重组分分离及制浆一体机在有机垃圾处置中的应用研究

Application Research of Heavy Component Separation and Pulping Machine in Organic Refuse Disposal

依托中材环境溧阳天山生活垃圾处置项目,原料采用从原生垃圾中通过机械分选出的有机垃圾,利用设计和研发的有机垃圾重组分分离及制浆一体机进行了中试试验,分析了不同的操作参数对设备运行效果的影响。结果表明,该设备能够实现有机垃圾中重组分的分离,制得的有机质浆液满足后续CSTR厌氧产沼的技术要求。通过对比试验发现,最佳的操作参数是:进料TS为8%~10%,转速为150 r/min,反冲洗水流量20 L/s。该操作参数下能实现良好的轻重组分分离,最终分离出的重组分大部分未经打碎破坏,有机质含量低于5%,含水率低于5%,用于路基、填埋或者水泥生产原料均可。制浆时间≤5 min时,制得的有机质浆液中TS为4%~6%,VS/TS≥60%,COD≥100 000 mg/L,满足CSTR厌氧反应器的进料要求,轻渣无机质含量≤10%,通过脱水后热值为8 372~10 465 kJ/kg,可以入焚烧炉处置。

Relying on Liyang Tianshan municipal solid waste(MSW)disposal project of Sinoma-Environment,the raw materials was organic waste that mechanically separated from MSW,and a pilot test was carried out with the organic waste heavy component separation and pulping machine,and the influence of different operating parameters on the operation effect of the equipment was analyzed.The results showed that the equipment could realize the separation of heavy component from organic refuse,and the accepts could meet the technical requirements of CSTR.Through comparative tests,it was found that the best operating parameters were feeding TS of 8%~10%,rotation speed of 150 r/min,backwash water flow of20 L/s.Under these operating parameters,a good separation of the heavy component could be achieved.Most of the heavy component separated from the waste were not broken,with the organic matter content less than 5% and the moisture content less than 5%,which could be used for subgrade,landfill or raw materials used for cement production.When the pulping time was less than five minutes,the TS in the organic slurry was 4%~6%,VS/TS was more than 60%,and the COD was more than 100 000 mg/L,which met the feed requirements of CSTR anaerobic reactor.The inorganic content of light slag was less than 10%,after dehydration,the calorific value was 8 372~10 465 kJ/kg,which could disposed into the incinerator.