流化床污泥干化器循环系统产生可燃气体和粉尘原因分析与防治对策

污泥干化焚烧是大中城市污泥处理处置中的一个重要环节。该文以石洞口污水处理厂污泥干化焚烧为例,脱水污泥在循环风作用下高速流化,污泥中大量水分被循环风带走同时势必产生大量的粉尘和可燃性气体,如何控制粉尘和可燃气体在爆炸极限范围内,防止事故的发生是工艺技术人员需要解决的问题。石洞口污水处理厂在污泥干化焚烧方面做了工艺方面改进,将粉尘浓度太大和可燃气体超出极限可能引起的安全问题控制在有效范围之内,保证了工艺设备安全运行,成功地解决了严重制约流化床污泥工艺存在的安全问题,有助于国内类似设备在运行中借鉴。

Cause Analysis and Preventive Countermeasure on Combustible Gas and Dust Produced form Circulating System of Fluidized Bed Sludge Dryer

Sludge drying incineration is an important link in the sludge treatment of?large and medium-sized cities.Taking the sludge drying incineration of Shidongkou WWTP as an example,the dewatered sludge is fluidized at high speed in the circulating air,meanwhile,a lot of water in sludge is taken away by the circulating air,and at the same time certainly a large number of dust and combustible gas are produced.It is required to solve the problems for the technological technicians how to control the dust and combustible gas within the explosion limit and how to prevent the accidents.The technology of sludge drying incineration in Shidongkou WWTP has been improved to control the safety problem possibly caused by too large concentration of dust and the combustible gas exceeding the ultimate limit within the efficient range in order to guarantee the safe operation of technological equipment and successfully to solve the safety problem seriously restricting the fluidized bed sludge technology,which can be referred for the operation of the local similar equipment.