煤炭工程 ›› 2020, Vol. 52 ›› Issue (5): 22-26.doi: 10.11799/ce202005006

• 专题论坛 • 上一篇    下一篇

加压预处理对褐煤成浆性的影响研究

谷红伟   

  1. 神华销售集团有限公司
  • 收稿日期:2019-08-08 修回日期:2019-10-08 出版日期:2020-05-15 发布日期:2020-07-23
  • 通讯作者: 谷红伟 E-mail:11220117@chnenergy.com.cn

  • Received:2019-08-08 Revised:2019-10-08 Online:2020-05-15 Published:2020-07-23

摘要: 针对褐煤难以制备高浓度水煤浆的问题,通过加压预处理改善褐煤的孔隙结构,降低其水分含量,提高褐煤的成浆浓度。研究了单纯的压力作用对孔隙结构、脱水量及成浆性的影响,探讨了加压作用对提高褐煤成浆性的作用机理。研究结果表明,加压预处理能够降低褐煤水分含量、比表面积和孔容,对高含水量的褐煤〖DK〗(水分含量30%左右〖DK〗),可采用加压的方法脱除部分水分,压闭部分孔隙,当线压力增大至130~150kN/cm时,水分脱除量增加明显,约达到14%。随着压力的增大,褐煤的成浆性提高,当压力为150kN/cm时,最大成浆浓度达到53.1%,相比原煤提高了5.1%。

关键词: 加压预处理, 褐煤, 成浆性, 脱水, 孔结构

Abstract: Abstract: To solve the problem that lignite is difficult to prepare high-concentration coal-water slurry, pressure pretreatment is adopted to increase slurry concentration, and the mechanism of pressure action on improving slurry concentration of lignite is discussed. The results show that pressurized pretreatment can reduce water content, specific surface area and pore volume of lignite. With the increase of pressure, the slurability of lignite increases. When the pressure is 150KN/cm, the maximum slurry concentration reaches 53.1%, which is 5.1% higher than the raw coal.

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