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一、热射流接受式排风罩的特点是,污染气流的运动是生产过程本身造成的,接受罩只起接受作用,它的排风量取决于接受的污染空气量大小。生产过程诱导的污染气流主要是指热源上部的热射流和粒状物料高速运动时所诱导的空气量。由于后者的影响较为复杂,通常按经验公式确定。热源上部的热射流主要有两种形式,对于高温设备表面对流散热时形成的热射流,在热源(水平)
First, the heat jet receiving exhaust hood is characterized by the movement of polluting air flow caused by the production process itself, accept the cover only accept the role of its exhaust depends on the amount of air pollution received. The pollution air flow induced by the production process mainly refers to the amount of air induced by the heat jet and the granular material at the upper part of the heat source during high-speed movement. Due to the complexity of the latter, it is usually determined by empirical formulas. There are mainly two types of heat jets in the upper part of the heat source. For the heat jets formed on the surface of the high temperature equipment during convection and heat dissipation,