纳米锌粉水解高效旋流反应器转化率和颗粒停留时间研究

Conversion Rate and Residence Time in Nano-Zn Particles Hydrogen Cyclone Reactor

将高效旋流反应器应用于纳米锌粉水解制氢实验系统中,在反应器内化学反应与气固分离同时进行,节省分离所需设备投资.研究表明:旋流反应器内固体颗粒在气流的强旋转力作用下,形成三维两相湍流旋转流场,颗粒的随机运动提高了传热、传质速率;颗粒随着尺度的减小,反应速度加快,转化率提高;颗粒在反应器内的停留时间随着入口处气速雷诺数的增加而延长,当雷诺数过小,流体达不到湍流状态,停留时间明显减小.

A new experiment system and method about hydrogen production via nano-Zn hydrolyze in a cyclone reactor were introduced where the chemical reaction and gas-solid phase separation were accomplished at the same time, which enhances the reaction speed and saves the investment cost. Research indicates that gas-solid phase applied a powerful rotary force form three-dimensional, two-phase rotary flow field in the inner of cyclone reactor, and then the random movement of particles improves the rate of heat transfer and mass transfer, and the less particles size, the more reaction velocity and conversion rate of particles. The residence time of particles extended with the Reynolds number increasing of the entrance gas velocity within the reactor. When the Reynolds number is too small, fluid not reaching turbulent state, the residence time is significantly reduced.