Analysis of flow wear characteristics of particle Material around the heat exchanger

Gao Zhaoqiang, Liu Yongqi, Sun Peng

heat exchanger, discrete element method, wear flow characteristics

In order to study the particle flow characteristics in heat exchanger, the numerical calculation model of heat exchanger was established by discrete element method, the particle flow process in heat exchanger was simulated, and the wear position and strength of particles in heat exchanger were analyzed. Shear layer position and critical blocking state of the bypass heat exchanger and its influencing factors. The flow characteristics analysis results show that the tube bundle has obvious influence on the particle flow, and the particle flow uniformity between the heat exchanges is good; the flow area is 3 to 5 times the particle size on both sides of the tube bundle, and the heat exchanger spacing should be 1.5 ~ 2.0 times of pipe diameter, the wear particle flow wears less on the heat exchanger; as the ratio of the heat exchanger spacing value to the pipe diameter increases, the wear position is gradually reduced from -45° to 45° to -20° to 20°, and wear The intensity is gradually weakened and the flow uniformity is greatly improved.