Kunshan Qi Lin Environmental Protection Technology Co., Ltd.
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Trust us silica gel desiccant is not unfamiliar, and now regardless of the export business or family are inseparable from the silica gel desiccant. This is also the best selection of boring moisture top But you know how much silicone drier? It seems that we look like all the desiccant are the same now by Xiaobian take you into the international desiccant, what is the desiccant, what is the use of desiccant, desiccant can be divided into several categories? What is the quality of silicone boring?
Porous silica desiccant The appearance of the product was white, translucent glass. Mainly used for dry, moisture-proof, can be used as a catalyst carrier and dehydration of organic compounds. Because of its high bulk density and low moisture absorption under the significant characteristics. Can be used as an air purifier to remove moisture from the air to control air humidity. In maritime applications are also widely used, but also as two layers of parallel between the dehumidification seal glass, glass can adhere to the transparency.
The appearance of the product was white, a block, spherical, microspherical three categories. Hygroscopicity is more pronounced under higher relative humidity. Commonly used as a dehydrating agent and desiccant, catalyst carrier, together with the removal of organic acids and water in the transformer insulating oil. Other because of its larger aperture, silicone material is still deep processing. Blue Silicone Desiccant: This product is a highly porous structure. Blue, translucent, moisture absorption of its color from the blue into a light red, with the general use of spherical silica gel mixed indicator, to indicate the desiccant water saturation, mainly for dry moisture.
Silica gel desiccant has become the most commonly used desiccant on the market. Especially with regard to the export of products, most companies regard the silica gel desiccant as the top choice of "boring, moisture-proof". However, because of the silica gel manufacturers in the geographical resources, production technology, quality control, business management and other aspects of the requirements, it also resulted in the quality of their products produced by the good or bad. However, the use of downstream desiccant manufacturers, in the absence of professional testing equipment, mainly through the naked eye investigation and some simple ways to determine product quality, which resulted in some serious impact on the recognition of good quality silicone desiccant products Bad misunderstanding. Below, I summed up these errors and explain it for reference.
First, on the adsorption capacity, the determination of water content
About the determination of water content of silica About the most commonly used methods of application of desiccant are the following:
1, take a small amount of silica gel desiccant into the water, to investigate the intensity of its encounter with water blasting: blasting fast, intense blasting effect, then that product moisture content is low, the amount of adsorption is good.
Note: In fact, the silica gel desiccant water blasting rate and the water content of silica gel, the amount of adsorption is not much contact. It does not show well the desiccant's water absorption because "burst" or not is only for a while, while the asperities of the water absorption function persist. Actual proof, there are some manufacturers on the market deliberately produced a "blasting rate" good product moisture content even more than 15%, while its adsorption is far below the industry standard is completely unqualified.
2, take a small number of silica gel desiccant and a small number of sealed silica gel, discoloration discoloration discoloration investigation discoloration speed, discoloration slow proof of the product's low water content
Note: This test method is still more scientific, but can only clarify whether the detected moisture content of silica gel desiccant exceeds the color of silica gel. In addition, the respective manufacturers produce discolored silica gel, because of the different content of the added amount of the material, it will also cause its color change the speed of silica gel itself is different. Therefore, we can not completely convinced of this test.
3, take a few silicone desiccant placed in the field after weighing 2 days, weighing, accounting for the difference between the two weighing results. The difference is that the product adsorption capacity is good.
The principle of this approach is correct, but because the external environment is constantly changing, the results detected by this measure can not be completely convinced.
4, take a handful of silica gel desiccant in your hand, feel it is hot. If fever then prove its good quality.
Silica gel desiccant in the absorption of moisture will release a certain amount of heat, but simply by human feel, the method is completely incorrect
Cobalt-free color-changing silica gel desiccant Cobalt-free color-changing silica gel desiccant is orange-colored or translucent glass-like particles with a strong ability to absorb moisture and its appearance color will produce significant color change along with the addition of moisture absorption during the moisture absorption process . Cobalt-free color-changing silica gel desiccant can be used alone or in combination with fine silica gel (5% or more). When not damp was orange, moisture gradually become light green, continue to absorb moisture into dark green, you need to replace the new silica gel or regeneration. Cobalt-free color-changing silica gel desiccant is cobalt-free environment-friendly and is a substitute of blue silica gel.
After the adsorption of moisture on the silica gel, it can be regenerated by removing its moisture. There are many heating methods, such as: electric furnace heating, direct steam heating, flue heat and hot air drying and other boring. Thermal desorption temperature is generally controlled at 150 degrees Celsius (+ -50) is appropriate, the blue gel indicator should be controlled at 80-100 degrees is appropriate.