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High-temperature steam corrosion inhibitor and application method thereof

A high-temperature steam and corrosion inhibitor technology, which is applied in the field of supercritical or ultra-supercritical operating boilers and high-temperature steam corrosion inhibitors, can solve problems such as solid particle erosion, steam turbine damage, and endangering safety, so as to facilitate production maintenance and management , Oxide scale problem no longer worsens, oxidation reaction inhibition and prevention effect

Active Publication Date: 2016-03-23
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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  • High-temperature steam corrosion inhibitor and application method thereof
  • High-temperature steam corrosion inhibitor and application method thereof
  • High-temperature steam corrosion inhibitor and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0093] During the operation of the unit, use a plunger pump for DFS (the mass ratio of octadecylamine, hexamethylenetetramine and diethylenetriamine is 1:1:1) (flow rate: 1.5~2.5m) 3 / h, head: 2.5~3.0MPa) just inject it into the downpipe of the deaerator.

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

[0095] Deaerator lower water pipe → feed water front pump → feed water pump → high pressure water supply system → economizer → steam water separator (steam drum) → water wall → low temperature section superheater → high temperature section superheater → steam turbine high pressure cylinder → low temperature section re Heater → High-temperature section reheater.

[0096] The anion measurement results are as follows:

[0097] Water vapor analysis of X supercritical boiler in XX power plant (unit: μg / kg)

[0098]

Embodiment 2

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

[0101] During the operation of the unit, use a plunger pump for DFS (the mass ratio of hexamethylenetetramine and diethylenetriamine is 1:1:1) (flow rate: 1.5~2.5m) 3 / h, head: 2.5~3.0MPa) Just inject it into the downpipe of the deaerator.

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

[0103] Deaerator lower water pipe → feed water front pump → feed water pump → high pressure water supply system → economizer → steam water separator (steam drum) → water wall → low temperature section superheater → high temperature section superheater → steam turbine high pressure cylinder → low temperature section re Heater → High-temperature section reheater.

[0104] The anion measurement results are as follows:

[0105] Water vapor analysis of X supercritical boiler in XX power plant (unit: μg / kg)

[0106]

Embodiment 3

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

[0109] During the operation of the unit, the DFS (the mass ratio of octadecylamine, hexadecylamine, hexamethylenetetramine and diethylenetriamine is 1:1:1:1) with a plunger pump (flow rate: 1.5~2.5 m 3 / h, head: 2.5~3.0MPa) Just inject it into the downpipe of the deaerator.

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

[0111] Deaerator lower water pipe → feed water front pump → feed water pump → high pressure water supply system → economizer → steam water separator (steam drum) → water wall → low temperature section superheater → high temperature section superheater → steam turbine high pressure cylinder → low temperature section re Heater → High-temperature section reheater.

[0112] The anion measurement results are as follows:

[0113] Water vapor analysis of 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, especially supercritical or ultra-supercritical operating boilers, and specifically relates to a high-temperature steam corrosion inhibitor and its application. Its purpose is to inhibit and prevent the formation of oxide scales to reduce the damage of oxide scales. Background technique [0002] At present, my country's super (super) critical units generally have the problem of high temperature oxide scale. The thermal resistance effect of the oxide scale can cause the unit efficiency to drop significantly; the peeling of the oxide skin can cause boiler tube burst, unit non-stop and steam turbine solid particle erosion (SPE). According to statistics, there are nearly 100 supercritical (super) critical boilers across the country each year, which cause oxide scale blockage and tube explosion accidents, which are serious and cause huge losses. [0003] The presence of high-temperature oxide scale in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/02
CPCC23F11/02
Inventor 张振达张啸王佳田国良
Owner 张啸
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