CN108359415A - Ethylene glycol type solar energy heat conducting medium - Google Patents
Ethylene glycol type solar energy heat conducting medium Download PDFInfo
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- CN108359415A CN108359415A CN201810420617.7A CN201810420617A CN108359415A CN 108359415 A CN108359415 A CN 108359415A CN 201810420617 A CN201810420617 A CN 201810420617A CN 108359415 A CN108359415 A CN 108359415A
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Abstract
A kind of ethylene glycol type solar energy heat conducting medium, it is stirred and is made by ethylene glycol, deionized water, triethanolamine, ethylenediamine tetramethylene phosphonic acid, diethylene triamine pentamethylene phosphonic, benzotriazole, polymethylacrylic acid, 6000 polymaleic anhydride of degree of polymerization heat stepwise under starvation environment.The ethylene glycol solar energy heat conducting medium corrosion and scale inhibition performance of preparation is excellent, and reserve alkalinity is more than the long-term effect that 20ml ensure that heat-conducting medium；Thermal coefficient is high, and thermal stability is good, and steady operation under panel solar special operation condition may be implemented in 20-150 DEG C of temperature ranges.With stable performance under high temperature, use environment is wide in range, and the feature that corrosion and scale inhibition performance is long-acting and environmental-friendly and thermal coefficient is good, raw material sources are direct and cheap and easy to get, low to equipment service requirement, it is easy to accomplish large-scale industrial production.
Description
The application is the applying date to be September in 2015 23, and application No. is 2015106112490, entitled ethylene glycol type is too
The divisional application of the Chinese invention patent application of positive energy heat-conducting medium and preparation method thereof.
Technical field
The present invention relates to field of inorganic materials, and in particular to a kind of glycol water heat-conducting medium and preparation method thereof.
Background technology
In recent years, the solar thermal collector market in China was fast-developing.Wherein, due to flat-plate solar collector
Have safety and reliability, longer life expectancy, with building is more preferable combines and the characteristics such as more comfortable will be as following development trend.So
And there are many technologies to need to be further increased and perfect in panel solar technology evolution.Panel solar heat conduction
Medium is to determine panel solar overall performance the key link.Currently, domestic market is rarely directed to the special heat conduction of solar energy
The research and development and production of medium, and the focus of panel solar manufacturer buying is mostly the freezing point of heat-conducting medium, and in height
Influence of the boiling point and its corrosion and scale inhibition performance of the lower heat-conducting medium of temperature for panel solar system does not relate to.Existing solar energy
The boiling point overwhelming majority of heat-conducting medium is at 110 DEG C or less, on the one hand, when the hot water of solar energy output within a certain period of time cannot be by
When timely using, since the accumulation of energy can make thermal-arrest plate temperature be higher by itself boiling point of heat-conducting medium, so that heat conduction can be caused
Boils so that pressure, which constantly increases, in the circulatory system causes the circulatory system to leak；On the other hand, when heat-conducting medium boils
Afterwards, corrosion inhibiting and descaling agent therein will appear the precipitation under fluidized state or precipitation, and corrosion and scale inhibition performance is caused to fail.There are needle in foreign countries
Finished product low to freezing point and that boiling point is high, but since it is expensive, used not yet in importer.
Ethylene glycol has freezing point low（-12.9℃）, boiling point it is high（197.3℃）, physical property and chemical property stablize, viscosity
Small flow is good, is widely used as the basal liquid of heat-conducting medium in field of heat exchange at present, is added after being mixed with water inorganic and organic
Corrosion inhibiting and descaling agent is compounded into heat-conducting medium.Freezing point can be in first to drop with the increase of amount of water after ethylene glycol is mixed as basic liquid with water
Raised trend after low, and boiling point can be reduced rapidly gradually, after amount of water to 40%, boiling point maintains essentially in 110 DEG C one
Under, limit the use scope at slightly higher temperature of glycol water heat-conducting medium.It is situated between using pure ethylene glycol as heat conduction
Matter can improve boiling point, but it is smaller for the solubility of inorganic corrosion inhibiting and descaling agent, cannot reach good anticorrosion-antiscaling effect,
Moreover, the corrosion inhibiting and descaling agent being made of completely organic matter at present also almost without.
Based on above 2 points, develops performance under a kind of high temperature and stablize, use environment is wide in range, for existing solar energy system
The corrosion and scale inhibition performance of material is long-acting, and good high temperature heat-conducting medium of heat conductivility and preparation method thereof, will be to solar energy
It efficiently utilizes, medium temperature heat conduction plays huge impetus using field.
Invention content
The purpose of the present invention is invention one kind, and performance is stablized at-20-150 DEG C, and use environment is wide in range, corrosion-and-scale-inhibiting property
The long-acting ethylene glycol type solar energy heat conducting medium and preparation method thereof of energy.
A kind of preparation method of ethylene glycol type solar energy heat conducting medium, it includes the following steps：
（1）Ethylene glycol and deionized water are mixed into glycol water.
（2）It is stirred using tetrafluoroethene electric mixer, triethanolamine is dissolved in glycol water, it is therefore an objective to obtain alkali
Property glycol water, while ensureing the enough reserve alkalinities of finished product.
（3）By step（2）Obtained glycol water and ethylenediamine tetramethylene phosphonic acid, five methene of diethylenetriamine
Phosphonic acids, methyl benzotriazazole, polymethylacrylic acid, 6000 polymaleic anhydride of the degree of polymerization, electric heating cover, tetrafluoro electric mixer
It is transferred to vacuum glove box, nitrogen replacement operator to air is then carried out and is emptied completely.
（4）It adjusts electric heating cover temperature to 60-80 DEG C of temperature control, ethylene glycol solution is placed in electric heating cover and is heated, add successively
Enter ethylenediamine tetramethylene phosphonic acid, diethylene triamine pentamethylene phosphonic, methyl benzotriazazole, polyacrylic acid, heating stirring is extremely
Water white transparency.
（5）Electric heating cover temperature is adjusted to 100-120 DEG C of temperature control, slowly shakes off 6000 polymaleic anhydride of the degree of polymerization is added,
Continuous heating, which stirs to 6000 polymaleic anhydride of the degree of polymerization of powdery all to dissolve, obtains ethylene glycol type solar energy heat conducting medium, second
The pH value of diol type solar energy heat conducting medium is 8.5-10, reserve alkalinity 20-25ml.
The present invention also provides a kind of ethylene glycol type solar energy heat conducting media, it is by following group grouping in parts by mass
At：83.08-89.94 parts of ethylene glycol, 1-5 parts of deionized water, 7-9 parts of triethanolamine, ethylenediamine tetramethylene phosphonic acid 0.05-
0.25 part, 0.02-0.1 parts of diethylene triamine pentamethylene phosphonic, 0.8-1 parts of benzotriazole, polymethylacrylic acid 0.05-0.07
Part, 0.9-1.3 parts of 6000 polymaleic anhydride of the degree of polymerization.
Ethylene glycol type solar energy heat conducting medium is grouped as by following group in parts by mass：84.56 parts of ethylene glycol, go from
4 parts of sub- water, 8.5 parts of triethanolamine, 0.2 part of ethylenediamine tetramethylene phosphonic acid, 0.04 part of diethylene triamine pentamethylene phosphonic, benzo
0.85 part of triazole, 0.65 part of polymethylacrylic acid, 1.2 parts of 6000 polymaleic anhydride of the degree of polymerization.
Required instrument and equipment includes tetrafluoro electric mixer（Jintan Jie Ruier Electrical Appliances Co., Ltd）, vacuum glove box（It is long
Sha Tian creates powder technology Co., Ltd）, electric heating cover.
The ethylene glycol is terylene grade ethylene glycol.
It is since its own thermal stability is good not that the advantageous effect of this programme, which is selection ethylene glycol as heat-conducting medium base fluid,
Easily acidification, the good characteristic of viscosity small flow；According to ethylene glycol characteristic, it is to can guarantee medium to select and a small amount of deionized water is added
Certain freezing point is also ensured under the premise of high boiling；The purpose of selecting small molecule organic amine is that heat-conducting medium is enable to obtain enough
Reserve alkalinity；It is that additive solubility matter is avoided to occur with the triethanolamine association procedure of part to select operation in vacuum glove box
It aoxidizes and generates by-product；Selecting ethylenediamine tetramethylene phosphonic acid is had for heat-conducting system medium carbon steel, cast iron, scolding tin material
Excellent corrosion mitigating effect；It is to be directed to heat-conducting system with ethylenediamine tetramethylene phosphonic acid compounding to select diethylene triamine pentamethylene phosphonic
Middle metallic steel, cast iron, scolding tin material have more excellent corrosion mitigating effect；It is to metal red copper, Huang to select benzotriazole compounding
Copper has special corrosion mitigating effect；Select polymethylacrylic acid to be compounding benzotriazole has excellent corrosion mitigating effect for cast aluminium；Choosing
It is to have excellent scale inhibition effect for inside the circulatory system under hot environment with 6000 polymaleic anhydride of the degree of polymerization.
Specific implementation mode
Embodiment one：
A kind of ethylene glycol solar energy heat conducting medium, it is grouped as by following group in parts by mass：89.94 parts of ethylene glycol, goes
1 part of ionized water, 7 parts of triethanolamine, 0.05 part of ethylenediamine tetramethylene phosphonic acid, 0.06 part of diethylene triamine pentamethylene phosphonic, benzene
And 1 part of triazole, 0.05 part of polymethylacrylic acid, 0.9 part of 6000 polymaleic anhydride of the degree of polymerization.Its preparation method is：Using
Tetrafluoroethene electric mixer stirs, and ethylene glycol and deionized water are mixed into glycol water, triethanolamine is dissolved in second
Two alcohol solutions；By obtained ethylene glycol solution and ethylenediamine tetramethylene phosphonic acid, diethylene triamine pentamethylene phosphonic, benzo
Triazole, polymethylacrylic acid, 6000 polymaleic anhydride of the degree of polymerization, electric heating cover, tetrafluoro electric mixer are transferred to vacuum glove
Then case carries out nitrogen replacement operator to air and is emptied completely；Adjust electric heating cover temperature to 60-80 DEG C of temperature control, ethylene glycol is molten
Liquid is placed in electric heating cover and heats, and sequentially adds ethylenediamine tetramethylene phosphonic acid, diethylene triamine pentamethylene phosphonic, three nitrogen of benzo
Azoles, polymethylacrylic acid, heating stirring become colorless to solution is faint yellow；Then electric heating cover temperature is adjusted to 100-120 DEG C
Temperature control slowly is shaken off 6000 polymaleic anhydride of the degree of polymerization is added, and continuous heating is stirred to 6000 poly of the degree of polymerization of powdery
All dissolving obtains ethylene glycol solar energy heat conducting medium to acid anhydride.Obtain ethylene glycol solar energy heat conducting medium.
Required instrument and equipment includes tetrafluoro electric mixer（Jintan Jie Ruier Electrical Appliances Co., Ltd）, vacuum glove box（It is long
Sha Tian creates powder technology Co., Ltd）, electric heating cover.It is 50-80r/min. that the tetrafluoro electric mixer, which stirs speed,
Test result shows,
（1）Corrosion and scale inhibition performance：With reference to（GB29743-2013 glassware test methods）, under 140 DEG C of environment, continue 336h
After test：Carbon steel increases 6mg, brass reduces 6.5mg, red copper reduces 5mg, cast iron increases 7mg, scolding tin increases 19mg, cast aluminium subtracts
Few 22mg；There is a little floccule to occur after the completion of test in heat-conducting medium, scale inhibition effect is good.；Heat-conducting medium after the completion of test
Inside there is a little floccule to occur.
（2）Thermal coefficient：Use 100 DEG C of test results of thermal conductivity factor instrument for 0.48W/ (mK).
（3）PH value：Stoste pH value is 8.0, test（1）Heat-conducting medium pH value is 7.2 after the completion, and variation is apparent.
（4）Freezing point：-18℃；Boiling point：149℃.
Embodiment two：
The present embodiment place same as Example 1 repeats no more, the difference is that：A kind of ethylene glycol type solar energy heat conducting Jie
Matter, it is grouped as by following group in parts by mass：87.77 parts of ethylene glycol, 2 parts of deionized water, 7.5 parts of triethanolamine, second
0.1 part of diamines tetramethylene phosphonic acid, 0.08 part of diethylene triamine pentamethylene phosphonic, 0.08 part of benzotriazole, polymethyl
0.05 part of acid, 1 part of 6000 polymaleic anhydride of the degree of polymerization.
Test result shows,
（1）Corrosion and scale inhibition performance：With reference to（GB29743-2013 glassware test methods）, under 140 DEG C of environment, continue 336h
Test carbon steel increases 5mg afterwards, brass reduces 4.5mg, red copper reduces 4mg, cast iron increases 18mg, scolding tin increases 15mg, cast aluminium subtracts
Few 20mg；It is generated without precipitation, floccule in heat-conducting medium after the completion of test.
（2）Thermal coefficient：Use 100 DEG C of test results of thermal conductivity factor instrument for 0.49W/ (mK).
（3）PH value：Stoste pH value is 8, test（1）Heat-conducting medium pH value is 7.4 after the completion, and it is little to reduce amplitude.
（4）Freezing point：-18℃；Boiling point：149℃.
Embodiment three：
The present embodiment place same as Example 1 repeats no more, the difference is that：A kind of ethylene glycol type solar energy heat conducting Jie
Matter, it is grouped as by following group in parts by mass：85.15 parts of ethylene glycol, 3 parts of deionized water, 8 parts of triethanolamine, second two
0.15 part of amine tetramethylene phosphonic acid, 1 part of diethylene triamine pentamethylene phosphonic, 0.9 part of benzotriazole, polymethylacrylic acid 0.7
Part, 1.1 parts of 6000 polymaleic anhydride of the degree of polymerization.
Test result shows,
（1）Corrosion and scale inhibition performance：With reference to（GB29743-2013 glassware test methods）, under 140 DEG C of environment, continue 336h
Test carbon steel increases 3mg afterwards, brass reduces 3.6mg, red copper reduces 3.5mg, cast iron increases 4mg, scolding tin increases 9mg, cast aluminium subtracts
Few 13mg；Heat-conducting medium does not have floccule appearance, scale inhibition effect good after the completion of test.
（2）Thermal coefficient：Use 100 DEG C of test results of thermal conductivity factor instrument for 0.59W/ (mK).
（3）PH value：Stoste pH value is 8.2, test（1）Heat-conducting medium pH value is 7.7 after the completion, and it is little to reduce amplitude.
（4）Freezing point：-20℃；Boiling point：149.5℃.
Example IV：
The present embodiment place same as Example 1 repeats no more, the difference is that：A kind of ethylene glycol type solar energy heat conducting Jie
Matter, it is grouped as by following group in parts by mass：84.56 parts of ethylene glycol, 4 parts of deionized water, 8.5 parts of triethanolamine, second
0.2 part of diamines tetramethylene phosphonic acid, 0.04 part of diethylene triamine pentamethylene phosphonic, 0.85 part of benzotriazole, polymethyl
0.65 part of acid, 1.2 parts of 6000 polymaleic anhydride of the degree of polymerization.
Test result shows,
（1）Corrosion and scale inhibition performance：With reference to（GB29743-2013 glassware test methods）, under 140 DEG C of environment, continue 336h
After test
Carbon steel increases 0.5mg, brass reduces 0.5mg, red copper reduces 0.5mg, cast iron increases 1mg, scolding tin increases 1mg, cast aluminium subtracts
Few 1.6mg；There is a little floccule to occur after the completion of test in heat-conducting medium, scale inhibition effect is good；Heat-conducting medium after the completion of test
It is interior to be generated without precipitation, floccule.
（2）Thermal coefficient：Use 100 DEG C of test results of thermal conductivity factor instrument for 0.62W/ (mK).
（3）PH value：Stoste pH value is 8.6, test（1）Heat-conducting medium pH value is 8.4 after the completion, and it is little to reduce amplitude.
（4）Freezing point：-20℃；Boiling point：150℃.
The present embodiment resultant effect is best.
Embodiment five：
The present embodiment place same as Example 1 repeats no more, the difference is that：A kind of ethylene glycol type solar energy heat conducting Jie
Matter, it is grouped as by following group in parts by mass：83.08 parts of ethylene glycol, 5 parts of deionized water, 9 parts of triethanolamine, second two
0.25 part of amine tetramethylene phosphonic acid, 0.02 part of diethylene triamine pentamethylene phosphonic, 0.8 part of benzotriazole, polymethylacrylic acid
0.55 part, 1.3 parts of 6000 polymaleic anhydride of the degree of polymerization.
Test result shows,
（1）Corrosion and scale inhibition performance：With reference to（GB29743-2013 glassware test methods）, under 140 DEG C of environment, continue 336h
After test
Carbon steel increases 3.5mg, brass reduces 5mg, red copper reduces 5.5mg, cast iron increases 7mg, scolding tin increases 5mg, cast aluminium is reduced
5.5mg；It is generated without precipitation, floccule in heat-conducting medium after the completion of test.
（2）Thermal coefficient：Use 100 DEG C of test results of thermal conductivity factor instrument for 0.59W/ (mK)
（3）PH value：Stoste pH value is 9, test（1）Heat-conducting medium pH value is 8.7 after the completion, and it is little to reduce amplitude.
（4）Freezing point：-16℃；Boiling point：168℃.
Claims (2)
1. a kind of ethylene glycol type solar energy heat conducting medium, it is characterized in that it is grouped as by following group in parts by mass：Second two
84.56 parts of alcohol, 4 parts of deionized water, 8.5 parts of triethanolamine, 0.2 part of ethylenediamine tetramethylene phosphonic acid, five methene of diethylenetriamine
0.04 part of phosphonic acids, 0.85 part of benzotriazole, 0.65 part of polymethylacrylic acid, 1.2 parts of 6000 polymaleic anhydride of the degree of polymerization.
2. ethylene glycol type solar energy heat conducting medium according to claim 1, it is characterized in that the ethylene glycol is terylene grade second
Glycol.
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| CN112852385A (en) * | 2021-03-20 | 2021-05-28 | 天津锦源远华石油工程技术有限公司 | Novel composite chemical heat-conducting medium |
| 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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| CN110591657B (en) * | 2019-09-18 | 2021-09-21 | 深圳市耐斯实业有限公司 | Heat super-heat medium liquid |
| CN112852385A (en) * | 2021-03-20 | 2021-05-28 | 天津锦源远华石油工程技术有限公司 | Novel composite chemical heat-conducting medium |
| 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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| Publication number | Publication date |
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| CN105062431A (en) | 2015-11-18 |
| CN105062431B (en) | 2018-10-09 |
| CN108359415B (en) | 2020-07-10 |
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