The function of the hood in the drying section of the paper machine

The performance of the dryer ventilation system has seriously affected the paper machine operation efficiency, production energy consumption and product quality. With the increasing speed of the paper machine, the air distribution in the hood of the drying section is more and more complex, and it is more and more difficult to deal with the air inflow. As the key equipment of air distribution and air treatment, the closed hood is of high value in the ventilation system of paper machine, and plays an important role in the operation of paper machine. Today, I'd like to talk about the role of Yankee hood manufacturers in the drying section of the paper machine to help you better judge.

1. The primary function of the hood is to capture and remove moisture from the drying section

Yankee hood and hood exhaust fan are the main equipment to complete this task. The drying section of the high-yield paper machine will evaporate tons of moisture per minute. And the hood and the air extraction system can concentrate the water and air in the drying section, recover the heat and discharge it out of the plant. Make the drying capacity and paper machine output ideal.

2. Provide controllable drying environment and optimize the ventilation performance of pocket area

The ventilation system in the pocket area can be operated in coordination with the hood to control the drying environment, and the humidity in the pocket area can be controlled to a very low and uniform level. Improve the drying ability of paper machine and reduce the fluctuation of moisture distribution in the cross direction.

3. Adjust the air distribution inside the hood, stabilize the paper web, and improve the efficiency and speed of the paper machine

The stable operation of the web in the drying section is an important condition for high efficiency and high speed of the paper machine. In order to make the sheet run stably, the paper stabilizer and the hood should be operated coordinately and the air flow in the hood should be handled properly.

4. Improve thermal efficiency

Hood and ventilation system can greatly recover heat and have high quality "recovery energy". The heat of most steam dried paper is extracted from the hood by the hood and hood exhaust fan, and then enters the heat recovery system for heat recovery and reuse.

We can see from it that the closed hood plays a great role in the ventilation system of the drying section. It can not only help the equipment to operate better, but also save energy, and reduce a lot of unnecessary expenses for the enterprise.