CN109019884A - A kind of compound slow corrosion dirt dispersion agent and its application - Google Patents
A kind of compound slow corrosion dirt dispersion agent and its application Download PDFInfo
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- CN109019884A CN109019884A CN201811150003.8A CN201811150003A CN109019884A CN 109019884 A CN109019884 A CN 109019884A CN 201811150003 A CN201811150003 A CN 201811150003A CN 109019884 A CN109019884 A CN 109019884A
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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
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
- C02F5/125—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen combined with inorganic substances
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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
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/105—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances combined with inorganic substances
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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
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
- C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The present invention relates to heat supply network sealing and circulating water-treatment technology field, a kind of compound slow corrosion dirt dispersion agent and its application are specifically disclosed.By weight percentage, including following component: molybdate: 2-7.5%, any one of imidazolines or organic amine: 1.65-10%, non-ferrous metal corrosion inhibiter: 0.35-0.75%, organic phospho acid: 0.83-1.68%, carbonyl bearing polymer: 2-3.35%, surplus are water.Compound slow corrosion dirt dispersion agent prepared by the present invention is under which kind of condition of water quality, all there is excellent comprehensive performance, not only have the function of excellent resistance calcium carbonate scale, but also also there is excellent corrosion inhibition to carbon steel, belong to environmentally friendly new sustained release agent, is suitable for heat supply network sealing and circulating water process.
Description
Technical field
The present invention relates to heat supply network sealing and circulating water-treatment technology field more particularly to a kind of compound slow corrosion dirt dispersion agent and
It is applied.
Background technique
Inhibition and scale inhibition are heat supply network sealing and circulating water process greatest problems to be solved, due to the concentration times of closed system
Rate is not high, and generally 1.0-1.5 times, different water quality, compound slow corrosion dirt dispersion agent problem to be solved is different, no matter right
In to soft, low alkalinity water quality or medium hardness, basicity and high rigidity, the water quality of high alkalinity, general use adds alkali to match
Side, mainly by adding adjusting PH with base value processing mode, formula stresses inhibition but no scale inhibition effect, under strongly alkaline conditions, system
It is possible that generating serious fouling.
Corrosion and scale inhibition disperser mostly uses organic phospho acid at present, and being present in excess for phosphine can make eutrophication in water, promotes algae
The growth of class and microorganism causes deleterious effect to environment.Simultaneously as country is to the raising of environmental protection standard requirement, low phosphine or
No phosphine formula is increasingly paid attention to, and the development and utilization of these environmental-friendly corrosion and scale inhibition dispersers also have received widespread attention.
Summary of the invention
For the problems such as existing corrosion inhibiting and descaling agent corrosion mitigating effect is poor, fouling is serious, phosphine excess and environment is unfriendly, the present invention
A kind of compound slow corrosion dirt dispersion agent can effectively solve the problem that problem above is provided.
And the present invention provides the application of the compound slow corrosion dirt dispersion agent.
To achieve the above object of the invention, the embodiment of the present invention uses the following technical solution:
A kind of compound slow corrosion dirt dispersion agent, by weight percentage, including following component: by weight percentage, packet
Following component: molybdate: 2-7.5% is included, any one of imidazolines or organic amine: 1.65-10%, non-ferrous metal inhibition
Agent: 0.35-0.75%, organic phospho acid: 0.83-1.68%, carbonyl bearing polymer: 2-3.35%, surplus are water.
Compared with the existing technology, compound slow corrosion dirt dispersion agent provided by the invention, has the advantage that
(1) compound slow corrosion dirt dispersion agent of the invention is forming fine and close corrosion inhibition film in metal surface, effectively prevent gold
The corrosion of metal surface, corrosion inhibition film include passivating film and adsorbed film, and wherein molybdate is carbon steel corrosion inhibitor, with non-ferrous metal corrosion inhibiter
Fine and close Fe-MoO can be formed with organic phosphine4-Fe2O3Film, plays passivation, and the component of film layer has FeOP, FeO, MoO and N
[CHCHOPO (OH)] etc.；Organic amine and imidazolines also can form adsorbed film in metal surface simultaneously, also can effectively prevent metal
The corrosion on surface.
(2) organic phospho acid because P-C key polarity it is small, especially strong to the sequestering power of underwater gold category ion while poly- containing carboxylic acid
Closing the carboxylic acid group in object also has very strong chelation to underwater gold category ion, therefore polymerize by organic phospho acid and containing carboxylic acid
Object to calcium carbonate, calcium sulfate etc. at the distortion of lattice effect of dirt matter and peptizaiton so that the present invention has good resistance carbon
Sour calcium scale, calcium sulfate and phosphonic acids calcium scale ability, and the particle dispersion of dispersing agent can be good.
(3) present invention has both chemical action, physical action, by the synergistic effect between each component, so that compounding inhibition
Dirt dispersion agent gives full play to each component advantage, has good inhibition and scale inhibition and dispersion performance, while having low phosphine, low toxicity
Property, it is pollution-free the advantages that.
(4) compound slow corrosion dirt dispersion agent provided by the invention is suitable for heat supply network sealing and circulating water process, especially suitable for
The super-low-hardness of the sum of total hardness and total alkalinity less than 100mg/L, low alkalinity water quality and the sum of total hardness and total alkalinity are greater than
High rigidity, the high alkalinity water quality heat supply network sealing and circulating water process of 300mg/L, being applied equally to the sum of total hardness and total alkalinity is
Medium hardness, the moderate alkalinity water quality heat supply network sealing and circulating water process of 100-300mg/L.
Specifically, it is preferred that the molybdate is selected from anhydrous molybdic acid sodium, ammonium molybdate, Sodium Molybdate Dihydrate or anhydrous molybdic acid potassium
One of.
Preferably, the imidazolines are selected from 1- (2- ethoxy) -1- benzyl-tridecane imidazoline nitrite, alkyl
One of imidazoline, imidazoline quaternary amine or 1- ethamine -2- alkyl imidazoline.
Preferably, the organic amine is selected from triethanolamine, diethanol amine, monoethanolamine, methoxy propanamine or triethylene two
One of amine.
Preferably, the non-ferrous metal corrosion inhibiter is selected from mercaptobenzothiazoler, benzotriazole or methyl benzotriazazole
One of.
Preferably, the organic phospho acid is selected from 1-hydroxy ethylidene-1,1-diphosphonic acid, aminotrimethylenephosphonic acid, 2- phosphonic acid base -1,2,4-
Butane tricarboxylate, hydroxyethylidene diphosphonic acid guanidine-acetic acid, ethylene diamine tetra methylene phosphonic acid, diethylene triamine pentamethylene phosphonic, two methene of glycine
Phosphonic acids, two methylenephosphonic acid of glutamic acid, two methylenephosphonic acid of amino sulphur, two methylenephosphonic acid of tarine or polyether-based polyamino are sub-
One of methylphosphonic acid.
Preferably, the carbonyl bearing polymer is poly-epoxy succinic acid, polyacrylic acid, polymaleic anhydride, acrylic acid/propylene
Sour hydroxypropyl ester copolymer, acrylic acid/hydroxypropyl acrylate/methyl acrylate copolymer, maleic anhydride/styrene sulfonic acid copolymerization
Object, acrylic/styrene sulfonic acid copolymer, acrylate/Styrene Sulfonic Acid Copolymer, maleic anhydride/allyl sulphonic acid copolymerization
Object, acrylic acid/allyl sulphonic acid copolymer, acrylic acid/vinyl sulfonic acid copolymer, acrylic acid/2- methyl 2 ,-acrylamido alkane
Sulfonic acid copolymer, acrylic acid/2- methyl 2 ,-acrylamido propane sulfonic acid copolymer, acrylic acid/esters/2- methyl 2 ,-
Acrylamido alkyl sulfonic acid copolymer, acrylic acid/maleic acid/2- methyl 2 ,-acrylamido alkyl sulfonic acid copolymer or acrylic acid/
2- acrylamido -2- methylpropanephosphonic acid/methyl -2 2-, one of-acrylamido propane sulfonic acid copolymer.
Further, the present invention also provides above-mentioned compound slow corrosion dirt dispersion agents in heat supply network sealing and circulating water treatment field
Application.
Preferably, the concentration of each component is respectively as follows: molybdate in pending water solution: 5-20mg/L, imidazolines or
Organic amine is any: 5-35mg/L, non-ferrous metal corrosion inhibiter: 0.5-5mg/L, organic phospho acid: 2-8mg/L, polymerize containing carboxyl
Object: 3-20mg/L.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1
The present embodiment provides a kind of compound slow corrosion dirt dispersion agents, including following component: anhydrous molybdic acid sodium, 17 alkenyl hydroxyls
Ethyl imidazol(e) hyamine, benzotriazole, 1-hydroxy ethylidene-1,1-diphosphonic acid and polyacrylic acid.
Wherein, compound slow corrosion dirt dispersion agent is the preparation method comprises the following steps: weigh 13.3g anhydrous molybdic acid sodium, 17 alkenyl hydroxyl of 20.0g
The polyacrylic acid that 1-hydroxy ethylidene-1,1-diphosphonic acid that ethyl imidazol(e) hyamine, 6.7g solid content are 50%, 10.0g solid content are 40%
It is added in 148.7g water with 1.3g benzotriazole, stirring and dissolving is to get the 200.0g dispersing agent for arriving required preparation.
It is added by the dispersant concentration of 300mg/L into test water 3# with prepared dispersing agent.And wait locate
The concentration of each component is respectively as follows: molybdate in reason aqueous solution: 20mg/L, imidazolines: 30mg/L, non-ferrous metal corrosion inhibiter:
2mg/L, organic phospho acid: 5mg/L, carbonyl bearing polymer: 6mg/L.
Embodiment 2
The present embodiment provides a kind of compound slow corrosion dirt dispersion agents, including following component: Sodium Molybdate Dihydrate, 17 alkenyl hydroxyls
Ethyl imidazol(e) hyamine, methyl benzotriazazole, 1-hydroxy ethylidene-1,1-diphosphonic acid and poly-epoxy succinic acid.
Wherein, compound slow corrosion dirt dispersion agent is the preparation method comprises the following steps: weigh 4.0g Sodium Molybdate Dihydrate, 17 alkenyl hydroxyl second of 3.3g
The poly- epoxy succinic that 1-hydroxy ethylidene-1,1-diphosphonic acid that base imidazoline quaternary ammonium salt, 8.0g solid content are 50%, 16.7g solid content are 40%
Acid and 1.5g methyl benzotriazazole are added in 166.5g water, and stirring and dissolving is to get the 200.0g dispersing agent for arriving required preparation.
It is added by the dispersant concentration of 300mg/L into test water 1# with prepared dispersing agent.And wait locate
The concentration of each component is respectively as follows: molybdate in reason aqueous solution: 5mg/L, imidazolines: 5mg/L, non-ferrous metal corrosion inhibiter:
2.3mg/L, organic phospho acid: 6mg/L, carbonyl bearing polymer: 10mg/L.
Embodiment 3
The present embodiment provides a kind of compound slow corrosion dirt dispersion agent, raw material includes following component: ammonium molybdate, triethanolamine,
Mercaptobenzothiazoler, 2- phosphonic acid base -1,2,4- butane tricarboxylate and polymaleic anhydride.
Wherein, compound slow corrosion dirt dispersion agent is the preparation method comprises the following steps: weigh 12.0g ammonium molybdate, 16.7g triethanolamine, 4.0g
The polymaleic anhydride and 1.3g mercapto that 2- phosphonic acid base -1,2,4- butane tricarboxylate that solid content is 50%, 13.4g solid content are 50%
Base benzothiazole is added in 152.6g water, and stirring and dissolving is to get the 200.0g dispersing agent for arriving required preparation.
It is added by the dispersant concentration of 300mg/L into test water 2# with prepared dispersing agent.And wait locate
The concentration of each component is respectively as follows: molybdate in reason aqueous solution: 18mg/L, organic amine: 25mg/L, non-ferrous metal corrosion inhibiter: 2mg/
L, organic phospho acid: 3mg/L, carbonyl bearing polymer: 10mg/L.
Embodiment 4
The present embodiment provides a kind of compound slow corrosion dirt dispersion agents, including following component: anhydrous molybdic acid potassium, Heptadecanoic acide miaow
Oxazoline, methyl benzotriazazole, hydroxyethylidene diphosphonic acid guanidine-acetic acid and acrylic acid/allyl sulphonic acid copolymer.
Wherein, compound slow corrosion dirt dispersion agent is the preparation method comprises the following steps: weigh 13.5g anhydrous molybdic acid potassium, 16.7g Heptadecanoic acide miaow
Acrylic acid/allyl sulphonic acid that hydroxyethylidene diphosphonic acid guanidine-acetic acid that oxazoline, 4.0g solid content are 50%, 22.2g solid content are 30% is total
Polymers and 1.3g methyl benzotriazazole are added in 142.3g water, and stirring and dissolving is dispersed to get to the 200.0g of required preparation
Agent.
When being added by the dispersant concentration of 300mg/L into test water 2# with prepared dispersing agent.And to
The concentration of each component is respectively as follows: molybdate in processing aqueous solution: 18mg/L, imidazolines: 25mg/L, non-ferrous metal corrosion inhibiter:
2mg/L, organic phospho acid: 3mg/L, carbonyl bearing polymer: 10mg/L.
Embodiment 5
The present embodiment provides a kind of compound slow corrosion dirt dispersion agents, including following component: ammonium molybdate, 1- (2- ethoxy)-
1- benzyl-tridecane imidazoline nitrite, methyl benzotriazazole, ethylene diamine tetra methylene phosphonic acid and sodium acrylate (AA)/horse
Carry out sour/2- methyl -2- acrylamido propane sulfonic acid (AMPS) copolymer.
Wherein, compound slow corrosion dirt dispersion agent is the preparation method comprises the following steps: weigh 6.7g ammonium molybdate, 10.0g1- (2- ethoxy) -1-
Ethylene diamine tetra methylene phosphonic acid that benzyl-tridecane imidazoline nitrite, 5.3g solid content are 50%, 17.8g solid content are
30% sodium acrylate (AA)/maleic acid/2- methyl -2- acrylamido propane sulfonic acid (AMPS) copolymer and 0.7g methylbenzene
And triazole is added in 159.5g water, stirring and dissolving is to get the 200.0g dispersing agent for arriving required preparation.
It is added by the dispersant concentration of 300mg/L into test water 1# with prepared dispersing agent.And wait locate
The concentration of each component is respectively as follows: molybdate in reason aqueous solution: 10mg/L, imidazolines: 15mg/L, non-ferrous metal corrosion inhibiter:
1mg/L, organic phospho acid: 4mg/L, carbonyl bearing polymer: 8mg/L.
Embodiment 6
The present embodiment provides a kind of compound slow corrosion dirt dispersion agents, including following component: ammonium molybdate, diethanol amine, methyl
Benzotriazole, diethylene triamine pentamethylene phosphonic and sodium acrylate (AA)/hydroxypropyl acrylate (HPA)/methyl acrylate are total
Polymers.
Wherein, compound slow corrosion dirt dispersion agent is the preparation method comprises the following steps: weigh 15.0g ammonium molybdate, 16.7g diethanol amine, 3.3g
Sodium acrylate (AA)/acrylic acid hydroxypropyl that diethylene triamine pentamethylene phosphonic that solid content is 50%, 22.2g solid content are 30%
Ester (HPA)/methyl acrylate copolymer and 1.3g methyl benzotriazazole are added in 141.5g water, and stirring and dissolving is to get arriving
The 200.0g dispersing agent of required preparation.
It is added by the dispersant concentration of 300mg/L into test water 2# with prepared dispersing agent and both may be used.And wait locate
The concentration of each component is respectively as follows: molybdate in reason aqueous solution: 20mg/L, organic amine: 25mg/L, non-ferrous metal corrosion inhibiter: 2mg/
L, organic phospho acid: 2.5mg/L, carbonyl bearing polymer: 10mg/L.
Embodiment 7
The present embodiment provides a kind of compound slow corrosion dirt dispersion agents, including following component: Sodium Molybdate Dihydrate, 17 alkenyl hydroxyls
Ethyl imidazol(e) hyamine, methyl benzotriazazole, two methylenephosphonic acid of tarine and sodium acrylate (AA)/acrylic acid hydroxypropyl
Ester (HPA) copolymer.
Wherein, compound slow corrosion dirt dispersion agent is the preparation method comprises the following steps: weigh 11.8g Sodium Molybdate Dihydrate, 17 alkenyl hydroxyl of 13.3g
Two methylenephosphonic acid of tarine that ethyl imidazol(e) hyamine, 4.0g solid content are 50%, third that 13.3g solid content is 30%
Olefin(e) acid sodium (AA)/hydroxypropyl acrylate (HPA) copolymer, the maleic anhydride that 13.3g solid content is 30%/allyl sulphonic acid copolymerization
Object and 0.7g methyl benzotriazazole are added in 143.6g water, and stirring and dissolving is to get the 200.0g dispersing agent for arriving required preparation.
It is added by the dispersant concentration of 300mg/L into test water 1# with prepared dispersing agent and both may be used.And wait locate
The concentration of each component is respectively as follows: molybdate in reason aqueous solution: 15mg/L, imidazolines: 20mg/L, non-ferrous metal corrosion inhibiter:
1mg/L, organic phospho acid: 3mg/L, carbonyl bearing polymer: 6mg/L.
Embodiment 8
The present embodiment provides a kind of compound slow corrosion dirt dispersion agents, including following component: Sodium Molybdate Dihydrate, 17 alkenyl hydroxyls
Ethyl imidazol(e) hyamine, methyl benzotriazazole, diethylene triamine pentamethylene phosphonic and sodium acrylate (AA)/acrylic acid first
Ester/2- methyl -2- acrylamido propane sulfonic acid copolymer.
Weigh 11.8g Sodium Molybdate Dihydrate, 13.3g imidazoline quaternary amine, the diethylenetriamine five that 3.5g solid content is 50%
Methylenephosphonic acid, sodium acrylate (AA)/methyl acrylate/2- methyl -2- acrylamido propane sulphur that 22.2g solid content is 30%
Acid copolymer and 0.7g methyl benzotriazazole are added in 148.6g water, and stirring and dissolving is to get the 200.0g for arriving required preparation
Dispersing agent.
It is added by the dispersant concentration of 300mg/L into test water 3# with prepared dispersing agent and both may be used.And wait locate
The concentration of each component is respectively as follows: molybdate in reason aqueous solution: 17.7mg/L, imidazolines: 20mg/L, non-ferrous metal corrosion inhibiter:
1mg/L, organic phospho acid: 2.6mg/L, carbonyl bearing polymer: 10mg/L.
Comparative example 1
This comparative example provides a kind of compound slow corrosion dirt dispersion agent, including following component: tungstate dihydrate acid sodium, 17 alkenyl hydroxyls
Ethyl imidazol(e) hyamine, benzotriazole, 1-hydroxy ethylidene-1,1-diphosphonic acid and polyacrylic acid.
Wherein, compound slow corrosion dirt dispersion agent is the preparation method comprises the following steps: weigh 13.3g tungstate dihydrate acid sodium, 17 alkenyl hydroxyl of 20.0g
The polyacrylic acid that 1-hydroxy ethylidene-1,1-diphosphonic acid that ethyl imidazol(e) hyamine, 6.7g solid content are 50%, 10.0g solid content are 40%
It is added in 148.7g water with 1.3g benzotriazole, stirring and dissolving is to get the 200.0g dispersing agent for arriving required preparation.
It is added by the dispersant concentration of 300mg/L into test water 3# with prepared dispersing agent.And wait locate
The concentration of each component is respectively as follows: tungstates in reason aqueous solution: 20mg/L, imidazolines: 30mg/L, non-ferrous metal corrosion inhibiter:
2mg/L, organic phospho acid: 5mg/L, carbonyl bearing polymer: 6mg/L.
Comparative example 2
This comparative example provides a kind of compound slow corrosion dirt dispersion agent, including following component: anhydrous molybdic acid sodium, 17 alkenyl hydroxyls
Ethyl imidazol(e) hyamine, benzotriazole, sulfuric acid monohydrate sodium and polyacrylic acid.
Wherein, compound slow corrosion dirt dispersion agent is the preparation method comprises the following steps: weigh 13.3g anhydrous molybdic acid sodium, 20.0g imidazoline quaternary amine
Salt, 3.5g sulfuric acid monohydrate sodium, the polyacrylic acid that 10.0g solid content is 40% and 1.3g benzotriazole are added to 151.9g water
In, stirring and dissolving is to get the 200.0g dispersing agent for arriving required preparation.
It is added by the dispersant concentration of 300mg/L into test water 3# with prepared dispersing agent.And wait locate
The concentration of each component is respectively as follows: molybdate in reason aqueous solution: 20mg/L, imidazolines: 30mg/L, non-ferrous metal corrosion inhibiter:
2mg/L, sulfuric acid monohydrate sodium: 5mg/L, carbonyl bearing polymer: 6mg/L.
Comparative example 3
This comparative example provides a kind of compound slow corrosion dirt dispersion agent, including following component: anhydrous molybdic acid sodium, methenamine,
Benzotriazole, 1-hydroxy ethylidene-1,1-diphosphonic acid and polyacrylic acid.
Wherein, compound slow corrosion dirt dispersion agent the preparation method comprises the following steps: weigh 13.3g anhydrous molybdic acid sodium, 20.0g methenamine,
The polyacrylic acid and 1.3g benzotriazole that 1-hydroxy ethylidene-1,1-diphosphonic acid that 6.7g solid content is 50%, 10.0g solid content are 40%
It is added in 148.7g water, stirring and dissolving is to get the 200.0g dispersing agent for arriving required preparation.
It is added by the dispersant concentration of 300mg/L into test water 3# with prepared dispersing agent.And wait locate
The concentration of each component is respectively as follows: molybdate in reason aqueous solution: 20mg/L, methenamine: 30mg/L, non-ferrous metal corrosion inhibiter:
2mg/L, organic phospho acid: 5mg/L, carbonyl bearing polymer: 6mg/L.
The characteristic for the compound slow corrosion dirt dispersion agent that embodiment provides in order to better illustrate the present invention, below by embodiment
The compound slow corrosion dirt dispersion agent of 1-8 and comparative example 1-3 preparation carries out performance detection.
Test example 1
Raw water quality used in following embodiments see the table below 1.
Raw water quality is used in the test of table 1
| Water quality | Ca2+ | Total alkalinity | Total hardness | Cl- | SO4 2- | pH | Conductivity | It is total molten solid |
| Raw water 1 | 250 | 385 | 400 | 75 | 110 | 7.8 | 1050 | 720 |
| Raw water 2 | 90 | 150 | 150 | 19 | 35 | 7.8 | 410 | 295 |
| Raw water 3 | 20 | 35 | 45 | 8 | 9 | 7.1 | 90 | 60 |
Note: for pH without unit, conductivity is μ s/cm, counit mg/L, Ca2+, total hardness, total alkalinity is with CaCO3
Meter, similarly hereinafter；Ca2+Hardness is represented, similarly hereinafter.
Wherein the measuring method of water quality is referring to as follows:
Ca2+: GB/T6910-2006 " boiler feed water and cooling water analysis method calcium catalyst compleximetry "
Total alkalinity: GB/T15451-2006 " measurement of industrial circulating cooling water total alkalinity and phenolphthalein alkalinity "
Total hardness: GB/T6909-2008 " measurement of boiler feed water and cooling water analysis method hardness "
Cl-: GB/T15453-2008 " chloride ion conductor in industrial circulating cooling water and boiler feed water "
SO4 2-: GB/T14642-2009 " fluorine, chlorine, phosphonate radical, nitrite anions, nitre in industrial circulating cooling water and boiler water
The measurement chromatography of ions of sour silver and sulfate radical "
PH:GB/T6920-1986 " the measurement glass electrode method of water quality ph value "
Conductivity: GB/T6908-2008 " measurement of boiler feed water and cooling water analysis method conductivity "
It is total molten solid: GB/T14415-2007 " measurement of solid matter in industrial circulating cooling water and boiler water "
Test example 2
Test water water quality used in following embodiments see the table below 2.
Raw water quality is used in the test of table 2
Resistance calcium carbonate scale performance: taking test water, the dispersant concentration added by embodiment is added, in 90 ± 1 DEG C of perseverances
10 hours are stood with volumetric flask method in tepidarium, after cooling residue Ca in sampling analysis water2+Concentration, while doing blank sample,
And calculate scale inhibition performance.
Scale inhibition performance calculation formula are as follows: scale inhibition performance=(C-C0)/(nC1-C0) × 100%
C: actual measurement Ca2+Concentration (mg/L)
C0: the Ca of blank sample2+Concentration (mg/L)
C1: the Ca in raw water2+Concentration (mg/L)
N: cycles of concentration
Corrosion inhibition: 20# quality carbon steel test piece is fixed on lacing film instrument, is put into added with the dispersion added by embodiment
The test water of agent concentration, keeps revolving speed 75rpm to rotate 72 hours by 90 ± 1 DEG C of steady temperature, the weight of record test front and back test piece
Amount calculates average corrosion rate.
The calculation formula of average corrosion speed are as follows: F=(C × △ W)/(A × ρ)
C: computational constant, with mm/a (millimeter/year) be unit when, C=8.76 × 107
△ W: the corrosion weight loss (g) of test piece
A: the area (cm of test piece2)
T: corrosion test time (h)
ρ: the density (kg/m of test material3)
Test example 3
Compound slow corrosion dirt dispersion agent prepared by embodiment 1-8 and comparative example 1-3 carries out performance detection, testing result
As shown in table 3 below.
3 testing result of table
From table 3 it can be seen that not only there is raw water in test water, also there are the raw water being concentrated by different multiples, the present invention
The compound slow corrosion dirt dispersion agent of embodiment 1-8 preparation all has excellent comprehensive performance, not only under which kind of condition of water quality
Have the function of excellent resistance calcium carbonate scale, and also there is excellent corrosion inhibition to carbon steel, is suitable for heat supply network sealing and circulating water
Processing.
The compound slow corrosion dirt dispersion agent of comparative example 1-3 preparation is imitated under conditions of identical water quality with the embodiment of the present invention 1
Fruit comparison, corrosion mitigating effect are obviously deteriorated, and scale inhibition efficiency reduces.Illustrate that each component acts synergistically mutually in the present invention, can be only achieved
Above-mentioned technical effect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (9)
1. a kind of compound slow corrosion dirt dispersion agent, it is characterised in that: by weight percentage, including following component: molybdate: 2-
7.5%, any one of imidazolines or organic amine: 1.65-10%, non-ferrous metal corrosion inhibiter: 0.35-0.75%, organic phosphine
Acid: 0.83-1.68%, carbonyl bearing polymer: 2-3.35%, surplus are water.
2. compound slow corrosion dirt dispersion agent as described in claim 1, it is characterised in that: the molybdate is selected from anhydrous molybdic acid
One of sodium, ammonium molybdate, Sodium Molybdate Dihydrate or anhydrous molybdic acid potassium.
3. compound slow corrosion dirt dispersion agent as described in claim 1, it is characterised in that: the imidazolines are selected from 1- (2- hydroxyl
Ethyl) -1- benzyl-tridecane imidazoline nitrite, alkyl imidazoline, imidazoline quaternary amine or 1- ethamine -2- alkyl imidazole
One of quinoline.
4. compound slow corrosion dirt dispersion agent as described in claim 1, it is characterised in that: the organic amine be selected from triethanolamine,
One of diethanol amine, monoethanolamine, methoxy propanamine or triethylene diamine.
5. compound slow corrosion dirt dispersion agent as described in claim 1, it is characterised in that: the non-ferrous metal corrosion inhibiter is selected from mercapto
One of base benzothiazole, benzotriazole or methyl benzotriazazole.
6. compound slow corrosion dirt dispersion agent as described in claim 1, it is characterised in that: the organic phospho acid is selected from hydroxy ethylidene
Di 2 ethylhexyl phosphonic acid, aminotrimethylenephosphonic acid, 2- phosphonic acid base -1,2,4- butane tricarboxylate, hydroxyethylidene diphosphonic acid guanidine-acetic acid, ethylenediamine tetraacetic methene phosphine
Acid, diethylene triamine pentamethylene phosphonic, two methylenephosphonic acid of glycine, two methylenephosphonic acid of glutamic acid, two methylenephosphonic acid of amino sulphur,
One of two methylenephosphonic acid of tarine or polyether-based polyamino methylene phosphonic acid.
7. compound slow corrosion dirt dispersion agent as described in claim 1, it is characterised in that: the carbonyl bearing polymer is polycyclic oxygen
Succinic acid, polyacrylic acid, polymaleic anhydride, acrylic acid/hydroxypropyl acrylate copolymer, acrylic acid/hydroxypropyl acrylate/propylene
Sour methyl terpolymer, maleic anhydride/Styrene Sulfonic Acid Copolymer, acrylic/styrene sulfonic acid copolymer, acrylate/benzene second
Alkene sulfonic acid copolymer, maleic anhydride/allyl sulphonic acid copolymer, acrylic acid/allyl sulphonic acid copolymer, acrylic acid/ethylene sulphur
Acid copolymer, acrylic acid/2- methyl 2 ,-acrylamido alkyl sulfonic acid copolymer, acrylic acid/2- methyl 2 ,-acrylamido third
Alkyl sulfonic acid copolymer, acrylic acid/esters/2- methyl 2 ,-acrylamido alkyl sulfonic acid copolymer, acrylic acid/maleic acid/2-
Methyl 2,-acrylamido alkyl sulfonic acid copolymer or acrylic acid/2- acrylamido -2- methylpropanephosphonic acid/methyl -2 2-,-the third
One of acrylamide base propane sulfonic acid copolymer.
8. the described in any item compound slow corrosion dirt dispersion agents of claim 1~7 are in heat supply network sealing and circulating water treatment field
Using.
9. application as claimed in claim 8, it is characterised in that: the concentration of each component is respectively as follows: molybdenum in pending water solution
Hydrochlorate: 5-20mg/L, imidazolines or organic amine are any: 5-35mg/L, non-ferrous metal corrosion inhibiter: 0.5-5mg/L, organic
Phosphonic acids: 2-8mg/L, carbonyl bearing polymer: 3-20mg/L.
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