化工进展 ›› 2018, Vol. 37 ›› Issue (04): 1414-1420.DOI: 10.16085/j.issn.1000-6613.2017-1289

• 能源加工与技术 • 上一篇    下一篇

基于固定床气化废水的褐煤水热提浓制浆

杨明顺1,2, 康善娇2, 刘卫兵2, 李春启2, 段世慈2, 解强1   

  1. 1 中国矿业大学(北京)化学与环境工程学院, 北京 100083;
    2 大唐国际化工技术研究院有限公司, 北京 100070
  • 收稿日期:2017-06-26 修回日期:2017-09-09 出版日期:2018-04-05 发布日期:2018-04-05
  • 通讯作者: 杨明顺(1986-),男,博士研究生,工程师。
  • 作者简介:杨明顺(1986-),男,博士研究生,工程师。E-mail:360276357@qq.com。

Concentrated coal-water slurry from lignite via hydrothermal process using fixed-bed gasification wastewater

YANG Mingshun1,2, KANG Shanjiao2, LIU Weibing2, LI Chunqi2, DUAN Shici2, XIE Qiang1   

  1. 1 School of Chemical & Enviromental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China;
    2 Datang International Chemical Technology Research Institute Co., Ltd., Beijing 100070, China
  • Received:2017-06-26 Revised:2017-09-09 Online:2018-04-05 Published:2018-04-05

摘要: 针对煤化工产业存在的"煤头水尾"制约难题,提出采用水煤浆气化技术耦合消纳褐煤(末煤)和废水的思路。对某代表性煤制合成天然气示范项目(SNG)固定床气化装置的5组褐煤及8组废水(W1~W8)、参照组去离子水(W0)进行了组分分析和直接制浆试验,并开展了水热处理制浆试验。研究结果表明:褐煤固定床气化废水有机质和盐含量总体较高,W8固含量达35.1%。褐煤直接制浆时,W1~W7所制水煤浆浓度介于46%~53%,与W0的制浆效果相当,W8所制水煤浆的浓度低于45%;褐煤经300℃水热处理后,分别采用W0和W4的制浆浓度总体超过58%、56%,比直接制浆浓度提高5.5%~11.7%(绝对值),满足水煤浆气化需求。本研究思路有利于耦合利用褐煤与废水,进而拓宽褐煤(末煤)的应用范围和促进废水的资源化、减量化。

关键词: 褐煤, 废水, 水煤浆, 固定床气化, 水煤浆气化, 水热处理

Abstract: The paper proposed to adopt coal-water slurry(CWS) gasification technology to solve the powder lignite-and wastewater-based constraints in the coal chemical industry. From the fixed-bed gasification unit of some coal-to-synthetic natural gas(SNG) plant, 5 sets lignite and 8 groups wastewater(W1-W8) were sampled and analyzed. Then each lignite was made directly or pretreated via hydrothermal process(HTP) into CWS in the presence of wastewater or using deionized water as a control group(W0). The results showed that the wastewater mostly contained high amount of organics and salts, especially for W8 with its solid content reaching 35.1%. For CWS prepared directly, the concentration ranged from 46% to 53% with W1-W7,equivalent to that of W0,while the concentration was less than 45% with W8. However, after pretreatment via HTP, the concentration of CWS with W0 and W4 exceeded to 58% and 56%,respectively, with an overall increase of 5.5%-11.7%(absolute value) in contrast to that of CWS prepared directly,and thus meeting the need of CWS gasification. Moreover,the research method would favor coupling the utilization of lignite and wastewater to broaden powder lignite application and promote waste water recycling and reduction.

Key words: lignite, wastewater, coal-water slurry, fixed-bed gasification, coal-water slurry gasification, hydrothermal process

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