibitor. The high-temperature steam corrosion inhibitor comprises fatty amine and further comprises polyamine. According to the high-temperature steam corrosion inhibitor, the stability at the low temperature (<= 350 DEG C) and the reaction activity and the chemical deoxidization capacity at the high temperature (>= 400 DEG C) of the DFS are found and utilized for the first time, and the generation process of oxide skin is restrained and stopped from the beginning; the ideal operation mode of a supercritical (ultra-supercritical) boiler is achieved.

Description

technical field [0001] The invention belongs to the field of thermal power generation, in particular to supercritical or ultra-supercritical operating boilers, and specifically relates to a high-temperature steam corrosion inhibitor and its application. Background technique [0002] At present, the problem of high-temperature oxide skin is common in ultra (ultra) critical units in my country. The thermal resistance effect of oxide skin can lead to a significant drop in unit efficiency; the peeling of oxide scale can cause boiler tube burst, unit non-stop and solid particle erosion (SPE) of steam turbine. According to statistics: there are nearly 100 super (super) critical boilers in the country every year to block and burst tube accidents, which are seriously harmful and cause huge losses. [0003] The existence of high-temperature scale indicates that the steam system is in an oxidative working condition. The oxidant is oxygen, and the oxygen comes from: (1) the residue aft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/02
CPCC23F11/02
Inventor 张啸王佳张茗皓
Owner 张啸
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