Surfactant means a substance that can significantly reduce the surface tension of the target solution. It has a fixed hydrophilic and oil-wet group, which can be arranged directionally on the surface of the solution. The molecular structure of surfactant has two sexes: one end is hydrophilic group, the other end is hydrophobic group; Hydrophilic groups are often polar groups, such as carboxylic acid, sulfonic acid, sulfuric acid, amino or amine groups and their salts, hydroxyl, amide groups, ether bonds can also be polar hydrophilic groups; Hydrophobic groups are usually nonpolar hydrocarbon chains, such as more than 8 carbon atoms. Surfactants include ionic surfactants (including cationic surfactants and anionic surfactants), non-ionic surfactants, amphoteric surfactants, compound surfactants and other surfactants, etc Imported Premium Surfactant,Imported Premium Ampholytic Surfactant,Imported Premium Nonionic Surfactant,Imported Premium Ionic Surfactant Xingbang High Molecular Materials Co., Ltd. , https://www.chemicaladditive.com
Many friends who care about the drying market are hard to recognize the method of purchasing the drying device. The following are the general principles for the selection of the drying device. It is difficult to say which one or which items are important. The ideal selection must be based on its own conditions. Focused on, sometimes compromises are necessary.
1. Applicability ------- The drying device must first be applicable to specific materials and meet the basic requirements for drying of materials, including the ability to process materials well (feed, transport, fluidize, disperse, pass Heat, discharge, etc.), and can meet the basic requirements of processing volume, dehydration amount, product quality and so on.
2. High drying rate---only in terms of drying rate, the material is highly dispersed in hot air during convection drying, the critical moisture content is low, the drying speed is fast, and the same convection drying, the drying method has different critical moisture content, so The drying rate is also different.
3. Low energy consumption ------- Different drying methods have different energy consumption indexes. Generally, the thermal efficiency of conductive drying can reach 100% theoretically, and convection drying can only be about 70%.
4. Saving investment-----Drying equipment that performs the same function, sometimes its cost difference is very different, should choose the lower one.
5. Low operating costs - equipment depreciation, energy consumption, labor costs, maintenance costs, spare parts costs, etc. should be as low as possible.
6. Prefer the drying device with simple structure, sufficient supply of spare parts, high reliability and long service life.
7. Meet environmental protection requirements, good working conditions and high safety.
8. Before the selection, Zui can make the drying experiment of the material, and deeply understand the drying device (extension and disadvantage) that has been used in similar materials, which is often helpful for proper selection.
9. Not relying entirely on past experience, focusing on absorbing new technologies and listening to expert opinions.
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Basic ideas for drying equipment selection
In the dry market, we all know that each type of drying device has its specific application range, and each material can find several drying devices that can meet the basic requirements, but there is only one suitable for Zui. If the selection is not appropriate, in addition to the unnecessary one-time high procurement cost, the user has to pay a heavy price throughout the lifetime, such as low efficiency, high energy consumption, high operating cost, poor product quality, and even device fundamentals. Can't run normally and so on.