关键词: 散粮, 水平直管, 旋流, 气力输送

Abstract:  In view of the complex interphase action of gassolid multiphase flow field, the lack of relevant flow field theory, spinning technology and equipment research, the characteristics of horizontal straight pipe cyclone pneumatic conveying of bulk grain were studied. In this paper, a vane rotor is designed to generate a swirl field. In order to maintain the swirl transport, a lateral air supply relay device is designed. A test platform was set up to study the characteristics of swirl pure flow field and twophase flow field with wheat particles as the test material. The results show that when the inlet wind speed is 15-20m/s, the system static pressure loss is the smallest and the precession distance is the longest. When the inlet wind speed is 20m/s, the particle distribution in the swirl tube is uniform, the static pressure standard deviation is minimum, and the transport process is more stable. When the main air velocity is 20m/s, the air velocity of the supplementary pipe is 60m/s, and the Angle between the main pipe and the auxiliary pipe is 45°, the flow field conveying effect is better and the system energy consumption is less. The reasonableness of the design of vane rotor and side aeration continuation device is verified.

Key words:  bulk grain, horizontal straight pipe, cyclonic flow, pneumatic conveying