Therefore, in the selection of drying equipment, we must first comply with the principles of applicability, high drying rate, low energy consumption, investment saving, low operating costs, and environmental protection. The second is to consider the different physical and chemical characteristics of drying materials, drying requirements, the company's production conditions and development planning and other factors. The physical and chemical properties of the material include morphology, water content, water content, crystal water, particle size, bulk density, viscosity, heat sensitivity, softening point, phase change point, crystal or particle friability, etc. Under the conditions of the drying curve, critical moisture content, equilibrium moisture content; the impact of the commodity value and drying effect of the material, such as product moisture, pollution, temperature, wear, powdering, crushing, rehydration and so on. Also consider the requirements for the material recovery rate and the sequential processes of the material drying process.
In the actual choice of drying equipment, in addition to the adaptability of the equipment itself, the physical properties of the material, auxiliary machinery, auxiliary materials, pollution and expenses (equipment fees, operating costs), etc. shall be taken into consideration, and the appropriate attachments shall be selected and finally passed. Experimentally determined. To sum up the selection of drying equipment, the following indicators should be examined:
(l) Production capacity, type (intermittent, semi-continuous, continuous)
(2) Initial, terminal moisture content
(3) Particle size, size distribution (solid particles)
(4) Drying Motility, Suction Reduction
(5) The best working temperature
(6) Explosiveness (steam/air, dust/gas)
(7) Toxicity (related parts)
(8) Drying medium (convection drying with air, steam, inert medium, etc.)
(9) Corrosion
(10) Physical and chemical data
(11) Physical processing characteristics
(12) Environmental and Safety Regulations
(13) Land occupation requirements
(14) Dry energy consumption
(15) Whether post-processing is required (in a continuous unit, cooling, coagulation, coating, packaging, etc.)
(16) Past experience (generally not applicable to new dryers)
(17) Heat recovery requirements (energy consumption)
(18) Pretreatment requirements (peening, centrifugation, vacuum infiltration)
(19) Material grinding characteristics
(20) Media type (inert media, oxygen-poor media, steam or air)
Drying equipment selection should examine what indicators? ——One of the user’s questions asked by General Manager Xie Xiefang of Vanguard Drying
The type of drying equipment is varied. Each type of drying equipment has its own specific scope of application. Each kind of material can find several types of drying equipment that can meet basic requirements, but the most suitable one is only one type. If the selection is improper, users must pay a heavy price for the whole life cycle in addition to the unnecessary one-time purchase cost.