The difference of the working principle between the air-flow drier and the belt drying machine
Release time：2018-8-7 Viewed：
Air drying is also called "instantaneous drying" is the application of dilute phase conveying in solid fluidization in drying. The method is to make the heating medium and the solid particles to dry direct contact, and to dry solid particles suspended in the fluid, so the two-phase contact area is large, enhanced the heat and mass transfer process, widely used in bulk materials drying unit operation. Air dryer has a dispersion of the fan, especially suitable for heat-sensitive materials, air drying operations. High-speed spinner fan impeller, can be wet, or even caking of the material to break, until dispersed, in the dispersion process at the same time stirring, mixing, and then the material and heat flow parallel flow. This type of equipment, to adapt to the drying filter cake caking, but also belongs to the surface moisture material, moisture content ≤40%, if the amount of processing or the finished product requires dry to 15%, can be used two-stage air drying. When the material moisture content of more than 40%, but ≤60%, the feed is more difficult, should be used mixer, through the method of mixing dry material to reduce the feed water, at this time, the total production of drying equipment has a relatively large decline, which is economically uneconomical. Therefore, the user should first use the mechanical method (centrifugal dehydration or pressure filtration) as far as possible to reduce the feed water to ensure the smooth drying operation. there is no circulating air duct outside the belt dryer , the hot air is circulating in the equipment, and the circulation method according to the different material has series cycle, convection cycle, independent circulation and so on. Due to the emphasis on special requirements, according to the drying of materials to determine the air volume, temperature, relative humidity, operating speed and other technical parameters, equipment, such as production capacity, product quality, energy consumption, reliability and other major indicators and noise, insulation performance, ease of operation and other ancillary functional indicators have been improved. The difference between The air-flow drier and the belt dryer in the structure form Airflow dryer for direct feed of air dryer It is one of the most widely used, suitable for the occasion of good dispersion of wet materials and only removal of surface moisture. such as dry synthetic resins, certain drugs, organic chemicals, coal, starch and flour. If wet material moisture content is high, the feeding is easy to group, can be a part of the finished product as a return, in the mixing feeder and wet materials mixed to facilitate drying operation. Air Dryer with a dispersion of air drying device with a dispersion of the air drying device, the drying tube is equipped with a squirrel-cage disperser scattered materials. It is suitable for the bulk materials with low water content and good loose, such as the filter cake of centrifuge and filter, as well as phosphogypsum, calcium carbonate, sodium fluoride, clay, coffee residue, sludge slag, corn residue and so on. air dryer with Pulverizer air drying device with a grinder air drying device is installed under the air drying tube under an impact hammer mill to crush wet materials, reduce particle size, increase the surface area of materials, strengthen drying. Therefore, a large amount of water is evaporated in the process of crushing, under normal circumstances, can complete the gasification water component 80%. In this way, it is easy to use higher inlet humidity to obtain large production capacity and high heat transfer efficiency. Belt dryer is a batch of continuous drying equipment for the production of good air permeability of the sheet, strip, bulk material drying, for dehydrated vegetables, Chinese herbal pieces, such as high water content, and material temperature does not allow high material is particularly suitable, can be widely used in chemical, food, medicine, building materials, electronics and other industries. The basic types of drying have dehydrated vegetable special plane, rice drying special plane, Chinese herbal pieces special plane, washing cotton and washed wool special plane, roasted food special plane, plastic pellet special machine drying, there are magnetic powder, iron oxide yellow, light calcium carbonate, white carbon black drying plane.
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