CN113201315A - Preparation method and application of ethylene glycol type heat-conducting working medium in alpine and high-altitude areas - Google Patents
Preparation method and application of ethylene glycol type heat-conducting working medium in alpine and high-altitude areas Download PDFInfo
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- CN113201315A CN113201315A CN202110440311.XA CN202110440311A CN113201315A CN 113201315 A CN113201315 A CN 113201315A CN 202110440311 A CN202110440311 A CN 202110440311A CN 113201315 A CN113201315 A CN 113201315A
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- ethylene glycol
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/10—Liquid materials
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F15/00—Other methods of preventing corrosion or incrustation
- C23F15/005—Inhibiting incrustation
Abstract
The invention discloses a preparation method and application of an ethylene glycol type heat-conducting working medium in alpine and high-altitude areas, and relates to the technical field of heat-conducting working media. The invention relates to a preparation method of an ethylene glycol type heat-conducting working medium in alpine and high-altitude areas, which comprises the following steps of: the raw material components comprise, by weight, 0.63 part of disodium hydrogen phosphate, 0.25 part of sodium benzoate, 0.12 part of benzotriazole, 0.15 part of methyl benzotriazole, 0.035 part of sodium hydroxide, 44.815 parts of water and 51 parts of ethylene glycol; adjusting the pH: and D, adding sodium hydroxide into the filtrate obtained in the fourth step, heating and stirring, and adjusting the pH value to 7-8 to obtain the glycol type heat-conducting working medium. The invention discloses a preparation method and application of an ethylene glycol type heat-conducting working medium in alpine and high-altitude areas, which are stable in liquid and difficult to evaporate, so that the heat-conducting working medium can be widely applied to the alpine and high-altitude areas; the heat conducting working medium is neutral, so that the corrosion to a hot water engineering system in a high-altitude alpine region or the heating in high-altitude alpine construction is avoided, and the corrosion and scale inhibition effects are achieved.
Description
Technical Field
The invention relates to the technical field of heat-conducting working media, in particular to a preparation method and application of an ethylene glycol type heat-conducting working medium in alpine and high-altitude areas.
Background
The heat conducting agent is used as a heat conducting substance to play a role in heat enhancement and conduction, and the glycol has the advantages of low freezing point (-12.9 ℃), high boiling point (197.3 ℃), stable physical properties and chemical properties, small viscosity and good fluidity, and is widely used as a base liquid of a heat conducting medium in the field of heat exchange at present.
The existing method for preparing the base solution by using the glycol has the following defects: 1. after being mixed with water, the glycol serving as a base liquid has poor stability of freezing point and boiling point, so that the application range of a glycol aqueous solution heat-conducting medium is limited; 2. the prior heat-conducting agent taking ethylene glycol as base liquid can not achieve good corrosion and scale inhibition effects, and is very easy to generate scaling phenomenon due to heating.
Disclosure of Invention
The invention mainly aims to provide a preparation method and application of an ethylene glycol type heat-conducting working medium in alpine and high-altitude areas, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
a preparation method of ethylene glycol type heat-conducting working medium in alpine and high-altitude areas comprises the following steps:
step one, weighing raw materials: the raw material components comprise, by weight, 0.63 part of disodium hydrogen phosphate, 0.25 part of sodium benzoate, 0.12 part of benzotriazole, 0.15 part of methyl benzotriazole, 0.035 part of sodium hydroxide, 44.815 parts of water and 51 parts of ethylene glycol;
step two, preparing the ethylene glycol aqueous solution: mixing and stirring ethylene glycol and water to form an ethylene glycol aqueous solution;
step three, preparing a mixed solution A: placing the ethylene glycol aqueous solution formed in the step two into a heating sleeve, sequentially adding benzotriazole, sodium benzoate and methylbenzotriazole into the heating sleeve, and then heating and stirring to obtain a mixed solution A;
step four, filtering the mixed solution A: pouring the mixed solution A in the third step into a filter screen for filtering operation to obtain a filtrate;
step five, pH adjustment: and D, adding sodium hydroxide into the filtrate obtained in the fourth step, heating and stirring, and adjusting the pH value to 7-8 to obtain the glycol type heat-conducting working medium.
Preferably, the ethylene glycol and water are mixed and stirred by a tetrafluoroethylene electric stirrer in the second step, and the rotating speed of the tetrafluoroethylene electric stirrer is 50-80 r/min.
Preferably, in the third step, the heating temperature of the heating jacket is adjusted to 50-80 ℃, the heating time of the heating jacket is 30-60 min, and the nitrogen replacement operation is carried out before the heating of the inside of the heating jacket until the air is completely emptied.
Preferably, the filter screen in the fourth step has a size of 150-200 meshes, and the number of filter screen layers is 1-3.
Preferably, the glycol in the second step is polyester grade glycol.
Preferably, the water in the second step is deionized water.
Preferably, the heating temperature in the fifth step is 35 ℃.
The application of the ethylene glycol type heat-conducting working medium in the alpine and high-altitude areas is characterized in that the ethylene glycol type heat-conducting working medium is applied to one or more of an electric boiler, an electromagnetic heater, an air-conditioning heat supply system, a high-altitude and high-cold area hot water engineering system and high-altitude and high-cold construction heat supply.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a preparation method of an ethylene glycol type heat-conducting working medium in alpine and high-altitude areas, and the obtained heat-conducting working medium comprises the following components in parts by weight: 0.63 part of disodium hydrogen phosphate, 0.25 part of sodium benzoate, 0.12 part of benzotriazole, 0.15 part of methyl benzotriazole, 0.035 part of sodium hydroxide, 44.815 parts of water and 51 parts of ethylene glycol; the heat-conducting working medium agent selects water as deionized water, can ensure a certain freezing point on the premise of ensuring high boiling point of the medium, is stable in liquid and not easy to evaporate, ensures the application range of the glycol aqueous solution heat-conducting medium, and can be widely applied to alpine and high-altitude areas.
2. According to the invention, the PH value of the filtrate is adjusted by using sodium hydroxide to obtain the glycol type heat-conducting working medium with the PH value of 7-8, the heat-conducting working medium is neutral, does not corrode a hot water engineering system in a high-altitude alpine region or a high-altitude alpine tunnel construction heating system in the application process, and has excellent heat-conducting property and high-temperature resistance, and corrosion and scale inhibition effects.
Drawings
Fig. 1 is a preparation flow chart of a preparation method and application of the ethylene glycol type heat-conducting working medium in the alpine and high-altitude areas.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
A preparation method of ethylene glycol type heat-conducting working medium in alpine and high-altitude areas comprises the following steps:
the method comprises the following steps of firstly, taking raw materials comprising, by weight, 0.63 part of disodium hydrogen phosphate, 0.25 part of sodium benzoate, 0.12 part of benzotriazole, 0.15 part of tolyltriazole, 0.035 part of sodium hydroxide, 44.815 parts of water and 51 parts of ethylene glycol;
mixing ethylene glycol and water, and stirring by adopting a tetrafluoroethylene electric stirrer at the rotating speed of 50r/min to form an ethylene glycol aqueous solution, wherein the ethylene glycol is polyester-grade ethylene glycol, and the water is deionized water;
step three, adjusting the heating temperature of the heating sleeve to 50 ℃, wherein the heating time of the heating sleeve is 60min, performing nitrogen replacement operation before heating the interior of the heating sleeve until the air is completely emptied, then placing the formed glycol aqueous solution into the heating sleeve, sequentially adding benzotriazole, sodium benzoate and methylbenzotriazole into the heating sleeve, and then heating and stirring to obtain a mixed solution A;
pouring the mixed solution A into a filter screen with 150 meshes and three layers for filtering operation to obtain a filtrate;
and step five, adding sodium hydroxide into the filtrate obtained in the step four, heating and stirring, adjusting the temperature to 35 ℃, and adjusting the pH value to 7-8 to obtain the ethylene glycol type heat-conducting working medium.
Example two
A preparation method of ethylene glycol type heat-conducting working medium in alpine and high-altitude areas comprises the following steps:
the method comprises the following steps of firstly, taking raw materials comprising, by weight, 0.63 part of disodium hydrogen phosphate, 0.25 part of sodium benzoate, 0.12 part of benzotriazole, 0.15 part of tolyltriazole, 0.035 part of sodium hydroxide, 44.815 parts of water and 51 parts of ethylene glycol;
mixing ethylene glycol and water, and stirring by adopting a tetrafluoroethylene electric stirrer at the rotating speed of 65r/min to form an ethylene glycol aqueous solution, wherein the ethylene glycol is polyester-grade ethylene glycol, and the water is deionized water;
step three, adjusting the heating temperature of the heating sleeve to 65 ℃, keeping the heating time of the heating sleeve at 45min, carrying out nitrogen replacement operation in the heating sleeve before heating until air is completely exhausted, then placing the formed glycol aqueous solution in the heating sleeve, sequentially adding benzotriazole, sodium benzoate and methylbenzotriazole into the heating sleeve, and then heating and stirring to obtain a mixed solution A;
pouring the mixed solution A into a filter screen with 175 meshes and two layers for filtering operation to obtain a filtrate;
and step five, adding sodium hydroxide into the filtrate obtained in the step four, heating and stirring, adjusting the temperature to 35 ℃, and adjusting the pH value to 7-8 to obtain the ethylene glycol type heat-conducting working medium.
EXAMPLE III
A preparation method of ethylene glycol type heat-conducting working medium in alpine and high-altitude areas comprises the following steps:
the method comprises the following steps of firstly, taking raw materials comprising, by weight, 0.63 part of disodium hydrogen phosphate, 0.25 part of sodium benzoate, 0.12 part of benzotriazole, 0.15 part of tolyltriazole, 0.035 part of sodium hydroxide, 44.815 parts of water and 51 parts of ethylene glycol;
mixing ethylene glycol and water, and stirring by adopting a tetrafluoroethylene electric stirrer, wherein the rotating speed of the tetrafluoroethylene electric stirrer is 80r/min, so as to form an ethylene glycol aqueous solution, wherein the ethylene glycol is terylene grade ethylene glycol, and the water is deionized water;
step three, adjusting the heating temperature of the heating sleeve to 80 ℃, keeping the heating time of the heating sleeve at 30min, performing nitrogen replacement operation in the heating sleeve before heating until air is completely exhausted, then placing the formed glycol aqueous solution in the heating sleeve, sequentially adding benzotriazole, sodium benzoate and methylbenzotriazole into the heating sleeve, and then heating and stirring to obtain a mixed solution A;
pouring the mixed solution A into a filter screen with 200 meshes and 1 layer to carry out filtering operation to obtain a filtrate;
and step five, adding sodium hydroxide into the filtrate obtained in the step four, heating and stirring, adjusting the temperature to 35 ℃, and adjusting the pH value to 7-8 to obtain the ethylene glycol type heat-conducting working medium.
Example four
The embodiment provides the application of the low-temperature-resistant heat conducting agent, and the low-temperature-resistant heat conducting agent is applied to one or more of an electric boiler, an electromagnetic heater, an air-conditioning heating system, a hot water engineering system in a high-altitude alpine region and high-altitude alpine construction heating; compared with the prior art, the ethylene glycol type heat-conducting working medium has the pH value of 7-8, is neutral, does not corrode in the application process when being used for heating in hot water engineering or high-altitude high-cold construction in high-altitude high-cold areas, and has excellent heat-conducting property and high-temperature resistance.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A preparation method of ethylene glycol type heat-conducting working medium in alpine and high-altitude areas is characterized by comprising the following steps: the method comprises the following steps:
step one, weighing raw materials: the raw material components comprise, by weight, 0.63 part of disodium hydrogen phosphate, 0.25 part of sodium benzoate, 0.12 part of benzotriazole, 0.15 part of methyl benzotriazole, 0.035 part of sodium hydroxide, 44.815 parts of water and 51 parts of ethylene glycol;
step two, preparing the ethylene glycol aqueous solution: mixing and stirring ethylene glycol and water to form an ethylene glycol aqueous solution;
step three, preparing a mixed solution A: placing the ethylene glycol aqueous solution formed in the step two into a heating sleeve, sequentially adding benzotriazole, sodium benzoate and methylbenzotriazole into the heating sleeve, and then heating and stirring to obtain a mixed solution A;
step four, filtering the mixed solution A: pouring the mixed solution A in the third step into a filter screen for filtering operation to obtain a filtrate;
step five, pH adjustment: and D, adding sodium hydroxide into the filtrate obtained in the fourth step, heating and stirring, and adjusting the pH value to 7-8 to obtain the glycol type heat-conducting working medium.
2. The preparation method of the ethylene glycol type heat-conducting working medium in the alpine and high-altitude areas according to claim 1, characterized in that: and in the second step, the ethylene glycol and the water are mixed and stirred by a tetrafluoroethylene electric stirrer, and the rotating speed of the tetrafluoroethylene electric stirrer is 50-80 r/min.
3. The preparation method of the ethylene glycol type heat-conducting working medium in the alpine and high-altitude areas according to claim 1, characterized in that: and in the third step, the heating temperature of the heating sleeve is adjusted to 50-80 ℃, the heating time of the heating sleeve is 30-60 min, and the interior of the heating sleeve is subjected to nitrogen replacement operation before heating until the air is completely exhausted.
4. The preparation method of the ethylene glycol type heat-conducting working medium in the alpine and high-altitude areas according to claim 1, characterized in that: in the fourth step, the specification of the filter screen is 150-200 meshes, and the number of the filter screen layers is 1-3.
5. The preparation method of the ethylene glycol type heat-conducting working medium in the alpine and high-altitude areas according to claim 1, characterized in that: and in the second step, the glycol is terylene grade glycol.
6. The preparation method of the ethylene glycol type heat-conducting working medium in the alpine and high-altitude areas according to claim 1, characterized in that: and in the second step, the water is deionized water.
7. The preparation method of the ethylene glycol type heat-conducting working medium in the alpine and high-altitude areas according to claim 1, characterized in that: the heating temperature in the fifth step is 35 ℃.
8. The application of the ethylene glycol type heat-conducting working medium in the alpine and high-altitude areas according to the claims 1-7 is characterized in that: the ethylene glycol type heat-conducting working medium is applied to one or more of an electric boiler, an electromagnetic heater, an air-conditioning heating system, a hot water engineering system in a high-altitude alpine region and high-altitude alpine construction heating.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113717700A (en) * | 2021-09-02 | 2021-11-30 | 深圳市凯盈节能科技有限公司 | Heat-conducting medium for hot water circulation and preparation method thereof |
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| CN103497740A (en) * | 2013-09-10 | 2014-01-08 | 大庆市北华化工厂 | Antifreeze fluid by taking composite corrosion inhibitor as main raw material |
| CN107384336A (en) * | 2017-08-04 | 2017-11-24 | 江苏云瀚股份有限公司 | A kind of automobile using long-acting liquid coolant and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6802988B1 (en) * | 1999-10-29 | 2004-10-12 | Basf Aktiengesellschaft | Antifreeze concentrates based on dicarboxylic acids, molybdate and triazoles or thiazoles, and coolant compositions comprising them |
| CN103497740A (en) * | 2013-09-10 | 2014-01-08 | 大庆市北华化工厂 | Antifreeze fluid by taking composite corrosion inhibitor as main raw material |
| CN107384336A (en) * | 2017-08-04 | 2017-11-24 | 江苏云瀚股份有限公司 | A kind of automobile using long-acting liquid coolant and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113717700A (en) * | 2021-09-02 | 2021-11-30 | 深圳市凯盈节能科技有限公司 | Heat-conducting medium for hot water circulation and preparation method thereof |
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