Based on the the vacuum dryer presence of the advantages and disadvantages to analyze the trend of the future development of vacuum dryer
   There are many advantages of vacuum dryer: drying at low pressure, low oxygen content, can prevent the oxidative deterioration of dry material can be dry and inflammable and explosive dangerous goods; vaporization of the moisture in the material at low temperatures, easy to dry heat sensitive materials; dry material in precious and useful ingredients can be recovered; prevent dry material in the emissions of toxic and hazardous substances, can become environmentally friendly types of "green" dry. Therefore, the increasingly widespread application of vacuum dryer equipment.
  The vacuum drier The main drawback is the need of a vacuum system, capable of pumping steam so that equipment investment is high cost and the running cost is high; equipment, production efficiency is low, the output is small. To overcome these shortcomings, many technology workers, made a lot of effort. In the same time, due to the vacuum drier has many advantages, some products have to adopt a vacuum dryer. Therefore, the development of the vacuum dryer promising.
  Vacuum Dryer development is slow, there is one important reason is mutual imitation, hovering on the same technical level, the lack of innovation. Imitation ability, speed, innovative ideas, and a small investment. Focus on competition to grab market, Latin America, the price war. Better practice in quality and after-sales service, and some effort. But these are not the good way of the development of vacuum dryer must invest human, material and financial resources to be innovative.
  Energy conservation is the key to the development of vacuum dryer
  The energy shortage has been a concern all over the world, the traditional concept that the energy consumption of the vacuum dryer, because it needs to add the vacuum pump. But have not seen the same kind of material, when dried to the same moisture content, the real energy consumption comparison. In fact, the vacuum drying is in the enclosed space in the low temperature drying, the energy wastage is relatively small. Nevertheless, the vacuum dryer energy saving is the key to development. Compared with other types of dryer, vacuum dryer energy saving focus should be placed on the rational design, selection and use of vacuum systems.
  Vacuum system is not capable of pumping steam mainly into two categories, one is directly pumping steam pump, water jet pump, steam jet pump, water ring pumps and wet Roots pump; another type way to catch condensation water. These two approaches, energy consumption is higher, the direction of the former type of energy-saving should be to increase the efficiency of the pumping; direction of the latter class of energy-saving design, such as gas-solid phase change heat transfer and thermal efficiency.
  Vacuum dryer equipment innovation. Problems are also a lot of, if production, learning and research can cooperate closely the results will be more significant.
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