CN114560571A - Solid slow-release scale inhibition material and preparation method thereof - Google Patents
Solid slow-release scale inhibition material and preparation method thereof Download PDFInfo
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- CN114560571A CN114560571A CN202210122908.4A CN202210122908A CN114560571A CN 114560571 A CN114560571 A CN 114560571A CN 202210122908 A CN202210122908 A CN 202210122908A CN 114560571 A CN114560571 A CN 114560571A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses a solid slow-release scale inhibition material and a preparation method thereof. The paint is prepared from the following components in percentage by weight: 30-80% of scale inhibitor, 5-40% of filler, 5-15% of inorganic silicate binder and 5-15% of organic binder. The scale inhibition active ingredients are immobilized on the base material to prepare the solid scale inhibitor, then the inorganic silicate binder and the organic binder are mixed for binary granulation, the inorganic silicate binder creates a micropore slow release structure, the granulated solid particles are ensured not to collapse after being soaked in water for a long time, and the organic binder controls the slow and stable release of the scale inhibition active ingredients by microcosmically wrapping the solid particles, so that the long-acting scale inhibition function is achieved. The solid slow-release scale inhibiting material has a high-efficiency long-life scale inhibiting effect, effectively reduces the cost of frequent feeding, and solves the problem that the solid scale inhibitor cannot be disintegrated to cause secondary pollution after being soaked for a long time.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a solid slow-release scale inhibition material and a preparation method thereof.
Background
Water containing many minerals such as calcium and magnesium salts in nature is called "hard water". After the water is boiled, part of water is evaporated, and insoluble calcium sulfate is separated out. Soluble calcium bicarbonate and magnesium bicarbonate are decomposed in boiling water to release carbon dioxide, and insoluble calcium carbonate and magnesium hydroxide precipitate are generated, and sometimes magnesium carbonate is generated, namely the scale. The scale is usually cemented on the surface of the container or the pipeline, the heat conductivity is poor, the heat transfer condition of the heating surface is worsened, thereby wasting fuel or electric power, and the danger of explosion or even explosion of the water heater and the boiler is greatly increased due to thermal expansion and cooling and uneven stress. The scale fragments enter the stomach and react with hydrochloric acid to release calcium and magnesium ions, so that the risk of calculus is increased, carbon dioxide makes people feel flatulence and uncomfortable, and gastric perforation of gastric ulcer patients is possible.
The scale inhibitor is a medicament which can disperse insoluble inorganic salt in water, prevent or interfere the precipitation and scaling of the insoluble inorganic salt on the metal surface, and maintain good heat transfer effect of metal equipment. The scale inhibitor has three action mechanisms of chelating, dispersing and lattice distortion, is mainly used for reverse osmosis and hot water scale inhibition, and is mainly liquid and soluble solid in the traditional scale inhibitor, so that the scale inhibitor needs to be put in according to the amount on time when in use, and the labor cost is greatly increased. In order to reduce labor cost, a small amount of solid slightly-soluble scale inhibitor is also available in the market.
Common scale inhibitors are liquid and have strong water solubility, and cannot effectively meet the requirements of numerous water treatment application scenes. Therefore, the development demand of the solid slow-release scale inhibition material is huge. The solid slow-release scale inhibition material is particularly key in the performances of bubble resistance, scouring resistance and no collapse because of being soaked in water for a long time; meanwhile, the key to controlling the service life of the scale inhibition granular material is to control the slow release performance of the scale inhibition active ingredients.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a solid slow-release scale inhibiting material which has low release amount, long service life and good scale inhibiting effect and can avoid the problem of secondary pollution caused by long-term soaking and disintegration of a solid scale inhibitor and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a solid slow-release scale inhibition material is prepared from the following components in percentage by weight: 30-80% of scale inhibitor, 5-40% of filler, 5-15% of inorganic silicate binder and 5-15% of organic binder.
Preferably, in the solid slow-release scale inhibition material, the scale inhibitor consists of 50-90% of scale inhibition active ingredients and 10-50% of base materials.
Preferably, in the solid slow-release scale inhibiting material, the scale inhibiting active component is one or a combination of an organic phosphorus scale inhibitor, a polycarboxylic acid dispersant and a triazole scale inhibitor.
Preferably, in the above solid slow-release scale inhibiting material, the base material is diatomite, zeolite powder or activated carbon.
Preferably, in the above solid slow-release scale inhibiting material, the inorganic silicate binder is sodium silicate, potassium silicate or lithium silicate.
Preferably, in the solid slow-release scale inhibiting material, the organic binder is polyvinyl alcohol, epoxy resin or polyurethane.
Preferably, in the above solid slow-release scale-inhibiting material, the filler is titanium dioxide, talc powder, calcium carbonate or barium sulfate.
The preparation method of the solid slow-release scale inhibiting material comprises the following steps:
(1) pretreating the base material to enhance the adsorption capacity and enable the base material to have molecular binding force;
(2) soaking the pretreated base material in a scale inhibition active component, and fixedly carrying the scale inhibition active component in micropores of the base material to obtain a scale inhibitor;
(3) uniformly mixing the scale inhibitor, the filler and the inorganic silicate binder;
(4) drying the mixture obtained in the step (3);
(5) and (4) adding the dried mixture obtained in the step (4) into an organic binder for molding.
Compared with the prior art, the invention has the following beneficial effects: the scale inhibition activity is divided into that the solid scale inhibitor is supported on the base material to prepare the solid scale inhibitor, then the inorganic silicate binder and the organic binder are mixed for binary granulation, the inorganic silicate binder creates a micropore slow release structure to ensure that the granulated solid particles are not collapsed after being soaked in water for a long time, and the organic binder controls the slow and stable release of the scale inhibition active component by microcosmically wrapping the solid particles, so that the long-acting scale inhibition function is achieved. The solid slow-release scale inhibiting material has a high-efficiency long-life scale inhibiting effect, effectively reduces the cost of frequent feeding, and solves the problem that the solid scale inhibitor cannot be disintegrated to cause secondary pollution after being soaked for a long time.
Drawings
FIG. 1 is a graph comparing the total phosphorus in a sample soaking process;
fig. 2 is a graph comparing the samples soaked with tds.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.
Example 1: preparing scale inhibitor powder:
pretreatment of the substrate: respectively soaking zeolite powder and diatomite in hydrochloric acid solution, cleaning, filtering, drying, and calcining at 800 ℃ for 2 h;
2-phosphate-1, 2, 4-butane tricarboxylate (PBTCA) and polyepoxysuccinic acid (PESA) are selected as the scale inhibition active ingredients, and the specific method is as follows:
weighing 2 kg of pretreated zeolite powder, soaking the zeolite powder in 4L of PBTCA for 4h, fully adsorbing the zeolite powder, filtering the adsorbed zeolite powder, and drying the zeolite powder at 80 ℃ to obtain solid scale inhibitor powder A;
weighing 2 grams of pretreated diatomite, soaking the diatomite in 4 liters of PESA for 4 hours, fully adsorbing the diatomite, filtering the diatomite, drying the diatomite at 80 ℃, and marking the diatomite as solid scale inhibitor powder B.
Example 2: preparing a solid slow-release scale inhibiting material by adopting a single binder:
weighing 600 g of solid scale inhibitor powder A and 200 g of titanium dioxide, uniformly mixing, adding 200 g of 10% polyvinyl alcohol solution and a proper amount of water, stirring to be dough-like, forming, and baking the formed particles for 2 hours at 120 ℃ to obtain a solid slow-release scale inhibiting material A1;
Weighing 600 g of solid scale inhibitor powder A and 200 g of titanium dioxide, uniformly mixing, adding a sodium silicate solution containing 200 g of water glass, fully stirring to uniformly mix, drying at 80 ℃, adding a proper amount of water, stirring to be dough-like, forming, and baking the formed particles for 2 hours at 120 ℃ to obtain the solid slow-release scale inhibiting material A2.
Example 3: preparing a solid slow-release scale inhibiting material by adopting a binary mixed binder:
weighing 600 g of solid scale inhibition powder A and 200 g of titanium dioxide, uniformly mixing, adding 100 g of sodium silicate solution containing water glass, fully stirring until the mixture is uniformly mixed, and drying at 80 ℃;
adding 100 g of 10% polyvinyl alcohol solution and a proper amount of water into the dried materials, stirring the mixture into a dough shape, forming, and baking the formed particles for 2 hours at 120 ℃ to obtain the solid slow-release scale inhibiting material A3.
Example 4: preparing a solid slow-release scale inhibiting material by adopting a single binder:
weighing 600 g of solid scale inhibiting powder B and 200 g of talcum powder, uniformly mixing, adding 200 g of polyurethane and a proper amount of water, stirring to be dough-shaped, forming, and baking the formed particles for 2 hours at 120 ℃ to obtain a solid slow-release scale inhibiting material B1;
weighing 600 g of solid scale inhibiting powder B and 200 g of talcum powder, uniformly mixing, adding a sodium silicate solution containing 200 g of water glass, fully stirring until uniform mixing, drying at 80 ℃, adding a proper amount of water, stirring until the mixture is dough-like, forming, and baking the formed particles for 2 hours at 120 ℃ to obtain the solid slow-release scale inhibiting material B2.
Example 5: preparing a solid slow-release scale inhibiting material by adopting a binary mixed binder:
weighing 600 g of solid scale inhibition powder B and 200 g of talcum powder, uniformly mixing, adding a sodium silicate solution containing 100 g of water glass, fully stirring until the mixture is uniformly mixed, and drying at 80 ℃;
and adding 100 g of polyurethane and a proper amount of water into the dried material, stirring the mixture into a dough shape, forming, and baking the formed particles for 2 hours at 120 ℃ to obtain the solid slow-release scale inhibiting material B3.
Example 6: comparison of Scale inhibition Performance
Weighing 10 g of each of scale inhibition samples A1, A2, A3, B1, B2 and B3 to carry out scale inhibition performance test, wherein the test results are as follows:
TABLE 1 Scale inhibition Performance test of solid Scale inhibitor powder A series
TABLE 2 Scale inhibition Performance test of solid Scale inhibitor powder B series
From the test results, the particles of the test samples A1 and B1 adopting the single organic binder collapse into powder after being flushed by 2000L water, the release speed of the scale inhibitor of the test samples A2 and B2 adopting the single inorganic silicate binder is too high, the scale inhibition life is extremely short, and the scale inhibition effect is basically not existed after being flushed by 3000L water, and the samples A3 and B3 adopting the mixture of the organic binder and the inorganic silicate binder can improve the water resistance of the particles, and can effectively control the release amount of the scale inhibitor to achieve the long-acting scale inhibition function.
Example 7: based on the pre-use condition of the reverse osmosis membrane, 6 g of each of the scale inhibition samples A1, A2 and A3 are weighed and soaked in 100ml of pure water for testing, tds and total phosphorus are tested every 1h, and the test results are shown in figures 1 and 2. As can be seen from the comparison curves of the figure 1 and the figure 2, the release amount of the active ingredients in the initial stage of soaking of the single inorganic system is too high, the duration is short, the release amount of the single organic system and the binary mixed system is stable, the release amount of the single organic system is higher than that of the binary mixed system along with the increase of the soaking time, and the particle collapse is consistent with that in the scale inhibition performance test.
Claims (8)
1. A solid slow-release scale inhibition material is characterized by being prepared from the following components in percentage by weight: 30-80% of scale inhibitor, 5-40% of filler, 5-15% of inorganic silicate binder and 5-15% of organic binder.
2. The solid slow-release scale inhibiting material of claim 1, wherein the scale inhibitor consists of scale inhibiting active components 50-90% and base material 10-50%.
3. The solid slow-release scale inhibiting material of claim 2, wherein the scale inhibiting active component is one or a combination of an organic phosphorus scale inhibitor, a polycarboxylic acid dispersant and a triazole scale inhibitor.
4. The solid slow-release scale inhibiting material of claim 2, wherein the substrate is diatomaceous earth, zeolite powder or activated carbon.
5. The solid slow-release scale inhibiting material of claim 1, wherein the inorganic silicate binder is sodium silicate, potassium silicate or lithium silicate water glass.
6. The solid slow-release scale inhibiting material of claim 1, wherein the organic binder is polyvinyl alcohol, epoxy resin or polyurethane.
7. The solid slow-release scale inhibiting material of claim 1, wherein the filler is titanium dioxide, talcum powder, calcium carbonate or barium sulfate.
8. The preparation method of the solid slow-release scale inhibiting material as claimed in claim 2, which is characterized by comprising the following steps:
(1) pretreating a base material;
(2) soaking the pretreated base material in a scale inhibition active component, and fixedly loading the scale inhibition active component in micropores of the base material to obtain a scale inhibitor;
(3) uniformly mixing the scale inhibitor, the filler and the inorganic silicate binder;
(4) drying the mixture obtained in the step (3);
(5) and (4) adding the dried mixture obtained in the step (4) into an organic binder for molding.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116675354A (en) * | 2022-10-28 | 2023-09-01 | 浙江净昕新材料科技有限公司 | Water friction polarization method, device and scale inhibition and removal efficiency thereof |
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