在今年的朝阳区秋冬季扬尘专项治理行动中,两辆“雾炮车”在使馆区、奥运功能区等区域35条街道作业,降低空气中的污染颗粒物和尘埃。
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Known as the multi-purpose anti-dust truck, two are now being used in Beijing's Chaoyang, a district home to foreign embassies and Olympic facilities.
这两辆车名为多功能抑尘车,目前在外国使馆和奥运场馆集中的朝阳区作业。
Whenever the density of PM2.5 increases to 75 micrograms per cubic meter or above, the two vehicles will start to patrol 35 streets in the district.
当PM2.5浓度达到75微克每立方米及以上时,这两辆车就会在该区的35条街道作业。
这种“雾炮车”(mist cannon truck),也叫多功能抑尘车(multi-purpose anti-dust truck/multi-purpose dust suppression truck),可以喷射120米远、60米高的水雾。雾炮车通过高压将水雾化成微米级的水雾颗粒,与粉尘颗粒物大小相当,不仅可以省水,还能与城市中的雾霾碰撞、吸附,凝结成粉尘团并沉降。
此外,朝阳区重点区域降尘还应用了一项新专利——道路抑尘剂(pollution-free dust suppressant)。道路抑尘剂通过洒水车喷洒到路面,可以固化吸附汽车尾气排放的污染物颗粒,使其不易再产生扬尘,可以将道路环境中PM10降低20%,PM2.5降低5%,氮氧化物降低10%。
上个月,由荷兰设计师设计的雾霾净化塔(Smog Free Tower)在北京望京某地进行调试和测试。这个净化塔其实就是一个特大型号的空气净化器,使用小量的绿色能源(green energy)和专利的无臭氧离子技术,每小时能够净化3万立方米的空气。
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