Study On Performance For Curved Plate Dehydration Equipment

In this paper, the self-designed curved plate dehydration equipment is systematically studied.The flow field in curved plate dehydration equipment is analyzed theoretically. Since there are three different fluid states in Curved plate dehydration equipment, including droplets, airflow and film on the wall of curved plate, the two-phase and three-flow field which exist in the curved plate dehydration equipment are proposed. The two-phase includes gas and liquid phase, and the three-flow field includes the flow field of airflow, droplets and film. Using the principles and knowledge of hydromechanics, the motion and forces of droplets in the curved plate dehydration equipment is analyzed, and the exchange of momentum and energy among three flow fields is studied. Through reasonable hypothesis, complex gas-water separation process is simplified and the numerical model of three flow field is obtained.In order to understand the performance of the curved plate dehydration equipment, an industrial wet ESP is used as the test platform, and a new type of mechanical water content measuring device is adopted. The influence law of the performance of the curved plate dehydration equipment is caused by blade spacing, velocity and average particle size through single factor experiment. When the blade spacing increases, the mechanical water content increases, however, dehydration efficiency and resistance loss gradually decrease. When the velocity increases, the mechanical water content decreases, however, resistance loss and dehydration efficiency increase. When the particle size decreases, the mechanical water content increases, however, dehydration efficiency decreases and resistance loss isn't significantly changed. On this basis, through the three factors and three levels orthogonal experiment, the factors of the curved plate dehydration equipment are analyzed, then primary and secondary order of various factors is obtained. The best combination of parameters is identified based on the performance of the curved plate dehydration equipment by means of test analysis: curved plate spacing is 17.5 mm, wind speed is 3.6 m / s and pressure is 0.3 MPa. Mechanical water content in the curved plate dehydration equipment is 4.3 mg/m3. The results fully satisfy the requirements of CCPP unit.