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    • 吸附式干燥機和吸附劑的關系
    • 本站編輯:杭州天源氣超濾設備工程有限公司發布日期:2022-04-18 09:24 瀏覽次數:

    吸附式干燥機(吸干機)工作原理是利用吸附劑吸附水分的特性來降低壓縮空氣中水分的含量,一般吸干機出口氣的壓力露點可達到-20℃~-70℃。

    常見的吸干機吸附劑有活性氧化鋁、分子篩等,而吸干機要獲得極干燥壓縮空氣時,分子篩是的選擇。

    活性氧化鋁,它是一種多孔性、高分散度的固體材料,有很大的表面積,其微孔表面具備催化作用所要求的特性,如吸附性能、表面活性、優良的熱穩定性等,所以被廣泛地用作化學反應的催化劑和催化劑載體。

    分子篩是指具有均勻的微孔,其孔徑與一般分子大小相當的一類物質,分子篩的應用非常廣泛,可以作高效干燥劑、選擇性吸附劑、催化劑、離子交換劑等。

    與其他吸附材料相比,分子篩的比較大特點是具有均一直徑的微孔結構,因而能有選擇性地吸附直徑小于其孔徑的氣態分子。

    分子篩一般都是人工合成的,在空氣干燥分離工藝中得到較多的分子篩是沸石型硅鋁酸鹽的多水化合物晶體。

    其熱穩定性和化學穩定性很高,而且還同時具有篩分性能、離子交換性能、選著單一性和吸附性能良好等特點,通常被應用于吸附式干燥機吸附腔體中。

    The working principle of the adsorption dryer (suction dryer) is to reduce the moisture content in the compressed air by using the moisture adsorption characteristics of the adsorbent. Generally, the pressure dew point of the outlet air of the suction dryer can reach - 20 ℃ ~ - 70 ℃.

    The common adsorbents of the dryer include activated alumina and molecular sieve. When the dryer wants to obtain extremely dry compressed air, molecular sieve is the only choice.

    Activated alumina, which is a porous and highly dispersive solid material, has a large surface area. Its microporous surface has the characteristics required by catalysis, such as adsorption performance, surface activity, excellent thermal stability and so on. Therefore, it is widely used as catalyst and catalyst carrier for chemical reaction.

    Molecular sieve is a kind of material with uniform micropores and its pore size is equivalent to the general molecular size. Molecular sieve is widely used as high-efficiency desiccant, selective adsorbent, catalyst, ion exchanger and so on.

    Compared with other adsorption materials, the biggest feature of molecular sieve is its microporous structure with uniform diameter, so it can selectively adsorb gaseous molecules with diameter less than its pore size.

    Molecular sieves are generally synthetic. Most of the molecular sieves obtained in the air drying separation process are zeolite aluminosilicate polyhydrate crystals.

    It has high thermal and chemical stability, and also has the characteristics of screening performance, ion exchange performance, singleness of selection and good adsorption performance. It is usually used in the adsorption chamber of adsorption dryer.