CAJ | 학술논문

在气流床气化实验装置上进行了松木粉气化特性的研究。考察了温度、氧当量比、水蒸气配比对气体产物的成分、气化特性和固体产物的微观形态及成分的影响,结果表明,随着温度的升高,CO与H2浓度显著升高,CO2与CH4浓度明显下降,碳转化率、产气率、产气热值有所提高；氧当量比从0.2上升至0.5时,CO与H2浓度降低超过10%,CO2浓度则上升100%以上,碳转化率提高至92.9%,产气率有所上升,而产气热值则降低超过20%；水蒸气配比从0增大至0.58时,H2/CO体积比由0.63提高为1.40,碳转化率、产气率和产气热值均呈现先增大后减小趋势。由SEM照片可以看出,固体残渣主要由类球状或块状结构与纤维团聚结构两部分组成。温度升高使残渣颗粒由呈现不规则形状逐渐向球形转化,氧当量比的增大使残渣中类球状颗粒表面孔洞与裂缝明显增多直至破碎。
재기류상기화실험장치상진행료송목분기화특성적연구。고찰료온도、양당량비、수증기배비대기체산물적성분、기화특성화고체산물적미관형태급성분적영향,결과표명,수착온도적승고,CO여H2농도현저승고,CO2여CH4농도명현하강,탄전화솔、산기솔、산기열치유소제고；양당량비종0.2상승지0.5시,CO여H2농도강저초과10%,CO2농도칙상승100%이상,탄전화솔제고지92.9%,산기솔유소상승,이산기열치칙강저초과20%；수증기배비종0증대지0.58시,H2/CO체적비유0.63제고위1.40,탄전화솔、산기솔화산기열치균정현선증대후감소추세。유SEM조편가이간출,고체잔사주요유류구상혹괴상결구여섬유단취결구량부분조성。온도승고사잔사과립유정현불규칙형상축점향구형전화,양당량비적증대사잔사중류구상과립표면공동여렬봉명현증다직지파쇄。
The pine powder gasification was conducted in a bench-scale entrained flow reactor. The influences of temperature,oxygen equivalence ratio and steam/biomass ratio on the composition of the gaseous products, carbon conversion, gas yield, LHV, morphology and composition of solid products were studied. The results show that when the reaction temperature increases gradually, the concentrations of CO and H2 rise dramatically and the concentrations of CO2 and CH4 significantly decrease. The carbon conversion, gas yield, and LHV also improve slightly. With a rise of oxygen equivalence ratio from 0. 2 to 0. 5, the concentrations of CO and H2 decrease by over 10%, the concentration of CO2 increases by 100%, and the carbon conversion reaches to 92. 9%. Simultaneously, the gas yield also increases slightly, while the LHV exhibits opposite trends. When the steam/biomass ratio increases from 0 to 0. 58, the H2/CO volume ratio grows gradually from 0. 63 to 1. 40. At the same time, the carbon conversion, gas yield and LHV first increase slowly then decrease rapidly. The analysis by scanning electron microscopy shows that the solid residue of gasification mainly consists of particles and fiber reunion. With increasing reaction temperature, the shape of particles in the solid residue changes gradually from irregular to spherical, while the higher oxygen equivalence ratio makes the number of pores and slits on particles increase rapidly and leads to the breaking of the particles.