CN110294538A - A kind of compound deoxygenation scale inhibitor and preparation method thereof applied to boiler low-hardness water - Google Patents
A kind of compound deoxygenation scale inhibitor and preparation method thereof applied to boiler low-hardness water Download PDFInfo
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- CN110294538A CN110294538A CN201910675666.XA CN201910675666A CN110294538A CN 110294538 A CN110294538 A CN 110294538A CN 201910675666 A CN201910675666 A CN 201910675666A CN 110294538 A CN110294538 A CN 110294538A
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- maleic anhydride
- copolymer
- lignin sulfonate
- scale 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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
- C02F5/04—Softening water by precipitation of the hardness using phosphates
-
- 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
A kind of compound deoxygenation scale inhibitor and preparation method thereof applied to boiler low-hardness water, the constituent and parts by weight of the compound deoxygenation scale inhibitor are as follows: 10 parts -30 parts of phytic acid, 6 parts -18 parts of acetaldoxime, 12 parts -22 parts of 3 methoxypropyl amine, 15 parts -30 parts of sodium lignin sulfonate-copolymer-maleic anhydride, 5 parts -20 parts of hydroxyethylethylene diamine tri-acetic acid, 10 parts -40 parts of deionized water.The beneficial effects of the present invention are: the present invention can long term maintenance boiler use, by calcium and magnesium ion in water quality and other complexing of metal ion, is removed by filter filtering in system, reaches softened water purpose.With environmentally protective, the advantages of being easy to degrade, not generating secondary pollution after discharge.Boiler can be effectively reduced and carry out chemical cleaning number, indirectly reduce discharging of waste liquid, improve production efficiency, be conducive to environmental protection production.Scale-inhibiting properties of the present invention are excellent, and dissolved oxygen removal efficiency is high.
Description
Technical field
The present invention relates to water-treatment technology field more particularly to a kind of compound deoxygenation scale suppressions applied to boiler low-hardness water
Agent and preparation method thereof.
Background technique
At present using water as the type fixed steam boiler of medium and dual purpose steam water boiler (nominal outlet port steam pressure≤
2.5MPa) water quality requires to require to execute according to Industrial Boiler water quality (GB1576-2001), it is desirable that and middle total hardness≤
0.03mmol/L, dissolved oxygen≤0.1mg/L, but during actual industrial production, many enterprises are it is difficult to ensure that Industrial Boiler water
Matter is up to state standards, to the progress data comparison discovery of many enterprises' boiler: total hardness≤2mmol/L in water quality, and dissolved oxygen≤
1mg/L, in daily boiler maintenance, there are corrosion phenomenas for furnace wall, and there are different degrees of foulings for section of tubing, interface, generally
Processing scheme first carry out chemical cleaning, carry out pre-filming treatment, process time-consuming is relatively long, operate it is comparatively laborious, influence to give birth to
Produce operation.
The maintenance of boiler is the key that safe operation, once having gone out corrosion and fouling will slowly breed, and final
It can be carried out chemical cleaning, then carry out pre-filming treatment, will suitably be located in day-to-day operation for existing boiler water quality status
Reason inhibits corrosion and scaling, avoids boiler from carrying out blowing out chemical treatment, influences production run, so providing a kind of efficient compound
Deoxygenation scale inhibitor is very necessary.
Summary of the invention
The compound deoxygenation scale inhibitor and preparation method thereof that the object of the present invention is to provide a kind of applied to boiler low-hardness water,
Boiler frequent progress chemical cleaning is avoided, ensure that production safety is run, improve operational efficiency, itself belong to green ring
It protects, degradable type medicament, does not generate secondary pollution, the complexing agent is in boiler water quality condition (total hardness≤2mmol/L, dissolved oxygen
≤ 1mg/L) using having efficient scale inhibitor, there is softened water effect, deoxygenation is had excellent performance.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of compound deoxygenation scale inhibitor applied to boiler low-hardness water, the constituent of the compound deoxygenation scale inhibitor and
Parts by weight are as follows: 10 parts -30 parts of phytic acid, 6 parts -18 parts of acetaldoxime, 12 parts -22 parts of 3 methoxypropyl amine, sodium lignin sulfonate-horse
Come 15 parts -30 parts of acid anhydride copolymer, 5 parts -20 parts of hydroxyethylethylene diamine tri-acetic acid, 10 parts -40 parts of deionized water.
Sodium lignin sulfonate-the copolymer-maleic anhydride is using sodium lignin sulfonate as raw material, and maleic anhydride is monomer,
Sodium lignin sulfonate and maleic anhydride are 0.8-1.5:0.5-2 proportion in mass ratio, carry out graft copolymerization and obtain copolymer.
A kind of preparation method of the compound deoxygenation scale inhibitor applied to boiler low-hardness water, including following method:
1) prepare sodium lignin sulfonate-copolymer-maleic anhydride: using sodium lignin sulfonate as raw material, maleic anhydride is single
Body, ammonium persulfate are initiator, and the additive amount of ammonium persulfate is the 0.5%-4% of copolymer gross mass, sodium lignin sulfonate and
Maleic anhydride is matched by quality 0.8-1.5:0.5-2,40-60 DEG C of reaction temperature, reaction time 2-4h, carries out graft copolymerization
Obtain copolymer；
2) sodium lignin sulfonate-copolymer-maleic anhydride at room temperature obtaining step 1) is added to reaction kettle
In, then slowly phytic acid, 3 methoxypropyl amine, hydroxyethylethylene diamine tri-acetic acid, acetaldoxime, deionized water are added portionwise, it feeds
Temperature control at 40-60 DEG C and continues to stir in the process, after charging, nitrogen is passed through into reaction kettle, in confined conditions
It is warming up to 75-85 DEG C, soaking time is not less than 4h, then is stirred no less than 30min, is cooled to room temperature.
Phytic acid also known as inositol hexaphosphate, existing scale inhibition performance, and have rust inhibition, have the characteristics that natural, nontoxic, green ring
It protects, chemical property is stablized, in it and calcium and magnesium ion and other metal ions in terms of scale inhibition under the conditions of alkaline water quality, complexing
It has excellent performance, is capable of forming the flocculent deposit of loosely organized, non-sticky furnace wall, it can form one in metal surface in terms of inhibition
Layer is very thin and has fine and close organic phosphating coat, has excellent corrosion inhibition, and the content in complexing agent is 10 parts -30 parts,
It is preferred that 14 parts -26 parts.
Acetaldoxime is a kind of nontoxic boiler deoxidant, has deoxygenation speed fast, less developer, is discharged pollution-free etc. excellent
Point, it also has reproducibility simultaneously, the iron oxide in water, oxidation copper reduction can be played passivation, to inhibit equipment
Corrosion, content of the component in complexing agent are 6 parts -18 parts, preferably 8 parts -15 parts.
3 methoxypropyl amine is mainly used in steam boiler and condensate system, has deoxygenation and inhibition double action, energy
It is enough effectively carbon dioxide to be inhibited to give condensed water bring sour corrosion, it is compounded with acetaldoxime and deoxygenation and passivation effect can be improved, phase
Auxiliary to coordinate, the content in complexing agent is 12 parts -22 parts, preferably 15 parts -20 parts.
Sodium lignin sulfonate-copolymer-maleic anhydride is a kind of new copolymer obtained by graft copolymerization, it is inherited
The advantages of lignosulfonates and maleic anhydride, has many advantages, such as that chemical stability is strong, thermal stability is strong, easily biological-degradable,
Active group phenolic hydroxyl group, alcoholic extract hydroxyl group and the carboxylic acid group of formation can combine the metal ion in water, further improve
Anticorrosion-antiscaling property.Content in complexing agent is 15 parts -30 parts, preferably 18 parts -27 parts.
Hydroxyethylethylene diamine tri-acetic acid can effectively carry out copper and iron deposit clear suitable for the condition of water quality of the high PH of high temperature
It removes, and makes passivation of metal surfaces, resuming operation for the boiler corroded, it is obvious to act on, and the content in complexing agent can be 5
- 20 parts, preferably 8 parts -18 parts of part.
Compared with prior art, the beneficial effects of the present invention are:
1) boiler deoxidizing method scale inhibitor of the present invention can long term maintenance boiler use, can be by calcium and magnesium ion in water quality and other
Complexing of metal ion reaches softened water purpose by filter filtering removal in system.
2) boiler deoxidizing method scale inhibitor of the invention has environmentally protective, is easy to degrade, secondary pollution is not generated after discharge
Advantage.
3) boiler deoxidizing method scale inhibitor of the invention can effectively reduce boiler and carry out chemical cleaning number, indirectly reduce waste liquid
Discharge improves production efficiency, is conducive to environmental protection production.
4) treated that boiler water quality meets that Industrial Boiler water quality (GB1576-2001) is total for boiler deoxidizing method scale inhibitor of the present invention
Hardness≤0.03mmol/L, dissolved oxygen≤0.1mg/L requirement.
5) boiler deoxidizing method scale inhibitor scale-inhibiting properties of the present invention are excellent, and dissolved oxygen removal efficiency is high.
Specific embodiment
The present invention is described in detail below, it should be noted that implementation of the invention embodiment party not limited to the following
Formula.
A kind of compound deoxygenation scale inhibitor applied to boiler low-hardness water, the constituent of the compound deoxygenation scale inhibitor and
Parts by weight are as follows: 10 parts -30 parts of phytic acid, 6 parts -18 parts of acetaldoxime, 12 parts -22 parts of 3 methoxypropyl amine, sodium lignin sulfonate-horse
Come 15 parts -30 parts of acid anhydride copolymer, 5 parts -20 parts of hydroxyethylethylene diamine tri-acetic acid, 10 parts -40 parts of deionized water.
Sodium lignin sulfonate-the copolymer-maleic anhydride is using sodium lignin sulfonate as raw material, and maleic anhydride is monomer,
Sodium lignin sulfonate and maleic anhydride are 0.8-1.5:0.5-2 proportion in mass ratio, carry out graft copolymerization and obtain copolymer.
A kind of preparation method of the compound deoxygenation scale inhibitor applied to boiler low-hardness water, including following method:
1) prepare sodium lignin sulfonate-copolymer-maleic anhydride: using sodium lignin sulfonate as raw material, maleic anhydride is single
Body, ammonium persulfate are initiator, and the additive amount of ammonium persulfate is the 0.5%-4% of copolymer gross mass, sodium lignin sulfonate and
Maleic anhydride is matched by quality 0.8-1.5:0.5-2,40-60 DEG C of reaction temperature, reaction time 2-4h, carries out graft copolymerization
Obtain copolymer；
2) sodium lignin sulfonate-copolymer-maleic anhydride at room temperature obtaining step 1) is added to reaction kettle
In, then slowly phytic acid, 3 methoxypropyl amine, hydroxyethylethylene diamine tri-acetic acid, acetaldoxime, deionized water are added portionwise, it feeds
Temperature control at 40-60 DEG C and continues to stir in the process, after charging, nitrogen is passed through into reaction kettle, in confined conditions
It is warming up to 75-85 DEG C, soaking time is not less than 4h, then is stirred no less than 30min, is cooled to room temperature.
A kind of boiler deoxidizing method scale inhibitor each component applied to boiler low-hardness water of the invention is technical pure.
The features of the present invention is further illustrated below by embodiment.
Embodiment 1:
A kind of compound deoxygenation scale inhibitor applied to boiler low-hardness water, the constituent of the compound deoxygenation scale inhibitor and
Parts by weight are as follows: 10 parts of phytic acid, 18 parts of acetaldoxime, 15 parts of 3 methoxypropyl amine, sodium lignin sulfonate-copolymer-maleic anhydride 25
Part, 8 parts of hydroxyethylethylene diamine tri-acetic acid, 22 parts of deionized water.
Preparation method:
1) prepare sodium lignin sulfonate-copolymer-maleic anhydride: using sodium lignin sulfonate as raw material, maleic anhydride is single
Body, ammonium persulfate are initiator, and the additive amount of ammonium persulfate is the 0.5% of copolymer gross mass, sodium lignin sulfonate and Malaysia
Acid anhydrides is matched by quality 0.8:1.2,45 DEG C of reaction temperature, reaction time 3h, is carried out graft copolymerization and is obtained copolymer；
2) it will be prepared in the reaction kettle that sodium lignin sulfonate-copolymer-maleic anhydride is added at room temperature,
Slowly phytic acid, 3 methoxypropyl amine, hydroxyethylethylene diamine tri-acetic acid, acetaldoxime, deionized water are added portionwise, during charging
Temperature should control at 40 DEG C and continue to stir, and after charging, nitrogen is passed through into reaction kettle, is warming up to 85 in confined conditions
DEG C, after keeping the temperature 4h, it is stirred for 30min, both obtains product 1# after cooling.
Embodiment 2:
A kind of compound deoxygenation scale inhibitor applied to boiler low-hardness water, the constituent of the compound deoxygenation scale inhibitor and
Parts by weight are as follows: 22 parts of phytic acid, 15 parts of acetaldoxime, 12 parts of 3 methoxypropyl amine, sodium lignin sulfonate-copolymer-maleic anhydride 20
Part, 10 parts of hydroxyethylethylene diamine tri-acetic acid, 20 parts of deionized water.
Preparation method:
1) sodium lignin sulfonate-copolymer-maleic anhydride is prepared, using sodium lignin sulfonate as raw material, maleic anhydride is single
Body, ammonium persulfate are initiator, and the additive amount of ammonium persulfate is the 4% of copolymer gross mass, sodium lignin sulfonate and maleic acid
Acid anhydride is matched by quality 1:1,40 DEG C of reaction temperature, reaction time 4h, is carried out graft copolymerization and is obtained copolymer；
2) it will be prepared in the reaction kettle that sodium lignin sulfonate-copolymer-maleic anhydride is added at room temperature,
Slowly phytic acid, 3 methoxypropyl amine, hydroxyethylethylene diamine tri-acetic acid, acetaldoxime, deionized water are added portionwise, during charging
Temperature should control at 55 DEG C and continue to stir, and after charging, nitrogen is passed through into reaction kettle, is warming up to 75 in confined conditions
DEG C, after keeping the temperature 4h, it is stirred for 30min, both obtains product 2# after cooling.
Embodiment 3:
A kind of compound deoxygenation scale inhibitor applied to boiler low-hardness water, the constituent of the compound deoxygenation scale inhibitor and
Parts by weight are as follows: 10 parts of phytic acid, 8 parts of acetaldoxime, 22 parts of 3 methoxypropyl amine, sodium lignin sulfonate-copolymer-maleic anhydride 18
Part, 5 parts of hydroxyethylethylene diamine tri-acetic acid, deionized water: 30 parts.
Preparation method:
1) sodium lignin sulfonate-copolymer-maleic anhydride is prepared, using sodium lignin sulfonate as raw material, maleic anhydride is single
Body, ammonium persulfate are initiator, and the additive amount of ammonium persulfate is the 2% of copolymer gross mass, sodium lignin sulfonate and maleic acid
Acid anhydride is matched by quality 1.5:2,55 DEG C of reaction temperature, reaction time 3.5h, is carried out graft copolymerization and is obtained copolymer；
2) it will be prepared in the reaction kettle that sodium lignin sulfonate-copolymer-maleic anhydride is added at room temperature,
Slowly phytic acid, 3 methoxypropyl amine, hydroxyethylethylene diamine tri-acetic acid, acetaldoxime, deionized water are added portionwise, during charging
Temperature should control at 60 DEG C and continue to stir, and after charging, nitrogen is passed through into reaction kettle, is warming up to 80 in confined conditions
DEG C, after keeping the temperature 4h, it is stirred for 30min, both obtains product 3# after cooling.
Embodiment 4:
A kind of compound deoxygenation scale inhibitor applied to boiler low-hardness water, the constituent of the compound deoxygenation scale inhibitor and
Parts by weight are as follows: 30 parts of phytic acid, 6 parts of acetaldoxime, 18 parts of 3 methoxypropyl amine, sodium lignin sulfonate-copolymer-maleic anhydride 15
Part, 20 parts of hydroxyethylethylene diamine tri-acetic acid, 25 parts of deionized water.
Preparation method:
1) sodium lignin sulfonate-copolymer-maleic anhydride is prepared, using sodium lignin sulfonate as raw material, maleic anhydride is single
Body, ammonium persulfate are initiator, and the additive amount of ammonium persulfate is the 3% of copolymer gross mass, sodium lignin sulfonate and maleic acid
Acid anhydride is matched by quality 1:0.5,60 DEG C of reaction temperature, reaction time 4h, is carried out graft copolymerization and is obtained copolymer；
2) it will be prepared in the reaction kettle that sodium lignin sulfonate-copolymer-maleic anhydride is added at room temperature,
Slowly phytic acid, 3 methoxypropyl amine, hydroxyethylethylene diamine tri-acetic acid, acetaldoxime, deionized water are added portionwise, during charging
Temperature should control at 50 DEG C and continue to stir, and after charging, nitrogen is passed through into reaction kettle, is warming up to 75 in confined conditions
DEG C, after keeping the temperature 4h, it is stirred for 30min, both obtains product 4# after cooling.
By the boiler deoxidizing method scale inhibitor of above-described embodiment 1-4 according to " water-treating agent of boiler method of evaluating performance dynamic method "
(HG/T3924-2007) it is tested for the property result such as table 1:
Table 1: boiler deoxidizing method scale inhibitor the performance test results
Product 1#, 2#, 3#, 4# can be seen that treated that boiler water quality meets Industrial Boiler water quality by 1 result of table
(GB1576-2001) it requires, wherein 2# product is best, and scale inhibition performance and dissolved oxygen removal rate are 99% or more.
Claims (3)
1. a kind of compound deoxygenation scale inhibitor applied to boiler low-hardness water, which is characterized in that the compound deoxygenation scale inhibitor
Constituent and parts by weight are as follows: 10 parts -30 parts of phytic acid, 6 parts -18 parts of acetaldoxime, 12 parts -22 parts of 3 methoxypropyl amine, wooden
15 parts -30 parts of plain sodium sulfonate-copolymer-maleic anhydride, 5 parts -20 parts of hydroxyethylethylene diamine tri-acetic acid, 10 part -40 of deionized water
Part.
2. a kind of compound deoxygenation scale inhibitor applied to boiler low-hardness water according to claim 1, which is characterized in that institute
Stating sodium lignin sulfonate-copolymer-maleic anhydride is using sodium lignin sulfonate as raw material, and maleic anhydride is monomer, lignin sulfonic acid
Sodium and maleic anhydride are 0.8-1.5:0.5-2 proportion in mass ratio, carry out graft copolymerization and obtain copolymer.
3. a kind of preparation method applied to the compound deoxygenation scale inhibitor of boiler low-hardness water as claimed in claim 1 or 2,
It is characterized in that, including following method:
1) prepare sodium lignin sulfonate-copolymer-maleic anhydride: using sodium lignin sulfonate as raw material, maleic anhydride is monomer, mistake
Ammonium sulfate is that initiator, sodium lignin sulfonate and maleic anhydride are matched by quality 0.8-1.5:0.5-2,40-60 DEG C of reaction temperature,
Reaction time 2-4h carries out graft copolymerization and obtains copolymer；
2) sodium lignin sulfonate-copolymer-maleic anhydride at room temperature obtaining step 1) is added in reaction kettle, then
Slowly phytic acid, 3 methoxypropyl amine, hydroxyethylethylene diamine tri-acetic acid, acetaldoxime, deionized water are added portionwise, during charging
Temperature control is at 40-60 DEG C and continues to stir, and after charging, nitrogen is passed through into reaction kettle, is warming up in confined conditions
75-85 DEG C, soaking time is not less than 4h, then is stirred no less than 30min, is cooled to room temperature.
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| CN201910675666.XA CN110294538A (en) | 2019-07-25 | 2019-07-25 | A kind of compound deoxygenation scale inhibitor and preparation method thereof applied to boiler low-hardness water |
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Cited By (1)
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| CN111018028A (en) * | 2019-12-06 | 2020-04-17 | 南通联膦化工有限公司 | Environment-friendly boiler deoxidant |
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