污泥干化焚烧系统的节能降耗研究

以某污泥干化焚烧处理工程为研究对象,分别建立污泥干化系统、焚烧及余热利用系统和烟气处理系统的能量平衡模型。基于实际运行数据和现场测定数据,确定了运行期间污泥干化焚烧系统中主要的能量损失点,包括干化载气洗涤水热损失、干化机散热损失、焚烧炉及余热利用系统散热损失、烟气洗涤水热损失等。针对系统主要的能量损失点,提出了针对全过程的节能降耗方案。即,首先通过运行参数调节来提高干化机和焚烧及余热利用系统效率从而减少散热损失,再通过余热利用干化载气以及洗涤塔前烟气,从而减少载气洗涤排污热损失和烟气洗涤水热损失。

Research on Energy Saving and Consumption Reduction of Sludge Drying and Incineration System

Energy balance models of sludge drying system,incineration and waste heat utilization system and flue gas treatment system were established based on a sludge drying and incineration project.According to the operation data and on-site analytic data,the main energy loss points in the system were determined including the heat loss of the carrier gas washing water of drying system,the heat loss of the drying machine due to radiation,the heat loss of the incinerator and the waste heat utilization system due to radiation,and the sensible heat loss of the washing water of flue gas.According to these main energy loss points,this paper proposed an energy saving and consumption reducing scheme for the whole process.Firstly,the operating parameters are adjusted to improve the efficiency of drying machine,incineration and waste heat utilization system to reduce the heat loss.Then,through the usage of waste heat,drying carrier gas and flue gas in front of scrubbing tower,the heat loss of carrier gas washing sewage and the flue gas washing water can be reduced.