Boiling dryer is a common drying equipment. It is widely used in traditional Chinese medicine, food and other fields. However, in actual operation, some customers report that the boiling heat loss of the boiling dryer is large, the dust removal is difficult, and the temperature of the boiling dryer is automatically controlled. The system is controlled by the original instrument and relay. The upper limit of the heating temperature of the system during use, the difference between the lower limits is large, which is not conducive to production and other problems. So, how to solve such problems, ensure energy saving and stable operation of the equipment, To achieve greater benefits?
Improve heat energy utilization
Formally speaking, the boiling dryer is an air convection drying equipment, but there are still problems such as high energy consumption and insufficient equipment sealing.
According to the industry, the following measures can be taken to achieve good energy-saving effect: Strengthen the sealing effect of the equipment. The original hopper of the boiling dryer is connected with the unit body by a flat flange, and the sealing effect is poor. Better to increase the sealing of the hopper and the equipment body; increase the insulation layer, add insulation layer to the outer shell of the heat exchanger, and increase the thickness of the insulation layer to greatly reduce the heat loss.
Improved trapping dust removal device
The boiling dryer achieves the dust removal effect by the reciprocating motion of the cylinder to achieve the dust removal effect. The bag is made of anti-static, non-fiber off-cloth, and the collecting bag is in the form of integral lifting. The filter bag is connected by clamp connection. The hanging ribs are made of rigid materials that are not easily deformed, which effectively prolongs the life of the dust collector and reduces maintenance.
Improved control system
The operating parameters of the boiling dryer are mainly set by the operator's experience, but they can be fully intelligent and traceable to the process parameters. This puts high demands on the electrical control system of the equipment. In the electrical control system In the process, a series of devices such as temperature, pressure, differential pressure, and operation time are required to obtain basic data, which are transported and stored in the touch screen through the transmitter, and the data is stored and analyzed by the touch screen, and then a suitable process route is prepared. Intelligent control can be achieved.
Temperature control
As we all know, the hot air heating control mode adopts a simple 'on', 'off' mode, and stops the steam when the temperature reaches the set value, but the heat exchanger still has residual heat to keep the air temperature rising, and vice versa, which will cause the temperature. The fluctuation is too large, affecting the dry quality of the equipment.
The industry recommends that the temperature signal can be changed and processed by PLC, the steam valve can be controlled to open and close, the temperature closed-loop control can be realized, and the self-control purpose can be achieved. The size of the steam flow valve can be controlled to maintain the inlet air temperature. The flow rate is large, so that the inlet air temperature is close to the set value as soon as possible, and then the steam quantity is automatically adjusted to slowly approach the set value, and the steady steam quantity is maintained to keep the inlet air temperature stable.
In summary, before improving the equipment of boiling dryers, it is necessary to understand the working principle of such equipment, and then combine these principles with the technical problems in the production process to improve the equipment to meet the user requirements. Part of the improvement of the dust collector, temperature and air inlet filter device can better meet the production requirements and bring better production benefits for the production.
