ABSTRACT

In this study, the particle motion simulation and application exploration of three-stage cone water-only cyclone (TWOC) were performed. The discrete phase model was applied to simulate the particles motion during the separation process of TWOC. The particle distribution curve of light products of TWOC obtained by the simulation is well consistent with that of the validation experiment, demonstrating the credibility of the particles motion simulation. The separation characteristic of this cyclone was clarified. The cone part is the main separation region, and the axial separation position of particles is deepened with the growth of the particle density. The “T-F” flow, consisting of the TWOC separation and flotation, was designed to separate the coal-slime efficiently. The separation experiments indicate that the pyrite sulfur rejection rate and the ash rejection rate of the NO.1 experiment are all greater than 79.00%. The “C-T-F” flow, consisting of the crushing process and the “T-F” flow, was designed to improve the desulfuration performance of the high-sulfur lump-coal. The crushing size was determined as 3 mm, and the pyrite sulfur rejection rate of the “C-T-F” flow is greater than 90.00%. The superiorities of the two separation flows promote the practical application of TWOC.

摘要

本研究进行了三级锥式仅水旋流器（TWOC）的粒子运动模拟和应用探索。应用离散相模型模拟了TWOC分离过程中的颗粒运动。通过仿真得到的TWOC轻质产物的颗粒分布曲线与验证实验吻合良好，证明了颗粒运动模拟的可信性。澄清了该旋风分离器的分离特性。圆锥部分是主要的分离区域，并且随着颗粒密度的增加，颗粒的轴向分离位置加深。包括TWOC分离和浮选的“ TF”流旨在有效分离煤泥。分离实验表明，NO.1实验的黄铁矿除硫率和除灰率均大于79.00％。“ CTF”流由粉碎过程和“ TF”流组成，旨在提高高硫块煤的脱硫性能。压碎尺寸确定为3 mm，“ CTF”流的黄铁矿脱硫率大于90.00％。两种分离流程的优势促进了TWOC的实际应用。“ CTF”流的黄铁矿脱硫率大于90.00％。两种分离流程的优势促进了TWOC的实际应用。“ CTF”流的黄铁矿脱硫率大于90.00％。两种分离流程的优势促进了TWOC的实际应用。