自20世紀50~60年代老化房在發明和開始推廣起，老化房冷卻除塵就大量使用一種碗形噴嘴，目前還在廣泛應用。有些鋼廠也采用反濺式和三線內螺旋型噴嘴。碗形噴嘴的最主要問題是易堵塞，比如某廠一文所用的碗形噴嘴，剛用時噴水量為80#90t/h，使用約一周后噴水量就只有40#50t/h。噴嘴堵塞后自然冷卻能力不足；另外噴嘴體積大，產生的阻力也大。
Since the invention and popularization of aging rooms in the 1950s and 1960s, a bowl-shaped nozzle has been widely used in cooling and dust removal of aging rooms. Some steel mills also use anti-splash and three-wire internal spiral nozzles. The main problem of bowl nozzle is easy to plug. For example, the bowl nozzle used in a factory is 80 The natural cooling capacity is insufficient after the nozzle is blocked. In addition, the volume of the nozzle is large and the resistance is large.
國外發達國家的一些鋼廠老化房采用干法電除塵。在干法電除塵中，對噴嘴的霧化冷卻效果要求就更加嚴格，因為煙氣溫度低于露點溫度，粉塵會粘結到電極板上，不僅增加工作量，而且會使電除塵起不到除塵作用；煙氣溫度過高則粉塵的比電阻過高，電除塵系統也會形同虛設。采用布袋干式除塵也有類似的問題。
Dry electrostatic precipitation is used in aging rooms of some steel plants in developed countries. In dry electrostatic precipitation, the requirement for atomization cooling effect of nozzle is more stringent, because the temperature of flue gas is lower than dew point temperature, dust will adhere to the electrode plate, not only increase workload, but also make electrostatic precipitation can not play a role in dust removal; if the temperature of flue gas is too high, the specific resistance of dust is too high, and the electrostatic precipitation system will also be virtual. There are similar problems with bag dry dust removal.
