Mining temperature reduction coolant and preparation method thereof
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A cold storage agent and cooling agent technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of short cold storage time, high cost, harmful substances, etc., and achieve good flexibility, simple preparation, and large phase change The effect of latent heat
Inactive Publication Date: 2010-09-08
ANHUI PROVINCE COAL SCI RES INST
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Problems solved by technology
The deficiencies of the cold storage agents prepared by the above-mentioned technical solutions are that the cold storage time is short, the cost is high, and some have defects such as harmful substances, which cannot meet the working requirements of workers working for a long time under high-temperature mine conditions.
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Embodiment 1
[0022] The mine cooling and storage agent includes the following raw materials by weight:
[0023] 6 kg of polyvinyl alcohol, 15 kg of 10% borax solution, 4 kg of propylene glycol, and 75 kg of water.
[0024] The specific preparation and operation method of the cold storage agent is as follows:
[0025] a. According to the above formula, add polyvinyl alcohol and water into the container, and heat to 85~95℃ while stirring to melt the polyvinyl alcohol completely;
[0026] b. Stir the reaction vessel continuously, add freezing point cooling agent to make it evenly mixed;
[0027] c. Add 10% borax solution, stir until the mixture is uniform, and keep it at this temperature for 10 minutes to prepare the cold storage agent;
[0028] d. Pour the prepared cold storage agent into a forming container, freeze and shape it in an ice room below -15°C, then thaw the shaped cold storage agent at room temperature and fill it into the packaging bag to obtain the finished product.
[0029] The initial m...
Embodiment 2
[0031] The mine cooling and storage agent includes the following raw materials by weight:
[0038] The specific preparation and operation method of the cold storage agent is the same as in Example 1.
[0039] The initial melting temperature of the cold storage agent is -4.4°C, and the latent heat of melting is 225.5J / g.
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Abstract
The invention relates to a mining temperature reduction coolant and preparation method thereof. The invention takes macromolecular compound polyvinyl alcohol as basic raw material, cross-linking agent in certain proportion is added, wherein the cross-linking agent is 10% borax solution and the like; then freezing point temperature reduction auxiliary agent is added to prepare gel-like coolant, the prepared coolant is injected into a forming container and is frozen and formed in an icehouse the temperature of which is lower than minus 15 DEG C, and then the formed coolant is unfrozen at room temperature and is filled into a packaging bag. The mining temperature reduction coolant of the invention has the following characteristics: (1) elasticity and flexibility are good, comfortable sensation can be obtained when human body touches the coolant; (2) cold accumulation material has major latent heat of phase change and appropriate phase change temperature; (3) the coolant can be repeatedly used, can not be cataklastic, can not contract and can produce no separated water; (4) the coolant can be in close contact with human body when in use, and refrigeration effect can be fully played; (5) no toxin, odour or pollution is produced; (6) cold insulating plate and cold insulating bag of the outer packing of the coolant has the function of 'environmental protection and high efficiency cold insulation heat preservation'.
Description
Technical field [0001] The invention relates to a mine-used cooling and cold storage agent and a preparation method, belonging to the technical field of cold storage, and particularly suitable for personal protection in deep high-temperature mines. Background technique [0002] Coal mines are one of the main energy sources in our country. With the development of society and the increasing development of coal resources, the depth of mine mining is getting deeper and deeper, and there are more and more high temperature and heat damage mines. At present, the world's major coal mining countries have successively entered deep mining, and the mining depth has gradually increased, and the ground temperature has also risen. According to measurement data from all over the world, the global average temperature gradient is about 3℃ / 100m. The heat source of high-temperature thermal damage in mines mainly comes from the influence of air self-compression heat release, surrounding rock heat d...
Claims
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