CAJ | 학술논문

在小型流化床(φ50 mm、高1 600 mm)实验装置上对沛城煤矿天然焦-蒸汽气化反应进行实验研究,考察蒸汽中掺入氧气,共同作为气化介质对气化反应产气量、碳转化率、煤气热值和煤气组分等因素的影响,同时与ASPEN PLUS 软件对其气化过程的模拟结果进行了对比.实验中,天然焦试样量0.2 kg/h,蒸汽量1.05 kg/h,气化温度900 ℃,实验结果表明:气化介质中氧量明显影响天然焦蒸汽气化特性.随着氧含量的增加,初始阶段(0～0.2 L/min)煤气产量提高了1.76倍,碳转化率提高了1.94倍,两者均显著增加;随着氧量的进一步增加(0.2～1.0 L/min),其增加幅度趋缓,产气量增加1.16倍,碳转化率增加1.34倍.煤气中有效气体(H_2+CO+CH_4)的体积分数和煤气热值均持续减少,有效气体份额从76.9%下降到54.3%,煤气热值从9.01 MJ/m~3减少到6.34 MJ/m~3,而CO_2体积分数增加明显,从23.1%增加到37.3%.Aspen模拟结果与实验结果基本一致,具有实际指导意义.
재소형류화상(φ50 mm、고1 600 mm)실험장치상대패성매광천연초-증기기화반응진행실험연구,고찰증기중참입양기,공동작위기화개질대기화반응산기량、탄전화솔、매기열치화매기조분등인소적영향,동시여ASPEN PLUS 연건대기기화과정적모의결과진행료대비.실험중,천연초시양량0.2 kg/h,증기량1.05 kg/h,기화온도900 ℃,실험결과표명:기화개질중양량명현영향천연초증기기화특성.수착양함량적증가,초시계단(0～0.2 L/min)매기산량제고료1.76배,탄전화솔제고료1.94배,량자균현저증가;수착양량적진일보증가(0.2～1.0 L/min),기증가폭도추완,산기량증가1.16배,탄전화솔증가1.34배.매기중유효기체(H_2+CO+CH_4)적체적분수화매기열치균지속감소,유효기체빈액종76.9%하강도54.3%,매기열치종9.01 MJ/m~3감소도6.34 MJ/m~3,이CO_2체적분수증가명현,종23.1%증가도37.3%.Aspen모의결과여실험결과기본일치,구유실제지도의의.
On a small-sized fluidized bed (diameter φ50 mm and height 1 600 mm) test rig, an experimental study has been performed of Peicheng-originated natural coke-steam gasification reaction. The influence of the gasification medium steam, when mixed with oxygen, on the gas production capacity, carbon conversion rate, coal gas heating value and gas constituents etc. was nvestigated and compared with the simulation results of the gasification process obtained by using software ASPEN PLUS. During the test, the amount of natural coke sample has reached 0.2 kg/h, the steam flow rate was 1.05 kg/h and the gasification temperature was 900 ℃. The test results show that the oxygen content in the gasification medium influences evidently the natural coke steam gasification characteristics. With an increase of the oxygen content (0～0.2 L/min) in the initial stage, the coal gas production capacity will increaase by 1.76 times, and the carbon conversion rate, by 1.94 times, both of which rise remarkably. With a further increase of the oxygen content (0.2～1 L/min), the growth margin will gradually decrease, the gas production capacity, increase by 1.16 times and the carbon conversion rate will rise by 1.34 times. The volumetric fraction of effective gases (H_2+CO+CH_4) in the coal gas and its heating value will continue to go down. The effective gas proportion will descend from 76.9% to 54.3 % and the heating value of the coal gas, decrease from 9.01 MJ/m~3 to 6.34 MJ/m~3, but the volumetric fraction of CO_2 will increase obviously, from 23.1 % to 37.3 %. The simulation results obtained by using software ASPEN asically correspond with the test ones. Therefore, the foregoing can offer guidance for practical ngineering applications.