CAJ | 학술논문

针对中国生物炭设备中存在的运行不稳定、炭产出率低、副产品回收利用难等问题，该文设计了卧式连续生物炭炭化设备，热解反应器采用双层套筒结构，内层为炭化室，内置螺旋输送机，外层为高温烟气套筒，利用炭化自身产生的高温烟气燃烧产生的热量进行炭化。选择了热解参数，开展了热工设计和可燃气燃烧器热计算，并对炭化室、高温烟气套筒等关键部件进行了结构设计。采用稻壳原料进行了炭化试验，试验结果表明，卧式连续炭化设备实现了连续稳定运行，炭化设备设计合理，原料适用性广，小时生产率为45kg/h，稻壳炭化终温为500℃，炭化得率质量分数为42%。实现了设计目标，提高了炭化得率，为中国生物炭产业的发展提供了理论基础和技术支持。
침대중국생물탄설비중존재적운행불은정、탄산출솔저、부산품회수이용난등문제，해문설계료와식련속생물탄탄화설비，열해반응기채용쌍층투통결구，내층위탄화실，내치라선수송궤，외층위고온연기투통，이용탄화자신산생적고온연기연소산생적열량진행탄화。선택료열해삼수，개전료열공설계화가연기연소기열계산，병대탄화실、고온연기투통등관건부건진행료결구설계。채용도각원료진행료탄화시험，시험결과표명，와식련속탄화설비실현료련속은정운행，탄화설비설계합리，원료괄용성엄，소시생산솔위45kg/h，도각탄화종온위500℃，탄화득솔질량분수위42%。실현료설계목표，제고료탄화득솔，위중국생물탄산업적발전제공료이론기출화기술지지。
The burning of fossil fuels, the changes in agricultural and land utilization, as well as the industrial processes produce a lot of carbon dioxide and other greenhouse gases causing global warming. Climate increasingly has become one of the most far-reaching global environmental issues. The carbon can be stabilized by biochar for hundreds of years while the carbon element is very difficult to break down after mineralization. With the function of carbon sequestration and soil improvement in agriculture, it turns out to be one of the main ways to reduce carbon emissions in the future. Currently, the producing of biochar has become a hot topic both at home and abroad. In this paper, aiming at the existence of unstable operations, low percentage of biochar outputs, as well as the difficultly of recycling of by-products of China biochar, equipment designs of the horizontal equipment for continuous carbonization of biomass, which uses external thermal heating carbonization of feedstock. The difference requires an external heating fuel, the heat required for the dissertation utilizes the high temperature and gas combustion-generated calorie to carbonize the raw materials., Combustion flue gas during start-up and insufficient supply combined with diesel auxiliary heating of the equipment, the pyrolytic reactor of which is double-layer structure, with the inner layer carbonization chamber equipped with the built-in screw conveyor while the out layer high-temperature flue sleeve, using the motor speed, to ensure the continuous feeding of material, mixing and uniform heat transfer to achieve a biological continuous production of charcoal and carbonization temperature-controlled. The reactor outer sleeve for the high temperature flue gas, the use of high temperature gas to heat biomass, and the outer cylinder has baffles and fins, extending the residence time of the flue gas, and increasing the heat transfer coefficient to achieve a sufficient heat exchange. The paper chooses pyrolysis parameters, thermal design and conducts gas combustion thermal calculation., The 100 kg corn stalks can be producing 30 m3of combustion gas, completing combustion flue gas flow rate of 96.9 m3, consuming 15.3 m3/h of gas that can meet the requirements, the remaining 14.7 m3/h of gas can be used for other purposes. While the key components of the carbonization chamber, flue gas temperature structural design of the sleeve, etc., come to the heating equipment length 4.24 m, inner tube inner diameter of 0.5 m, the outer tube inner diameter of 0.55 m. Finally taking the rice hulls for the carbonization experiment, the results of which indicates that the horizontal equipment for continuous carbonization of biomass has the realization of sustainable stable operation, reasonable designing of carbonization equipment, as well as the wide range of applicability. The productivity of which is 45 kg/h, the terminal temperature of carbonization 500℃ and the ratio of char yield 42%, and taking advantage of all the by-products of carbonization, reducing pollutant emissions. With the realization of a designing goal and the improvement of biochar percentage, the dissertation provides a theoretical basis and technological support for the biochar industry of China.