CN114751530A - Water treatment agent, preparation method and application thereof - Google Patents
Water treatment agent, preparation method and application thereof Download PDFInfo
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- CN114751530A CN114751530A CN202210259403.2A CN202210259403A CN114751530A CN 114751530 A CN114751530 A CN 114751530A CN 202210259403 A CN202210259403 A CN 202210259403A CN 114751530 A CN114751530 A CN 114751530A
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- water treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
- C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
Abstract
The invention provides a water treatment agent, and relates to the technical field of water treatment; the water treatment comprises the following components in parts by weight: 30-95 parts of active polymeric hydroxy carboxylate, 10-30 parts of sodium metaphosphate, 10-35 parts of sulfonated lignin and 1-5 parts of active starch. According to the water treatment agent provided by the invention, through the synergistic effect of the active polymeric hydroxycarboxylic acid salt, the sodium metaphosphate, the sulfonated lignin and the active starch, ions which are easy to scale and corrode in water can be removed by the water treatment agent, so that the problems of easy scaling and easy corrosion in the process of recycling waste water such as strong brine and reclaimed water are solved, and the service life of equipment is not influenced while water is saved.
Description
Technical Field
The invention relates to the technical field of water treatment, and particularly relates to a water treatment agent, a preparation method of the water treatment agent and application of the water treatment agent.
Background
With the increasing shortage of fresh water resources, many enterprises limit the water consumption; in order to save water, many enterprises need to recycle the concentrated brine and the reclaimed water in production.
The components of the strong brine and the reclaimed water are complex, so that the problem of equipment scaling is easy to occur when the strong brine is used; when the reclaimed water is used, phenomena such as pipeline corrosion and scaling are easy to occur, and the service life of equipment is influenced.
Disclosure of Invention
The invention solves the problem that the service life of equipment is easily influenced by the reuse of strong brine and reclaimed water.
In order to solve the problems, the invention provides a water treatment agent which comprises the following components in parts by weight: 30-95 parts of active polymeric hydroxy carboxylate, 10-30 parts of sodium metaphosphate, 10-35 parts of sulfonated lignin and 1-5 parts of active starch.
Optionally, the polymeric hydroxycarboxylic acid salt is obtained by reacting the following raw materials in parts by weight: 100 parts of humic acid, 30-50 parts of hydroxyl carboxylate and 30-50 parts of caustic soda.
Optionally, the salt of hydroxycarboxylic acid is selected from at least one of sodium tartrate and sodium citrate.
Optionally, the active starch is starch obtained by hydrolysis and enzymolysis.
Another object of the present invention is to provide a method for preparing the water treatment agent as described above, comprising the steps of:
s1: preparing a reactive polymeric hydroxycarboxylic acid salt;
s2: according to the weight parts, 30-95 parts of active polymeric hydroxycarboxylic acid salt, 10-30 parts of sodium metaphosphate, 10-35 parts of sulfonated lignin and 1-5 parts of active starch are mixed to obtain the water treatment agent.
Alternatively, preparing the active polymeric hydroxycarboxylic acid salt includes:
s11: adding 100 parts by weight of humic acid and 30-50 parts by weight of hydroxycarboxylic acid salt into a reaction kettle, stirring and heating to 130-150 ℃, and reacting for 1-3 hours to obtain a mixture;
s12: cooling the mixture to 60 ℃, adding 30-50 parts of caustic soda into the mixture, and stirring for 1-3 hours to obtain a block;
s13: and cooling the block to normal temperature, and crushing to 40 meshes to obtain the active polymeric hydroxycarboxylic acid salt.
It is a further object of the present invention to provide a use of the above water treatment agent in treatment of concentrated brine.
It is a further object of the present invention to provide a use of the water treatment agent as described above in the treatment of reclaimed water.
Compared with the prior art, the water treatment agent provided by the invention has the following advantages:
according to the water treatment agent provided by the invention, through the synergistic effect of the active polymeric hydroxycarboxylic acid salt, the sodium metaphosphate, the sulfonated lignin and the active starch, ions which are easy to scale and corrode in water can be removed by the water treatment agent, so that the problems of easy scaling and easy corrosion in the process of recycling waste water such as strong brine and reclaimed water are solved, and the service life of equipment is not influenced while water is saved.
Detailed Description
The following describes embodiments of the present invention in detail. The embodiments described below are exemplary and are intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one of ordinary skill in the art based on the embodiments of the present invention without inventive step fall within the scope of the present invention.
In order to solve the problem that the service life of equipment is easily influenced by the recycling of strong brine and reclaimed water, the invention provides a water treatment agent which comprises the following components in parts by weight: 30-95 parts of active polymeric hydroxy carboxylate, 10-30 parts of sodium metaphosphate, 10-35 parts of sulfonated lignin and 1-5 parts of active starch.
Wherein the active polymeric hydroxycarboxylic acid salt is rich in carboxyl, hydroxyl, carbonyl, quinonyl, methoxyl and other groups, and can complex easily-scaling ions (such as Ca) in water in the process of treating concentrated saline water, reclaimed water and the like2+、Mg2+、Fe2+Etc.), easily erodible ions (e.g., SO)4 2-、SiO3 2-、PO4 2-Etc.) and organic anions, organic cations, etc., and removing components which easily influence the service life of equipment, such as easily-scaling ions, easily-corroding ions, etc., in the water, so that the problems of scaling of the equipment, corrosion of pipelines, etc. are not easily caused in the recycling process of the treated strong brine and reclaimed water, and the service life of the equipment is not influenced while the water is saved.
Meanwhile, the water treatment agent is a powdery object, and the solubility of the active polymeric hydroxycarboxylic acid salt in water is not high, so that the water treatment effect is influenced; in order to improve the solubility of the active polymeric hydroxycarboxylic acid salt in water, sodium metaphosphate is used as a carrier of the active polymeric hydroxycarboxylic acid salt to improve the solubility; specifically, after the water treatment agent is added into water to be treated, sodium metaphosphate is dissolved to release metaphosphate ions; the metaphosphate ions are complexed with unsaturated bonds in the active polymeric hydroxycarboxylic acid salt, so that the solubility of the active polymeric hydroxycarboxylic acid salt in water is improved, the active polymeric hydroxycarboxylic acid salt can complex more ions, and the water treatment effect is improved.
Furthermore, the water treatment effect is ensured by adding the sulfonated lignin as a corrosion inhibitor and adding the active starch as a polymerization precipitator.
According to the water treatment agent provided by the invention, through the synergistic effect of the active polymeric hydroxycarboxylic acid salt, the sodium metaphosphate, the sulfonated lignin and the active starch, ions which are easy to scale and corrode in water can be removed by the water treatment agent, so that the problems of easy scaling and easy corrosion in the process of recycling waste water such as strong brine and reclaimed water are solved, and the service life of equipment is not influenced while water is saved.
The water treatment agent provided by the invention is non-toxic, non-corrosive and non-taste, and is an environment-friendly product.
In order to ensure the water treatment effect, the active polymeric hydroxycarboxylic acid salt is preferably obtained by reacting the following raw materials in parts by weight: 100 parts of humic acid, 30-50 parts of hydroxyl carboxylate and 30-50 parts of caustic soda.
The hydroxy carboxylate is used for increasing the hydroxyl and carboxyl in the active polymeric hydroxy carboxylate so as to increase the activity of the active polymeric hydroxy carboxylate and improve the water treatment effect.
The preferable hydroxycarboxylic acid salt is selected from at least one of sodium tartrate and sodium citrate.
The active starch is preferably starch obtained by hydrolysis and enzymolysis; the preparation method of the active starch can be the prior art, and the application does not limit the specific preparation method of the active starch.
Another object of the present invention is to provide a method for preparing the water treatment agent as described above, which comprises the steps of:
s1: preparing a reactive polymeric hydroxycarboxylic acid salt;
s2: according to the weight parts, 30-95 parts of active polymeric hydroxycarboxylic acid salt, 10-30 parts of sodium metaphosphate, 10-35 parts of sulfonated lignin and 1-5 parts of active starch are mixed to obtain the water treatment agent.
The preparation method of the water treatment agent is simple and easy to operate, and the prepared water treatment agent can remove easily-scaling ions, easily-corroding ions and the like in water through the synergistic effect of the active polymeric hydroxycarboxylic acid salt, the sodium metaphosphate, the sulfonated lignin and the active starch, so that the problems of easy scaling and easy corrosion in the recycling process of waste water such as strong brine, reclaimed water and the like are solved, and the service life of equipment is not influenced while water is saved.
The preparation of the active polymeric hydroxycarboxylic acid salts herein includes:
s11: adding 100 parts by weight of humic acid and 30-50 parts by weight of hydroxyl carboxylate into a reaction kettle, stirring and heating to 130-150 ℃, and reacting for 1-3 hours to obtain a mixture;
s12: cooling the mixture to 60 ℃, adding 30-50 parts of caustic soda into the mixture, and stirring for 1-3 hours to obtain a block;
s13: and cooling the block to normal temperature, and crushing to 40 meshes to obtain the active polymeric hydroxycarboxylic acid salt.
After adding caustic soda into the mixture, water is generated due to acid-base reaction, so that the product is agglomerated and becomes blocks; cooling and crushing the block to obtain the active polymeric hydroxycarboxylic acid salt.
Another object of the present invention is to provide an application of the above water treatment agent in the treatment of concentrated brine.
According to the invention, the water treatment agent is used for treating the strong brine, and ions which are easy to scale are removed from the strong brine through the synergistic effect of the active polymeric hydroxycarboxylic acid salt, the sodium metaphosphate, the sulfonated lignin and the active starch, so that when the treated strong brine is reused as make-up water of circulating water, the scaling problem of a heat exchanger and a pipeline is not easy to occur in a system, the utilization rate of the water is improved, the water cost is saved for enterprises, and the safe and stable operation of the system is ensured.
It is a further object of the present invention to provide a use of the water treatment agent as described above in the treatment of reclaimed water.
According to the invention, the strong brine is treated by the water treatment agent, and ions which are easy to scale and corrode in the strong brine are removed under the synergistic effect of the active polymeric hydroxycarboxylic acid salt, the sodium metaphosphate, the sulfonated lignin and the active starch, so that when the treated medium brine is reused as make-up water of circulating water, the phenomena of pipeline corrosion, scaling and the like are not easy to occur, the utilization rate of the water is improved, the water cost is saved for enterprises, and the safe and stable operation of a system is ensured.
The specific using method of the water treatment agent is that when strong brine or reclaimed water is used as circulating water for supplementing water, a quantitative water treatment agent is fully dissolved into water to be treated before supplementing, so that ions easy to scale and ions easy to corrode in the water are removed by the water treatment agent after complexing, and water treatment is realized.
Specifically, when the water treatment agent is preferably used for treating strong brine, the using amount of the water treatment agent is 20-30 g/ton of strong brine; when the reclaimed water is treated, the using amount of the water treatment agent is 25-40 g/ton of the reclaimed water.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below.
Example 1
The embodiment provides a preparation method of a water treatment agent, which comprises the following steps:
s11: adding 100 parts by weight of humic acid and 50 parts by weight of sodium tartrate into a reaction kettle, stirring and heating to 130-150 ℃, and reacting for 3 hours to obtain a mixture;
s12: cooling the mixture to 60 ℃, adding 30 parts of caustic soda into the mixture, and stirring for 1 hour to obtain a block;
s13: cooling the block to normal temperature, and crushing to 40 meshes to obtain active polymeric hydroxycarboxylic acid salt;
s2: according to the weight parts, 30 parts of active polymeric hydroxycarboxylic acid salt, 30 parts of sodium metaphosphate, 35 parts of sulfonated lignin and 5 parts of active starch are mixed to obtain the water treatment agent.
Example 2
The embodiment provides a preparation method of a water treatment agent, which comprises the following steps:
s11: adding 100 parts of humic acid and 40 parts of sodium tartrate into a reaction kettle, stirring and heating to 130-150 ℃, and reacting for 2 hours to obtain a mixture;
s12: cooling the mixture to 60 ℃, adding 40 parts of caustic soda into the mixture, and stirring for 2 hours to obtain a block;
s13: cooling the block to normal temperature, and crushing to 40 meshes to obtain active polymeric hydroxycarboxylic acid salt;
s2: according to the weight parts, 65 parts of active polymeric hydroxycarboxylic acid salt, 20 parts of sodium metaphosphate, 25 parts of sulfonated lignin and 3 parts of active starch are mixed to obtain the water treatment agent.
Example 3
The embodiment provides a preparation method of a water treatment agent, which comprises the following steps:
s11: adding 100 parts of humic acid and 30 parts of sodium citrate into a reaction kettle, stirring and heating to 130-150 ℃, and reacting for 1 hour to obtain a mixture;
s12: cooling the mixture to 60 ℃, adding 50 parts of caustic soda into the mixture, and stirring for 3 hours to obtain a block;
s13: cooling the block to normal temperature, and crushing to 40 meshes to obtain active polymeric hydroxycarboxylic acid salt;
s2: according to the weight parts, 95 parts of active polymeric hydroxycarboxylic acid salt, 10 parts of sodium metaphosphate, 10 parts of sulfonated lignin and 1 part of active starch are mixed to obtain the water treatment agent.
Application example 1
The water treatment agent prepared in the embodiment 3 is used for recycling reclaimed water of a power plant, and the reclaimed water treated by the water treatment agent is used as circulating water make-up water. Wherein the water quality parameters are shown in table 1:
TABLE 1
The coupon test experimental parameters are shown in table 2:
TABLE 2
The statistical table of the end difference is shown in tables 3 and 4:
TABLE 3
TABLE 4
The data in the table show that the stable end difference and the temperature difference are basically unchanged, which indicates that the system has no scaling phenomenon; by monitoring the hanging sheet, no corrosion phenomenon on the metal surface is found; the water treatment agent provided by the invention is proved to be capable of effectively adsorbing harmful ions in water, fundamentally solving the problems of corrosion and scaling and ensuring safe and stable operation of a system.
The disclosure is provided above, but the scope of the disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.
Claims (8)
1. The water treatment agent is characterized by comprising the following components in parts by weight: 30-95 parts of active polymeric hydroxy carboxylate, 10-30 parts of sodium metaphosphate, 10-35 parts of sulfonated lignin and 1-5 parts of active starch.
2. The water treatment agent according to claim 1, wherein the polymeric hydroxycarboxylic acid salt is obtained by reacting the following raw materials in parts by weight: 100 parts of humic acid, 30-50 parts of hydroxyl carboxylate and 30-50 parts of caustic soda.
3. The water treatment agent of claim 2, wherein the salt of a hydroxycarboxylic acid is selected from at least one of sodium tartrate and sodium citrate.
4. The water treatment agent according to claim 2, wherein the active starch is starch obtained by hydrolysis and enzymolysis.
5. A method for preparing a water treatment agent according to any one of claims 1 to 4, comprising the steps of:
s1: preparing a reactive polymeric hydroxycarboxylic acid salt;
s2: according to the weight parts, 30-95 parts of active polymeric hydroxycarboxylic acid salt, 10-30 parts of sodium metaphosphate, 10-35 parts of sulfonated lignin and 1-5 parts of active starch are mixed to obtain the water treatment agent.
6. The method of preparing a water treatment agent according to claim 5, wherein preparing an active polymeric hydroxycarboxylic acid salt comprises:
s11: adding 100 parts by weight of humic acid and 30-50 parts by weight of hydroxycarboxylic acid salt into a reaction kettle, stirring and heating to 130-150 ℃, and reacting for 1-3 hours to obtain a mixture;
s12: cooling the mixture to 60 ℃, adding 30-50 parts of caustic soda into the mixture, and stirring for 1-3 hours to obtain a block;
s13: and cooling the block to normal temperature, and crushing to 40 meshes to obtain the active polymeric hydroxycarboxylic acid salt.
7. Use of a water treatment agent according to any one of claims 1 to 4 in the treatment of concentrated brine.
8. Use of a water treatment agent according to any one of claims 1 to 4 in the treatment of reclaimed water.
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| CN202210259403.2A CN114751530A (en) | 2022-03-15 | 2022-03-15 | Water treatment agent, preparation method and application thereof |
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