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Help CenterSodium Hydroxide Rotary Flash Dryer, Flash Drying Equipment for Chemicals, Non-standard Customization
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Overview of Rotary Flash Dryer Equipment:
The flash dryer (also known as rotary flash dryer, instantaneous dryer) is a high - efficiency, continuous drying equipment, specifically designed for processing difficult - to - dry materials such as paste, filter cake and high - viscosity liquid.
The flash dryer ingeniously combines fluidized bed, pneumatic drying and crushing technology. Its core working principle is: the wet material is fed into the bottom of the drying chamber and meets the high - speed rotating crushing agitator at the bottom, and is instantly dispersed and crushed. Meanwhile, the high - temperature hot air (usually 400 - 700°C) rising at high speed is fully mixed with these dispersed tiny wet material particles. The material is suspended, fluidized and completes the heat and mass transfer process in a very short time (usually a few seconds to tens of seconds), and the moisture is rapidly evaporated. The dried fine powder enters the cyclone separator and bag filter with the airflow for collection, and the tail gas is discharged.
This "bottom crushing + instantaneous convection of hot air" mode enables it to effectively solve the drying problems of high - moisture and high - viscosity materials.
Flow Chart of Rotary Flash Dryer System
Main Advantages and Features of Flash Dryer:
Unique Advantages in Processing Materials
No pre - treatment required: It can directly process high - viscosity and high - moisture materials such as paste, filter cake and mud, eliminating the cumbersome pre - treatment processes such as dilution and granulation.
"One - step" drying: It integrates drying, crushing and screening. While drying, the material is continuously crushed and classified by the bottom crushing device and high - speed airflow, and finally a uniform fine - particle product is obtained.
High Efficiency and Energy Saving
High drying intensity: Since the material is highly dispersed and has a huge contact area with the high - temperature hot air, the heat and mass transfer rate is extremely fast, and the evaporation capacity per unit volume is large.
High thermal efficiency: The high-temperature gas is in co-current contact with the wet material, resulting in a large temperature difference at the inlet. The power consumption is relatively low, and the comprehensive thermal efficiency is relatively high.
Good product quality
Controllable temperature, suitable for heat-sensitive materials: Although the inlet air temperature is very high, due to the rapid evaporation of water in the material carrying away a large amount of heat and the extremely short residence time, the actual temperature of the material is much lower than the outlet air temperature, which can effectively prevent the material from overheating and denaturing and maintain its activity.
Uniform product particle size and good fluidity: By adjusting the speed of the crusher and the air volume, the particle size and moisture of the final product can be controlled.
Convenient operation and control
Continuous automated production: It can realize continuous automated operation from feeding, drying to powder collection, which is suitable for large-scale industrial production.
Negative pressure operation of the system: The entire system operates under a slight negative pressure, so dust is not easy to escape, the working environment is clean, and the safety is high.
Compact structure and relatively easy maintenance
The main body of the equipment is a vertical structure, which occupies a small area.
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The main moving part is the crushing agitator at the bottom, with a relatively simple structure and concentrated maintenance points.
Typical application fields of flash dryers:
Inorganic chemicals:Calcium carbonate, kaolin, silica, aluminum hydroxide, various metal hydroxides, pigments, catalysts, etc.
Organic Chemicals:Dyes, pigment intermediates, pesticides (such as glyphosate), flame retardants, resins, etc.
Minerals and Metallurgy: Ceramic raw materials, bentonite, various metal ore powders, sludge, etc.
Food and Feed:Starch, soy protein, corn syrup, yeast, distillers' grains, etc. (Food-grade configuration and heat source are required).
Technical Parameter Table of Flash Dryer:
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