Generally speaking, the closed hood is the closed hood of the paper machine, which is used in the drying section and sizing section of the paper machine. It is a closed, bungalow-style, aluminum alloy hood, and its function is to recycle the steam generated by the paper machine, so as to facilitate better drying and energy saving of the paper machine. However, the modern closed air hood for papermaking has increased the functions of air supply and paper stabilization, so that it can balance the moisture, stabilize the paper and play a better drying role. Therefore, the closed gas hood has become an indispensable part of paper-making equipment.
The use value of the closed air hood in the drying section in the ventilation system of paper machine is very high, and it is a very important closed air hood in paper making equipment.
Functional requirements
1. Provide a closed high-temperature environment, which is convenient for drying paper, and reduce the air exhaust, so as to improve the effect of air exhaust heat recovery. The most popular in the world is that the dry bulb temperature in the gas hood is between 80~85℃, while the dew point temperature is between 58~62℃.
2. The appearance of closed gas hood is to monitor, operate and maintain the operation of paper machine, and it must be able to draw paper and change silver quickly and conveniently.
3. The enclosed gas hood is a high temperature and high humidity environment, which is prone to condensation, and its design must also completely eliminate condensation and dripping on the top plate of the gas hood.
4. As far as possible, the gas in the closed gas hood will not be distributed to the workshop.
5. The closed air hood should be able to adjust the air exhaust in the longitudinal direction of the paper machine, so as to meet the air exhaust required by each part of the paper web.
6. The closed gas hood shall have sufficient safety facilities such as lighting and fire fighting to meet the requirements of all aspects in the parts.
7. The enclosed gas hood occupies a relatively large area in the papermaking workshop, so the appearance of the gas hood must be beautiful and durable.
Therefore, in the process of manufacturing Shandong closed gas hood, we should strictly abide by the above requirements to ensure that the products we finally get are of high quality. Of course, we can also choose the appropriate closed gas hood according to our own needs.
Shandong Fengxin Technology Development Co., Ltd. is a company specializing in the development, research and production of paper ventilation, drying, energy saving technology and equipment, and has achieved good results in the field of paper ventilation, drying and energy saving for many years. Fengxin closed air hood system design mainly includes the drying part closed air hood, air hood in various functions of the blower, waste heat recovery device, paper machine mesh moisture, high-speed Yanke hot air hood, all kinds of coating drying boxes, workshop ventilation system and supporting equipment.