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作为超高层烟囱的环境保护对策,日本大林组公司最近开发成功可防止烟囱产生气流下冲现象的装置,设置在丸住制纸公司大江工厂185米高的烟囱衬套顶部后,证明其效果显著。 该装置由烟囱顶部的可动式操作盘、操作盘的传动装置、自动控制盘、遥控盘组成。利用发动机气缸,通过滑环和导轨,来接通或断开安装在烟囱顶部的园形可动式操作盘,使烟囟的顶部面积根据外部风速的强弱发生变化。因在20％～100％的范围内,可自由控制顶部面积的开关比例,所以将排气的排放速度和外部风速的比率,经常保持在规定值之上,可防止气流下冲。 由于在烟囱顶部存在着称为下降通风的下降气
As a countermeasure for the protection of super high-rise chimneys, the Japanese company Daelim Group recently developed a device that can prevent underflow of the chimney, and was installed on the top of a 185-meter-high chimney liner of the Maruho Paper Manufacturing Co., Ltd. Dae plant. . The device consists of a movable operating panel at the top of the chimney, a transmission device of the operating panel, an automatic control panel and a remote control panel. The cylinder of the engine is used to switch on or off the garden-shaped movable operating panel installed on the top of the chimney through the slip ring and the guide rail, so that the top area of the soot varies according to the strength of the external wind speed. Since the ratio of the top area of the switch can be freely controlled within a range of 20% to 100%, the ratio of the discharge speed of the exhaust gas to the outside wind speed is always maintained at a predetermined value to prevent undershoot of the air flow. Due to the presence of a descending gas called descent ventilation at the top of the chimney