不好意思,有点长,翻译不透,请大家看着改。? 由于附着在滤袋表面的粉尘会堵塞滤袋的气流通道,造成设备的压降增大,故需对滤袋进行反向喷吹清洗;该设备采用时序 控制器 控制 电磁脉冲阀 轮流开启对滤袋进行在线自动脉冲清灰, 氮气 作为清洗气体。开始反吹时,第一个阀接收到时序控制器发出的信号,在 30ms 内完全开启,持续 50 ~ 300ms (可调),气包内的高压气流瞬间由阀、反吹管、喷嘴喷出,形成一股引射气流,这股气流在喷嘴喷出的瞬间,会在喷嘴周围形成瞬间负压状态,周围的气体则迅速补充,并随着这股引射气流进入滤袋,形成体积数倍于引射气流的诱导气流;而高压引射气流在由喷嘴喷出时,由于压力释放,体积相应增大(根据公式 PV=C 、 C 为常数);引射气流及诱导气流在进入滤袋后会造成滤袋的急剧膨胀,并由于气流瞬间喷出时形成的震荡,使得滤袋表面堆积的粉料脱落,掉入脱气仓,完成该阀对应的某一排滤袋的反吹清灰,该阀关闭。间隔 30 ~ 120s (可调)后,开启下一个阀进行反吹清灰。反吹清灰时,只是其中某一排滤袋在进行,而其余滤袋则继续工作。 Because the attached dusts will block gas stream and increase pressure drop, so the filter bag shall be deal with blow back cleaning. The filter is controlled by sequential timer, alternate starts solenoid pulse valve to complete filter automatic on-line pulse cleaning; Nitrogen will be used for back wash gas. When filter blow back, the first valve will be start within 30ms after receiving signal from sequential timer, duration is 50 ~ 300ms (adjustable); the high pressure gas in air tank will be spurt out from valve, blow back pipe and nozzle in moment, to form a eject gas stream. When gas stream spurt out from the nozzle, it will form short time negative pressure around the nozzle, and ambient atmosphere will makeup rapidly, then flow into filter bag along with the eject gas stream, so as to form induce gas stream, which is several times of eject gas stream volume. When high pressure eject gas spurt out from the nozzle, due to pressure relief, the volume will be increased (according to formula: PV=C, where C is constant); The eject gas and induce gas will cause filter bag rapidly expansion after flowing into filter bag, and due to vibration caused by gas spurting, the dust assembled on bag surface will be shake down to filter bin, so as to complete blow back cleaning of corresponding rows of filter bags, then the valve closed. After 30~120s (adjustable) duration, start the next valve to blow back. The blow back cleaning is only applicable for one row of filter bags, and other filter bags are still on working. 查看更多3个回答 . 1人已关注