CN108585094A - The high pressure boiler water supply oxygen scavenger and preparation method thereof used suitable for low temperature - Google Patents
The high pressure boiler water supply oxygen scavenger and preparation method thereof used suitable for low temperature Download PDFInfo
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- CN108585094A CN108585094A CN201810489095.6A CN201810489095A CN108585094A CN 108585094 A CN108585094 A CN 108585094A CN 201810489095 A CN201810489095 A CN 201810489095A CN 108585094 A CN108585094 A CN 108585094A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The present invention proposes a kind of high pressure boiler water supply oxygen scavenger and preparation method thereof used suitable for low temperature, includes the raw material components of following parts by weight：5~25 parts of organic reducing agent, 2~50 parts of neutralizing amine, 0.05~8 part of soluble carboxylic acid, 0.05~5 part of catalyst and 10~70 parts of desalted water.The high-pressure boiler oxygen scavenger of the present invention, when oxygen-eliminating device leaving water temperature is down to 80 DEG C or so, oxygen-eliminating device can be substituted for high-pressure boiler rapidly and efficiently deoxygenation, the pH value that high pressure boiler water supply can be adjusted simultaneously, makes final deoxygenation rate reach 99.5% or more, realizes the purpose of deep deoxygenization, there is passivation to high-pressure boiler pipeline material simultaneously, inhibit the corrosion of condensed water, and any negative effect will not be caused to boiler water completely, does not influence the quality of steam.And since product is almost without toxicity, any harmful effect will not be caused to operator and environment.
Description
Technical field
The invention belongs to boiler water-treatment technology fields more particularly to a kind of high pressure boiler water supply used suitable for low temperature to remove
Oxygen agent and preparation method thereof.
Background technology
Boiler is industrial important motivity equipment.In boiler running process, the dissolved oxygen in water is to lead to furnace body
One of the main reason for corrosion.Dissolved oxygen corrosion causes equipment and materials destruction first, increases the maintenance cost of equipment, shortens
The service life of boiler.At the same time, heat transfer deterioration can be made by being attached to corrosion product on boiler tube wall and heating surface, cause boiler
Heat transfer loss increases, and causes tube wall temperature to increase, overheat, bulge, the probability that accident occurs for boiler has been significantly greatly increased.In order to prevent
Oxygen corrosion needs to carry out deoxygenation processing to boiler feed water.Current boiler feed water deoxygenation processing generally using based on thermal de-aeration,
Processing mode supplemented by chemical deoxidization.
And carry out the increasing of dynamics recently as environmental protection policy, miniature boiler and personal coal-burning boiler are gradually taken
It forms.Due to the demand of production and living, need largely to purchase steam.Steam often occurs for the enterprise for therefore having large-sized boiler
The case where supply falls short of demand.When oxygen-eliminating device works normally, need to consume a large amount of steam, highest even can occupy total quantity of steam
20%.Since oxygen-eliminating device is in normal work, oxygen, carbon dioxide etc. can be discharged with exhaust-valve, to reach the mesh of deoxygenation
's.But it at the same time, also has a large amount of steam therewith to drain.In order to play the macroeconomic effect saved steam, improve enterprise
The purpose of benefit, many enterprise's selections reduce oxygen-eliminating device temperature, save some vapor.It, must however as the reduction of oxygen-eliminating device temperature
Boiler feedwater dissolved oxygen content can be so caused to increase.And oxygen scavenger majority on the market is only used under hot operation state at present
Boiler system when (130 DEG C or more) oxygen-eliminating device.
Usually used oxygen scavenger includes inorganic oxygen scavenger and organic oxygen scavenger in currently available technology, wherein inorganic deoxygenation
Agent can play good deaerating effect at normal temperatures such as sodium sulfite, sodium hydrogensulfite, ammonium bisulfite, but due to height
It is desalted water under normal circumstances to press boiler feedwater, high to water quality requirement.It is negative that boiler water can be significantly greatly increased in the addition of inorganic salts
Load, and under high temperature and high pressure environment, be extremely easy in decomposition to form sulfuric acid, cause stove water pH value drastically to decline, aggravates boiler and its correlation
The corrosion of pipeline.And organic oxygen scavenger, such as carbohydrazide, hydrazine are required to high temperature and just can guarantee deaerating effect, and produce
Product itself have the shortcomings that carcinogenic, dosage is high.
Invention content
The present invention for the above technical issues, proposes a kind of high pressure boiler water supply oxygen scavenger used suitable for low temperature.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of high pressure boiler water supply oxygen scavenger used suitable for low temperature, includes the raw material components of following parts by weight：5~25
Part organic reducing agent, 2~50 parts of neutralizing amine, 0.05~8 part of soluble carboxylic acid, 0.05~5 part of catalyst and 10~
70 parts of desalted water.
Preferably, including the raw material components of following parts by weight：10~18 parts of organic reducing agent, in 15~40 parts
With amine, 0.1~3 part of soluble carboxylic acid, 0.1~3 part of catalyst and 24~31 parts of desalted water.
Preferably, the organic reducing agent is N, N, N ', N ' -- in four substitution phenylenediamines, acetaldoxime and hydroquinone
One or more combination.
Preferably, the neutralizing amine is any one of morpholine, cyclohexylamine and diethyl ethylene diamine.
Preferably, the soluble carboxylic acid is any one of citric acid, acetic acid and malic acid.
Preferably, the catalyst is cobalt chloride or copper sulphate.
Preferably, the Applicable temperature of the oxygen scavenger is ranging from more than or equal to 80 DEG C.
Preferably, the amount per oxygen scavenger needed for 1ppm dissolved oxygens is 20~50ppm.
The preparation method of the above-mentioned high pressure boiler water supply oxygen scavenger used suitable for low temperature, includes the following steps：In dry
Desalted water is added in reaction kettle, and continues to add organic reducing agent, after 20~50min is mixed, is added and is neutralized into solution
Amine, and 5~15min is stirred, soluble carboxylic acid is added into the solution after stirring, and stir 15~35min, continues after stirring
Solution in be added catalyst, 5~30min of stirring is to being completely dissolved.
Compared with prior art, the advantages and positive effects of the present invention are：
A kind of high pressure boiler water supply oxygen scavenger used suitable for low temperature provided by the invention, when oxygen-eliminating device leaving water temperature is down to
At 80 DEG C or so, rapidly and efficiently deoxygenation of the oxygen-eliminating device for high pressure boiler water supply can be substituted, while high-pressure boiler can be adjusted
The pH value of water supply makes final deoxygenation rate reach 99.5% or more, realizes the purpose of deep deoxygenization, and be added with oxygen scavenger of the present invention
High pressure boiler water supply to high-pressure boiler pipeline material have passivation, inhibit the corrosion of condensed water, and completely will not be to pot
Water causes any negative effect in stove, does not influence the quality of steam.It, will not be to operator and since product is almost without toxicity
And environment causes any harmful effect.
Specific implementation mode
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without making creative work belongs to the model that the present invention protects
It encloses.
An embodiment of the present invention provides a kind of high pressure boiler water supply oxygen scavengers used suitable for low temperature, including following parts by weight
Several raw material components：5~25 parts of organic reducing agent, 2~50 parts of neutralizing amine, 0.05~8 part of soluble carboxylic acid, 0.05~
5 parts of catalyst and 10~70 parts of desalted water.In order to further increase high-pressure boiler oxygen scavenger deaerating effect and adjusting to
Water pH value, further preferred high-pressure boiler oxygen scavenger of the present invention comprising the raw material components of following parts by weight：10~18 parts
Organic reducing agent, 15~40 parts of neutralizing amine, 0.1~3 part of soluble carboxylic acid, 0.1~3 part of catalyst and 24~31 parts
Desalted water.
For the above-mentioned high pressure boiler water supply oxygen scavenger used suitable for low temperature provided by the invention, wherein in raw material components
Organic reducing agent described in compatibility uses as deoxygenation raw material in the case where not compounding other components of the present invention and needs very high temperature
Redox reaction could be occurred with oxygen by spending (>=130 DEG C even higher), can not effectively be reduced boiler feedwater dissolved oxygen and be contained
Amount, makes the requirement of its satisfaction≤7ppb.The present invention pass through many experiments, screening obtain by organic reducing agent simultaneously with neutralizing amine,
Soluble carboxylic acid and catalyst compound, wherein the organic reducing agent as described in only addition in oxygen scavenger, then when oxygen-eliminating device is discharged
When temperature is down to 80 DEG C or so, deaerating effect can not be generated, when using organic reducing agent simultaneously with neutralizing amine, soluble carboxylic acid and
Deaerating effect can be just played when catalyst is compounded.
The deoxygenation performance for greatly optimizing organic reducing agent, keeps its scope of application wider, for the oxygen of lower content
Gas can also effectively remove, and under conditions of 80 DEG C or so, remain to that redox reaction occurs rapidly, reach ideal deoxygenation effect
Fruit.
In an alternative embodiment, the organic reducing agent is N, N, N ', N '-four replaces phenylenediamine, acetaldoxime and to benzene
One or more of diphenol combines, and as oxygen scavenger main component, redox reaction occurs with oxygen, to remove boiler to
The dissolved oxygen of water.The neutralizing amine is any one of morpholine, cyclohexylamine and diethyl ethylene diamine, plays synergy in the present invention
With the effect for improving water supply pH value.The soluble carboxylic acid is any one of citric acid, acetic acid and malic acid, can play stabilization
The effect of system.The catalyst is cobalt chloride or copper sulphate, primarily serves the effect of catalytic in the present invention.This
Invention is by the mutual compatibility of above-mentioned each component, so that the high-pressure boiler oxygen scavenger finally obtained is used suitable for low temperature, enough substitute is removed
Oxygen device is used for high-pressure boiler rapidly and efficiently deoxygenation, while can adjust the pH value of water in high-pressure boiler, and final deoxygenation rate is made to reach
99.5% or more.
In an alternative embodiment, the Applicable temperature of the oxygen scavenger is ranging from more than or equal to 80 DEG C.
It is as follows for the high pressure boiler water supply oxygen scavenger application method provided in an embodiment of the present invention used suitable for low temperature：It adopts
It is continuously added to the water outlet of oxygen-eliminating device with diaphragm pump, the dosing of this product is determined according to boiler feedwater dissolved oxygen content
Amount.Amount wherein per oxygen scavenger needed for 1ppm dissolved oxygens is 20~50ppm, the specific amount per oxygen scavenger needed for 1ppm dissolved oxygens
For 20ppm, 25ppm, 30ppm, 35ppm, 40ppm, 45ppm or 50ppm, the preferred amount per oxygen scavenger needed for 1ppm dissolved oxygens
For 30ppm, on the additive amount, the oxygen removal efficiency highest of the oxygen scavenger, use cost is minimum.
The embodiment of the present invention also provides a kind of preparation method of the high pressure boiler water supply oxygen scavenger used suitable for low temperature, including
Following steps：Desalted water is added in dry reaction kettle, and continues to add organic reducing agent, after 20~50min is mixed,
It is added neutralizing amine into solution, and stirs 5~15min, soluble carboxylic acid is added into the solution after stirring, and stir 15~
35min continues that catalyst is added in the solution after stirring, and 5~30min is to being completely dissolved for stirring.
In order to become apparent from introduce in detail a kind of high-pressure boiler used suitable for low temperature that the embodiment of the present invention provided to
Water oxygen scavenger and preparation method thereof, is described below in conjunction with specific embodiment.
Embodiment 1
A kind of high pressure boiler water supply oxygen scavenger used suitable for low temperature, includes the raw material components of following parts by weight：5 parts
Hydroquinone, 50 parts of diethyl ethylene diamine, 0.05 part of citric acid, 5 parts of copper sulphate and 10 parts of desalted water.
The preparation method of the above-mentioned high pressure boiler water supply oxygen scavenger used suitable for low temperature, specifically includes following steps：
According to above-mentioned each raw material component value, desalted water is added in dry reaction kettle, and continues to add organic reducing agent,
After 20min is mixed, neutralizing amine is added into solution, and stir 15min, soluble carboxylic is added into the solution after stirring
Acid, and stir 15min, continues that catalyst is added in the solution after stirring, and stirring 30min is to being completely dissolved.
Embodiment 2
A kind of high pressure boiler water supply oxygen scavenger used suitable for low temperature, includes the raw material components of following parts by weight：10 parts
N, N, N ', N '-four replaces phenylenediamine, 50 parts of neutralizing amine, 0.05 part of soluble carboxylic acid, 0.05 part of catalyst and 31 parts
Desalted water.
The preparation method of the above-mentioned high pressure boiler water supply oxygen scavenger used suitable for low temperature, specifically includes following steps：
According to above-mentioned each raw material component value, desalted water is added in dry reaction kettle, and continues to add organic reducing agent,
After 30min is mixed, neutralizing amine is added into solution, and stir 10min, soluble carboxylic is added into the solution after stirring
Acid, and stir 25min, continues that catalyst is added in the solution after stirring, and stirring 25min is to being completely dissolved.
Embodiment 3
A kind of high pressure boiler water supply oxygen scavenger used suitable for low temperature, includes the raw material components of following parts by weight：10 parts
Hydroquinone, 40 parts of cyclohexylamine, 0.1 part of acetic acid, 3 parts of cobalt chloride and 24 parts of desalted water.
The preparation method of the above-mentioned high pressure boiler water supply oxygen scavenger used suitable for low temperature, specifically includes following steps：
According to above-mentioned each raw material component value, desalted water is added in dry reaction kettle, and continues to add organic reducing agent,
After 35min is mixed, neutralizing amine is added into solution, and stir 12min, soluble carboxylic is added into the solution after stirring
Acid, and stir 20min, continues that catalyst is added in the solution after stirring, and stirring 24min is to being completely dissolved.
Embodiment 4
A kind of high pressure boiler water supply oxygen scavenger used suitable for low temperature, includes the raw material components of following parts by weight：5 parts
Acetaldoxime, 5 parts of hydroquinone, 40 parts of diethyl ethylene diamine, the copper sulphate of 0.1 part of 0.05 part of acetic acid and 49.85 parts
Desalted water.
The preparation method of the above-mentioned high pressure boiler water supply oxygen scavenger used suitable for low temperature, specifically includes following steps：
According to above-mentioned each raw material component value, desalted water is added in dry reaction kettle, and continues to add organic reducing agent,
After 35min is mixed, neutralizing amine is added into solution, and stir 10min, soluble carboxylic is added into the solution after stirring
Acid, and stir 28min, continues that catalyst is added in the solution after stirring, and stirring 20min is to being completely dissolved.
Embodiment 5
A kind of high pressure boiler water supply oxygen scavenger used suitable for low temperature, includes the raw material components of following parts by weight：18 parts
Acetaldoxime, 15 parts of morpholine, 3 parts of malic acid, 0.1 part of copper sulphate and 31 parts of desalted water.
The preparation method of the above-mentioned high pressure boiler water supply oxygen scavenger used suitable for low temperature, specifically includes following steps：
According to above-mentioned each raw material component value, desalted water is added in dry reaction kettle, and continues to add organic reducing agent,
After 40min is mixed, neutralizing amine is added into solution, and stir 10min, soluble carboxylic is added into the solution after stirring
Acid, and stir 32min, continues that catalyst is added in the solution after stirring, and stirring 15min is to being completely dissolved.
Embodiment 6
A kind of high pressure boiler water supply oxygen scavenger used suitable for low temperature, includes the raw material components of following parts by weight：18 parts
Hydroquinone, 50 parts of cyclohexylamine, 0.05 part of malic acid, 0.05 part of cobalt chloride and 31 parts of desalted water.
The preparation method of the above-mentioned high pressure boiler water supply oxygen scavenger used suitable for low temperature, specifically includes following steps：
According to above-mentioned each raw material component value, desalted water is added in dry reaction kettle, and continues to add organic reducing agent,
After 40min is mixed, neutralizing amine is added into solution, and stir 12min, soluble carboxylic is added into the solution after stirring
Acid, and stir 25min, continues that catalyst is added in the solution after stirring, and stirring 22min is to being completely dissolved.
Embodiment 7
A kind of high pressure boiler water supply oxygen scavenger used suitable for low temperature, includes the raw material components of following parts by weight：15 parts
N, N, N ', N '-four replace phenylenediamine, 10 parts of acetaldoxime, 2 parts of diethyl ethylene diamine, 8 parts of malic acid, 0.05 part
Cobalt chloride and 70 parts of desalted water.
The preparation method of the above-mentioned high pressure boiler water supply oxygen scavenger used suitable for low temperature, specifically includes following steps：
According to above-mentioned each raw material component value, desalted water is added in dry reaction kettle, and continues to add organic reducing agent,
After 50min is mixed, neutralizing amine is added into solution, and stir 5min, soluble carboxylic acid is added into the solution after stirring,
And 35min is stirred, continue that catalyst is added in the solution after stirring, 5min is to being completely dissolved for stirring.
The high pressure boiler water supply oxygen scavenger performance detection experiment for being suitable for low temperature and using of the embodiment of the present invention 1~7：
Experimental method：
Grouping：Using the high-pressure boiler oxygen scavenger of Examples 1 to 7 as experimental group, to be only added with removing for organic reducing agent
Oxygen agent as a control group one, while blank group is set.
Using desalted water as simulated high-pressure boiler feed water, 5000mL conical flask 2min are blown with carbon dioxide steel cylinder, are added
In the tap water to conical flask of 5000mL, puts it into water-bath and be heated to 80 DEG C.For in the conical flask of each grouping points
Not Jia Ru 120ppm experimental groups and control group oxygen scavenger, react 2min after, using HK-258 portable micro dissolved oxygens detect
Instrument detects respectively, while being detected using pH meter.
Testing result：
Testing result is as shown in table 1：
The high pressure boiler water supply oxygen scavenger performance detection experimental result for being suitable for low temperature and using of 1 Examples 1 to 7 of table
By 1 data result of table it is found that in terms of deoxygenation performance test data result, Examples 1 to 7 is above certain external brand
The deaerating effect of high-pressure boiler oxygen scavenger, deaerating effect is excellent, and the pH of the high pressure boiler water supply of addition the present embodiment is 8.8
Between~9.3, water supply pH value is adjusted without additional addition ammonium hydroxide.
Claims (9)
1. a kind of high pressure boiler water supply oxygen scavenger used suitable for low temperature, it is characterised in that：Include the raw material of following parts by weight
Component：5~25 parts of organic reducing agent, 2~50 parts of neutralizing amine, 0.05~8 part of soluble carboxylic acid, 0.05~5 part urge
Agent and 10~70 parts of desalted water.
2. the high pressure boiler water supply oxygen scavenger according to claim 1 used suitable for low temperature, it is characterised in that：Including following
The raw material components of parts by weight：10~18 parts of organic reducing agent, 15~40 parts of neutralizing amine, 0.1~3 part of soluble carboxylic
Acid, 0.1~3 part of catalyst and 24~31 parts of desalted water.
3. the high pressure boiler water supply oxygen scavenger according to claim 1 or 2 used suitable for low temperature, it is characterised in that：It is described
Organic reducing agent is N, N, N ', N '-four replaces the combination of one or more of phenylenediamine, acetaldoxime and hydroquinone.
4. the high pressure boiler water supply oxygen scavenger according to claim 1 or 2 used suitable for low temperature, it is characterised in that：It is described
Neutralizing amine is any one of morpholine, cyclohexylamine and diethyl ethylene diamine.
5. the high pressure boiler water supply oxygen scavenger according to claim 1 or 2 used suitable for low temperature, it is characterised in that：It is described
Soluble carboxylic acid is any one of citric acid, acetic acid and malic acid.
6. the high pressure boiler water supply oxygen scavenger according to claim 1 or 2 used suitable for low temperature, it is characterised in that：It is described
Catalyst is cobalt chloride or copper sulphate.
7. being suitable for the high pressure boiler water supply oxygen scavenger that low temperature uses according to claim 1~6 any one of them, feature exists
In：The Applicable temperature of the oxygen scavenger is ranging from more than or equal to 80 DEG C.
8. being suitable for the high pressure boiler water supply oxygen scavenger that low temperature uses according to claim 1~6 any one of them, feature exists
In：Amount per oxygen scavenger needed for 1ppm dissolved oxygens is 20~50ppm.
9. a kind of claim 1~8 any one of them is suitable for the preparation method for the high pressure boiler water supply oxygen scavenger that low temperature uses,
It is characterized in that：Include the following steps：Desalted water is added in dry reaction kettle, and continues to add organic reducing agent, mixing
After stirring 20~50min, neutralizing amine is added into solution, and stir 5~15min, is added into the solution after stirring soluble
Carboxylic acid, and 15~35min is stirred, continue that catalyst is added in the solution after stirring, 5~30min is to being completely dissolved for stirring.
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