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E-mail
lm@czlemar.com
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Phone
13801504088
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Address
No. 55 Wenjing Road, Jintan District, Changzhou City, Jiangsu Province
Changzhou Xinma Drying Engineering Co., Ltd
Operation Guide and Precautions of spray Dryer for Chinese Herbal Extract
Date: 2025-12-31Read: 6
The spray dryer for Chinese herbal extracts is the key equipment in the production of Chinese herbal preparations, which is widely used in the production of granules, tablets and capsules. The core principle is to convert traditional Chinese medicine extract into small droplets through atomization technology, which quickly dry into powder after contact with hot air, greatly improving production efficiency and maintaining the active ingredients of medicinal materials. This article will provide a detailed introduction to its usage, covering operational steps, parameter settings, common issues, and maintenance points.
1、 Equipment installation and preparation work
1. Equipment installation
Basic installationEnsure that the equipment is placed horizontally, the position of the drying tower is fixed, and connect the feed pipe, exhaust pipe, and power cord. Grounding is necessary during installation to ensure safe operation.
auxiliary facilitiesEquipped with exhaust ducts (recommended 1:4 ratio) to guide exhaust gases out of the room, reducing indoor humidity and noise.
integrity checkAfter installation, conduct a comprehensive inspection of the heater, atomizer, fan, and other components to ensure that they are undamaged and securely connected.
2. Preparation before the experiment
Raw material pretreatmentTraditional Chinese medicine extract needs to be filtered and concentrated to a suitable concentration (usually with a relative density of 1.1-1.2) to ensure good fluidity.
Equipment cleaningClean the contact areas such as the drying room and feeding tank, and disinfect them if necessary to avoid contamination by impurities.
Supplementary materialsPrepare air compressor, peristaltic pump, collection container, etc., and check the supply of cooling water and compressed air.
2、 Detailed explanation of operation steps
1. Power on preheating
Startup sequenceFirst, turn on the power, start the heater and fan, set the inlet air temperature (usually 150-180 ℃), preheat for 15-30 minutes until stable.
Temperature monitoringReal time monitoring using temperature sensors to ensure that the drying chamber reaches the preset value.
2. Feed spray
Feeding operationAfter preheating, start the peristaltic pump to deliver the paste to the atomizer, forming small droplets. Pay attention to the uniformity of fog droplets and avoid being too large or too small.
Parameter linkageThe feed rate needs to be coordinated with the inlet temperature and air volume, usually 10-100ml/min. For high viscosity materials, the rate needs to be reduced.
3. Drying process monitoring
Real time adjustmentPay close attention to the inlet/outlet temperature, air volume, and feed rate to ensure stability. Observe the trajectory of fog droplets and drying speed, and adjust the parameters in a timely manner.
Anti stick wall measuresActivate the automatic air brush device to prevent dry powder from adhering to the tower wall and affecting efficiency.
4. Discharge and Collection
Particle separationAfter drying, the particles are collected by a cyclone separator, and the exhaust gas is discharged through a wet dust collector.
Collection managementRegularly inspect the discharge container, replace it in a timely manner to prevent overflow, and ensure the integrity and purity of the particles.
5. Shutdown and Cleaning
Cooling stageAfter drying is completed, continue to run the fan to remove residual heat, gradually turn off the heater and power.
Cleaning and maintenanceClean the drying room, pipelines, and other parts using clean water or specialized cleaning solution to avoid residue affecting the next use.
3、 Key parameter setting and optimization
1. Inlet air temperature and air volume
temperature rangeAccording to the heat sensitivity setting of the extract, it is usually 150-180 ℃. Excessive temperature may cause component degradation, while insufficient temperature may result in insufficient drying.
Air volume regulationThe inlet air volume affects the drying speed. It is recommended to use 80% -100% of the rated air volume and optimize the matching feed amount through experiments.
2. Feed rate control
Viscosity adaptationThe feed rate of high viscosity paste needs to be reduced to prevent uneven atomization; Low viscosity materials can be appropriately improved to enhance efficiency.
dynamic adjustmentBased on feedback on the drying effect, if there is wall sticking or uneven drying, the rate needs to be recalibrated.
4、 Common Problems and Solutions
1. Particle wall sticking problem
reasonExcessive intake air temperature or uneven atomization can cause local overheating.
solveReduce temperature or optimize atomizer parameters to ensure even distribution of droplets.
2. Low drying efficiency
reasonExcessive feed rate or insufficient air flow can prolong the drying time.
solveAdjust the speed to a reasonable range and increase the air volume to improve heat exchange efficiency.
3. Abnormal operation of equipment
key inspection pointsRegularly verify the accuracy of the sensor, and immediately shut down for troubleshooting in case of abnormal temperature or pressure.
5、 Key points of maintenance and upkeep
1. Daily cleaning
Comprehensive cleaningClean the drying chamber and pipes after each use to prevent residue accumulation.
Disinfection ProcedureRegularly disinfect contact areas to ensure compliance with hygiene standards.
2. Regular inspections
Component inspectionCheck heating elements, seals, and electrical connections monthly to prevent malfunctions.
performance verificationEvaluate equipment status through particle quality testing, such as particle size distribution and moisture content.
3. Long term discontinuation treatment
protective measuresAfter cleaning, cover with dust-proof material and store in a dry environment to avoid corrosion.