污泥改性制备污泥水煤浆的中试试验研究

Pilot-scale experiment study on sludge coal water slurry preparation by sludge modification

为解决污泥与煤掺混制浆时存在配入量少、污泥水煤浆浓度过低、添加剂用量大、成本高等问题,在实验室开发了污泥复合改性剂与高效改性机相结合的新型污泥改性制备高浓度污泥水煤浆的工艺,并进行了中试制浆试验。结果表明,采用复合改性剂与高效改性机对污泥进行改性,得到的改性污泥黏度比单纯用改性剂得到的改性污泥黏度降低30%以上,这种改性方法完全可以替代流体激波工艺处理污泥。污泥添加量为15%时,污泥水煤浆浓度比不添加改性污泥的普通水煤浆低3%左右,而采用同样污泥改性工艺和优化粒度级配,污泥水煤浆的浓度与普通水煤浆浓度相当,说明采用污泥改性和优化粒度级配可以解决污泥水煤浆浓度低的问题。中试生产线制浆试验结果验证了小试结果和中试装置的可靠性。

In order to improve the addition of sludge and sludge coal water slurry concentration,reduce additive and production cost,a process of preparing high concentration sludge coal water slurry was developed in the laboratory by compounding modifying agent and high efficiency modification machine. Pilot-scale experiments were carried out to verify the results. The results showed that by using the compound modifying agent and high efficiency modification machine,the modified sludge viscosity was reduced by 30%,and the modified method could completely replace the fluid shock process. When the sludge content was 15%,the concentration of coal water slurry prepared by the modified sludge was 3% lower than that of ordinary coal slurry. The concentration of sludge water coal slurry prepared by the same sludge modification process and the optimized particle size distribution was quite similar to that of ordinary coal slurry. The pilot-scale results verified the laboratory-scale results and the reliability of the pilot-scale device.