连续外热式低阶煤热解-干熄焦反应实验研究  

Experimental Study on Continuous Externally Heated Lowrank Coal Pyrolysis Coupled With Coke Dry Quenching

作　　者：罗元培 张盛平 任文君 代飞 隋军[2,3] LUO Yuanpei;ZHANG Shengping;REN Wenjun;DAI Fei;SUI Jun(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Laboratory of Distributed Energy Supply and Renewable Energy,Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Science,Beijing 100049,China;Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei 230027,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049 [2]中国科学院工程热物理研究所,分布式供能与可再生能源实验室,北京100190 [3]中国科学院大学,北京100049 [4]中国科学技术大学热能科学与能源工程系,合肥230027

出　　处：《工程热物理学报》2025年第4期1355-1367,共13页Journal of Engineering Thermophysics

基　　金：国家重点研发计划青年科学家项目(No.2023YFB4102600);煤炭院先导专项A(No.XDA29010600)。

摘　　要：本文开发了一种外热式低阶煤热解-干熄焦一体化的移动床反应器,并重点考察了反应器中不同热解温度(650∼900℃)、煤炭粒径(1∼10 mm,10∼20 mm,20∼30 mm)、煤炭种类(鄂尔多斯及榆林煤)等关键因素对煤炭热解性能的影响规律。研究表明,提升热解温度能有效提高反应器的传热速率,并易促进焦油的二次反应,获得更多的富氢热解气;粒径10∼20 mm的煤炭具有较优的传热性能,该粒径的煤炭能更快地进行热解反应;鄂尔多斯低阶煤的传热和热解性能更优异,热解后并无结焦性,更适用于移动床反应器。在上述优化的条件下,开展了连续10 h的煤炭热解-干熄焦移动床实验,研究表明热解性能基本与固定床相吻合,且连续热解产物具有优异的稳定性,验证了低阶煤热解-干熄焦移动床装置的可行性。This article developed an externally heated moving bed reactor for lowrank coal pyrol-ysis,which is coupled with coke quenching in dry method.And we focused on investigating the influence of key factors such as different pyrolysis temperatures(650∼900℃),different coal particle sizes(1∼10 mm,10∼20 mm,20∼30 mm),and different coal types(Ordos and Yulin coal)on coal pyrolysis performance in the reactor.The study showed that increasing pyrolysis temperature can effectively improve the heat transfer rate of the reactor,which can promote the secondary reaction of tar and obtain more hydrogen rich pyrolysis gas.Coal with a particle size of 10∼20 mm has excellent heat transfer performance,and coal with this particle size can undergo pyrolysis reactions faster.Ordos low-rank coal has better heat transfer and pyrolysis performance.And this type of coal has no coking property after pyrolysis,so it is more suitable for moving bed reactors.and there is no coking after pyrolysis,making it more suitable for moving bed reactors.Under the optimized conditions mentioned above,a continuous 10 hours pyrolysis experiment was conducted on the mov-ing bed reactor with dry quenching.Research has shown that the pyrolysis performance of moving beds is basically consistent with that of fixed beds.And the products of continuous pyrolysis have excellent stability,demonstrating the feasibility of the proposed device.

关 键 词：低阶煤 外热式煤热解 干熄焦 

分 类 号：TK530.2[动力工程及工程热物理—热能工程]