内旋式移动床煤热解新工艺开发及试验  

Research of new inner-rotary moving bed technology for low rank coal pyrolysis

作　　者：白效言[1,2,3,4] 曲思建 张飏[2,3,4] 王岩 裴贤丰 BAI Xiaoyan;QU Sijian;ZHANG Yang;WANG Yan;PEI Xianfeng(China Coal Research Institute,Beijing 100013,China;Beijing Research Institute of Coal Chemistry,China Coal Research Institute,Beijing 100013,China;State Key Laboratory of Coal Mining and Clean Utilization,Beijing 100013,China;National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control,Beijing 100013,China)

机构地区：[1]煤炭科学研究总院,北京100013 [2]煤炭科学技术研究院有限公司煤化工分院,北京100013 [3]煤炭资源高效开采与洁净利用国家重点实验室,北京100013 [4]国家能源煤炭高效利用与节能减排技术装备重点实验室,北京100013

出　　处：《化工进展》2020年第3期984-991,共8页Chemical Industry and Engineering Progress

基　　金：国家重点研发计划(2018YFB0605003)。

摘　　要：采用2t/d外热内旋式移动床热解试验装置,通过控制反应器物料热解区及粉尘沉降气室区的温度,研究了内旋式移动床工艺温度分布对13mm以下神木煤热解产物产率及性质的影响规律。结果表明:物料热解温度控制为650℃和700℃时,煤料均实现了较好热解,半焦挥发分Vdaf降低至10.36%~11.95%;相同物料热解温度,提高粉尘沉降气室温度后,辐射传热作用增强,半焦和焦油产率降低,煤气产率升高;在物料热解温度700℃,粉尘沉降气室温度500℃时,焦油收率Tard最高,为7.44%;物料热解温度为650℃,焦油模拟蒸馏360℃以下馏分含量为63.3%~72.0%,物料热解温度700℃时为67.5%~72.2%;相同物料热解温度,提高粉尘沉降气室温度后,焦油中轻油组分减少,洗油和沥青质含量增加,煤气中氢气含量增加;粉尘沉降气室温度达到550℃时,挥发物二次反应作用明显强于450℃和500℃;各工艺条件下,焦油中喹啉不溶物含量均低于1%,最低为0.51%。By controlling the temperatures of material pyrolysis and dust settling zones, 2 t/d testing device with an inner-rotary moving bed pyrolysis reactor was used to research the influence of reactor temperature distribution on the yield and quality of pyrolysis product of Shenmu coal(size 0-13 mm) to summary the mechanism of the inner-rotary moving bed pyrolysis technology. The results showed that the volatile(Vdaf) of semicokes reduced to a suitable level of 10.36%-11.95% at pyrolysis temperature 650℃and 700℃. The increase of dust settling zone temperature decreased the yield of semicokes and coal tar while enhanced the yield of coal gas under the same pyrolysis zone temperature for the radiation heat transfer effect. The highest coal tar yield(Tard) was 7.44% at pyrolysis zone temperature of 700℃ and dust settling zone temperature of 500℃. The contents of light fraction(boiling point<360℃) in coal tar were63.3%-72.0% and 67.5%-72.2% at pyrolysis zone temperature 650℃ and 700℃, respectively.Moreover, the study revealed that the increase of dust settling zone temperature would decrease the light oil content and increase the washing oil, asphaltine and hydrogen content in gas at a same pyrolysis zone temperature. The secondary reaction of volatiles were remarkably enhanced when the dust settling zone temperature was 550℃ than 450℃ and 500℃. In addition, the dust contents(QI content) of coal tar obtained under all the conditions were less than 1% with the lowest 0.51%, which were very helpful for the downstream processes.

关 键 词：内旋式 移动床 温度场 产物品质 低阶煤热解 

分 类 号：TQ530.2[化学工程—煤化学工程]