T tube is a key component connecting the plug screw feeder and the cooking tube. It is mainly used for the mixing and pressure balance of the material and the cooking liquid. Its specific functions are as follows:
1. Material and liquid mixing
● Inject the cooking liquid (such as NaOH, Na 2O S) into the vertical section of the T-shaped tube, and fully mix with the material through turbulence to ensure uniform reaction. ● Example: In KP pulping, the T tube mixes the wood chips with the liquid and then sends them to the cooking tube to improve the delignification efficiency. 2. Pressure buffering and balance
● The T tube relieves the pressure fluctuation during the material transportation process through its structural design, ensuring the stability of the system pressure.
● Example: When the plug screw feeder pushes the material, the T-shaped tube can absorb part of the pressure shock and prevent the sudden change of pressure in the cooking tube. 3. Prevent return and blockage
● The special structure of the T-shaped tube can prevent the reverse flow of the material or chemical solutions, while reducing the risk of fiber entanglement or impurity deposition.
● Example: In the straw pulp cooking, the design of the T-shaped tube avoids the blockage caused by fiber accumulation.
4. Temperature and flow monitoring
● The T-shaped tube is usually equipped with temperature and pressure sensors to monitor the material status in real time, providing data support for system regulation.
● Example: The speed of the screw feeder or the amount of liquid medicine injection can be dynamically adjusted through the feedback data of the T-shaped tube sensor.
