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    Home > Active Ingredient News > Drugs Articles > Application analysis of spray dryer in flue gas treatment system

    Application analysis of spray dryer in flue gas treatment system

    • Last Update: 2012-05-30
    • Source: Internet
    • Author: User
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    Each drying equipment has its specific scope of application, and each material can find several drying equipment that can meet the basic requirements, but only one Zui is suitable for If the model selection is improper, the user should not only bear the unnecessary one-time high purchase cost, but also pay a heavy price in the whole service life, such as low efficiency, high energy consumption, high operation cost, poor product quality, and even equipment and devices can not operate normally at all The following are the general principles for selection of drying equipment It is difficult to say which one or several items are important for Zui The ideal selection must be focused on according to its own conditions, sometimes it is necessary to compromise 1 Applicability ----- the drying equipment must first be suitable for specific materials and meet the basic use requirements of material drying, including good handling of materials (feeding, conveying, fluidization, dispersion, heat transfer, discharge, etc.), and meet the basic requirements of treatment capacity, dehydration, product quality, etc 2 High drying rate - only in terms of drying rate, the material is highly dispersed in hot air during convection drying, with low critical moisture content and fast drying rate In addition, with the same convection drying, different drying methods have different critical moisture content, so the drying rate is also different 3 Low energy consumption ---- different drying methods have different energy consumption indexes In general, the thermal efficiency of conduction drying can reach 100% theoretically, and that of convection drying can only reach about 70% 4 Save investment ---- for drying device with the same function, sometimes its cost is quite different, the lower one should be selected 5 Low operation cost - equipment depreciation, energy consumption, labor cost, maintenance cost, spare parts cost, etc shall be as low as possible 6 The drying device with simple structure, sufficient supply of spare parts, high reliability and long service life is preferred 7 Meet the requirements of environmental protection, good working conditions and high safety 8 Before selection, Zui should be able to make drying experiments of materials and have a deep understanding of the drying devices (advantages and disadvantages) already used for similar materials, which is often helpful for proper selection 9 Not totally relying on past experience, paying attention to absorbing new technology and listening to experts' opinions At present, the low automation level and backward control means of domestic drying equipment are common problems At present, it is not difficult to solve the control problem of drying equipment at the level of automation, but what Zui lacks is the reasonable combination of automatic control technology and drying equipment Different materials require different dryers Similarly, different materials have different requirements for control means The function of automatic control in dryer is well known, but its one-time investment is also a concern of Zui Sometimes the investment of control equipment even exceeds that of dryer machinery According to the requirements of dryer and drying process, it is also a research topic to determine the reasonable control plan and the appropriate control means for the specific drying project In addition, we should also pay attention to the scale-up research of drying equipment Amplification involves fluid mechanics, mechanics, thermodynamics, heat transfer, materials science, dust removal, corrosion prevention, electrical appliances, control and other disciplines There are likely to be some problems in the amplification process Therefore, the enlargement of drying equipment is not simply geometric enlargement In this respect, to a large extent, it depends on the experience of industrialization, the mastery of material properties and the understanding of drying equipment The possible phenomena in the amplification process should be predicted rationally and objectively, and the corresponding scheme should be put forward The so-called study of amplification effect is to accumulate practical experience and summarize lessons while mastering drying theory and technology.
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