Upgrading of Low Rank Coals and Development of Coal Slurrification Technology.

低阶煤的升级与煤浆化技术的发展。

• 批准号: 07650898
• 负责人: USUI Hiromoto
• 金额: $ 1.34万
• 依托单位: Yamaguchi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650898/
• 关键词: Coal; Slurry; Low Rank Coal; Upgrading; Energy; 石油代替燃料

The most representative upgrading process of low rank coals is the hot water drying process, which has been extensively investigated in USA,Australia and Japan. The upgrading effect of this process is remarkable, but the cost of upgrading by the hot water drying process is very high. Thus the object of this research was to reduce the cost of upgrading as possible. After several try and error for the different upgrading process, we found that the combined process of vacuum drying and tar coating was the most effective to reduce the cost of upgrading of low rank coals. The usual hot water drying process employs the following temperature and pressure conditions ; T=350ﾟC and P=150atm. On the other hand, the temperature and pressure conditions of the combined process developed in this study were T=300ﾟC and P=5atm, respectively. This means that the cost of upgrading was very much reduced. The slurrification of upgraded coals was successfully done. The apparent viscosity of 60 wt% slurry was less than 1 Pa・s, which means that the coal water slurry prepared by this upgrading process can be used as a feed of coal gasification or direct slurry burning process. The process developed in this study is promising as a coal utilizing process. Feasibility study of this process for the commercial plant is needed to confirm the usefullness of this process.

热水干燥是低阶煤最具代表性的提质工艺，在美国、澳大利亚和日本等国得到了广泛的研究。该工艺提质效果显著，但热水干燥工艺提质成本很高。因此，本研究的目的是尽可能降低升级成本。通过对不同改质工艺的反复试验，发现真空干燥与焦油涂布相结合的工艺是降低低阶煤改质成本的最有效方法。通常的热水干燥工艺采用以下温度和压力条件：T=350 ° C和P= 150 atm。另一方面，本研究中开发的组合工艺的温度和压力条件分别为T=300 ℃和P=5atm。这意味着升级的成本大大降低。成功地进行了改质煤的制浆。60wt%水煤浆的表观粘度小于1Pa·s，可作为煤气化或直接浆燃烧工艺的原料。本研究开发的工艺作为一种煤的综合利用工艺是很有前途的。需要对该工艺进行商业化工厂的可行性研究，以确认该工艺的可用性。

项目成果

薄井洋基: "低品位炭の改質スラリー化プロセスの開発" 化学工学会第29回秋季大会(1996.9). (発表予定). (1996)

Hiroki Usui：“低阶煤重整浆料工艺的开发”第 29 届化学工程师学会秋季会议（1996 年 9 月）（报告安排）。

薄井 洋基他4名: "Sedimentaition Stability and Rheology of Coal Water Mixture" Proc.of Engineering Foundation Conference on Rheology in Mineral Industry. Feb.16-21 San Diego. TH-7 (1997)

Hiroki Usui 和其他 4 人：“煤水混合物的沉积稳定性和流变学”Proc.of Engineering Foundation Conference on Rheology in Mineral Industry Feb.16-21 San Diego (圣地亚哥)。

薄井 洋基 他3名: "Pheology of Low Rank Coal Slurry Prepared by Upgrading Process" Proc.of Engineering Foundation Conference on Rheology in Mineral Industry. Feb.16-21 San Diego. TH-3 (1997)

Hiroki Usui 和其他 3 人：“通过升级过程制备的低阶煤浆的流变学”Proc.of Engineering Foundation Conference on Rheology in Mineral Industry Feb.16-21 San Diego (圣地亚哥)。

薄井 洋基 他4名: "Sedimentaition Stability and Rheology of Coal Water Mixture" Proc.of Engineering Foundation Conference on Rheology in Mineral Industry. Feb.16-21 San Diego. TH-7 (1997)

Hiroki Usui 和其他 4 人：“煤水混合物的沉积稳定性和流变学”Proc.of Engineering Foundation Conference on Rheology in Mineral Industry Feb.16-21 San Diego (圣地亚哥)。

H.Usui, T.Tachikawa and T.Saeki: "Rheology of Low Rank Coal Slurries Prepared by Upgrading Process" Proc.of Eng.Foundation Conf.on Rheology in Mineral Industry. Feb.16-21, San Diego. TH-3 (1997)

H.Usui、T.Tachikawa 和 T.Saeki：“通过升级过程制备的低阶煤浆的流变学”Proc.of Eng.Foundation Conf.on Rheology in Mineral Industry。