CN105502698B - A kind of composite scale-inhibiting corrosion inhibitor and its application in circulating water cooling treatment - Google Patents
A kind of composite scale-inhibiting corrosion inhibitor and its application in circulating water cooling treatment Download PDFInfo
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Abstract
The invention discloses a kind of composite scale-inhibiting corrosion inhibitor, which contains Carboxymethylinulin, multi-hydroxy carboxy acid's salt and poly-aspartate and/or poly-epoxy succinic acid.In the composite scale-inhibiting corrosion inhibitor, Carboxymethylinulin：Multi-hydroxy carboxy acid's salt：The weight ratio of poly-aspartate and/or poly-epoxy succinic acid can be：(12-100)：(2-25)：(5-25).The invention also discloses application of the above-mentioned composite scale-inhibiting corrosion inhibitor in circulating water cooling treatment.Composite scale-inhibiting corrosion inhibitor provided by the invention shows good scale inhibitor comprehensive performance, when applied to recirculated cooling water, it not only can satisfy requirement of the recirculated cooling water to scale inhibition and inhibition, environmental problem caused by the phosphorous medicament in existing phosphorous recirculated cooling water can also be avoided.
Description
Technical field
The present invention relates to scale inhibitors and circulating water treatment field, and in particular, to a kind of composite scale-inhibiting corrosion inhibitor and its
Application in circulating water cooling treatment.
Background technique
In recirculating cooling water system, it is primarily present fouling and etching problem.Scaling and corrosion in order to prevent, at present
Most convenient and effective method is that corrosion inhibiting and descaling agent is added in recirculated cooling water.The country is usually used in circulating water cooling treatment at present
Corrosion inhibiting and descaling agent formula be mostly phosphine system formula, host agent be phosphonic acid base (- PO3H2) be directly connected with carbon atom inhibition resistance
Dirty agent, often referred to as organic phospho acid.Organic phospho acid have good chemical stability, not facile hydrolysis, can higher temperature resistant, and it is simultaneous
Have inhibition and scale inhibition dual function.However, with environmental regulation be increasingly stringenter and phosphorus-containing compound caused by water body it is rich
Nutrient laden problem, such as in recent years, China's Coastal Areas is frequently and the red tide that occurs on a large scale is given birth to aquaculture and naturally
State causes huge disaster.Therefore, people are made gradually to recognize that control contains the pollution problem of water body caused by phosphorus-containing compound
The importance of phosphorus compound discharge.So there is an urgent need to a kind of phosphate-free water treatment agents.
Carboxymethylinulin (CMI) be by inulin molecules primary alconol or secondary alcohol groups and monoxone etc. containing carboxylic group (-
COOH compound) occurs substitution reaction under alkaline condition and is formed.The research of Carboxymethylinulin start from the 1990s,
In terms of concentrating on the synthesis of Carboxymethylinulin and the research of scale-inhibiting properties.Data shows that CMI can be dropped in the biology of holding inulin
New function is increased on the basis of the characteristics such as solution, renewable, nontoxic, may be used as antisludging agent or heavy metal ion chelating agent.
It can inhibit CaCO in sugar industry3Crystallization is used as the additive etc. for removing pollutant in dyeing process.
Liu Ke face《The research of Carboxymethylinulin》Using inulin as raw material, pass through the list of the preparation process to Carboxymethylinulin
Factor Experiment and orthogonal experiment research, analyze influence of each single factor test to synthetic product Carboxymethylinulin degree of substitution, have found
Prepare the optimum process condition of Carboxymethylinulin.
《The synthesis and application study of Carboxymethylinulin are in progress》(Luo Yi, Yuan Songdong, Hu Kunpeng, Xiong Kun, Lu Meng food work
Industry science and technology 2012,33 (19)) point out that Carboxymethylinulin is a kind of excellent antisludging agent and anti-redeposition agents, in low-down concentration
It just can effectively prevent calcium ion under (0.1~200ppm) to crystallize in the form of carbonate, oxalates or sulfate, it is alternative
The phosphorus system of the high rigidity aqueous systems such as PBTCA (2- phosphonic acid base -1,2,4- butane tricarboxylate) and HEDP (1-hydroxy ethylidene-1,1-diphosphonic acid) hinders
Dirty agent, for handling industrial circulating cooling water or industrial wastewater.
Existing literature does not have the research of Carboxymethylinulin corrosion inhibition and compounds to form compound slow corrosion with other water treatment agents
Antisludging agent is applied to the research of circulating water cooling treatment.
Summary of the invention
The purpose of the present invention is to provide a kind of composite scale-inhibiting corrosion inhibitors.The composite scale-inhibiting corrosion inhibitor is particularly suitable for recycling
Cooling water.The composite scale-inhibiting corrosion inhibitor not only meets requirement of the recirculated cooling water to scale inhibition and inhibition, also solves existing contain
Environmental problem caused by phosphorous medicament in phosphorus recirculated cooling water.
The present inventor after studying it was unexpectedly observed that Carboxymethylinulin have corrosion inhibition, by Carboxymethylinulin,
Multi-hydroxy carboxy acid's salt and poly-aspartate and/or poly-epoxy succinic acid, which are used in compounding, can obtain corrosion-mitigation scale-inhibition synergistic effect,
To more fully play the scale inhibition and corrosion inhibition of Carboxymethylinulin, the corrosion-mitigation scale-inhibition effect of composite drug is improved, is reduced single
The usage amount of one medicament, so as to complete the present invention.
The present invention provides a kind of composite scale-inhibiting corrosion inhibitor, which contains Carboxymethylinulin, polyhydroxy
Carboxylate and poly-aspartate and/or poly-epoxy succinic acid.
The present invention also provides application of the above-mentioned composite scale-inhibiting corrosion inhibitor in circulating water cooling treatment.
Composite scale-inhibiting corrosion inhibitor provided by the invention has good scale inhibition and corrosion inhibition, is applied to recirculated cooling water,
It not only can satisfy requirement of the recirculated cooling water to scale inhibition and inhibition, can also avoid phosphorous in existing phosphorous recirculated cooling water
Environmental problem caused by medicament.
The following detailed description will be given in the detailed implementation section for other features and advantages of the present invention.
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention provides a kind of composite scale-inhibiting corrosion inhibitor, which contains Carboxymethylinulin, polyhydroxy
Carboxylate and poly-aspartate and/or poly-epoxy succinic acid.
According to the present invention, in the composite scale-inhibiting corrosion inhibitor, Carboxymethylinulin, multi-hydroxy carboxy acid's salt and poly- asparagus fern ammonia
The content of acid and/or poly-epoxy succinic acid can change in a big way.Preferably, Carboxymethylinulin：Multi-hydroxy carboxy acid
Salt：The weight ratio of poly-aspartate and/or poly-epoxy succinic acid can be：(12-100)：(2-25)：(5-25), it is further excellent
It is selected as (15-80)：(5-20)：(8-20).
According to the present invention, in the composite scale-inhibiting corrosion inhibitor, when simultaneously contain poly-aspartate and poly-epoxy succinic acid
When, the ratio of the two is not particularly limited.Preferably, the weight ratio of the poly-aspartate and poly-epoxy succinic acid is 1：
(0.5-2)。
According to the present invention, the degree of substitution of the Carboxymethylinulin can be 0.3~1.2, preferably 0.6~1.0.It is described to take
Refer to the degree of inulin carboxymethylation reaction for degree, table is come with the substituted quantity of hydroxyl in averagely each fructofuranose unit
Show, each fructofuranose unit there are 3 hydroxyls, therefore degree of substitution is up to 3.
According to the present invention, multi-hydroxy carboxy acid's salt is not particularly limited, can is polyhydroxy carboxylic commonly used in the art
Hydrochlorate.Preferably, multi-hydroxy carboxy acid's salt is selected from sylvite, sodium salt or the potassium of citric acid, tartaric acid, gluconic acid and humic acid
At least one of sodium double salt.It is further preferred that multi-hydroxy carboxy acid's salt is selected from sodium citrate, sodium tartrate, glucose
At least one of sour sodium and sodium humate.
According to the present invention, the poly-aspartate is not particularly limited, can is poly-aspartate commonly used in the art.
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 is polycyclic oxygen amber commonly used in the art
Amber acid.Preferably, the molecular weight of the poly-epoxy succinic acid is 500-800.
According to the present invention, heterocyclic compound can also be contained in the composite scale-inhibiting corrosion inhibitor as copper material corrosion inhibitor.Institute
Stating heterocyclic compound can be mercaptobenzothiazoler and/or benzotriazole.The composite scale relative to 100 parts by weight is slow
Agent is lost, the content of the heterocyclic compound can be 0.5-2.0 parts by weight, preferably 0.8-1.5 parts by weight.
According to the present invention, the composite scale-inhibiting corrosion inhibitor can also contain zinc salt.The zinc salt for example can be zinc sulfate
And/or zinc chloride.Relative to the composite scale-inhibiting corrosion inhibitor of 100 parts by weight, the dosage of the zinc salt is with Zn2+Poidometer can
Think 0.5-2.0 parts by weight, preferably 1.0-1.5 parts by weight.
According to the present invention, the preparation method of the composite scale-inhibiting corrosion inhibitor is not particularly limited, can is this field
Any conventional preparation method.When preparing the composite scale-inhibiting corrosion inhibitor, the charging sequence of each component is without special
Ground limits.The preparation method of the composite scale-inhibiting corrosion inhibitor for example can be directly to mix each ingredient according to certain weight ratio
Together.If the composite scale-inhibiting corrosion inhibitor is concentrated mother liquor, the preparation method of the composite scale-inhibiting corrosion inhibitor can be：It will
Carboxymethylinulin, multi-hydroxy carboxy acid's salt, poly-aspartate and/or poly-epoxy succinic acid, zinc salt (if any) and jeterocyclic chemistry
It closes object (if any) and suitable quantity of water is uniformly mixed, can be prepared by required composite scale-inhibiting corrosion inhibitor.Preferably, first by zinc
Salt (if any) and heterocyclic compound (if any), which are added to the water, makes its dispersing and dissolving, and multi-hydroxy carboxy acid is then added
Salt stirring and dissolving adds Carboxymethylinulin stirring and dissolving, is eventually adding poly-aspartate and/or poly-epoxy succinic acid stirring is equal
It is even.
The invention further relates to application of the above-mentioned composite scale-inhibiting corrosion inhibitor in circulating water cooling treatment.
Application according to the present invention, the effective concentration of Carboxymethylinulin can be 2-20mg/L, preferably 3-16mg/
L.The effective concentration of multi-hydroxy carboxy acid's salt can be 5-20mg/L, preferably 6-18mg/L.Poly-aspartate and/or polycyclic oxygen amber
The effective concentration of amber acid can be 4-15mg/L, preferably 4.5-9mg/L.Wherein, the effective concentration refers to that composite scale is slow
Lose agent in each ingredient effective content (such as：The content of active material) ratio with the volume of recirculated cooling water to be processed.
Application according to the present invention, if in recirculating cooling water system using there is equipment made of copper when, can also be to following
Heterocyclic compound is added in ring cooling water as copper material corrosion inhibitor.The heterocyclic compound and above-mentioned identical.The heterocyclic compound
The effective concentration of object can be 0.5-1.5mg/L, preferably 0.8-1.2mg/L.
Zinc salt can also be added in application according to the present invention into recirculated cooling water.The zinc salt is same as described above.
The zinc salt is with Zn2+The effective concentration of meter can be 0.5-1.8mg/L, preferably 1.0-1.5mg/L.
Application according to the present invention, each ingredient in the composite scale-inhibiting corrosion inhibitor, which can separately be added, to follow
To the effective concentration needed in ring cooling water, each ingredient first can also being configured to composite scale-inhibiting corrosion inhibitor, then addition circulation is cold
But to the effective concentration that each ingredient needs in water.
Application according to the present invention, the composite scale-inhibiting corrosion inhibitor is particularly suitable for processing calcium hardness and total alkalinity
The sum of for the medium hardness of 100-300mg/L, moderate alkalinity water quality the recirculated cooling water for being not required to adjust pH value.
Application according to the present invention, when the composite scale-inhibiting corrosion inhibitor is for handling the sum of calcium hardness and total alkalinity
When the high rigidity of 300mg/L or more, high alkalinity recirculated cooling water, to prevent fouling as far as possible, acid adding tune pH value technique is generally used,
Composite scale-inhibiting corrosion inhibitor provided by the invention is first added, adding acid control pH value is 6.5-8.5 (preferably 7.8-8.3).
The acid can be various acid commonly used in the art, such as sulfuric acid and/or nitric acid.At this point, inhibition problem should be the weight to be solved
Problem is wanted, in order to reach good corrosion inhibition, can be contained in the composite scale-inhibiting corrosion inhibitor with good corrosion inhibition
Zinc salt.
Application according to the present invention, when the composite scale-inhibiting corrosion inhibitor is for handling the sum of calcium hardness and total alkalinity
When 100mg/L soft below, low alkalinity recirculated cooling water, inhibition problem should be the major issue to be solved, in order to reach
Good corrosion inhibition can contain the zinc salt with good corrosion inhibition in the composite scale-inhibiting corrosion inhibitor.
Composite scale-inhibiting corrosion inhibitor provided by the invention shows good scale inhibitor comprehensive performance, is applied to circulating cooling
When water, requirement of the recirculated cooling water to scale inhibition and inhibition is met, is avoided because using phosphorous in phosphorous recirculated cooling water
Environmental problem caused by medicament.
It below will the present invention will be described in detail by specific embodiment.
In following embodiment and comparative example：
Carboxymethylinulin is purchased from U.S. Carbomer company, and activity substance content is 20 weight %.
Poly-aspartate is purchased from Luoyang Qiang Long limited liability company, molecular weight 3000, and activity substance content is 50 weights
Measure %.
Poly-epoxy succinic acid is purchased from Shanghai Meijing Environmental Protection Materials Co., Ltd., molecular weight 800, activity substance content 50
Weight %.
Benzotriazole recovers fine chemistry industry research institute purchased from Tianjin.
In following embodiment and comparative example, the water quality for testing raw water is as shown in table 1, takes test raw water to add calcium ion, makes
The calcium hardness and total alkalinity for testing raw water 1 and 3 are concentrated 5 times and are used as test water 1 and test water 3, keep the calcium for testing raw water 2 hard
Degree and total alkalinity are concentrated 2 times and are used as test water 2.
In table 1, calcium hardness, total alkalinity, total hardness are with CaCO3Meter.Calcium hardness GB/T 6910- according to national standards
2006《Boiler feed water and cooling water analysis method calcium catalyst compleximetry》Measurement；Total alkalinity GB/T according to national standards
15451-2006《The measurement of industrial circulating cooling water total alkali and phenolphthalein alkalinity》Measurement；Total hardness refers to Ca in water2+And Mg2+It is total
Amount, according to GB/T 15452-2006《The measurement EDTA titration of total hardness in industrial circulating cooling water》Measurement；Cl- is according to mark
Quasi- GB/T15453-2008 measurement；SO4 2-It is measured according to standard GB/T 14642-2009；PH value is according to standard GB/T 6920-
1986 measurements；Conductivity is measured according to standard GB/T 6908-2008；It is total molten solid according to standard GB/T 14415-2007 measurement.
In table 1, pH is without unit；The unit of conductivity is μ s/cm；Its counit is mg/L.
Table 1
| Test raw water | Calcium hardness | Total alkalinity | Total hardness | Cl- | SO4 2- | pH | Conductivity | It is total molten solid |
| Test raw water 1 | 102 | 135 | 136 | 14 | 35 | 7.8 | 190 | 290 |
| Test raw water 2 | 235 | 370 | 323 | 66 | 110 | 7.5 | 995 | 706 |
| Test raw water 3 | 20 | 33 | 35 | 9 | 9 | 7.0 | 100 | 66 |
Embodiment 1
30.0g Carboxymethylinulin (degree of substitution 1.0), 10.0g sodium gluconate and the poly- epoxy succinic of 18.0g are weighed respectively
Acid (Limiting Viscosity is 0.078dl/g at 30 DEG C), is added in 42.0g water, shakes up, obtain composite scale-inhibiting corrosion inhibitor medicament stoste
S1。
The prepared composite scale-inhibiting corrosion inhibitor medicament stoste S1 of 1g is taken to be added in 10L test water 1, so that carboxymethyl in water
The effective concentration of inulin, sodium gluconate and poly-epoxy succinic acid is respectively 6mg/L, 10mg/L and 9mg/L, then according to test
Method in example carries out resistance calcium carbonate scale performance measurement and corrosion inhibition measurement.
Embodiment 2
3.14g zinc chloride is weighed, is dissolved in 9.0g poly-aspartate (Limiting Viscosity is 0.074dl/g at 30 DEG C), then
15.0g Carboxymethylinulin raw material (degree of substitution 0.6) and 18.0g sodium citrate is added, adds 34.86g water, shakes up, obtain
Composite scale-inhibiting corrosion inhibitor medicament stoste S2.
Take the prepared composite scale-inhibiting corrosion inhibitor medicament stoste S2 of 0.8g that 10L test water 2 or 10L test water 3 is added
In so that Carboxymethylinulin in water, sodium citrate, poly-aspartate and zinc ion effective concentration be respectively 3mg/L, 18mg/
L, then 4.5mg/L and 1.5mg/L carries out resistance 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 medicament stoste is then added
S2 carries out corrosion inhibition measurement according still further to the method in test case.For test water 3, it is directly added into composite scale-inhibiting corrosion inhibitor
Medicament stoste 2 carries out corrosion inhibition measurement according still further to the method in test case.
Embodiment 3
1g benzotriazole is weighed, is dissolved in 12g poly-aspartate (Limiting Viscosity is 0.079dl/g at 30 DEG C),
Then 80.0g Carboxymethylinulin (degree of substitution 0.8) and 6.0g sodium tartrate is added, adds 21g water, shakes up, obtain compound
Anti-incrustation corrosion inhibitor medicament stoste S3.
The prepared composite scale-inhibiting corrosion inhibitor medicament stoste S3 of 1.2g is taken to be added in 10L test water 1, so that carboxylic first in water
Base inulin, sodium tartrate, poly-aspartate and benzotriazole effective concentration be respectively 16mg/L, 6mg/L, 6mg/L and
Then 1mg/L carries out resistance calcium carbonate scale performance measurement according to the method in test case and corrosion inhibition measures.
Embodiment 4
40.0g Carboxymethylinulin raw material (degree of substitution 1.2), 10.0g sodium humate and 18.0g polycyclic oxygen amber are weighed respectively
Amber acid (Limiting Viscosity is 0.082dl/g at 30 DEG C), is added in 32g water, shakes up, obtain composite scale-inhibiting corrosion inhibitor medicament stoste
S4。
The prepared composite scale-inhibiting corrosion inhibitor medicament stoste S4 of 1.0g is taken to be added in 10L test water 1, so that carboxylic first in water
The effective concentration of base inulin, sodium humate and poly-epoxy succinic acid is respectively 8mg/L, 10mg/L and 9mg/L, then according to test
Method in example carries out resistance calcium carbonate scale performance measurement and corrosion inhibition measurement.
Embodiment 5
15.0g Carboxymethylinulin raw material (degree of substitution 1.5), 24.0g sodium tartrate and 18.0g polycyclic oxygen amber are weighed respectively
Amber acid (Limiting Viscosity is 0.075dl/g at 30 DEG C), is added in 43g water, shakes up, obtain composite scale-inhibiting corrosion inhibitor medicament stoste
S5。
The prepared composite scale-inhibiting corrosion inhibitor medicament stoste S5 of 1.0g is taken to be added in 10L test water 1, so that carboxylic first in water
The effective concentration of base inulin, sodium tartrate and poly-epoxy succinic acid is respectively 3mg/L, 24mg/L and 9mg/L, then according to test
Method in example carries out resistance calcium carbonate scale performance measurement and corrosion inhibition measurement.
Embodiment 6
18.0g Carboxymethylinulin raw material (degree of substitution 1.0), 4.0g sodium gluconate and the poly- asparagus fern of 12.0g are weighed respectively
Propylhomoserin (Limiting Viscosity is 0.069dl/g at 30 DEG C) and 12g poly-epoxy succinic acid (Limiting Viscosity is 0.065dl/g at 30 DEG C),
It is added in 54g water, shakes up, obtain composite scale-inhibiting corrosion inhibitor medicament stoste S6.
The prepared composite scale-inhibiting corrosion inhibitor medicament stoste S6 of 1.0g is taken to be added in 10L test water 1, so that carboxylic first in water
Base inulin, sodium gluconate, poly-aspartate and poly-epoxy succinic acid effective concentration be respectively 3.6mg/L, 4mg/L, 6mg/L
And 6mg/L, resistance calcium carbonate scale performance measurement then is carried out according to the method in test case and corrosion inhibition measures.
Comparative example 1
40.0g Carboxymethylinulin raw material (degree of substitution 1.0) and 24.0g poly-aspartate (limit at 30 DEG C are weighed respectively
Viscosity number is 0.069dl/g), it is added in 36g water, shakes up, obtain medicament stoste D1.
Prepared 1.0g medicament stoste D1 is taken to be added in 10L test water 1, so that Carboxymethylinulin and poly- asparagus fern in water
The effective concentration of propylhomoserin is respectively 8mg/L and 12mg/L, then carries out resistance calcium carbonate scale performance according to the method in test case and surveys
The measurement of fixed and corrosion inhibition.
Comparative example 2
20.0g Carboxymethylinulin raw material (degree of substitution 0.6) and 10.0g sodium gluconate are weighed respectively, and 70g water is added
In, it shakes up, obtains medicament stoste D2.
Prepared 1.0g medicament stoste D2 is taken to be added in 10L test water 1, so that Carboxymethylinulin and carboxymethyl in water
The effective concentration of chitosan is respectively 4mg/L and 10mg/L, then carries out resistance calcium carbonate scale performance according to the method in test case
Measurement and corrosion inhibition measurement.
Comparative example 3
40.0g Carboxymethylinulin raw material (degree of substitution 0.6) is weighed, is added in 60g water, is shaken up, obtain medicament stoste D3.
Take prepared 1.0g medicament stoste D3 to be added in 10L test water 1 so that in water Carboxymethylinulin it is effective dense
Degree is 8mg/L, then carries out resistance calcium carbonate scale performance measurement according to the method in test case and corrosion inhibition measures.
Comparative example 4
Weighing 10.0g sodium gluconate and 18.0g poly-epoxy succinic acid respectively, (Limiting Viscosity is 0.078dl/ at 30 DEG C
G), it is added in 72g water, shakes up, obtain medicament stoste D4.
Prepared 1.0g medicament stoste D4 is taken to be added in 10L test water 1, so that chitosan and poly- epoxy succinic in water
The effective concentration of acid is respectively 10mg/L and 9mg/L, then carries out resistance calcium carbonate scale performance measurement according to the method in test case
It is measured with corrosion inhibition.
Test case
The anticorrosion-antiscaling property of composite scale-inhibiting corrosion inhibitor of this test case to evaluate embodiment 1-6 and comparative example 1-4.
" blank sample " expression is not added with composite scale-inhibiting corrosion inhibitor, but other processing steps are identical as test (or test) step
Test water sample.
(1) calcium carbonate scale performance measurement method is hindered：
The test water that medicament has been added in each embodiment and comparative example is interior using volumetric flask in 80 ± 1 DEG C of waters bath with thermostatic control
Method stands 10h, after cooling residue Ca in sampling analysis water2+Concentration, while doing blank sample, and calculate scale inhibition performance.As a result see
Table 2.
The definition of scale inhibition performance is the scale inhibition efficiency of corrosion inhibiting and descaling agent, and the calculation 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：Test the cycles of concentration of raw water calcium hardness and total alkalinity
(2) corrosion inhibition measuring method：
20# quality carbon steel test piece is fixed on lacing film instrument, test piece is then completely immersed in each embodiment and comparative example and is thrown
Add in the test water of medicament, steady temperature is 40 ± 1 DEG C, and keeping revolving speed is that 75rpm rotates 72h, record test front and back examination
The weight of piece calculates average corrosion rate.It the results are shown in Table 2.
The definition of average corrosion rate is the inhibition efficiency of corrosion inhibiting and descaling agent, and the calculation formula of average corrosion rate (F) is：
F=(C × △ W)/(A × T × ρ), wherein
C：Computational constant, with mm/a (millimeter/year) be unit when, C=8.76 × 107mm/a
△W：The corrosion weight loss (g) of test specimen
A：Area (the cm of test specimen2)
T：The corrosion test time (h)
ρ：Density (the kg/m of material for test3), ρ=7.85 × 103kg/m3
Table 2
From the data in table 2 can be seen that composite scale-inhibiting corrosion inhibitor provided by the invention with good comprehensive scale inhibition and
Corrosion inhibition.Specifically, it not only has excellent resistance CaCO3Dirty function, there are also good corrosion inhibitions, can satisfy and follow
Requirement of the ring cooling water to scale inhibition and inhibition.
Claims (24)
1. a kind of composite scale-inhibiting corrosion inhibitor, which is characterized in that the composite scale-inhibiting corrosion inhibitor contains Carboxymethylinulin, multi-hydroxy carboxy acid
Salt and poly-aspartate and/or poly-epoxy succinic acid；
Wherein, Carboxymethylinulin：Multi-hydroxy carboxy acid's salt：The weight ratio of poly-aspartate and/or poly-epoxy succinic acid is (12-
100)：(2-25)：(5-25), the degree of substitution of the Carboxymethylinulin are 0.3~1.2.
2. composite scale-inhibiting corrosion inhibitor according to claim 1, wherein Carboxymethylinulin：Multi-hydroxy carboxy acid's salt：Poly- asparagus fern ammonia
The weight ratio of acid and/or poly-epoxy succinic acid is (15-80)：(5-20)：(8-20).
3. composite scale-inhibiting corrosion inhibitor according to claim 1 or 2, wherein the degree of substitution of the Carboxymethylinulin be 0.6~
1.0。
4. composite scale-inhibiting corrosion inhibitor according to claim 1 or 2, wherein multi-hydroxy carboxy acid's salt is selected from citric acid, wine
At least one of stone acid, gluconic acid and sylvite, sodium salt or the potassium sodium double salt of humic acid.
5. composite scale-inhibiting corrosion inhibitor according to claim 1 or 2, wherein multi-hydroxy carboxy acid's salt be selected from sodium citrate,
At least one of sodium tartrate, sodium gluconate and sodium humate.
6. composite scale-inhibiting corrosion inhibitor according to claim 1 or 2, wherein the composite scale-inhibiting corrosion inhibitor also contains heterocycle
Compound.
7. composite scale-inhibiting corrosion inhibitor according to claim 6, wherein the heterocyclic compound be mercaptobenzothiazoler and/
Or benzotriazole.
8. composite scale-inhibiting corrosion inhibitor according to claim 6, wherein the composite scale relative to 100 parts by weight is slow
Agent is lost, the content of the heterocyclic compound is 0.5-2.0 parts by weight.
9. composite scale-inhibiting corrosion inhibitor according to claim 6, wherein the composite scale relative to 100 parts by weight is slow
Agent is lost, the content of the heterocyclic compound is 0.8-1.5 parts by weight.
10. composite scale-inhibiting corrosion inhibitor according to claim 1 or 2, wherein the composite scale-inhibiting corrosion inhibitor also contains zinc
Salt.
11. composite scale-inhibiting corrosion inhibitor according to claim 10, wherein the zinc salt is zinc sulfate and/or zinc chloride.
12. composite scale-inhibiting corrosion inhibitor according to claim 10, wherein the composite scale relative to 100 parts by weight
Corrosion inhibiter, the dosage of the zinc salt is with Zn2+Weight be calculated as 0.5-2.0 parts by weight.
13. composite scale-inhibiting corrosion inhibitor according to claim 10, wherein the composite scale relative to 100 parts by weight
Corrosion inhibiter, the dosage of the zinc salt is with Zn2+Weight be calculated as 1.0-1.5 parts by weight.
14. application of the composite scale-inhibiting corrosion inhibitor in circulating water cooling treatment described in any one of claim 1-13.
15. application according to claim 14, wherein the effective concentration of Carboxymethylinulin is 2-20mg/L；Polyhydroxy carboxylic
The effective concentration of hydrochlorate is 5-20mg/L；The effective concentration of poly-aspartate and/or poly-epoxy succinic acid is 4-15mg/L.
16. application according to claim 14, wherein the effective concentration of Carboxymethylinulin is 3-16mg/L.
17. application according to claim 14, wherein the effective concentration of multi-hydroxy carboxy acid's salt is 6-18mg/L.
18. application according to claim 14, wherein the effective concentration of poly-aspartate and/or poly-epoxy succinic acid is
4.5-9mg/L。
19. application according to claim 14, wherein when the composite scale-inhibiting corrosion inhibitor contains heterocyclic compound, institute
The effective concentration for stating heterocyclic compound is 0.5-1.5mg/L.
20. application according to claim 19, wherein the effective concentration of the heterocyclic compound is 0.8-1.2mg/L.
21. application according to claim 19, wherein the heterocyclic compound is mercaptobenzothiazoler and/or benzo three
Nitrogen azoles.
22. application according to claim 14, wherein when the composite scale-inhibiting corrosion inhibitor contains zinc salt, the zinc salt
With Zn2+The effective concentration of meter is 0.5-1.8mg/L.
23. application according to claim 22, wherein the zinc salt is with Zn2+The effective concentration of meter is 1.0-1.5mg/L.
24. application according to claim 22, wherein the zinc salt is zinc sulfate and/or zinc chloride.
Priority Applications (1)
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| CN107352660A (en) * | 2017-08-03 | 2017-11-17 | 合肥隆延科技有限公司 | The special water treatment agent of hydrophobic membrane |
| CN107746118B (en) * | 2017-09-26 | 2020-08-04 | 浙江海洋大学 | Water treatment agent and preparation method thereof |
| CN108640298A (en) * | 2018-05-29 | 2018-10-12 | 苏州佑君环境科技有限公司 | A kind of oil field waste antisludging agent and preparation method thereof |
| JP6750705B2 (en) * | 2018-05-30 | 2020-09-02 | 栗田工業株式会社 | Initial treatment agent for circulating cooling water and method for preventing corrosion of circulating cooling water system |
| CN111138592A (en) * | 2019-12-31 | 2020-05-12 | 长江大学 | Carboxymethyl inulin graft polymer scale and corrosion inhibitor and preparation method thereof |
| CN111620449A (en) * | 2020-07-07 | 2020-09-04 | 北京尤洁科技有限公司 | Phosphorus-free nitrogen-free green environment-friendly hot water boiler water treatment agent |
| CN112299575B (en) * | 2020-10-13 | 2022-11-15 | 鞍钢栗田(鞍山)水处理有限公司 | Composite phosphorus-free corrosion and scale inhibitor applied to dry quenching waste heat boiler and preparation method thereof |
| CN113213602A (en) * | 2021-05-17 | 2021-08-06 | 绿水青山环保科技（大连）有限公司 | Purifying agent for producing nitrogenous wastewater by aerobic fermentation of household garbage, and preparation method and application thereof |
| CN115557617A (en) * | 2022-09-29 | 2023-01-03 | 河北省科学院能源研究所 | Reverse osmosis membrane scale and corrosion inhibitor for recycling phosphorus-containing reclaimed water and preparation method thereof |
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