Flash Dryers often encounter product and equipment malfunctions due to various factors such as operating methods and material changes. Below, we explain the causes and solutions for the seven common types of malfunctions for the benefit of all users:
1. Fault Phenomenon: High Moisture Content in Product
Analysis: Excessive low exhaust temperature
Approach: Reduce the amount of materials entering and increase the exhaust air temperature
2. Fault Phenomenon: Low Moisture Content in Product
Analyze the cause: The exhaust temperature is too high.
Approach: Increase material intake to lower exhaust air temperature
Issue: Rapid decrease in mixing temperature, resulting in reduced or no product output.
Analysis reasons: (1) Excessive material inflow, leading to insufficient evaporation; (2) Sudden drop in inflow air temperature; (3) High moisture content in the material.
Approach: (1) Reduce the incoming material volume, (2) Adjust the import/export temperature to an appropriate level, (3) Modify the inlet air temperature and feeding speed, (4) Reset the feeding parameters and fan air volume.
4. Fault Phenomenon: Reduced evaporation rate, decreased output
Analysis Reasons: (1) Reduced air volume in the entire system, (2) Low import temperature of the hot air, (3) Equipment has air leaks, (4) Decreased pressure of compressed air, (5) The high-pressure pulse bag dust collector may not have been cleaned for an extended period, causing blockage.
Procedures: (1) Verify the centrifugal fan's speed and ensure the outlet butterfly valve is correctly positioned; (2) Check for reduced steam pressure, clogged air filters, and heating element pipes; (3) Inspect for sealed connections between all equipment components; (4) Clean or replace the dust collector bags; (5) Increase the compressed air pressure.
5. Fault Phenomenon: Excessive impurities in finished products
Analysis Reasons: (1) Inadequate air filter performance, (2) Contamination of finished products with accumulated powder, (3) Incomplete equipment cleaning, (4) Low purity of raw materials.
Procedures: (1) Replace or clean the filter, (2) Inspect for any coking at the hot air inlet, (3) Re-clean the equipment, (4) Test the purity of the raw materials.
6. Fault Phenomenon: Excessive vibration of the main motor or product being too coarse.
Analysis reasons: (1) Malfunctioning of the mixer motor, (2) Severe wear on the motor belt, (3) Obstruction within the main unit, (4) Sudden increase in feeding speed
Solution: (1) Turn on the mixing motor, (2) Replace the motor belt, (3) Shut down for inspection, (4) Adjust the feeding speed
7. Fault Phenomenon: Low product efficiency and excessive powder loss
Analysis: (1) Inefficient cyclone separator performance; (2) damaged bags within the high-pressure pulse bag dust collector; (3) loose installation of dust bags.
Treatment Methods: (1) Inspect the cyclone separator for any deformation due to impact or collision, (2) Improve the airtightness of the cyclone separator's inlet and outlet, check for any material accumulation blocking the inner wall and discharge port, (3) Verify if the dust filter bags are loose, and if there are any tears, (4) Replace the high-pressure pulse bag dust collector.
Throughout the production, sales, and use of our equipment, new issues may arise continuously. We kindly request all users to promptly provide us with feedback, so we can improve and enhance our equipment. This will ensure that users can enjoy higher quality and more cost-effective drying equipment.
Introducing the advantages of the flash drying machine:
With a team of highly qualified professionals, robust technical capabilities, and superior metal processing techniques, our flash drying machines are enjoying widespread popularity and high praise from customers across various regions. What are the advantages of our flash drying machines compared to other drying equipment? Check out the following introduction:
The flash drying machine is a drying equipment that integrates both drying technology and fluidization technology, overcoming the drawbacks of high energy consumption in drying equipment and uneven drying in fluidized bed dryers. It combines the strengths of both, becoming an ideal drying equipment with features such as energy saving and rapid drying. The flash drying machine is particularly suitable for the direct drying of pasty and filter cake materials, compensating for the low efficiency and small output of scraper dryers; and improving the complex process of spray drying equipment, which involves dilution before spray treatment. In practical applications, the flash drying machine is widely adaptable for the drying of high-viscosity, high-viscosity, and thermosensitive pasty materials in various chemical industries, including light industry, petrochemicals, chemical fibers, food, mining, coatings, dyes, and intermediates.
In summary, the flash drying machine strengthens the heat transfer effect between gas and solid, shortens drying time, and significantly improves product yield and quality, all thanks to its advanced technology, compact design, simple operation, easy maintenance, and energy-saving features.
Specifically, the flash drying machine offers the following advantages: 1. The feeder performance of the flash drying machine maintains continuous and stable feeding, without causing bridging, arching, or clumping phenomena, particularly suitable for sticky materials.
The internal conical structure at the bottom of the drying chamber, along with the airflow's scrubbing and stirring action, and the unique design of the agitator, all contribute to the flash dryer's efficiency in handling sticky materials.
3. The flash dryer offers a short drying time, with a high relative velocity between the material and hot air, and the hot air does not come into direct contact with the dried material, making it suitable for processing heat-sensitive materials.
4. The drying room features high circumferential air velocity, resulting in short material residence time, effectively preventing material adhesion to the walls and the deterioration of heat-sensitive materials.
The drying chamber is equipped with a water jacket cooling device at the bottom, preventing material from undergoing heat-induced degradation in the high-temperature zone.
6. During the flash drying process, the material is subjected to crushing, scrubbing, and collision, which increases its surface area, thereby enhancing the drying and resulting in a higher material drying intensity.
7. By incorporating internal components (such as cyclone sheets, ceramic sintering rings, or classifiers) within the dryer tower of the flash drying machine and coordinating the inlet and outlet air temperatures, the equipment effectively controls the final moisture content of the material and the fineness of the finished product.
The drying room's bottom is equipped with a water-jacket cooling system, preventing material from undergoing heat-induced degradation in the high-temperature zone at the bottom.
9. The flash drying equipment operates under micro-negative pressure, eliminating environmental pollution during operation. Different dedusting methods and materials (pulsed bag dust collector, water bath dust collector, Venturi wet dedusting system, etc.) are adopted based on different materials, ensuring a clean working environment and meeting environmental protection standards.
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