基于动态气封壁反应器的湿式氧化工艺

将动态气封壁反应器应用于湿式氧化，利用空气与亚临界水的界面张力将腐蚀性反应液局限在多孔壁以内实现“气封”，并在9.1~10.9 MPa、242~338℃的实验条件下得到了验证。对应的湿式氧化工艺在处理固含量2.9%的城市污泥和回收固含量1.6%~10.5%的污泥用活性炭的实验过程中，设备运行稳定，“防腐抗堵”性能良好。进一步分析表明，动态气封壁反应器能强化气液混合、降低设备投入和减少系统能耗，具有一定的开发潜力。但由于受限于反应器体积，过氧量和停留时间不足，导致处理效率偏低，需进一步优化改进。

Wet air oxidation process based on dynamic gas seal wall reactor

A dynamic gas seal wall reactor (DGSWR) was applied to wet air oxidation (WAO). The gas seal effect was achieved to contain a corrosive reaction mixture within a porous tube by taking advantage of the surface tension difference between air and subcritical water. The gas seal effect was successfully verified at 9.1 to 10.9 MPa and 242 to 338℃ by treating sewage sludge with 2.9% dry solid or spent activated carbon with 1.6% to 10.5% dry solid, respectively. Under WAO conditions, the DGSWR showed stable operation, and good anti-plugging and anti-corrosion performance. Further analysis showed that it possessed some other advantages over normal WAO systems, such as enhanced gas-liquid mixing, reduced reactor cost, and reduced energy consumption. However, both the TOC removal efficiency and activated carbon regeneration efficiency for DGSWR, were low because the reaction volume, stoichiometric oxygen excess, and residence time were low for the current reactor. The DGSWR should be further studied and improved.