Difficulties and countermeasures for incineration of low calorific value sludge
The sludge calorific value is the primary influencing factor for the sludge incineration process.However,under certain special circumstances,the sludge calorific value generated by the sewage treatment plant may reach a low level,which has a significant impact on the operation of the project.During the commissioning period of the centralized sludge disposal project in Yancheng City,the calorific value of sludge incinerated in a bubbling fluidized bed was at a low level.Through analyzing the existing problems,improvement measures such as strengthening fluidization air,adding slag coolers,adding burners on the upper part of the incinerator,and optimizing relevant processes of front-end wastewater treatment plant were taken.The project achieved stable opera-tion under low sludge calorific value and high treatment load,and the flue gas was steadily dis-charged up to standard.
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