化学工程
化學工程
화학공정
CHEMICAL ENGINEERING
2014年
8期
12-16
,共5页
吕兆川%李景东%张兆玲%董玉平%梁敬翠%盖超%杨帅
呂兆川%李景東%張兆玲%董玉平%樑敬翠%蓋超%楊帥
려조천%리경동%장조령%동옥평%량경취%개초%양수
生物质气化%固定床%气化炉%燃气热值%焦油
生物質氣化%固定床%氣化爐%燃氣熱值%焦油
생물질기화%고정상%기화로%연기열치%초유
biomass gasification%fixed-bed%gasifier%gas heat value%tar
采用自主研发的连续运行主动配气下吸式固定床气化炉为试验平台，研究了不同配气工艺下气化炉内温度场和压力场的变化，并且以稻草为气化原料进行气化试验，分析了不同配气工艺对燃气组分、燃气热值和燃气中焦油质量浓度的影响。结果表明：改变配气工艺从单层配气到双层配气再到三层配气，反应炉内温度逐渐升高，反应炉内各层压力逐渐均匀，三层配气时炉内氧化层温度在1100℃左右，炉内最高压力为24．1 kPa，三层配气时气化炉内温度场和压力场的分布具有较高气化反应特性；同单层配气和双层配气相比，三层配气工艺下以稻草为气化原料燃气组分中H2和CO的体积分数明显提高，其值分别为10．23％和20．49％，相比于单层配气提高了3．08％和2．28％，单层配气、双层配气和三层配气工艺下燃气热值分别为4656．82 kJ/m3、4934．99 kJ/m3和5476．77 kJ/m3，燃气中焦油质量浓度分别为0．834×10-3 kg/m3、0806×10-3 kg/m3和0．721×10-3 kg/m3。
採用自主研髮的連續運行主動配氣下吸式固定床氣化爐為試驗平檯，研究瞭不同配氣工藝下氣化爐內溫度場和壓力場的變化，併且以稻草為氣化原料進行氣化試驗，分析瞭不同配氣工藝對燃氣組分、燃氣熱值和燃氣中焦油質量濃度的影響。結果錶明：改變配氣工藝從單層配氣到雙層配氣再到三層配氣，反應爐內溫度逐漸升高，反應爐內各層壓力逐漸均勻，三層配氣時爐內氧化層溫度在1100℃左右，爐內最高壓力為24．1 kPa，三層配氣時氣化爐內溫度場和壓力場的分佈具有較高氣化反應特性；同單層配氣和雙層配氣相比，三層配氣工藝下以稻草為氣化原料燃氣組分中H2和CO的體積分數明顯提高，其值分彆為10．23％和20．49％，相比于單層配氣提高瞭3．08％和2．28％，單層配氣、雙層配氣和三層配氣工藝下燃氣熱值分彆為4656．82 kJ/m3、4934．99 kJ/m3和5476．77 kJ/m3，燃氣中焦油質量濃度分彆為0．834×10-3 kg/m3、0806×10-3 kg/m3和0．721×10-3 kg/m3。
채용자주연발적련속운행주동배기하흡식고정상기화로위시험평태，연구료불동배기공예하기화로내온도장화압력장적변화，병차이도초위기화원료진행기화시험，분석료불동배기공예대연기조분、연기열치화연기중초유질량농도적영향。결과표명：개변배기공예종단층배기도쌍층배기재도삼층배기，반응로내온도축점승고，반응로내각층압력축점균균，삼층배기시로내양화층온도재1100℃좌우，로내최고압력위24．1 kPa，삼층배기시기화로내온도장화압력장적분포구유교고기화반응특성；동단층배기화쌍층배기상비，삼층배기공예하이도초위기화원료연기조분중H2화CO적체적분수명현제고，기치분별위10．23％화20．49％，상비우단층배기제고료3．08％화2．28％，단층배기、쌍층배기화삼층배기공예하연기열치분별위4656．82 kJ/m3、4934．99 kJ/m3화5476．77 kJ/m3，연기중초유질량농도분별위0．834×10-3 kg/m3、0806×10-3 kg/m3화0．721×10-3 kg/m3。
Investigating the biomass gasification using an active air distribution way.The tests were carried out based on a downdraft fixed-bed gasifier.The effects of temperature and stress in the reactor on the gas composition, gas heating value and tar mass concentration in the raw gas were investigated using straw as material.The results show that the temperature gradually increases and the pressure gets uniform gradually inside the reactor,as the gas distribution process changes from single distribution to double distribution and then to triple distribution,the oxide layer temperature is about 1 100 ℃ and the maximum pressure is 24.1 kPa in the triple distribution,and the temperature and pressure distribution in the gasifier,which comes from the triple distribution,has a higher gasification characteristics.The volume fractions of H2 and CO significantly increase in the triple distribution,when compared with other distribution processes,and the values are 10.23% and 20.49%,respectively,increased by 3.08% and 2.28% compared to the single distribution,respectively.The gas calorific values are 4 656.82, 4 934.99,5 476.77 kJ/m3 and the tar content in the gas are 0.834 ×10 -3,0.806 ×10 -3,0.721 ×10 -3 kg/m3, respectively,according to the order of single distribution to double distribution then to triple distribution.
