Working principle

Firstly, open the vent valve of the closed-loop system, fill the system with nitrogen gas, replace the air in the system to the predetermined level, close the vent valve, turn on the fan, heat the nitrogen gas, and turn on the refrigerant to make the entire system in a normal feeding state. Start feeding and control the residence time. At this time, the evaporated solvent enters the condenser and is condensed into a liquid state and enters the recovery tank. Non condensable nitrogen gas enters the fan again, and after heating, enters the dryer for the next cycle; Strictly control the balance of feed and discharge volume, control the temperature and system pressure at each point. Once the oxygen content in the system exceeds the standard, nitrogen will be automatically replenished, and the pressure relief valve will automatically open with an alarm device. The PLC program will automatically control and debug all parameters to the normal range, and carry out ash cleaning at regular intervals. This cycle achieves continuous production, achieving the purpose of drying materials and recovering solvents. Due to the flammable and explosive nature of the solvents, the entire system is explosion-proof and equipped with a vent and explosion-proof membrane to ensure the safety of the device and the personal safety of the operators.

Characteristics and advantages of the crew：

1. The system is fully enclosed, using nitrogen as the heat transfer medium for cyclic use, especially suitable for drying easily oxidizable, flammable, combustible, and explosive materials;

2. Due to its closed-loop circulation, continuous drying, and minimal exhaust emissions, the production environment has been greatly improved;

3. Low boiling point solvent recovery has a wide range of applications. Common solvents such as benzene, toluene, methanol, ethanol, acetone, cyclohexane, n-heptane, chloroform, DMF, etc. can be effectively recovered with a recovery rate of 90% -98%, saving resources, protecting the environment, and reducing production costs.

4. Boiling drying has achieved continuity, increased yield, improved efficiency, reduced energy consumption, and alleviated recognized labor intensity;

5. The cylinder vibration drives nitrogen pulse cleaning, which ensures both pressure balance and cleaning effect of the system;

6. Online detection of moisture, oxygen content, pressure, and temperature at various points to ensure that the entire production is carried out within an effective monitoring range;

7. Adopting advanced condensation and cooling technologies, using composite plates instead of fins, and collecting solvents with maze type liquid collection plates, the condensation and cooling effects have been improved, and the solvent recovery rate has been increased;

8. Intelligent control is adopted to improve the automation of the device and ensure the safety, progressiveness and scientificity of the device;

9. Choose carbon fiber filter bags that are resistant to oil, water, adhesion, and static electricity, use PTFE film coating, and apply three needle sewing technology to ensure that the filter bags do not leak;

10. The fluidized bed adopts an alternating combination of inclined and straight holes, and laser drilling is used to ensure that the bed plate is flat, the holes are free of burrs, and the plate is not deformed; The large bed is equipped with an adjustable weir plate.

SCHEMATIC DIAGRAM