Question: Nozzle linear velocity issue

I have some materials on the CS series at the office. You can contact me at zhouqxhpc@petrochina.com.cn. We have always used the KH series; the linear velocity of the nozzle should not be too high – over 70 meters per second is considered too high. The optimal value is around 45 to 60 meters per second. If it’s too low, it also doesn’t work well, as a low difference in velocity between the steam and the material causes significant problems with the atomization process (atomization of the material relies on the difference in velocity between the two phases to pull the material into fine filaments that are then shattered into mist). Therefore, the pressure drop of the nozzle is also very important; a suitable pressure drop is necessary, otherwise it will affect the atomization effect (the pressure drop is usually around 0.3 to 0.4 MPa). Special attention must be paid to nozzles that operate at low line speeds and with low pressure drops.