| 棉花秸秆炭微波裂解生产设备研制 |
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| 引用本文： | 张佳喜,刘阿朋,李骅,王毅超,刘雄,叶尔波拉提·铁木尔.棉花秸秆炭微波裂解生产设备研制[J].农业工程学报,2020,36(8):219-225. |
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| 作者姓名： | 张佳喜 刘阿朋 李骅 王毅超 刘雄 叶尔波拉提·铁木尔 |
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| 作者单位： | 新疆农业大学机电工程学院,乌鲁木齐 830052;南京农业大学工学院,南京 210031 |
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| 基金项目： | 自治区"天山雪松计划"（2017Q19）;南京农业大学-新疆农业大学联合基金项目（20180409001） |
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| 摘 要： | 为了提高棉花秸秆的循环利用效率,分析不同参数对微波裂解棉花秸秆生产秸秆炭的产炭率的影响,该文研制了一套微波裂解设备。微波裂解设备主要由气液处理系统、裂解腔、惰性气体供应系统、恒温控制等组成,工作时微波裂解腔中的磁控管对棉花秸秆的裂解过程提供能量,使棉花秸秆达到炭化的效果。以棉花秸秆的炭产率为指标,以棉花秸秆含水率、炭化时间、微波功率为影响因素,通过Box-Behnken中心组合试验方法对微波裂解设备在裂解棉花秸秆过程中的试验因素进行三因素三水平二次回归试验。分析各因素对产炭率的影响,同时对影响因素进行综合优化。结果表明,棉花秸秆含水率和微波功率对棉花秆秸产炭率影响显著(P<0.01),最优参数组合为含水率11%、炭化时间6min、微波功率1.8 kW。验证试验结果表明,在最优参数条件下,棉花秸秆产炭率为30.9%,与理论值的相对误差为0.71%。研究结果可为棉花秸秆炭微波裂解生产设备的设计和作业参数优化提供参考。
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| 关 键 词： | 农业机械 设计 微波 棉秆炭化 响应面 |
| 收稿时间： | 2019/12/9 0:00:00 |
| 修稿时间： | 2020/3/29 0:00:00 |
Development of microwave pyrolysis equipment for cotton stalk carbon |
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| Zhang Jiaxi,Liu Apeng,Li Hu,Wang Yichao and Liu Xiong.Development of microwave pyrolysis equipment for cotton stalk carbon[J].Transactions of the Chinese Society of Agricultural Engineering,2020,36(8):219-225. |
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| Authors: | Zhang Jiaxi Liu Apeng Li Hu Wang Yichao and Liu Xiong |
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| Institution: | 1. School of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi 830052, China;,1. School of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi 830052, China;,2. Institute of technology, Nanjing Agricultural University, Nanjing 210031, China;,1. School of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi 830052, China; and 1. School of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi 830052, China; |
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| Abstract: | Cotton is an important cash crop in China, the cotton straw produced after cotton harvest is an important biomass energy. In view of the environmental problems existing in the traditional utilization of cotton straw, it is of great significance to transform cotton straw from agricultural waste to biochar. Based on the research of biochar processing equipment for cotton straw at home and abroad, it can be found that biomass carbonization equipment is mainly divided into microwave cracking carbonization and traditional electric heating carbonization. The traditional carbonization technology has the disadvantages of uneven carbonization and low carbonization efficiency. The traditional carbonization technology has the disadvantages of uneven carbonization and low carbonization efficiency, microwave cracking carbonization can not only improve carbonization homogeneity, but also shorten carbonization time. In order to improve the carbon yield of cotton straw and analyze the effect of different operation parameters on the carbon yield of cotton straw by microwave pyrolysis, a microwave cracking equipment was developed in this paper. The microwave cracking equipment was mainly composed of gas-liquid treatment system, cracking chamber, inert gas supplying system, constant temperature control system and so on. The key component of the equipment was the magnetron device in the cracking chamber, the magnetron device provided energy for the pyrolysis and carbonization of the cotton straw. Taking the moisture content of cotton straw, carbonization time and microwave power as the experimental factors and the carbon yield of cotton straw as the index, the response surface tests of three factors and three levels were carried out for the microwave cracking process of cotton straw. The quadratic polynomial response model of cotton yield of cotton straw to experimental factors was established. The significant order of the influence of each experimental factor on the carbon yield of cotton stalk was determined as water content of cotton straw, microwave power and carbonization time. Optimization of operation parameters was carried out by box benhnken combined test method, the result was that the moisture content of the cotton straw was 11%, carbonization time was 6 min and microwave power was 1.8 kW, at this time, the carbon yield reached 31.61%. The verification test results showed that under the optimal parameter conditions, the carbon yield of cotton straw was 30.9%, and the relative error with the theoretical value was 0.71%, the designed microwave cracking equipment basically meet the design requirements. The results can provide reference for the design and operation parameters optimization of microwave cracking equipment for cotton straw. |
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| Keywords: | agricultural machinery design microwave carbonization of cotton straw response surface |
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