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通风量对有机废弃物生物干化的影响

向虹霖,  蒋建国,  高语晨,  孟园,  徐一雯,  艾克来木·艾合买提,  鞠彤瑶,  韩思宇,  郭晏然

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文章导航 > 环境工程  > 2020 >  38(2): 128-134
向虹霖, 蒋建国, 高语晨, 孟园, 徐一雯, 艾克来木·艾合买提, 鞠彤瑶, 韩思宇, 郭晏然. 通风量对有机废弃物生物干化的影响[J]. 环境工程, 2020, 38(2): 128-134. doi: 10.13205/j.hjgc.202002017
引用本文: 向虹霖, 蒋建国, 高语晨, 孟园, 徐一雯, 艾克来木·艾合买提, 鞠彤瑶, 韩思宇, 郭晏然. 通风量对有机废弃物生物干化的影响[J]. 环境工程, 2020, 38(2): 128-134. doi: 10.13205/j.hjgc.202002017
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XIANG Hong-lin, JIANG Jian-guo, GAO Yu-chen, MENG Yuan, XU Yi-wen, AIKELAIMU Aihemaiti, JU Tong-yao, HAN Si-yu, GUO Yan-ran. EFFECT OF AIR-FLOW RATE ON BIO-DRYING OF ORGANIC WASTE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(2): 128-134. doi: 10.13205/j.hjgc.202002017
Citation: XIANG Hong-lin, JIANG Jian-guo, GAO Yu-chen, MENG Yuan, XU Yi-wen, AIKELAIMU Aihemaiti, JU Tong-yao, HAN Si-yu, GUO Yan-ran. EFFECT OF AIR-FLOW RATE ON BIO-DRYING OF ORGANIC WASTE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(2): 128-134. doi: 10.13205/j.hjgc.202002017
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通风量对有机废弃物生物干化的影响

doi: 10.13205/j.hjgc.202002017

  • 清华大学 环境学院, 北京 100084

基金项目: 

国家重大科技专项-污泥与废弃物处置及资源化利用技术集成与综合示范（2017ZX07202005）。

详细信息
    作者简介:

    向虹霖(1994-),女,硕士研究生,主要研究方向为有机废弃物生物干化及其资源化利用。xianghl18@mails.tsinghua.edu.cn

    通讯作者:

    蒋建国(1970-),男,博士,教授。jianguoj@tsinghua.edu.cn

EFFECT OF AIR-FLOW RATE ON BIO-DRYING OF ORGANIC WASTE

  • School of Environment, Tsinghua University, Beijing 100084, China

    摘要
  • 摘要: 通过有机废弃物生物干化实验，研究了通风量对生物干化效果的影响。实验以果蔬、厨余和园林垃圾几种典型有机废弃物作为原料，设置3个梯度的通风量，对其温度、含水率和有机质含量变化对比发现：通风量会显著影响生化干化指数、空气利用率以及干化后物料的低位热值。低通风量下温度升高明显，且空气利用率较高，但携带水汽能力较弱，难以有效带走物料水分；高通风量下难以维持高温，热量损失较大，但物料最终含水率最低。当通风量为48 L/（kg·h）时，果蔬与园林协同干化的最终含水率能降低到13.97%，生物干化指数为2.34，物料的低位热值最终达到13932 kJ/kg，较初始热值提升了322%，能够基本满足制备垃圾衍生燃料（RDF）的条件，且能够在相对更低的能耗下提高生物干化效果。
    Abstract: The effect of air-flow rate on bio-drying was studied in the bio-drying experiments on typical organic waste. The experiment set three gradients of air-flow rate using typical organic wastes, such as fruits and vegetables, kitchen waste and garden waste as the raw materials. The comparison of temperature, moisture contents (MC) and volatile solid (VS) showed that the air-flow rate would significantly affect the bio-drying index air efficiencies and lower heating value (LHV). On the condition of lower air-flow rate, the reactor temperature rose rapidly and the air efficiency would be higher, but had poor ability to carry water vapor, which was difficult to effectively remove the moisture content; under the condition of higher air-flow rate, it was hard for the reactor to maintain higher temperature with more heat loss, but got the lowest final moisture content. At an air-flow rate of 48 L/(kg·h), the final moisture content could be reduced to 13.97%,and the bio-drying index was 2.34. The final LHV was found as high as 13932 kJ/kg, increased by 322% compared with initial one, which met the requirement of refuse derived fuel(RDF) production and improved the bio-drying effect at a lower energy consumption.
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