微波裂解设备设计与工艺试验

Design and process test of microwave cracking equipment

为了提高农业废弃物的循环利用,设计了一款用于裂解炭化废弃农作物循环利用的农业装备。设备的微波总功率最大为3.6 kW,频率选用工业常用的频率2.45 GHz,裂解腔的直径为120 mm,高为700 mm;采用HFSS对裂解腔内部的电场进行仿真,通过仿真可得裂解腔内部的电场分布较为均匀。设计三因素三水平交互工艺性试验,以裂解腔直径尺寸、微波功率、裂解温度为试验因素,经过试验可确定主次试验因素为裂解腔直径尺寸>微波功率>裂解温度,通过Design-Export得出最优试验方案为微波裂解腔直径81.84 mm,微波功率1.95 kW,裂解温度325.51℃,炭产率为30.16%,经过试验验证棉杆的炭产率为29.87%,与软件优化值相差较小,可知设备满足设计要求。

In order to improve the recycling of agricultural waste,agricultural equipment for the recycling of cracked and carbonized waste crops was designed.The maximum microwave power of the equipment was 3.6 kW,and the frequency was 2.45 GHz,which was commonly used in industry.The diameter of the cracking chamber was 120 mm,and the height was 700 mm.HFSS was used to simulate the electric field in the cracking chamber,and the electric field distribution in the cracking chamber was relatively uniform.The three factors and three levels interactive technological test was designed.Taking cracking chamber diameter size,microwave power and cracking temperature as the test factors,the primary and secondary test factors could be determined as cracking chamber diameter size>microwave power>cracking temperature through the test.Through the Design-Export optimization,the optimal test scheme was microwave cracking chamber diameter of 81.84 mm,microwave power of 1.95 kW,and cracking temperature of 325.51℃,and the carbon yield was 30.16%.After test verification,the carbon yield of the cotton stalk was 29.87%,which was slightly different from the software optimization value,so the equipment met the design requirements.