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针对PV型旋风分离器的涡壳式进口结构,从实验方面进行了改进探讨。由于受到PV型旋风分离器蜗壳进口水平底板的约束,底板上旋转气流中的颗粒灰带在入口处与入口气流相汇,灰带中的颗粒被卷吸进入升气管的短路流,导致颗粒的逃逸。为此提出将进口水平底板改成螺旋式斜底板,并进行了分离性能的对比实验和分析。实验结果表明,螺旋式斜底板进口结构避免了器壁上的旋转灰带与进口气流的交汇和碰撞,抑制了颗粒的逃逸,有助于提高旋风分离器的分离性能。
Aiming at the volute-type inlet structure of the PV type cyclone, the improvement is discussed from the experimental aspects. Due to the PV-type cyclone volute inlet horizontal floor constraints, the swirling air flow on the floor of the gray belt at the entrance with the inlet air exchange, the particles in the gray belt is entrained into the riser short-circuit flow, resulting in particles Escape. Therefore, it is proposed to change the imported horizontal floor into a spiral inclined floor, and the comparison experiment and analysis of the separation performance are carried out. The experimental results show that the inlet structure of the helical sloping floor avoids the intersection and collision between the rotating ash belt and the inlet air flow on the wall, restrains the particles from escaping and helps to improve the separation performance of the cyclone.