Preparation of biomass coal water slurry through blending distillers' grains with anthracite
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摘要: 利用白酒酒糟与贵州无烟煤按不同比例掺混制备生物质水煤浆(BCWS),考查了酒糟掺混量、添加剂种类及含量对水煤浆成浆性能的影响。结果表明,在萘磺酸系添加剂(MF、NNO)和木质素磺酸钙(LS)三种添加剂中,MF的分散效果要优于其他两种,且添加量为0.5%时最佳;表观黏度为1 000 mPa·s时,无烟煤单独制浆最大成浆浓度为70%,而掺混3%(干基)酒糟的BCWS定黏浓度为65.8%,浆体稳定性在3d以上;BCWS属于宾汉塑性流体,酒糟含有大量的亲水性含氧官能团,以及其管束和脉络结构,会引起BCWS表观黏度的升高,有利于提高BCWS的稳定性。Abstract: The biomass coal-water slurries (BCWS) were prepared using Guizhou anthracite and distillers' grain with different proportions. The influence on slurry ability of BCWS with different type and addition of additives and distillers' grains blend proportion was studied. The results show that among naphthalene sulfonic additives (MF, NNO) and calcium lignosulphonate (LS) the dispersion effect of MF, exhibiting the best viscosity reduction effect when the addition is 0.5%, is better than that of NNO and LS. The anthracite slurry concentration is 70%, but the concentration of BCWS is 65.8% with stability of over 3 d when the distillers' grains blend proportion is 3%. BCWS belongs to Bingham plastic fluid. The bundle and vein structure of distillers' grains with vast hydrophilic oxygen-containing groups are the main reason of the increasing apparent viscosity, but could improve the stability of BCWS.
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Key words:
- BCWS /
- distillers' grains /
- slurry ability /
- apparent viscosity /
- stability
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图 1 酒糟掺混量对BCWS表观黏度的影响
Figure 1 Effect of JZ blend proportion on apparent viscosity of BCWS
图 2 添加剂含量对BCWS表观黏度的影响
Figure 2 Effect of addition on apparent viscosity of BCWS
(a): MF; (b): NNO; (c): LS
■: blend 0 JZ; ●: blend 3% JZ; ▲: blend 5% JZ; ▼: blend 7% JZ
图 3 BCWS浓度对表观黏度的影响
Figure 3 Effect of BCWS concentration on the apparent viscosity
WYM CWS: △: MF; ◇: NNO; ○: LS;
blend 3% JZ BCWS: ▲: MF; ◆: NNO; ●: LS
图 4 不同酒糟掺混量的BCWS流变特性
Figure 4 Rheological behavior of BCWS under different JZ blend proportions
■: blend 0 JZ; ●: blend 3% JZ; ▲: blend 5% JZ; ▼: blend 7% JZ
图 5 不同酒糟掺混量下水煤浆析水率
Figure 5 Drainage rate of BCWS under different JZ blend proportions
图 6 玻璃棒入侵比例与时间的关系
Figure 6 Relationship between invation proportion and time
■: blend 0 JZ; ●: blend 3% JZ; ▲: blend 5% JZ; ▼: blend 7% JZ
图 8 无烟煤与酒糟电镜显微照片及能谱分析
Figure 8 Micrograph of SEM images and EDX analysis of anthracite and distillers’ grains
(a): WYM; (b): JZ
表 1 贵州无烟煤和酒糟的工业分析及元素分析
Table 1 Proximate and elemental analysis of Guizhou anthracite and distillers’ grains
Sample Proximate analysis wad/% Ultimate analysis wd/% Heat valueQnet,ar/(MJ·kg-1) M V A FC C H N S other WYM 2.47 6.02 14.59 76.74 76.32 2.17 1.12 1.98 18.41 29.83 JZ 9.44 69.47 5.00 16.09 60.12 4.82 3.24 0.23 31.59 21.82 WYM refers to Guizhou anthracite and JZ refers to distillers’ grains (the same below) 
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表 2 水煤浆制浆粒径分布
Table 2 Size distribution of CWS preparation
Distrioution w/% <75μm 75-150μm 150-250μm >250μm 64.41 16.57 13.76 5.26
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表 3 无烟煤和酒糟的能谱分析
Table 3 EDX analysis of anthracite and distillers' grains
Element of WYM w/% Element of JZ w/% C O Al Si S C O K Si Cl 80.70 10.95 1.93 1.06 5.36 68.80 30.79 0.24 0.10 0.17
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