CN111377550A - Scale and corrosion inhibitor for ultra-high temperature heat supply network system - Google Patents
Scale and corrosion inhibitor for ultra-high temperature heat supply network system Download PDFInfo
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- CN111377550A CN111377550A CN202010328347.4A CN202010328347A CN111377550A CN 111377550 A CN111377550 A CN 111377550A CN 202010328347 A CN202010328347 A CN 202010328347A CN 111377550 A CN111377550 A CN 111377550A
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- scale
- corrosion inhibitor
- heat supply
- supply network
- network system
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
-
- 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
- C02F2303/08—Corrosion inhibition
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
An anti-scaling corrosion inhibitor for an ultra-high temperature heat supply network system can be used in a 140 ℃ heat supply network water system, and comprises the following components in percentage by weight: 5-30% of amine dendritic high polymer; 10-30% of phosphoric acid carboxylic acid butane; 3-20% of imidazoline cycloamine compound; 1-10% of a penetrating agent; the balance of deionized water and organic solvent; the proportion of each component is 100 percent; the scale and corrosion inhibitor mainly solves the problem of corrosion inhibition of carbon steel in a high-temperature heat supply network system with the water temperature close to 140 ℃, and can prevent scaling in the system so as to ensure normal operation of the system, safe production and stable heating.
Description
Technical Field
The invention belongs to the technical field of carbon steel corrosion inhibition and system scaling prevention of an ultrahigh-temperature heat supply network system, and particularly relates to a high-temperature scale and corrosion inhibitor which can be used in a 140 ℃ highest heat supply network water system.
Background
In recent years, in order to save energy and reduce pollution of medium and small boilers to atmosphere, more and more cities expand city heat supply networks for centralized heat supply, a thermal power plant far away from the urban area is selected for long-distance heat supply, and the water supply temperature of a primary network and a secondary network is close to 140 ℃. Under the condition of 140 ℃, the corrosion of carbon steel in water is aggravated, the scale and corrosion inhibitor is easy to pyrolyze, the effective content of a medicament is reduced, the scale and corrosion inhibition performance is poor, the corrosion of the carbon steel in a heat supply network system cannot be effectively inhibited, hard scale with high iron content is easy to form in a heat supply network heat exchanger, the heat exchange efficiency is reduced, the heat supply temperature of a heat supply network terminal user is reduced, and even the requirement of the lowest heat supply temperature cannot be met.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide the scale and corrosion inhibitor for the ultra-high temperature heat supply network system, which mainly solves the problem of corrosion inhibition of carbon steel in the high temperature heat supply network system with the water temperature close to 140 ℃, and can prevent scaling phenomenon in the system so as to ensure normal operation of the system, safe production and stable heating.
In order to achieve the purpose, the invention adopts the technical scheme that:
an anti-scaling corrosion inhibitor for an ultra-high temperature heat supply network system can be used in a 140 ℃ heat supply network water system, and comprises the following components in percentage by weight: 5-30% of amine dendritic high polymer; 10-30% of phosphoric acid carboxylic acid butane; 3-20% of imidazoline cycloamine compound; 1-10% of a penetrating agent; the balance of deionized water and organic solvent; the weight percentage of each component is 100 percent.
The amine dendritic high polymer is polyamide-amine dendritic polymer.
The phosphoric acid group carboxylic acid butane is one or more of 2-phosphoric acid group-1, 2, 4-tricarboxylic acid butane, 2-hydroxyphosphonoacetic acid and diethylenetriamine pentamethylene methylene phosphonic acid.
The imidazoline cyclic amine compound is imidazoline or 2, 5-pentylamine-benzimidazole.
The penetrating agent is one or more of dodecyl fatty alcohol polyoxyethylene ether, tetradecyl fatty alcohol polyoxyethylene ether and octadecyl fatty alcohol polyoxyethylene ether.
The organic solvent is one or more of ethanol, acetone, isopropanol and cyclohexanone.
In the scale and corrosion inhibitor for the heat supply network system, the phosphoric acid butane carboxylate is non-toxic, has good performance of inhibiting calcium carbonate, sulfate scale and calcium phosphate scale, has good high temperature resistance, oxidation resistance and chlorine resistance stability, and has good dispersion performance on high-turbidity and high-iron circulating water.
In the scale and corrosion inhibitor for the heat supply network system, the amine dendritic high polymer is a monodisperse macromolecule with regular, high branching degree and three-dimensional structure. Has good scale inhibition performance
In the scale and corrosion inhibitor for the heat supply network system, the imidazoline cycloamine compound has multiple functions of corrosion inhibition, sterilization, dispersion and the like and can be used as a metal corrosion inhibitor and a bactericide in an aqueous solution. The imidazoline ring of the corrosion inhibitor has strong coordination bond formed by the nitrogen atom of lone pair electron and metal atom, so that the energy state of the metal surface can be stabilized, and the corrosion inhibitor can be firmly adsorbed on the metal surface; and the nonpolar groups are arranged on the metal surface to form a hydrophobic film which can resist the movement of charges, so that the corrosion reaction is inhibited.
In the scale and corrosion inhibitor for the heat supply network system, the penetrating agent mainly plays a role in helping the scale and corrosion inhibitor to penetrate into the surface of equipment, and the penetrating agent is fatty alcohol polyoxyethylene ether nonionic surfactant. Can help the substance needing to be permeated penetrate into the substance needing to be permeated.
In the scale and corrosion inhibitor for the heat supply network system, the organic solvent mainly plays a role in dispersing the scale and corrosion inhibitor.
Compared with the prior art, the invention has the following beneficial effects:
1. the good corrosion resistance of the scale and corrosion inhibitor can be maintained under the condition that the water supply temperature of the primary net and the secondary net is at most close to 140 ℃.
2. Effectively prevents the scale formation phenomenon of the system while efficiently preventing the carbon steel corrosion. And normal and stable operation of the system is guaranteed.
3. The scale and corrosion inhibitor for the heat supply network mainly solves the problems of carbon steel corrosion and system scaling in water with the temperature close to 140 ℃. Meanwhile, the corrosion resistance and the scale resistance can be still maintained in water with high content of suspended matters and high iron content.
Detailed Description
The following examples will help illustrate the invention without limiting its scope.
Example 1:
15 percent of polyamide-amine dendritic polymer, 30 percent of 2-phosphate-1, 2, 4-tricarboxylic acid butane, 10 percent of imidazoline, 5 percent of penetrating agent and 20 percent of organic solvent; 20% deionized water. Wherein: the penetrating agent is dodecyl fatty alcohol-polyoxyethylene ether JFC, and the organic solvent is ethanol.
A certain amount of reverse osmosis device produced water is taken, 2mL of scale and corrosion inhibitor stock solution of the embodiment is added, the temperature is raised to 140 ℃, the circulating water flow rate is set to be 1000L/h, and a heat supply network dynamic simulation test is carried out under the condition of a closed high-temperature test. After 168 hours of operation, the carbon steel corrosion rate is 0.089mm/a, and the scale inhibition rate is 95.6%.
Example 2:
30% of a polyamidoamine dendrimer, 19% of a mixture of 2-phosphoric acid-1, 2, 4-butane tricarboxylate and diethylenetriamine pentamethylenephosphonic acid, 10% of 2, 5-pentylamine-benzimidazole, 6% of a penetrant, and 20% of an organic solvent; 15% deionized water. Wherein: the mixing ratio of the 2-phosphate-1, 2, 4-butane tricarboxylate to the diethylenetriamine pentamethylene methylene phosphonic acid is 6:4, the penetrating agent is octadecyl fatty alcohol polyoxyethylene ether, and the organic solvent is cyclohexanone.
Taking a certain amount of mixed water of the coagulated and clarified yellow river water and reverse osmosis produced water, adding 2mL of the scale and corrosion inhibitor stock solution, heating to 140 ℃, setting the circulating water flow rate to be 1000L/h, and performing a heat supply network dynamic simulation test under the closed high-temperature test condition. After 168 hours of operation, the carbon steel corrosion rate is 0.083mm/a, and the scale inhibition rate is 93.4 percent.
Example 3:
20% by weight of a polyamidoamine dendrimer, 25% by weight of a mixture of 2-phosphoric acid-butane-1, 2, 4-tricarboxylic acid and 2-hydroxyphosphonoacetic acid, 8% by weight of 2, 5-pentylamine-benzimidazole, 4% by weight of a penetrant, 23% by weight of an organic solvent; 20% deionized water. Wherein: the mixing ratio of the 2-phosphate-1, 2, 4-tricarboxylic acid butane to the 2-hydroxyphosphonoacetic acid is 7:3, the penetrating agent is tetradecyl fatty alcohol polyoxyethylene ether, and the organic solvent is isopropanol.
Taking a certain amount of coagulated and clarified yellow river water, adding 2mL of the scale and corrosion inhibitor stock solution of the embodiment, heating to 135 ℃, setting the circulating water flow rate to be 1000L/h, and performing a heat supply network dynamic simulation test under the closed high-temperature test condition. After 168 hours of operation, the carbon steel corrosion rate is 0.079mm/a, and the scale inhibition rate is 93.1%.
Claims (6)
1. The scale and corrosion inhibitor for the ultra-high temperature heat supply network system is characterized in that: the scale and corrosion inhibitor can be used in a 140 ℃ hot network water system and comprises the following components in percentage by weight: 5-30% of amine dendritic high polymer, 10-30% of phosphoric acid carboxylic butane, 3-20% of imidazoline cyclic amine compound, 1-10% of penetrating agent and the balance of deionized water and organic solvent; the weight percentage of each component is 100 percent.
2. The scale and corrosion inhibitor for the ultra-high temperature heat supply network system according to claim 1, which is characterized in that: the amine dendritic high polymer is polyamide-amine dendritic polymer.
3. The high-temperature scale and corrosion inhibitor according to claim 1, wherein: the phosphoric acid group carboxylic acid butane is one or more of 2-phosphoric acid group-1, 2, 4-tricarboxylic acid butane, 2-hydroxyphosphonoacetic acid and diethylenetriamine pentamethylene methylene phosphonic acid.
4. The scale and corrosion inhibitor for the ultra-high temperature heat supply network system according to claim 1, which is characterized in that: the imidazoline cyclic amine compound is imidazoline or 2, 5-pentylamine-benzimidazole.
5. The scale and corrosion inhibitor for the ultra-high temperature heat network system according to claim 1, wherein the penetrating agent is one or more of dodecyl fatty alcohol polyoxyethylene ether, tetradecyl fatty alcohol polyoxyethylene ether and octadecyl fatty alcohol polyoxyethylene ether.
6. The scale and corrosion inhibitor for the ultra-high temperature heat supply network system according to claim 1, which is characterized in that: the organic solvent is one or more of ethanol, acetone, isopropanol and cyclohexanone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010328347.4A CN111377550A (en) | 2020-04-23 | 2020-04-23 | Scale and corrosion inhibitor for ultra-high temperature heat supply network system |
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| CN202010328347.4A CN111377550A (en) | 2020-04-23 | 2020-04-23 | Scale and corrosion inhibitor for ultra-high temperature heat supply network system |
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| CN111377550A true CN111377550A (en) | 2020-07-07 |
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| CN202010328347.4A Pending CN111377550A (en) | 2020-04-23 | 2020-04-23 | Scale and corrosion inhibitor for ultra-high temperature heat supply network system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778510A (en) * | 2020-07-17 | 2020-10-16 | 宁夏华电供热有限公司 | Corrosion prevention process for adding corrosion inhibitor to ultra-high temperature heat supply system |
| CN112174343A (en) * | 2020-11-03 | 2021-01-05 | 西安热工研究院有限公司 | Green environment-friendly non-phosphorus scale and corrosion inhibitor and preparation method thereof |
| CN113135620A (en) * | 2021-04-30 | 2021-07-20 | 山东零点环保科技有限公司 | Composite scale inhibitor and preparation method thereof |
| CN113371851A (en) * | 2021-06-23 | 2021-09-10 | 华能山东石岛湾核电有限公司 | Scale and corrosion inhibitor for water used in high-temperature gas cooled reactor nuclear island plant and chemical adding method |
Citations (6)
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| CN1170700A (en) * | 1997-06-28 | 1998-01-21 | 李黔龙 | Applying method of high polymer containing carboxy and amide groups in treatment of buck |
| CN101962233A (en) * | 2010-09-27 | 2011-02-02 | 同济大学 | Dendritic polymer and sodium polyaspartate compound scale inhibitor for inhibiting silicon scale deposition in water |
| CN103242365A (en) * | 2013-04-27 | 2013-08-14 | 同济大学 | Preparation and application of dendritic polymer polyamide-amino octa-methylene phosphonic acid |
| CN107244753A (en) * | 2017-07-20 | 2017-10-13 | 国网吉林省电力有限公司电力科学研究院 | The special special efficacy environment-friendly type organic anti-scale corrosion inhibiter of heat supply network of steam power plant |
| CN109019884A (en) * | 2018-09-29 | 2018-12-18 | 河北卓能电力科技有限公司 | A kind of compound slow corrosion dirt dispersion agent and its application |
| CN109133389A (en) * | 2018-10-12 | 2019-01-04 | 山东理工大学 | Non-phosphorus composite scale inhibitor |
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2020
- 2020-04-23 CN CN202010328347.4A patent/CN111377550A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1170700A (en) * | 1997-06-28 | 1998-01-21 | 李黔龙 | Applying method of high polymer containing carboxy and amide groups in treatment of buck |
| CN101962233A (en) * | 2010-09-27 | 2011-02-02 | 同济大学 | Dendritic polymer and sodium polyaspartate compound scale inhibitor for inhibiting silicon scale deposition in water |
| CN103242365A (en) * | 2013-04-27 | 2013-08-14 | 同济大学 | Preparation and application of dendritic polymer polyamide-amino octa-methylene phosphonic acid |
| CN107244753A (en) * | 2017-07-20 | 2017-10-13 | 国网吉林省电力有限公司电力科学研究院 | The special special efficacy environment-friendly type organic anti-scale corrosion inhibiter of heat supply network of steam power plant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778510A (en) * | 2020-07-17 | 2020-10-16 | 宁夏华电供热有限公司 | Corrosion prevention process for adding corrosion inhibitor to ultra-high temperature heat supply system |
| CN112174343A (en) * | 2020-11-03 | 2021-01-05 | 西安热工研究院有限公司 | Green environment-friendly non-phosphorus scale and corrosion inhibitor and preparation method thereof |
| CN113135620A (en) * | 2021-04-30 | 2021-07-20 | 山东零点环保科技有限公司 | Composite scale inhibitor and preparation method thereof |
| CN113371851A (en) * | 2021-06-23 | 2021-09-10 | 华能山东石岛湾核电有限公司 | Scale and corrosion inhibitor for water used in high-temperature gas cooled reactor nuclear island plant and chemical adding method |
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Application publication date: 20200707 |