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Application and research on Regenerative High Temperature Air Combustion technology on low-rank coal pyrolysis

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  • Pei, Pei
  • Wang, Qicheng
  • Wu, Daohong

Abstract

Regenerative High Temperature Air Combustion (RHTAC) technology is composed of circular-ceramic regenerator, burners, small four-way reversing valve and control system. RHTAC technology works by using the regenerator in burners to complete heat exchange between the high-temperature fume exhausted and the combustion air. Based on RHTAC technology, Regenerative Radiant Tube Combustor (RRTC) has been developed, and was adopted by Shenwu Pyrolysis Process (SPP), which is a new pyrolysis technology with the heat-carrier-free rotating bed. SPP was researched and developed to upgrade low-rank coal into the upgraded coal, tar and pyrolyzing gas. Presently, various coals from China and other countries have been conducted, including Lignite and Long flame coal. To understand the function of the RRTCs in SPP, a pilot plant has been constructed and used to investigate the effects of the RRTCs on the fume and pyrolyzer temperature distributions and pyrolyzing products. The results show that low calorific value gas fuel (>700kcal/Nm3) can be used, the heat loss in fume exhausted is low (temp. about 150°C), so thermal efficiency of the RRTC is greatly improved; the RRTCs can realize accurate temperature control and the separation of volatile materials and fume in the pyrolyzer, so as to increase tar yield and improve gas quality. The tar yield is more than 90% of the Gray-King tar yield; the pyrolyzing gas contains high contents of CH4, H2 and CO. Moreover, SPP could solve some technical problems, such as high dust content in coal tar, likely blockage of pipeline and greatly increasing the subsequent tar processing cost.

Suggested Citation

  • Pei, Pei & Wang, Qicheng & Wu, Daohong, 2015. "Application and research on Regenerative High Temperature Air Combustion technology on low-rank coal pyrolysis," Applied Energy, Elsevier, vol. 156(C), pages 762-766.
    • Handle: RePEc:eee:appene:v:156:y:2015:i:c:p:762-766
    DOI: 10.1016/j.apenergy.2015.06.070
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    References listed on IDEAS

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    1. Chen, Xiaohui & Zheng, Danxing & Guo, Jing & Liu, Jingxiao & Ji, Peijun, 2013. "Energy analysis for low-rank coal based process system to co-produce semicoke, syngas and light oil," Energy, Elsevier, vol. 52(C), pages 279-288.
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    Cited by:

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    2. Ra, Ho Won & Mun, Tae-Young & Hong, Sung Jun & Chun, Dong Hyun & Lee, Ho Tae & Yoon, Sung Min & Moon, Ji Hong & Park, Sung Jin & Lee, Seok Hyeong & Yang, Jung Hoon & Kim, Jae-Kon & Jung, Heon & Seo, M, 2021. "Indirect coal liquefaction by integrated entrained flow gasification and Rectisol/Fischer–Tropsch processes for producing automobile diesel substitutes," Energy, Elsevier, vol. 219(C).
    3. Liu, Peng & Le, Jiawei & Wang, Lanlan & Pan, Tieying & Lu, Xilan & Zhang, Dexiang, 2016. "Relevance of carbon structure to formation of tar and liquid alkane during coal pyrolysis," Applied Energy, Elsevier, vol. 183(C), pages 470-477.
    4. Wenning Zhou & Hailong Huo & Qinye Li & Ruifeng Dou & Xunliang Liu, 2019. "An Improved Comprehensive Model of Pyrolysis of Large Coal Particles to Predict Temperature Variation and Volatile Component Yields," Energies, MDPI, vol. 12(5), pages 1-15, March.
    5. Xu, Shipei & Zeng, Xi & Han, Zhennan & Cheng, Jiguang & Wu, Rongcheng & Chen, Zhaohui & Masĕk, Ondřej & Fan, Xianfeng & Xu, Guangwen, 2019. "Quick pyrolysis of a massive coal sample via rapid infrared heating," Applied Energy, Elsevier, vol. 242(C), pages 732-740.
    6. Zhang, Nan & Zhang, Jianliang & Wang, Guangwei & Ning, Xiaojun & Meng, Fanyi & Li, Chuanhui & Ye, Lian & Wang, Chuan, 2022. "Physicochemical characteristics of three-phase products of low-rank coal by hydrothermal carbonization: experimental research and quantum chemical calculation," Energy, Elsevier, vol. 261(PB).
    7. Liu, Peng & Zhang, Dexiang & Wang, Lanlan & Zhou, Yang & Pan, Tieying & Lu, Xilan, 2016. "The structure and pyrolysis product distribution of lignite from different sedimentary environment," Applied Energy, Elsevier, vol. 163(C), pages 254-262.
    8. Du, Xin & Li, Yun, 2019. "Experimental comparison and optimization on granular bed filters with three types of filling schemes," Applied Energy, Elsevier, vol. 253(C), pages 1-1.
    9. Enagi, Ibrahim I. & Al-attab, K.A. & Zainal, Z.A., 2018. "Liquid biofuels utilization for gas turbines: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 90(C), pages 43-55.

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