The peristaltic pump is mainly used in the spray drying granulator to accurately measure and transport the liquid slurry of Chinese and Western medicines and the adhesive coupling agent required for granulation.
Spray drying granulator, also known as one-step drying granulator and fluidized bed granulator, this fluidized bed granulation equipment is commonly used in the preparation of various granule instant materials, with top spray, bottom spray, side spray The difference is that the purpose of spraying is to form particles, some are to uniformly coat the particles, and some are used to achieve liquid evaporation to collect solid particles through the purpose of spraying. The specific drying heat source of these granulators can serve the purpose of evaporating water, but the evaporation of water and the formation of particles are in a dynamic relationship, so the amount of liquid and water to be injected must be very accurate to ensure a certain humidity of particles Conducive to the perfect formation of particles.
Early spray drying equipment usually used gear pumps and AC motors equipped with variable frequency speed regulators to achieve liquid supply and flow regulation. However, the gear pump encountered the following problems in the application process:
1. The structure of the gear pump determines that the liquid is likely to remain in the pump, which is not suitable for the clean requirements of production.
2. Gear pump gears are more prone to wear and need to be replaced periodically.
3. The overall cost of inverters and gear pumps is relatively high.
4. The fine adjustment of the flow rate of the gear pump is poor.
The advantages of peristaltic pump:
Pelletizer manufacturers later applied peristaltic pumps to solve the above problems. Since the liquid delivered by the peristaltic pump constant flow pump only contacts the hose, the cleanliness level is very high. There are no other wearing parts except the peristaltic pump hose, only need to replace the short section of the hose on the pump head of the peristaltic pump can be used continuously for more than 500 hours, and the replacement only takes less than 1 minute. carry out.
The accuracy of the liquid adjustment by the peristaltic pump is very high, which can reach 0.5-1%, which is very conducive to the constant delivery of liquid during granulation and coating. After a long period of trial and comparison, the peristaltic pump products have met customer needs in many aspects, such as appearance, accuracy and durability test. Now almost all granulator manufacturers and end users are gradually replacing gear pumps and adopting more reliable and cleaner peristaltic pumps.
