CN106698687A - Compound scale and corrosion inhibitor and application thereof in treatment of circulating cooling water - Google Patents
Compound scale and corrosion inhibitor and application thereof in treatment of circulating cooling water Download PDFInfo
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- CN106698687A CN106698687A CN201510474291.2A CN201510474291A CN106698687A CN 106698687 A CN106698687 A CN 106698687A CN 201510474291 A CN201510474291 A CN 201510474291A CN 106698687 A CN106698687 A CN 106698687A
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Abstract
The invention relates to the fields of scale and corrosion inhibition and circulating water treatment, and discloses a compound scale and corrosion inhibitor; the compound scale and corrosion inhibitor contains water soluble chitosan and/or a derivative thereof, a plant natural high-molecular compound and/or a derivative thereof and polyaspartic acid and/or polyepoxysuccinic acid. In the compound scale and corrosion inhibitor, the weight ratio of water soluble chitosan and/or the derivative thereof to the plant natural high-molecular compound and/or the derivative thereof to polyaspartic acid and/or polyepoxysuccinic acid is (2-20) to (2-25) to (5-25). The invention also discloses an application of the compound scale and corrosion inhibitor in treatment of circulating cooling water. The compound scale and corrosion inhibitor provided by the invention has good scale and corrosion inhibition performance, is applied to the circulating cooling water, can meet the requirements of scale and corrosion inhibition of the circulating cooling water, and also can avoid environmental problems caused by phosphorus-containing drugs in phosphorus-containing circulating cooling water.
Description
Technical field
The present invention relates to scale inhibitor and circulating water treatment field, in particular it relates to a kind of composite scale is slow
Erosion agent and its application in circulating water cooling treatment.
Background technology
In recirculating cooling water system, fouling and etching problem are primarily present.In order to prevent scaling
And corrosion, current most convenient and effective method is that corrosion inhibiting and descaling agent is added in recirculated cooling water.Mesh
The preceding country is usually used in formula mostly the phosphine system formula, its host of the corrosion inhibiting and descaling agent of circulating water cooling treatment
It is phosphonate group (- PO3H2) corrosion inhibiting and descaling agent that is directly connected with carbon atom, often referred to as organic phospho acid.
Organic phospho acid have good chemical stability, not facile hydrolysis, can higher temperature resistant, and have inhibition concurrently
With scale inhibition dual-use function.However, as the increasingly stricter and phosphorus-containing compound of environmental regulation causes
Body eutrophication problem, such as in recent years, China's Coastal Areas occur frequently and on a large scale
Red tide causes huge disaster to aquaculture and natural, ecological.Therefore, it is right caused by phosphorus-containing compound
The pollution problem of water body makes people gradually recognize the importance of control phosphorus-containing compound discharge.So,
In the urgent need to a kind of without phosphorus environmental protection water treatment agent.
CN103031560A discloses a kind of recirculated water composite corrosion inhibitor, by mass parts by following components group
Into：Inorganic inhibitor 10-25 weight portions, 2- phosphonate group -1,2,4- tri carboxyl butane 1-5 weight portions, 2-
Acrylamide-2-methyl propane sulfonic 4-10 weight portions, lignin 5-10 weight portions, shitosan 10-15 weights
Amount part；Wherein, inorganic inhibitor is tungstates, molybdate or zinc salt.Have in the composite corrosion inhibitor
Machine phosphine, and base co-polymer containing sulfonic acid, the requirement to environmental protection are unfavorable.
The content of the invention
It is an object of the invention to provide a kind of composite scale-inhibiting corrosion inhibitor.The composite scale-inhibiting corrosion inhibitor is especially fitted
For recirculated cooling water.The composite scale-inhibiting corrosion inhibitor not only meets recirculated cooling water to scale inhibition and inhibition
It is required that, also solve the environmental problem that the phosphorous medicament in existing phosphorous recirculated cooling water causes.
The present inventor after research it was unexpectedly observed that by water soluble chitosan and/or its derivative,
Natural plant macromolecular compound and/or its derivative and poly-aspartate and/or poly-epoxy succinic acid are multiple
Corrosion-mitigation scale-inhibition synergistic effect can be obtained with use, so as to more fully play scale inhibition and the inhibition of each component
Effect, improves the corrosion-mitigation scale-inhibition effect of composite drug, the usage amount of single medicament is reduced, so as to complete
The present invention.
The invention provides a kind of composite scale-inhibiting corrosion inhibitor, the composite scale-inhibiting corrosion inhibitor contains water soluble shells and gathers
Sugar and/or its derivative, natural plant macromolecular compound and/or its derivative and poly-aspartate and/
Or poly-epoxy succinic acid.
Present invention also offers application of the above-mentioned composite scale-inhibiting corrosion inhibitor in circulating water cooling treatment.
The composite scale-inhibiting corrosion inhibitor that the present invention is provided has good scale inhibition and corrosion inhibition, is applied to follow
Ring cooling water, can not only meet recirculated cooling water to scale inhibition and the requirement of inhibition, can also avoid existing
There is the environmental problem that the phosphorous medicament in phosphorous recirculated cooling water causes.
Other features and advantages of the present invention will give specifically in subsequent specific embodiment part
It is bright.
Specific embodiment
Specific embodiment of the invention is described in detail below.It should be appreciated that this place
The specific embodiment of description is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The invention provides a kind of composite scale-inhibiting corrosion inhibitor, the composite scale-inhibiting corrosion inhibitor contains water soluble shells and gathers
Sugar and/or its derivative, natural plant macromolecular compound and/or its derivative and poly-aspartate and/
Or poly-epoxy succinic acid.
According to the present invention, in the composite scale-inhibiting corrosion inhibitor, water soluble chitosan and/or its derivative,
Natural plant macromolecular compound and/or its derivative and poly-aspartate and/or poly-epoxy succinic acid
Content can be in interior variation in a big way.Preferably, water soluble chitosan and/or its derivative, plant
The weight of natural polymer and/or its derivative and poly-aspartate and/or poly-epoxy succinic acid
Than for：(2-20)：(2-25)：(5-25), more preferably (3-16)：(5-20)：(8-20).
According to the present invention, the water soluble chitosan and/or its derivative are not particularly limited, Ke Yiwei
Water soluble chitosan commonly used in the art and/or its derivative.Preferably, the water soluble chitosan is de-
Acetyl degree is 75%-95%.The deacetylation refers to that the saccharide residue number of deacetylate in chitosan molecule is accounted for
The percentage of total saccharide residue number in chitosan molecule.
According to the present invention, the water-solubility chitosan derivative can be carboxymethyl chitosan and/or ethoxy
Shitosan.According to the present invention, the natural plant macromolecular compound and its derivative are not limited especially
It is fixed, can be natural plant macromolecular compound and its derivative commonly used in the art.Preferably, it is described
Natural plant macromolecular compound can be selected from least one in lignin, cellulose and tannin.It is preferred that
Ground, the derivative of the natural plant macromolecular compound can be selected from lignosulfonates, carboxymethyl wood
At least one in quality, carboxymethylcellulose calcium, hydroxyethyl cellulose and hydroxypropyl cellulose.
According to the present invention, in the composite scale-inhibiting corrosion inhibitor, when simultaneously containing poly-aspartate and polycyclic
During oxydisuccinic acid, the ratio of the two is not particularly limited.Preferably, the poly-aspartate and polycyclic oxygen
The weight ratio of butanedioic acid is 1：(0.5-2).
According to the present invention, the poly-aspartate is not particularly limited, can be commonly used in the art gathering
Aspartic acid.Preferably, the molecular weight of the poly-aspartate is 2500-3500.
According to the present invention, the poly-epoxy succinic acid is not particularly limited, can be commonly used in the art
Poly-epoxy succinic acid.Preferably, the molecular weight of the poly-epoxy succinic acid is 500-800.
According to the present invention, can also be containing heterocyclic compound as copper material in the composite scale-inhibiting corrosion inhibitor
Corrosion inhibiter.The heterocyclic compound can be mercaptobenzothiazoler and/or BTA.Relative to
The composite scale-inhibiting corrosion inhibitor of 100 weight portions, the content of the heterocyclic compound can be 0.5-2.0 weights
Amount part, preferably 0.8-1.5 weight portions.
According to the present invention, the composite scale-inhibiting corrosion inhibitor can also contain zinc salt.The zinc salt for example can be with
It is zinc sulfate and/or zinc chloride.Relative to the composite scale-inhibiting corrosion inhibitor of 100 weight portions, the zinc salt
Consumption with Zn2+Weight meter can be 0.5-2.0 weight portions, preferably 1.0-1.5 weight portions.
According to the present invention, the preparation method to the composite scale-inhibiting corrosion inhibitor is not particularly limited, can be with
It is any conventional preparation method in this area.When the composite scale-inhibiting corrosion inhibitor is prepared, each component
Charging sequence without especially limiting.The preparation method of the composite scale-inhibiting corrosion inhibitor for example can be with
For：Each composition is directly mixed together according to certain weight ratio.If the composite scale-inhibiting corrosion inhibitor
It is concentrated mother liquor, the preparation method of the composite scale-inhibiting corrosion inhibitor can be：By water soluble chitosan and/
Or derivatives thereof, natural plant macromolecular compound and/or its derivative, poly-aspartate and/or polycyclic
Oxydisuccinic acid, zinc salt (if any) and heterocyclic compound (if any) and suitable quantity of water are mixed
Close uniform, you can required composite scale-inhibiting corrosion inhibitor is obtained.Preferably, first by zinc salt (if any)
Being added to the water with heterocyclic compound (if any) makes its dispersing and dissolving, is subsequently adding natural plant high
Molecular compound and/or its derivative stirring and dissolving, add water soluble chitosan and/or its derivative is stirred
Dissolving is mixed, poly-aspartate is eventually adding and/or poly-epoxy succinic acid is stirred.
The invention further relates to application of the above-mentioned composite scale-inhibiting corrosion inhibitor in circulating water cooling treatment.
According to application of the present invention, the valid density of the water soluble chitosan and/or its derivative
Can be 2-20mg/L, preferably 3-16mg/L.The natural plant macromolecular compound and/or its spread out
Biological valid density can be 5-25mg/L, preferably 6-18mg/L.Poly-aspartate and/or polycyclic
The valid density of oxydisuccinic acid can be 4-15mg/L, preferably 4.5-9mg/L.Wherein, it is described effective
Concentration refer to the effective content of each composition in composite scale-inhibiting corrosion inhibitor (for example：The content of active material) with
The ratio of the volume of pending recirculated cooling water.
According to application of the present invention, if in recirculating cooling water system using there is equipment made of copper when, also
Can be to addition heterocyclic compound in recirculated cooling water as copper material corrosion inhibitor.The heterocyclic compound and upper
State identical.The valid density of the heterocyclic compound can be 0.5-1.5mg/L, preferably 0.8-1.2mg/L.
According to application of the present invention, can also be to adding zinc salt in recirculated cooling water.The zinc salt with
It is above-mentioned identical.The zinc salt is with Zn2+The valid density of meter can be 0.5-1.8mg/L, preferably
1.0-1.5mg/L。
According to application of the present invention, each composition in the composite scale-inhibiting corrosion inhibitor can be individually
Ground adds the valid density extremely needed in recirculated cooling water, it is also possible to each composition first is configured into composite scale
Corrosion inhibiter is subsequently adding in recirculated cooling water the valid density needed to each composition.
According to application of the present invention, the composite scale-inhibiting corrosion inhibitor is particularly suitable for processing calcium hardness
Be the medium hardness of 100-300mg/L with total alkalinity sum, moderate alkalinity water quality be not required to adjust pH value
Recirculated cooling water.
According to application of the present invention, when the composite scale-inhibiting corrosion inhibitor is used to process calcium hardness and total alkali
When degree sum is high rigidity, the high alkalinity recirculated cooling water of more than 300mg/L, to prevent fouling as far as possible,
It is general that pH value technique, i.e., the composite scale-inhibiting corrosion inhibitor for first adding the present invention to provide are adjusted using acid adding, then add
Enter acid to control the pH value of recirculated cooling water is 6.5-8.5 (preferably 7.8-8.3).The acid can be this
The conventional various acid in field, such as sulfuric acid and/or nitric acid.Now, inhibition problem should be to be solved important
Problem, in order to reach good corrosion inhibition, can be good containing having in the composite scale-inhibiting corrosion inhibitor
The zinc salt of corrosion inhibition.
According to application of the present invention, when the composite scale-inhibiting corrosion inhibitor is used to process calcium hardness and total alkali
When degree sum is soft, the low alkalinity recirculated cooling water of below 100mg/L, inhibition problem should be solved
Major issue certainly, in order to reach good corrosion inhibition, can contain in the composite scale-inhibiting corrosion inhibitor
Zinc salt with good corrosion inhibition.
The composite scale-inhibiting corrosion inhibitor that the present invention is provided shows good scale inhibitor combination property, applies
When recirculated cooling water, recirculated cooling water is met to scale inhibition and the requirement of inhibition, it is to avoid because making
The environmental problem caused with the phosphorous medicament in phosphorous recirculated cooling water.
Below will the present invention will be described in detail by specific embodiment.
In following examples and comparative example：
Carboxymethyl chitosan is purchased from Hubei Jian Yuan Chemical Co., Ltd.s, and deacetylation is 80%.
Hydroxyethyl chitosan is purchased from Qingdao Honghai Biotechnology Co., Ltd., and deacetylation is 90%.
Poly-aspartate is purchased from Luoyang Qiang Long limited companies, and molecular weight is 3000, and active material contains
It is 50 weight % to measure.
Poly-epoxy succinic acid is purchased from Shanghai Meijing Environmental Protection Materials Co., Ltd., and molecular weight is 800, active matter
Matter content is 50 weight %.
BTA is purchased from Tianjin recovery fine chemistry industry research institute.
In following examples and comparative example, the water quality of raw water is tested as shown in table 1, take experiment raw water and add
Calcium ion, makes the calcium hardness of experiment raw water 1 and 3 and total alkalinity concentrate 5 times as test water 1 and examination
Test with water 3, the calcium hardness of experiment raw water 2 and total alkalinity is concentrated 2 times as test water 2.
In table 1, calcium hardness, total alkalinity, total hardness are with CaCO3Meter.Calcium hardness is according to national standard
GB/T 6910-2006《Boiler feed water and cooling water analysis method calcium catalyst compleximetry》Survey
It is fixed；Total alkalinity is according to standard GB/T/T 15451-2006《Industrial circulating cooling water total alkali and phenolphthalein alkali
The measure of degree》Determine；Total hardness refers to Ca in water2+And Mg2+Total amount, according to GB/T 15452-2006
《The measure EDTA titrations of total hardness in industrial circulating cooling water》Determine；Cl-According to standard GB/T
15453-2008 is determined；SO4 2-Determined according to standard GB/T 14642-2009；PH value is according to standard
GB/T 6920-1986 are determined；Electrical conductivity is determined according to standard GB/T 6908-2008；It is total it is molten it is solid according to
Standard GB/T 14415-2007 are determined.
In table 1, pH is without unit；The unit of electrical conductivity is μ s/cm；Its counit is mg/L.
Table 1
| Experiment raw water | Calcium hardness | Total alkalinity | Total hardness | Cl- | SO4 2- | pH | Electrical conductivity | It is total molten solid |
| Experiment raw water 1 | 102 | 135 | 136 | 14 | 35 | 7.8 | 190 | 290 |
| Experiment raw water 2 | 235 | 370 | 323 | 66 | 110 | 7.5 | 995 | 706 |
| Experiment raw water 3 | 20 | 33 | 35 | 9 | 9 | 7.0 | 100 | 66 |
Embodiment 1
6.0g shitosans (deacetylation is 78%), 10.0g carboxymethyl lignin is weighed respectively (to be purchased from
Hui Xin Dehua, Tianjin chemical product sale Co., Ltd) and 18.0g poly-epoxy succinic acids (limit is viscous at 30 DEG C
Number is 0.078dl/g), add in 66.0g water, shake up, obtain composite scale-inhibiting corrosion inhibitor medicament stoste
S1。
Take in the composite scale-inhibiting corrosion inhibitor medicament stoste S1 addition 10L test waters 1 that 1g is prepared, make
In water shitosan (deacetylation is 78%), carboxymethyl lignin and poly-epoxy succinic acid it is effective dense
Degree is respectively 6mg/L, 10mg/L and 9mg/L, then carries out resistance carbonic acid according to the method in test case
Calcium dirt performance measurement and corrosion inhibition are determined.
Embodiment 2
3.14g zinc chloride are weighed, (Limiting Viscosity is at 30 DEG C to be dissolved in 9.0g poly-aspartates
In 0.074dl/g), it is subsequently adding 3.0g carboxymethyl chitosans and 18.0g carboxymethylcellulose calciums (is purchased from
Hebei Renqiu City gold leaf Industrial Co., Ltd), 46.86g water is added, shake up, obtain composite scale
Corrosion inhibiter medicament stoste S2.
Take the composite scale-inhibiting corrosion inhibitor medicament stoste S2 that 0.8g prepares add 10L test waters 2 or
In 10L test waters 3 so that carboxymethyl chitosan, carboxymethylcellulose calcium, poly-aspartate in water
3mg/L, 18mg/L, 4.5mg/L and 1.5mg/L are respectively with the valid density of zinc ion, then
Carry out hindering calcium carbonate scale performance measurement according to the method in test case.
The pH value of test water 2 is adjusted to 7.8-8.3 with sulfuric acid, composite scale-inhibiting corrosion inhibitor is subsequently adding
Medicament stoste S2, corrosion inhibition measure is carried out according still further to the method in test case.For test water
3, composite scale-inhibiting corrosion inhibitor medicament stoste 2 is directly added into, carry out inhibition according still further to the method in test case
Performance measurement.
Embodiment 3
0.16g hydroxyethyl chitosans, 60.0mg sodium lignin sulfonates (are purchased from Jinan Liang Feng trades respectively
Easy company of Co., Ltd), 0.12g poly-aspartates (Limiting Viscosity is 0.079dl/g at 30 DEG C) and
10.0mg BTAs are added in 10L test waters 1 so that hydroxyethyl chitosan, wood in water
The valid density of quality sodium sulfonate, poly-aspartate and BTA be respectively 16mg/L,
6mg/L, 6mg/L and 1mg/L, then carry out resistance calcium carbonate scale performance and survey according to the method in test case
Fixed and corrosion inhibition is determined.
Embodiment 4
1g BTAs are weighed, (Limiting Viscosity is at 30 DEG C to be dissolved in 12g poly-aspartates
In 0.079dl/g), it is subsequently adding 16.0g hydroxyethyl chitosans and 6.0g sodium lignin sulfonates (is purchased from
Jinan company of Liang Feng trade Co., Ltds), 85g water is added, shake up, obtain composite scale inhibition
Agent medicament stoste S3.
Take during the composite scale-inhibiting corrosion inhibitor medicament stoste S3 that 1.2g prepares adds 10L test waters 1,
So that hydroxyethyl chitosan, sodium lignin sulfonate, poly-aspartate and BTA have in water
Effect concentration is respectively 16mg/L, 6mg/L, 6mg/L and 1mg/L, then according to the method in test case
Carry out resistance calcium carbonate scale performance measurement and corrosion inhibition is determined.
Embodiment 5
8.0g shitosans (deacetylation is 90%), 10.0g hydroxyethyl celluloses is weighed respectively (to be purchased from
Hebei Renqiu City gold leaf Industrial Co., Ltd) and 18.0g poly-epoxy succinic acids (Limiting Viscosity is at 30 DEG C
0.082dl/g), add in 64g water, shake up, obtain composite scale-inhibiting corrosion inhibitor medicament stoste S4.
Take during the composite scale-inhibiting corrosion inhibitor medicament stoste S4 that 1.0g prepares adds 10L test waters 1,
So that in water shitosan (deacetylation is 90%), hydroxyethyl cellulose and poly-epoxy succinic acid it is effective
Concentration is respectively 8mg/L, 10mg/L and 9mg/L, then carries out resistance carbon according to the method in test case
Sour calcium dirt performance measurement and corrosion inhibition are determined.
Embodiment 6
3.0g shitosans (deacetylation is 70%), 24.0g hydroxypropyl celluloses is weighed respectively (to be purchased from
Hebei Renqiu City gold leaf Industrial Co., Ltd) and 18.0g poly-epoxy succinic acids (Limiting Viscosity is at 30 DEG C
0.075dl/g), add in 55g water, shake up, obtain composite scale-inhibiting corrosion inhibitor medicament stoste S5.
Take during the composite scale-inhibiting corrosion inhibitor medicament stoste S5 that 1.0g prepares adds 10L test waters 1,
So that in water the valid density of shitosan, hydroxypropyl cellulose and poly-epoxy succinic acid be respectively 3mg/L,
24mg/L and 9mg/L, then carries out the performance measurement of resistance calcium carbonate scale and eases up according to the method in test case
Erosion performance measurement.
Embodiment 7
3.6g carboxymethyl chitosans, 4.0g carboxymethyls lignin are weighed respectively (purchased from Hui Xin Dehua, Tianjin
Chemical product sells Co., Ltd) and 12.0g poly-aspartates (Limiting Viscosity is 0.069dl/g at 30 DEG C)
With 12g poly-epoxy succinic acids (Limiting Viscosity is 0.065dl/g at 30 DEG C), add in 68.4g water, shake
It is even, obtain composite scale-inhibiting corrosion inhibitor medicament stoste S6.
Take during the composite scale-inhibiting corrosion inhibitor medicament stoste S6 that 1.0g prepares adds 10L test waters 1,
So that carboxymethyl chitosan, carboxymethyl lignin, poly-aspartate and poly-epoxy succinic acid have in water
Effect concentration is respectively 3.6mg/L, 4mg/L, 6mg/L and 6mg/L, then according to the method in test case
Carry out resistance calcium carbonate scale performance measurement and corrosion inhibition is determined.
Comparative example 1
(Limiting Viscosity is at 30 DEG C to weigh 8.0g carboxymethyl chitosans and 24.0g poly-aspartates respectively
0.069dl/g), add in 68g water, shake up, obtain medicament stoste D1.
Take during the 1.0g medicament stostes D1 for preparing adds 10L test waters 1 so that carboxymethyl in water
The valid density of shitosan and poly-aspartate is respectively 8mg/L and 12mg/L, then according to test case
In method carry out resistance calcium carbonate scale performance measurement and corrosion inhibition determine.
Comparative example 2
4.0g hydroxyethyl chitosans and 10.0g lignosulfonates are weighed respectively, in addition 86g water,
Shake up, obtain medicament stoste D2.
Take during the 1.0g medicament stostes D2 for preparing adds 10L test waters 1 so that ethoxy in water
The valid density of shitosan and lignosulfonates is respectively 4mg/L and 10mg/L, then according to test
Method in example carries out resistance calcium carbonate scale performance measurement and corrosion inhibition is determined.
Comparative example 3
8.0g carboxymethyl chitosans are weighed, is added in 92g water, shaken up, obtain medicament stoste D3.
Take during the 1.0g medicament stostes D3 for preparing adds 10L test waters 1 so that carboxymethyl in water
The valid density of shitosan is 8mg/L, then carries out hindering calcium carbonate scale performance according to the method in test case
Determine and corrosion inhibition is determined.
Comparative example 4
10.0g hydroxyethyl celluloses and 18.0g poly-epoxy succinic acids (Limiting Viscosity at 30 DEG C are weighed respectively
It is 0.078dl/g), add in 72g water, shake up, obtain medicament stoste D4.
Take during the 1.0g medicament stostes D4 for preparing adds 10L test waters 1 so that ethoxy in water
The valid density of cellulose and poly-epoxy succinic acid is respectively 10mg/L and 9mg/L, then according to test
Method in example carries out resistance calcium carbonate scale performance measurement and corrosion inhibition is determined.
Test case
This test case is used to the resistance of the composite scale-inhibiting corrosion inhibitor for evaluating embodiment 1-7 and comparative example 1-4
Dirty corrosion inhibition.
" blank sample " is represented and is not added with composite scale-inhibiting corrosion inhibitor, but other process steps and experiment (or survey
Examination) step identical test water sample.
(1) calcium carbonate scale performance measurement method is hindered：
The test water that medicament will have been added in each embodiment and comparative example is adopted in 80 ± 1 DEG C of waters bath with thermostatic control
10h is stood with volumetric flask method, after cooling residue Ca in sampling analysis water2+Concentration, while doing blank
Sample, and calculate scale inhibition performance.The results are shown in Table 2.
The definition of scale inhibition performance is the scale inhibition efficiency of corrosion inhibiting and descaling agent, and the computing formula of scale inhibition performance is：
Scale inhibition performance=(C-C0)/(nC1-C0) × 100%, wherein,
C：Residue Ca in water after cooling2+Concentration (mg/L)
C0：The Ca of blank sample2+Concentration (mg/L)
C1：Ca in raw water2+Concentration (mg/L)
n：The cycles of concentration of experiment raw water calcium hardness and total alkalinity
(2) corrosion inhibition assay method：
20# quality carbon steel test pieces are fixed on lacing film instrument, then by test piece be completely immersed in each embodiment and
Comparative example has been added in the test water of medicament, and steady temperature is 40 ± 1 DEG C, and holding rotating speed is 75rpm
Rotation 72h, the weight of test piece, calculates average corrosion rate before and after record experiment.The results are shown in Table 2.
The definition of average corrosion rate is the inhibition efficiency of corrosion inhibiting and descaling agent, average corrosion rate (F)
Computing formula is：
F=(C × △ W)/(A × T × ρ), wherein,
C：Computational constant, during with mm/a (millimeter/year) for unit, C=8.76 × 107mm/a
△W：The corrosion weight loss (g) of test specimen
A：Area (the cm of test specimen2)
T：Corrosion test time (h)
ρ：Density (the kg/m of material for test3), ρ=7.85 × 103kg/m3
Table 2
The composite scale-inhibiting corrosion inhibitor that can be seen that present invention offer from the data in table 2 has good
Comprehensive scale inhibition and corrosion inhibition.Specifically, it not only has excellent resistance CaCO3Dirty function, also
Good corrosion inhibition, disclosure satisfy that recirculated cooling water to scale inhibition and the requirement of inhibition.
Claims (10)
1. a kind of composite scale-inhibiting corrosion inhibitor, it is characterised in that the composite scale-inhibiting corrosion inhibitor contains water solubility
Shitosan and/or its derivative, natural plant macromolecular compound and/or its derivative and poly- asparagus fern ammonia
Acid and/or poly-epoxy succinic acid.
2. composite scale-inhibiting corrosion inhibitor according to claim 1, wherein, water soluble chitosan and/or
Its derivative：Natural plant macromolecular compound and/or its derivative：Poly-aspartate and/or polycyclic oxygen
The weight ratio of butanedioic acid is：(2-20)：(2-25)：(5-25), preferably (3-16)：(5-20)：(8-20).
3. composite scale-inhibiting corrosion inhibitor according to claim 1 and 2, wherein, the water soluble shells
The deacetylation of glycan is 75%-95%；The water-solubility chitosan derivative be carboxymethyl chitosan and/
Or hydroxyethyl chitosan.
4. composite scale-inhibiting corrosion inhibitor according to claim 1 and 2, wherein, the natural plant
Macromolecular compound is selected from least one in lignin, cellulose and tannin；The natural plant high score
The derivative of sub- compound is selected from lignosulfonates, carboxymethyl lignin, carboxymethylcellulose calcium, hydroxyl
At least one in ethyl cellulose and hydroxypropyl cellulose.
5. composite scale-inhibiting corrosion inhibitor according to claim 1 and 2, wherein, the composite scale
Corrosion inhibiter also contains heterocyclic compound；
Preferably, the heterocyclic compound is mercaptobenzothiazoler and/or BTA；
Preferably, relative to the composite scale-inhibiting corrosion inhibitor of 100 weight portions, the heterocyclic compound
Content is 0.5-2.0 weight portions, preferably 0.8-1.5 weight portions.
6. composite scale-inhibiting corrosion inhibitor according to claim 1 and 2, wherein, the composite scale
Corrosion inhibiter also contains zinc salt；
Preferably, the zinc salt is zinc sulfate and/or zinc chloride；
Preferably, relative to the composite scale-inhibiting corrosion inhibitor of 100 weight portions, the consumption of the zinc salt with
Zn2+Weight be calculated as 0.5-2.0 weight portions, preferably 1.0-1.5 weight portions.
7. the composite scale-inhibiting corrosion inhibitor in claim 1-6 described in any one is in circulating water cooling treatment
In application.
8. application according to claim 7, wherein, water soluble chitosan and/or its derivative
Valid density is 2-20mg/L, preferably 3-16mg/L；Natural plant macromolecular compound and/or its spread out
Biological valid density is 5-25mg/L, preferably 6-18mg/L；Poly-aspartate and/or polycyclic oxygen amber
The valid density of amber acid is 4-15mg/L, preferably 4.5-9mg/L.
9. the application according to claim 7 or 8, wherein, when the composite scale-inhibiting corrosion inhibitor contains
During heterocyclic compound, the valid density of the heterocyclic compound is 0.5-1.5mg/L, preferably
0.8-1.2mg/L；
Preferably, the heterocyclic compound is mercaptobenzothiazoler and/or BTA.
10. the application according to claim 7 or 8, wherein, when the composite scale-inhibiting corrosion inhibitor contains
When having zinc salt, the zinc salt is with Zn2+The valid density of meter is 0.5-1.8mg/L, preferably 1.0-1.5mg/L；
Preferably, the zinc salt is zinc sulfate and/or zinc chloride.
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| CN201510474291.2A CN106698687A (en) | 2015-08-05 | 2015-08-05 | Compound scale and corrosion inhibitor and application thereof in treatment of circulating cooling water |
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| CN (1) | CN106698687A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109319951A (en) * | 2018-11-29 | 2019-02-12 | 河南省科学院能源研究所有限公司 | A kind of environment-protective circulating water antisludging agent |
| CN111777200A (en) * | 2020-07-17 | 2020-10-16 | 陕西津阳水处理股份有限公司 | Scale and corrosion inhibitor for water treatment |
| CN112646554A (en) * | 2019-10-12 | 2021-04-13 | 中国石油化工股份有限公司 | Cooling liquid for food processing equipment and preparation method thereof |
| CN113684483A (en) * | 2021-08-26 | 2021-11-23 | 常州市武进盛源化工有限公司 | Zinc chloride compound corrosion inhibitor for circulating cooling water and preparation method thereof |
| CN114084969A (en) * | 2021-11-16 | 2022-02-25 | 常州市武进盛源化工有限公司 | Cooling water scale inhibitor and application thereof |
| CN114436412A (en) * | 2022-02-18 | 2022-05-06 | 自然资源部第二海洋研究所 | Preparation method and application of green ternary scale and corrosion inhibitor |
| CN116969611A (en) * | 2023-09-22 | 2023-10-31 | 杭州尚善若水环保科技有限公司 | Corrosion and scale inhibition mixture and application thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109319951A (en) * | 2018-11-29 | 2019-02-12 | 河南省科学院能源研究所有限公司 | A kind of environment-protective circulating water antisludging agent |
| CN109319951B (en) * | 2018-11-29 | 2021-06-04 | 河南省科学院能源研究所有限公司 | Environment-friendly circulating water scale inhibitor |
| CN112646554A (en) * | 2019-10-12 | 2021-04-13 | 中国石油化工股份有限公司 | Cooling liquid for food processing equipment and preparation method thereof |
| CN112646554B (en) * | 2019-10-12 | 2022-06-07 | 中国石油化工股份有限公司 | Cooling liquid for food processing equipment and preparation method thereof |
| CN111777200A (en) * | 2020-07-17 | 2020-10-16 | 陕西津阳水处理股份有限公司 | Scale and corrosion inhibitor for water treatment |
| CN113684483A (en) * | 2021-08-26 | 2021-11-23 | 常州市武进盛源化工有限公司 | Zinc chloride compound corrosion inhibitor for circulating cooling water and preparation method thereof |
| CN114084969A (en) * | 2021-11-16 | 2022-02-25 | 常州市武进盛源化工有限公司 | Cooling water scale inhibitor and application thereof |
| CN114436412A (en) * | 2022-02-18 | 2022-05-06 | 自然资源部第二海洋研究所 | Preparation method and application of green ternary scale and corrosion inhibitor |
| CN116969611A (en) * | 2023-09-22 | 2023-10-31 | 杭州尚善若水环保科技有限公司 | Corrosion and scale inhibition mixture and application thereof |
| CN116969611B (en) * | 2023-09-22 | 2024-01-23 | 杭州尚善若水环保科技有限公司 | Corrosion and scale inhibition mixture and application thereof |
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