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Boiler oxygen scavenger

A scavenger and boiler technology, applied in degassed water/sewage treatment, neutralized water/sewage treatment, reduced water/sewage treatment, etc.

Inactive Publication Date: 2014-10-22
WEIHAI XIANGYU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use conditions of traditional oxygen scavengers such as hydrazine and sodium sulfite are more restricted
The effect of using hydrazine is greatly affected by the water temperature. When the water temperature is higher than 150°C, the reaction is faster, but when the water temperature is lower than 50°C, the reaction is very slow; in addition, the effect of using hydrazine is also affected by the pH value, only When the pH value of water is between 9-11, the reaction speed is faster; moreover, hydrazine itself is toxic and flammable, so there are safety problems in use, storage and transportation, and it cannot be used in boiler return water. When drinking water or in contact with food
Sodium sulfite can only be used in medium and low pressure boiler systems. It is also moderately toxic and easily oxidized in the air, so its use is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] First, add a certain amount of 40g deionized water into the reactor with stirring device, and start to heat up. When the water temperature reaches 40°C, turn on the stirring device and start stirring. Ethylene glycol 200, 10g diethylhydroxylamine continue to stir for 10-15 minutes, then add 10g cyclohexane and stir for 15 minutes, then let it stand still for 2 hours.

[0015] How to use: Dilute this product properly with demineralized water, and add it to the dosing pipeline of the deaerator water tank with a metering pump.

Embodiment 2

[0017] First, add a certain amount of 40g deionized water into the reactor with stirring device, and start to heat up. When the water temperature reaches 40°C, turn on the stirring device and start stirring, add 30g of isoascorbic acid, 10g of carbohydrazide in turn, and add 6g of polyhydrazine after 10 minutes. Ethylene glycol 200, 10g diethylhydroxylamine continue to stir for 10-15 minutes, then add 10g cyclohexane and stir for 15 minutes, then let it stand still for 2 hours.

[0018] How to use: Dilute this product properly with demineralized water, and add it to the dosing pipeline of the deaerator water tank with a metering pump.

Embodiment 3

[0020] First, add a certain amount of 40g deionized water into the reactor with a stirring device, and start to heat up. When the water temperature reaches 40°C, turn on the stirring device and start stirring, and then add 25g erythorbic acid, 15g acetone oxime, and 10 minutes later add 6gPPAS, 10g Continue to stir the isopropyl hydroxylamine for 10~15 minutes, then add 10g of ethanolamine and stir for 15 minutes, then let it stand still for 2 hours.

[0021] How to use: Dilute this product properly with demineralized water, and add it to the dosing pipeline of the deaerator water tank with a metering pump.

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PUM

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Abstract

The invention provides a boiler oxygen scavenger and a preparation method of the boiler oxygen scavenger. The boiler oxygen scavenger comprises an organic reducing agent, a dispersing agent, a passivating agent, a pH adjusting agent and water, where the mass ratio of the organic reducing agent to the dispersing agent to the passivating agent to the pH adjusting agent to water is (10-40): (1-10): (5-20): (5-10): (20-40). The invention also provides a preparation method of the boiler oxygen scavenger. The method comprises the steps of sequentially adding the organic reducing agent, the dispersing agent, the passivating agent, the pH adjusting agent and water in parts by mass in a reactor in which a stirrer is arranged, stirring and dissolving to obtain the product disclosed by the invention, the boiler oxygen scavenger disclosed by the invention is non-toxic and harmless liquid chemical agent and can be used in the condition that boiler return water is used as drinking water or comes into contact with food. The boiler oxygen scavenger disclosed by the invention has an excellent effect of removing dissolved oxygen out of the boiler feed water and also can greatly reduce the contents of copper and iron in the feed water system; and therefore the boiler oxygen scavenger can be widely used in the fields of high-pressure and medium-pressure boiler water treatment.

Description

technical field [0001] The invention relates to the field of boiler water treatment, in particular to a boiler water treatment agent, in particular to a boiler oxygen scavenger and a preparation method thereof. Background technique [0002] With the process of industrialization in our country, more and more industrial production is applied to medium and high pressure boiler systems. Due to the limitation of the boiler system's requirements for feed water conditions, most boiler systems use demineralized water as water replenishment. However, due to the low hardness of desalted water and the low Langelier index (LSI) of water, it is more likely to cause metal corrosion during the operation of the boiler system. Boiler corrosion is a worldwide problem. Boiler metal corrosion not only shortens the service life of the equipment itself and causes economic losses, but also increases the impurities in the water due to the metal corrosion products entering the water, thus aggravatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/20C02F1/70C02F1/66
Inventor 毕俊昌李洪社喻果
Owner WEIHAI XIANGYU TECH
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