CN103771597A - Phosphorus-free composite scale and corrosion inhibitor, applications thereof, and processing method for circulating water - Google Patents
Phosphorus-free composite scale and corrosion inhibitor, applications thereof, and processing method for circulating water Download PDFInfo
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Abstract
The invention discloses a phosphorus-free composite scale and corrosion inhibitor, applications thereof, and a processing method for circulating water. The phosphorus-free composite scale and corrosion inhibitor comprises a scale inhibitor, dispersants and manganese salts. The scale inhibitor is polyaspartic acid and/or polyepoxysuccinic acid. The weight ratio of the scale inhibitor, the dispersants and the manganese salts is 1:0.2-10:0.025-1, wherein the weight of the manganese salts is in terms of manganese ions. The phosphorus-free composite scale and corrosion inhibitor has good synergistic effects with non-oxidation-type bactericides, especially isothiazolinone, and can raise the bactericidal effects of the non-oxidation-type bactericides obviously, the bactericidal speed is rapid and the drug effect time is long. The phosphorus-free composite scale and corrosion inhibitor is environmentally friendly, has phosphorus-free and nitrogen-free characteristics, meets green environmental protection requirements, and reduces environmental burden. The phosphorus-free composite scale and corrosion inhibitor has a wide water quality adaptation range, and is easy to be popularized and applied.
Description
Technical field
The present invention relates to the treatment process of a kind of non-Phosphorus composite anti incrustation eorrosion snhibiter and application thereof and recirculated water, particularly, relate to a kind of non-Phosphorus composite anti incrustation eorrosion snhibiter and the application in circulating water treatment thereof and utilize the circulating water treatment method of this non-Phosphorus composite anti incrustation eorrosion snhibiter.
Background technology
Water is the primary condition that the mankind depend on for existence, but water resources is limited in the world.The water yield per capita of China be only the world per capita the water yield 1/4th, water resources is more poor.Along with industrial high speed development, the eubiosis of water is subject to havoc.For solving water resources crisis, adapt to Sustainable development, rationally water saving.Cooling water amount in process water accounts for the 60-80 % by weight of total water amount, and therefore, the major objective of saving process water is to recycle water coolant, improves as much as possible repeating utilization factor, reduces blowdown simultaneously.But in water coolant use procedure, along with constantly circulating and concentrating, the content of water mineral also can constantly increase, and has aggravated pipeline and equipment corrosion and scale problems, so must add water conditioner to improve the quality of water coolant in water coolant, thereby guarantee equipment safety operation.
What at present, anti-incrustation corrosion inhibitor research in water conditioner is enlivened the most is organic phosphoric acid anti-incrustation corrosion inhibitor and copolymer anti-scale disperser.Organic phosphoric acid compound particularly organic multicomponent phosphoric acid and salt thereof has stable chemical performance, resistance to comparatively high temps and higher pH and obvious feature such as " threshold effect " and " synergistic effect ", therefore its appearance makes water technology stride forward major step, a now widely used class water conditioner, as ATMP, HEDP, PBTCA etc.But organic phosphoric acid compound can not effectively suppress calcium phosphate scale, zinc dirt and solve the problems such as iron oxide precipitation, and itself easily forms organic phosphoric acid dirt.In addition, because phosphorous water conditioner degraded discharges inorganic phosphorus, make phosphorous in recirculated water draining and cause environmental pollution, and increasingly strict along with the reinforcement of people's environmental consciousness and respective environment rules, environmental administration starts the use of restriction to phosphorus, for example Germany requires the discharge of phosphorus to be less than or equal to 1mg/L, so the application of organic phosphoric acid compound is restricted.Therefore developing low-phosphorous or without phosphorus novel green anti-incrustation corrosion inhibitor has become the important topic of domestic and international water conditioner aspect research.
Common non-phosphorus scale and corrosion inhibitor formula mainly comprises poly-epoxy succinic acid or poly aspartic acid, without phosphorus containing carboxylic acid group polymer, non-phosphate inhibitor and zinc salt.More than the zinc salt in formula can form in metallic surface zinc hydroxide and precipitate and cover cathode surface, thus formation negative electrode corrosion inhibiting film and reduce corrosion of metal.
In the treatment process of recirculated water, when adding anti-incrustation corrosion inhibitor, also need to add sterilant to suppress microbial growth in recirculated water, but while using the above-mentioned anti-incrustation corrosion inhibitor containing zinc salt, anti-incrustation corrosion inhibitor and sterilant are without remarkable synergistic effect, while particularly using isothiazolinone as sterilant, sterilant takes effect slow and effective drug duration is short.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of and sterilant to have the treatment process of non-Phosphorus composite anti incrustation eorrosion snhibiter and application and the recirculated water of better synergistic effect.
To achieve these goals, on the one hand, the invention provides a kind of non-Phosphorus composite anti incrustation eorrosion snhibiter, it is characterized in that, this non-Phosphorus composite anti incrustation eorrosion snhibiter contains Scale inhibitors, dispersion agent and manganese salt, described Scale inhibitors is poly aspartic acid and/or poly-epoxy succinic acid, and the weight ratio of described Scale inhibitors, dispersion agent and manganese salt is 1:0.2-10:0.025-1, and wherein the weight of manganese salt is by mn ion.
On the other hand, the invention provides the application of above-mentioned non-Phosphorus composite anti incrustation eorrosion snhibiter in circulating water treatment.
Again on the one hand, the invention provides a kind for the treatment of process of recirculated water, it is characterized in that, the method comprises in recirculated water and adds above-mentioned non-Phosphorus composite anti incrustation eorrosion snhibiter and sterilant.
The present inventor finds, non-Phosphorus composite anti incrustation eorrosion snhibiter of the present invention and non-oxidative bactericide particularly isothiazolinone have good synergistic effect, can obviously improve the sterilization effect of isothiazolinone, show as sterilization soon and effective drug duration long.Non-Phosphorus composite anti incrustation eorrosion snhibiter of the present invention is environmentally friendly in addition, avoids using P contained compound, have without phosphorus, without the characteristic of nitrogen, meet the requirement of environmental protection, alleviated environmental pressure; Non-Phosphorus composite anti incrustation eorrosion snhibiter of the present invention is higher to calcium and alkali tolerance, is specially adapted to total hardness and total alkalinity sum at 100-300mgL
-1the processing of recirculated water, be easy to apply.
Other features and advantages of the present invention are described in detail the embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
Non-Phosphorus composite anti incrustation eorrosion snhibiter of the present invention contains Scale inhibitors, dispersion agent and manganese salt, described Scale inhibitors is poly aspartic acid and/or poly-epoxy succinic acid, the weight ratio of described Scale inhibitors, dispersion agent and manganese salt is 1:0.2-10:0.025-1, be preferably 1:1-2.5:0.125-0.5, wherein the weight of manganese salt is by mn ion.
According to the present invention, described manganese salt can be the manganese salt of any solubility, as long as can produce Mn after being added in recirculated water
2+, under preferable case, described manganese salt is one or more in Manganous chloride tetrahydrate, manganous sulfate and manganous nitrate.
According to the present invention, described dispersion agent can be the main conventional polymkeric substance containing carboxylic acid group polymer and/or acid anhydrides using in various this areas that plays dissemination, for example, can be the multipolymer of carboxylic acid or its acid anhydrides and/or the multipolymer of carboxylic acid or its acid anhydrides and sulfonate.Under preferable case, described dispersion agent is polyacrylic acid, polymaleic acid, polymaleic anhydride, the multipolymer of vinylformic acid and acrylate, toxilic acid and acrylic acid multipolymer, maleic anhydride and acrylic acid multipolymer, the multipolymer of toxilic acid and styrene sulfonic acid, the multipolymer of maleic anhydride and styrene sulfonic acid, the multipolymer of vinylformic acid and styrene sulfonic acid, the multipolymer of acrylate and styrene sulfonic acid, the multipolymer of toxilic acid and allyl sulphonic acid, the multipolymer of maleic anhydride and allyl sulphonic acid, the multipolymer of vinylformic acid and allyl sulphonic acid, the multipolymer of vinylformic acid and vinyl sulfonic acid, the multipolymer of vinylformic acid and 2-acrylamide-2-methylpro panesulfonic acid, the multipolymer of vinylformic acid and acrylamide and 2-acrylamide-2-methylpro panesulfonic acid, the multipolymer of vinylformic acid and acrylate and 2-acrylamide-2-methylpro panesulfonic acid, the multipolymer of vinylformic acid and toxilic acid and 2-acrylamide-2-methylpro panesulfonic acid, one or more in the multipolymer of vinylformic acid and Propylene glycol monoacrylate and 2-acrylamide-2-methylpro panesulfonic acid.
Wherein, described acrylate can be vinylformic acid C
1-8ester, for example vinylformic acid C
1-8alkyl ester and/or vinylformic acid C
1-8hydroxy alkyl ester, is preferably one or more in methyl acrylate, ethyl propenoate and Propylene glycol monoacrylate.It should be noted that: initiator system when above-mentioned polymkeric substance is synthetic has two, and one is phosphorous inferior sodium phosphate and ammonium persulphate initiator system; Another is without phosphorus Sodium Pyrosulfite and ammonium persulphate initiator system, consider the pollution of phosphorus to environment, the initiator system when polymkeric substance that the present invention uses synthesizes is preferably Sodium Pyrosulfite and ammonium persulphate initiator system, the concrete synthesis step of above-mentioned polymkeric substance is well known to those skilled in the art, does not repeat them here.
According to the present invention, described non-Phosphorus composite anti incrustation eorrosion snhibiter can also contain copper material corrosion inhibitor, suppresses the function of copper corrosion further to strengthen non-Phosphorus composite anti incrustation eorrosion snhibiter of the present invention.The weight ratio of described copper material corrosion inhibitor and described Scale inhibitors can be 0.025-0.75:1.Described copper material corrosion inhibitor can be the conventional nitrogen azole material in this area, is preferably mercaptobenzothiazole and/or benzotriazole.
The present invention also provides the application of above-mentioned non-Phosphorus composite anti incrustation eorrosion snhibiter in circulating water treatment.Wherein, the consumption of described non-Phosphorus composite anti incrustation eorrosion snhibiter is preferably 6.5-43.5mg/L recirculated water, more preferably 13-20mg/L recirculated water.
The treatment process of recirculated water provided by the invention, is characterized in that, the method comprises in recirculated water and adds above-mentioned non-Phosphorus composite anti incrustation eorrosion snhibiter and sterilant.
According to the present invention, described sterilant preferably includes oxidative bactericide and non-oxidative bactericide.Non-Phosphorus composite anti incrustation eorrosion snhibiter and sterilant can add in recirculated water simultaneously, also can add respectively.The wherein sterilant microorganism in controlled circulation water and in the treating processes of recirculated water effectively, conventionally the method that adopts oxidative bactericide and non-oxidative bactericide to be used alternatingly, the principle and the method that are used alternatingly are well known to those skilled in the art, and therefore repeat no more.
Wherein, described oxidative bactericide can be selected from one or more in liquid chlorine, clorox, dioxide peroxide, trichloroisocyanuric acid, DICHLOROISOCYANURIC ACID, bromochlorodimethyl hydanton and dibromo dimethyl hydantoin.The consumption of described oxidative bactericide can be 0.5-30mg/L recirculated water conventionally.
Described non-oxidative bactericide can be selected from CMIT, MIT, glutaraldehyde, dodecyl benzyl dimethyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide, tetradecyl dimethyl benzyl ammonium chloride, tetradecyl tributyl phosphorus chloride, 2, one or more in 2-bis-bromo-3-nitrilo propionic acid amide and 2-bromo-2-nitro-1,3-propylene glycol.The consumption of described non-oxidative bactericide can be 5-100mg/L recirculated water conventionally.
In circulating water treatment method of the present invention, sterilizing rate when the composite use of described non-Phosphorus composite anti incrustation eorrosion snhibiter and isothiazolinone is improved, and its reason may be the Mn in described non-Phosphorus composite anti incrustation eorrosion snhibiter
2+have good synergistic effect with described isothiazolinone, therefore preferred described non-oxidative bactericide is isothiazolinone.Described isothiazolinone is the industrial biocide mildewcide of a class broad-spectrum high efficacy, can be by commercially available, the effective constituent of described isothiazolinone is CMIT and MIT, and the weight ratio of the two can be 2-5:1 conventionally, be preferably 3:1, but be not limited to this.In the time using non-Phosphorus composite anti incrustation eorrosion snhibiter of the present invention and isothiazolinone disinfecting agent cycle for the treatment of water, can improve the bactericidal property of isothiazolinone.
According to the present invention, the consumption of described non-Phosphorus composite anti incrustation eorrosion snhibiter can be 6.5-43.5mg/L recirculated water.
According to the present invention, can realize object of the present invention as long as prepare described non-Phosphorus composite anti incrustation eorrosion snhibiter according to aforementioned base materials formula, can prepare before use described non-Phosphorus composite anti incrustation eorrosion snhibiter, after each raw material being mixed according to aforementioned formula, add again in recirculated water; Also each raw material directly can be added in recirculated water without mixing step according to aforementioned formula.
According to the present invention, processing total hardness and total alkalinity sum at 300mgL
-1when above water quality, described non-Phosphorus composite anti incrustation eorrosion snhibiter can also contain the good component of the corrosion inhibitions such as molybdate, and generally adopt sour adjust pH technique, first add non-Phosphorus composite anti incrustation eorrosion snhibiter of the present invention, add again acid to control pH value for 6.5-8.5, be preferably 7.8-8.3, described acid can be the conventional various acid in this area, for example sulfuric acid and/or nitric acid.Processing total hardness and total alkalinity sum at 100mgL
-1when following water quality, described non-Phosphorus composite anti incrustation eorrosion snhibiter also can also contain the good component of the corrosion inhibitions such as molybdate.Kind and the amount of the molybdate adding are well known to the skilled person, and do not repeat them here.
Below will describe the present invention by embodiment.
In following examples, the water quality of testing former water is as shown in table 1, to test respectively former water 1 and 2 and concentrate 5 times as test water 1 and 2, to test former water 3 and concentrate 3 times as test water 3, in the time processing test water 1, all need to after interpolation medicament, regulate its pH value within the scope of 7.8-8.3 with sulfuric acid, wherein Ca
2+, total alkalinity and total hardness be all with CaCO
3meter, Ca
2+represent calcium hardness, the measuring method of each parameter is as follows:
Ca
2+: reference standard GB/T 6910-2006;
Total alkalinity: reference standard GB/T 15451-2006;
Total hardness: reference standard GB/T 6909-2008;
Cl
-: reference standard GB/T 15453-2008;
SO
4 2-: reference standard GB/T 14642-2009;
PH value: reference standard GB/T 6920-1986;
Specific conductivity: reference standard GB/T 6908-2008;
Total molten solid: reference standard GB/T 14415-2007;
Table 1
In following examples, " blank sample " represents not add any medicament (anti-incrustation corrosion inhibitor and/or sterilant) but other treatment steps and test (or test) the test water sample that step is identical.
Sterilizing rate has reacted the sterilization effect of non-Phosphorus composite anti incrustation eorrosion snhibiter and bactericide compounded use described in specified time, and the calculation formula of sterilizing rate is:
The bacteria containing amount of sterilizing rate=(bacteria containing amount of bacteria containing amount-certain time sample of blank sample) × 100%/blank sample;
Scale inhibition performance is defined as the scale inhibition efficiency of corrosion inhibiting and descaling agent, and the calculation formula of scale inhibition performance is:
Scale inhibition performance=(C-C
0)/(nC
1-C
0) × 100%, wherein,
C: remain Ca in cooling rear water
2+concentration (mg/L)
C
0: the Ca of blank sample
2+concentration (mg/L)
C
1: the Ca in former water
2+concentration (mg/L)
N: cycles of concentration
Average corrosion rate is defined as 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, take mm/a(millimeter/year) during as unit, C=8.76 × 10
7
△ W: the corrosion weight loss (g) of test specimen
A: the area (cm of test specimen
2)
T: corrosion test time (h)
ρ: the density (kg/m of material for test
3)
The polymkeric substance using in embodiment is as follows:
Poly aspartic acid (PASP,
active quantities is 40%), the multipolymer of T225(vinylformic acid and 2-acrylamide-2-methylpro panesulfonic acid, AA/HPA, the weight ratio of each structural unit is 4/1, active quantities is 30%, 30 ℃ time, Limiting Viscosity is 0.072dl/g), vinylformic acid and 2-acrylamide-2-methylpro panesulfonic acid and Propylene glycol monoacrylate multipolymer (AA/AMPS/HPA, the weight ratio of each structural unit is 14/3/3, active quantities is 30%, 30 ℃ time, Limiting Viscosity is 0.081dl/g), poly-epoxy succinic acid (PESA
active quantities is 40%), vinylformic acid and Propylene glycol monoacrylate and maleic acid (AA/HPA/MA, the weight ratio of each structural unit is 14/3/3, active quantities is 30%, 30 ℃ time, Limiting Viscosity is 0.073dl/g), vinylformic acid and 2-acrylamide-2-methylpro panesulfonic acid multipolymer (AA/AMPS, the weight ratio of each structural unit is 7/3, active quantities is 30%, 30 ℃ time, Limiting Viscosity is 0.075dl/g), toxilic acid and Styrene Sulfonic Acid Copolymer (MA/SS, the weight ratio of each structural unit is 7/3, active quantities is 30%, 30 ℃ time, Limiting Viscosity is 0.072dl/g), polyacrylic acid (PAA,
active quantities is 50%, 30 ℃ time, Limiting Viscosity is 0.073dl/g), vinylformic acid and acrylamide and 2-acrylamide-2-methylpro panesulfonic acid multipolymer (AA/AM/AMPS, active quantities is 30%, the weight ratio of each structural unit is 14/3/3,30 ℃ time, Limiting Viscosity is 0.073dl/g), polymaleic anhydride (PMAH
active quantities is 50%), vinylformic acid and allyl sulphonic acid multipolymer (AA/AS, active quantities is 30%, the weight ratio of each structural unit is 7/3, 30 ℃ time, Limiting Viscosity is 0.073dl/g), vinylformic acid and Styrene Sulfonic Acid Copolymer (AA/SS, active quantities is 30%, the weight ratio of each structural unit is 7/3, 30 ℃ time, Limiting Viscosity is 0.072dl/g), vinylformic acid and toxilic acid and 2-acrylamide-2-methylpro panesulfonic acid multipolymer (AA/MA/AMPS, active quantities is 30%, the weight ratio of each structural unit is 14/3/3, 30 ℃ time, Limiting Viscosity is 0.072dl/g), toxilic acid and acrylic copolymer (MA/AA, active quantities is 30%, the weight ratio of each structural unit is 7/3, 30 ℃ time, Limiting Viscosity is 0.072dl/g), isothiazolinone (the two mixture of CMIT and MIT, the two weight ratio is 3:1, effective content is 1.6%, Beijing Tianqing Chemical Co., Ltd.), (effective content is 45% to dodecyl benzyl dimethyl ammonium chloride, Shandong calm and peaceful water treatment company limited).
Embodiment 1
In test water, add poly aspartic acid, T225, Manganous sulfate monohydrate and isothiazolinone respectively, make poly aspartic acid in water, T225, Mn
2+be respectively 4mg/L, 8mg/L, 1mg/L and 50mg/L with the concentration of isothiazolinone.
Embodiment 2
In test water, add poly-epoxy succinic acid, AA/AMPS, Manganous sulfate monohydrate and isothiazolinone respectively, make poly-epoxy succinic acid in water, AA/AMPS, Mn
2+be respectively 6mg/L, 9mg/L, 1.5mg/L and 80mg/L with the concentration of isothiazolinone.
Embodiment 3
In test water, add poly aspartic acid, AA/AMPS/HPA, Manganous chloride tetrahydrate and isothiazolinone respectively, make poly aspartic acid in water, AA/AMPS/HPA, Mn
2+be respectively 8mg/L, 10mg/L, 2mg/L and 100mg/L with the concentration of isothiazolinone.
Embodiment 4
In test water, add each material according to the mode of embodiment 3, different, isothiazolinone is replaced by dodecyl benzyl dimethyl ammonium chloride.
Comparative example 1
In test water, add each material according to the mode of embodiment 3, different, Manganous sulfate monohydrate is replaced by Zinc vitriol.
Comparative example 2
In test water, add isothiazolinone respectively, the concentration that makes isothiazolinone in water is 100mg/L.
Comparative example 3
In test water, add dodecyl benzyl dimethyl ammonium chloride respectively, the concentration that makes dodecyl benzyl dimethyl ammonium chloride in water is 100mg/L.
Embodiment 5
In test water, add poly-epoxy succinic acid, MA/SS, PAA, Manganous sulfate monohydrate and isothiazolinone respectively, make poly-epoxy succinic acid in water, MA/SS, PAA, Mn
2+be respectively 5mg/L, 4mg/L, 4mg/L, 1mg/L and 80mg/L with the concentration of isothiazolinone.
Embodiment 6
In test water, add poly-epoxy succinic acid, poly aspartic acid, AA/HPA/MA, AA/AM/AMPS, manganous nitrate and isothiazolinone respectively, make poly-epoxy succinic acid in water, poly aspartic acid, AA/HPA/MA, AA/AM/AMPS, Mn
2+be respectively 4mg/L, 4mg/L, 5mg/L, 5mg/L, 2mg/L and 80mg/L with the concentration of isothiazolinone.
Embodiment 7
In test water, add poly-epoxy succinic acid, poly aspartic acid, PMAH and Manganous sulfate monohydrate respectively, make poly-epoxy succinic acid in water, poly aspartic acid, PMAH and Mn
2+concentration be respectively 2mg/L, 2mg/L, 15mg/L and 0.5mg/L.
Embodiment 8
In test water, add poly-epoxy succinic acid, AA/SS, AA/AS and Manganous sulfate monohydrate respectively, make poly-epoxy succinic acid in water, AA/SS, AA/AS and Mn
2+concentration be respectively 20mg/L, 6mg/L, 6mg/L and 2mg/L.
Embodiment 9
In test water, add poly aspartic acid, poly-epoxy succinic acid, AA/MA/AMPS and Manganous sulfate monohydrate respectively, make poly aspartic acid in water, poly-epoxy succinic acid, AA/MA/AMPS and Mn
2+concentration be respectively 2mg/L, 2mg/L, 20mg/L and 1.5mg/L.
Comparative example 4
Be 50% 2-phosphate-1 to adding active ingredient in test water respectively, 2,4-butane tricarboxylate (PBTCA) and hydroxy ethylene diphosphonic acid (HEDP), AA/AMPS/HPA and Zinc vitriol, make PBTCA in water, HEDP, AA/AMPS/HPA and Zn
2+concentration be respectively 5mg/L, 4mg/L, 6mg/L and 2mg/L.
The mensuration of sterilization effect
Measure respectively in the water of blank sample, embodiment 1-6 and comparative example 1-3 the bacteria containing amount after 4h, 24h, 48h, 72h and calculate sterilizing rate, measuring method is with reference to the regulation of " the static bactericidal assay of heterotrophic bacterium " in " water coolant analysis and the test method " of production department of China PetroChemical Corporation and development division establishment.Calculation result is as shown in table 2, and the "/" in table 2 represents to calculate.
Table 2
In upper table, the result of embodiment 1-3 and comparative example 1-2 relatively can be found out, the composite use of non-Phosphorus composite anti incrustation eorrosion snhibiter of the present invention and isothiazolinone has synergistic effect, and the sterilizing rate that the sterilizing rate recording when 4h and 72h in embodiment 1-3 records during apparently higher than 4h in comparative example 2 and 72h, illustrates that circulating water treatment method of the present invention sterilization is fast and effective drug duration is long; Again the result of embodiment 1-3 and embodiment 4 relatively can be found out, although the sterilant quick result that embodiment 4 uses, but effective drug duration is short, in the time of 24h, record sterilizing rate in each test water all in 10% left and right, bacteria containing amount when 48h is higher than blank sample, just there is no obvious sterilization effect, and in embodiment 1-3 each time period all show higher sterilization effect; And embodiment 4 is substantially close with the result of comparative example 3, illustrates that the composite use of non-Phosphorus composite anti incrustation eorrosion snhibiter of the present invention and dodecyl benzyl dimethyl ammonium chloride does not have synergistic effect.
So, can find out from the data of table 2, the sterilization effect of non-Phosphorus composite anti incrustation eorrosion snhibiter of the present invention and the composite use of isothiazolinone is obviously better than anti-incrustation corrosion inhibitor and the sterilization effect of the composite use of isothiazolinone and the sterilization effect of non-Phosphorus composite anti incrustation eorrosion snhibiter of the present invention and the composite use of other non-oxidative bactericides containing zinc salt formula.
The evaluation of anticorrosion-antiscaling property
In 80 ± 1 ℃ of waters bath with thermostatic control, adopt volumetric flask method to leave standstill 10h the test water that has added medicament in each embodiment and comparative example, in sampling analysis water, remain Ca after cooling
2+concentration, make blank sample simultaneously, and calculate scale inhibition performance.
The test piece of 20# qualitative carbon steel is fixed on lacing film instrument, put into the test water that each embodiment and comparative example have added medicament, steady temperature is 40 ± 1 ℃, and keeping rotating speed is 75rpm rotation 72h, before and after record test, the weight of test piece, calculates average corrosion rate (F).
Evaluation result is as shown in table 3:
Table 3
The data of table 3 show, composite scale-inhibiting corrosion inhibitor of the present invention has good anticorrosion-antiscaling property.
Dynamic analog test
For simulated field, also carry out dynamic analog test.Dynamic analog test method is undertaken by the chemical industry standard HG/T2160-91 of the People's Republic of China (PRC), controls parameter as follows:
Water quality: the former water 1 in table 1
Cycles of concentration: concentrated calcium hardness+total alkalinity value that makes meets:
A tower 900 ± 50mg/L B tower 900 ± 50mg/L
Flow velocity: 1.0m/s
Medicament: the compound of A tower: embodiment 3
B tower: the compound of comparative example 1
Temperature in: 32 ± 1 ℃ of temperature difference: 10 ℃
Dynamic analog test test tube the results are shown in Table 4.
Table 4
In standard GB/T 50050-95 " Code for design of industrial recirculating cooling water treatment " 3.1.6, stipulate, the erosion rate of the carbon steel tube wall of open type system is less than or equal to 0.125mm/a; In " water coolant analysis and the test method " of production department of China PetroChemical Corporation and development division establishment, the corrosion speed of " the small-sized experimental analogic method of testing laboratory " regulation carbon steel is " fine " level between 0-0.028mm/a, between 0.028-0.056mm/a, being " good " level, is " can allow " level at 0.056-0.070mm/a; Adhesion speed is " fine " level at 0-6mcm, is " good " level at 6-15mcm, is " can allow " level at 15-20mcm.
As can be seen here, apply non-Phosphorus composite anti incrustation eorrosion snhibiter of the present invention in the situation that calcium hardness and total alkalinity sum are 900 ± 50mg/L, the erosion rate of test tube is 0.021mm/a, reaches China Petrochemical Industry " fine " grade standard, adhesion speed is 5.1mcm, reaches " fine " grade standard.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out arbitrary combination between various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a non-Phosphorus composite anti incrustation eorrosion snhibiter, it is characterized in that, this non-Phosphorus composite anti incrustation eorrosion snhibiter contains Scale inhibitors, dispersion agent and manganese salt, described Scale inhibitors is poly aspartic acid and/or poly-epoxy succinic acid, the weight ratio of described Scale inhibitors, dispersion agent and manganese salt is 1:0.2-10:0.025-1, and wherein the weight of manganese salt is by mn ion.
2. non-Phosphorus composite anti incrustation eorrosion snhibiter according to claim 1, wherein, the weight ratio of described Scale inhibitors, dispersion agent and manganese salt is 1:1-2.5:0.125-0.5.
3. non-Phosphorus composite anti incrustation eorrosion snhibiter according to claim 1 and 2, wherein, described manganese salt is one or more in Manganous chloride tetrahydrate, manganous sulfate and manganous nitrate.
4. non-Phosphorus composite anti incrustation eorrosion snhibiter according to claim 1 and 2, wherein, described dispersion agent is polyacrylic acid, polymaleic acid, polymaleic anhydride, the multipolymer of vinylformic acid and acrylate, toxilic acid and acrylic acid multipolymer, maleic anhydride and acrylic acid multipolymer, the multipolymer of toxilic acid and styrene sulfonic acid, the multipolymer of maleic anhydride and styrene sulfonic acid, the multipolymer of vinylformic acid and styrene sulfonic acid, the multipolymer of acrylate and styrene sulfonic acid, the multipolymer of toxilic acid and allyl sulphonic acid, the multipolymer of maleic anhydride and allyl sulphonic acid, the multipolymer of vinylformic acid and allyl sulphonic acid, the multipolymer of vinylformic acid and vinyl sulfonic acid, the multipolymer of vinylformic acid and 2-acrylamide-2-methylpro panesulfonic acid, the multipolymer of vinylformic acid and acrylamide and 2-acrylamide-2-methylpro panesulfonic acid, the multipolymer of vinylformic acid and acrylate and 2-acrylamide-2-methylpro panesulfonic acid, the multipolymer of vinylformic acid and toxilic acid and 2-acrylamide-2-methylpro panesulfonic acid, one or more in the multipolymer of vinylformic acid and Propylene glycol monoacrylate and 2-acrylamide-2-methylpro panesulfonic acid.
5. non-Phosphorus composite anti incrustation eorrosion snhibiter according to claim 4, wherein, described acrylate is one or more in methyl acrylate, ethyl propenoate and Propylene glycol monoacrylate.
6. non-Phosphorus composite anti incrustation eorrosion snhibiter according to claim 1, wherein, described non-Phosphorus composite anti incrustation eorrosion snhibiter also contains copper material corrosion inhibitor, and the weight ratio of described copper material corrosion inhibitor and described Scale inhibitors is 0.025-0.75:1, and described copper material corrosion inhibitor is mercaptobenzothiazole and/or benzotriazole.
7. the application of the non-Phosphorus composite anti incrustation eorrosion snhibiter described in any one in circulating water treatment in claim 1-6.
8. application according to claim 7, wherein, the consumption of described non-Phosphorus composite anti incrustation eorrosion snhibiter is 6.5-43.5mg/L recirculated water.
9. a treatment process for recirculated water, is characterized in that, the method comprises in recirculated water and adds the non-Phosphorus composite anti incrustation eorrosion snhibiter described in any one and sterilant in claim 1-6.
10. method according to claim 9, wherein, described sterilant comprises oxidative bactericide and non-oxidative bactericide, described non-oxidative bactericide is isothiazolinone.
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