CN109650480A - Minimum discharge stabilizer and preparation method thereof for the feed water system of boiler - Google Patents
Minimum discharge stabilizer and preparation method thereof for the feed water system of boiler Download PDFInfo
- Publication number
- CN109650480A CN109650480A CN201910075623.8A CN201910075623A CN109650480A CN 109650480 A CN109650480 A CN 109650480A CN 201910075623 A CN201910075623 A CN 201910075623A CN 109650480 A CN109650480 A CN 109650480A
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- Prior art keywords
- minimum discharge
- vapour phase
- oxygen scavenger
- boiler
- phase inhibitor
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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
-
- 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The minimum discharge stabilizer and preparation method thereof that the invention discloses a kind of for the feed water system of boiler.The minimum discharge stabilizer includes oxygen scavenger, regulator, vapour phase inhibitor and desalted water, the oxygen scavenger, the regulator, the vapour phase inhibitor and the desalted water mix, and the oxygen scavenger is at least one of dimethyl ketone oxime, sodium isoascorbate and N- isopropylhydroxyla；The regulator is at least one of ammonium hydroxide, cyclohexylamine and ring diethyl hydroxylamine, and the vapour phase inhibitor is at least one of triethanolamine and octadecylamine, and the minimum discharge stabilizer is added in the feed water system of boiler.
Description
Technical field
The present invention relates to boiler feedwater processing technology fields, more particularly, to a kind of for the super of the feed water system of boiler
Low emission stabilizer and preparation method thereof.
Background technique
Boiler is the equipment for generating steam and hot water, and the water quality of boiler feedwater has the safe operation of boiler and efficiency very big
Influence.PH value is to influence an important index of water quality.The variation of pH value directly influences the safety economy of boiler plant
Operation.Provided in the existing medium-pressure boiler water standard in China, steam boiler or hot-water boiler using dosing water process in furnace or
In water standard when furnace outer chemical water process, pH (25 DEG C) is that water supply is greater than 7.PH is higher or relatively low can all give boiler plant
Safe operation cause damages.For example, relatively low can cause acid corrosion to water supply, return water and draining system；It is higher to will cause carbonated drink
It rises altogether, the caustic cracking of boiler body and alkaline corrosion, reduction quality of filling gas jeopardize equipment safety.
Currently, the adjusting of industrial boiler water-supply mostly uses greatly ammonium hydroxide+hydrazine.This method has the disadvantage in that medicament
Dosage is big.It is big to the harm of human body when personnel operate due to the high volatility of medicament.And the medicament after thermal de-aeration
Regulating effect decaying is obvious.
Accordingly, it is desirable to provide a kind of new technical solution, to solve the above technical problems.
Summary of the invention
It is an object of the present invention to provide a kind of new technology sides of minimum discharge stabilizer for the feed water system of boiler
Case.
According to the first aspect of the invention, a kind of minimum discharge stabilizer for the feed water system of boiler is provided.This is super
Low emission stabilizer includes oxygen scavenger, regulator, vapour phase inhibitor and desalted water, the oxygen scavenger, the regulator, the gas
Phase corrosion inhibitor and the desalted water mix, and the oxygen scavenger is dimethyl ketone oxime, sodium isoascorbate and N- isopropyl
At least one of azanol；The regulator is at least one of ammonium hydroxide, cyclohexylamine and ring diethyl hydroxylamine, and the gas phase is slow
Losing agent is at least one of triethanolamine and octadecylamine, and the minimum discharge stabilizer is added in the feed water system of boiler.
Optionally, it is calculated according to mass percent, the oxygen scavenger is 10-55%, and the regulator is 30-50%, institute
Stating vapour phase inhibitor is 5-15%, and surplus is desalted water.
Optionally, the oxygen scavenger is dimethyl ketone oxime, and the regulator is ring diethyl hydroxylamine, according to mass percent
It calculates, dimethyl ketone oxime 10-15%, ring diethyl hydroxylamine is 35-45%, vapour phase inhibitor 7-9%.
Optionally, the oxygen scavenger is sodium isoascorbate, and the regulator is ring diethyl hydroxylamine, according to quality percentage
Number calculates, sodium isoascorbate 10-20%, and ring diethyl hydroxylamine is 30-50%, vapour phase inhibitor 5-10%.
Optionally, the oxygen scavenger is N- isopropylhydroxyla, and the regulator is ring diethyl hydroxylamine, according to quality percentage
Number calculates, and N- isopropylhydroxyla is 45-55%, and ring diethyl hydroxylamine is 30-40%, vapour phase inhibitor 10-15%.
Optionally, the oxygen scavenger is dimethyl ketone oxime, and the regulator is ring diethyl hydroxylamine, according to mass percent
It calculates, dimethyl ketone oxime 45%, ring diethyl hydroxylamine is 30%, vapour phase inhibitor 10%.
Optionally, the oxygen scavenger is dimethyl ketone oxime, and the regulator is ammonium hydroxide, is calculated according to mass percent, two
Methyl ketoxime is 41%, ammonium hydroxide 32%, vapour phase inhibitor 11%.
Optionally, the oxygen scavenger is dimethyl ketone oxime, and the regulator is cyclohexylamine, is calculated according to mass percent,
Dimethyl ketone oxime is 43%, cyclohexylamine 34%, vapour phase inhibitor 13%.
Optionally, the addition concentration in boiler water system is 3-15ppm.
A kind of preparation method of minimum discharge stabilizer another aspect of the present disclosure provides, the minimum discharge
Stabilizer is added in the feed water system of boiler.The preparation method includes: to mix oxygen scavenger, regulator and desalted water, with
Form mixed liquor；Cosolvent is added into the mixed liquor, to form intermediate solution；It is slow that gas phase is added into the intermediate solution
Agent is lost, and is uniformly mixed.
According to one embodiment of the disclosure, the vapour phase inhibitor is containing deoxygenation effectively volatile, with neutralization function
Agent, oxygen scavenger can adsorb oxygen, neutralize carbonic acid；The furnace steel in water supply system, vapour system and condensate system is provided simultaneously
Pre- film function, the risk of metal erosion in reduction system.
In addition, the minimum discharge stabilizer is smaller on the influence of the conductivity of boiler feedwater, steam and condensed water, in condensed water
It can be used in the case where whether there is or not precision processing.
In addition, the minimum discharge stabilizer has pre- film, passivation to make the feed water system of boiler, vapour system and condensate system
With guarantee boiler long period safe and stable operation.
In addition, the minimum discharge stabilizer can slowly remove original corrosion in vapour system and condensate system
Object.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the preparation side according to the minimum discharge stabilizer for the feed water system of boiler of one embodiment of the disclosure
The flow chart of method.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
According to one embodiment of the disclosure, a kind of minimum discharge stabilizer for the feed water system of boiler is provided.It should
Minimum discharge stabilizer includes oxygen scavenger, regulator, vapour phase inhibitor and desalted water.Oxygen scavenger, regulator, vapour phase inhibitor and
Desalted water mixes.The minimum discharge stabilizer is added in the feed water system of boiler.The feed water system of boiler refers to desalination
Water is transported to the system in boiler from oxygen-eliminating device by feed pump.For example, being provided with charging on the pipeline of the feed water system of boiler
Mouthful, minimum discharge stabilizer is added in the feed water system of boiler by pumping.
Oxygen scavenger is used to remove the oxygen in the desalted water of the feed water system of boiler.The presence of oxygen be easy to cause oxygen corrosion.Oxygen is rotten
Erosion is corrosion more serious in boiler system.The form of oxygen corrosion is generally the corrosion of ulcer type and pinhole type local corrosion, this
Kind corrosion is extremely serious to the damage of metal component intensity.The recurrent position of oxygen corrosion is boiler feedwater pipeline and province
Coal device.Oxygen scavenger can remove the oxygen in desalted water, prevent the generation of oxygen corrosion.
It is removed for example, oxygen scavenger is that at least one of dimethyl ketone oxime, sodium isoascorbate and N- isopropylhydroxyla are above-mentioned
Oxygen agent can be effectively removed the oxygen in desalted water, prevent the generation of oxygen corrosion.
Regulator is used to adjust the pH value of the desalted water of the feed water system of boiler.The pH value of usual furnace water is 9.0-10.5.?
Within the scope of this, furnace water is small to the corrosion of boiler body, and is not easy to form scale.
For example, regulator is at least one of ammonium hydroxide, cyclohexylamine and ring diethyl hydroxylamine.The dosage of above-mentioned regulator
Small, adjustment speed is fast, small to the harm of human body, environment.
Vapour phase inhibitor can constantly gasify within the scope of set temperature, to form gas.This gas absorption is in metal
Surface, and fine and close protective film layer is formed, to play the role of antirust.There are gas phases in boiler system.Vapor phase corrosion inhibitor
Agent can be effectively prevented the corrosion of furnace wall under gas phase condition.
For example, vapour phase inhibitor is at least one of triethanolamine and octadecylamine.The inhibition of above-mentioned vapour phase inhibitor is imitated
Fruit is good.
Desalted water is for dispersing above-mentioned various medicaments.Desalted water is the common knowledge of this field, is not elaborated herein.
Preferably, desalted water uses ultrapure water.Ultrapure water has the conducting medium of extremely low content, undissolved gas, colloid and has
Machine object (including bacterium etc.) etc..For example, the salt content of ultrapure water be less than 0.1mg/L, conductivity be 0.1-0.055 μ s/cm, 25 DEG C
When resistivity be 10 megaohms or more.Compared to common desalted water, the impurity content of ultrapure water is extremely low, this makes the furnace of boiler
The content of silica, sodium salt, organic matter etc. further decreases in water, and obtained steam is purer, and blowdown rate further drops
It is low.
Preferably, addition concentration of the minimum discharge stabilizer in the feed water system of boiler is 3-15ppm.Concentration, which is added, is
The ratio between additional amount and the amount of boiler feedwater of minimum discharge stabilizer.In the proportional region, the effect of minimum discharge stabilizer
Well, and the feature of environmental protection of furnace water is good, pollutes small.
It should be noted that the minimum discharge stabilizer can be directly appended in the feed water system of boiler, can also first use
It is then added in the feed water system of boiler after the dilution dilution agent such as desalted water.
According to one embodiment of the disclosure, the minimum discharge stabilizer is containing effectively volatile, with neutralization function
Oxygen scavenger, oxygen scavenger can adsorb oxygen, neutralize carbonic acid；Simultaneously to the furnace steel in water supply system, vapour system and condensate system
Pre- film function is provided, the risk of metal erosion in reduction system.
In addition, the dosage of the minimum discharge stabilizer is small, on the conductivity of boiler feedwater, steam and condensed water influence compared with
Small, in condensed water, whether there is or not can be used in the case where precision processing.The volatility of the minimum discharge stabilizer is weaker, to the danger of human body
Evil is small.
In addition, the minimum discharge stabilizer to the feed water system of boiler, vapour system and condensate system have pre- film, passivation
It acts on, with ensureing boiler long period safe and stable operation.The minimum discharge stabilizer has good stability, and drug effect is not easy to decay.
In addition, the minimum discharge stabilizer can slowly remove original corrosion in vapour system and condensate system
Object.
In one example, it is calculated according to mass percent, oxygen scavenger 10-55%, regulator 30-50%, gas phase
Corrosion inhibiter is 5-15%, and surplus is desalted water.In above range, the deaerating effect of the minimum discharge stabilizer, anticorrosion ability,
Adjust the excellent effect of pH value.
Embodiment 1:
Oxygen scavenger is dimethyl ketone oxime, and regulator is ring diethyl hydroxylamine, is calculated according to mass percent, dimethyl ketone oxime
For 10-15%, ring diethyl hydroxylamine is 35-45%, and vapour phase inhibitor 7-9%, surplus is desalted water.
Embodiment 2:
Oxygen scavenger is sodium isoascorbate, and regulator is ring diethyl hydroxylamine, is calculated according to mass percent, different Vitamin C
Sour sodium is 10-20%, and ring diethyl hydroxylamine is 30-50%, and vapour phase inhibitor 5-10%, surplus is desalted water.
Embodiment 3:
Oxygen scavenger is N- isopropylhydroxyla, and regulator is ring diethyl hydroxylamine, is calculated according to mass percent, N- isopropyl
Azanol is 45-55%, and ring diethyl hydroxylamine is 30-40%, and vapour phase inhibitor 10-15%, surplus is desalted water.
Embodiment 4:
Oxygen scavenger is dimethyl ketone oxime, and regulator is ring diethyl hydroxylamine, is calculated according to mass percent, dimethyl ketone oxime
It is 45%, ring diethyl hydroxylamine is 30%, and vapour phase inhibitor 10%, surplus is desalted water.
Embodiment 5:
Oxygen scavenger is dimethyl ketone oxime, and regulator is ammonium hydroxide, is calculated according to mass percent, dimethyl ketone oxime 41%,
Ammonium hydroxide is 32%, and vapour phase inhibitor 11%, surplus is desalted water.
Embodiment 6:
Oxygen scavenger is dimethyl ketone oxime, and regulator is cyclohexylamine, is calculated according to mass percent, and dimethyl ketone oxime is
43%, cyclohexylamine 34%, vapour phase inhibitor 13%, surplus is desalted water.
Embodiment 7:
It is calculated according to mass percent, sodium isoascorbate 24%, ring diethyl hydroxylamine are 33%, vapour phase inhibitor is
12%, surplus is desalted water.
Embodiment 8:
It is calculated according to mass percent, is 43% in N- isopropylhydroxyla, ring diethyl hydroxylamine is 34%, vapour phase inhibitor
It is 13%, surplus is desalted water.
Embodiment 9:
Calculated according to mass percent, dimethyl ketone oxime 23%, sodium isoascorbate 21%, cyclohexylamine 19%,
Ring diethyl hydroxylamine is 15%, vapour phase inhibitor 13%, and surplus is desalted water.
Embodiment 10:
It is calculated according to mass percent, dimethyl ketone oxime 16%, sodium isoascorbate 18%, N- isopropylhydroxyla are
11%, ring diethyl hydroxylamine be 35%, vapour phase inhibitor 14%, surplus is desalted water.
Embodiment 11:
Calculated according to mass percent, dimethyl ketone oxime 26%, sodium isoascorbate 20%, cyclohexylamine 35%,
Vapour phase inhibitor is 14%, and surplus is desalted water.
Embodiment 12:
It is calculated according to mass percent, sodium isoascorbate 27%, N- isopropylhydroxyla be 20%, ring diethyl hydroxylamine
For 15%, ammonium hydroxide 18%, vapour phase inhibitor 12%, surplus is desalted water.
Embodiment 13:
It is calculated according to mass percent, dimethyl ketone oxime 28%, N- isopropylhydroxyla be 20%, ammonium hydroxide 13%, ring
Hexylamine is 20%, vapour phase inhibitor 12%, and surplus is desalted water.
Embodiment 14:
It is calculated according to mass percent, dimethyl ketone oxime 12%, sodium isoascorbate 18%, N- isopropylhydroxyla are
19%, ring diethyl hydroxylamine be 32%, vapour phase inhibitor 13%, surplus is desalted water.
Embodiment 15:
It is calculated according to mass percent, dimethyl ketone oxime 32%, sodium isoascorbate 18%, ring diethyl hydroxylamine are
32%, vapour phase inhibitor 13%, surplus are desalted water
Embodiment 16:
It is calculated according to mass percent, dimethyl ketone oxime 22%, sodium isoascorbate 28%, ammonium hydroxide 31%, gas
Phase corrosion inhibitor is 13%, and surplus is desalted water.
Embodiment 17:
It is calculated according to mass percent, dimethyl ketone oxime 22%, sodium isoascorbate 14%, N- isopropylhydroxyla are
15, ring diethyl hydroxylamine be 30%, vapour phase inhibitor 14%, surplus is desalted water.
Embodiment 18:
It is calculated according to mass percent, dimethyl ketone oxime 51%, ring diethyl hydroxylamine are 30%, vapour phase inhibitor is
14%, surplus is desalted water.
Embodiment 19:
It being calculated according to mass percent, N- isopropylhydroxyla is 52%, cyclohexylamine 30%, vapour phase inhibitor 14%,
Surplus is desalted water.
Embodiment 20:
It is calculated according to mass percent, dimethyl ketone oxime 53%, cyclohexylamine 10%, ring diethyl hydroxylamine be 20%,
Vapour phase inhibitor is 14%, and surplus is desalted water.
Embodiment 21:
It is calculated according to mass percent, dimethyl ketone oxime 54%, ring diethyl hydroxylamine are 30%, vapour phase inhibitor is
14%, surplus is desalted water.
Embodiment 22:
It is calculated according to mass percent, dimethyl ketone oxime 55%, cyclohexylamine 30%, vapour phase inhibitor 14% are remaining
Amount is desalted water.
The deoxygenation for the minimum discharge stabilizer that above-mentioned each embodiment obtains, inhibition, pre-film effect are good.
According to another embodiment of the present disclosure, a kind of preparation method of minimum discharge stabilizer is provided.The ultralow row
Stabilizer is put to be added in the feed water system of boiler.As shown in Figure 1, the preparation method includes:
Oxygen scavenger, regulator and desalted water are mixed, to form mixed liquor.For example, at normal temperatures and pressures, by deoxygenation
Agent, regulator and desalted water, which are added in stirred tank, to be stirred.
Cosolvent is added, into mixed liquor to form intermediate solution.For example, adding hydrotropy in mixed liquor into stirring
Agent, and continue to stir setting time, to obtain intermediate liquid.Cosolvent is for increasing oxygen scavenger in mixed solution dissolubility and steady
It is qualitative, for example, cosolvent includes dimethylacetamide solvent etc..
Vapour phase inhibitor is added into intermediate solution, and is uniformly mixed.For example, adding gas phase in mixed liquor into stirring
Corrosion inhibiter, and continue to stir, to obtain minimum discharge stabilizer.
In the preparation method, first by oxygen scavenger, regulator in desalted water, and is mixed, hydrotropy is then added
Agent, and continue to mix, it is eventually adding vapour phase inhibitor.It is de- that cosolvent can effectively be such that oxygen scavenger and regulator is dispersed in
In salt water.Vapour phase inhibitor is being eventually adding, and can be effectively prevented the gasification of vapour phase inhibitor.
The quality for the minimum discharge stabilizer that the preparation method is prepared is uniform, and dispersion effect is good.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (10)
1. a kind of minimum discharge stabilizer for the feed water system of boiler, wherein including oxygen scavenger, regulator, vapour phase inhibitor
And desalted water, the oxygen scavenger, the regulator, the vapour phase inhibitor and the desalted water mix, the deoxygenation
Agent is at least one of dimethyl ketone oxime, sodium isoascorbate and N- isopropylhydroxyla；The regulator is ammonium hydroxide, cyclohexylamine
At least one of with ring diethyl hydroxylamine, the vapour phase inhibitor is at least one of triethanolamine and octadecylamine, described
Minimum discharge stabilizer is added in the feed water system of boiler.
2. minimum discharge stabilizer according to claim 1, wherein calculated according to mass percent, the oxygen scavenger is
10-55%, the regulator are 30-50%, and the vapour phase inhibitor is 5-15%, and surplus is desalted water.
3. minimum discharge stabilizer according to claim 2, wherein the oxygen scavenger is dimethyl ketone oxime, the adjusting
Agent is ring diethyl hydroxylamine, is calculated according to mass percent, dimethyl ketone oxime 10-15%, and ring diethyl hydroxylamine is 35-
45%, vapour phase inhibitor 7-9%.
4. minimum discharge stabilizer according to claim 2, wherein the oxygen scavenger is sodium isoascorbate, the tune
Section agent is ring diethyl hydroxylamine, is calculated according to mass percent, sodium isoascorbate 10-20%, and ring diethyl hydroxylamine is 30-
50%, vapour phase inhibitor 5-10%.
5. minimum discharge stabilizer according to claim 2, wherein the oxygen scavenger is N- isopropylhydroxyla, the tune
Section agent is ring diethyl hydroxylamine, is calculated according to mass percent, and N- isopropylhydroxyla is 45-55%, and ring diethyl hydroxylamine is 30-
40%, vapour phase inhibitor 10-15%.
6. minimum discharge stabilizer according to claim 2, wherein the oxygen scavenger is dimethyl ketone oxime, the adjusting
Agent is ring diethyl hydroxylamine, is calculated according to mass percent, dimethyl ketone oxime 45%, and ring diethyl hydroxylamine is 30%, gas phase
Corrosion inhibiter is 10%.
7. minimum discharge stabilizer according to claim 2, wherein the oxygen scavenger is dimethyl ketone oxime, the adjusting
Agent is ammonium hydroxide, is calculated according to mass percent, dimethyl ketone oxime 41%, ammonium hydroxide 32%, vapour phase inhibitor 11%.
8. minimum discharge stabilizer according to claim 2, wherein the oxygen scavenger is dimethyl ketone oxime, the adjusting
Agent is cyclohexylamine, is calculated according to mass percent, dimethyl ketone oxime 43%, cyclohexylamine 34%, vapour phase inhibitor 13%.
9. minimum discharge stabilizer described in any one in -8 according to claim 1, wherein it is in boiler water system plus
Entering concentration is 3-15ppm.
10. a kind of preparation method of minimum discharge stabilizer, the minimum discharge stabilizer are added in the feed water system of boiler,
In, comprising:
Oxygen scavenger, regulator and desalted water are mixed, to form mixed liquor；
Cosolvent is added into the mixed liquor, to form intermediate solution；
Vapour phase inhibitor is added into the intermediate solution, and is uniformly mixed.
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| CN201910075623.8A CN109650480A (en) | 2019-01-25 | 2019-01-25 | Minimum discharge stabilizer and preparation method thereof for the feed water system of boiler |
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Application publication date: 20190419 |
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