CN113466420B - Scale inhibitor evaluation method and device - Google Patents
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- CN113466420B CN113466420B CN202110638512.0A CN202110638512A CN113466420B CN 113466420 B CN113466420 B CN 113466420B CN 202110638512 A CN202110638512 A CN 202110638512A CN 113466420 B CN113466420 B CN 113466420B
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- 239000002455 scale inhibitor Substances 0.000 title claims abstract description 122
- 238000011156 evaluation Methods 0.000 title claims abstract description 95
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 344
- 238000012360 testing method Methods 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 238000001728 nano-filtration Methods 0.000 claims abstract description 25
- 238000002474 experimental method Methods 0.000 claims description 97
- 239000012528 membrane Substances 0.000 claims description 60
- 238000001914 filtration Methods 0.000 claims description 34
- 150000002500 ions Chemical class 0.000 claims description 18
- -1 aluminum ion Chemical class 0.000 claims description 17
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 8
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 5
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- 229940085991 phosphate ion Drugs 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
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- 239000003651 drinking water Substances 0.000 abstract description 16
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- 230000005764 inhibitory process Effects 0.000 description 5
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910001423 beryllium ion Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Inorganic materials [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1853—Hardness of water
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Abstract
The invention provides a method for evaluating a scale inhibitor, which relates to the field of water treatment and comprises the following steps: the method comprises the steps of detecting the quality of inlet water, obtaining the quality index of the inlet water, determining at least one target scale inhibitor suitable for the quality index according to the quality index, then obtaining concentrated water generated by the inlet water after being treated by a nanofiltration system as test raw water, preparing an experimental water sample corresponding to each experimental scheme by reacting the test raw water with the experimental sample corresponding to each experimental scheme and containing the target scale inhibitor with different concentrations and/or types under preset reaction conditions, thus obtaining evaluation parameters of the experimental water sample of each experimental scheme, and evaluating the adaptability of the experimental sample corresponding to each experimental scheme in the inlet water treatment according to the evaluation parameters. The embodiment of the invention is used for solving the problems that the conventional scale inhibitor evaluation method is relatively comprehensive, and the scale inhibitor evaluation method suitable for drinking water treatment is rarely involved, so that effective evaluation cannot be provided in objective use.
Description
Technical Field
The invention relates to the field of water treatment, in particular to a method and a device for evaluating a scale inhibitor.
Background
The drinking water source is divided into underground water and surface water (rivers, lakes and reservoirs), the water quality difference of different water sources is large, and along with the gradual increase of the water quality requirement of people on the drinking water, the water obtained by the conventional process of coagulation, precipitation, filtration and disinfection can not meet the water quality requirement of people on the drinking water.
In the prior art, tap water plants often improve the quality of produced water by adding advanced treatment processes such as a membrane separation technology and the like, and the nanofiltration membrane treatment process is gradually paid attention by people due to the advantages of stable quality of produced water, high water outlet efficiency and the like, wherein the nanofiltration membrane can intercept organic pollutants with medium and small molecular weights in water, and simultaneously remove calcium, magnesium ions, sulfate, nitrate and the like, so that the hardness of the water is effectively reduced. However, byproducts such as aluminum ions, iron ions, zinc ions, silicates, phosphates and the like generated in the pretreatment stage of the nanofiltration membrane process and fluctuation of the pH, alkalinity and water temperature of the incoming water can cause the invalidation of the scale inhibitor in the nanofiltration system. The conventional scale inhibitor evaluation methods mainly comprise a static scale inhibition method, a bubbling method, a comprehensive hard scale measurement method and the like. However, conventional scale inhibitor evaluation methods such as a static scale inhibition method and a bubbling method are mostly suitable for industrial water such as circulating water and boiler water, a comprehensive hard scale measurement method is suitable for water quality with high enough hardness, and a scale inhibitor evaluation method suitable for drinking water treatment is rarely involved.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for evaluating a scale inhibitor, which are used to evaluate a scale inhibitor suitable for drinking water treatment by integrating a plurality of evaluation parameters, so as to find the scale inhibitor with the best adaptability in the drinking water treatment as the scale inhibitor for the drinking water treatment.
In order to achieve the above purpose, the technical solutions provided by the embodiments of the present invention are as follows:
in a first aspect, an embodiment of the present invention provides a method for evaluating a scale inhibitor, where the method includes:
detecting the quality of inlet water to obtain the quality index of the inlet water, wherein the quality index comprises the concentration of preset ions and the water quality environment;
determining at least one target scale inhibitor according to the water quality index, wherein the target scale inhibitor is a scale inhibitor suitable for the water quality index;
obtaining test raw water, wherein the test raw water is concentrated water generated by the inlet water through the nanofiltration system;
preparing a plurality of experimental water samples of experimental schemes, wherein the experimental water sample of each experimental scheme is an aqueous solution obtained by reacting the test raw water with the experimental sample corresponding to each experimental scheme under a preset reaction condition, and the concentration and/or the type of the target scale inhibitor in the experimental sample corresponding to each experimental scheme are different;
obtaining evaluation parameters of the experimental water samples of the experimental schemes;
and evaluating the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment according to the evaluation parameters.
As an optional implementation manner of the embodiment of the present invention, the preset ions include: at least one of aluminum ion, iron ion, zinc ion, silicate ion, and phosphate ion;
the water quality environment comprises: at least one of a pH, alkalinity, and temperature of the influent water.
As an optional implementation manner of the embodiment of the present invention, the preset reaction condition includes:
the reaction is carried out for at least 10 hours under the condition that the stirring speed is 200-300 r/min.
As an optional implementation manner of the embodiment of the present invention, the acquiring evaluation parameters of the experimental water samples of each experimental scheme includes:
obtaining the turbidity and the conductivity of the experimental water sample of each experimental scheme;
and enabling the experimental water sample of each experimental scheme to pass through the preset filter membrane, and acquiring the filtration rate of the experimental water sample of each experimental scheme passing through the preset filter membrane.
As an optional implementation manner of the embodiment of the present invention, the obtaining of the filtration rate of the experiment water sample of each experiment scheme through the preset filter membrane includes:
the filtration rate of the experimental water sample passing through the preset filter membrane in each experimental scheme is obtained according to the following formula:
wherein S is the filtration rate, V is the volume of the experiment water sample, d is the diameter of the preset filter membrane, and t is the time length of the experiment water sample passing through the preset filter membrane.
As an optional implementation manner of the embodiment of the present invention, the evaluating, according to the evaluation parameter, the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment includes:
and acquiring the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment according to the evaluation parameters of the experimental water sample of each experimental scheme and the evaluation parameters of the control experiment corresponding to each experimental scheme.
As an optional implementation manner of the embodiment of the present invention, the acquiring, according to the evaluation parameters of the experimental water sample of each experimental scheme and the evaluation parameters of the control experiment corresponding to each experimental scheme, the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment includes:
obtaining a value of the adaptability according to the following formula:
wherein the content of the first and second substances,
AS is the value of said adaptability, S 1 The filtration rate and S of the experiment water sample passing through the preset filter membrane 0 The filtration rate and TU of the experimental water sample in the control experiment passing through the preset filter membrane 1 Is turbidity and TU of the experimental water sample 0 Is the turbidity and TDS of the experimental water sample in the control experiment 1 Is the conductivity, TDS of the experimental water sample 0 Is the conductivity of the experimental water sample in the control experiment.
As an optional implementation manner of the embodiment of the present invention, the method further includes:
after the adaptability values of the experimental samples corresponding to the experimental schemes in the water inlet treatment are obtained, the experimental sample with the maximum adaptability value in the experimental samples corresponding to the experimental schemes is selected as the scale inhibitor of the water inlet.
As an optional implementation manner of the embodiment of the present invention, the acquiring evaluation parameters of the experimental water samples of each experimental scheme includes:
setting a plurality of groups of parallel experiments under each experiment scheme, and acquiring evaluation parameters of the experiment water sample of each group of parallel experiments;
and obtaining the average value of the evaluation parameters of the experimental water samples of the multiple groups of parallel experiments set under each experimental scheme as the evaluation parameters of the experimental water samples of each experimental scheme.
In a second aspect, an embodiment of the present invention provides a scale inhibitor evaluation apparatus, including:
the detection module is used for detecting the quality of inlet water to obtain the quality index of the inlet water, wherein the quality index comprises the concentration of preset ions and the water quality environment;
the determination module is used for determining at least one target scale inhibitor according to the water quality index, wherein the target scale inhibitor is a scale inhibitor suitable for the water quality index;
the acquisition module is used for acquiring test raw water, and the test raw water is concentrated water generated by the inlet water treated by the nanofiltration system;
the preparation module is used for preparing a plurality of experimental water samples of experimental schemes, the experimental water sample of each experimental scheme is an aqueous solution obtained by reacting the test raw water with the experimental sample corresponding to each experimental scheme under a preset reaction condition, and the concentration and/or the type of the target scale inhibitor in the experimental sample corresponding to each experimental scheme are different;
the calculation module is used for acquiring evaluation parameters of the experimental water samples of the experimental schemes;
and the evaluation module is used for evaluating the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment according to the evaluation parameters.
As an optional implementation manner of the embodiment of the present invention, the preset ions include: at least one of aluminum ion, iron ion, zinc ion, silicate ion, and phosphate ion;
the water quality environment comprises: at least one of a pH, alkalinity, and temperature of the influent water.
As an optional implementation manner of the embodiment of the present invention, the preset reaction condition includes:
the reaction is carried out for at least 10 hours under the condition that the stirring speed is 200-300 r/min.
As an optional implementation manner of the embodiment of the present invention, the calculation module is specifically configured to obtain turbidity and conductivity of the experimental water sample of each experimental scheme;
and enabling the experimental water sample of each experimental scheme to pass through the preset filter membrane, and acquiring the filtration rate of the experimental water sample of each experimental scheme passing through the preset filter membrane.
As an optional implementation manner of the embodiment of the present invention, the calculation module is specifically configured to obtain a filtration rate of the experimental water sample of each experimental scheme through the preset filtration membrane according to the following formula:
the method comprises the following steps of obtaining an experiment water sample, wherein S is the filtration rate, V is the volume of the experiment water sample, d is the diameter of a preset filter membrane, and t is the time length of the experiment water sample passing through the preset filter membrane.
As an optional implementation manner of the embodiment of the present invention, the evaluation module is specifically configured to obtain, according to the evaluation parameters of the experimental water sample of each experimental scheme and the evaluation parameters of the control experiment corresponding to each experimental scheme, the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment.
As an optional implementation manner of the embodiment of the present invention, the evaluation module is specifically configured to obtain the adaptive value according to the following formula:
wherein the content of the first and second substances,
AS is the value of said adaptability, S 1 For the experimental water sample to pass through the presettingFiltration Rate of the Filter Membrane, S 0 The filtration rate and TU of the experimental water sample in the control experiment passing through the preset filter membrane 1 Is turbidity and TU of the experimental water sample 0 Is the turbidity and TDS of the experimental water sample in the control experiment 1 For the conductivity and TDS of the experimental water sample 0 Is the conductivity of the experimental water sample in the control experiment.
As an optional implementation manner of the embodiment of the present invention, the evaluation module is further configured to select, after obtaining the adaptability value of the experiment sample corresponding to each experiment scheme in the water inlet treatment, the experiment sample with the largest adaptability value in the experiment samples corresponding to each experiment scheme as the scale inhibitor for the water inlet.
As an optional implementation manner of the embodiment of the present invention, the calculation module is specifically configured to obtain an evaluation parameter of an experimental water sample of each group of parallel experiments under the condition that a plurality of groups of parallel experiments are set in each experimental scheme; and obtaining the average value of the evaluation parameters of the experimental water samples of the multiple groups of parallel experiments set under each experimental scheme as the evaluation parameters of the experimental water samples of each experimental scheme.
The embodiment of the invention provides a scale inhibitor evaluation method, which comprises the steps of firstly detecting the water quality of inlet water, obtaining the water quality index of the inlet water, determining at least one target scale inhibitor suitable for the water quality index according to the water quality index, then obtaining concentrated water generated by the inlet water through a nanofiltration system as test raw water, preparing experimental water samples of a plurality of experimental schemes by reacting the test raw water with the experimental samples corresponding to the experimental schemes under preset reaction conditions, wherein the concentrations and/or the types of the target scale inhibitors in the experimental samples are different, thus obtaining the evaluation parameters of the experimental water samples of the experimental schemes, and evaluating the adaptability of the experimental samples corresponding to the experimental schemes in the inlet water treatment according to the evaluation parameters. According to the scale inhibitor evaluation method provided by the embodiment of the invention, firstly, a proper target scale inhibitor is selected by detecting the water quality index of inlet water, an experiment can be performed on the selected target scale inhibitor, unnecessary energy and experiment consumables are avoided, concentrated water generated by treatment of a nanofiltration system is obtained as test raw water, the concentrations of metal ions and acid radical ions dissolved in the concentrated water are very high, the stability of the target scale inhibitor in the concentrated water can be fully detected by taking the concentrated water as the test raw water to react with an experiment sample configured by the target scale inhibitor, the adaptability of the target scale inhibitor is evaluated by obtaining the evaluation parameters of the experiment water samples under a plurality of experiment schemes through obtaining the evaluation parameters of the experiment samples, the comprehensiveness and objectivity of the evaluation are improved, and the concentration and/or type of the target scale inhibitor in each experiment sample are different, so that the target scale inhibitor with the best adaptability in corresponding drinking water treatment and the best use concentration of the target scale inhibitor in the corresponding drinking water treatment can be determined.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a flowchart illustrating the steps of a method for evaluating a scale inhibitor according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating the steps of a method for evaluating a scale inhibitor according to another embodiment of the present invention;
fig. 3 is a block diagram of a scale inhibitor evaluation apparatus according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention may be more clearly understood, a solution of the present invention will be further described below. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein; it is to be understood that the embodiments described in this specification are only some embodiments of the invention, and not all embodiments.
The terms "first" and "second," and the like, in the description and in the claims of the present invention are used for distinguishing objects that are synchronized, and are not used for describing a particular order of the objects. For example, the first volume and the second volume are for distinguishing between different volumes, and are not used to describe a particular order or size of the volumes.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the words "exemplary" or "such as" are intended to present concepts in a concrete fashion, and in the description of embodiments of the present invention, the meaning of "a plurality" means two or more unless otherwise indicated.
Referring to fig. 1, an embodiment of the present invention provides a method for evaluating a scale inhibitor, including the following steps S101 to S106:
s101, detecting the quality of inlet water to obtain the quality index of the inlet water.
Wherein, the water quality index comprises the concentration of preset ions and the water quality environment.
Optionally, the preset ions include: at least one of aluminum ions, iron ions, zinc ions, silicate ions, and phosphate ions, the aqueous environment comprising: at least one of a pH, alkalinity, and temperature of the influent water.
Specifically, the preset ions may be ions dissolved in the intake water, which may cause scaling, including but not limited to the above-mentioned metal cations and acid ions, and since the adaptability of the scale inhibitor in the intake water treatment is related to the ions dissolved in the intake water and the pH, alkalinity, temperature, and the like of the intake water, a target scale inhibitor suitable for the intake water treatment may be selected for the experiment by detecting the water quality index of the intake water, thereby reducing the amount of the experiment and avoiding wasting unnecessary energy and experimental consumables.
S102, determining at least one target antisludging agent according to the water quality index.
Wherein the target scale inhibitor is a scale inhibitor suitable for the water quality index.
Specifically, the selected target scale inhibitors are all scale inhibitors which have acquired 'permission batches for sanitation and safety of drinking water products', and can be applied to a nanofiltration system for drinking water treatment, wherein the scale inhibitors in the nanofiltration system have the function of inhibiting the crystallization precipitation of acid radical ions and metal cations in water, so that the formation of crystal nuclei can be inhibited, and the formed crystal nuclei can generate lattice distortion and are difficult to grow, and therefore, even if the ions dissolved in the water are crystallized to form micro particles, the micro particles are difficult to further agglomerate and settle, so that the filter membrane in the nanofiltration system is prevented from being blocked.
S103, obtaining raw test water.
Wherein the test raw water is concentrated water generated by treating the inlet water by a nanofiltration system.
Specifically, the concentrated water generated by the inlet water treated by the nanofiltration system can be directly collected as the test raw water, or the water quality of the corresponding nanofiltration concentrated water can be calculated by nanofiltration calculation software according to the water quality index of the inlet water, and the simulated concentrated water is prepared as the test raw water according to the calculation result. Because the concentration of metal ions and acid radical ions in the nanofiltration concentrated water is very high, the possibility of losing the scale inhibitor is the greatest, and if the scale inhibitor can be kept stable in the concentrated water, the scale inhibitor can be kept stable and not inactivated in the inlet water treatment with the lower concentration of the metal ions and the acid radical ions.
And S104, preparing experimental water samples of a plurality of experimental schemes.
The experimental water sample of each experimental scheme is an aqueous solution obtained by reacting the test raw water with the experimental sample corresponding to each experimental scheme under a preset reaction condition, and the concentration and/or the type of the target scale inhibitor in the experimental sample corresponding to each experimental scheme are different;
optionally, the preset reaction conditions include: the reaction is carried out for at least 10 hours under the condition that the stirring speed is 200-300 r/min.
Specifically, the experimental sample may be a solid scale inhibitor or a liquid scale inhibitor, or an aqueous solution of a preset concentration prepared by dissolving the solid scale inhibitor in pure water, or an aqueous solution of a scale inhibitor prepared by diluting a stock solution of the liquid scale inhibitor with pure water to a preset concentration, for example, the concentration is diluted to 10% of the stock solution, and a multiple stirrer may be used to stir the test raw water and the experimental sample corresponding to each experimental scheme.
It should be noted that, firstly, the solid scale inhibitor is prepared into an aqueous solution with a preset concentration or the liquid scale inhibitor is diluted into an aqueous solution with a preset concentration, and then the aqueous solution is added into the test raw water for reaction, so that the feeding amount of the scale inhibitor is easier to accurately control, the reaction temperature is controlled within a preset range, the test raw water and a corresponding experimental sample are reacted for at least 10 hours under the condition that the stirring speed is 200-300 r/min, and the purpose is to ensure that ions dissolved in the test raw water are in full contact reaction with the added target scale inhibitor, so that the scaling degree is maximum. Because the types of the target scale inhibitors selected in the experimental schemes are different, and the concentrations of the target scale inhibitors are different under the condition that the types of the target scale inhibitors are the same, the target scale inhibitor with the best adaptability in drinking water treatment can be determined, and the optimal use concentration of the target scale inhibitor can also be determined.
And S105, obtaining evaluation parameters of the experimental water samples of the experimental schemes.
Optionally, turbidity and conductivity of the experimental water sample of each experimental scheme are obtained, so that the experimental water sample of each experimental scheme passes through the preset filter membrane, and the filtration rate of the experimental water sample of each experimental scheme passing through the preset filter membrane is obtained.
Specifically, can be with the experimental sample water of predetermined volume in having the closed container who predetermines the filter membrane, make experimental water sample all through predetermineeing the filter membrane through applying corresponding pressure, the size of applying pressure depends on the specification of predetermineeing the filter membrane itself. The optical property and the electrical property of the experimental water sample obtained after the stirring reaction can be detected to judge the concentration of the ions in the experimental water sample, wherein the optical property can be the turbidity of the experimental water sample, and the electrical property can be the conductivity of the experimental water sample. When the adaptability or the scale inhibition effect of the scale inhibitor is poor, the scale inhibitor may react with other medicaments to form sediments, or may not inhibit ions dissolved in water from crystallizing and separating out, so that the conductivity of the solution is reduced, the turbidity is increased, membrane pores of a preset filter membrane are blocked in the filtering process, and the filtering speed is reduced.
The preset filter membrane used in the invention includes but is not limited to a micro-filtration membrane, an ultrafiltration membrane, a nanofiltration membrane, or a filter membrane model with fixed specification is directly sold, for example, a micro-filtration membrane with the specification of 47mm of membrane diameter and 0.2 μm of pore diameter is sold.
Optionally, the filtration rate of the experimental water sample passing through the preset filter membrane according to each experimental scheme can be obtained according to the following formula:
wherein S is the filtration rate, V is the volume of the experiment water sample, d is the diameter of the preset filter membrane, and t is the time length of the experiment water sample passing through the preset filter membrane.
The larger the value of S is, the smaller the degree of blockage of the membrane pores of the preset filter membrane is, and the better the scale inhibition effect of the corresponding target scale inhibitor is.
And S106, evaluating the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment according to the evaluation parameters.
Optionally, the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment is obtained according to the evaluation parameters of the experimental water sample of each experimental scheme and the evaluation parameters of the control experiment corresponding to each experimental scheme.
Specifically, for more direct description of the scale inhibition effect of the target scale inhibitor in water treatment, a control experiment may be set, the experiment is divided into n groups according to the different types or dosage of the scale inhibitor, n +1 reaction vessels with preset volumes, for example, 1000ml beakers are taken, n +1 test raw water with preset volumes are respectively added into the (n + 1) beakers, the value of the preset volume should be smaller than or equal to the value of the preset volume, a first volume of the experiment sample is added into the n beakers, the remaining 1 beaker is used as a blank control group, a second volume of pure water is added, the first volume is equal to the second volume, and the mixture in the (n + 1) beakers is reacted under the same reaction conditions, so as to obtain the evaluation parameters of the experimental water sample and the evaluation parameters of the control experiment corresponding to each experimental scheme.
The embodiment of the invention provides a scale inhibitor evaluation method, which comprises the steps of firstly detecting the quality of inlet water, obtaining the water quality index of the inlet water, determining at least one target scale inhibitor suitable for the water quality index according to the water quality index, then obtaining concentrated water generated by the inlet water after being treated by a nanofiltration system as test raw water, preparing experimental water samples of a plurality of experimental schemes by reacting the test raw water with experimental samples with different concentrations and/or types of the target scale inhibitors corresponding to the experimental schemes under preset reaction conditions, thus obtaining the evaluation parameters of the experimental water samples of the experimental schemes, and evaluating the adaptability of the experimental samples corresponding to the experimental schemes in the inlet water treatment according to the evaluation parameters. According to the scale inhibitor evaluation method provided by the embodiment of the invention, firstly, a proper target scale inhibitor is selected by detecting the water quality index of inlet water, so that the experimental amount can be reduced, unnecessary energy and experimental consumables are avoided, concentrated water generated by treatment of a nanofiltration system is obtained as test raw water, the concentration of metal ions and acid radical ions dissolved in the concentrated water is very high, the stability of the target scale inhibitor in the concentrated water can be fully detected by reacting the concentrated water as the test raw water with an experimental sample configured by the target scale inhibitor, and the optimal use concentrations of the target scale inhibitor and the target scale inhibitor with the best adaptability in corresponding drinking water treatment can be determined by comprehensively evaluating the adaptability of the target scale inhibitor by obtaining the evaluation parameters of the experimental water samples under a plurality of experimental schemes because the concentrations and/or the types of the target scale inhibitors are different.
Optionally, as shown in fig. 2, on the basis of the steps S101 to S105, the method for evaluating an antisludging agent according to the embodiment of the present invention includes a step S106a.
And S106a, acquiring the adaptability value.
And acquiring the adaptability value according to the following formula, and determining the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment through the acquired adaptability value.
Wherein the content of the first and second substances,
AS is the value of said adaptability, S 1 The filtration rate and S of the experiment water sample passing through the preset filter membrane 0 The filtration rate and TU of the experimental water sample in the control experiment passing through the preset filter membrane 1 Is turbidity and TU of the experimental water sample 0 Is the turbidity and TDS of the experimental water sample in the control experiment 1 Is the conductivity, TDS of the experimental water sample 0 Is the conductivity of the experimental water sample in the control experiment.
Specifically, in the experiment for n experimental samples, when three values of X, Y, and Z obtained from one of the experimental samples are all the highest, the target scale inhibitor corresponding to the experimental sample at the concentration is more in line with the actual requirement. When the three values of X, Y and Z of each experimental sample are mutually different, the average value of X, Y and Z is taken, and the target scale inhibitor with higher average value is more in line with the actual requirement at the corresponding concentration, namely the larger the value of AS is, the better the adaptability of the target scale inhibitor in the water inlet treatment at the concentration is.
Optionally, in order to reduce the experiment error, multiple sets of parallel experiments are set under each experiment scheme, the evaluation parameters of the experiment water sample of each set of parallel experiments are obtained, and the average value of the evaluation parameters of the experiment water samples of the multiple sets of parallel experiments set under each experiment scheme is obtained and used as the evaluation parameters of the experiment water sample of each experiment scheme.
Specifically, referring to table 1 below, A, B, C, N represents different experimental schemes, three sets of parallel experiments may be set in each experimental scheme, and the average value of the evaluation parameters of the experimental water samples of the multiple sets of parallel experiments set in each experimental scheme is shown in table 2 below.
TABLE 1
TABLE 2
Optionally, after obtaining the adaptive value of the experimental sample corresponding to each experimental protocol in the water inlet treatment, the following step S107 is performed.
S107, selecting the experimental sample with the maximum adaptability value from the experimental samples corresponding to the experimental schemes as the scale inhibitor of the inlet water.
Specifically, when the value of the adaptability is the maximum, the stability of the experimental sample in the water inlet treatment process is the best, and the function of preventing scaling is larger.
Based on the same inventive concept, as an implementation of the foregoing method, an embodiment of the present invention further provides a scale inhibitor evaluation apparatus, where an embodiment of the apparatus corresponds to the foregoing method embodiment, and details in the foregoing method embodiment are not repeated in this apparatus embodiment for convenience of reading, but it should be clear that the apparatus in this embodiment can correspondingly implement all the contents in the foregoing method embodiment.
Fig. 3 is a block diagram of a scale inhibitor evaluation apparatus according to an embodiment of the present invention, and as shown in fig. 3, a scale inhibitor evaluation apparatus 300 according to the embodiment includes:
the detection module 301 is configured to detect water quality of intake water, and obtain a water quality index of the intake water, where the water quality index includes a concentration of a preset ion and a water quality environment;
a determining module 302, configured to determine at least one target scale inhibitor according to the water quality indicator, where the target scale inhibitor is a scale inhibitor suitable for the water quality indicator;
the acquisition module 303 is configured to acquire test raw water, where the test raw water is concentrated water generated by treatment of the influent water by a nanofiltration system;
the preparation module 304 is configured to prepare a plurality of experimental water samples of experimental schemes, where an experimental water sample of each experimental scheme is an aqueous solution obtained by reacting the test raw water with an experimental sample corresponding to each experimental scheme under a preset reaction condition, and the concentrations and/or types of the target scale inhibitors in the experimental samples corresponding to each experimental scheme are different;
a calculating module 305, configured to obtain evaluation parameters of the experimental water samples of each experimental scheme;
and the evaluation module 306 is configured to evaluate the adaptability of the experiment sample corresponding to each experiment scheme in the water inlet treatment according to the evaluation parameters.
As an optional implementation manner of the embodiment of the present invention, the preset ions include: at least one of aluminum ion, iron ion, zinc ion, silicate ion, and phosphate ion;
the water quality environment comprises: at least one of a pH, alkalinity, and temperature of the influent water.
As an optional implementation manner of the embodiment of the present invention, the preset reaction condition includes:
the reaction is carried out for at least 10 hours under the condition that the stirring speed is 200-300 r/min.
As an optional implementation manner of the embodiment of the present invention, the calculation module 305 is specifically configured to obtain turbidity and conductivity of the experimental water samples of each experimental scheme; and acquiring the filtration rate of the experiment water sample of each experiment scheme through the preset filter membrane under the condition that the experiment water sample of each experiment scheme passes through the preset filter membrane.
As an optional implementation manner of the embodiment of the present invention, the calculation module 305 is specifically configured to obtain a filtration rate of the experimental water sample passing through the preset filtration membrane according to the following formula:
wherein S is the filtration rate, V is the volume of the experiment water sample, d is the diameter of the preset filter membrane, and t is the time length of the experiment water sample passing through the preset filter membrane.
As an optional implementation manner of the embodiment of the present invention, the evaluation module 306 is specifically configured to obtain, according to the evaluation parameters of the experimental water sample of each experimental scheme and the evaluation parameters of the control experiment corresponding to each experimental scheme, the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment.
As an optional implementation manner of the embodiment of the present invention, the evaluation module 306 is specifically configured to obtain the value of the adaptability according to the following formula:
wherein the content of the first and second substances,
AS is the value of said adaptability, S 1 The filtration rate and S of the experiment water sample passing through the preset filter membrane 0 The filtration rate and TU of the experimental water sample in the control experiment passing through the preset filter membrane 1 Is turbidity and TU of the experimental water sample 0 Is the turbidity and TDS of the experimental water sample in the control experiment 1 Is the conductivity, TDS of the experimental water sample 0 Is the conductivity of the experimental water sample in the control experiment.
As an optional implementation manner of the embodiment of the present invention, the calculation module 305 is specifically configured to obtain an evaluation parameter of an experimental water sample of each group of parallel experiments under the condition that a plurality of groups of parallel experiments are set in each experimental scheme; and obtaining the average value of the evaluation parameters of the experimental water samples of the multiple groups of parallel experiments set under each experimental scheme as the evaluation parameters of the experimental water samples of each experimental scheme.
As an optional implementation manner of the embodiment of the present invention, the evaluation module 306 is further configured to select, after obtaining the adaptability value of the experiment sample corresponding to each experiment scheme in the water inlet treatment, the experiment sample with the largest adaptability value in the experiment samples corresponding to each experiment scheme as the scale inhibitor for the water inlet.
When the scale inhibitor evaluation device provided by the embodiment of the invention is used for realizing the scale inhibitor evaluation method, firstly, the quality of inlet water is detected, the water quality index of the inlet water is obtained, at least one target scale inhibitor suitable for the water quality index is determined according to the water quality index, then, concentrated water generated by the inlet water after being processed by a nanofiltration system is obtained as test raw water, the test raw water and the experimental samples corresponding to the experimental schemes are reacted under the preset reaction condition to prepare the experimental water samples of a plurality of experimental schemes, the concentrations and/or the types of the target scale inhibitors in the experimental samples are different, so that the evaluation parameters of the experimental water samples of the experimental schemes are obtained, and the adaptability of the experimental samples corresponding to the experimental schemes in the inlet water treatment is evaluated according to the evaluation parameters. According to the scale inhibitor evaluation method provided by the embodiment of the invention, the appropriate target scale inhibitor is selected by detecting the water quality index of the inlet water, the selected target scale inhibitor can be tested, unnecessary energy and test consumables are avoided, the concentrated water generated by the treatment of the nanofiltration system is obtained as the test raw water, the concentration of metal ions and acid radical ions dissolved in the concentrated water is very high, the stability of the target scale inhibitor in the concentrated water can be fully detected by reacting the concentrated water as the test raw water with the test sample configured by the target scale inhibitor, the adaptability of the target scale inhibitor is evaluated by the obtained evaluation parameters through obtaining the evaluation parameters of the test water samples under a plurality of experimental schemes, the comprehensiveness and objectivity of the evaluation are improved, and the concentration and/or the type of the target scale inhibitor in each test sample are different, so that the target scale inhibitor with the best adaptability in the corresponding drinking water treatment and the best use concentration of the target scale inhibitor in the corresponding drinking water treatment can be determined.
The scale inhibitor evaluation device provided by the embodiment can execute the scale inhibitor evaluation method provided by the method embodiment, the implementation principle and the technical effect are similar, and the details are not repeated here.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A method for evaluating a scale inhibitor, comprising:
detecting the quality of inlet water to obtain the quality index of the inlet water, wherein the quality index comprises the concentration of preset ions and the water quality environment;
determining at least one target scale inhibitor according to the water quality index, wherein the target scale inhibitor is a scale inhibitor suitable for the water quality index;
obtaining test raw water, wherein the test raw water is concentrated water generated by the inlet water through the nanofiltration system;
preparing a plurality of experimental water samples of experimental schemes, wherein the experimental water sample of each experimental scheme is an aqueous solution obtained by reacting the test raw water with the experimental sample corresponding to each experimental scheme under a preset reaction condition, and the concentration and/or the type of the target scale inhibitor in the experimental sample corresponding to each experimental scheme are different;
obtaining evaluation parameters of the experimental water samples of the experimental schemes;
evaluating the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment according to the evaluation parameters;
the method for acquiring the evaluation parameters of the experimental water samples of the experimental schemes comprises the following steps:
obtaining the turbidity and the conductivity of an experimental water sample of each experimental scheme;
enabling the experimental water sample of each experimental scheme to pass through a preset filter membrane, and acquiring the filtration rate of the experimental water sample of each experimental scheme passing through the preset filter membrane;
the method for evaluating the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment according to the evaluation parameters comprises the following steps:
obtaining a value of the adaptability according to the following formula:
wherein the content of the first and second substances,
AS is the value of said adaptability, S 1 The filtration rate and S of the experiment water sample passing through the preset filter membrane 0 The filtration rate and TU of the experimental water sample passing through the preset filter membrane in the control experiment 1 Is turbidity and TU of the experimental water sample 0 Is the turbidity and TDS of the experimental water sample in the control experiment 1 Is the conductivity, TDS of the experimental water sample 0 Is the conductivity of the experimental water sample in the control experiment.
2. The method of claim 1,
the preset ions include: at least one of aluminum ion, iron ion, zinc ion, silicate ion, and phosphate ion;
the water quality environment comprises: at least one of a pH, alkalinity, and temperature of the influent water.
3. The method of claim 1, wherein the predetermined reaction conditions comprise:
the reaction is carried out for at least 10 hours under the condition that the stirring speed is 200-300 r/min.
4. The method as claimed in claim 1, wherein the step of obtaining the filtration rate of the experimental water sample of each experimental scheme through the preset filtration membrane comprises:
the filtration rate of the experimental water sample passing through the preset filter membrane in each experimental scheme is obtained according to the following formula:
the method comprises the following steps of obtaining an experiment water sample, wherein S is the filtration rate, V is the volume of the experiment water sample, d is the diameter of a preset filter membrane, and t is the time length of the experiment water sample passing through the preset filter membrane.
5. The method of claim 1, further comprising:
after the adaptability values of the experimental samples corresponding to the experimental schemes in the water inlet treatment are obtained, the experimental sample with the maximum adaptability value in the experimental samples corresponding to the experimental schemes is selected as the scale inhibitor of the water inlet.
6. The method according to any one of claims 1 to 5, wherein the obtaining of the evaluation parameters of the experimental water samples of each experimental protocol comprises:
setting a plurality of groups of parallel experiments under each experimental scheme, and acquiring evaluation parameters of experimental water samples of each group of parallel experiments;
and acquiring the average value of the evaluation parameters of the experimental water samples of the multiple groups of parallel experiments set under each experimental scheme as the evaluation parameters of the experimental water samples of each experimental scheme.
7. An antisludging agent evaluation device, characterized by comprising:
the system comprises a detection module, a detection module and a control module, wherein the detection module is used for detecting the quality of inlet water to obtain the quality index of the inlet water, and the quality index comprises the concentration of preset ions and the water quality environment;
the determination module is used for determining at least one target scale inhibitor according to the water quality index, wherein the target scale inhibitor is a scale inhibitor suitable for the water quality index;
the acquisition module is used for acquiring test raw water, and the test raw water is concentrated water generated by the inlet water treated by the nanofiltration system;
the preparation module is used for preparing a plurality of experimental water samples of experimental schemes, the experimental water sample of each experimental scheme is an aqueous solution obtained by reacting the test raw water with the experimental sample corresponding to each experimental scheme under a preset reaction condition, and the concentration and/or the type of the target scale inhibitor in the experimental sample corresponding to each experimental scheme are different;
the calculation module is used for acquiring evaluation parameters of the experimental water samples of the experimental schemes;
the evaluation module is used for evaluating the adaptability of the experimental sample corresponding to each experimental scheme in the water inlet treatment according to the evaluation parameters;
the calculation module is specifically used for acquiring the turbidity and the conductivity of the experimental water sample of each experimental scheme; enabling the experimental water samples of the experimental schemes to pass through a preset filter membrane, and acquiring the filtering rate of the experimental water samples of the experimental schemes through the preset filter membrane;
the evaluation module is specifically configured to obtain the value of the adaptability according to the following formula:
wherein, the first and the second end of the pipe are connected with each other,
AS is the value of said adaptability, S 1 For the experimental water sampleFiltration rate through the pre-set filter membrane, S 0 The filtration rate and TU of the experimental water sample passing through the preset filter membrane in the control experiment 1 Is turbidity and TU of the experimental water sample 0 Is the turbidity and TDS of the experimental water sample in the control experiment 1 Is the conductivity, TDS of the experimental water sample 0 Is the conductivity of the experimental water sample in the control experiment.
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