污泥热解工艺参数对残渣吸附性能的影响

目的]优化污泥热解工艺条件及增强污泥热解残渣对小分子的吸附性能。方法]设置不同的温度、保温时间及含水率条件,对污泥进行热解,测定不同条件下得到的热解残渣的失重率、热值、碘吸附值、亚甲基蓝吸附值等指标。结果]污泥中有机质发生热解反应的主要温度为350～550℃;温度越高,热解剩余残渣率和残渣热值越低,污泥热解越充分;在450℃时,污泥热解残渣的吸附性能最好。当保温时间延长到60 min以后,对热解结果的影响不大,从节能的角度考虑,保温时间应设定为60 min。当含水率增加到50%以后,对热解结果的影响不大,从节能的角度考虑,应将污泥含水率控制在50%之内。结论]该研究为污泥无害化与资源化处理提供了参考依据。

Effects of Sludge Pyrolysis Parameters on Residue Adsorption Performance

Objective] To optimize pyrolysis techniques and strengthen small molecule adsorption performance by sludge pyrolysis residue. Method] Setting different temperature, holding time and moisture content, the sludge was pyrolyzed. The weight loss rate, calorific value, i- odine adsorption value and methylene blue adsorption value of the pyrolysis residue which is obtained under different conditions were deter- mined. Result] The organic matter in the sludge is pyrolysised in the temperature range from 350 to 550 ~C ; The higher the temperature, the lower the remaining residue rate and the calorific value of the pyrolysis residue, and the sludge is pyrolyzed more completely ; At the pyrolysis temperature of 450 ~C, the adsorption properties of the pyrolysis residue is preferably ; When the holding time is extended to 60 min, the effect on the results of the pyrolysis is limited, so considering from the perspective of energy saving, the holding time should be set to 60 minutes; When the moisture content is extended to 50%, the effect on the results of the pyrolysis is limited, so from the perspective of thermal energy, the moisture content of the sludge should be controlled within 50%. Conclusion] The study provides reference basis for sludge harmless and resource treatment.