基于前期实验结果，利用过程模拟软件搭建湿式氧化的基础模型，为方案设计提供参考。选取污泥含水率、热值和进气含氧量为变化因素，对自热条件下反应器可回收热量和系统压力进行模拟计算。结果表明，进气为纯氧时，实验压力下，维持自热的含水率最高为87.6%；当考虑污泥泵的实际能力时，含水率最高可为89.1%；干基热值范围在11~16 MJ/kg的污泥适用于此基础模型；随氧浓度增大，系统所需压力减小。针对某污水厂的污泥，对20 t/d污泥湿式氧化处理方案和对应的综合模型进行了介绍，并验证了模型的可用性。模拟结果与实验对比，发现气相产物无SO₂、NO_x；能量分析表明系统可自热维持。经济性分析结果表明，20 t/d系统的总投资约918万元，运行成本约134.8元/t。

Based on the results of previous experiments,the basic model of wet oxidation is built by means of process simulation software,which provides a reference for the design of the scheme.The moisture content of sludge,calorific value and oxygen content of intake are selected as variable factors,and the recoverable heat and system pressure of the reactor are simulated under self-heating maintenance conditions.The results show that maximum moisture content to remain self-heating is 87.6% under experimental pressure when the intake is pure oxygen.When considering the actual capacity of sludge pump,the moisture content can be up to 89.1%.The sludge with a dry-based calorific value between 11 and 16 MJ·kg^-1 are suitable for this system.As oxygen concentration increases,the pressure required by the system decreases.In view of sludge in a certain sewage plant,the wet oxidation treatment scheme and corresponding comprehensive model for 20 t·d^-1 sludge are introduced,and the usability of the model is verified.Compared with the experiment results,it is found that there is no SOx and NOx in gas products either.Energy analysis shows that the system can be maintained by self-heating.Economic analysis shows that the total investment of the 20 t·d^-1 system is about RMB 9.18 million and the operating cost is about RMB 134.8/t.