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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