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A medicament and a dosing method for controlling the running corrosion of an air-cooling system in a thermal power plant

An air-cooling system, operating corrosion technology, applied in lighting and heating equipment, damage protection, heat exchange equipment, etc., can solve the problems of insufficient attention to control air cooling system corrosion, operating corrosion, etc.

Active Publication Date: 2018-03-30
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the air-cooling system of domestic direct air-cooling units is generally severely corroded. At present, the focus of attention is mainly on improving the removal effect of corrosion products and avoiding the impact of corrosion products on the operation of subsequent thermal equipment. The corrosion control of air-cooling systems has not received enough attention.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In a 300MW direct air-cooling unit in a power plant, the chemical formula is: 2% N, N-dimethylethanolamine, 1% triethanolamine, 4% diethanolamine, 1% ethanolamine, 1% methoxypropylamine, 5% di After adding isopropylamine, 10% N-(2-aminoethyl) morpholine and 4% hydrazine, the drug concentration in the system is 0.3 mg / L, and the amount of ammonia added to the water remains unchanged (2-5 mg / L), and the condensation The average iron content of the water decreased from 38 μg / L to 12 μg / L, and the average iron content of the initial setting water decreased from 278 μg / L to 58 μg / L.

Embodiment 2

[0016] In a 300MW direct air-cooling unit in a power plant, the chemical formula is: 2% N, N-dimethylethanolamine, 1% triethanolamine, 4% diethanolamine, 1% ethanolamine, 1% methoxypropylamine, 5% di After addition of isopropylamine, 10% N-(2-aminoethyl)morpholine and 4% hydrazine, the drug concentration in the system is 0.5 mg / L, and the amount of ammonia added to the water supply is reduced from 2 to 5 mg / L to 0.5 to 0.5 mg / L. After 1.0mg / L, the average iron content of condensed water decreased from 41μg / L to 8μg / L, and the average iron content of primary condensate decreased from 320μg / L to 52μg / L.

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Abstract

A medicament and a dosing method for controlling the running corrosion of an air-cooling system in a thermal power plant, the medicament includes 1% to 10% N, N-dimethylethanolamine, 0% to 10% 3-diethylaminopropylamine, 1% to 10 %Triethanolamine, 0%~10% diethanolamine, 1%~10% ethanolamine, 1%~10% methoxypropylamine, 1%~10% diisopropylamine, 0%~10% hexamethylene tetra Amine, 0% to 10% N-(2-aminoethyl) morpholine and 1% to 10% hydrazine are at least six of the ten kinds of medicaments, and the balance is deionized water, which is prepared into a solution by deionized water; Adding a concentration of 0.3mg / L to 1.5mg / L can effectively control the corrosion of the air-cooling system, and has no effect on the performance of the condensate demineralization resin. Long-term operation under conditions.

Description

technical field [0001] The invention relates to the corrosion field of an air-cooling system of a direct air-cooling unit of a thermal power plant, in particular to a medicament and a dosing method for controlling the running corrosion of the air-cooling system of a thermal power plant. technical background [0002] Due to the operating characteristics of the air-cooling system of the direct air-cooling unit of the thermal power plant, its corrosion rate is much faster than that of the wet-cooling unit, resulting in a long-term high iron content in the condensate of the direct air-cooling unit. The current iron removal filter and strong magnetic iron remover and other equipment have reduced the iron content of condensed water to a certain extent from the surface, but the corrosion of the air cooling system has not been fundamentally resolved. The effect of simply increasing the amount of ammonia added to the feed water to control the corrosion of the air-cooling system is li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/14F28F19/00
Inventor 张祥金邓宇强曹杰玉龙国军姚建涛
Owner XIAN THERMAL POWER RES INST CO LTD
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