Date : 2014/9/2 11:23:26 | Hit :
Drying equipment also called drier and drier. For dry operation equipment, through the heating material the wet points (generally refers to water or other can be volatile liquid composition) vaporizing escape, to get provisions wet content of solid materials. Dry the purpose is to material use or further processing needs. Such as wood in making block model, wood before drying can prevent product deformation, ceramic blank in calcined two paragraphs before drying equipment dry can prevent finished crack. Another after drying of material also facilitate transportation and storage, such as harvest food drying to a certain moisture content the following, to prevent mildew. Due to the natural drying far cannot satisfy the needs of the development of production, all kinds of mechanized dryer is more and more widely applied.
Since ancient times, man used to use natural heat source and natural ventilation to dry material, completely under natural condition restriction, production capacity is low。 With the development of production, they gradually for artificial can control the heat source of the mechanical ventilation and dehumidification of means。
Modern dryer began to use intermittent operation of the fixed bed dryer. In the middle of the 19th century, trunk dryer use, marks the dryer by intermittent operation to continuous operation direction development. Rotary drum dryer is a good way to realize the particle material agitation, drying ability and strength can be improved. Some industry to adapt to the development of the industry respectively for continuous operation dryer, such as textile, papermaking industry drum dryer.
But in the early 20th century, dairy production began to use spray dryer for large-scale drying liquid material provides a powerful tool. 40 s, along with the fluidization technology development, the high strength, high productivity expanded bed and flow dryer arise. And freeze sublimation, and dielectric type dryer is satisfy special requirements to provide a new way. 60 s developed far infrared and microwave drier.
the content of science and technology leading role at the beginning of the show. Since 2004, under the chemical development situation hold up well drive, drying equipment market situation steady value, production enterprise is obtained the good business performance. At present drying equipment service chemical industry significant characteristic is technical content of increasingly prominent role. The past sales products mainly rely on price competition has been very different. Among them, some drying equipment with high technical content, pay attention to the development of new products manufacturers, the increasing benefit; On the contrary, some product technology content is low, new products and new technology development ability weak enterprise, the benefit began to drop.
Market reaction shows that the chemical industry look forward to drying equipment manufacturing industry according to the high quality, low energy consumption, environmental protection requirements of adjust product structure, further strengthen basic research, to solidify the application research and development foundation. In the technology, strengthen the automation, testing, manufacturing process and material appearance design research. In the application development, both must pay attention to the international exchange and cooperation, and to pay attention to the protection of intellectual property rights; Should not only pay attention to new technology and new application fields of development, and should pay attention to the traditional process and traditional application fields of innovation and innovation.
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