Boiling dryer is a common drying equipment, widely used in traditional Chinese medicine, food and other fields.However, in actual operation, some customers have reported that the boiling dryer has a large loss of heat energy and high difficulty in dust removal, and the automatic temperature control system of the boiling dryer is controlled by the original instrument and relay. The system has a large difference in the upper and lower limit of the equipment’s heating temperature in the process of use, which is not conducive to production and other problems.
So, how should solve this kind of problem, ensure the equipment energy saving, stable operation, to achieve greater benefits?
Improve Thermal Energy Utilization Rate
As an air convection drying equipment, the Boiling dryer has a high thermal energy utilization efficiency, but it still has problems such as high energy consumption and poor sealing. In order to improve the thermal energy utilization rate, industry experts recommend taking the following measures:
- Strengthen the sealing of the equipment: The hopper of the traditional Boiling dryer is connected to the equipment body with a flat flange, which has poor sealing. By switching to a concave and convex flange connection, the sealing between the hopper and the equipment body can be effectively improved, and the heat loss can be reduced.
- Increase the insulation layer: Adding an insulation layer to the heat exchanger shell and increasing the thickness of the insulation layer can help effectively reduce the leakage of heat energy and improve the overall thermal energy utilization efficiency.
Improve The Dust Collection Device
The boiling dryer uses the reciprocating motion of the cylinder to shake the collection bag, thereby achieving the effect of dust removal. In order to improve the dust removal efficiency and the service life of the equipment, it is recommended to make the following improvements:
The cloth bag uses anti-static and fiber-free cloth, the dust bag adopts an integral hoisting form, the filter bag connection adopts a clamp connection, and the sling uses a rigid material that is not easily deformed, which can effectively extend the service life of the dust collection device and reduce maintenance.
Improve The Control System
The operating parameters of the boiling dryer are mainly set by the operator’s experience, but it can be fully intelligentized, and the process parameters can also be traced, which puts high demands on the electrical control system of the equipment.
In the electrical control system, a series of devices such as temperature, pressure, pressure difference, and operation time are required to obtain basic data, which are transmitted and stored in the touch screen through the transmitter. The touch screen stores and analyzes the data, and then formulates a suitable process route to achieve intelligent control.
Achieve Precise Temperature Control
The traditional hot air heating control of the boiling dryer usually adopts a simple “switch” mode. This control method will cause large temperature fluctuations and affect the drying effect.
In order to ensure the stability of temperature, the temperature signal can be transformed and processed by PLC to control the opening and closing of the steam valve to achieve closed-loop temperature control. When heating starts, the steam flow is large, which quickly brings the inlet air temperature close to the set value, and then automatically adjusts the steam flow to maintain a stable temperature and reduce the impact of fluctuations on drying quality.
Conclusion
In summary, based on the understanding of the working principle of the boiling dryer, by partially improving the dust collection device, temperature and air inlet filter device, it can better meet the production requirements and bring better production efficiency to the enterprise.
