堆肥反应器运行方式对内部温度场影响的表征

Characterization of the influence of composting reactors with different operation strategies on internal temperature fields

本研究针对曝气方式各异的A(底部曝气)、B(中心曝气)、C(四周曝气)3套堆肥反应器,在空载状态下考察了外环境温度、曝气速率、曝气部位和搅拌操作对堆肥反应器内部温度场分布的影响,并通过负载模拟物料试验进行验证。结果表明:供试的4种条件均会对内部温度场分布产生明显影响,尤其是外环境温度的变化会加大反应器内温度差。当曝气速率为0.75 m^(3)/h时,供试的3套反应器内部温度场分布较均匀,但C反应器温度场优于A和B反应器。综合来看,0.75 m^(3)/h的曝气速率、四周曝气是较利于温度场分布的曝气策略。本研究通过优化获取了堆肥反应器较优的运行参数,为有机固体废弃物处理提供了科学依据。

Three types of compositing reactors,namely A with bottom aeration,B with central aeration,and C with surrounding aeration,were designed.The effects of ambient temperatures,aeration rates,aeration positions and stirring operations on the temperature fields distributing inside the composting reactors were investigated under no-load condition,and verified by loading test with loading simulated materials.The results showed that the tested four conditions had significant impacts on the internal temperature field distribution,especially the change of the ambient temperature increased the temperature discrepancy inside the reactors.When the aeration rate was 0.75 m^(3)/h,the internal temperature fields of the three tested reactors were evenly distributed,but the temperature field in the reactor C was the best.Overall,the aeration rate of 0.75 m^(3)/h and the surrounding aeration were more favorable aeration strategies for the temperature field distribution.This research aims to obtain better operating parameters of the composting reactor through optimization,and provides a key basis for the treatment of organic solid waste.