Currently, the hag filters of the urea packing system in several large domestic chemical fertilizer plants still need improvement or reconstruction, and suggestions are offered on the future improvement on bag filters.

• 目前国内仍有不少大化肥企业的尿素包装系统的袋式除尘器需要进行改造或重建，为此对袋式除尘器今后的改造提出了建议。