Abstract: For waste treatment at the township level, small-scale waste incineration systems are seen as a cost-effective and practical method. To address this, a semi-dry deacidification system was designed specifically for small-scale waste incineration treatments to evaluate its efficacy in removing acid gases. The test results show that optimizing the injection mode of the absorption agent and improving mixing uniformity can significantly enhance absorption efficiency. For instance, with an equivalent ratio of sodium bicarbonate at 1.3, the removal efficiency of SO₂ reaches approximately 80%, striking a balance between economic feasibility and desulfurization requirements. Furthermore, the study explored the impacts of various absorbents, reaction temperatures, residence times, and leachate on deacidification efficiency. These parameters provided experimental data and field application basis for practical engineering applications.