Dense-phase conveying control method and system

The invention discloses a dense-phase conveying control method and system, relates to the technical field of pneumatic conveying, and solves the problems that switching continuity among conveying systems and material conveying stability are affected easily due to manual control for a parallel conveying mode, the safety is poorer and the efficiency is lower. According to the dense-phase conveying control method, a material detection device and a pressure detection device acquire the material level height values and pressure values of bins and lock hoppers of the conveying systems in real time respectively, and feed the material level height values and the pressure values back to a control device; the control device compares the material level height values and the pressure values with preset high and low material level threshold values and pressure threshold values respectively, and controls opening and closing of valves according to comparison results; and the control device controls a vacuum bin to convey materials automatically to a reaction device alternately through the conveying systems according to the material level height values and the pressure values of the conveying systems. The dense-phase conveying control method and system are mainly applied to a material conveying process.