LIANG Huiling,YIN Shizhong,YANG Yongfei,et al.The effect of hydrochloric acidification conditioning on calorific value of sludge[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2023,62(04):93-101.
LIANG Huiling,YIN Shizhong,YANG Yongfei,et al.The effect of hydrochloric acidification conditioning on calorific value of sludge[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2023,62(04):93-101. DOI: 10.13471/j.cnki.acta.snus.2022C018.
The effect of hydrochloric acidification conditioning on calorific value of sludge
Sludge incineration, as the best practical way to practice the principle of sludge volume reduction, which is currently widely used in coal-fired power plants and waste incineration plants. Since the inorganic content in the sludge is generally in the high level in recent years, it is necessary to add combustion materials to the sludge for incineration to effectively utilize the sludge resources. How to improve the unit content in the sludge has become an important issue in reducing the cost of sludge incineration. Studies have shown that the acid leaching treatment of sludge can release the metal elements in the sludge into the liquid phase. In this paper, the relationship between sludge acid treatment, organic matter content and sludge calorific value of sludge and inorganic elements of sludge caused by acid modification was investigated through gradient acid modification experiments of hydrochloric acid in the sludge of the sewage plant in Dongguan town, the sewage plant in Jiangmen and the sewage plant in Shanwei.The experimental results showed that the acid modification of the sludge increased the calorific value of the dry sludge of the three sewage plants by 4 106.7, 3 118.5 and 2 669.7 kJ/kg, respectively, and the proportion of the original sludge increased by 38.14%, 35.06% and 23.21%, respectively.
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