不同含水率污泥和小麦秸秆混合热解制备富氢合成气

为拓展活性污泥资源化利用方向,在固定床反应器中研究了不同含水率污泥与小麦秸秆的共热解。将不同含水率的污泥和秸秆在600~900 ℃范围内混合热解,研究了热解温度、污泥含水率和秸秆添加量对气体组成的影响。当污泥含水率一定时,随着反应器温度的升高,H₂和CO的含量逐渐增加。在相同温度下,随着污泥含水率的增加,H₂的含量呈现先增加后减少的趋势,而CO含量呈逐渐下降趋势。当污泥含水率为60%时,H₂的含量达到最大值。当热解温度为800 ℃时,制备富氢合成气的最佳比例为40%的秸秆与含水率为60%的污泥混合热解。

HYDROGEN-RICH SYNGAS PRODUCTION BY CO-PYROLYSIS OF WHEAT STALK AND WET SEWAGE SLUDGE WITH DIFFERENT MOISTURE CONTENT

In order to expand the utilization of activated sludge, the co-pyrolysis of sludge and wheat straw with different moisture content was studied in a fixed bed reactor. Sludge and straw with different moisture content were mixed and pyrolysis in the range of 600~900 ℃. The effects of pyrolysis temperature, sludge moisture content and straw addition amount on gas composition were studied. When the sludge moisture content was constant, the content of H₂ and CO gradually increased with the increase of reactor temperature. At the same temperature, as the moisture content of sludge increased, the content of H₂ increased first and then decreased, while the content of CO decreased gradually. When the moisture content of sludge was 60%, the content of H₂ reached the maximum value. When the pyrolysis temperature was 800 ℃, 40% straw and sludge with moisture content of 60% was the best proportion to prepare hydrogen-rich syngas.