化学反应工程与工艺
化學反應工程與工藝
화학반응공정여공예
CHEMICAL REACTION ENGINEERING AND TECHNOLOGY
2014年
4期
303-309
,共7页
Gibbs自由能%气流床%气化炉%固体燃料%模拟
Gibbs自由能%氣流床%氣化爐%固體燃料%模擬
Gibbs자유능%기류상%기화로%고체연료%모의
Gibbs free energy%entrained flow bed%gasifier%solid fuel%simulation
采用Gibbs自由能最小化原理考察了气流床中不同固体燃料-氧气的气化特性以探索固体燃料-氧气气化规律。考察了气流床中不同固体燃料（H和C物质的量比（H/C比）为0～1.6，O和C物质的量比（O/C比）为0.1～0.8）在氧气气氛下完全气化时所能达到的平衡温度、合成气组成、气化炉有效能效率及所需当量氧气比。结果表明：固体燃料H/C比一定时，低O/C比下，H2和CO含量保持恒定，H2O和CO2含量较少；高O/C比下完全气化所需当量氧气比迅速降低，平衡温度降至700℃（O/C比大于0.6），气化炉有效能效率也呈现下降趋势，H2和CO含量减少，CO2和H2O含量增加。固体燃料O/C比一定时，随着H/C比增加，平衡温度迅速降低（O/C比小于0.6），气化炉有效能效率也随之减少，CO含量减少，H2，CO2和H2O含量增加。
採用Gibbs自由能最小化原理攷察瞭氣流床中不同固體燃料-氧氣的氣化特性以探索固體燃料-氧氣氣化規律。攷察瞭氣流床中不同固體燃料（H和C物質的量比（H/C比）為0～1.6，O和C物質的量比（O/C比）為0.1～0.8）在氧氣氣氛下完全氣化時所能達到的平衡溫度、閤成氣組成、氣化爐有效能效率及所需噹量氧氣比。結果錶明：固體燃料H/C比一定時，低O/C比下，H2和CO含量保持恆定，H2O和CO2含量較少；高O/C比下完全氣化所需噹量氧氣比迅速降低，平衡溫度降至700℃（O/C比大于0.6），氣化爐有效能效率也呈現下降趨勢，H2和CO含量減少，CO2和H2O含量增加。固體燃料O/C比一定時，隨著H/C比增加，平衡溫度迅速降低（O/C比小于0.6），氣化爐有效能效率也隨之減少，CO含量減少，H2，CO2和H2O含量增加。
채용Gibbs자유능최소화원리고찰료기류상중불동고체연료-양기적기화특성이탐색고체연료-양기기화규률。고찰료기류상중불동고체연료（H화C물질적량비（H/C비）위0～1.6，O화C물질적량비（O/C비）위0.1～0.8）재양기기분하완전기화시소능체도적평형온도、합성기조성、기화로유효능효솔급소수당량양기비。결과표명：고체연료H/C비일정시，저O/C비하，H2화CO함량보지항정，H2O화CO2함량교소；고O/C비하완전기화소수당량양기비신속강저，평형온도강지700℃（O/C비대우0.6），기화로유효능효솔야정현하강추세，H2화CO함량감소，CO2화H2O함량증가。고체연료O/C비일정시，수착H/C비증가，평형온도신속강저（O/C비소우0.6），기화로유효능효솔야수지감소，CO함량감소，H2，CO2화H2O함량증가。
The gasification performances of different solid fuels calculated based on Gibbs free energy minimization principle were investigated using oxygen as gasifier to explore the solid fuels gasification law. The required equivalence oxygen ratio, equilibrium temperature, contents of syngas and gasifier energy efficiency were studied when the solid fuel (the molar ratio of hydrogen to carbon (H/C) ranged in 0-1.6, the molar ratio of oxygen to carbon (O/C) ranged in 0.1-0.8) was completely gasified by oxygen in entrained flow bed. The simulation results showed that the concentration of H2 and CO were independent from O/C ratio of fuels and the concentration of H2O and CO2were low for low O/C ratio of fuels with constant H/C ratio in solid fuels. And for high O/C ratio of fuels with constant H/C ratio in solid fuels, the required equivalence oxygen ratio decreased sharply, the equilibrium temperature decreased to 700℃ (at O/C > 0.6), and the gasifier energy efficiency tended to decrease, correspondingly with the decrease in H2 and CO and increase in CO2 and H2O. When the O/C ratio in solid fuels was constant, with the increase of H/C ratio of fuel, the equilibrium temperature dropped in a fast speed (at O/C < 0.6), similarly, the gasifier energy efficiency and CO content tended to decrease, whereas, the H2, CO2 and H2O concentrations increased.
