High temperature and high speed Yankee hood direct fired natural gas combustion system

The standard Yankee dryer hot air hood is a well-known product in the market. The hot air hood of this type of drying cylinder generally adopts impact drying. The air flow temperature can be as high as 200 ℃, and the air flow speed is 50-160m / s. The mechanical design from the transverse nozzle box to the pressure ventilation system can vary as required. The hot air hood can be dried under the condition of high impact temperature, and it can be divided into three independent areas: high temperature toe area, mixing area and drying area. The temperature of these three areas can be adjusted according to the requirements of quality and output (but now domestic manufacturers generally do two areas, namely high temperature toe area and drying area, to save production costs, which is also based on domestic paper The locomotive speed is not high.

Yankee hood hot air Yankee hood is a kind of drying device which combines the contact drying and convection drying of paper sheets. It is 4-10 times higher than the drying capacity of ordinary drying cadres. High speed hot air Yankee hood is specially designed for high speed tissue paper machine or special paper machine. Based on the principle of contact drying and convection drying, the hot air with high temperature and high speed makes the hot air produce rapid convection heat transfer to the paper. At the same time, the hot air blows vertically to the paper, the air film on the interface is damaged or the thickness is reduced, so the coefficient of heat and mass transfer is greatly increased, the evaporation is strengthened, the output of the paper machine and the drying efficiency of the drying cylinder are greatly improved, and the steam consumption is low. Especially in the production of toilet paper, it can not be replaced. The loose thickness and softness of the paper have been significantly improved.