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E-mail
jwdry8166@163.com
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Phone
13915898166
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Address
Jiaoxi Industrial Park, Zhenglu Town, Tianning District, Changzhou City, Jiangsu Province
Changzhou Jinwang Drying Equipment Co., Ltd
jwdry8166@163.com
13915898166
Jiaoxi Industrial Park, Zhenglu Town, Tianning District, Changzhou City, Jiangsu Province
For a clear understanding, let's first set aside the fluidized bed and only focus on the operating mode.
| feature | Batch dryer | Continuous dryer |
|---|---|---|
| Operation method | Input a fixed amount of materials at once, discharge them all after drying, and then proceed to the next batch. | The material is continuously fed, moved within the equipment, dried, and continuously discharged. |
| Applicable for production | Materials with small batches, multiple varieties, high value, and long drying time. | Large scale, single variety, continuous industrial production. |
| Control and Quality | Easy to control, with uniform product quality within the same batch. But there may be differences between batches. | Accurate control of parameters is required to maintain stable product quality. Once stable, the product consistency is very good. |
| Energy consumption and efficiency | The heat utilization rate is relatively low, and the equipment starts and stops frequently. | High thermal efficiency, relatively low energy consumption, suitable for long-term continuous operation. |
| equipment cost | Relatively low. | Relatively high. |
| for example | Oven, batch fluidized bed dryer. | Continuous fluidized bed dryer, spray dryer, flash dryer, belt dryer. |
Now, let's enter the core comparison: willContinuous fluidized bed dryerAs a typical continuous drying equipment, compare it with other common continuous dryers.
working principleHot air is blown into the bottom porous plate at a certain speed, causing the solid particles inside the dryer to "float" and enter a fluidized state similar to liquid boiling. The material flows in the bed while moving from the inlet to the outlet, completing heat and mass exchange and achieving the purpose of drying.
Core Features：
The gas-solid contact efficiency is extremely highFluidization allows particles to mix thoroughly with hot air, resulting in fast heat and mass transfer rates and high drying intensity.
Uniform temperatureDue to strong mixing, the temperature distribution inside the bed is very uniform.
Suitable for specific materialsVery suitable for powdery, granular, and crystalline materials (with a particle size range of approximately 0.1mm-5mm). The effect is not good for materials that are prone to bonding and clumping.
versatileIn addition to drying, it can also integrate functions such as cooling and granulation.
| Drying machine type | working principle | Main Features | Comparison with continuous fluidized bed |
|---|---|---|---|
| Spray dryer | Atomize liquid materials (solution, suspension, lotion) into tiny droplets, contact with hot air, and dry into powder in seconds. | -Handling liquid materialsThe direct solution. -The product is in powder formThe granularity is relatively fine. -Extremely high evaporation intensityThe drying speed is extremely fast. -Relatively low thermal efficiencyThe inlet temperature is high, and the exhaust temperature is also high. | The fundamental difference lies in the feeding statusWhat is processed by fluidized bedWet solidSpray dryingliquidThey are the relationship between upstream and downstream processes. |
| Flash drying machine | Wet materials (paste like, filter cake like) are mixed with hot air at the bottom of the dryer and crushed. The particles are carried up by the hot air and instantly dried during transportation. | -Suitable for paste like and cake like materials. -Integrationsmashanddryfunction -The drying time is short (a few seconds). -The product is an uneven powder. | Different forms of processed materialsFlash evaporation drying is specifically designed to handle high humidity and easily sticky paste like materials, while fluidized beds are more suitable for materials that have already taken on granular form.The existence form of materials inside the equipment is differentFlash drying is air flow transportation, while fluidized bed is a "boiling" bed layer. |
| Belt dryer | Lay the material flat on the conveyor belt, and dry it by passing hot air through or blowing through the material layer. The material moves slowly with the mesh belt. | -Wide adaptability to material form(Sheet, strip, granular, filter cake, etc.). -Mild drying processThe material damage rate is low. -large footprint. -The contact efficiency between hot air and materials is lower than that of flow |