中国水煤浆制备技术的发展

Development of coal water mixture preparation technology in China

为了应对中国易成浆煤种(炼焦煤)储量少的现状,以神华煤等为研究对象,对其制浆工艺进行了研究。神华煤符合水煤浆对煤质的要求,但属低变质且难制浆煤种。从级配理论入手,开发出新的制浆工艺及配套专用设备和添加剂,可以利用神华煤制取高浓度水煤浆。在此基础上,利用城市污泥和造纸黑液制备生物质煤浆,提高了水煤浆的分散性,同时在工业性锅炉中的燃烧表明:负荷可在45%～100%下连续调节,燃烧效率高达98.66%。此外,分级研磨级配制浆工艺可以使水煤浆质量分数提高3%～5%,系统产能提高30%以上。

Less reserves of coking coal in China limits the development of coal water mixture industry. To resolve this issue, taking Shenhua coal as research object, investigate the slurrying technology. The Shenhua coal quality meets the requirement of coal water mixture preparation, but it is low metamorphic coal which is difficult to form slurry. Based on the grading theory, develop the proper slurry technology and relevant facilities, additive agents. Municipal sludge and black liquor are used to prepare biological coal water mixture, which could improve its dispersity. The combustion condition in industrial boiler show that, the load could be adjusted ranging from 45 percent to 100 percent, the combustion efficiency reaches up to 98.66 percent. Grading grinding process could improve the concentration of coal water mixture by 3 percent to 5 percent, the productivity increases by more than 30 percent.