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Anti-freezing fluid for solar water heater and preparation method thereof

A solar water heater and antifreeze technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of decreased corrosion inhibition performance, easy to block pipes, etc., to prevent metal pitting, low price, and good corrosion inhibition effect. Effect

Active Publication Date: 2014-04-30
RICHU DONGFANG SOLAR ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only reduces the corrosion inhibition performance, but also easily blocks the pipeline

Method used

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  • Anti-freezing fluid for solar water heater and preparation method thereof
  • Anti-freezing fluid for solar water heater and preparation method thereof
  • Anti-freezing fluid for solar water heater and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation method of the above-mentioned antifreeze solution for solar water heaters: first add deionized water to liquid ethylene glycol to prepare an ethylene glycol solution, then add benzotriazole and mercaptobenzothiazole to the ethylene glycol solution in sequence , sodium benzoate, sodium gluconate, cinnamic acid, borax, sodium phosphate, sodium nitrate, sodium hydroxide, defoamer and dye eleven kinds of materials, to obtain a transparent and clear antifreeze.

[0025] In the above preparation method, when adding materials to the ethylene glycol solution, after each material is added, the mixed solution is stirred evenly, and the next material is added after the mixed solution is clarified. This helps to increase the dissolution rate of the material.

[0026] The antifreeze of the above components is used in solar water heaters. The operating temperature range of solar water heaters varies greatly. The maximum operating temperature inside the device can rea...

Embodiment 1

[0032] Example 1: A kind of antifreeze suitable for areas with the lowest temperature of -10°C

[0033] A kind of antifreeze used for solar water heaters, 100kg in total, is composed of the following components by mass percentage:

[0034]

[0035] The preparation method of the antifreeze of embodiment 1 is made into ethylene glycol solution with liquid ethylene glycol and deionized water, then in ethylene glycol solution, add benzotriazole, mercaptobenzothiazole, sodium benzoate, glucose successively Sodium nitrate, cinnamic acid, borax, sodium phosphate, sodium nitrate, sodium hydroxide, defoamer and dyes, each time after adding one raw material, stir, after the solution is clarified, add the next raw material to prepare antifreeze . The mass percent of each component in the antifreeze solution is shown above.

[0036] The main performance index of embodiment 1 is as shown in table 1.

[0037] Table 1

[0038] serial number

Test items

test value

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Embodiment 2

[0047] Example 2: An antifreeze solution suitable for regions with the lowest temperature of -20°C

[0048] A kind of antifreeze used for solar water heaters, 100kg in total, is composed of the following components by mass percentage:

[0049]

[0050] The preparation method of the antifreeze of embodiment 2 is made into ethylene glycol solution with liquid ethylene glycol and deionized water, then in ethylene glycol solution, add benzotriazole, mercaptobenzothiazole, sodium benzoate, glucose successively Sodium nitrate, cinnamic acid, borax, sodium phosphate, sodium nitrate, sodium hydroxide, defoamer and dyes, each time after adding one raw material, stir, after the solution is clarified, add the next raw material to prepare antifreeze . The mass percent of each component in the antifreeze solution is shown above.

[0051] The main indicators of this embodiment are shown in Table 3.

[0052] table 3

[0053] serial number

Test items

test value

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Abstract

The invention discloses an anti-freezing fluid for a solar water heater. The anti-freezing fluid is composed of the following components by weight percent: 36-57 percent of glycol, 0.1-0.4 percent of 1H-Benzotriazole, 01.-0.4 percent of mercaptobenzothiazole, 0.5-2 percent of sodium benzoate, 0.1-0.5 percent of sodium gluconate, 1-2 percent of cinnamic acid, 0.5-2 percent of borax, 0.1-1 percent of sodium phosphate, 0.15-0.25 percent of sodium nitrate, 0.1-0.3 percent of sodium hydroxide, 0.005-0.03 percent of an antifoamer, 0.001-0.006 percent of dye and deionized water in balancing amount. The anti-freezing fluid is good in stability, has the PH rangeability smaller than that of a common anti-freezing fluid at high temperature for a long time, does not separate out particles and flocculent precipitates to block a pipeline, and has good rust inhibition effect on metal material for manufacturing the solar heater. Moreover, the invention further provides a preparation method for the anti-freezing fluid, which is simple and easy to operate.

Description

technical field [0001] The invention relates to an antifreeze liquid and a preparation method thereof, in particular to an antifreeze liquid used in a solar water heater and a preparation method thereof. Background technique [0002] China is the world's largest producer and consumer market of solar water heaters, but at present, in solar heating systems, the heat transfer medium used is mainly the antifreeze fluid of automobile engines. Ordinary car engine antifreeze is made of ethylene glycol, which can solve the problem of solar water heaters freezing in winter. The operating temperature of solar water heaters is often higher than that of automobile engines, and can reach above 100°C in the case of stuffy sun. Therefore, higher requirements are put forward for the corrosion resistance and stability of the heat exchange medium. Ordinary antifreeze is particularly corrosive to aluminum and cast iron under long-term high-temperature operation, and the common silicate system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/20
Inventor 李开春尧克光贾晨晖梁民博
Owner RICHU DONGFANG SOLAR ENERGY
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