生物质垃圾热解焚烧一体化装置设计

发布时间：2018-04-24 04:15

本文选题：生物质垃圾 + 热解　；参考：《河北工业大学》2015年硕士论文

【摘要】：近几年,我国城市生活垃圾处理问题日益严重,传统的垃圾处理方式已无法满足现代社会的要求,因此研究新的垃圾处理工艺迫在眉睫。与其它垃圾处理技术相比,垃圾热解处理技术具有污染小、减量化程度高、能源再利用率高等特点。本课题组通过分析现有的垃圾热解处理工艺,提出了一种垃圾在烟气气氛下的热解工艺。本文以生物质垃圾为研究对象,在前期研究的基础上总结了生物质垃圾的热解机理及其影响因素,并进行了管式炉等温热解实验分析。基于管式炉热解实验研究的局限性,设计了一种连续热解反应器,并利用该反应器进行了玉米秸秆在烟气气氛下的热解实验。通过分析各因素对热解产物分布的影响规律,烟气气氛下热解工艺宜采用较高的热解温度,并且尽可能的延长气相滞留时间。同时为了提高碳的转化率,还需要保障一定的固相滞留时间。通过管式炉恒温热解实验,对比分析了白菜在烟气和N2气氛下的产气规律。实验结果表明,烟气气氛下可以有效地增加CO产量。与前期实验结果相比,恒温下热解产气规律更接近于实际情况。但是,由于管式炉无法实现连续进料,热解气各组分浓度的分析结果要远小于实际值。自主设计的燃烧器和连续热解反应器可实现物料在烟气气氛下连续热解。通过分析不同工况下的实验结果,得出在甲烷流量为3L/min,转速为0.5r/min的工况下热解效果最佳,热解气热值约为2MJ/m3,物料热解反应时间大约为16min,处理量约为0.72kg/h。
[Abstract]:In recent years, the problem of municipal solid waste (MSW) disposal in our country has become more and more serious. The traditional waste disposal method can not meet the requirements of modern society, so it is urgent to study the new garbage treatment technology. Compared with other waste treatment technologies, the waste pyrolysis treatment technology has the characteristics of less pollution, higher reduction degree and higher energy reuse rate. Based on the analysis of the existing pyrolysis process, a pyrolysis process of garbage in flue gas atmosphere was proposed. In this paper, the pyrolysis mechanism of biomass waste and its influencing factors were summarized on the basis of previous research, and the experimental analysis of isothermal pyrolysis in tubular furnace was carried out. A continuous pyrolysis reactor was designed based on the limitation of the experimental study on pyrolysis of tubular furnace, and the pyrolysis experiment of corn straw in flue gas atmosphere was carried out by using the reactor. By analyzing the influence of various factors on the distribution of pyrolysis products, the pyrolysis process in flue gas atmosphere should adopt higher pyrolysis temperature and prolong the gas phase retention time as much as possible. At the same time, in order to improve the conversion of carbon, it is necessary to guarantee the retention time of solid phase. Through the experiment of constant temperature pyrolysis in tubular furnace, the gas production law of Chinese cabbage in flue gas and N2 atmosphere was compared and analyzed. The experimental results show that CO production can be increased effectively in flue gas atmosphere. Compared with the previous experimental results, the law of pyrolysis gas production at constant temperature is closer to the actual situation. However, because the tube furnace can not realize the continuous feed, the analytical results of the pyrolysis gas component concentration are much smaller than the actual value. The self-designed burner and continuous pyrolysis reactor can realize the continuous pyrolysis of materials in flue gas atmosphere. By analyzing the experimental results under different operating conditions, it is concluded that the pyrolysis efficiency is the best under the condition of methane flow rate of 3 L / min and rotational speed of 0.5r/min. The pyrolysis gas calorific value is about 2MJ / m3, the reaction time of material pyrolysis is about 16 mins, and the treatment capacity is about 0.72 kg / h.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X705

【参考文献】