活化污泥基黏结剂制备型煤型焦试验研究

为实现粉煤的综合利用,以城市污泥为黏结剂的基础组分,采用化学方法活化,利用粉煤成型技术制备型煤,对工艺条件进行研究,考查了成型压力、污泥含量、干燥时间对型煤冷压强度和湿压强度的影响,确定了最佳工艺条件。结果表明,污泥含量为12%、成型压力12 MPa、干燥时间8 h时,制得型煤的冷压强度为1 522.5 N,落下强度为97.7%,型煤600℃干馏2 h制得型焦的强度、灰分、挥发分、发热量等主要指标均达到《陕西省地方洁净型煤技术标准》。利用活化污泥可制备出适用于工业生产的洁净型煤。

Experimental study of briquette and formed coke preparation using activating sludge as binder

In order to achieve comprehensive utilization of pulverized coal,municipal sludge was chosen as a base component of binder,and chemical activation was used.The influence of forming pressure,sludge content and drying time on cold press strength and wet compressing strength was studied.The optimum process conditions were determined.The results showed that the cold press strength,dropping strength of briquette was 1 522.5 N,97.7％ respectively,when the sludge content was 12％,forming pressure was 12 MPa,drying time was 8 h.Under the optimal condition,briquette was calcinated in 600 ℃,then properties of formed coke was tested which met the requirements of The Standard of Shaanxi Local Clean Briquette Technology,such as ash,strength content,volatile,calorific value.The clean briquette bonded by modified activated sludge was suitable for industrial production.